Esempio n. 1
0
    def __init__(self,d=[],rho=[],sigma=[],comp=[],elem_z=[],theta=[],params={}):
        """
        Parameters:
        -----------
        All these should be num arrays, dtype = double
        * d array of layer thicknesses (angstroms)
        * rho array of corresponding densities (g/cm^3)
        * sigma array of interface roughnesses (angstroms)
        * comp is the composition array
        * elem_z are the Z values of each element in the model
        * theta array of theta values (degrees)
        * params is a dictionary of model parameters (see set_params)
        """
        self.iff = Ifeffit(screen_echo = 0)
        self.nlayer    = 0
        self.nelem     = 0
        self.nthet     = 0
        self.fp        = []
        self.fpp       = []
        self.amu       = []
        self.mu_at     = []

        self._init_params()
        # some flags
        self._init_en   = True
        self._init_fy   = True
        self._init_carr = True
        self._init_ptr  = True
        # init
        self.init_model(d=d,rho=rho,sigma=sigma,comp=comp,elem_z=elem_z,theta=theta)
        self.set_params(**params)
Esempio n. 2
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    def __init__(self,
                 d=[],
                 rho=[],
                 sigma=[],
                 comp=[],
                 elem_z=[],
                 theta=[],
                 params={}):
        """
        Parameters:
        -----------
        All these should be num arrays, dtype = double
        * d array of layer thicknesses (angstroms)
        * rho array of corresponding densities (g/cm^3)
        * sigma array of interface roughnesses (angstroms)
        * comp is the composition array
        * elem_z are the Z values of each element in the model
        * theta array of theta values (degrees)
        * params is a dictionary of model parameters (see set_params)
        """
        self.iff = Ifeffit(screen_echo=0)
        self.nlayer = 0
        self.nelem = 0
        self.nthet = 0
        self.fp = []
        self.fpp = []
        self.amu = []
        self.mu_at = []

        self._init_params()
        # some flags
        self._init_en = True
        self._init_fy = True
        self._init_carr = True
        self._init_ptr = True
        # init
        self.init_model(d=d,
                        rho=rho,
                        sigma=sigma,
                        comp=comp,
                        elem_z=elem_z,
                        theta=theta)
        self.set_params(**params)
Esempio n. 3
0
    def __init__(self, load=None):
        self.root   = Tk()
        # launch Ifeffit in screen_echo = 0 mode
        Ifeffit.__init__(self, screen_echo = 0)
        self.root.option_add('*font', ('Helvetica', 12))
        self.drawsplash(self.root)
        Pmw.initialise(self.root)
        self.root.withdraw()

        self.root.title('G.I.Feffit')
        self.inp_buff  = []  # command buffer
        self.ind_      = 0    # index in inp_buff
        self.plot_opts = self.reset_plot_opts()
        self.prefs     = {}
        self.feff_paths= {}
        self.ask_exit  = 1
        self.iff_com   = self.do_ifeffit
	self.balloon   = Pmw.Balloon(self.root)
        self.inp_buff.append("") ;
        self.createMenubar(self.root)
        self.createMainWin(self.root)
        self.root.mainloop()
Esempio n. 4
0
class RefModel(_XrayRefl):
    """
    Reflectivity model

    See wrxrr._XrayRefl for details
    regarding the initialization - we need to make
    sure that the arrays/data are appropriate
    to pass to the c library.
    """
    def __init__(self,d=[],rho=[],sigma=[],comp=[],elem_z=[],theta=[],params={}):
        """
        Parameters:
        -----------
        All these should be num arrays, dtype = double
        * d array of layer thicknesses (angstroms)
        * rho array of corresponding densities (g/cm^3)
        * sigma array of interface roughnesses (angstroms)
        * comp is the composition array
        * elem_z are the Z values of each element in the model
        * theta array of theta values (degrees)
        * params is a dictionary of model parameters (see set_params)
        """
        self.iff = Ifeffit(screen_echo = 0)
        self.nlayer    = 0
        self.nelem     = 0
        self.nthet     = 0
        self.fp        = []
        self.fpp       = []
        self.amu       = []
        self.mu_at     = []

        self._init_params()
        # some flags
        self._init_en   = True
        self._init_fy   = True
        self._init_carr = True
        self._init_ptr  = True
        # init
        self.init_model(d=d,rho=rho,sigma=sigma,comp=comp,elem_z=elem_z,theta=theta)
        self.set_params(**params)

    ###########################################################################
    def init_model(self, d=None, rho=None, sigma=None, comp=None,
                   elem_z=None, theta=None):
        """
        Initialize/modify model data and arrays.

        Note that arrays should be passed in as numpy arrays, and will
        be assigned by reference!! See wrxrr._XrayRefl._init_model for
        array creation
        """
        if d != None:
            self.nlayer = len(d)
            if (d.dtype == DTYPE): self.d = d
            else: raise exceptions.ValueError
            self._init_carr = True
            self._init_ptr = True
        #
        if rho != None:
            if len(rho) != self.nlayer: raise exceptions.ValueError
            if (rho.dtype == DTYPE): self.rho = rho
            else: raise exceptions.ValueError
            self._init_ptr = True
        #
        if sigma != None:
            if len(sigma) != self.nlayer-1: raise exceptions.ValueError
            if (sigma.dtype == DTYPE): self.sigma = sigma
            else: raise exceptions.ValueError
            self._init_ptr = True
        #
        if comp != None:
            if (comp.dtype != DTYPE): raise exceptions.ValueError
            nel,nz = comp.shape
            if nz != self.nlayer: raise exceptions.ValueError
            self.comp = comp
            if nel != self.nelem:
                self.nelem  = nel
                self._init_en   = True
                self._init_fy   = True
            self._init_ptr  = True
        #
        if elem_z != None:
            if len(elem_z) != self.nelem: raise exceptions.ValueError
            if (elem_z.dtype == DTYPE): self.elem_z = elem_z
            else: raise exceptions.ValueError
            self._init_en   = True
            self._init_fy   = True
            self._init_ptr  = True
        #
        if theta != None:
            self.nthet  = len(theta)
            if (theta.dtype == DTYPE): self.theta = theta
            else: raise exceptions.ValueError
            self._init_carr = True
            self._init_ptr  = True

    ##########################################################
    def set_params(self,**params):
        """
        Parameters:
        -----------
        * energy (eV) is the incident energy        # calc_params[0]
        * wconv (degrees) is the concolution width  # calc_params[1]
        * slen  (mm) is the sample length           # calc_params[2]
        * bvert (mm) is the vertical beam dim       # calc_params[3]
        * bhorz (mm) is the horizontal beam dim     # calc_params[4]
        * aflag is a flag for area calcs            # calc_params[6]
        * fyidx is the index of the element for FY  # calc_params[6]
        * fyenergy (eV) is the energy of FY         # calc_params[7]
        * adet  (deg) is the angle of the detector  # calc_params[8]
        * tnorm (deg) is the theta for normalizatio # calc_params[9]
        * rflag is the roughness flag               # calc_params[10]
        * delz (ang) is the delta z for integration # calc_params[11]
        * pdepth is the substrate FY clac flag      # calc_params[12]
        * rscale is a scale factor for reflectivity # calc_params[13]
        """
        if len(params) == 0: return
        if params.has_key('energy'):
            self.calc_params[0] = params['energy']
            self._init_en = True
        if params.has_key('wconv'):  self.calc_params[1] = params['wconv']
        if params.has_key('slen'):   self.calc_params[2] = params['slen']
        if params.has_key('bvert'):  self.calc_params[3] = params['bvert']
        if params.has_key('bhorz'):  self.calc_params[4] = params['bhorz']
        if params.has_key('aflag'):  self.calc_params[5] = params['aflag']
        if params.has_key('fyidx'):  self.calc_params[6] = params['fyidx']
        if params.has_key('fyenergy'):
            self.calc_params[7] = params['fyenergy']
            self._init_fy = True
        if params.has_key('adet'):   self.calc_params[8] = params['adet']
        if params.has_key('tnorm'):  self.calc_params[9] = params['tnorm']
        if params.has_key('rflag'):  self.calc_params[10] = params['rflag']
        if params.has_key('delz'):   self.calc_params[11] = params['delz']
        if params.has_key('pdepth'): self.calc_params[12] = params['pdepth']
        if params.has_key('rscale'): self.calc_params[13] = params['rscale']

    ##########################################################
    def get_params(self,**params):
        """
        return params
        """
        params = {}
        params['energy']   = self.calc_params[0]
        params['wconv']    = self.calc_params[1]
        params['slen']     = self.calc_params[2]
        params['bvert']    = self.calc_params[3]
        params['bhorz']    = self.calc_params[4]
        params['aflag']    = self.calc_params[5]
        params['fyidx']    = self.calc_params[6]
        params['fyenergy'] = self.calc_params[7]
        params['adet']     = self.calc_params[8]
        params['tnorm']    = self.calc_params[9]
        params['rflag']    = self.calc_params[10]
        params['delz']     = self.calc_params[11]
        params['pdepth']   = self.calc_params[12]
        params['rscale']   = self.calc_params[13]
        return params

    ##########################################################
    def init_energy(self,):
        """
        Change the incident energy of the calc

        get fp,fpp from ifeffit for index of refraction calcs
        """
        if len(self.fp) != self.nelem:
            self.fp    = num.zeros(self.nelem, dtype=num.double)
            self.fpp   = num.zeros(self.nelem, dtype=num.double)
            self.amu   = num.zeros(self.nelem, dtype=num.double)
            self._init_ptr  = True

        energy = self.calc_params[0]
        for j in range(self.nelem):
            en = [energy, energy + 1.]
            self.iff.put_array('calc.en',en)
            cmd = 'f1f2(energy=calc.en,z=%i)' % self.elem_z[j]
            self.iff.ifeffit(cmd)
            fp  = self.iff.get_array('calc.f1')
            fpp = self.iff.get_array('calc.f2')
            #
            self.fp[j]  = fp[0]
            self.fpp[j] = fpp[0]
            self.amu[j] = elements.amu(self.elem_z[j])

        self._init_en = False

    ##########################################################
    def init_fy(self,):
        """
        Get fpp from ifeffit and use this to est mu_atomic for fy.
        This will be a decent estimate for high z and E
        however, these are approx since we are ignoring
        coherent and incoherent scattering cross sections
        to computing total (ie this is photoeffect only)
        """
        if len(self.mu_at) != self.nelem:
            self.mu_at = num.zeros(self.nelem, dtype=num.double)
            self._init_ptr  = True

        #below is 2*Na*r_e*hc (in cm^2*eV*mole/atom)
        con = 4.20792637233e07
        fy_energy = self.calc_params[7]
        if fy_energy == 0.0:
            self.mu_at = num.zeros(self.nelem, dtype=num.double)
        else:
            for j in range(self.nelem):
                en = [fy_energy, fy_energy + 1.]
                self.iff.put_array('calc.en',en)
                cmd = 'f1f2(energy=calc.en,z=%i)' % self.elem_z[j]
                self.iff.ifeffit(cmd)
                fp  = self.iff.get_array('calc.f1')
                fpp = self.iff.get_array('calc.f2')
                fpp = float(fpp[0])
                mu  = con*fpp/(fy_energy*self.amu[j])
                #
                self.mu_at[j] = mu
        self._init_fy = False

    ##########################################################
    def calc_R(self,ret=False):
        """
        Calc reflectivity
        """
        # save fy_idx to reset
        tmp = self.calc_params[6]
        self.calc_params[6] = -1.0
        #
        if self._init_en: self.init_energy()
        if self._init_fy: self.init_fy()
        #
        self._calc(init_ptrs=self._init_ptr,init_arrs=self._init_carr)
        #
        if self._init_ptr == True: self._init_ptr = False
        if self._init_carr == True: self._init_carr = False
        #
        self.calc_params[6] = tmp
        #
        if ret: return (self.R.copy())

    ##########################################################
    def calc_FY(self,ret=False):
        """
        Calc fluorescent yield
        """
        # check some stuff
        fy_idx = self.calc_params[6]
        if (fy_idx < 0.) or (fy_idx > self.nelem-1):
            print "Error, fy_idx out of range"
            return
        delz = self.calc_params[11]
        if delz < 1. :
            print "Error, zint too small, min = 1 ang."
            return
        #
        if self._init_en: self.init_energy()
        if self._init_fy: self.init_fy()
        #
        self._calc(init_ptrs=self._init_ptr, init_arrs=self._init_carr)


        #
        if self._init_ptr == True: self._init_ptr = False
        if self._init_carr == True: self._init_carr = False
        #
        if ret: return (self.Y.copy(), self.R.copy())

    ##########################################################
    def make_mole_fractions(self):
        """
        make composition into mole fractions
        """
        self.comp = self.comp / self.comp.sum(0)
        return
Esempio n. 5
0
class RefModel(_XrayRefl):
    """
    Reflectivity model

    See wrxrr._XrayRefl for details
    regarding the initialization - we need to make
    sure that the arrays/data are appropriate
    to pass to the c library.
    """
    def __init__(self,
                 d=[],
                 rho=[],
                 sigma=[],
                 comp=[],
                 elem_z=[],
                 theta=[],
                 params={}):
        """
        Parameters:
        -----------
        All these should be num arrays, dtype = double
        * d array of layer thicknesses (angstroms)
        * rho array of corresponding densities (g/cm^3)
        * sigma array of interface roughnesses (angstroms)
        * comp is the composition array
        * elem_z are the Z values of each element in the model
        * theta array of theta values (degrees)
        * params is a dictionary of model parameters (see set_params)
        """
        self.iff = Ifeffit(screen_echo=0)
        self.nlayer = 0
        self.nelem = 0
        self.nthet = 0
        self.fp = []
        self.fpp = []
        self.amu = []
        self.mu_at = []

        self._init_params()
        # some flags
        self._init_en = True
        self._init_fy = True
        self._init_carr = True
        self._init_ptr = True
        # init
        self.init_model(d=d,
                        rho=rho,
                        sigma=sigma,
                        comp=comp,
                        elem_z=elem_z,
                        theta=theta)
        self.set_params(**params)

    ###########################################################################
    def init_model(self,
                   d=None,
                   rho=None,
                   sigma=None,
                   comp=None,
                   elem_z=None,
                   theta=None):
        """
        Initialize/modify model data and arrays.

        Note that arrays should be passed in as numpy arrays, and will
        be assigned by reference!! See wrxrr._XrayRefl._init_model for
        array creation
        """
        if d != None:
            self.nlayer = len(d)
            if (d.dtype == DTYPE): self.d = d
            else: raise exceptions.ValueError
            self._init_carr = True
            self._init_ptr = True
        #
        if rho != None:
            if len(rho) != self.nlayer: raise exceptions.ValueError
            if (rho.dtype == DTYPE): self.rho = rho
            else: raise exceptions.ValueError
            self._init_ptr = True
        #
        if sigma != None:
            if len(sigma) != self.nlayer - 1: raise exceptions.ValueError
            if (sigma.dtype == DTYPE): self.sigma = sigma
            else: raise exceptions.ValueError
            self._init_ptr = True
        #
        if comp != None:
            if (comp.dtype != DTYPE): raise exceptions.ValueError
            nel, nz = comp.shape
            if nz != self.nlayer: raise exceptions.ValueError
            self.comp = comp
            if nel != self.nelem:
                self.nelem = nel
                self._init_en = True
                self._init_fy = True
            self._init_ptr = True
        #
        if elem_z != None:
            if len(elem_z) != self.nelem: raise exceptions.ValueError
            if (elem_z.dtype == DTYPE): self.elem_z = elem_z
            else: raise exceptions.ValueError
            self._init_en = True
            self._init_fy = True
            self._init_ptr = True
        #
        if theta != None:
            self.nthet = len(theta)
            if (theta.dtype == DTYPE): self.theta = theta
            else: raise exceptions.ValueError
            self._init_carr = True
            self._init_ptr = True

    ##########################################################
    def set_params(self, **params):
        """
        Parameters:
        -----------
        * energy (eV) is the incident energy        # calc_params[0]
        * wconv (degrees) is the concolution width  # calc_params[1]
        * slen  (mm) is the sample length           # calc_params[2]
        * bvert (mm) is the vertical beam dim       # calc_params[3]
        * bhorz (mm) is the horizontal beam dim     # calc_params[4]
        * aflag is a flag for area calcs            # calc_params[6]
        * fyidx is the index of the element for FY  # calc_params[6]
        * fyenergy (eV) is the energy of FY         # calc_params[7]
        * adet  (deg) is the angle of the detector  # calc_params[8]
        * tnorm (deg) is the theta for normalizatio # calc_params[9]
        * rflag is the roughness flag               # calc_params[10]
        * delz (ang) is the delta z for integration # calc_params[11]
        * pdepth is the substrate FY clac flag      # calc_params[12]
        * rscale is a scale factor for reflectivity # calc_params[13]
        """
        if len(params) == 0: return
        if params.has_key('energy'):
            self.calc_params[0] = params['energy']
            self._init_en = True
        if params.has_key('wconv'): self.calc_params[1] = params['wconv']
        if params.has_key('slen'): self.calc_params[2] = params['slen']
        if params.has_key('bvert'): self.calc_params[3] = params['bvert']
        if params.has_key('bhorz'): self.calc_params[4] = params['bhorz']
        if params.has_key('aflag'): self.calc_params[5] = params['aflag']
        if params.has_key('fyidx'): self.calc_params[6] = params['fyidx']
        if params.has_key('fyenergy'):
            self.calc_params[7] = params['fyenergy']
            self._init_fy = True
        if params.has_key('adet'): self.calc_params[8] = params['adet']
        if params.has_key('tnorm'): self.calc_params[9] = params['tnorm']
        if params.has_key('rflag'): self.calc_params[10] = params['rflag']
        if params.has_key('delz'): self.calc_params[11] = params['delz']
        if params.has_key('pdepth'): self.calc_params[12] = params['pdepth']
        if params.has_key('rscale'): self.calc_params[13] = params['rscale']

    ##########################################################
    def get_params(self, **params):
        """
        return params
        """
        params = {}
        params['energy'] = self.calc_params[0]
        params['wconv'] = self.calc_params[1]
        params['slen'] = self.calc_params[2]
        params['bvert'] = self.calc_params[3]
        params['bhorz'] = self.calc_params[4]
        params['aflag'] = self.calc_params[5]
        params['fyidx'] = self.calc_params[6]
        params['fyenergy'] = self.calc_params[7]
        params['adet'] = self.calc_params[8]
        params['tnorm'] = self.calc_params[9]
        params['rflag'] = self.calc_params[10]
        params['delz'] = self.calc_params[11]
        params['pdepth'] = self.calc_params[12]
        params['rscale'] = self.calc_params[13]
        return params

    ##########################################################
    def init_energy(self, ):
        """
        Change the incident energy of the calc

        get fp,fpp from ifeffit for index of refraction calcs
        """
        if len(self.fp) != self.nelem:
            self.fp = num.zeros(self.nelem, dtype=num.double)
            self.fpp = num.zeros(self.nelem, dtype=num.double)
            self.amu = num.zeros(self.nelem, dtype=num.double)
            self._init_ptr = True

        energy = self.calc_params[0]
        for j in range(self.nelem):
            en = [energy, energy + 1.]
            self.iff.put_array('calc.en', en)
            cmd = 'f1f2(energy=calc.en,z=%i)' % self.elem_z[j]
            self.iff.ifeffit(cmd)
            fp = self.iff.get_array('calc.f1')
            fpp = self.iff.get_array('calc.f2')
            #
            self.fp[j] = fp[0]
            self.fpp[j] = fpp[0]
            self.amu[j] = elements.amu(self.elem_z[j])

        self._init_en = False

    ##########################################################
    def init_fy(self, ):
        """
        Get fpp from ifeffit and use this to est mu_atomic for fy.
        This will be a decent estimate for high z and E
        however, these are approx since we are ignoring
        coherent and incoherent scattering cross sections
        to computing total (ie this is photoeffect only)
        """
        if len(self.mu_at) != self.nelem:
            self.mu_at = num.zeros(self.nelem, dtype=num.double)
            self._init_ptr = True

        #below is 2*Na*r_e*hc (in cm^2*eV*mole/atom)
        con = 4.20792637233e07
        fy_energy = self.calc_params[7]
        if fy_energy == 0.0:
            self.mu_at = num.zeros(self.nelem, dtype=num.double)
        else:
            for j in range(self.nelem):
                en = [fy_energy, fy_energy + 1.]
                self.iff.put_array('calc.en', en)
                cmd = 'f1f2(energy=calc.en,z=%i)' % self.elem_z[j]
                self.iff.ifeffit(cmd)
                fp = self.iff.get_array('calc.f1')
                fpp = self.iff.get_array('calc.f2')
                fpp = float(fpp[0])
                mu = con * fpp / (fy_energy * self.amu[j])
                #
                self.mu_at[j] = mu
        self._init_fy = False

    ##########################################################
    def calc_R(self, ret=False):
        """
        Calc reflectivity
        """
        # save fy_idx to reset
        tmp = self.calc_params[6]
        self.calc_params[6] = -1.0
        #
        if self._init_en: self.init_energy()
        if self._init_fy: self.init_fy()
        #
        self._calc(init_ptrs=self._init_ptr, init_arrs=self._init_carr)
        #
        if self._init_ptr == True: self._init_ptr = False
        if self._init_carr == True: self._init_carr = False
        #
        self.calc_params[6] = tmp
        #
        if ret: return (self.R.copy())

    ##########################################################
    def calc_FY(self, ret=False):
        """
        Calc fluorescent yield
        """
        # check some stuff
        fy_idx = self.calc_params[6]
        if (fy_idx < 0.) or (fy_idx > self.nelem - 1):
            print "Error, fy_idx out of range"
            return
        delz = self.calc_params[11]
        if delz < 1.:
            print "Error, zint too small, min = 1 ang."
            return
        #
        if self._init_en: self.init_energy()
        if self._init_fy: self.init_fy()
        #
        self._calc(init_ptrs=self._init_ptr, init_arrs=self._init_carr)

        #
        if self._init_ptr == True: self._init_ptr = False
        if self._init_carr == True: self._init_carr = False
        #
        if ret: return (self.Y.copy(), self.R.copy())

    ##########################################################
    def make_mole_fractions(self):
        """
        make composition into mole fractions
        """
        self.comp = self.comp / self.comp.sum(0)
        return
from Ifeffit import Ifeffit
from numpy import array,sqrt, exp, power
from scipy.special import gamma, gammaln
import time

iff = Ifeffit()
iff.ifeffit("set my.r = range(2,4,0.01)")
iff.ifeffit("show @arrays")

r = iff.get_array('my.r')

iff.ifeffit("set my.rho = my.r * my.r")

# iff.ifeffit("plot(my.r, my.rho)")

print r

def rho(r,r0, sigma2,k3):
    sigma = sqrt(sigma2)
    beta  = k3 / sigma2*sigma
    q     = 4 / (beta*beta)
    MAX = 20.
    if q > MAX: q=MAX
    if q < 2:   q=2
    if gammaln(q) > MAX:
        gammaq = MAX
    else:
        gammaq = max(1,min(MAX,gamma(q)))
    #print r0, sigma, beta, 4/(beta*beta), q, q-1, gammaln(q), gamma(q), gammaq

    pre = 2/ (sigma*abs(beta)*gammaq)