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srundplug.py
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srundplug.py
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r"""
srundplug: Undulator spectra calculations. An easy (or not too difficult)
interface to make these calculations using Srw, Urgent, and Us.
functions (summary):
calc1d<code> returns (e,f)
f=flux (phot/s/0.1%bw) versus e=photon energy in eV
calc2d<code> returns (h,v,p)
p=power density (W/mm^2) versus h and v slit
directions in mm
calc3d<code> returns (e,h,v,f)
f = flux (phot/s/0.1%bw/mm^2) versus e=energy in eV,
h and v slit directions in mm
"""
__author__ = "Manuel Sanchez del Rio"
__contact__ = "srio@esrf.eu"
__copyright__ = "ESRF, 2014-2016"
#
#---------------------------- IMPORT ------------------------------------------
#
import os
import sys
import time
import array
import numpy
import shutil # to copy files
#SRW
USE_URGENT= True
USE_US = True
USE_SRWLIB = True
USE_PYSRU = False
if USE_SRWLIB:
try:
import srwlib
except:
try:
import wpg.srwlib as srwlib
except:
USE_SRWLIB = False
print("SRW is not available")
#catch standard optput
try:
from io import StringIO # Python3
except ImportError:
from StringIO import StringIO # Python2
try:
import matplotlib.pylab as plt
except ImportError:
print("failed to import matplotlib. Do not try to do on-line plots.")
from srxraylib.plot.gol import plot, plot_contour, plot_surface, plot_image, plot_show
########################################################################################################################
#
# GLOBAL NAMES
#
########################################################################################################################
# #Physical constants (global, by now)
import scipy.constants as codata
codata_mee = numpy.array(codata.physical_constants["electron mass energy equivalent in MeV"][0])
m2ev = codata.c * codata.h / codata.e # lambda(m) = m2eV / energy(eV)
# counter for output files
scanCounter = 0
# try:
# from orangecontrib.xoppy.util.xoppy_util import locations
# except:
# raise Exception("IMPORT")
# directory where to find urgent and us binaries
try:
from orangecontrib.xoppy.util.xoppy_util import locations
home_bin = locations.home_bin()
except:
import platform
if platform.system() == 'Linux':
home_bin='/scisoft/xop2.4/bin.linux/'
print("srundplug: undefined home_bin. It has been set to ", home_bin)
elif platform.system() == 'Darwin':
home_bin = "/scisoft/xop2.4/bin.darwin/"
print("srundplug: undefined home_bin. It has been set to ", home_bin)
else:
raise FileNotFoundError("srundplug: undefined home_bin")
#check
if os.path.isfile(home_bin + 'us') == False:
raise FileNotFoundError("srundplug: File not found: "+home_bin+'us')
if os.path.isfile(home_bin + 'urgent') == False:
raise FileNotFoundError("srundplug: File not found: " + home_bin + 'urgent')
# directory where to find urgent and us binaries
try:
home_bin
except NameError:
#home_bin='/users/srio/Oasys/Orange-XOPPY/orangecontrib/xoppy/bin.linux/'
home_bin='/scisoft/xop2.4/bin.linux/'
print("srundplug: undefined home_bin. It has been set to ",home_bin)
#check
if os.path.isfile(home_bin+'us') == False:
print("srundplug: File not found: "+home_bin+'us')
if os.path.isfile(home_bin+'urgent') == False:
sys.exit("srundplug: File not found: "+home_bin+'urgent')
########################################################################################################################
#
# 1D: calc1d<code> Flux calculations
#
########################################################################################################################
def calc1d_pysru(bl,photonEnergyMin=3000.0,photonEnergyMax=55000.0,photonEnergyPoints=5,
npoints_grid=51,zero_emittance=False,fileName=None,fileAppend=False):
r"""
run pySRU for calculating flux
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
t0 = time.time()
print("Inside calc1d_pysru")
from pySRU.Simulation import create_simulation
from pySRU.ElectronBeam import ElectronBeam
from pySRU.MagneticStructureUndulatorPlane import MagneticStructureUndulatorPlane
from pySRU.TrajectoryFactory import TrajectoryFactory, TRAJECTORY_METHOD_ANALYTIC,TRAJECTORY_METHOD_ODE
from pySRU.RadiationFactory import RadiationFactory,RADIATION_METHOD_NEAR_FIELD, \
RADIATION_METHOD_APPROX_FARFIELD
myBeam = ElectronBeam(Electron_energy=bl['ElectronEnergy'], I_current=bl['ElectronCurrent'])
myUndulator = MagneticStructureUndulatorPlane(K=bl['Kv'], period_length=bl['PeriodID'], length=bl['PeriodID']*bl['NPeriods'])
is_quadrant = 1
if is_quadrant:
X = numpy.linspace(0,0.5*bl['gapH'],npoints_grid)
Y = numpy.linspace(0,0.5*bl['gapV'],npoints_grid)
else:
X = numpy.linspace(-0.5*bl['gapH'],0.5*bl['gapH'],npoints_grid)
Y = numpy.linspace(-0.5*bl['gapH'],0.5*bl['gapH'],npoints_grid)
#
# Warning: The automatic calculation of Nb_pts_trajectory dependens on the energy at this setup and it
# will kept constant over the full spectrum. Therefore, the setup here is done for the most
# "difficult" case, i.e., the highest energy.
# Setting photon_energy=None will do it at the first harmonic, and it was found that the flux
# diverges at high energies in some cases (energy_radiated_approximation_and_farfield)
#
simulation_test = create_simulation(magnetic_structure=myUndulator,electron_beam=myBeam,
magnetic_field=None, photon_energy=photonEnergyMax,
traj_method=TRAJECTORY_METHOD_ODE,Nb_pts_trajectory=None,
rad_method=RADIATION_METHOD_NEAR_FIELD, Nb_pts_radiation=None,
initial_condition=None, distance=bl['distance'],XY_are_list=False,X=X,Y=Y)
# simulation_test.trajectory.plot()
simulation_test.print_parameters()
# simulation_test.radiation.plot(title=("radiation in a screen for first harmonic"))
print("Integrated flux at resonance: %g photons/s/0.1bw"%(simulation_test.radiation.integration(is_quadrant=is_quadrant)))
energies = numpy.linspace(photonEnergyMin,photonEnergyMax,photonEnergyPoints)
eArray,intensArray = simulation_test.calculate_spectrum_on_slit(abscissas_array=energies,use_eV=1,is_quadrant=is_quadrant,do_plot=0)
#**********************Saving results
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
f.write("\n")
scanCounter +=1
f.write("#S %d Undulator spectrum calculation using pySRU\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD photonEnergyMin = %f\n"%(photonEnergyMin))
f.write("#UD photonEnergyMax = %f\n"%(photonEnergyMax))
f.write("#UD photonEnergyPoints = %d\n"%(photonEnergyPoints))
#
# write flux to file
#
header="#N 4 \n#L PhotonEnergy[eV] PhotonWavelength[A] Flux[phot/sec/0.1%bw] Spectral Power[W/eV]\n"
f.write(header)
for i in range(eArray.size):
f.write(' ' + repr(eArray[i]) + ' ' + repr(m2ev/eArray[i]*1e10) + ' ' +
repr(intensArray[i]) + ' ' +
repr(intensArray[i]*codata.e*1e3) + '\n')
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else:
print("File written to disk: %s"%(os.path.join(os.getcwd(),fileName)))
return (eArray,intensArray)
def calc1d_srw(bl,photonEnergyMin=3000.0,photonEnergyMax=55000.0,photonEnergyPoints=500,zero_emittance=False,
srw_max_harmonic_number=None,fileName=None,fileAppend=False):
r"""
run SRW for calculating flux
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
t0 = time.time()
print("Inside calc1d_srw")
#derived
#TODO calculate the numerical factor using codata
#B0 = bl['Kv']/0.934/(bl['PeriodID']*1e2)
cte = codata.e/(2*numpy.pi*codata.electron_mass*codata.c)
B0 = bl['Kv']/bl['PeriodID']/cte
if srw_max_harmonic_number == None:
gamma = bl['ElectronEnergy'] / (codata_mee * 1e-3)
resonance_wavelength = (1 + bl['Kv']**2 / 2.0) / 2 / gamma**2 * bl["PeriodID"]
resonance_energy = m2ev / resonance_wavelength
srw_max_harmonic_number = int(photonEnergyMax / resonance_energy * 1.1)
print ("Max harmonic considered:%d ; Resonance energy: %g eV\n"%(srw_max_harmonic_number,resonance_energy))
Nmax = srw_max_harmonic_number # 21,61
print('Running SRW (SRWLIB Python)')
#***********Undulator
harmB = srwlib.SRWLMagFldH() #magnetic field harmonic
harmB.n = 1 #harmonic number
harmB.h_or_v = 'v' #magnetic field plane: horzontal ('h') or vertical ('v')
harmB.B = B0 #magnetic field amplitude [T]
und = srwlib.SRWLMagFldU([harmB])
und.per = bl['PeriodID'] #period length [m]
und.nPer = bl['NPeriods'] #number of periods (will be rounded to integer)
#Container of all magnetic field elements
magFldCnt = srwlib.SRWLMagFldC([und], srwlib.array('d', [0]), srwlib.array('d', [0]), srwlib.array('d', [0]))
#***********Electron Beam
eBeam = srwlib.SRWLPartBeam()
eBeam.Iavg = bl['ElectronCurrent'] #average current [A]
eBeam.partStatMom1.x = 0. #initial transverse positions [m]
eBeam.partStatMom1.y = 0.
eBeam.partStatMom1.z = 0. #initial longitudinal positions (set in the middle of undulator)
eBeam.partStatMom1.xp = 0 #initial relative transverse velocities
eBeam.partStatMom1.yp = 0
eBeam.partStatMom1.gamma = bl['ElectronEnergy']*1e3/codata_mee #relative energy
if zero_emittance:
sigX = 1e-25
sigXp = 1e-25
sigY = 1e-25
sigYp = 1e-25
sigEperE = 1e-25
else:
sigX = bl['ElectronBeamSizeH'] #horizontal RMS size of e-beam [m]
sigXp = bl['ElectronBeamDivergenceH'] #horizontal RMS angular divergence [rad]
sigY = bl['ElectronBeamSizeV'] #vertical RMS size of e-beam [m]
sigYp = bl['ElectronBeamDivergenceV'] #vertical RMS angular divergence [rad]
sigEperE = bl['ElectronEnergySpread']
print("calc1dSrw: starting calculation using ElectronEnergySpead=%e \n"%((sigEperE)))
#2nd order stat. moments:
eBeam.arStatMom2[0] = sigX*sigX #<(x-<x>)^2>
eBeam.arStatMom2[1] = 0 #<(x-<x>)(x'-<x'>)>
eBeam.arStatMom2[2] = sigXp*sigXp #<(x'-<x'>)^2>
eBeam.arStatMom2[3] = sigY*sigY #<(y-<y>)^2>
eBeam.arStatMom2[4] = 0 #<(y-<y>)(y'-<y'>)>
eBeam.arStatMom2[5] = sigYp*sigYp #<(y'-<y'>)^2>
eBeam.arStatMom2[10] = sigEperE*sigEperE #<(E-<E>)^2>/<E>^2
#***********Precision Parameters
arPrecF = [0]*5 #for spectral flux vs photon energy
arPrecF[0] = 1 #initial UR harmonic to take into account
arPrecF[1] = Nmax #final UR harmonic to take into account
arPrecF[2] = 1.5 #longitudinal integration precision parameter
arPrecF[3] = 1.5 #azimuthal integration precision parameter
arPrecF[4] = 1 #calculate flux (1) or flux per unit surface (2)
#***********UR Stokes Parameters (mesh) for Spectral Flux
stkF = srwlib.SRWLStokes() #for spectral flux vs photon energy
#srio stkF.allocate(10000, 1, 1) #numbers of points vs photon energy, horizontal and vertical positions
stkF.allocate(photonEnergyPoints, 1, 1) #numbers of points vs photon energy, horizontal and vertical positions
stkF.mesh.zStart = bl['distance'] #longitudinal position [m] at which UR has to be calculated
stkF.mesh.eStart = photonEnergyMin #initial photon energy [eV]
stkF.mesh.eFin = photonEnergyMax #final photon energy [eV]
stkF.mesh.xStart = -bl['gapH']/2 #initial horizontal position [m]
stkF.mesh.xFin = bl['gapH']/2 #final horizontal position [m]
stkF.mesh.yStart = -bl['gapV']/2 #initial vertical position [m]
stkF.mesh.yFin = bl['gapV']/2 #final vertical position [m]
#**********************Calculation (SRWLIB function calls)
print('Performing Spectral Flux (Stokes parameters) calculation ... ') # , end='')
srwlib.srwl.CalcStokesUR(stkF, eBeam, und, arPrecF)
print('Done calc1dSrw calculation in %10.3f s'%(time.time()-t0))
#**********************Saving results
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
f.write("\n")
scanCounter +=1
f.write("#S %d Undulator spectrum calculation using SRW\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD photonEnergyMin = %f\n"%(photonEnergyMin))
f.write("#UD photonEnergyMax = %f\n"%(photonEnergyMax))
f.write("#UD photonEnergyPoints = %d\n"%(photonEnergyPoints))
f.write("#UD B0 = %f\n"%(B0))
#
# write flux to file
#
header="#N 4 \n#L PhotonEnergy[eV] PhotonWavelength[A] Flux[phot/sec/0.1%bw] Spectral Power[W/eV]\n"
f.write(header)
eArray = numpy.zeros(photonEnergyPoints)
intensArray = numpy.zeros(photonEnergyPoints)
for i in range(stkF.mesh.ne):
ener = stkF.mesh.eStart+i*(stkF.mesh.eFin-stkF.mesh.eStart)/numpy.array((stkF.mesh.ne-1)).clip(min=1)
if fileName is not None: f.write(' ' + repr(ener) + ' ' + repr(m2ev/ener*1e10) + ' ' +
repr(stkF.arS[i]) + ' ' +
repr(stkF.arS[i]*codata.e*1e3) + '\n')
eArray[i] = ener
intensArray[i] = stkF.arS[i]
if fileName is not None:
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else:
print("File written to disk: %s"%(os.path.join(os.getcwd(),fileName)))
return (eArray,intensArray)
def calc1d_urgent(bl,photonEnergyMin=1000.0,photonEnergyMax=100000.0,photonEnergyPoints=500,zero_emittance=False,fileName=None,fileAppend=False):
r"""
run Urgent for calculating flux
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
global home_bin
print("Inside calc1d_urgent")
t0 = time.time()
for file in ["urgent.inp","urgent.out"]:
try:
os.remove(os.path.join(locations.home_bin_run(),file))
except:
pass
with open("urgent.inp","wt") as f:
f.write("%d\n"%(1)) # ITYPE
f.write("%f\n"%(bl['PeriodID'])) # PERIOD
f.write("%f\n"%(0.00000)) #KX
f.write("%f\n"%(bl['Kv'])) #KY
f.write("%f\n"%(0.00000)) #PHASE
f.write("%d\n"%(bl['NPeriods'])) #N
f.write("%f\n"%(photonEnergyMin)) #EMIN
f.write("%f\n"%(photonEnergyMax)) #EMAX
f.write("%d\n"%(photonEnergyPoints)) #NENERGY
f.write("%f\n"%(bl['ElectronEnergy'])) #ENERGY
f.write("%f\n"%(bl['ElectronCurrent'])) #CUR
f.write("%f\n"%(bl['ElectronBeamSizeH']*1e3)) #SIGX
f.write("%f\n"%(bl['ElectronBeamSizeV']*1e3)) #SIGY
f.write("%f\n"%(bl['ElectronBeamDivergenceH']*1e3)) #SIGX1
f.write("%f\n"%(bl['ElectronBeamDivergenceV']*1e3)) #SIGY1
f.write("%f\n"%(bl['distance'])) #D
f.write("%f\n"%(0.00000)) #XPC
f.write("%f\n"%(0.00000)) #YPC
f.write("%f\n"%(bl['gapH']*1e3)) #XPS
f.write("%f\n"%(bl['gapV']*1e3)) #YPS
f.write("%d\n"%(50)) #NXP
f.write("%d\n"%(50)) #NYP
f.write("%d\n"%(4)) #MODE
if zero_emittance: #ICALC
f.write("%d\n"%(3))
else:
f.write("%d\n"%(1))
f.write("%d\n"%(-1)) #IHARM
f.write("%d\n"%(0)) #NPHI
f.write("%d\n"%(0)) #NSIG
f.write("%d\n"%(0)) #NALPHA
f.write("%f\n"%(0.00000)) #DALPHA
f.write("%d\n"%(0)) #NOMEGA
f.write("%f\n"%(0.00000)) #DOMEGA
command = os.path.join(home_bin,'urgent < urgent.inp')
print("Running command '%s' in directory: %s \n"%(command,os.getcwd()))
os.system(command)
print('Done calc1dUrgent calculation in %10.3f s'%(time.time()-t0))
# write spec file
txt = open("urgent.out").readlines()
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
f.write("\n")
scanCounter +=1
f.write("#S %d Undulator spectrum calculation using Urgent\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD photonEnergyMin = %f\n"%(photonEnergyMin))
f.write("#UD photonEnergyMax = %f\n"%(photonEnergyMax))
f.write("#UD photonEnergyPoints = %d\n"%(photonEnergyPoints))
f.write("#N 10\n")
f.write("#L Energy(eV) Wavelength(A) Flux(ph/s/0.1%bw) Spectral Power(W/eV) imin imax p1 p2 p3 p4\n")
nArray = 0
for i in txt:
tmp = i.strip(" ")
if tmp[0].isdigit():
nArray += 1
tmp = tmp.replace('D','e')
if fileName is not None: f.write(tmp)
else:
if fileName is not None: f.write("#UD "+tmp)
if fileName is not None:
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else:
print("File written to disk: %s"%(os.path.join(os.getcwd(),fileName)))
# stores results in numpy arrays for return
eArray = numpy.zeros(nArray)
intensArray = numpy.zeros(nArray)
iArray = -1
for i in txt:
tmp = i.strip(" ")
if tmp[0].isdigit():
iArray += 1
tmp = tmp.replace('D','e')
tmpf = numpy.array( [float(j) for j in tmp.split()] )
eArray[iArray] = tmpf[0]
intensArray[iArray] = tmpf[2]
return (eArray,intensArray)
def calc1d_us(bl,photonEnergyMin=1000.0,photonEnergyMax=100000.0,photonEnergyPoints=500,zero_emittance=False,fileName=None,fileAppend=False):
r"""
run US for calculating flux
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
global home_bin
t0 = time.time()
for file in ["us.inp","us.out"]:
try:
os.remove(os.path.join(locations.home_bin_run(),file))
except:
pass
print("Inside calc1d_us")
with open("us.inp","wt") as f:
f.write("US run\n")
f.write(" %f %f %f Ring-Energy Current\n"%
(bl['ElectronEnergy'],bl['ElectronCurrent']*1e3,bl['ElectronEnergySpread']))
f.write(" %f %f %f %f Sx Sy Sxp Syp\n"%
(bl['ElectronBeamSizeH']*1e3,bl['ElectronBeamSizeV']*1e3,
bl['ElectronBeamDivergenceH']*1e3,bl['ElectronBeamDivergenceV']*1e3) )
f.write(" %f %d 0.000 %f Period N Kx Ky\n"%
(bl['PeriodID']*1e2,bl['NPeriods'],bl['Kv']) )
f.write(" %f %f %d Emin Emax Ne\n"%
(photonEnergyMin,photonEnergyMax,photonEnergyPoints) )
f.write(" %f 0.000 0.000 %f %f 50 50 D Xpc Ypc Xps Yps Nxp Nyp\n"%
(bl['distance'],bl['gapH']*1e3,bl['gapV']*1e3) )
# f.write(" 4 4 0 Mode Method Iharm\n")
if zero_emittance:
f.write(" 4 3 0 Mode Method Iharm\n")
else:
f.write(" 4 4 0 Mode Method Iharm\n")
f.write(" 0 0 0.0 64 8.0 0 Nphi Nalpha Dalpha2 Nomega Domega Nsigma\n")
f.write("foreground\n")
command = os.path.join(home_bin,'us')
print("Running command '%s' in directory: %s \n"%(command,os.getcwd()))
os.system(command)
print('Done calc1dUs calculation in %10.3f s'%(time.time()-t0))
txt = open("us.out").readlines()
# write spec file
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
f.write("\n")
scanCounter +=1
f.write("#S %d Undulator spectrum calculation using US\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD photonEnergyMin = %f\n"%(photonEnergyMin))
f.write("#UD photonEnergyMax = %f\n"%(photonEnergyMax))
f.write("#UD photonEnergyPoints = %d\n"%(photonEnergyPoints))
f.write("#N 8\n")
f.write("#L Energy(eV) Wavelength(A) Flux(ph/s/0.1%bw) SpectralPower(W/ev) p1 p2 p3 p4\n")
nArray = 0
for i in txt:
tmp = i.strip(" ")
if tmp[0].isdigit():
tmp = tmp.replace('D','e')
tmp = numpy.fromstring(tmp,dtype=float,sep=' ')
if fileName is not None:
f.write(("%g "*8+"\n")%(tmp[0],1e10*m2ev/tmp[0],tmp[1],tmp[1]*1e3*codata.e,tmp[2],tmp[3],tmp[4],tmp[5]))
nArray += 1
else:
if fileName is not None: f.write("#UD "+tmp)
if fileName is not None:
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else:
print("File written to disk: %s"%(os.path.join(os.getcwd(),fileName)))
# stores results in numpy arrays for return
eArray = numpy.zeros(nArray)
intensArray = numpy.zeros(nArray)
iArray = -1
for i in txt:
tmp = i.strip(" ")
if tmp[0].isdigit():
iArray += 1
tmp = tmp.replace('D','e')
tmpf = numpy.array( [float(j) for j in tmp.split()] )
eArray[iArray] = tmpf[0]
intensArray[iArray] = tmpf[1]
return (eArray,intensArray)
########################################################################################################################
#
# 2D: calc2d<code> Power density calculations
#
########################################################################################################################
def calc2d_pysru(bl,zero_emittance=False,hSlitPoints=51,vSlitPoints=51,
photonEnergyMin=50.0,photonEnergyMax=2500.0,photonEnergyPoints=2451,
fileName=None,fileAppend=False):
e,h,v,i = calc3d_pysru(bl,zero_emittance=zero_emittance,
photonEnergyMin=photonEnergyMin,photonEnergyMax=photonEnergyMax,photonEnergyPoints=photonEnergyPoints,
hSlitPoints=hSlitPoints,vSlitPoints=vSlitPoints,
fileName=fileName,fileAppend=fileAppend)
e_step = (photonEnergyMax - photonEnergyMin) / photonEnergyPoints
plot(e,(i.sum(axis=2)).sum(axis=1)*(v[1]-v[0])*(h[1]-h[0]),show=0,title="Spectrum for %s"%bl)
return (h,v,i.sum(axis=0)*e_step*codata.e*1e3)
def calc2d_srw(bl,zero_emittance=False,hSlitPoints=101,vSlitPoints=51,srw_max_harmonic_number=21,
fileName=None,fileAppend=False,):
r"""
run SRW for calculating power density
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
print("Inside calc2d_srw")
#Maximum number of harmonics considered. This is critical for speed.
#TODO: set it automatically to a reasonable value (see how is done by Urgent).
Nmax = srw_max_harmonic_number # 21,61
#derived
#TODO calculate the numerical factor using codata
# B0 = bl['Kv']/0.934/(bl['PeriodID']*1e2)
cte = codata.e/(2*numpy.pi*codata.electron_mass*codata.c)
B0 = bl['Kv']/bl['PeriodID']/cte
print('Running SRW (SRWLIB Python)')
#***********Undulator
harmB = srwlib.SRWLMagFldH() #magnetic field harmonic
harmB.n = 1 #harmonic number
harmB.h_or_v = 'v' #magnetic field plane: horzontal ('h') or vertical ('v')
harmB.B = B0 #magnetic field amplitude [T]
und = srwlib.SRWLMagFldU([harmB])
und.per = bl['PeriodID'] #period length [m]
und.nPer = bl['NPeriods'] #number of periods (will be rounded to integer)
#Container of all magnetic field elements
magFldCnt = srwlib.SRWLMagFldC([und], array.array('d', [0]), array.array('d', [0]), array.array('d', [0]))
#***********Electron Beam
eBeam = srwlib.SRWLPartBeam()
eBeam.Iavg = bl['ElectronCurrent'] #average current [A]
eBeam.partStatMom1.x = 0. #initial transverse positions [m]
eBeam.partStatMom1.y = 0.
eBeam.partStatMom1.z = 0. #initial longitudinal positions (set in the middle of undulator)
eBeam.partStatMom1.xp = 0 #initial relative transverse velocities
eBeam.partStatMom1.yp = 0
eBeam.partStatMom1.gamma = bl['ElectronEnergy']*1e3/codata_mee #relative energy
if zero_emittance:
sigEperE = 1e-25
sigX = 1e-25
sigXp = 1e-25
sigY = 1e-25
sigYp = 1e-25
else:
sigEperE = bl['ElectronEnergySpread'] #relative RMS energy spread
sigX = bl['ElectronBeamSizeH'] #horizontal RMS size of e-beam [m]
sigXp = bl['ElectronBeamDivergenceH'] #horizontal RMS angular divergence [rad]
sigY = bl['ElectronBeamSizeV'] #vertical RMS size of e-beam [m]
sigYp = bl['ElectronBeamDivergenceV'] #vertical RMS angular divergence [rad]
#2nd order stat. moments:
eBeam.arStatMom2[0] = sigX*sigX #<(x-<x>)^2>
eBeam.arStatMom2[1] = 0 #<(x-<x>)(x'-<x'>)>
eBeam.arStatMom2[2] = sigXp*sigXp #<(x'-<x'>)^2>
eBeam.arStatMom2[3] = sigY*sigY #<(y-<y>)^2>
eBeam.arStatMom2[4] = 0 #<(y-<y>)(y'-<y'>)>
eBeam.arStatMom2[5] = sigYp*sigYp #<(y'-<y'>)^2>
eBeam.arStatMom2[10] = sigEperE*sigEperE #<(E-<E>)^2>/<E>^2
#***********Precision Parameters
arPrecP = [0]*5 #for power density
arPrecP[0] = 1.5 #precision factor
arPrecP[1] = 1 #power density computation method (1- "near field", 2- "far field")
arPrecP[2] = 0 #initial longitudinal position (effective if arPrecP[2] < arPrecP[3])
arPrecP[3] = 0 #final longitudinal position (effective if arPrecP[2] < arPrecP[3])
arPrecP[4] = 20000 #number of points for (intermediate) trajectory calculation
#***********UR Stokes Parameters (mesh) for power densiyu
stkP = srwlib.SRWLStokes() #for power density
stkP.allocate(1, hSlitPoints, vSlitPoints) #numbers of points vs horizontal and vertical positions (photon energy is not taken into account)
stkP.mesh.zStart = bl['distance'] #longitudinal position [m] at which power density has to be calculated
stkP.mesh.xStart = -bl['gapH']/2 #initial horizontal position [m]
stkP.mesh.xFin = bl['gapH']/2 #final horizontal position [m]
stkP.mesh.yStart = -bl['gapV']/2 #initial vertical position [m]
stkP.mesh.yFin = bl['gapV']/2 #final vertical position [m]
#**********************Calculation (SRWLIB function calls)
print('Performing Power Density calculation (from field) ... ')
t0 = time.time()
srwlib.srwl.CalcPowDenSR(stkP, eBeam, 0, magFldCnt, arPrecP)
print('Done Performing Power Density calculation (from field).')
#**********************Saving results
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
#
# write power density to file as mesh scan
#
scanCounter +=1
f.write("\n#S %d Undulator power density calculation using SRW\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write('\n#U B0 = ' + repr(B0 ) + '\n' )
f.write('\n#U hSlitPoints = ' + repr(hSlitPoints) + '\n' )
f.write('\n#U vSlitPoints = ' + repr(vSlitPoints) + '\n' )
f.write("#N 3 \n#L H[mm] V[mm] PowerDensity[W/mm^2] \n" )
hArray = numpy.zeros(stkP.mesh.nx)
vArray = numpy.zeros(stkP.mesh.ny)
totPower = numpy.array(0.0)
hProfile = numpy.zeros(stkP.mesh.nx)
vProfile = numpy.zeros(stkP.mesh.ny)
powerArray = numpy.zeros((stkP.mesh.nx,stkP.mesh.ny))
# fill arrays
ij = -1
for j in range(stkP.mesh.ny):
for i in range(stkP.mesh.nx):
ij += 1
xx = stkP.mesh.xStart + i*(stkP.mesh.xFin-stkP.mesh.xStart)/(stkP.mesh.nx-1)
yy = stkP.mesh.yStart + j*(stkP.mesh.yFin-stkP.mesh.yStart)/(stkP.mesh.ny-1)
#ij = i*stkP.mesh.nx + j
totPower += stkP.arS[ij]
powerArray[i,j] = stkP.arS[ij]
hArray[i] = xx*1e3 # mm
vArray[j] = yy*1e3 # mm
# dump
if fileName is not None:
for i in range(stkP.mesh.nx):
for j in range(stkP.mesh.ny):
f.write(repr(hArray[i]) + ' ' + repr(vArray[j]) + ' ' + repr(powerArray[i,j]) + '\n')
totPower = totPower * \
(stkP.mesh.xFin-stkP.mesh.xStart)/(stkP.mesh.nx-1)*1e3 * \
(stkP.mesh.yFin-stkP.mesh.yStart)/(stkP.mesh.ny-1)*1e3
hStep = (stkP.mesh.xFin-stkP.mesh.xStart)/(stkP.mesh.nx-1)
# dump profiles
if fileName is not None:
scanCounter +=1
f.write("\n#S %d Undulator power density calculation using SRW: H profile\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write( "#UD Total power [W]: "+repr(totPower)+"\n")
f.write( "#UD FWHM [mm] : "+repr(calc_fwhm(hProfile,hStep)[0]*1e3)+"\n")
f.write( "#N 2 \n")
f.write( "#L H[mm] PowerDensityCentralProfile[W/mm2] \n" )
for i in range(stkP.mesh.nx):
#xx = stkP.mesh.xStart + i*hStep
#f.write(repr(xx*1e3) + ' ' + repr(hProfile[i]) + '\n')
f.write(repr(hArray[i]) + ' ' + \
repr(powerArray[i,int(len(vArray)/2)]) + '\n')
scanCounter +=1
vStep = (stkP.mesh.yFin-stkP.mesh.yStart)/(stkP.mesh.ny-1)
f.write("\n#S %d Undulator power density calculation using SRW: V profile\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write( "#UD Total power [W]: "+repr(totPower)+"\n")
f.write( "#UD FWHM [mm] : "+repr(calc_fwhm(vProfile,vStep)[0]*1e3)+"\n")
f.write( "#N 2 \n")
f.write( "#L V[mm] PowerDensityCentralProfile[W/mm2] \n" )
for j in range(stkP.mesh.ny):
f.write(repr(vArray[j]) + ' ' + \
repr(powerArray[int(len(hArray)/2),j]) + '\n')
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else:
print("File written to disk: %s"%(os.path.join(os.getcwd(),fileName)))
print( "Total power SRW [W]: "+repr(totPower))
return (hArray, vArray, powerArray)
def calc2d_us(bl,zero_emittance=False,hSlitPoints=51,vSlitPoints=51,fileName=None,fileAppend=False):
r"""
run US for calculating power density
input: a dictionary with beamline
output: file name with results
"""
global scanCounter
global home_bin
print("Inside calc2d_us")
for file in ["us.inp","us.out"]:
try:
os.remove(os.path.join(locations.home_bin_run(),file))
except:
pass
with open("us.inp","wt") as f:
#f.write("%d\n"%(1)) # ITYPE
#f.write("%f\n"%(bl['PeriodID'])) # PERIOD
f.write("US run\n")
f.write(" %f %f %f Ring-Energy Current\n"%
(bl['ElectronEnergy'],bl['ElectronCurrent']*1e3,bl['ElectronEnergySpread']))
f.write(" %f %f %f %f Sx Sy Sxp Syp\n"%
(bl['ElectronBeamSizeH']*1e3,bl['ElectronBeamSizeV']*1e3,
bl['ElectronBeamDivergenceH']*1e3,bl['ElectronBeamDivergenceV']*1e3) )
f.write(" %f %d 0.000 %f Period N Kx Ky\n"%
(bl['PeriodID']*1e2,bl['NPeriods'],bl['Kv']) )
f.write(" 9972.1 55000.0 500 Emin Emax Ne\n")
f.write(" %f 0.000 0.000 %f %f %d %d D Xpc Ypc Xps Yps Nxp Nyp\n"%
(bl['distance'],bl['gapH']*1e3,bl['gapV']*1e3,hSlitPoints-1,vSlitPoints-1) )
if zero_emittance:
f.write(" 6 3 0 Mode Method Iharm\n")
else:
f.write(" 6 1 0 Mode Method Iharm\n")
f.write(" 0 0 0.0 64 8.0 0 Nphi Nalpha Dalpha2 Nomega Domega Nsigma\n")
f.write("foreground\n")
command = os.path.join(home_bin,'us')
print("Running command '%s' in directory: %s \n"%(command,os.getcwd()))
print("\n--------------------------------------------------------\n")
os.system(command)
print("Done.")
print("\n--------------------------------------------------------\n")
txt = open("us.out").readlines()
# write spec file
if fileName is not None:
if fileAppend:
f = open(fileName,"a")
else:
scanCounter = 0
f = open(fileName,"w")
f.write("#F "+fileName+"\n")
f.write("\n")
scanCounter +=1
f.write("#S %d Undulator power density calculation using US\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD hSlitPoints = %f\n"%(hSlitPoints))
f.write("#UD vSlitPoints = %f\n"%(vSlitPoints))
f.write("#N 7\n")
f.write("#L H[mm] V[mm] PowerDensity[W/mm^2] p1 p2 p3 p4\n")
mesh = numpy.zeros((7,(hSlitPoints)*(vSlitPoints)))
hh = numpy.zeros((hSlitPoints))
vv = numpy.zeros((vSlitPoints))
int_mesh = numpy.zeros( ((hSlitPoints),(vSlitPoints)) )
imesh = -1
for i in txt:
tmp = i.strip(" ")
if tmp[0].isdigit():
if fileName is not None: f.write(tmp)
tmpf = numpy.array( [float(j) for j in tmp.split()] )
imesh = imesh + 1
mesh[:,imesh] = tmpf
else:
if fileName is not None: f.write("#UD "+tmp)
imesh = -1
for i in range(hSlitPoints):
for j in range(vSlitPoints):
imesh = imesh + 1
hh[i] = mesh[0,imesh]
vv[j] = mesh[1,imesh]
int_mesh[i,j] = mesh[2,imesh]
hhh = numpy.concatenate((-hh[::-1],hh[1:]))
vvv = numpy.concatenate((-vv[::-1],vv[1:]))
tmp = numpy.concatenate( (int_mesh[::-1,:],int_mesh[1:,:]), axis=0)
int_mesh2 = numpy.concatenate( (tmp[:,::-1],tmp[:,1:]),axis=1)
if fileName is not None:
scanCounter += 1
f.write("\n#S %d Undulator power density calculation using US (whole slit)\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD hSlitPoints = %f\n"%(hSlitPoints))
f.write("#UD vSlitPoints = %f\n"%(vSlitPoints))
f.write("#N 3\n")
f.write("#L H[mm] V[mm] PowerDensity[W/mm^2]\n")
for i in range(len(hhh)):
for j in range(len(vvv)):
f.write("%f %f %f\n"%(hhh[i],vvv[j],int_mesh2[i,j]) )
totPower = int_mesh2.sum() * (hh[1]-hh[0]) * (vv[1]-vv[0])
if fileName is not None:
scanCounter += 1
f.write("\n#S %d Undulator power density calculation using US: H profile\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD hSlitPoints = %f\n"%(hSlitPoints))
f.write("#UD vSlitPoints = %f\n"%(vSlitPoints))
f.write("#UD Total power [W]: "+repr(totPower)+"\n")
f.write("#N 2\n")
f.write("#L H[mm] PowerDensity[W/mm2]\n")
for i in range(len(hhh)):
f.write("%f %f\n"%(hhh[i],int_mesh2[i,int(len(vvv)/2)]) )
scanCounter += 1
f.write("\n#S %d Undulator power density calculation using US: V profile\n"%(scanCounter))
for i,j in bl.items(): # write bl values
f.write ("#UD %s = %s\n" % (i,j) )
f.write("#UD hSlitPoints = %f\n"%(hSlitPoints))
f.write("#UD vSlitPoints = %f\n"%(vSlitPoints))
f.write("#UD Total power [W]: "+repr(totPower)+"\n")
f.write("#N 2\n")
f.write("#L V[mm] PowerDensity[W/mm2]\n")
for i in range(len(vvv)):
f.write("%f %f\n"%(vvv[i],int_mesh2[int(len(hhh)/2),i]) )
f.close()
if fileAppend:
print("Data appended to file: %s"%(os.path.join(os.getcwd(),fileName)))
else: