def TOF(time, n_dataset, parms, data, glbl):
# time of flight signal model. The function takes an array of uncorrected time in seconds and
# returns an array with the corresponing comptute signal
# averaging_type = glbl.averaging_types[n_dataset-1]
# prob_curve_type = glbl.functions[n_dataset-1]
angles = glbl.angles_list
cutoff_type = glbl.cutoff_types[n_dataset - 1]
mass_molecules = data.mass_molecules
mass_factor = np.sqrt(mass_molecules[n_dataset - 1] / glbl.massH2)
y_scale = parms["y_scale_%i" % n_dataset].value
baseline = parms["baseline_%i" % n_dataset].value
# tcutc = Params['tcutc_%i' %NDataSet].value
# tcutw = Params['tcutw_%i' %NDataSet].value
ion_tof = parms["ion_tof_%i" % n_dataset].value * mass_factor
# Temperature = Params['Temp_%i' %NDataSet].value
# subtract the ion flight time and eliminate singularity that would occur at time = 0
time = time - ion_tof * 1e-6
time = np.where(time != 0, time, np.repeat(0.01e-6, len(time)))
cutoff = cutoff_function(parms, data, glbl, n_dataset, time, cutoff_type)
signal0 = angular_averaging(time, n_dataset, angles, parms, glbl, data)
signal = signal0 * cutoff * y_scale + baseline
return signal
def ProbFromTOFInversion(time, signal, n_dataset, parms, averaging_type, theta_angles,
prob_curve_type, cutoff_type, mass_molecules):
# time of flight signal model. The function takes an uncorrected time in seconds and returns a signal
mass_factor = np.sqrt(mass_molecules[n_dataset - 1] / glbl.massH2)
ffr_dist = parms['ffr_%i' % n_dataset].value * 1E-3
max_tof = parms['y_scale_%i' % n_dataset].value
baseline = parms['baseline_%i' % n_dataset].value
TimeCorr = parms['IonTOF_%i' % n_dataset].value * mass_factor
Temperature = parms['Temp_%i' % n_dataset].value
# subtract the ion flight time and eliminate singularity that would occur at time = 0
time = time - TimeCorr * 1E-6
time = np.where(time != 0, time, np.repeat(0.01E-6, len(time)))
CutOff = cutoff_function(parms, data, n_dataset, time, cutoff_type)
velocity_distribution = 0. # Initialize Signal to 0
if averaging_type == "PointDetector":
# Averaging performed taking into account different flight time for different angles
for theta in theta_angles:
# v = x / t = ( L / cos(theta) ) / t
velocity = ffr_dist / (time * np.cos(np.radians(theta)))
Ekin = (0.5 * glbl.AMU * velocity ** 2.) * glbl.eVConst
# Enorm = Ekin * np.cos( np.radians(theta) )**2. # Reaction probability depends on normal energy
velocity_distribution = velocity_distribution \
+ velocity**4. \
* np.exp(-Ekin / (glbl.kb * Temperature)) \
* np.cos( np.radians(theta) )**2. \
* np.sin( np.radians(theta) ) \
* glbl.theta_step
elif averaging_type == "None":
# No angular averaging
velocity = ffr_dist / time
Ekin = (0.5 * glbl.AMU * velocity ** 2.) * glbl.eVConst
# Enorm = Ekin
velocity_distribution = velocity**4. * np.exp(-Ekin / (glbl.kb * Temperature))
# kludge to fix divide by zero runtime error
for ii in range(len(velocity_distribution)):
if velocity_distribution[ii] == 0:
velocity_distribution[ii] = 1E-100
ProbFromTOF = (signal - baseline) / (max_tof * velocity_distribution * CutOff)
Energy = 0.5 * glbl.AMU * (ffr_dist / time) ** 2. * glbl.eVConst
return Energy, ProbFromTOF
def write_fit_out(glbl, data, path, control_filename, fit_number, fit_result, PlotDataSets):
state_string = 'v' + str(data.states[0][0]) + 'j' + str(data.states[0][1])
result_filename = 'Fit' + fit_number + '_' + data.molecules[0] + \
'_' + state_string + '_' + glbl.functions[0] + '.fit_out'
parms = fit_result.params
with open(path + result_filename, 'w') as result_file:
result_file.write('#\n')
result_file.write('# Fit {} Results\n'.format(fit_number))
result_file.write('#\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Control file: \n')
result_file.write('# {}\n'.format(control_filename))
result_file.write('#' + 60 * '-' + '\n')
# --------------------------------------------------------------------------
# write the control file to the result file
# --------------------------------------------------------------------------
with open(control_filename, 'r') as cmd:
cmd_lines = cmd.readlines()
for line in cmd_lines:
result_file.write('# ' + line)
# result_file.write('\n#' + 60 * '-' + '\n')
# result_file.write('# End Control File\n')
# result_file.write('#' + 60 * '-' + '\n')
# --------------------------------------------------------------------------
# write the angular averaging parameters
# --------------------------------------------------------------------------
result_file.write('#\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Angular Averaging Parameters\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# points_source : ' + str(glbl.points_source) + '\n')
result_file.write('# points_detector : ' + str(glbl.points_detector) + '\n')
result_file.write('# z_source : ' + str(glbl.z_source) + '\n')
result_file.write('# r_source : ' + str(glbl.r_source) + '\n')
result_file.write('# z_aperture : ' + str(glbl.z_aperture) + '\n')
result_file.write('# r_aperture : ' + str(glbl.r_aperture) + '\n')
result_file.write('# z_final : ' + str(glbl.z_final) + '\n')
result_file.write('# r_final : ' + str(glbl.r_final) + '\n')
# result_file.write('# it mse\n')
for i in range(0, len(glbl.angles_list), 10):
result_file.write('# angles_list : ' + str(glbl.angles_list[i: i + 10]) + '\n')
# result_file.write('#' + 60 * '-' + '\n')
# result_file.write('# End Angular Averaging Parameter\n')
# result_file.write('#' + 60 * '-' + '\n')
result_file.write('#\n')
# --------------------------------------------------------------------------
# write the fit report to the result file
# --------------------------------------------------------------------------
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Fit Report\n')
result_file.write('#' + 60 * '-' + '\n')
#------------------------------------------------------------------------------------------
# first write chi square and reduced chi square in scientific format
# standard fit report use numbers with 3 places after decimal point
# which results in print 0.000 sometimes
#------------------------------------------------------------------------------------------
result_file.write('# chi-square = {:10.3e}'.format(fit_result.chisqr) + '\n')
result_file.write('# reduced chi-square = {:10.3e}'.format(fit_result.redchi) + '\n')
result_file.write('#\n')
report = lmfit.fit_report(fit_result).split('\n')
for line in report:
result_file.write('# ' + line + '\n')
# result_file.write('#' + 60 * '-' + '\n')
# result_file.write('# End Fit Report\n')
# result_file.write('#' + 60 * '-' + '\n')
result_file.write('#\n')
# --------------------------------------------------------------------------
# the number of datasets to plot
# --------------------------------------------------------------------------
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Data for plots\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Number of plots : ' + str(len(PlotDataSets)) + '\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('#\n')
# --------------------------------------------------------------------------
# for each data set, write plot title, information for labels, and data
# --------------------------------------------------------------------------
for i in range(len(PlotDataSets)):
n_dataset = i + 1
n_min = data.fit_index_ranges[i][0]
n_max = data.fit_index_ranges[i][1]
t_min = data.datasets[i][0][n_min] * 1E6
t_max = data.datasets[i][0][n_max] * 1E6
ProbCurveType = glbl.functions[i]
averaging_type = glbl.averaging_types[i]
# DataFile = signal_filenames[i]
cutoff_type = glbl.cutoff_types[i]
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# Plot ' + str(n_dataset) + '\n')
result_file.write('#' + 60 * '-' + '\n')
# --------------------------------------------------------------------------
# write the plot title
# --------------------------------------------------------------------------
result_file.write('# Title : ')
result_file.write('Fit {:04d}_{}'.format(int(fit_number), n_dataset) + '\n')
# -------------------------------------------------------------------------------------
# write information for the plot labels
# -------------------------------------------------------------------------------------
comment = glbl.comments[i]
if comment == None:
comment = ''
signal_file = glbl.signal_filenames[i]
background_file = glbl.background_filenames[i]
if background_file == None:
background_file = 'none'
result_file.write('# commment : ' + comment + '\n')
result_file.write('# signal_file : ' + signal_file + '\n')
result_file.write('# background_file : ' + background_file + '\n')
result_file.write('# date : ' + data.dates[i] + '\n')
result_file.write('# molecule : ' + data.molecules[i] + '\n')
result_file.write('# states : ' + str(data.states[i]) + '\n')
result_file.write('# function : ' + ProbCurveType + '\n')
if averaging_type == 'none':
avg_type_label = 'No Averaging'
elif averaging_type == 'point_detector':
avg_type_label = 'Point Detector'
elif averaging_type == 'line_detector':
avg_type_label = 'Line Detector'
result_file.write('# avg_type_label : ' + avg_type_label + '\n')
#--------------------------------------------------------------------------------------
# write time range of fit and t_min, t_max, threshold, number points averaged
#--------------------------------------------------------------------------------------
result_file.write('#\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# fit range and how determined \n')
result_file.write('#' + 60 * '-' + '\n')
n_tup = (n_min, n_max)
t_tup = (t_min, t_max)
result_file.write('# fit_time_range : ' + str(glbl.fit_ranges[i]) + '\n')
result_file.write('# n_min, n_max : ' + str(n_tup) + '\n')
result_file.write('# threshold : ' + str(glbl.thresholds[i]) + '\n')
result_file.write('# n_delt for avg : ' + str(glbl.n_delts[i]) + '\n')
result_file.write('# t_min, t_max : ' + str(t_tup) + '\n')
#--------------------------------------------------------------------------------------
# write time range of fit and t_min, t_max, threshold, number points averaged
#--------------------------------------------------------------------------------------
result_file.write('#\n')
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# baseline and how determined \n')
result_file.write('#' + 60 * '-' + '\n')
baseline = fit_result.params['baseline_' + str(n_dataset)].value
result_file.write('# baseline_range : ' + str(glbl.baseline_ranges[i]) + '\n')
result_file.write('# baseline : ' + str(baseline) + '\n')
result_file.write('#\n')
#--------------------------------------------------------------------------------------
# write the parmameters for current plot
#--------------------------------------------------------------------------------------
result_file.write('#' + 60 * '-' + '\n')
result_file.write('# parameters used in fit \n')
result_file.write('#' + 60 * '-' + '\n')
parms = fit_result.params
for p in parms:
p_name = p.rsplit('_',1)[0]
p_n = int(p.rsplit('_',1)[1])
if p_n != n_dataset :
continue
result_file.write('# ' + '{:17}'.format(p_name +'_label') + ' : ')
result_file.write('{:>10.3g}'.format(parms[p].value))
if parms[p_name + '_1'].glbl and i > 0:
result_file.write(', (global)\n')
if not parms[p].vary:
result_file.write(', (fixed)\n')
else:
stderr = '{:6.3f}'.format(parms[p].stderr)
result_file.write(', (' + unicodedata.lookup('plus-minus sign')
+ str(stderr) + ')\n')
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
# Get the point where time > 2E-6 sec and ignore earlier points to avoid noise
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
# i_start = np.where(PlotDataSets[i][0] > 2.0E-6)[0][0]
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
# Decided it is not a good idea to not print all the data
# Better to write the plot routine to ignore the data
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
i_start = 0 # maybe not a good idea to throw away data
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
# Get the plot data and convert time to microseconds
#--------------------------------------------------------------------------------------# --------------------------------------------------------------------------
Time = PlotDataSets[i][0][i_start:]
Signal = PlotDataSets[i][1][i_start:]
Fit = compute_tof.TOF(Time, n_dataset, fit_result.params, data, glbl)
mass_factor = np.sqrt(data.mass_molecules[i] / glbl.massH2)
ion_tof = fit_result.params['ion_tof_%i' % n_dataset].value * mass_factor
#--------------------------------------------------------------------------------------
# Compute cutoff for plotting.
# Create a new time array which is corrected for ion time of flight
# Replace time=0 by time = 1e-8 to remove singularity in velocity and
# energy if t=0
#--------------------------------------------------------------------------------------
Time2 = Time - ion_tof * 1E-6
Time2 = np.where(Time2 != 0, Time2, np.repeat(0.01E-6, len(Time)))
Cutoff = cutoff_function(fit_result.params, data, glbl,
n_dataset, Time2, cutoff_type)
# Convert time to microseconds for plotting
Time = Time * 1E6 # convert to microseconds for plotting
#---------- ---------------------------------------------------------------------------
# write the number of data lines and range of lines fit
# -------------------------------------------------------------------------------------
result_file.write('# n_points : ' + str(len(Time)) + '\n')
result_file.write('#' + 68 * '-' + '\n')
# -------------------------------------------------------------------------------------
# write the plot data
# -------------------------------------------------------------------------------------
result_file.write('# time Signal Fit Cutoff\n')
result_file.write('#' + 68 * '-' + '\n')
result_file.write('# Begin data\n')
for j in range(len(Time)):
result_file.write('{:6.2f} {:20.5e} {:20.5e} {:20.5e}\n'
.format(Time[j], Signal[j], Fit[j], Cutoff[j]))
result_file.write('# End data\n')
result_file.write('#' + 68 * '-' + '\n')
result_file.write('# End Plot ' + str(n_dataset) + '\n')
# end comment out for profiling
# print("--- %s seconds ---" % (time.time() - start_time))
return result_filename
