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# -*- coding: utf-8 -*-
__author__ = "Konstantin Klementiev, Roman Chernikov"
__date__ = "21 May 2020"
import numpy as np
import matplotlib.pyplot as plt
import time
# path to xrt:
import os, sys; sys.path.append(os.path.join('..', '..')) # analysis:ignore
import xrt.backends.raycing.sources as rs
def intensity_in_transverse_plane(energy, theta, psi, I0):
plt.imshow(I0[len(energy)//2, :, :],
extent=[theta[0]*1e6, theta[-1]*1e6, psi[0]*1e6, psi[-1]*1e6])
def main(case, icalc, plot):
if case == 1:
angleMaxX = 30e-6 # rad
angleMaxZ = 30e-6 # rad
energy = np.linspace(3800, 4150, 351)
theta = np.linspace(-1, 1, 51) * angleMaxX
psi = np.linspace(-1, 1, 51) * angleMaxZ
kwargsCommon = dict(
eE=3.0, eI=0.5, eEpsilonX=0.263, eEpsilonZ=0.008,
period=18.5, n=108, K=0.52,
xPrimeMax=theta[-1]*1e3, zPrimeMax=psi[-1]*1e3)
kwargsXRT = dict(
betaX=9.539, betaZ=1.982,
xPrimeMaxAutoReduce=False, zPrimeMaxAutoReduce=False,
# targetOpenCL='CPU',
distE='BW')
elif case == 2:
angleMaxX = 8.7e-6 # rad
angleMaxZ = 8.7e-6 # rad
energy = np.linspace(7250, 7450, 201)
theta = np.linspace(-1, 1, 801) * angleMaxX * 32
psi = np.linspace(-1, 1, 101) * angleMaxZ * 4
kwargsCommon = dict(
eE=1.72, eI=0.3, eEpsilonX=11.371, eEpsilonZ=0.1,
period=17, n=82, K=1.071)
kwargsXRT = dict(
betaX=1.65, betaZ=1,
xPrimeMax=theta[-1]*1e3, zPrimeMax=psi[-1]*1e3,
xPrimeMaxAutoReduce=False, zPrimeMaxAutoReduce=False,
distE='BW')
elif case == 3:
angleMaxX = 8.7e-6 # rad
angleMaxZ = 8.7e-6 # rad
energy = np.linspace(500, 10000, 1901)
theta = np.linspace(-1, 1, 801) * angleMaxX * 32
psi = np.linspace(-1, 1, 101) * angleMaxZ * 4
kwargsCommon = dict(
eE=1.72, eI=0.3, eEpsilonX=11.371, eEpsilonZ=0.1,
period=17, n=82, K=1.071)
kwargsXRT = dict(
betaX=1.65, betaZ=1,
xPrimeMax=theta[-1]*1e3, zPrimeMax=psi[-1]*1e3,
xPrimeMaxAutoReduce=False, zPrimeMaxAutoReduce=False,
distE='BW')
kwargsURGENT = dict(
eSigmaX=(kwargsCommon['eEpsilonX']*kwargsXRT['betaX']*1e3)**0.5,
eSigmaZ=(kwargsCommon['eEpsilonZ']*kwargsXRT['betaZ']*1e3)**0.5,
eMin=energy[0], eMax=energy[-1],
eN=len(energy)-1,
icalc=icalc,
xPrimeMax=angleMaxX*1e3, zPrimeMax=angleMaxZ*1e3,
nx=12, nz=12)
if kwargsURGENT['icalc'] == 3:
kwargsCommon['eEpsilonX'] = 0.
kwargsCommon['eEpsilonZ'] = 0.
fig = plt.figure(figsize=(10, 6))
ax = fig.add_subplot(111)
ax.set_xlabel(u'energy (keV)')
apX = angleMaxX * 2 * 1e6
apZ = angleMaxZ * 2 * 1e6
ax.set_ylabel(u'flux through {0:.1f}×{1:.1f} µrad² (ph/s/0.1%bw)'.format(
apX, apZ))
axplot = ax.semilogy if 'log-y' in plot else ax.plot
# xrt Undulator
kwargs = kwargsCommon.copy()
kwargs.update(kwargsXRT)
dtheta = theta[1] - theta[0]
dpsi = psi[1] - psi[0]
source = rs.Undulator(**kwargs)
print('please wait...')
I0x, l1, l2, l3 = source.intensities_on_mesh(energy, theta, psi,
eSpreadNSamples=13)
whereTheta = np.argwhere(abs(theta) <= angleMaxX)
wherePsi = np.argwhere(abs(psi) <= angleMaxZ)
fluxX = I0x[:,
slice(whereTheta.min(), whereTheta.max()+1),
slice(wherePsi.min(), wherePsi.max()+1)]\
.sum(axis=(1, 2)) * dtheta * dpsi
axplot(energy*1e-3, fluxX, label='xrt')
# end xrt Undulator
if case == 3:
eS, fS = np.loadtxt("misc/bessy.dc0.gz", skiprows=2, usecols=(0, 1),
unpack=True)
axplot(eS*1e-3, fS, label='Spectra')
# # UrgentUndulator
# import xrt.backends.raycing as raycing
# beamLine = raycing.BeamLine(azimuth=0, height=0)
# kwargs = kwargsCommon.copy()
# kwargs.update(kwargsURGENT)
# sourceU = rs.UndulatorUrgent(beamLine, **kwargs)
# I0u, l1, l2, l3 = sourceU.intensities_on_mesh()
# # add the other 3 quadrants, except the x=0 and z=0 lines:
# I0u = np.concatenate((I0u[:, :0:-1, :], I0u), axis=1)
# I0u = np.concatenate((I0u[:, :, :0:-1], I0u), axis=2)
# fluxU = I0u.sum(axis=(1, 2)) * sourceU.dx * sourceU.dz
# urgentEnergy = sourceU.Es
# axplot(urgentEnergy*1e-3, fluxU, label='Urgent')
# # end UrgentUndulator
# ax.set_ylim(1e9, 4e13)
ax.legend()
fig.savefig(u'flux_case{0}_xrt_UrgentICALC{1}.png'.format(case, icalc))
# fig = plt.figure()
# intensity_in_transverse_plane(energy, theta, psi, I0x)
# fig = plt.figure()
# intensity_in_transverse_plane(energy, theta, psi, I0u)
if __name__ == '__main__':
t0 = time.time()
# ICALC=1 non-zero emittance, finite N
# ICALC=2 non-zero emittance, infinite N
# ICALC=3 zero emittance, finite N
# main(case=1, icalc=3, plot='lin-y')
# main(case=1, icalc=2, plot='lin-y')
# main(case=1, icalc=1, plot='lin-y')
# main(case=2, icalc=3, plot='lin-y')
# main(case=2, icalc=2, plot='lin-y')
main(case=2, icalc=1, plot='lin-y')
# main(case=3, icalc=3, plot='log-y')
# main(case=3, icalc=2, plot='log-y')
# main(case=3, icalc=1, plot='log-y')
print("Done in {0} s".format(time.time()-t0))
plt.show()
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