def __write_output(som, conf, t, ot):
    """
    This is private  helper function for writing the output to a file

    @param som: The object to be written to file.
    @type som: C{SOM.SOM}

    @param conf: The current driver configuration object.
    @type conf: L{hlr_utils.Configure}

    @param t: The current timing object.
    @type t: C{sns_timing.DiffTime}

    @param ot: The origianl timing object.
    @type ot: C{sns_timing.DiffTime}
    """
    # Get file comments if present
    try:
        file_comments = conf.comments
        del conf.comments
    except AttributeError:
        file_comments = None

    # Writing 2D DAVE file
    if not conf.split:
        hlr_utils.write_file(conf.output,
                             "text/Dave2d",
                             som,
                             verbose=conf.verbose,
                             message="data",
                             comments=file_comments,
                             replace_path=False,
                             replace_ext=False)

    som.attr_list["config"] = conf

    hlr_utils.write_file(conf.output,
                         "text/rmd",
                         som,
                         output_ext="rmd",
                         data_ext=conf.ext_replacement,
                         path_replacement=conf.path_replacement,
                         verbose=conf.verbose,
                         message="metadata")

    if t is not None:
        t.setOldTime(ot)
        t.getTime(msg="Total Running Time")
def __write_output(som, conf, t, ot):
    """
    This is private  helper function for writing the output to a file

    @param som: The object to be written to file.
    @type som: C{SOM.SOM}

    @param conf: The current driver configuration object.
    @type conf: L{hlr_utils.Configure}

    @param t: The current timing object.
    @type t: C{sns_timing.DiffTime}

    @param ot: The origianl timing object.
    @type ot: C{sns_timing.DiffTime}
    """
    # Get file comments if present
    try:
        file_comments = conf.comments
        del conf.comments
    except AttributeError:
        file_comments = None
    
    # Writing 2D DAVE file
    if not conf.split:
        hlr_utils.write_file(conf.output, "text/Dave2d", som,
                             verbose=conf.verbose,
                             message="data",
                             comments=file_comments,
                             replace_path=False,
                             replace_ext=False)
        
    som.attr_list["config"] = conf
    
    hlr_utils.write_file(conf.output, "text/rmd", som,
                         output_ext="rmd",
                         data_ext=conf.ext_replacement,         
                         path_replacement=conf.path_replacement,
                         verbose=conf.verbose,
                         message="metadata")
    
    if t is not None:
        t.setOldTime(ot)
        t.getTime(msg="Total Running Time")
示例#3
0
def sum_by_rebin_frac(obj, axis_out, **kwargs):
    """
    This function uses the C{axis_manip.rebin_axis_1D_frac} function from the
    SCL to perform the rebinning. The function tracks the counts and fractional
    area from all spectra separately. The counts and fractional area are
    divided after all spectra have been parsed. 
    
    @param obj: Object to be rebinned and summed
    @type obj: C{SOM.SOM} or C{SOM.SO}
    
    @param axis_out: The axis to rebin the C{SOM} or C{SO} to
    @type axis_out: C{NessiList}

    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword configure: This is the object containing the driver configuration.
                        This will signal the function to write out the counts
                        and fractional area to files.
    @type configure: C{Configure}


    @return: Object that has been rebinned and summed according to the
             provided axis
    @rtype: C{SOM.SOM} or C{SOM.SO}


    @raise TypeError: The rebinning axis given is not a C{NessiList}
    @raise TypeError: The object being rebinned is not a C{SOM} or a C{SO}
    @raise TypeError: The dimension of the input object is not 1D
    """
    # import the helper functions
    import hlr_utils

    # set up for working through data
    try:
        axis_out.__type__
    except AttributeError:
        raise TypeError("Rebinning axis must be a NessiList!")

    o_descr = hlr_utils.get_descr(obj)

    if o_descr == "number" or o_descr == "list":
        raise TypeError("Do not know how to handle given type: %s" % \
                        o_descr)
    else:
        pass

    try:
        if obj.getDimension() != 1:
            raise TypeError("The input object must be 1D!. This one is "\
                            +"%dD." % obj.getDimension())
    except AttributeError:
        # obj is a SO
        if obj.dim() != 1:
            raise TypeError("The input object must be 1D!. This one is "\
                            +"%dD." % obj.dim())

    # Check for keywords
    try:
        config = kwargs["configure"]
    except KeyError:
        config = None

    (result, res_descr) = hlr_utils.empty_result(obj)

    result = hlr_utils.copy_som_attr(result, res_descr, obj, o_descr)

    import array_manip
    import axis_manip

    len_data = len(axis_out) - 1

    counts = nessi_list.NessiList(len_data)
    counts_err2 = nessi_list.NessiList(len_data)
    frac_area = nessi_list.NessiList(len_data)
    frac_area_err2 = nessi_list.NessiList(len_data)

    for i in xrange(hlr_utils.get_length(obj)):
        axis_in = hlr_utils.get_value(obj, i, o_descr, "x", 0)
        val = hlr_utils.get_value(obj, i, o_descr)
        err2 = hlr_utils.get_err2(obj, i, o_descr)

        value = axis_manip.rebin_axis_1D_frac(axis_in, val, err2, axis_out)

        (counts, counts_err2) = array_manip.add_ncerr(counts, counts_err2,
                                                      value[0], value[1])

        (frac_area,
         frac_area_err2) = array_manip.add_ncerr(frac_area, frac_area_err2,
                                                 value[2], frac_area_err2)

    # Divide the total counts by the total fractional area
    value1 = array_manip.div_ncerr(counts, counts_err2, frac_area,
                                   frac_area_err2)
    xvals = []
    xvals.append(axis_out)

    map_so = hlr_utils.get_map_so(obj, None, 0)

    hlr_utils.result_insert(result, res_descr, value1, map_so, "all", 0, xvals)

    if config is not None:
        if o_descr == "SOM":
            import SOM
            o_som = SOM.SOM()
            o_som.copyAttributes(obj)

            so = hlr_utils.get_map_so(obj, None, 0)
            so.axis[0].val = axis_out
            so.y = counts
            so.var_y = counts_err2
            o_som.append(so)

            # Write out summed counts into file
            hlr_utils.write_file(config.output,
                                 "text/Spec",
                                 o_som,
                                 output_ext="cnt",
                                 verbose=config.verbose,
                                 data_ext=config.ext_replacement,
                                 path_replacement=config.path_replacement,
                                 message="summed counts")

            # Replace counts data with fractional area. The axes remain the
            # same
            o_som[0].y = frac_area
            o_som[0].var_y = frac_area_err2

            # Write out summed fractional area into file
            hlr_utils.write_file(config.output,
                                 "text/Spec",
                                 o_som,
                                 output_ext="fra",
                                 verbose=config.verbose,
                                 data_ext=config.ext_replacement,
                                 path_replacement=config.path_replacement,
                                 message="fractional area")

    return result
示例#4
0
def process_sas_data(datalist, conf, **kwargs):
    """
    This function combines Steps 1 through 9 of the data reduction process for
    Small-Angle Scattering section 2.5.1 as specified by the documents at
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object and
    processes the data accordingly. This function should really only be used in
    the context of I{sas_reduction}.

    @param datalist: A list containing the filenames of the data to be
    processed.
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: File object that contains instrument geometry
                            information.
    @type inst_geom_dst: C{DST.GeomDST}
    
    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword trans_data: Alternate data for the transmission spectrum. This is
                         used in the absence of transmission monitors.
    @type trans_data: C{string}

    @keyword transmission: A flag that signals the function to stop after
                           doing the conversion from TOF to wavelength. The
                           default is I{False}.
    @type transmission: C{boolean}

    @keyword bkg_subtract: A list of coefficients that help determine the
                           wavelength dependent background subtraction.
    @type bkg_subtract: C{list}

    @keyword get_background: A flag that signals the function to convert the
                             main data to wavelength and exit before
                             normalizing to the beam monitor.
    @type get_background: C{boolean}

    @keyword acc_down_time: The information for the accelerator downtime.
    @type acc_down_time: C{tuple}

    @keyword bkg_scale: The scaling used for the axis dependent background
                        parameters.
    @type bkg_scale: C{float}

    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        transmission = kwargs["transmission"]
    except KeyError:
        transmission = False

    try:
        bkg_subtract = kwargs["bkg_subtract"]
    except KeyError:
        bkg_subtract = None

    try:
        trans_data = kwargs["trans_data"]
    except KeyError:
        trans_data = None

    try:
        get_background = kwargs["get_background"]
    except KeyError:
        get_background = False

    acc_down_time = kwargs.get("acc_down_time")
    bkg_scale = kwargs.get("bkg_scale")

    # Add so_axis to Configure object
    conf.so_axis = "time_of_flight"

    # Step 0: Open appropriate data files

    # Data
    if conf.verbose:
        print "Reading %s file" % dataset_type

    # The [0] is to get the data SOM and ignore the None background SOM
    dp_som = dr_lib.add_files(datalist, Data_Paths=conf.data_paths.toPath(),
                              SO_Axis=conf.so_axis, Signal_ROI=conf.roi_file,
                              dataset_type=dataset_type,
                              Verbose=conf.verbose, Timer=t)
    
    if t is not None:
        t.getTime(msg="After reading %s " % dataset_type)

    dp_som1 = dr_lib.fix_bin_contents(dp_som)

    del dp_som

    if conf.inst_geom is not None:
        i_geom_dst.setGeometry(conf.data_paths.toPath(), dp_som1)

    if conf.dump_tof_r:
        dp_som1_1 = dr_lib.create_param_vs_Y(dp_som1, "radius", "param_array",
                                             conf.r_bins.toNessiList(),
                                             y_label="counts",
                                             y_units="counts / (usec * m)",
                                             x_labels=["Radius", "TOF"], 
                                             x_units=["m", "usec"])

        hlr_utils.write_file(conf.output, "text/Dave2d", dp_som1_1,
                             output_ext="tvr",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="TOF vs radius information")

        del dp_som1_1

    if conf.dump_tof_theta:
        dp_som1_1 = dr_lib.create_param_vs_Y(dp_som1, "polar", "param_array",
                                             conf.theta_bins.toNessiList(),
                                             y_label="counts",
                                             y_units="counts / (usec * rads)",
                                             x_labels=["Polar Angle", "TOF"], 
                                             x_units=["rads", "usec"])

        hlr_utils.write_file(conf.output, "text/Dave2d", dp_som1_1,
                             output_ext="tvt",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="TOF vs polar angle information")        

        del dp_som1_1
        
    # Beam monitor
    if not get_background:
        if conf.beammon_over is None:
            if conf.verbose:
                print "Reading in beam monitor data from %s file" \
                      % dataset_type

                # The [0] is to get the data SOM and ignore the None
                # background SOM
                dbm_som0 = dr_lib.add_files(datalist,
                                            Data_Paths=conf.bmon_path.toPath(),
                                            SO_Axis=conf.so_axis,
                                            dataset_type=dataset_type,
                                            Verbose=conf.verbose,
                                            Timer=t)
            
                if t is not None:
                    t.getTime(msg="After reading beam monitor data ")

                if conf.inst_geom is not None:
                    i_geom_dst.setGeometry(conf.bmon_path.toPath(), dbm_som0)
        else:
            if conf.verbose:
                print "Reading in vanadium data"

                dbm_som0 = dr_lib.add_files(datalist,
                                          Data_Paths=conf.data_paths.toPath(),
                                            Signal_ROI=conf.roi_file,
                                            SO_Axis=conf.so_axis,
                                            dataset_type=dataset_type,
                                            Verbose=conf.verbose,
                                            Timer=t)
                if t is not None:
                    t.getTime(msg="After reading vanadium data ")

                if conf.inst_geom is not None:
                    i_geom_dst.setGeometry(conf.data_paths.toPath(), dbm_som0)


        dbm_som1 = dr_lib.fix_bin_contents(dbm_som0)
        
        del dbm_som0
    else:
        dbm_som1 = None

    # Transmission monitor
    if trans_data is None:
        if conf.verbose:
            print "Reading in transmission monitor data from %s file" \
                  % dataset_type
        try:
            dtm_som0 = dr_lib.add_files(datalist,
                                        Data_Paths=conf.tmon_path.toPath(),
                                        SO_Axis=conf.so_axis,
                                        dataset_type=dataset_type,
                                        Verbose=conf.verbose,
                                        Timer=t)
            if t is not None:
                t.getTime(msg="After reading transmission monitor data ")

                if conf.inst_geom is not None:
                    i_geom_dst.setGeometry(conf.tmon_path.toPath(), dtm_som0)
                    
            dtm_som1 = dr_lib.fix_bin_contents(dtm_som0)
                
            del dtm_som0
        # Transmission monitor cannot be found
        except KeyError:
            if conf.verbose:
                print "Transmission monitor not found"
            dtm_som1 = None
    else:
        dtm_som1 = None

    # Note: time_zero_offset_det MUST be a tuple
    if conf.time_zero_offset_det is not None:
        dp_som1.attr_list["Time_zero_offset_det"] = \
                                     conf.time_zero_offset_det.toValErrTuple()
    # Note: time_zero_offset_mon MUST be a tuple
    if conf.time_zero_offset_mon is not None and not get_background and \
           conf.beammon_over is None:
        dbm_som1.attr_list["Time_zero_offset_mon"] = \
                                     conf.time_zero_offset_mon.toValErrTuple()
    if conf.beammon_over is not None:
        dbm_som1.attr_list["Time_zero_offset_det"] = \
                                     conf.time_zero_offset_det.toValErrTuple()
    if trans_data is None and dtm_som1 is not None:
        dtm_som1.attr_list["Time_zero_offset_mon"] = \
                                     conf.time_zero_offset_mon.toValErrTuple()

    # Step 1: Convert TOF to wavelength for data and monitor
    if conf.verbose:
        print "Converting TOF to wavelength"

    if t is not None:
        t.getTime(False)

    if not get_background:
        # Convert beam monitor
        if conf.beammon_over is None:
            dbm_som2 = common_lib.tof_to_wavelength_lin_time_zero(
                dbm_som1,
                units="microsecond",
                time_zero_offset=conf.time_zero_offset_mon.toValErrTuple())
        else:
            dbm_som2 = common_lib.tof_to_wavelength_lin_time_zero(
                dbm_som1,
                units="microsecond",
                time_zero_offset=conf.time_zero_offset_det.toValErrTuple(),
                inst_param="total")
    else:
        dbm_som2 = None

    # Convert detector pixels
    dp_som2 = common_lib.tof_to_wavelength_lin_time_zero(
        dp_som1,
        units="microsecond",
        time_zero_offset=conf.time_zero_offset_det.toValErrTuple(),
        inst_param="total")

    if get_background:
        return dp_som2

    if dtm_som1 is not None:
        # Convert transmission  monitor
        dtm_som2 = common_lib.tof_to_wavelength_lin_time_zero(
            dtm_som1,
            units="microsecond",
            time_zero_offset=conf.time_zero_offset_mon.toValErrTuple())
    else:
        dtm_som2 = dtm_som1
        
    if t is not None:
        t.getTime(msg="After converting TOF to wavelength ")

    del dp_som1, dbm_som1, dtm_som1

    if conf.verbose and (conf.lambda_low_cut is not None or \
                         conf.lambda_high_cut is not None):
        print "Cutting data spectra"

    if t is not None:
        t.getTime(False)

    dp_som3 = dr_lib.cut_spectra(dp_som2, conf.lambda_low_cut,
                                 conf.lambda_high_cut)

    if t is not None:
        t.getTime(msg="After cutting data spectra ")

    del dp_som2

    if conf.beammon_over is not None:
        dbm_som2 = dr_lib.cut_spectra(dbm_som2, conf.lambda_low_cut,
                                       conf.lambda_high_cut)
        
    if conf.dump_wave:
        hlr_utils.write_file(conf.output, "text/Spec", dp_som3,
                             output_ext="pxl",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="pixel wavelength information")
    if conf.dump_bmon_wave:
        if conf.beammon_over is None:
            hlr_utils.write_file(conf.output, "text/Spec", dbm_som2,
                                 output_ext="bmxl",
                                 extra_tag=dataset_type,
                                 verbose=conf.verbose,
                                 data_ext=conf.ext_replacement,
                                 path_replacement=conf.path_replacement,
                                 message="beam monitor wavelength information")
        else:
            
            dbm_som2_1 = dr_lib.sum_by_rebin_frac(dbm_som2,
                                               conf.lambda_bins.toNessiList())
            hlr_utils.write_file(conf.output, "text/Spec", dbm_som2_1,
                                 output_ext="bmxl",
                                 extra_tag=dataset_type,
                                 verbose=conf.verbose,
                                 data_ext=conf.ext_replacement,
                                 path_replacement=conf.path_replacement,
                                 message="beam monitor override wavelength "\
                                 +"information")
            del dbm_som2_1

    # Step 2: Subtract wavelength dependent background if necessary
    if conf.verbose and bkg_subtract is not None:
        print "Subtracting wavelength dependent background"
        
    if bkg_subtract is not None:
        if t is not None:
            t.getTime(False)

        duration = dp_som3.attr_list["%s-duration" % dataset_type]
        scale = duration.getValue() - acc_down_time[0]
            
        dp_som4 = dr_lib.subtract_axis_dep_bkg(dp_som3, bkg_subtract,
                                               old_scale=bkg_scale,
                                               new_scale=scale)

        if t is not None:
            t.getTime(msg="After subtracting wavelength dependent background ")
    else:
        dp_som4 = dp_som3

    del dp_som3

    # Step 3: Efficiency correct beam monitor
    if conf.verbose and conf.mon_effc:
        print "Efficiency correct beam monitor data"

    if t is not None:
        t.getTime(False)

    if conf.mon_effc:
        dbm_som3 = dr_lib.feff_correct_mon(dbm_som2, inst_name=conf.inst,
                                           eff_const=conf.mon_eff_const)
    else:
        dbm_som3 = dbm_som2

    if t is not None and conf.mon_effc:
        t.getTime(msg="After efficiency correcting beam monitor ")

    if conf.dump_bmon_effc and conf.mon_effc:   
        hlr_utils.write_file(conf.output, "text/Spec", dbm_som3,
                             output_ext="bmel",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="beam monitor wavelength information "\
                             +"(efficiency)")

    del dbm_som2

    # Step 4: Efficiency correct transmission monitor    
    if dtm_som2 is not None:
        if conf.verbose and conf.mon_effc:
            print "Efficiency correct transmission monitor data"

        if t is not None:
            t.getTime(False)

        if conf.mon_effc:
            dtm_som3 = dr_lib.feff_correct_mon(dtm_som2)
        else:
            dtm_som3 = dtm_som2
    else:
        dtm_som3 = dtm_som2            

    if t is not None and conf.mon_effc and dtm_som2 is not None:
        t.getTime(msg="After efficiency correcting beam monitor ")

    # Step 5: Efficiency correct detector pixels
    if conf.det_effc:
        if conf.verbose:
            print "Calculating detector efficiency"

        if t is not None:
            t.getTime(False)

        det_eff = dr_lib.create_det_eff(dp_som4, inst_name=conf.inst,
                                      eff_scale_const=conf.det_eff_scale_const,
                                      eff_atten_const=conf.det_eff_atten_const)

        if t is not None:
            t.getTime(msg="After calculating detector efficiency")

        if conf.verbose:
            print "Applying detector efficiency"

        if t is not None:
            t.getTime(False)

        dp_som5 = common_lib.div_ncerr(dp_som4, det_eff)

        if t is not None:
            t.getTime(msg="After spplying detector efficiency")

    else:
        dp_som5 = dp_som4

    del dp_som4

    # Step 6: Rebin beam monitor axis onto detector pixel axis
    if conf.beammon_over is None:
        if not conf.no_bmon_norm:
            if conf.verbose:
                print "Rebin beam monitor axis to detector pixel axis"

            if t is not None:
                t.getTime(False)

            dbm_som4 = dr_lib.rebin_monitor(dbm_som3, dp_som5, rtype="frac")

            if t is not None:
                t.getTime(msg="After rebinning beam monitor ")
        else:
            dbm_som4 = dbm_som3
    else:
        dbm_som4 = dbm_som3

    del dbm_som3

    if conf.dump_bmon_rebin:
        hlr_utils.write_file(conf.output, "text/Spec", dbm_som4,
                             output_ext="bmrl",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="beam monitor wavelength information "\
                             +"(rebinned)")

    # Step 7: Normalize data by beam monitor
    if not conf.no_bmon_norm:
        if conf.verbose:
            print "Normalizing data by beam monitor"

        if t is not None:
            t.getTime(False)

        dp_som6 = common_lib.div_ncerr(dp_som5, dbm_som4)

        if t is not None:
            t.getTime(msg="After normalizing data by beam monitor ")
    else:
        dp_som6 = dp_som5

    del dp_som5

    if transmission:
        return dp_som6

    if conf.dump_wave_bmnorm:
        dp_som6_1 = dr_lib.sum_by_rebin_frac(dp_som6,
                                             conf.lambda_bins.toNessiList())

        write_message = "combined pixel wavelength information"
        write_message += " (beam monitor normalized)"
        
        hlr_utils.write_file(conf.output, "text/Spec", dp_som6_1,
                             output_ext="pbml",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message=write_message)
        del dp_som6_1

    if conf.dump_wave_r:
        dp_som6_1 = dr_lib.create_param_vs_Y(dp_som6, "radius", "param_array",
                                   conf.r_bins.toNessiList(),
                                   rebin_axis=conf.lambda_bins.toNessiList(),
                                   y_label="counts",
                                   y_units="counts / (Angstrom * m)",
                                   x_labels=["Radius", "Wavelength"], 
                                   x_units=["m", "Angstrom"])

        hlr_utils.write_file(conf.output, "text/Dave2d", dp_som6_1,
                             output_ext="lvr",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="wavelength vs radius information")

        del dp_som6_1

    if conf.dump_wave_theta:
        dp_som6_1 = dr_lib.create_param_vs_Y(dp_som6, "polar", "param_array",
                                   conf.theta_bins.toNessiList(),
                                   rebin_axis=conf.lambda_bins.toNessiList(),
                                   y_label="counts",
                                   y_units="counts / (Angstrom * rads)",
                                   x_labels=["Polar Angle", "Wavelength"], 
                                   x_units=["rads", "Angstrom"])

        hlr_utils.write_file(conf.output, "text/Dave2d", dp_som6_1,
                             output_ext="lvt",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="wavelength vs polar angle information") 

        del dp_som6_1

    # Step 8: Rebin transmission monitor axis onto detector pixel axis
    if trans_data is not None:
        print "Reading in transmission monitor data from file"

        dtm_som3 = dr_lib.add_files([trans_data],
                                    dataset_type=dataset_type,
                                    dst_type="text/Spec",
                                    Verbose=conf.verbose,
                                    Timer=t)

    
    if conf.verbose and dtm_som3 is not None:
        print "Rebin transmission monitor axis to detector pixel axis"
        
    if t is not None:
        t.getTime(False)

    dtm_som4 = dr_lib.rebin_monitor(dtm_som3, dp_som6, rtype="frac")

    if t is not None and dtm_som3 is not None:
        t.getTime(msg="After rebinning transmission monitor ")

    del dtm_som3

    # Step 9: Normalize data by transmission monitor    
    if conf.verbose and dtm_som4 is not None:
        print "Normalizing data by transmission monitor"

    if t is not None:
        t.getTime(False)

    if dtm_som4 is not None:
        # The transmission spectra derived from sas_tranmission does not have
        # the same y information by convention as sample data or a
        # tranmission monitor. Therefore, we'll fake it by setting the
        # y information from the sample data into the transmission
        if trans_data is not None:
            dtm_som4.setYLabel(dp_som6.getYLabel())
            dtm_som4.setYUnits(dp_som6.getYUnits())
        dp_som7 = common_lib.div_ncerr(dp_som6, dtm_som4)
    else:
        dp_som7 = dp_som6

    if t is not None and dtm_som4 is not None:
        t.getTime(msg="After normalizing data by transmission monitor ")

    del dp_som6

    # Step 10: Convert wavelength to Q for data
    if conf.verbose:
        print "Converting data from wavelength to scalar Q"
    
    if t is not None:
        t.getTime(False)

    dp_som8 = common_lib.wavelength_to_scalar_Q(dp_som7)

    if t is not None:
        t.getTime(msg="After converting wavelength to scalar Q ")
        
    del dp_som7

    if conf.facility == "LENS":
        # Step 11: Apply SAS correction factor to data
        if conf.verbose:
            print "Applying geometrical correction"

        if t is not None:
            t.getTime(False)

        dp_som9 = dr_lib.apply_sas_correct(dp_som8)

        if t is not None:
            t.getTime(msg="After applying geometrical correction ")

        return dp_som9
    else:
        return dp_som8
def run(config, tim=None):
    """
    This method is where the data reduction process gets done.

    @param config: Object containing the data reduction configuration
                   information.
    @type config: L{hlr_utils.Configure}

    @param tim: (OPTIONAL) Object that will allow the method to perform
                           timing evaluations.
    @type tim: C{sns_time.DiffTime}
    """
    import common_lib
    import dr_lib
    import DST

    if tim is not None:
        tim.getTime(False)
        old_time = tim.getOldTime()

    if config.data is None:
        raise RuntimeError("Need to pass a data filename to the driver "\
                           +"script.")

    # Read in geometry if one is provided
    if config.inst_geom is not None:
        if config.verbose:
            print "Reading in instrument geometry file"
            
        inst_geom_dst = DST.getInstance("application/x-NxsGeom",
                                        config.inst_geom)
    else:
        inst_geom_dst = None

    # Perform early background subtraction if the hwfix flag is used
    if config.hwfix:
        if not config.mc:
            so_axis = "time_of_flight"
        else:
            so_axis = "Time_of_Flight"
        
        bkg_som0 = dr_lib.add_files(config.back,
                                    Data_Paths=config.data_paths.toPath(),
                                    SO_Axis=so_axis,
                                    Signal_ROI=config.roi_file,
                                    dataset_type="background",
                                    Verbose=config.verbose, Timer=tim)

        bkg_som = dr_lib.fix_bin_contents(bkg_som0)
        del bkg_som0
    else:
        bkg_som = None

    # Perform Steps 1-15 on sample data
    d_som1 = dr_lib.process_igs_data(config.data, config, timer=tim,
                                     inst_geom_dst=inst_geom_dst,
                                     tib_const=config.tib_data_const,
                                     bkg_som=bkg_som)

    # Perform Steps 1-15 on empty can data
    if config.ecan is not None:
        e_som1 = dr_lib.process_igs_data(config.ecan, config, timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="empty_can",
                                         tib_const=config.tib_ecan_const,
                                         bkg_som=bkg_som)
    else:
        e_som1 = None

    # Perform Steps 1-15 on normalization data            
    if config.norm is not None:
        n_som1 = dr_lib.process_igs_data(config.norm, config, timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="normalization",
                                         tib_const=config.tib_norm_const,
                                         bkg_som=bkg_som)
    else:
        n_som1 = None

    # Perform Steps 1-15 on background data
    if config.back is not None:
        b_som1 = dr_lib.process_igs_data(config.back, config, timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="background",
                                         tib_const=config.tib_back_const,
                                         bkg_som=bkg_som)
    else:
        b_som1 = None

    # Perform Step 1-15 on direct scattering background data
    if config.dsback is not None:
        ds_som1 = dr_lib.process_igs_data(config.dsback, config, timer=tim,
                                          inst_geom_dst=inst_geom_dst,
                                          tib_const=config.tib_dsback_const,
                                          dataset_type="dsbackground",
                                          bkg_som=bkg_som)

        # Note: time_zero_slope MUST be a tuple
        if config.time_zero_slope is not None:
            ds_som1.attr_list["Time_zero_slope"] = \
                                      config.time_zero_slope.toValErrTuple()

        # Note: time_zero_offset MUST be a tuple
        if config.time_zero_offset is not None:
            ds_som1.attr_list["Time_zero_offset"] = \
                                      config.time_zero_offset.toValErrTuple()
        
        # Step 16: Linearly interpolate TOF elastic range in direct scattering
        #          background data

        # First convert TOF elastic range to appropriate pixel initial
        # wavelengths
        if config.verbose:
            print "Determining initial wavelength range for elastic line"

        if tim is not None:
            tim.getTime(False)
        
        if config.tof_elastic is None:
            # Units are in microseconds
            tof_elastic_range = (140300, 141300)
        else:
            tof_elastic_range = config.tof_elastic
        
        ctof_elastic_low = dr_lib.convert_single_to_list(\
               "tof_to_initial_wavelength_igs_lin_time_zero",
               (tof_elastic_range[0], 0.0),
               ds_som1)
        
        ctof_elastic_high = dr_lib.convert_single_to_list(\
               "tof_to_initial_wavelength_igs_lin_time_zero",
               (tof_elastic_range[1], 0.0),
               ds_som1)
        
        ctof_elastic_range = [(ctof_elastic_low[i][0], ctof_elastic_high[i][0])
                              for i in xrange(len(ctof_elastic_low))]

        if tim is not None:
            tim.getTime(msg="After calculating initial wavelength range for "\
                        +"elastic line ")

        del ctof_elastic_low, ctof_elastic_high

        if config.split:
            lambda_filter = [(d_som1[i].axis[0].val[0],
                              d_som1[i].axis[0].val[-1])
                             for i in xrange(len(d_som1))]
        else:
            lambda_filter = None

        # Now interpolate spectra between TOF elastic range (converted to
        # initial wavelength)
        if config.verbose:
            print "Linearly interpolating direct scattering spectra"

        if tim is not None:
            tim.getTime(False)
            
        ds_som2 = dr_lib.lin_interpolate_spectra(ds_som1, ctof_elastic_range,
                                                 filter_axis=lambda_filter)

        if tim is not None:
            tim.getTime(msg="After linearly interpolating direct scattering "\
                        +"spectra ")

        if config.dump_dslin:
            ds_som2_1 = dr_lib.sum_all_spectra(ds_som2,\
                                  rebin_axis=config.lambda_bins.toNessiList())

            hlr_utils.write_file(config.output, "text/Spec", ds_som2_1,
                                 output_ext="lin",
                                 data_ext=config.ext_replacement,    
                                 path_replacement=config.path_replacement,
                                 verbose=config.verbose,
                                 message="dsbackground linear interpolation")
            del ds_som2_1
        
        del ds_som1
    else:
        ds_som2 = None

    if inst_geom_dst is not None:
        inst_geom_dst.release_resource()

    # Steps 17-18: Subtract background spectrum from sample spectrum
    if config.dsback is None:
        back_som = b_som1
        bkg_type = "background"
    else:
        back_som = ds_som2
        bkg_type = "dsbackground"
    d_som2 = dr_lib.subtract_bkg_from_data(d_som1, back_som,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data",
                                           dataset2=bkg_type,
                                           scale=config.scale_bs)

    if config.dsback is not None:
        del ds_som2 

    # Step 19: Zero region outside TOF elastic for background for empty can
    if config.dsback is None:
        bcs_som = b_som1
        cs_som = e_som1
    else:
        if config.verbose and b_som1 is not None:
            print "Zeroing background spectra"

        if tim is not None and b_som1 is not None:
            tim.getTime(False)
            
        bcs_som = dr_lib.zero_spectra(b_som1, ctof_elastic_range)

        if tim is not None and b_som1 is not None:
            tim.getTime(msg="After zeroing background spectra")


        if config.verbose and e_som1 is not None:
            print "Zeroing empty can spectra"

        if tim is not None and e_som1 is not None:
            tim.getTime(False)
            
        cs_som = dr_lib.zero_spectra(e_som1, ctof_elastic_range)

        if tim is not None and e_som1 is not None:
            tim.getTime(msg="After zeroing empty can spectra")
            
        del ctof_elastic_range

    # Steps 20-21: Subtract background spectrum from empty can spectrum    
    e_som2 = dr_lib.subtract_bkg_from_data(cs_som, bcs_som,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data-empty_can",
                                           dataset2="background",
                                           scale=config.scale_bcs)

    # Steps 22-23: Subtract background spectrum from empty can spectrum for
    #              normalization

    try:
        config.pre_norm
    except AttributeError:
        config.pre_norm = False

    if not config.pre_norm:
        e_som3 = dr_lib.subtract_bkg_from_data(e_som1, b_som1,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="norm-empty_can",
                                               dataset2="background",
                                               scale=config.scale_bcn)
    else:
        e_som3 = None

    # Steps 24-25: Subtract background spectrum from normalization spectrum
    if not config.pre_norm:
        n_som2 = dr_lib.subtract_bkg_from_data(n_som1, b_som1,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="normalization",
                                               dataset2="background",
                                               scale=config.scale_bn)
    else:
        n_som2 = n_som1

    del b_som1, e_som1, bcs_som, cs_som

    # Steps 26-27: Subtract empty can spectrum from sample spectrum    
    d_som3 = dr_lib.subtract_bkg_from_data(d_som2, e_som2,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data",
                                           dataset2="empty_can",
                                           scale=config.scale_cs)

    del d_som2, e_som2
    
    # Steps 28-29: Subtract empty can spectrum from normalization spectrum
    if not config.pre_norm:
        n_som3 = dr_lib.subtract_bkg_from_data(n_som2, e_som3,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="normalization",
                                               dataset2="empty_can",
                                               scale=config.scale_cn)
    else:
        n_som3 = n_som2

    del n_som2, e_som3

    # Step 30-31: Integrate normalization spectra
    if config.verbose and n_som3 is not None and not config.pre_norm:
        print "Integrating normalization spectra"

    if not config.pre_norm:
        norm_int = dr_lib.integrate_spectra(n_som3, start=config.norm_start,
                                            end=config.norm_end, norm=True)
    else:
        norm_int = n_som3

    del n_som3
        
    # Step 32: Normalize data by integrated values
    if config.verbose and norm_int is not None:
        print "Normalizing data by normalization data"

    if norm_int is not None:
        d_som4 = common_lib.div_ncerr(d_som3, norm_int)
    else:
        d_som4 = d_som3

    if norm_int is not None:
        if tim is not None:
            tim.getTime(msg="After normalizing data ")

    del d_som3, norm_int

    if config.dump_norm:
        if tim is not None:
            tim.getTime(False)

        hlr_utils.write_file(config.output, "text/Spec", d_som4,
                             output_ext="wvn",
                             data_ext=config.ext_replacement,    
                             path_replacement=config.path_replacement,
                             verbose=config.verbose,
                             message="wavelength (vanadium norm) information")

        if tim is not None:
            tim.getTime(msg="After writing wavelength (vanadium norm) info ")

    # Steps 33 to end: Creating S(Q,E)
    if config.Q_bins is not None:
        if config.verbose:
            print "Creating 2D spectrum"

        if tim is not None:
            tim.getTime(False)

        d_som5 = dr_lib.create_E_vs_Q_igs(d_som4,
                                          config.E_bins.toNessiList(),
                                          config.Q_bins.toNessiList(),
                                          so_id="Full Detector",
                                          y_label="counts",
                                          y_units="counts / (ueV * A^-1)",
                                          x_labels=["Q transfer",
                                                    "energy transfer"],
                                          x_units=["1/Angstroms","ueV"],
                                          split=config.split,
                                          Q_filter=False,
                                          configure=config)
        if tim is not None:
            tim.getTime(msg="After creation of final spectrum ")

        del d_som4
        
    # Steps 33 to 36: Create S(-cos(polar), E)
    elif config.ncospol_bins is not None:
        if config.verbose:
            print "Convert wavelength to energy transfer"

        if tim is not None:
            tim.getTime(False)

        d_som4a = dr_lib.energy_transfer(d_som4, "IGS", "Wavelength_final",
                                         sa_norm=True, scale=True,
                                         change_units=True)

        if tim is not None:
            tim.getTime(msg="After wavelength to energy transfer conversion ")

        del d_som4

        if config.verbose:
            print "Creating 2D spectrum"

        if tim is not None:
            tim.getTime(False)

        d_som5 = dr_lib.create_param_vs_Y(d_som4a, "polar",
                                        "negcos_param_array",
                                        config.ncospol_bins.toNessiList(),
                                        rebin_axis=config.E_bins.toNessiList(),
                                        y_label="counts",
                                        y_units="counts / ueV",
                                        x_labels=["-cos(polar)",
                                                  "Energy Transfer"], 
                                        x_units=["", "ueV"])

        if tim is not None:
            tim.getTime(msg="After creation of final spectrum ")        
    
    # If rescaling factor present, rescale the data
    if config.rescale_final is not None and not config.split:
        d_som6 = common_lib.mult_ncerr(d_som5, (config.rescale_final, 0.0))
    else:
        d_som6 = d_som5

    if tim is None:
        old_time = None

    if not __name__ == "amorphous_reduction_sqe":
        del d_som5
        __write_output(d_som6, config, tim, old_time)
    else:
        if config.create_output:
            del d_som5
            __write_output(d_som6, config, tim, old_time)
        else:
            return d_som6
def sum_by_rebin_frac(obj, axis_out, **kwargs):
    """
    This function uses the C{axis_manip.rebin_axis_1D_frac} function from the
    SCL to perform the rebinning. The function tracks the counts and fractional
    area from all spectra separately. The counts and fractional area are
    divided after all spectra have been parsed. 
    
    @param obj: Object to be rebinned and summed
    @type obj: C{SOM.SOM} or C{SOM.SO}
    
    @param axis_out: The axis to rebin the C{SOM} or C{SO} to
    @type axis_out: C{NessiList}

    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword configure: This is the object containing the driver configuration.
                        This will signal the function to write out the counts
                        and fractional area to files.
    @type configure: C{Configure}


    @return: Object that has been rebinned and summed according to the
             provided axis
    @rtype: C{SOM.SOM} or C{SOM.SO}


    @raise TypeError: The rebinning axis given is not a C{NessiList}
    @raise TypeError: The object being rebinned is not a C{SOM} or a C{SO}
    @raise TypeError: The dimension of the input object is not 1D
    """
    # import the helper functions
    import hlr_utils

    # set up for working through data
    try:
        axis_out.__type__
    except AttributeError:
        raise TypeError("Rebinning axis must be a NessiList!")
        
    o_descr = hlr_utils.get_descr(obj)

    if o_descr == "number" or o_descr == "list":
        raise TypeError("Do not know how to handle given type: %s" % \
                        o_descr)
    else:
        pass

    try:
        if obj.getDimension() != 1:
            raise TypeError("The input object must be 1D!. This one is "\
                            +"%dD." % obj.getDimension())
    except AttributeError:
        # obj is a SO
        if obj.dim() != 1:
            raise TypeError("The input object must be 1D!. This one is "\
                            +"%dD." % obj.dim())

    # Check for keywords
    try:
        config = kwargs["configure"]
    except KeyError:
        config = None

    (result, res_descr) = hlr_utils.empty_result(obj)

    result = hlr_utils.copy_som_attr(result, res_descr, obj, o_descr)

    import array_manip
    import axis_manip

    len_data = len(axis_out) - 1

    counts = nessi_list.NessiList(len_data)
    counts_err2 = nessi_list.NessiList(len_data)
    frac_area = nessi_list.NessiList(len_data)
    frac_area_err2 = nessi_list.NessiList(len_data)

    for i in xrange(hlr_utils.get_length(obj)):
        axis_in = hlr_utils.get_value(obj, i, o_descr, "x", 0)
        val = hlr_utils.get_value(obj, i, o_descr)
        err2 = hlr_utils.get_err2(obj, i, o_descr)
        
        value = axis_manip.rebin_axis_1D_frac(axis_in, val, err2, axis_out)

        (counts, counts_err2) = array_manip.add_ncerr(counts, counts_err2,
                                                      value[0], value[1])
        
        (frac_area, frac_area_err2) = array_manip.add_ncerr(frac_area,
                                                            frac_area_err2,
                                                            value[2],
                                                            frac_area_err2)

    # Divide the total counts by the total fractional area
    value1 = array_manip.div_ncerr(counts, counts_err2, frac_area,
                                   frac_area_err2)
    xvals = []
    xvals.append(axis_out)
    
    map_so = hlr_utils.get_map_so(obj, None, 0)
        
    hlr_utils.result_insert(result, res_descr, value1, map_so, "all",
                            0, xvals)

    if config is not None:
        if o_descr == "SOM":
            import SOM
            o_som = SOM.SOM()
            o_som.copyAttributes(obj)

            so = hlr_utils.get_map_so(obj, None, 0)
            so.axis[0].val = axis_out
            so.y = counts
            so.var_y = counts_err2
            o_som.append(so)

            # Write out summed counts into file
            hlr_utils.write_file(config.output, "text/Spec", o_som,
                                 output_ext="cnt",
                                 verbose=config.verbose,
                                 data_ext=config.ext_replacement,         
                                 path_replacement=config.path_replacement,
                                 message="summed counts")
            
            # Replace counts data with fractional area. The axes remain the
            # same
            o_som[0].y = frac_area
            o_som[0].var_y = frac_area_err2
            
            # Write out summed fractional area into file
            hlr_utils.write_file(config.output, "text/Spec", o_som,
                                 output_ext="fra",
                                 verbose=config.verbose,
                                 data_ext=config.ext_replacement,         
                                 path_replacement=config.path_replacement,
                                 message="fractional area")

    return result
    comb_som = __set_som_attributes(comb_som, inst_name, **kwargs)

    if configure.dump_pix_contrib:
        som1 = SOM.SOM()
        som1.copyAttributes(comb_som)
        som1.append(SOM.SO(2, so_dim.id))
        som1[0].y = bin_count
        som1[0].var_y = bin_count_err2
        som1[0].axis[0].val = so_dim.axis[0].val
        som1[0].axis[1].val = so_dim.axis[1].val

        # Write out pixel contribution into file
        hlr_utils.write_file(configure.output, "text/Dave2d", som1,
                             output_ext="pcs",
                             verbose=configure.verbose,
                             data_ext=configure.ext_replacement,         
                             path_replacement=configure.path_replacement,
                             message="pixel contribution")

        del som1

    if split:
        comb_som.append(so_dim)
        
        # Write out summed counts into file
        hlr_utils.write_file(configure.output, "text/Dave2d", comb_som,
                             output_ext="cnt",
                             verbose=configure.verbose,
                             data_ext=configure.ext_replacement,         
                             path_replacement=configure.path_replacement,
                             message="summed counts")
def calibrate_dgs_data(datalist, conf, dkcur, **kwargs):
    """
    This function combines Steps 3 through 6 in Section 2.1.1 of the data
    reduction process for Direct Geometry Spectrometers as specified by the
    document at 
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object and
    processes the data accordingly.
    
    @param datalist: A list containing the filenames of the data to be
                     processed.
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}

    @param dkcur: The object containing the TOF dark current data.
    @type dkcur: C{SOM.SOM}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: File object that contains instrument geometry
                            information.
    @type inst_geom_dst: C{DST.GeomDST}

    @keyword tib_const: A time-independent background constant to subtract
                        from every pixel.
    @type tib_const: L{hlr_utils.DrParameter}
    
    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword cwp: A list of chopper phase corrections in units of microseconds.
    @type cwp: C{list} of C{float}s
    
    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        tib_const = kwargs["tib_const"]
    except KeyError:
        tib_const = None
    
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    dataset_cwp = kwargs.get("cwp")

    # Open the appropriate datafiles
    if conf.verbose:
        print "Reading %s file" % dataset_type

    data_paths = conf.data_paths.toPath()
    if conf.no_mon_norm:
        mon_paths = None
    else:
        mon_paths = conf.usmon_path.toPath()

    # Check for mask file since normalization drive doesn't understand option
    try:
        mask_file = conf.mask_file
    except AttributeError:
        mask_file = None

    if t is not None:
        oldtime = t.getOldTime()

    (dp_som0, dm_som0) = dr_lib.add_files_dm(datalist, Data_Paths=data_paths,
                                             Mon_Paths=mon_paths,
                                             SO_Axis=conf.so_axis,
                                             Signal_ROI=conf.roi_file,
                                             Signal_MASK=mask_file,
                                             dataset_type=dataset_type,
                                             dataset_cwp=dataset_cwp,
                                             Verbose=conf.verbose, Timer=t)

    if t is not None:
        t.setOldTime(oldtime)
        t.getTime(msg="After reading %s file" % dataset_type)

    # Cut the spectra if necessary
    dp_somA = dr_lib.cut_spectra(dp_som0, conf.tof_cut_min, conf.tof_cut_max)

    del dp_som0

    dp_somB = dr_lib.fix_bin_contents(dp_somA)

    del dp_somA

    if dp_somB.attr_list.instrument.get_name() != "CNCS":

        if conf.verbose:
            print "Cutting spectrum at minimum TOF"
        
        if t is not None:
            t.getTime(False)

        # Calculate minimum TOF for physical neutrons
        if conf.initial_energy is not None:
            initial_wavelength = common_lib.energy_to_wavelength(\
            conf.initial_energy.toValErrTuple())
            initial_velocity = common_lib.wavelength_to_velocity(\
            initial_wavelength)
        else:
            # This should actually calculate it, but don't have a way right now
            pass

        if conf.time_zero_offset is not None:
            time_zero_offset = conf.time_zero_offset.toValErrTuple()
        else:
            # This should actually calculate it, but don't have a way right now
            time_zero_offset = (0.0, 0.0)

        ss_length = dp_somB.attr_list.instrument.get_primary()
        
        tof_min = (ss_length[0] / initial_velocity[0]) + time_zero_offset[0]

        # Cut all spectra a the minimum TOF
        dp_som1 = dr_lib.cut_spectra(dp_somB, tof_min, None)

        if t is not None:
            t.getTime(msg="After cutting spectrum at minimum TOF ")
    else:
        dp_som1 = dp_somB

    del dp_somB

    if dm_som0 is not None:
        dm_som1 = dr_lib.fix_bin_contents(dm_som0)
    else:
        dm_som1 = dm_som0

    del dm_som0    

    # Override geometry if necessary
    if conf.inst_geom is not None:
        i_geom_dst.setGeometry(data_paths, dp_som1)

    if conf.inst_geom is not None and dm_som1 is not None:
        i_geom_dst.setGeometry(mon_paths, dm_som1)
    
    # Step 3: Integrate the upstream monitor
    if dm_som1 is not None:
        if conf.verbose:
            print "Integrating upstream monitor spectrum"

        if t is not None:
            t.getTime(False)
        
        if conf.mon_int_range is None:
            start_val = float("inf")
            end_val = float("inf")
        else:
            start_val = conf.mon_int_range[0]
            end_val = conf.mon_int_range[1]
        
        dm_som2 = dr_lib.integrate_spectra(dm_som1, start=start_val,
                                           end=end_val,
                                           width=True)
        if t is not None:
            t.getTime(msg="After integrating upstream monitor spectrum ")
    else:
        dm_som2 = dm_som1

    del dm_som1

    tib_norm_const = None
    
    # Step 4: Divide data set by summed monitor spectrum
    if dm_som2 is not None:
        if conf.verbose:
            print "Normalizing %s by monitor sum" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som2 = common_lib.div_ncerr(dp_som1, dm_som2, length_one_som=True)

        tib_norm_const = dm_som2[0].y

        if t is not None:
            t.getTime(msg="After normalizing %s by monitor sum" % dataset_type)

    elif conf.pc_norm:
        if conf.verbose:
            print "Normalizing %s by proton charge" % dataset_type

        pc_tag = dataset_type+"-proton_charge"
        pc = dp_som1.attr_list[pc_tag]

        # Scale the proton charge and then set the scale PC back to attributes
        if conf.scale_pc is not None:
            if conf.verbose:
                print "Scaling %s proton charge" % dataset_type

            pc = hlr_utils.scale_proton_charge(pc, conf.scale_pc)
            dp_som1.attr_list[pc_tag] = pc

        tib_norm_const = pc.getValue()

        if t is not None:
            t.getTime(False)

        dp_som2 = common_lib.div_ncerr(dp_som1, (pc.getValue(), 0.0))

        if t is not None:
            t.getTime(msg="After normalizing %s by proton charge" \
                      % dataset_type)

    else:
        dp_som2 = dp_som1

    del dp_som1, dm_som2

    # Step 5: Scale dark current by data set measurement time
    if dkcur is not None:
        if conf.verbose:
            print "Scaling dark current by %s acquisition time" % dataset_type

        if t is not None:
            t.getTime(False)

        dstime_tag = dataset_type+"-duration"
        dstime = dp_som2.attr_list[dstime_tag]

        dkcur1 = common_lib.div_ncerr(dkcur, (dstime.getValue(), 0.0))

        if t is not None:
            t.getTime(msg="After scaling dark current by %s acquisition time" \
                      % dataset_type)        
    else:
        dkcur1 = dkcur

    del dkcur

    # Step 6: Subtract scaled dark current from data set
    if dkcur1 is not None:
        if conf.verbose:
            print "Subtracting %s by scaled dark current" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som3 = common_lib.sub_ncerr(dp_som2, dkcur1)

        if t is not None:
            t.getTime(msg="After subtracting %s by scaled dark current" \
                      % dataset_type)
    elif tib_const is not None and dkcur1 is None:
        if conf.verbose:
            print "Subtracting TIB constant from %s" % dataset_type

        # Normalize the TIB constant by dividing by the current normalization
        # the duration (if necessary) and the conversion from seconds to
        # microseconds
        tib_c = tib_const.toValErrTuple()

        conv_sec_to_usec = 1.0e-6

        if tib_norm_const is None:
            tib_norm_const = 1
            duration = 1
        else:
            duration_tag = dataset_type+"-duration"
            duration = dp_som2.attr_list[duration_tag].getValue()

        norm_const = (duration * conv_sec_to_usec) / tib_norm_const

        tib_val = tib_c[0] * norm_const
        tib_err2 = tib_c[1] * (norm_const * norm_const)

        if t is not None:
            t.getTime(False)
  
        dp_som3 = common_lib.sub_ncerr(dp_som2, (tib_val, tib_err2))

        if t is not None:
            t.getTime(msg="After subtracting TIB constant from %s" \
                      % dataset_type)
    elif conf.tib_range is not None and dkcur1 is None:
        if conf.verbose:
            print "Determining TIB constant from %s" % dataset_type

        if t is not None:
            t.getTime(False)

        TIB = dr_lib.determine_time_indep_bkg(dp_som2, conf.tib_range,
                                              is_range=True)

        if t is not None:
            t.getTime(msg="After determining TIB constant from %s" \
                      % dataset_type)

        if conf.dump_tib:
            file_comment = "TIB TOF Range: [%d, %d]" % (conf.tib_range[0],
                                                        conf.tib_range[1])
        
            hlr_utils.write_file(conf.output, "text/num-info", TIB,
                                 output_ext="tib",
                                 extra_tag=dataset_type,
                                 verbose=conf.verbose,
                                 data_ext=conf.ext_replacement,
                                 path_replacement=conf.path_replacement,
                                 message="time-independent background "\
                                 +"information",
                                 tag="Average TIB",
                                 units="counts/usec",
                                 comments=[file_comment])
            
        if conf.verbose:
            print "Subtracting TIB constant from %s" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som3 = common_lib.sub_ncerr(dp_som2, TIB)

        if t is not None:
            t.getTime(msg="After subtracting TIB constant from %s" \
                      % dataset_type)

        del TIB
    else:
        dp_som3 = dp_som2

    del dp_som2, dkcur1

    if conf.dump_ctof_comb:
        dp_som3_1 = dr_lib.sum_all_spectra(dp_som3)
        hlr_utils.write_file(conf.output, "text/Spec", dp_som3_1,
                             output_ext="ctof",
                             extra_tag=dataset_type,
                             data_ext=conf.ext_replacement,    
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined calibrated TOF information")
        
        del dp_som3_1
    
    return dp_som3
示例#9
0
def process_dgs_data(obj, conf, bcan, ecan, tcoeff, **kwargs):
    """
    This function combines Steps 7 through 16 in Section 2.1.1 of the data
    reduction process for Direct Geometry Spectrometers as specified by the
    document at 
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a calibrated dataset, a L{hlr_utils.Configure} object and
    processes the data accordingly.

    @param obj: A calibrated dataset object.
    @type obj: C{SOM.SOM}

    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}

    @param bcan: The object containing the black can data.
    @type bcan: C{SOM.SOM}

    @param ecan: The object containing the empty can data.
    @type ecan: C{SOM.SOM}

    @param tcoeff: The transmission coefficient appropriate to the given data
                   set.
    @type tcoeff: C{tuple}
    
    @param kwargs: A list of keyword arguments that the function accepts:

    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword cwp_used: A flag signalling the use of the chopper phase
                       corrections.
    @type cwp_used: C{bool}

    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import array_manip
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    cwp_used = kwargs.get("cwp_used", False)

    if conf.verbose:
        print "Processing %s information" % dataset_type

    # Step 7: Create black can background contribution
    if bcan is not None:
        if conf.verbose:
            print "Creating black can background contribution for %s" \
                  % dataset_type

        if t is not None:
            t.getTime(False)

        bccoeff = array_manip.sub_ncerr(1.0, 0.0, tcoeff[0], tcoeff[1])
        bcan1 = common_lib.mult_ncerr(bcan, bccoeff)

        if t is not None:
            t.getTime(msg="After creating black can background contribution ")

        del bcan
    else:
        bcan1 = None

    # Step 8: Create empty can background contribution
    if ecan is not None:
        if conf.verbose:
            print "Creating empty can background contribution for %s" \
                  % dataset_type

        if t is not None:
            t.getTime(False)

        ecan1 = common_lib.mult_ncerr(ecan, tcoeff)

        if t is not None:
            t.getTime(msg="After creating empty can background contribution ")

        del ecan
    else:
        ecan1 = None

    # Step 9: Create background spectra
    if bcan1 is not None or ecan1 is not None and conf.verbose:
        print "Creating background spectra for %s" % dataset_type

    if bcan1 is not None and ecan1 is not None:
        if cwp_used:
            if conf.verbose:
                print "Rebinning empty can to black can axis."

            ecan2 = common_lib.rebin_axis_1D_frac(ecan1, bcan1[0].axis[0].val)
        else:
            ecan2 = ecan1

        del ecan1

        if t is not None:
            t.getTime(False)

        b_som = common_lib.add_ncerr(bcan1, ecan2)

        if t is not None:
            t.getTime(msg="After creating background spectra ")
    elif bcan1 is not None and ecan1 is None:
        b_som = bcan1
    elif bcan1 is None and ecan1 is not None:
        b_som = ecan1
    else:
        b_som = None

    del bcan1, ecan1

    if cwp_used:
        if conf.verbose:
            print "Rebinning background spectra to %s" % dataset_type

        b_som1 = common_lib.rebin_axis_1D_frac(b_som, obj[0].axis[0].val)
    else:
        b_som1 = b_som

    del b_som

    if conf.dump_ctof_comb and b_som1 is not None:
        b_som_1 = dr_lib.sum_all_spectra(b_som1)
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             b_som_1,
                             output_ext="ctof",
                             extra_tag="background",
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined background TOF information")
        del b_som_1

    # Step 10: Subtract background from data
    obj1 = dr_lib.subtract_bkg_from_data(obj,
                                         b_som1,
                                         verbose=conf.verbose,
                                         timer=t,
                                         dataset1=dataset_type,
                                         dataset2="background")

    del obj, b_som1

    # Step 11: Calculate initial velocity
    if conf.verbose:
        print "Calculating initial velocity"

    if t is not None:
        t.getTime(False)

    if conf.initial_energy is not None:
        initial_wavelength = common_lib.energy_to_wavelength(\
            conf.initial_energy.toValErrTuple())
        initial_velocity = common_lib.wavelength_to_velocity(\
            initial_wavelength)
    else:
        # This should actually calculate it, but don't have a way right now
        pass

    if t is not None:
        t.getTime(msg="After calculating initial velocity ")

    # Step 12: Calculate the time-zero offset
    if conf.time_zero_offset is not None:
        time_zero_offset = conf.time_zero_offset.toValErrTuple()
    else:
        # This should actually calculate it, but don't have a way right now
        time_zero_offset = (0.0, 0.0)

    # Step 13: Convert time-of-flight to final velocity
    if conf.verbose:
        print "Converting TOF to final velocity DGS"

    if t is not None:
        t.getTime(False)

    obj2 = common_lib.tof_to_final_velocity_dgs(obj1,
                                                initial_velocity,
                                                time_zero_offset,
                                                units="microsecond")

    if t is not None:
        t.getTime(msg="After calculating TOF to final velocity DGS ")

    del obj1

    # Step 14: Convert final velocity to final wavelength
    if conf.verbose:
        print "Converting final velocity DGS to final wavelength"

    if t is not None:
        t.getTime(False)

    obj3 = common_lib.velocity_to_wavelength(obj2)

    if t is not None:
        t.getTime(msg="After calculating velocity to wavelength ")

    del obj2

    if conf.dump_wave_comb:
        obj3_1 = dr_lib.sum_all_spectra(
            obj3, rebin_axis=conf.lambda_bins.toNessiList())
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             obj3_1,
                             output_ext="fwv",
                             extra_tag=dataset_type,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined final wavelength information")

        del obj3_1

    # Step 15: Create the detector efficiency
    if conf.det_eff is not None:
        if conf.verbose:
            print "Creating detector efficiency spectra"

        if t is not None:
            t.getTime(False)

        det_eff = dr_lib.create_det_eff(obj3)

        if t is not None:
            t.getTime(msg="After creating detector efficiency spectra ")
    else:
        det_eff = None

    # Step 16: Divide the detector pixel spectra by the detector efficiency
    if det_eff is not None:
        if conf.verbose:
            print "Correcting %s for detector efficiency" % dataset_type

        if t is not None:
            t.getTime(False)

        obj4 = common_lib.div_ncerr(obj3, det_eff)

        if t is not None:
            t.getTime(msg="After correcting %s for detector efficiency" \
                      % dataset_type)
    else:
        obj4 = obj3

    del obj3, det_eff

    return obj4
示例#10
0
    comb_som = __set_som_attributes(comb_som, inst_name, **kwargs)

    if configure.dump_pix_contrib:
        som1 = SOM.SOM()
        som1.copyAttributes(comb_som)
        som1.append(SOM.SO(2, so_dim.id))
        som1[0].y = bin_count
        som1[0].var_y = bin_count_err2
        som1[0].axis[0].val = so_dim.axis[0].val
        som1[0].axis[1].val = so_dim.axis[1].val

        # Write out pixel contribution into file
        hlr_utils.write_file(configure.output,
                             "text/Dave2d",
                             som1,
                             output_ext="pcs",
                             verbose=configure.verbose,
                             data_ext=configure.ext_replacement,
                             path_replacement=configure.path_replacement,
                             message="pixel contribution")

        del som1

    if split:
        comb_som.append(so_dim)

        # Write out summed counts into file
        hlr_utils.write_file(configure.output,
                             "text/Dave2d",
                             comb_som,
                             output_ext="cnt",
                             verbose=configure.verbose,
示例#11
0
def calibrate_dgs_data(datalist, conf, dkcur, **kwargs):
    """
    This function combines Steps 3 through 6 in Section 2.1.1 of the data
    reduction process for Direct Geometry Spectrometers as specified by the
    document at 
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object and
    processes the data accordingly.
    
    @param datalist: A list containing the filenames of the data to be
                     processed.
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}

    @param dkcur: The object containing the TOF dark current data.
    @type dkcur: C{SOM.SOM}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: File object that contains instrument geometry
                            information.
    @type inst_geom_dst: C{DST.GeomDST}

    @keyword tib_const: A time-independent background constant to subtract
                        from every pixel.
    @type tib_const: L{hlr_utils.DrParameter}
    
    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword cwp: A list of chopper phase corrections in units of microseconds.
    @type cwp: C{list} of C{float}s
    
    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        tib_const = kwargs["tib_const"]
    except KeyError:
        tib_const = None

    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    dataset_cwp = kwargs.get("cwp")

    # Open the appropriate datafiles
    if conf.verbose:
        print "Reading %s file" % dataset_type

    data_paths = conf.data_paths.toPath()
    if conf.no_mon_norm:
        mon_paths = None
    else:
        mon_paths = conf.usmon_path.toPath()

    # Check for mask file since normalization drive doesn't understand option
    try:
        mask_file = conf.mask_file
    except AttributeError:
        mask_file = None

    if t is not None:
        oldtime = t.getOldTime()

    (dp_som0, dm_som0) = dr_lib.add_files_dm(datalist,
                                             Data_Paths=data_paths,
                                             Mon_Paths=mon_paths,
                                             SO_Axis=conf.so_axis,
                                             Signal_ROI=conf.roi_file,
                                             Signal_MASK=mask_file,
                                             dataset_type=dataset_type,
                                             dataset_cwp=dataset_cwp,
                                             Verbose=conf.verbose,
                                             Timer=t)

    if t is not None:
        t.setOldTime(oldtime)
        t.getTime(msg="After reading %s file" % dataset_type)

    # Cut the spectra if necessary
    dp_somA = dr_lib.cut_spectra(dp_som0, conf.tof_cut_min, conf.tof_cut_max)

    del dp_som0

    dp_somB = dr_lib.fix_bin_contents(dp_somA)

    del dp_somA

    if dp_somB.attr_list.instrument.get_name() != "CNCS":

        if conf.verbose:
            print "Cutting spectrum at minimum TOF"

        if t is not None:
            t.getTime(False)

        # Calculate minimum TOF for physical neutrons
        if conf.initial_energy is not None:
            initial_wavelength = common_lib.energy_to_wavelength(\
            conf.initial_energy.toValErrTuple())
            initial_velocity = common_lib.wavelength_to_velocity(\
            initial_wavelength)
        else:
            # This should actually calculate it, but don't have a way right now
            pass

        if conf.time_zero_offset is not None:
            time_zero_offset = conf.time_zero_offset.toValErrTuple()
        else:
            # This should actually calculate it, but don't have a way right now
            time_zero_offset = (0.0, 0.0)

        ss_length = dp_somB.attr_list.instrument.get_primary()

        tof_min = (ss_length[0] / initial_velocity[0]) + time_zero_offset[0]

        # Cut all spectra a the minimum TOF
        dp_som1 = dr_lib.cut_spectra(dp_somB, tof_min, None)

        if t is not None:
            t.getTime(msg="After cutting spectrum at minimum TOF ")
    else:
        dp_som1 = dp_somB

    del dp_somB

    if dm_som0 is not None:
        dm_som1 = dr_lib.fix_bin_contents(dm_som0)
    else:
        dm_som1 = dm_som0

    del dm_som0

    # Override geometry if necessary
    if conf.inst_geom is not None:
        i_geom_dst.setGeometry(data_paths, dp_som1)

    if conf.inst_geom is not None and dm_som1 is not None:
        i_geom_dst.setGeometry(mon_paths, dm_som1)

    # Step 3: Integrate the upstream monitor
    if dm_som1 is not None:
        if conf.verbose:
            print "Integrating upstream monitor spectrum"

        if t is not None:
            t.getTime(False)

        if conf.mon_int_range is None:
            start_val = float("inf")
            end_val = float("inf")
        else:
            start_val = conf.mon_int_range[0]
            end_val = conf.mon_int_range[1]

        dm_som2 = dr_lib.integrate_spectra(dm_som1,
                                           start=start_val,
                                           end=end_val,
                                           width=True)
        if t is not None:
            t.getTime(msg="After integrating upstream monitor spectrum ")
    else:
        dm_som2 = dm_som1

    del dm_som1

    tib_norm_const = None

    # Step 4: Divide data set by summed monitor spectrum
    if dm_som2 is not None:
        if conf.verbose:
            print "Normalizing %s by monitor sum" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som2 = common_lib.div_ncerr(dp_som1, dm_som2, length_one_som=True)

        tib_norm_const = dm_som2[0].y

        if t is not None:
            t.getTime(msg="After normalizing %s by monitor sum" % dataset_type)

    elif conf.pc_norm:
        if conf.verbose:
            print "Normalizing %s by proton charge" % dataset_type

        pc_tag = dataset_type + "-proton_charge"
        pc = dp_som1.attr_list[pc_tag]

        # Scale the proton charge and then set the scale PC back to attributes
        if conf.scale_pc is not None:
            if conf.verbose:
                print "Scaling %s proton charge" % dataset_type

            pc = hlr_utils.scale_proton_charge(pc, conf.scale_pc)
            dp_som1.attr_list[pc_tag] = pc

        tib_norm_const = pc.getValue()

        if t is not None:
            t.getTime(False)

        dp_som2 = common_lib.div_ncerr(dp_som1, (pc.getValue(), 0.0))

        if t is not None:
            t.getTime(msg="After normalizing %s by proton charge" \
                      % dataset_type)

    else:
        dp_som2 = dp_som1

    del dp_som1, dm_som2

    # Step 5: Scale dark current by data set measurement time
    if dkcur is not None:
        if conf.verbose:
            print "Scaling dark current by %s acquisition time" % dataset_type

        if t is not None:
            t.getTime(False)

        dstime_tag = dataset_type + "-duration"
        dstime = dp_som2.attr_list[dstime_tag]

        dkcur1 = common_lib.div_ncerr(dkcur, (dstime.getValue(), 0.0))

        if t is not None:
            t.getTime(msg="After scaling dark current by %s acquisition time" \
                      % dataset_type)
    else:
        dkcur1 = dkcur

    del dkcur

    # Step 6: Subtract scaled dark current from data set
    if dkcur1 is not None:
        if conf.verbose:
            print "Subtracting %s by scaled dark current" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som3 = common_lib.sub_ncerr(dp_som2, dkcur1)

        if t is not None:
            t.getTime(msg="After subtracting %s by scaled dark current" \
                      % dataset_type)
    elif tib_const is not None and dkcur1 is None:
        if conf.verbose:
            print "Subtracting TIB constant from %s" % dataset_type

        # Normalize the TIB constant by dividing by the current normalization
        # the duration (if necessary) and the conversion from seconds to
        # microseconds
        tib_c = tib_const.toValErrTuple()

        conv_sec_to_usec = 1.0e-6

        if tib_norm_const is None:
            tib_norm_const = 1
            duration = 1
        else:
            duration_tag = dataset_type + "-duration"
            duration = dp_som2.attr_list[duration_tag].getValue()

        norm_const = (duration * conv_sec_to_usec) / tib_norm_const

        tib_val = tib_c[0] * norm_const
        tib_err2 = tib_c[1] * (norm_const * norm_const)

        if t is not None:
            t.getTime(False)

        dp_som3 = common_lib.sub_ncerr(dp_som2, (tib_val, tib_err2))

        if t is not None:
            t.getTime(msg="After subtracting TIB constant from %s" \
                      % dataset_type)
    elif conf.tib_range is not None and dkcur1 is None:
        if conf.verbose:
            print "Determining TIB constant from %s" % dataset_type

        if t is not None:
            t.getTime(False)

        TIB = dr_lib.determine_time_indep_bkg(dp_som2,
                                              conf.tib_range,
                                              is_range=True)

        if t is not None:
            t.getTime(msg="After determining TIB constant from %s" \
                      % dataset_type)

        if conf.dump_tib:
            file_comment = "TIB TOF Range: [%d, %d]" % (conf.tib_range[0],
                                                        conf.tib_range[1])

            hlr_utils.write_file(conf.output, "text/num-info", TIB,
                                 output_ext="tib",
                                 extra_tag=dataset_type,
                                 verbose=conf.verbose,
                                 data_ext=conf.ext_replacement,
                                 path_replacement=conf.path_replacement,
                                 message="time-independent background "\
                                 +"information",
                                 tag="Average TIB",
                                 units="counts/usec",
                                 comments=[file_comment])

        if conf.verbose:
            print "Subtracting TIB constant from %s" % dataset_type

        if t is not None:
            t.getTime(False)

        dp_som3 = common_lib.sub_ncerr(dp_som2, TIB)

        if t is not None:
            t.getTime(msg="After subtracting TIB constant from %s" \
                      % dataset_type)

        del TIB
    else:
        dp_som3 = dp_som2

    del dp_som2, dkcur1

    if conf.dump_ctof_comb:
        dp_som3_1 = dr_lib.sum_all_spectra(dp_som3)
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             dp_som3_1,
                             output_ext="ctof",
                             extra_tag=dataset_type,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined calibrated TOF information")

        del dp_som3_1

    return dp_som3
示例#12
0
def process_igs_data(datalist, conf, **kwargs):
    """
    This function combines Steps 1 through 8 of the data reduction process for
    Inverse Geometry Spectrometers as specified by the documents at
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object and
    processes the data accordingly. This function should really only be used in
    the context of I{amorphous_reduction} and I{calc_norm_eff}.

    @param datalist: A list containing the filenames of the data to be
    processed.
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: File object that contains instrument geometry
    information.
    @type inst_geom_dst: C{DST.GeomDST}
    
    @keyword dataset_type: The practical name of the dataset being processed.
    The default value is I{data}.
    @type dataset_type: C{string}
    
    @keyword tib_const: Object providing the time-independent background
    constant to subtract.
    @type tib_const: L{hlr_utils.DrParameter}

    @keyword bkg_som: Object that will be used for early background subtraction
    @type bkg_som: C{SOM.SOM}
    
    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        if kwargs["tib_const"] is not None:
            tib_const = kwargs["tib_const"].toValErrTuple()
        else:
            tib_const = None
    except KeyError:
        tib_const = None

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    try:
        bkg_som = kwargs["bkg_som"]
    except KeyError:
        bkg_som = None

    # Step 1: Open appropriate data files
    if not conf.mc:
        so_axis = "time_of_flight"
    else:
        so_axis = "Time_of_Flight"

    # Add so_axis to Configure object
    conf.so_axis = so_axis

    if conf.verbose:
        print "Reading %s file" % dataset_type

    # Special case handling for normalization data. Dynamically trying to
    # determine if incoming file is a previously calculated one.
    if dataset_type == "normalization":
        try:
            # Check the first incoming file
            dst_type = hlr_utils.file_peeker(datalist[0])
            # If file_peeker succeeds, the DST is different than the function
            # returns
            dst_type = "text/num-info"
            # Let ROI file handle filtering
            data_paths = None
        except RuntimeError:
            # It's a NeXus file
            dst_type = "application/x-NeXus"
            data_paths = conf.data_paths.toPath()
    else:
        dst_type = "application/x-NeXus"
        data_paths = conf.data_paths.toPath()

    # The [0] is to get the data SOM and ignore the None background SOM
    dp_som0 = dr_lib.add_files(datalist,
                               Data_Paths=data_paths,
                               SO_Axis=so_axis,
                               Signal_ROI=conf.roi_file,
                               dataset_type=dataset_type,
                               dst_type=dst_type,
                               Verbose=conf.verbose,
                               Timer=t)

    if t is not None:
        t.getTime(msg="After reading %s " % dataset_type)

    if dst_type == "text/num-info":
        # Since we have a pre-calculated normalization dataset, set the flag
        # and return the SOM now
        conf.pre_norm = True
        # Make the labels and units compatible with a NeXus file based SOM
        dp_som0.setAxisLabel(0, "wavelength")
        dp_som0.setAxisUnits(0, "Angstroms")
        dp_som0.setYUnits("Counts/A")
        return dp_som0
    else:
        if dataset_type == "normalization":
            # Since we have a NeXus file, we need to continue
            conf.pre_norm = False

    # Cut the spectra if necessary
    dp_somA = dr_lib.cut_spectra(dp_som0, conf.tof_cut_min, conf.tof_cut_max)

    del dp_som0

    dp_som1 = dr_lib.fix_bin_contents(dp_somA)

    del dp_somA

    if conf.inst_geom is not None:
        i_geom_dst.setGeometry(conf.data_paths.toPath(), dp_som1)

    if conf.no_mon_norm:
        dm_som1 = None
    else:
        if conf.verbose:
            print "Reading in monitor data from %s file" % dataset_type

        # The [0] is to get the data SOM and ignore the None background SOM
        dm_som0 = dr_lib.add_files(datalist,
                                   Data_Paths=conf.mon_path.toPath(),
                                   SO_Axis=so_axis,
                                   dataset_type=dataset_type,
                                   Verbose=conf.verbose,
                                   Timer=t)

        if t is not None:
            t.getTime(msg="After reading monitor data ")

        dm_som1 = dr_lib.fix_bin_contents(dm_som0)

        del dm_som0

        if conf.inst_geom is not None:
            i_geom_dst.setGeometry(conf.mon_path.toPath(), dm_som1)

    if bkg_som is not None:
        bkg_pcharge = bkg_som.attr_list["background-proton_charge"].getValue()
        data_pcharge = dp_som1.attr_list[dataset_type +
                                         "-proton_charge"].getValue()

        ratio = data_pcharge / bkg_pcharge

        bkg_som1 = common_lib.mult_ncerr(bkg_som, (ratio, 0.0))

        del bkg_som

        dp_som2 = dr_lib.subtract_bkg_from_data(dp_som1,
                                                bkg_som1,
                                                verbose=conf.verbose,
                                                timer=t,
                                                dataset1=dataset_type,
                                                dataset2="background")

    else:
        dp_som2 = dp_som1

    del dp_som1

    # Step 2: Dead Time Correction
    # No dead time correction is being applied to the data yet

    # Step 3: Time-independent background determination
    if conf.verbose and conf.tib_tofs is not None:
        print "Determining time-independent background from data"

    if t is not None and conf.tib_tofs is not None:
        t.getTime(False)

    B = dr_lib.determine_time_indep_bkg(dp_som2, conf.tib_tofs)

    if t is not None and B is not None:
        t.getTime(msg="After determining time-independent background ")

    if conf.dump_tib and B is not None:
        file_comment = "TOFs: %s" % conf.tib_tofs

        hlr_utils.write_file(conf.output, "text/num-info", B,
                             output_ext="tib",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="time-independent background "\
                             +"information",
                             tag="Average",
                             units="counts",
                             comments=[file_comment])

    # Step 4: Subtract time-independent background
    if conf.verbose and B is not None:
        print "Subtracting time-independent background from data"

    if t is not None:
        t.getTime(False)

    if B is not None:
        dp_som3 = common_lib.sub_ncerr(dp_som2, B)
    else:
        dp_som3 = dp_som2

    if B is not None and t is not None:
        t.getTime(msg="After subtracting time-independent background ")

    del dp_som2, B

    # Step 5: Subtract time-independent background constant
    if conf.verbose and tib_const is not None:
        print "Subtracting time-independent background constant from data"

    if t is not None and tib_const is not None:
        t.getTime(False)

    if tib_const is not None:
        dp_som4 = common_lib.sub_ncerr(dp_som3, tib_const)
    else:
        dp_som4 = dp_som3

    if t is not None and tib_const is not None:
        t.getTime(msg="After subtracting time-independent background "\
                  +"constant ")

    del dp_som3

    # Provide override capability for final wavelength, time-zero slope and
    # time-zero offset

    if conf.wavelength_final is not None:
        dp_som4.attr_list["Wavelength_final"] = \
                                     conf.wavelength_final.toValErrTuple()

    # Note: time_zero_slope MUST be a tuple
    if conf.time_zero_slope is not None:
        dp_som4.attr_list["Time_zero_slope"] = \
                                     conf.time_zero_slope.toValErrTuple()
        if dm_som1 is not None:
            dm_som1.attr_list["Time_zero_slope"] = \
                                          conf.time_zero_slope.toValErrTuple()

    # Note: time_zero_offset MUST be a tuple
    if conf.time_zero_offset is not None:
        dp_som4.attr_list["Time_zero_offset"] = \
                                     conf.time_zero_offset.toValErrTuple()
        if dm_som1 is not None:
            dm_som1.attr_list["Time_zero_offset"] = \
                                      conf.time_zero_offset.toValErrTuple()

    # Step 6: Convert TOF to wavelength for data and monitor
    if conf.verbose:
        print "Converting TOF to wavelength"

    if t is not None:
        t.getTime(False)

    # Convert monitor
    if dm_som1 is not None:
        dm_som2 = common_lib.tof_to_wavelength_lin_time_zero(
            dm_som1, units="microsecond")
    else:
        dm_som2 = None

    # Convert detector pixels
    dp_som5 = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(
        dp_som4, units="microsecond", run_filter=conf.filter)

    if t is not None:
        t.getTime(msg="After converting TOF to wavelength ")

    if conf.dump_wave:
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             dp_som5,
                             output_ext="pxl",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="pixel wavelength information")
    if conf.dump_mon_wave and dm_som2 is not None:
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             dm_som2,
                             output_ext="mxl",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="monitor wavelength information")

    del dp_som4, dm_som1

    # Step 7: Efficiency correct monitor
    if conf.verbose and dm_som2 is not None and not conf.no_mon_effc:
        print "Efficiency correct monitor data"

    if t is not None:
        t.getTime(False)

    if not conf.no_mon_effc:
        dm_som3 = dr_lib.feff_correct_mon(dm_som2)
    else:
        dm_som3 = dm_som2

    if t is not None and dm_som2 is not None and not conf.no_mon_effc:
        t.getTime(msg="After efficiency correcting monitor ")

    if conf.dump_mon_effc and not conf.no_mon_effc and dm_som3 is not None:
        hlr_utils.write_file(conf.output, "text/Spec", dm_som3,
                             output_ext="mel",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="monitor wavelength information "\
                             +"(efficiency)")

    del dm_som2

    # Step 8: Rebin monitor axis onto detector pixel axis
    if conf.verbose and dm_som3 is not None:
        print "Rebin monitor axis to detector pixel axis"

    if t is not None:
        t.getTime(False)

    dm_som4 = dr_lib.rebin_monitor(dm_som3, dp_som5)

    if t is not None and dm_som4 is not None:
        t.getTime(msg="After rebinning monitor ")

    del dm_som3

    if conf.dump_mon_rebin and dm_som4 is not None:
        hlr_utils.write_file(conf.output, "text/Spec", dm_som4,
                             output_ext="mrl",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="monitor wavelength information "\
                             +"(rebinned)")

    # The lambda-dependent background is only done on sample data (aka data)
    # for the BSS instrument at the SNS
    if conf.inst == "BSS" and conf.ldb_const is not None and \
           dataset_type == "data":
        # Step 9: Convert chopper center wavelength to TOF center
        if conf.verbose:
            print "Converting chopper center wavelength to TOF"

        if t is not None:
            t.getTime(False)

        tof_center = dr_lib.convert_single_to_list(\
            "initial_wavelength_igs_lin_time_zero_to_tof",
            conf.chopper_lambda_cent.toValErrTuple(), dp_som5)

        # Step 10: Calculate beginning and end of detector TOF spectrum
        if conf.verbose:
            print "Calculating beginning and ending TOF ranges"

        half_inv_chop_freq = 0.5 / conf.chopper_freq.toValErrTuple()[0]
        # Above is in seconds, need microseconds
        half_inv_chop_freq *= 1.0e6

        tof_begin = common_lib.sub_ncerr(tof_center, (half_inv_chop_freq, 0.0))
        tof_end = common_lib.add_ncerr(tof_center, (half_inv_chop_freq, 0.0))

        # Step 11: Convert TOF_begin and TOF_end to wavelength
        if conf.verbose:
            print "Converting TOF_begin and TOF_end to wavelength"

        # Check for time-zero slope information
        try:
            tz_slope = conf.time_zero_slope.toValErrTuple()
        except AttributeError:
            tz_slope = (0.0, 0.0)

        # Check for time-zero offset information
        try:
            tz_offset = conf.time_zero_offset.toValErrTuple()
        except AttributeError:
            tz_offset = (0.0, 0.0)

        l_begin = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(\
            tof_begin, time_zero_slope=tz_slope, time_zero_offset=tz_offset,
            iobj=dp_som5, run_filter=False)
        l_end = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(\
            tof_end, time_zero_slope=tz_slope, time_zero_offset=tz_offset,
            iobj=dp_som5, run_filter=False)

        # Step 12: tof-least-bkg to lambda-least-bkg
        if conf.verbose:
            print "Converting TOF least background to wavelength"

        lambda_least_bkg = dr_lib.convert_single_to_list(\
            "tof_to_initial_wavelength_igs_lin_time_zero",
            conf.tof_least_bkg.toValErrTuple(), dp_som5)

        if t is not None:
            t.getTime(msg="After converting boundary positions ")

        # Step 13: Create lambda-dependent background spectrum
        if conf.verbose:
            print "Creating lambda-dependent background spectra"

        if t is not None:
            t.getTime(False)

        ldb_som = dr_lib.shift_spectrum(dm_som4, lambda_least_bkg, l_begin,
                                        l_end, conf.ldb_const.getValue())

        if t is not None:
            t.getTime(msg="After creating lambda-dependent background "\
                      +"spectra ")

        # Step 14: Subtract lambda-dependent background from sample data
        if conf.verbose:
            print "Subtracting lambda-dependent background from data"

        if t is not None:
            t.getTime(False)

        dp_som6 = common_lib.sub_ncerr(dp_som5, ldb_som)

        if t is not None:
            t.getTime(msg="After subtracting lambda-dependent background "\
                      +"from data ")
    else:
        dp_som6 = dp_som5

    del dp_som5

    # Step 15: Normalize data by monitor
    if conf.verbose and dm_som4 is not None:
        print "Normalizing data by monitor"

    if t is not None:
        t.getTime(False)

    if dm_som4 is not None:
        dp_som7 = common_lib.div_ncerr(dp_som6, dm_som4)

        if t is not None:
            t.getTime(msg="After normalizing data by monitor ")
    else:
        dp_som7 = dp_som6

    if conf.dump_wave_mnorm:
        dp_som7_1 = dr_lib.sum_all_spectra(dp_som7,\
                                   rebin_axis=conf.lambda_bins.toNessiList())

        write_message = "combined pixel wavelength information"
        if dm_som4 is not None:
            write_message += " (monitor normalized)"

        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             dp_som7_1,
                             output_ext="pml",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message=write_message)
        del dp_som7_1

    del dm_som4, dp_som6

    return dp_som7
def run(config, tim=None):
    """
    This method is where the data reduction process gets done.

    @param config: Object containing the data reduction configuration
                   information.
    @type config: L{hlr_utils.Configure}

    @param tim: (OPTIONAL) Object that will allow the method to perform
                           timing evaluations.
    @type tim: C{sns_time.DiffTime}
    """
    import common_lib
    import dr_lib
    import DST

    if tim is not None:
        tim.getTime(False)
        old_time = tim.getOldTime()

    if config.data is None:
        raise RuntimeError("Need to pass a data filename to the driver "\
                           +"script.")

    # Read in geometry if one is provided
    if config.inst_geom is not None:
        if config.verbose:
            print "Reading in instrument geometry file"

        inst_geom_dst = DST.getInstance("application/x-NxsGeom",
                                        config.inst_geom)
    else:
        inst_geom_dst = None

    # Perform early background subtraction if the hwfix flag is used
    if config.hwfix:
        if not config.mc:
            so_axis = "time_of_flight"
        else:
            so_axis = "Time_of_Flight"

        bkg_som0 = dr_lib.add_files(config.back,
                                    Data_Paths=config.data_paths.toPath(),
                                    SO_Axis=so_axis,
                                    Signal_ROI=config.roi_file,
                                    dataset_type="background",
                                    Verbose=config.verbose,
                                    Timer=tim)

        bkg_som = dr_lib.fix_bin_contents(bkg_som0)
        del bkg_som0
    else:
        bkg_som = None

    # Perform Steps 1-15 on sample data
    d_som1 = dr_lib.process_igs_data(config.data,
                                     config,
                                     timer=tim,
                                     inst_geom_dst=inst_geom_dst,
                                     tib_const=config.tib_data_const,
                                     bkg_som=bkg_som)

    # Perform Steps 1-15 on empty can data
    if config.ecan is not None:
        e_som1 = dr_lib.process_igs_data(config.ecan,
                                         config,
                                         timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="empty_can",
                                         tib_const=config.tib_ecan_const,
                                         bkg_som=bkg_som)
    else:
        e_som1 = None

    # Perform Steps 1-15 on normalization data
    if config.norm is not None:
        n_som1 = dr_lib.process_igs_data(config.norm,
                                         config,
                                         timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="normalization",
                                         tib_const=config.tib_norm_const,
                                         bkg_som=bkg_som)
    else:
        n_som1 = None

    # Perform Steps 1-15 on background data
    if config.back is not None:
        b_som1 = dr_lib.process_igs_data(config.back,
                                         config,
                                         timer=tim,
                                         inst_geom_dst=inst_geom_dst,
                                         dataset_type="background",
                                         tib_const=config.tib_back_const,
                                         bkg_som=bkg_som)
    else:
        b_som1 = None

    # Perform Step 1-15 on direct scattering background data
    if config.dsback is not None:
        ds_som1 = dr_lib.process_igs_data(config.dsback,
                                          config,
                                          timer=tim,
                                          inst_geom_dst=inst_geom_dst,
                                          tib_const=config.tib_dsback_const,
                                          dataset_type="dsbackground",
                                          bkg_som=bkg_som)

        # Note: time_zero_slope MUST be a tuple
        if config.time_zero_slope is not None:
            ds_som1.attr_list["Time_zero_slope"] = \
                                      config.time_zero_slope.toValErrTuple()

        # Note: time_zero_offset MUST be a tuple
        if config.time_zero_offset is not None:
            ds_som1.attr_list["Time_zero_offset"] = \
                                      config.time_zero_offset.toValErrTuple()

        # Step 16: Linearly interpolate TOF elastic range in direct scattering
        #          background data

        # First convert TOF elastic range to appropriate pixel initial
        # wavelengths
        if config.verbose:
            print "Determining initial wavelength range for elastic line"

        if tim is not None:
            tim.getTime(False)

        if config.tof_elastic is None:
            # Units are in microseconds
            tof_elastic_range = (140300, 141300)
        else:
            tof_elastic_range = config.tof_elastic

        ctof_elastic_low = dr_lib.convert_single_to_list(\
               "tof_to_initial_wavelength_igs_lin_time_zero",
               (tof_elastic_range[0], 0.0),
               ds_som1)

        ctof_elastic_high = dr_lib.convert_single_to_list(\
               "tof_to_initial_wavelength_igs_lin_time_zero",
               (tof_elastic_range[1], 0.0),
               ds_som1)

        ctof_elastic_range = [(ctof_elastic_low[i][0], ctof_elastic_high[i][0])
                              for i in xrange(len(ctof_elastic_low))]

        if tim is not None:
            tim.getTime(msg="After calculating initial wavelength range for "\
                        +"elastic line ")

        del ctof_elastic_low, ctof_elastic_high

        if config.split:
            lambda_filter = [(d_som1[i].axis[0].val[0],
                              d_som1[i].axis[0].val[-1])
                             for i in xrange(len(d_som1))]
        else:
            lambda_filter = None

        # Now interpolate spectra between TOF elastic range (converted to
        # initial wavelength)
        if config.verbose:
            print "Linearly interpolating direct scattering spectra"

        if tim is not None:
            tim.getTime(False)

        ds_som2 = dr_lib.lin_interpolate_spectra(ds_som1,
                                                 ctof_elastic_range,
                                                 filter_axis=lambda_filter)

        if tim is not None:
            tim.getTime(msg="After linearly interpolating direct scattering "\
                        +"spectra ")

        if config.dump_dslin:
            ds_som2_1 = dr_lib.sum_all_spectra(ds_som2,\
                                  rebin_axis=config.lambda_bins.toNessiList())

            hlr_utils.write_file(config.output,
                                 "text/Spec",
                                 ds_som2_1,
                                 output_ext="lin",
                                 data_ext=config.ext_replacement,
                                 path_replacement=config.path_replacement,
                                 verbose=config.verbose,
                                 message="dsbackground linear interpolation")
            del ds_som2_1

        del ds_som1
    else:
        ds_som2 = None

    if inst_geom_dst is not None:
        inst_geom_dst.release_resource()

    # Steps 17-18: Subtract background spectrum from sample spectrum
    if config.dsback is None:
        back_som = b_som1
        bkg_type = "background"
    else:
        back_som = ds_som2
        bkg_type = "dsbackground"
    d_som2 = dr_lib.subtract_bkg_from_data(d_som1,
                                           back_som,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data",
                                           dataset2=bkg_type,
                                           scale=config.scale_bs)

    if config.dsback is not None:
        del ds_som2

    # Step 19: Zero region outside TOF elastic for background for empty can
    if config.dsback is None:
        bcs_som = b_som1
        cs_som = e_som1
    else:
        if config.verbose and b_som1 is not None:
            print "Zeroing background spectra"

        if tim is not None and b_som1 is not None:
            tim.getTime(False)

        bcs_som = dr_lib.zero_spectra(b_som1, ctof_elastic_range)

        if tim is not None and b_som1 is not None:
            tim.getTime(msg="After zeroing background spectra")

        if config.verbose and e_som1 is not None:
            print "Zeroing empty can spectra"

        if tim is not None and e_som1 is not None:
            tim.getTime(False)

        cs_som = dr_lib.zero_spectra(e_som1, ctof_elastic_range)

        if tim is not None and e_som1 is not None:
            tim.getTime(msg="After zeroing empty can spectra")

        del ctof_elastic_range

    # Steps 20-21: Subtract background spectrum from empty can spectrum
    e_som2 = dr_lib.subtract_bkg_from_data(cs_som,
                                           bcs_som,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data-empty_can",
                                           dataset2="background",
                                           scale=config.scale_bcs)

    # Steps 22-23: Subtract background spectrum from empty can spectrum for
    #              normalization

    try:
        config.pre_norm
    except AttributeError:
        config.pre_norm = False

    if not config.pre_norm:
        e_som3 = dr_lib.subtract_bkg_from_data(e_som1,
                                               b_som1,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="norm-empty_can",
                                               dataset2="background",
                                               scale=config.scale_bcn)
    else:
        e_som3 = None

    # Steps 24-25: Subtract background spectrum from normalization spectrum
    if not config.pre_norm:
        n_som2 = dr_lib.subtract_bkg_from_data(n_som1,
                                               b_som1,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="normalization",
                                               dataset2="background",
                                               scale=config.scale_bn)
    else:
        n_som2 = n_som1

    del b_som1, e_som1, bcs_som, cs_som

    # Steps 26-27: Subtract empty can spectrum from sample spectrum
    d_som3 = dr_lib.subtract_bkg_from_data(d_som2,
                                           e_som2,
                                           verbose=config.verbose,
                                           timer=tim,
                                           dataset1="data",
                                           dataset2="empty_can",
                                           scale=config.scale_cs)

    del d_som2, e_som2

    # Steps 28-29: Subtract empty can spectrum from normalization spectrum
    if not config.pre_norm:
        n_som3 = dr_lib.subtract_bkg_from_data(n_som2,
                                               e_som3,
                                               verbose=config.verbose,
                                               timer=tim,
                                               dataset1="normalization",
                                               dataset2="empty_can",
                                               scale=config.scale_cn)
    else:
        n_som3 = n_som2

    del n_som2, e_som3

    # Step 30-31: Integrate normalization spectra
    if config.verbose and n_som3 is not None and not config.pre_norm:
        print "Integrating normalization spectra"

    if not config.pre_norm:
        norm_int = dr_lib.integrate_spectra(n_som3,
                                            start=config.norm_start,
                                            end=config.norm_end,
                                            norm=True)
    else:
        norm_int = n_som3

    del n_som3

    # Step 32: Normalize data by integrated values
    if config.verbose and norm_int is not None:
        print "Normalizing data by normalization data"

    if norm_int is not None:
        d_som4 = common_lib.div_ncerr(d_som3, norm_int)
    else:
        d_som4 = d_som3

    if norm_int is not None:
        if tim is not None:
            tim.getTime(msg="After normalizing data ")

    del d_som3, norm_int

    if config.dump_norm:
        if tim is not None:
            tim.getTime(False)

        hlr_utils.write_file(config.output,
                             "text/Spec",
                             d_som4,
                             output_ext="wvn",
                             data_ext=config.ext_replacement,
                             path_replacement=config.path_replacement,
                             verbose=config.verbose,
                             message="wavelength (vanadium norm) information")

        if tim is not None:
            tim.getTime(msg="After writing wavelength (vanadium norm) info ")

    # Steps 33 to end: Creating S(Q,E)
    if config.Q_bins is not None:
        if config.verbose:
            print "Creating 2D spectrum"

        if tim is not None:
            tim.getTime(False)

        d_som5 = dr_lib.create_E_vs_Q_igs(
            d_som4,
            config.E_bins.toNessiList(),
            config.Q_bins.toNessiList(),
            so_id="Full Detector",
            y_label="counts",
            y_units="counts / (ueV * A^-1)",
            x_labels=["Q transfer", "energy transfer"],
            x_units=["1/Angstroms", "ueV"],
            split=config.split,
            Q_filter=False,
            configure=config)
        if tim is not None:
            tim.getTime(msg="After creation of final spectrum ")

        del d_som4

    # Steps 33 to 36: Create S(-cos(polar), E)
    elif config.ncospol_bins is not None:
        if config.verbose:
            print "Convert wavelength to energy transfer"

        if tim is not None:
            tim.getTime(False)

        d_som4a = dr_lib.energy_transfer(d_som4,
                                         "IGS",
                                         "Wavelength_final",
                                         sa_norm=True,
                                         scale=True,
                                         change_units=True)

        if tim is not None:
            tim.getTime(msg="After wavelength to energy transfer conversion ")

        del d_som4

        if config.verbose:
            print "Creating 2D spectrum"

        if tim is not None:
            tim.getTime(False)

        d_som5 = dr_lib.create_param_vs_Y(
            d_som4a,
            "polar",
            "negcos_param_array",
            config.ncospol_bins.toNessiList(),
            rebin_axis=config.E_bins.toNessiList(),
            y_label="counts",
            y_units="counts / ueV",
            x_labels=["-cos(polar)", "Energy Transfer"],
            x_units=["", "ueV"])

        if tim is not None:
            tim.getTime(msg="After creation of final spectrum ")

    # If rescaling factor present, rescale the data
    if config.rescale_final is not None and not config.split:
        d_som6 = common_lib.mult_ncerr(d_som5, (config.rescale_final, 0.0))
    else:
        d_som6 = d_som5

    if tim is None:
        old_time = None

    if not __name__ == "amorphous_reduction_sqe":
        del d_som5
        __write_output(d_som6, config, tim, old_time)
    else:
        if config.create_output:
            del d_som5
            __write_output(d_som6, config, tim, old_time)
        else:
            return d_som6
示例#14
0
def process_igs_data(datalist, conf, **kwargs):
    """
    This function combines Steps 1 through 8 of the data reduction process for
    Inverse Geometry Spectrometers as specified by the documents at
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object and
    processes the data accordingly. This function should really only be used in
    the context of I{amorphous_reduction} and I{calc_norm_eff}.

    @param datalist: A list containing the filenames of the data to be
    processed.
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: File object that contains instrument geometry
    information.
    @type inst_geom_dst: C{DST.GeomDST}
    
    @keyword dataset_type: The practical name of the dataset being processed.
    The default value is I{data}.
    @type dataset_type: C{string}
    
    @keyword tib_const: Object providing the time-independent background
    constant to subtract.
    @type tib_const: L{hlr_utils.DrParameter}

    @keyword bkg_som: Object that will be used for early background subtraction
    @type bkg_som: C{SOM.SOM}
    
    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        if kwargs["tib_const"] is not None:
            tib_const = kwargs["tib_const"].toValErrTuple()
        else:
            tib_const = None
    except KeyError:
        tib_const = None

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    try:
        bkg_som = kwargs["bkg_som"]
    except KeyError:
        bkg_som = None

    # Step 1: Open appropriate data files
    if not conf.mc:
        so_axis = "time_of_flight"
    else:
        so_axis = "Time_of_Flight"

    # Add so_axis to Configure object
    conf.so_axis = so_axis

    if conf.verbose:
        print "Reading %s file" % dataset_type

    # Special case handling for normalization data. Dynamically trying to
    # determine if incoming file is a previously calculated one.
    if dataset_type == "normalization":
        try:
            # Check the first incoming file
            dst_type = hlr_utils.file_peeker(datalist[0])
            # If file_peeker succeeds, the DST is different than the function
            # returns
            dst_type = "text/num-info"
            # Let ROI file handle filtering
            data_paths = None
        except RuntimeError:
            # It's a NeXus file
            dst_type = "application/x-NeXus"
            data_paths = conf.data_paths.toPath()
    else:
        dst_type = "application/x-NeXus"
        data_paths = conf.data_paths.toPath()

    # The [0] is to get the data SOM and ignore the None background SOM
    dp_som0 = dr_lib.add_files(
        datalist,
        Data_Paths=data_paths,
        SO_Axis=so_axis,
        Signal_ROI=conf.roi_file,
        dataset_type=dataset_type,
        dst_type=dst_type,
        Verbose=conf.verbose,
        Timer=t,
    )

    if t is not None:
        t.getTime(msg="After reading %s " % dataset_type)

    if dst_type == "text/num-info":
        # Since we have a pre-calculated normalization dataset, set the flag
        # and return the SOM now
        conf.pre_norm = True
        # Make the labels and units compatible with a NeXus file based SOM
        dp_som0.setAxisLabel(0, "wavelength")
        dp_som0.setAxisUnits(0, "Angstroms")
        dp_som0.setYUnits("Counts/A")
        return dp_som0
    else:
        if dataset_type == "normalization":
            # Since we have a NeXus file, we need to continue
            conf.pre_norm = False

    # Cut the spectra if necessary
    dp_somA = dr_lib.cut_spectra(dp_som0, conf.tof_cut_min, conf.tof_cut_max)

    del dp_som0

    dp_som1 = dr_lib.fix_bin_contents(dp_somA)

    del dp_somA

    if conf.inst_geom is not None:
        i_geom_dst.setGeometry(conf.data_paths.toPath(), dp_som1)

    if conf.no_mon_norm:
        dm_som1 = None
    else:
        if conf.verbose:
            print "Reading in monitor data from %s file" % dataset_type

        # The [0] is to get the data SOM and ignore the None background SOM
        dm_som0 = dr_lib.add_files(
            datalist,
            Data_Paths=conf.mon_path.toPath(),
            SO_Axis=so_axis,
            dataset_type=dataset_type,
            Verbose=conf.verbose,
            Timer=t,
        )

        if t is not None:
            t.getTime(msg="After reading monitor data ")

        dm_som1 = dr_lib.fix_bin_contents(dm_som0)

        del dm_som0

        if conf.inst_geom is not None:
            i_geom_dst.setGeometry(conf.mon_path.toPath(), dm_som1)

    if bkg_som is not None:
        bkg_pcharge = bkg_som.attr_list["background-proton_charge"].getValue()
        data_pcharge = dp_som1.attr_list[dataset_type + "-proton_charge"].getValue()

        ratio = data_pcharge / bkg_pcharge

        bkg_som1 = common_lib.mult_ncerr(bkg_som, (ratio, 0.0))

        del bkg_som

        dp_som2 = dr_lib.subtract_bkg_from_data(
            dp_som1, bkg_som1, verbose=conf.verbose, timer=t, dataset1=dataset_type, dataset2="background"
        )

    else:
        dp_som2 = dp_som1

    del dp_som1

    # Step 2: Dead Time Correction
    # No dead time correction is being applied to the data yet

    # Step 3: Time-independent background determination
    if conf.verbose and conf.tib_tofs is not None:
        print "Determining time-independent background from data"

    if t is not None and conf.tib_tofs is not None:
        t.getTime(False)

    B = dr_lib.determine_time_indep_bkg(dp_som2, conf.tib_tofs)

    if t is not None and B is not None:
        t.getTime(msg="After determining time-independent background ")

    if conf.dump_tib and B is not None:
        file_comment = "TOFs: %s" % conf.tib_tofs

        hlr_utils.write_file(
            conf.output,
            "text/num-info",
            B,
            output_ext="tib",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message="time-independent background " + "information",
            tag="Average",
            units="counts",
            comments=[file_comment],
        )

    # Step 4: Subtract time-independent background
    if conf.verbose and B is not None:
        print "Subtracting time-independent background from data"

    if t is not None:
        t.getTime(False)

    if B is not None:
        dp_som3 = common_lib.sub_ncerr(dp_som2, B)
    else:
        dp_som3 = dp_som2

    if B is not None and t is not None:
        t.getTime(msg="After subtracting time-independent background ")

    del dp_som2, B

    # Step 5: Subtract time-independent background constant
    if conf.verbose and tib_const is not None:
        print "Subtracting time-independent background constant from data"

    if t is not None and tib_const is not None:
        t.getTime(False)

    if tib_const is not None:
        dp_som4 = common_lib.sub_ncerr(dp_som3, tib_const)
    else:
        dp_som4 = dp_som3

    if t is not None and tib_const is not None:
        t.getTime(msg="After subtracting time-independent background " + "constant ")

    del dp_som3

    # Provide override capability for final wavelength, time-zero slope and
    # time-zero offset

    if conf.wavelength_final is not None:
        dp_som4.attr_list["Wavelength_final"] = conf.wavelength_final.toValErrTuple()

    # Note: time_zero_slope MUST be a tuple
    if conf.time_zero_slope is not None:
        dp_som4.attr_list["Time_zero_slope"] = conf.time_zero_slope.toValErrTuple()
        if dm_som1 is not None:
            dm_som1.attr_list["Time_zero_slope"] = conf.time_zero_slope.toValErrTuple()

    # Note: time_zero_offset MUST be a tuple
    if conf.time_zero_offset is not None:
        dp_som4.attr_list["Time_zero_offset"] = conf.time_zero_offset.toValErrTuple()
        if dm_som1 is not None:
            dm_som1.attr_list["Time_zero_offset"] = conf.time_zero_offset.toValErrTuple()

    # Step 6: Convert TOF to wavelength for data and monitor
    if conf.verbose:
        print "Converting TOF to wavelength"

    if t is not None:
        t.getTime(False)

    # Convert monitor
    if dm_som1 is not None:
        dm_som2 = common_lib.tof_to_wavelength_lin_time_zero(dm_som1, units="microsecond")
    else:
        dm_som2 = None

    # Convert detector pixels
    dp_som5 = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(
        dp_som4, units="microsecond", run_filter=conf.filter
    )

    if t is not None:
        t.getTime(msg="After converting TOF to wavelength ")

    if conf.dump_wave:
        hlr_utils.write_file(
            conf.output,
            "text/Spec",
            dp_som5,
            output_ext="pxl",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message="pixel wavelength information",
        )
    if conf.dump_mon_wave and dm_som2 is not None:
        hlr_utils.write_file(
            conf.output,
            "text/Spec",
            dm_som2,
            output_ext="mxl",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message="monitor wavelength information",
        )

    del dp_som4, dm_som1

    # Step 7: Efficiency correct monitor
    if conf.verbose and dm_som2 is not None and not conf.no_mon_effc:
        print "Efficiency correct monitor data"

    if t is not None:
        t.getTime(False)

    if not conf.no_mon_effc:
        dm_som3 = dr_lib.feff_correct_mon(dm_som2)
    else:
        dm_som3 = dm_som2

    if t is not None and dm_som2 is not None and not conf.no_mon_effc:
        t.getTime(msg="After efficiency correcting monitor ")

    if conf.dump_mon_effc and not conf.no_mon_effc and dm_som3 is not None:
        hlr_utils.write_file(
            conf.output,
            "text/Spec",
            dm_som3,
            output_ext="mel",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message="monitor wavelength information " + "(efficiency)",
        )

    del dm_som2

    # Step 8: Rebin monitor axis onto detector pixel axis
    if conf.verbose and dm_som3 is not None:
        print "Rebin monitor axis to detector pixel axis"

    if t is not None:
        t.getTime(False)

    dm_som4 = dr_lib.rebin_monitor(dm_som3, dp_som5)

    if t is not None and dm_som4 is not None:
        t.getTime(msg="After rebinning monitor ")

    del dm_som3

    if conf.dump_mon_rebin and dm_som4 is not None:
        hlr_utils.write_file(
            conf.output,
            "text/Spec",
            dm_som4,
            output_ext="mrl",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message="monitor wavelength information " + "(rebinned)",
        )

    # The lambda-dependent background is only done on sample data (aka data)
    # for the BSS instrument at the SNS
    if conf.inst == "BSS" and conf.ldb_const is not None and dataset_type == "data":
        # Step 9: Convert chopper center wavelength to TOF center
        if conf.verbose:
            print "Converting chopper center wavelength to TOF"

        if t is not None:
            t.getTime(False)

        tof_center = dr_lib.convert_single_to_list(
            "initial_wavelength_igs_lin_time_zero_to_tof", conf.chopper_lambda_cent.toValErrTuple(), dp_som5
        )

        # Step 10: Calculate beginning and end of detector TOF spectrum
        if conf.verbose:
            print "Calculating beginning and ending TOF ranges"

        half_inv_chop_freq = 0.5 / conf.chopper_freq.toValErrTuple()[0]
        # Above is in seconds, need microseconds
        half_inv_chop_freq *= 1.0e6

        tof_begin = common_lib.sub_ncerr(tof_center, (half_inv_chop_freq, 0.0))
        tof_end = common_lib.add_ncerr(tof_center, (half_inv_chop_freq, 0.0))

        # Step 11: Convert TOF_begin and TOF_end to wavelength
        if conf.verbose:
            print "Converting TOF_begin and TOF_end to wavelength"

        # Check for time-zero slope information
        try:
            tz_slope = conf.time_zero_slope.toValErrTuple()
        except AttributeError:
            tz_slope = (0.0, 0.0)

        # Check for time-zero offset information
        try:
            tz_offset = conf.time_zero_offset.toValErrTuple()
        except AttributeError:
            tz_offset = (0.0, 0.0)

        l_begin = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(
            tof_begin, time_zero_slope=tz_slope, time_zero_offset=tz_offset, iobj=dp_som5, run_filter=False
        )
        l_end = common_lib.tof_to_initial_wavelength_igs_lin_time_zero(
            tof_end, time_zero_slope=tz_slope, time_zero_offset=tz_offset, iobj=dp_som5, run_filter=False
        )

        # Step 12: tof-least-bkg to lambda-least-bkg
        if conf.verbose:
            print "Converting TOF least background to wavelength"

        lambda_least_bkg = dr_lib.convert_single_to_list(
            "tof_to_initial_wavelength_igs_lin_time_zero", conf.tof_least_bkg.toValErrTuple(), dp_som5
        )

        if t is not None:
            t.getTime(msg="After converting boundary positions ")

        # Step 13: Create lambda-dependent background spectrum
        if conf.verbose:
            print "Creating lambda-dependent background spectra"

        if t is not None:
            t.getTime(False)

        ldb_som = dr_lib.shift_spectrum(dm_som4, lambda_least_bkg, l_begin, l_end, conf.ldb_const.getValue())

        if t is not None:
            t.getTime(msg="After creating lambda-dependent background " + "spectra ")

        # Step 14: Subtract lambda-dependent background from sample data
        if conf.verbose:
            print "Subtracting lambda-dependent background from data"

        if t is not None:
            t.getTime(False)

        dp_som6 = common_lib.sub_ncerr(dp_som5, ldb_som)

        if t is not None:
            t.getTime(msg="After subtracting lambda-dependent background " + "from data ")
    else:
        dp_som6 = dp_som5

    del dp_som5

    # Step 15: Normalize data by monitor
    if conf.verbose and dm_som4 is not None:
        print "Normalizing data by monitor"

    if t is not None:
        t.getTime(False)

    if dm_som4 is not None:
        dp_som7 = common_lib.div_ncerr(dp_som6, dm_som4)

        if t is not None:
            t.getTime(msg="After normalizing data by monitor ")
    else:
        dp_som7 = dp_som6

    if conf.dump_wave_mnorm:
        dp_som7_1 = dr_lib.sum_all_spectra(dp_som7, rebin_axis=conf.lambda_bins.toNessiList())

        write_message = "combined pixel wavelength information"
        if dm_som4 is not None:
            write_message += " (monitor normalized)"

        hlr_utils.write_file(
            conf.output,
            "text/Spec",
            dp_som7_1,
            output_ext="pml",
            extra_tag=dataset_type,
            verbose=conf.verbose,
            data_ext=conf.ext_replacement,
            path_replacement=conf.path_replacement,
            message=write_message,
        )
        del dp_som7_1

    del dm_som4, dp_som6

    return dp_som7
示例#15
0
def process_ref_data(datalist,
                     conf,
                     signal_roi_file,
                     bkg_roi_file=None,
                     no_bkg=False,
                     **kwargs):
    """
    This function combines Steps 1 through 6 in section 2.4.5 of the data
    reduction process for Reflectometers (without Monitors) as specified by
    the document at
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a list of file names, a L{hlr_utils.Configure} object,
    signal and background region-of-interest (ROI) files and an optional flag
    about background subtraction and processes the data accordingly.
    
    @param datalist: The filenames of the data to be processed
    @type datalist: C{list} of C{string}s
    
    @param conf: Object that contains the current setup of the driver
    @type conf: L{hlr_utils.Configure}
    
    @param signal_roi_file: The file containing the list of pixel IDs for the
                            signal region of interest.
    @type signal_roi_file: C{string}

    @param bkg_roi_file: The file containing the list of pixel IDs for the
                         (possible) background region of interest.
    @type bkg_roi_file: C{string}    
    
    @param no_bkg: (OPTIONAL) Flag which determines if the background will be
                              calculated and subtracted.
    @type no_bkg: C{boolean}
    
    @param kwargs: A list of keyword arguments that the function accepts:
    
    @keyword inst_geom_dst: Object that contains the instrument geometry
                            information.
    @type inst_geom_dst: C{DST.getInstance()}
    
    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword tof_cuts: Time-of-flight bins to remove (zero) from the data
    @type tof_cuts: C{list} of C{string}s

    @keyword no_tof_cuts: Flag to stop application of the TOF cuts
    @type no_tof_cuts: C{boolean}
    
    @keyword timer:  Timing object so the function can perform timing
                     estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    if dataset_type != "data" and dataset_type != "norm":
        raise RuntimeError("Please use data or norm to specify the dataset "\
                           +"type. Do not understand how to handle %s." \
                           % dataset_type)

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    try:
        i_geom_dst = kwargs["inst_geom_dst"]
    except KeyError:
        i_geom_dst = None

    try:
        tof_cuts = kwargs["tof_cuts"]
    except KeyError:
        tof_cuts = None

    no_tof_cuts = kwargs.get("no_tof_cuts", False)

    so_axis = "time_of_flight"

    # Step 0: Open data files and select signal (and possible background) ROIs
    if conf.verbose:
        print "Reading %s file" % dataset_type

    if len(conf.norm_data_paths) and dataset_type == "norm":
        data_path = conf.norm_data_paths.toPath()
    else:
        data_path = conf.data_paths.toPath()

    (d_som1, b_som1) = dr_lib.add_files_bg(datalist,
                                           Data_Paths=data_path,
                                           SO_Axis=so_axis,
                                           dataset_type=dataset_type,
                                           Signal_ROI=signal_roi_file,
                                           Bkg_ROI=bkg_roi_file,
                                           Verbose=conf.verbose,
                                           Timer=t)

    if t is not None:
        t.getTime(msg="After reading %s " % dataset_type)

    if i_geom_dst is not None:
        i_geom_dst.setGeometry(conf.data_paths.toPath(), d_som1)

    # Calculate delta t over t
    if conf.verbose:
        print "Calculating delta t over t"

    dtot = dr_lib.calc_deltat_over_t(d_som1[0].axis[0].val)

    # Calculate delta theta over theta
    if conf.verbose:
        print "Calculating delta theta over theta"

    dr_lib.calc_delta_theta_over_theta(d_som1, dataset_type)

    # Step 1: Sum all spectra along the low resolution direction

    # Set sorting
    (y_sort, cent_pixel) = hlr_utils.get_ref_integration_direction(
        conf.int_dir, conf.inst, d_som1.attr_list.instrument)
    if dataset_type == "data":
        d_som1.attr_list["ref_sort"] = y_sort

    d_som1A = dr_lib.sum_all_spectra(d_som1,
                                     y_sort=y_sort,
                                     stripe=True,
                                     pixel_fix=cent_pixel)

    del d_som1

    if b_som1 is not None:
        b_som1A = dr_lib.sum_all_spectra(b_som1,
                                         y_sort=y_sort,
                                         stripe=True,
                                         pixel_fix=cent_pixel)
        del b_som1
    else:
        b_som1A = b_som1

    # Set the TOF cuts
    if no_tof_cuts:
        tof_cut_min = None
        tof_cut_max = None
    else:
        tof_cut_min = conf.tof_cut_min
        tof_cut_max = conf.tof_cut_max

    # Cut the spectra if necessary
    d_som2 = dr_lib.cut_spectra(d_som1A, tof_cut_min, tof_cut_max)

    del d_som1A

    if b_som1A is not None:
        b_som2 = dr_lib.cut_spectra(b_som1A, tof_cut_min, tof_cut_max)
        del b_som1A
    else:
        b_som2 = b_som1A

    # Fix TOF cuts to make them list of integers
    try:
        tof_cuts = [int(x) for x in tof_cuts]
    # This will trigger if tof_cuts is None
    except TypeError:
        pass

    d_som3 = dr_lib.zero_bins(d_som2, tof_cuts)

    del d_som2

    if b_som2 is not None:
        b_som3 = dr_lib.zero_bins(b_som2, tof_cuts)

        del b_som2
    else:
        b_som3 = b_som2

    if conf.dump_specular:
        if no_tof_cuts:
            d_som3_1 = dr_lib.cut_spectra(d_som3, conf.tof_cut_min,
                                          conf.tof_cut_max)
        else:
            d_som3_1 = d_som3
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             d_som3_1,
                             output_ext="sdc",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="specular TOF information")
        del d_som3_1

    # Steps 2-4: Determine background spectrum
    if conf.verbose and not no_bkg:
        print "Determining %s background" % dataset_type

    if dataset_type == "data":
        peak_excl = conf.data_peak_excl
    elif dataset_type == "norm":
        peak_excl = conf.norm_peak_excl

    if b_som3 is not None:
        B = dr_lib.calculate_ref_background(b_som3,
                                            no_bkg,
                                            conf.inst,
                                            None,
                                            aobj=d_som3)
    else:
        B = dr_lib.calculate_ref_background(d_som3, no_bkg, conf.inst,
                                            peak_excl)

    if t is not None:
        t.getTime(msg="After background determination")

    if not no_bkg and conf.dump_bkg:
        if no_tof_cuts:
            B_1 = dr_lib.cut_spectra(B, conf.tof_cut_min, conf.tof_cut_max)
        else:
            B_1 = B
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             B_1,
                             output_ext="bkg",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="background TOF information")
        del B_1

    # Step 5: Subtract background spectrum from data spectra
    if not no_bkg:
        d_som4 = dr_lib.subtract_bkg_from_data(d_som3,
                                               B,
                                               verbose=conf.verbose,
                                               timer=t,
                                               dataset1="data",
                                               dataset2="background")
    else:
        d_som4 = d_som3

    del d_som3

    if not no_bkg and conf.dump_sub:
        if no_tof_cuts:
            d_som4_1 = dr_lib.cut_spectra(d_som4, conf.tof_cut_min,
                                          conf.tof_cut_max)
        else:
            d_som4_1 = d_som4
        hlr_utils.write_file(conf.output,
                             "text/Spec",
                             d_som4_1,
                             output_ext="sub",
                             extra_tag=dataset_type,
                             verbose=conf.verbose,
                             data_ext=conf.ext_replacement,
                             path_replacement=conf.path_replacement,
                             message="subtracted TOF information")
        del d_som4_1

    dtot_int = dr_lib.integrate_axis_py(dtot, avg=True)
    param_key = dataset_type + "-dt_over_t"
    d_som4.attr_list[param_key] = dtot_int[0]

    if conf.store_dtot:
        d_som4.attr_list["extra_som"] = dtot

    # Step 6: Scale by proton charge
    pc = d_som4.attr_list[dataset_type + "-proton_charge"]
    pc_new = hlr_utils.scale_proton_charge(pc, "C")
    d_som5 = common_lib.div_ncerr(d_som4, (pc_new.getValue(), 0.0))

    del d_som4

    return d_som5
示例#16
0
def process_dgs_data(obj, conf, bcan, ecan, tcoeff, **kwargs):
    """
    This function combines Steps 7 through 16 in Section 2.1.1 of the data
    reduction process for Direct Geometry Spectrometers as specified by the
    document at 
    U{http://neutrons.ornl.gov/asg/projects/SCL/reqspec/DR_Lib_RS.doc}. The
    function takes a calibrated dataset, a L{hlr_utils.Configure} object and
    processes the data accordingly.

    @param obj: A calibrated dataset object.
    @type obj: C{SOM.SOM}

    @param conf: Object that contains the current setup of the driver.
    @type conf: L{hlr_utils.Configure}

    @param bcan: The object containing the black can data.
    @type bcan: C{SOM.SOM}

    @param ecan: The object containing the empty can data.
    @type ecan: C{SOM.SOM}

    @param tcoeff: The transmission coefficient appropriate to the given data
                   set.
    @type tcoeff: C{tuple}
    
    @param kwargs: A list of keyword arguments that the function accepts:

    @keyword dataset_type: The practical name of the dataset being processed.
                           The default value is I{data}.
    @type dataset_type: C{string}

    @keyword cwp_used: A flag signalling the use of the chopper phase
                       corrections.
    @type cwp_used: C{bool}

    @keyword timer: Timing object so the function can perform timing estimates.
    @type timer: C{sns_timer.DiffTime}


    @return: Object that has undergone all requested processing steps
    @rtype: C{SOM.SOM}
    """
    import array_manip
    import common_lib
    import dr_lib
    import hlr_utils

    # Check keywords
    try:
        dataset_type = kwargs["dataset_type"]
    except KeyError:
        dataset_type = "data"

    try:
        t = kwargs["timer"]
    except KeyError:
        t = None

    cwp_used = kwargs.get("cwp_used", False)
        
    if conf.verbose:
        print "Processing %s information" % dataset_type

    # Step 7: Create black can background contribution
    if bcan is not None:
        if conf.verbose:
            print "Creating black can background contribution for %s" \
                  % dataset_type

        if t is not None:
            t.getTime(False)
            
        bccoeff = array_manip.sub_ncerr(1.0, 0.0, tcoeff[0], tcoeff[1])
        bcan1 = common_lib.mult_ncerr(bcan, bccoeff)

        if t is not None:
            t.getTime(msg="After creating black can background contribution ")
        
        del bcan
    else:
        bcan1 = None

    # Step 8: Create empty can background contribution
    if ecan is not None:
        if conf.verbose:
            print "Creating empty can background contribution for %s" \
                  % dataset_type

        if t is not None:
            t.getTime(False)
        
        ecan1 = common_lib.mult_ncerr(ecan, tcoeff)

        if t is not None:
            t.getTime(msg="After creating empty can background contribution ")
        
        del ecan
    else:
        ecan1 = None

    # Step 9: Create background spectra
    if bcan1 is not None or ecan1 is not None and conf.verbose:
        print "Creating background spectra for %s" % dataset_type
    
    if bcan1 is not None and ecan1 is not None:
        if cwp_used:
            if conf.verbose:
                print "Rebinning empty can to black can axis."
                
            ecan2 = common_lib.rebin_axis_1D_frac(ecan1, bcan1[0].axis[0].val)
        else:
            ecan2 = ecan1

        del ecan1
        
        if t is not None:
            t.getTime(False)

        b_som = common_lib.add_ncerr(bcan1, ecan2)

        if t is not None:
            t.getTime(msg="After creating background spectra ")
    elif bcan1 is not None and ecan1 is None:
        b_som = bcan1
    elif bcan1 is None and ecan1 is not None:
        b_som = ecan1
    else:
        b_som = None

    del bcan1, ecan1

    if cwp_used:
        if conf.verbose:
            print "Rebinning background spectra to %s" % dataset_type

        b_som1 = common_lib.rebin_axis_1D_frac(b_som, obj[0].axis[0].val)
    else:
        b_som1 = b_som

    del b_som

    if conf.dump_ctof_comb and b_som1 is not None:
        b_som_1 = dr_lib.sum_all_spectra(b_som1)
        hlr_utils.write_file(conf.output, "text/Spec", b_som_1,
                             output_ext="ctof",
                             extra_tag="background",
                             data_ext=conf.ext_replacement,    
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined background TOF information")
        del b_som_1
        
    # Step 10: Subtract background from data
    obj1 = dr_lib.subtract_bkg_from_data(obj, b_som1, verbose=conf.verbose,
                                         timer=t,
                                         dataset1=dataset_type,
                                         dataset2="background")

    del obj, b_som1

    # Step 11: Calculate initial velocity
    if conf.verbose:
        print "Calculating initial velocity"

    if t is not None:
        t.getTime(False)
        
    if conf.initial_energy is not None:
        initial_wavelength = common_lib.energy_to_wavelength(\
            conf.initial_energy.toValErrTuple())
        initial_velocity = common_lib.wavelength_to_velocity(\
            initial_wavelength)
    else:
        # This should actually calculate it, but don't have a way right now
        pass

    if t is not None:
        t.getTime(msg="After calculating initial velocity ")

    # Step 12: Calculate the time-zero offset
    if conf.time_zero_offset is not None:
        time_zero_offset = conf.time_zero_offset.toValErrTuple()
    else:
        # This should actually calculate it, but don't have a way right now
        time_zero_offset = (0.0, 0.0)

    # Step 13: Convert time-of-flight to final velocity
    if conf.verbose:
        print "Converting TOF to final velocity DGS"

    if t is not None:
        t.getTime(False)
        
    obj2 = common_lib.tof_to_final_velocity_dgs(obj1, initial_velocity,
                                                time_zero_offset,
                                                units="microsecond")

    if t is not None:
        t.getTime(msg="After calculating TOF to final velocity DGS ")
        
    del obj1
    
    # Step 14: Convert final velocity to final wavelength
    if conf.verbose:
        print "Converting final velocity DGS to final wavelength"

    if t is not None:
        t.getTime(False)
        
    obj3 = common_lib.velocity_to_wavelength(obj2)

    if t is not None:
        t.getTime(msg="After calculating velocity to wavelength ")

    del obj2

    if conf.dump_wave_comb:
        obj3_1 = dr_lib.sum_all_spectra(obj3,
                                     rebin_axis=conf.lambda_bins.toNessiList())
        hlr_utils.write_file(conf.output, "text/Spec", obj3_1,
                             output_ext="fwv",
                             extra_tag=dataset_type,
                             data_ext=conf.ext_replacement,    
                             path_replacement=conf.path_replacement,
                             verbose=conf.verbose,
                             message="combined final wavelength information")

        del obj3_1

    # Step 15: Create the detector efficiency
    if conf.det_eff is not None:
        if conf.verbose:
            print "Creating detector efficiency spectra"

        if t is not None:
            t.getTime(False)
            
        det_eff = dr_lib.create_det_eff(obj3)

        if t is not None:
            t.getTime(msg="After creating detector efficiency spectra ")
    else:
        det_eff = None

    # Step 16: Divide the detector pixel spectra by the detector efficiency
    if det_eff is not None:
        if conf.verbose:
            print "Correcting %s for detector efficiency" % dataset_type

        if t is not None:
            t.getTime(False)

        obj4 = common_lib.div_ncerr(obj3, det_eff)

        if t is not None:
            t.getTime(msg="After correcting %s for detector efficiency" \
                      % dataset_type)
    else:
        obj4 = obj3

    del obj3, det_eff

    return obj4