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#! /usr/bin/env python
# Copyright 2019 Jean-Luc Vay, Maxence Thevenet, Remi Lehe
#
#
# This file is part of WarpX.
#
# License: BSD-3-Clause-LBNL
import sys
import yt ; yt.funcs.mylog.setLevel(0)
import numpy as np
import scipy.constants as scc
sys.path.insert(1, '../../../../warpx/Regression/Checksum/')
import checksumAPI
filename = sys.argv[1]
############################
### INITIAL LASER ENERGY ###
############################
energy_start = 9.1301289517e-08
##########################
### FINAL LASER ENERGY ###
##########################
ds = yt.load( filename )
all_data_level_0 = ds.covering_grid(level=0,left_edge=ds.domain_left_edge, dims=ds.domain_dimensions)
Bx = all_data_level_0['boxlib', 'Bx'].v.squeeze()
By = all_data_level_0['boxlib', 'By'].v.squeeze()
Bz = all_data_level_0['boxlib', 'Bz'].v.squeeze()
Ex = all_data_level_0['boxlib', 'Ex'].v.squeeze()
Ey = all_data_level_0['boxlib', 'Ey'].v.squeeze()
Ez = all_data_level_0['boxlib', 'Ez'].v.squeeze()
rho = all_data_level_0['boxlib','rho'].v.squeeze()
divE = all_data_level_0['boxlib','divE'].v.squeeze()
energyE = np.sum(scc.epsilon_0/2*(Ex**2+Ey**2+Ez**2))
energyB = np.sum(1./scc.mu_0/2*(Bx**2+By**2+Bz**2))
energy_end = energyE + energyB
Reflectivity = energy_end/energy_start
Reflectivity_theory = 1.3806831258153887e-06
error_rel = abs(Reflectivity-Reflectivity_theory) / Reflectivity_theory
tolerance_rel = 5./100
print("error_rel : " + str(error_rel))
print("tolerance_rel: " + str(tolerance_rel))
assert( error_rel < tolerance_rel )
# Check relative L-infinity spatial norm of rho/epsilon_0 - div(E)
Linf_norm = np.amax( np.abs( rho/scc.epsilon_0 - divE ) ) / np.amax( np.abs( rho/scc.epsilon_0 ) )
assert( Linf_norm < 2.e-2 )
test_name = filename[:-9] # Could also be os.path.split(os.getcwd())[1]
checksumAPI.evaluate_checksum(test_name, filename)
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