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The example to show how to use micro-size particle attributes in the bunch #21

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The example to show how to use micro-size particle attributes in the bunch #21

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57 changes: 57 additions & 0 deletions OrbitUtils_Tests/Bunch_Util_Tests/bunch_with_microsize_particles_attr.py
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##############################################################
# This script tests set the macrosizes to bunch or particles
##############################################################

import math
import sys
import time

from bunch import Bunch

print "Start."

#------------------------------
#Main Bunch init
#------------------------------

nParticles = 5
bunch = Bunch()
(x,xp,y,yp,z,dE) = (0.,0.,0.,0.,0.,0.)
for ind in range(nParticles):
bunch.addParticle(x,xp,y,yp,z,dE)

#---- The macro_size for Bunch instance
#---- after that each added or exiting macro-particle in the bunch
#---- will have a charge of 1000 electrons. So, If you add a macro-particle
#---- to bunch, you will increase the total charge of the bunch.
#---- 1.602176634e-19 - charge of 1 electron (abs. value)
macro_size = 1000*1.602176634e-19
bunch.macroSize(macro_size)
print "================init bunch==============="
bunch.dumpBunch()
print "========================================="

#---- add particles macrosize attribut
#---- after that macro-particles can have different macro-sizes.
#---- by default the value is zero.
#---- After you setup macrosize attribute to particles any space-charge will be
#---- defined by these macrosizes, the clobal macro-size for the bunch object
#---- will be ingnored.
bunch.addPartAttr("macrosize")
print "================bunch with macrosize=0 particles attribute ==============="
bunch.dumpBunch()
print "=========================================================================="
atribute_array_index = 0
for ind in range(nParticles):
#---- set macrosize for particle with index=ind
macro = macro_size*ind
bunch.partAttrValue("macrosize", ind, atribute_array_index, macro)
#---- get macrosize for particle with index=ind
new_macro_size = bunch.partAttrValue("macrosize", ind, atribute_array_index)
print "ind =",ind," size=",new_macro_size

print "================bunch with macrosize particles attribute ==============="
bunch.dumpBunch()
print "=========================================================================="

print "Stop."