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argon_box_genie.py
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argon_box_genie.py
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#!/usr/bin/env python
#
# Geant4-based simulation of particle interactions in a box of liquid argon
#
# For use in quick studies of particle interactions and energy
# deposition in liquid argon. Uses standard G4 physics lists, and
# includes a primitive option to generate a 3D map of the ionization
# energy deposition from the particles.
#
# Includes two particle generator options:
# - Monoenergetic particles of a specific type (e.g. e-, n, p, mu+)
# - HepEVT-formatted input data
#
# Output is a plain ROOT tree containing information on each Geant4
# track step. If the primitive energy deposition simulation is
# enabled, then a list of energy depositions and their coordinates
# are also included.
#
# dadwyer@lbl.gov, Aug. 18, 2017
# Import necessary Geant4 classes
# Generators
from Geant4 import G4VUserPrimaryGeneratorAction, G4ParticleGun
from Geant4 import G4ParticleTable, G4PrimaryParticle, G4PrimaryVertex
# User-defined actions
from Geant4 import G4UserRunAction, G4UserEventAction, G4UserSteppingAction
# Physics processes
from Geant4 import FTFP_BERT, QGSP_BERT, QGSP_BERT_HP
# Run Manager and UI commands
from Geant4 import gRunManager, gApplyUICommand, G4UImanager
# Physical Units
from Geant4 import MeV, cm, mm, g, mole, cm3, deg, GeV, m, c_light, ns
# Materials
from Geant4 import G4Material, G4NistManager, G4Element, G4Material
# Geometry
from Geant4 import G4VUserDetectorConstruction, G4LogicalVolume, G4PVPlacement
from Geant4 import G4Box, G4Tubs, G4SubtractionSolid, G4UnionSolid
from Geant4 import G4ThreeVector, G4RotationMatrix
# Visualization
from Geant4 import gVisManager
# Random numbers
from Geant4 import G4RandomDirection, HepRandom
# G4 Configuration
from Geant4 import G4UserLimits
# Pre-defined NIST materials
import g4py.NISTmaterials
# General tools
from copy import copy
from time import sleep
# General math
from math import sqrt, cos, sin, acos
# ROOT
from array import array
from ROOT import TTree, TFile
# Command-line arguments
from argparse import ArgumentParser
import numpy as np
class MySimulation:
"My Simple Simulation"
def __init__(self):
'''Constructor'''
self._ofilename = 'argon_sim.root'
self._random_seed = 23
self._ofile = None
self._otree = None
# self._gtree = None
self._treebuffer = None
self._materials = {}
self._geom = None
self._physlist_name = 'QGSP_BERT'
self._physics_list = None
self._source = None
self._shift = None
self._detX = None
self._detY = None
self._detZ = None
self._energies = None
self._source_position = None
self._generator = None
self._include_edepsim = False
self._edep_step = 2.0 * mm
return
def initialize(self):
'''Initialize the simulation'''
# Parse command-line arguments
self._parse_args()
# Prepare output file
self._prepare_output()
# Initialize random number generator
self._init_random()
# Prepare materials
self._init_materials()
# Prepare geometry
self._init_geometry()
# Prepare physics list
self._init_physics_list()
# Prepare generator
self._init_generator()
# Prepare user actions
self._init_user_actions()
# Prepare run manager
self._init_run_manager()
return
def run(self):
'''Run the simulation'''
if self._nevents > 0:
print "Provided events ", self._nevents
sleep(2)
gRunManager.BeamOn(self._nevents)
else:
nFile = TFile(self._source,'READ')
t = nFile.Get("gRooTracker")
print "Got entries from tree ", t.GetEntries()
sleep(2)
gRunManager.BeamOn(t.GetEntries())
return
def finalize(self):
'''Finalize the simulation'''
self._close_output()
return
######################
def _parse_args(self):
'''Parse command line arguments'''
parser = ArgumentParser()
parser.add_argument('--nevents', type=int, help='Number of events',
default=1)
parser.add_argument('--source', help='Particle name or generator',
default='e-')
parser.add_argument('--energy', type=float, help='Particle energy',
default=2.0 * GeV)
parser.add_argument('--output', help='Output filename')
parser.add_argument('--seed', type=int, help='Random seed')
parser.add_argument('--enable_edepsim',
help='Enable energy deposition in simulation',
action='store_true')
parser.add_argument('--edep_step', type=float,
help='Maximum step size in energy dep simulation',
default=2.0 * mm)
parser.add_argument('--physlist',
help='G4 Physics List: FTFP_BERT, QGSP_BERT, QGSP_BERT_HP',
default='QGSP_BERT')
parser.add_argument('--shift', type=float,
help='Shift from GENIE geom -> centered argon box in cm',
default='0.0')
parser.add_argument('--detX', type=float,
help='1/2 full Detector X dimension (m)',
default='0.0')
parser.add_argument('--detY', type=float,
help='1/2 full Detector Y dimension (m)',
default='0.0')
parser.add_argument('--detZ', type=float,
help='1/2 full Detector Z dimension (m)',
default='0.0')
self._args = parser.parse_args()
if self._args.nevents is not None:
self._nevents = self._args.nevents
if self._args.source is not None:
self._source = self._args.source
if self._args.energy is not None:
self._energies = [self._args.energy * GeV,]
if self._args.output is not None:
self._ofilename = self._args.output
if self._args.seed is not None:
self._random_seed = self._args.seed
if self._args.shift is not None:
self._shift = self._args.shift
if self._args.detX is not None:
self._detX = self._args.detX
if self._args.detY is not None:
self._detY = self._args.detY
if self._args.detZ is not None:
self._detZ = self._args.detZ
if self._args.enable_edepsim:
self._include_edepsim = True
if self._args.edep_step:
self._edep_step = self._args.edep_step
print "Configuration:"
print " nevents:",self._nevents
print " source:",self._source
print " shift:",self._shift
print " detX:",self._detX
print " detY:",self._detY
print " detZ:",self._detZ
print " energies:",self._energies
print " output:",self._ofilename
print " physlist:",self._physlist_name
print " seed:",self._random_seed
print " edepsim:",self._include_edepsim
print " edepstep:",self._edep_step
return
def _prepare_output(self):
'''Prepare ROOT tree for output data'''
ofile = TFile(self._ofilename,'RECREATE')
otree = TTree('argon','Argon Simulation')
tb = TreeBuffer()
tb.nevents = self._nevents
tb.maxInit = 100
tb.maxTracks = 1000000
tb.maxNQ = 10000000
tb.shift = self._shift
tb.ev = array('i',[0])
# Ancestor particles (e.g. neutrino)
# Note: For simplicity, assume only one potential ancestor
tb.pida = array('i',[0])
tb.xa = array('d',[0])
tb.ya = array('d',[0])
tb.za = array('d',[0])
tb.ta = array('d',[0])
tb.pxa = array('d',[0])
tb.pya = array('d',[0])
tb.pza = array('d',[0])
tb.ekina = array('d',[0])
tb.ma = array('d',[0])
tb.code = bytearray(51)
tb.codemap = {}
# Geant4 initial state particles
tb.ni = array('i',[0])
tb.pidi = array('i',[0]*tb.maxInit)
tb.xi = array('d',[0]*tb.maxInit)
tb.yi = array('d',[0]*tb.maxInit)
tb.zi = array('d',[0]*tb.maxInit)
tb.ti = array('d',[0]*tb.maxInit)
tb.pxi = array('d',[0]*tb.maxInit)
tb.pyi = array('d',[0]*tb.maxInit)
tb.pzi = array('d',[0]*tb.maxInit)
tb.ekini = array('d',[0]*tb.maxInit)
tb.mi = array('d',[0]*tb.maxInit)
# Geant4 track step data
tb.nstep = array('i',[0])
tb.tid = array('i',[0]*tb.maxTracks)
tb.pid = array('i',[0]*tb.maxTracks)
tb.parid = array('i',[0]*tb.maxTracks)
tb.xs = array('d',[0]*tb.maxTracks)
tb.ys = array('d',[0]*tb.maxTracks)
tb.zs = array('d',[0]*tb.maxTracks)
tb.xe = array('d',[0]*tb.maxTracks)
tb.ye = array('d',[0]*tb.maxTracks)
tb.ze = array('d',[0]*tb.maxTracks)
tb.te = array('d',[0]*tb.maxTracks)
tb.pxs = array('d',[0]*tb.maxTracks)
tb.pys = array('d',[0]*tb.maxTracks)
tb.pzs = array('d',[0]*tb.maxTracks)
tb.pxe = array('d',[0]*tb.maxTracks)
tb.pye = array('d',[0]*tb.maxTracks)
tb.pze = array('d',[0]*tb.maxTracks)
tb.ekin = array('d',[0]*tb.maxTracks)
tb.edep = array('d',[0]*tb.maxTracks)
# Geant4 energy deposition data
tb.nq = array('i',[0])
tb.tidq = array('i',[0]*tb.maxNQ)
tb.pidq = array('i',[0]*tb.maxNQ)
tb.sidq = array('i',[0]*tb.maxNQ)
tb.dq = array('d',[0]*tb.maxNQ)
tb.xq = array('d',[0]*tb.maxNQ)
tb.yq = array('d',[0]*tb.maxNQ)
tb.zq = array('d',[0]*tb.maxNQ)
# Hook for ancestor particle
tb.ancestor = None
otree.Branch('ev',tb.ev,'ev/I')
otree.Branch('pida',tb.pida,'pida/I')
otree.Branch('xa',tb.xa,'xa/D')
otree.Branch('ya',tb.ya,'ya/D')
otree.Branch('za',tb.za,'za/D')
otree.Branch('ta',tb.ta,'ta/D')
otree.Branch('pxa',tb.pxa,'pxa/D')
otree.Branch('pya',tb.pya,'pya/D')
otree.Branch('pza',tb.pza,'pza/D')
otree.Branch('ekina',tb.ekina,'ekina/D')
otree.Branch('ma',tb.ma,'ma/D')
otree.Branch('code',tb.code,'code[51]/C')
otree.Branch('ni',tb.ni,'ni/I')
otree.Branch('pidi',tb.pidi,'pidi[ni]/I')
otree.Branch('xi',tb.xi,'xi[ni]/D')
otree.Branch('yi',tb.yi,'yi[ni]/D')
otree.Branch('zi',tb.zi,'zi[ni]/D')
otree.Branch('ti',tb.ti,'ti[ni]/D')
otree.Branch('pxi',tb.pxi,'pxi[ni]/D')
otree.Branch('pyi',tb.pyi,'pyi[ni]/D')
otree.Branch('pzi',tb.pzi,'pzi[ni]/D')
otree.Branch('ekini',tb.ekini,'ekini[ni]/D')
otree.Branch('mi',tb.mi,'mi[ni]/D')
otree.Branch('nstep',tb.nstep,'nstep/I')
otree.Branch('tid',tb.tid,'tid[nstep]/I')
otree.Branch('pid',tb.pid,'pid[nstep]/I')
otree.Branch('parid',tb.parid,'parid[nstep]/I')
otree.Branch('ekin',tb.ekin,'ekin[nstep]/D')
otree.Branch('edep',tb.edep,'edep[nstep]/D')
otree.Branch('xs',tb.xs,'xs[nstep]/D')
otree.Branch('ys',tb.ys,'ys[nstep]/D')
otree.Branch('zs',tb.zs,'zs[nstep]/D')
otree.Branch('xe',tb.xe,'xe[nstep]/D')
otree.Branch('ye',tb.ye,'ye[nstep]/D')
otree.Branch('ze',tb.ze,'ze[nstep]/D')
otree.Branch('te',tb.te,'te[nstep]/D')
otree.Branch('pxs',tb.pxs,'pxs[nstep]/D')
otree.Branch('pys',tb.pys,'pys[nstep]/D')
otree.Branch('pzs',tb.pzs,'pzs[nstep]/D')
otree.Branch('pxe',tb.pxe,'pxe[nstep]/D')
otree.Branch('pye',tb.pye,'pye[nstep]/D')
otree.Branch('pze',tb.pze,'pze[nstep]/D')
otree.Branch('nq',tb.nq,'nq/I')
otree.Branch('tidq',tb.tidq,'tidq[nq]/I')
otree.Branch('pidq',tb.pidq,'pidq[nq]/I')
otree.Branch('sidq',tb.sidq,'sidq[nq]/I')
otree.Branch('dq',tb.dq,'dq[nq]/D')
otree.Branch('xq',tb.xq,'xq[nq]/D')
otree.Branch('yq',tb.yq,'yq[nq]/D')
otree.Branch('zq',tb.zq,'zq[nq]/D')
self._ofile = ofile
self._otree = otree
self._treebuffer = tb
return
def _close_output(self):
'''Write ROOT data, and close file'''
self._ofile.cd()
self._otree.Write()
self._ofile.Close()
return
def _init_random(self):
'''Initialize random number generator'''
HepRandom.setTheSeed(self._random_seed)
return
def _init_materials(self):
'''Prepare list of materials'''
g4py.NISTmaterials.Construct()
# Define liquid argon (name,z,a,density)
LAr_mat = G4Material("liquidArgon", 18., 39.95*g/mole, 1.390*g/cm3)
self._materials['liquidArgon'] = LAr_mat
return
def _init_geometry(self):
'''Initialize geant geometry'''
self._geom = MyDetectorConstruction(materials=self._materials,detX=self._detX,detY=self._detY,detZ=self._detZ)
gRunManager.SetUserInitialization(self._geom)
return
def _init_physics_list(self):
'''Initialize the physics list'''
# Use standard physics list
if self._physlist_name == 'FTFP_BERT':
self._physics_list = FTFP_BERT()
elif self._physlist_name == 'QGSP_BERT':
self._physics_list = QGSP_BERT()
elif self._physlist_name == 'QGSP_BERT_HP':
self._physics_list = QGSP_BERT_HP()
else:
raise ValueError("Invalid physics list: \'%r\'. Please choose from:FTFP_BERT, QGSP_BERT, QGSP_BERT_HP" % self._physlist_name)
#self._physics_list.RegisterPhysics(G4MyStepLimiterPhysics())
gRunManager.SetUserInitialization(self._physics_list)
return
def _init_generator(self):
'''Initialize particle generator'''
self._generator = MyGenieEvtGeneratorAction(
genieEvtFilename=self._source,
treebuffer=self._treebuffer,
ofile=self._ofile)
gRunManager.SetUserAction(self._generator)
return
def _init_user_actions(self):
'''Initialize user actions'''
self._run_action = MyRunAction()
self._event_action = MyEventAction(treebuffer=self._treebuffer,
outputtree=self._otree)
self._step_action = MySteppingAction(treebuffer=self._treebuffer,
geometry=self._geom,
materials=self._materials,
edepsim=self._include_edepsim,
edepstep=self._edep_step)
gRunManager.SetUserAction(self._run_action)
gRunManager.SetUserAction(self._event_action)
gRunManager.SetUserAction(self._step_action)
return
def _init_run_manager(self):
'''Initialize the Geant4 run manager'''
#gApplyUICommand('/run/setCut 0.1 mm')
gApplyUICommand('/run/initialize')
return
###################################################################
# Tree Buffer
class TreeBuffer:
'''Dummy class for collecting tree data buffers'''
pass
# Tree Buffer
class GTreeBuffer:
'''Dummy class for collecting tree data buffers'''
pass
# Detector Construction
class MyDetectorConstruction(G4VUserDetectorConstruction):
"My Detector Construction"
def __init__(self, materials={},detX=100.,detY=100.,detZ=100.):
G4VUserDetectorConstruction.__init__(self)
self.vols = []
self.rots = []
self.materials = materials
# Make table of indices for each volume region
self.volumeidx = {
'World':0,
}
self.detX = detX
self.detY = detY
self.detZ = detZ
print self.detX, self.detY, self.detZ
def Construct(self):
'''Construct geometry'''
# World (box of liquid argon)
#world_s = G4Box("World", 19.5*m, 1.5*m, 2.5*m)
world_s = G4Box("World", self.detX*m, self.detY*m, self.detZ*m)
world_l = G4LogicalVolume(world_s, self.materials['liquidArgon'],
"World")
world_p = G4PVPlacement(None, #no rotation
G4ThreeVector(), #at (0,0,0)
world_l, #its logical volume
"World", #its name
None, #its mother volume
False, #no boolean operation
0) #copy number
self.vols += [world_s, world_l, world_p]
# Restrict step size to ensure proper charge voxelization?
maxStep = 3 * mm
self._userLimits = G4UserLimits(maxStep)
world_l.SetUserLimits(self._userLimits)
# Return world volume
return world_p
###################################################################
# GENIE port
class MyGenieEvtGeneratorAction(G4VUserPrimaryGeneratorAction):
"Generator based on RooTracker input data"
def __init__(self, genieEvtFilename, treebuffer, ofile):
G4VUserPrimaryGeneratorAction.__init__(self)
self.isInitialized = False
self.inputFile = genieEvtFilename
self.hepEvts = None
self.currentEventIdx = 0
self._tb = treebuffer
self._ofile = ofile
return
def initialize(self):
# Prepare generator
ifile = TFile(self.inputFile, 'READ')
datatree = ifile.Get('gRooTracker')
self._ofile.cd()
print 'GENIE Generator: Loaded Tree with %d events from %s' % (
datatree.GetEntries(), self.inputFile)
self.hepEvts = self.parseGenieEvts(datatree)
self.isInitialized = True
return
def parseGenieEvts(self,datatree):
'''Parse GENIE input data'''
hepEvts = []
entry_count = 0
while entry_count < self._tb.nevents:
datatree.GetEntry(entry_count)
currentEvent = {}
currentEvent['event_num'] = datatree.EvtNum
n_particles = datatree.StdHepN
currentEvent['particles'] = []
#event position in meters
evt_pos = [datatree.EvtVtx[0],
datatree.EvtVtx[1],
datatree.EvtVtx[2]]
#retuns lists: info[particle]
status = datatree.StdHepStatus
pdg = datatree.StdHepPdg
first_parent = datatree.StdHepFm
first_child = datatree.StdHepFd
last_parent = datatree.StdHepLm
last_child = datatree.StdHepLd
#funky nested list stuff
p4 = datatree.StdHepP4
p4_shaped = np.reshape(p4, (len(p4)/4,4) )
q4 = datatree.StdHepX4
q4_shaped = np.reshape(q4, (len(p4)/4,4) )
tempcode = bytearray(51)
tempcode[:51] = ""
# self._tb.code[:51] = ""
event_code = str(datatree.EvtCode).split(';')
counter = 0
for part in event_code:
if 'proc' in part:
this_code = part + ';' + event_code[counter+1]
# self._tb.code[:len(this_code)+1] = part + ';' + event_code[counter + 1]
tempcode[:len(this_code)+1] = part + ';' + event_code[counter + 1]
self._tb.codemap[datatree.EvtNum] = tempcode
# print self._tb.code
counter = counter + 1
for npart in range(datatree.StdHepN):
if ( status[npart] > 1 ):
n_particles = n_particles - 1
continue
if ( status[npart] == 0 ):
if ( abs(pdg[npart]) == 12 or abs(pdg[npart]) == 14 ):
print 'Found intial state neutrino'
else:
n_particles = n_particles - 1
print 'initial state', abs(pdg[npart])
continue
px = p4_shaped[npart][0]
py = p4_shaped[npart][1]
pz = p4_shaped[npart][2]
E = p4_shaped[npart][3]
p2 = px**2 + py**2 + pz**2
x = (evt_pos[0]*10**3 + q4_shaped[npart][0]*(10**-9) + self._tb.shift*10.)*mm #shifting over for events
y = (evt_pos[1]*10**3 + q4_shaped[npart][1]*(10**-9))*mm
z = (evt_pos[2]*10**3 + q4_shaped[npart][2]*(10**-9))*mm
t = q4_shaped[npart][3]*(10**-9)*mm/c_light
if (E*E - p2) < 0:
m = 0
else:
m = sqrt(E*E - p2)
particle = {
'index':npart, #is this right?
'status':status[npart],
'pdgid':pdg[npart],
'first_parent':first_parent[npart],
'first_child':first_child[npart],
'last_parent':last_parent[npart],
'last_child':last_child[npart],
'momentum':[px*GeV, py*GeV, pz*GeV],
'energy':E*GeV,
'mass':m*GeV,
'position':[x, y, z],
'time':t,
}
currentEvent['n_particles'] = n_particles
currentEvent['particles'].append(particle)
hepEvts.append( copy(currentEvent) )
entry_count = entry_count + 1
# for entry in datatree:
# currentEvent = {}
# self._tb.code = ""
# currentEvent['event_num'] = entry.EvtNum
# n_particles = entry.StdHepN
# currentEvent['particles'] = []
#
# #event position in meters
# evt_pos = [entry.EvtVtx[0],
# entry.EvtVtx[1],
# entry.EvtVtx[2]]
#
# #retuns lists: info[particle]
# status = entry.StdHepStatus
# pdg = entry.StdHepPdg
# first_parent = entry.StdHepFm
# first_child = entry.StdHepFd
# last_parent = entry.StdHepLm
# last_child = entry.StdHepLd
#
# #funky nested list stuff
# p4 = entry.StdHepP4
# p4_shaped = np.reshape(p4, (len(p4)/4,4) )
#
# q4 = entry.StdHepX4
# q4_shaped = np.reshape(q4, (len(p4)/4,4) )
#
# event_code = str(entry.EvtCode).split(';')
# counter = 0
# for part in event_code:
# if 'proc' in part:
# self._tb.code = part + ';' + event_code[counter + 1]
# print part + ';' + event_code[counter + 1]
# print self._tb.code
# counter = counter + 1
#
# for npart in range(entry.StdHepN):
## print npart, status[npart], pdg[npart]
# if ( status[npart] > 1 ):
## print 'Other state', pdg[npart]
## if ( (abs(pdg[npart]) != 14) or (abs(pdg[npart]) != 12) ):
## print 'not inital neutrino or final state. skipping'
# n_particles = n_particles - 1
# continue
# if ( status[npart] == 0 ):
# if ( abs(pdg[npart]) == 12 or abs(pdg[npart]) == 14 ):
# print 'Found intial state neutrino'
# else:
# n_particles = n_particles - 1
# print 'initial state', abs(pdg[npart])
# continue
# px = p4_shaped[npart][0]
# py = p4_shaped[npart][1]
# pz = p4_shaped[npart][2]
# E = p4_shaped[npart][3]
# p2 = px**2 + py**2 + pz**2
#
# x = (evt_pos[0]*10**3 + q4_shaped[npart][0]*(10**-9) + self._tb.shift*10.)*mm #shifting over for events
# y = (evt_pos[1]*10**3 + q4_shaped[npart][1]*(10**-9))*mm
# z = (evt_pos[2]*10**3 + q4_shaped[npart][2]*(10**-9))*mm
# t = q4_shaped[npart][3]*(10**-9)*mm/c_light
#
#
# if (E*E - p2) < 0:
# m = 0
# else:
# m = sqrt(E*E - p2)
#
# particle = {
# 'index':npart, #is this right?
# 'status':status[npart],
# 'pdgid':pdg[npart],
# 'first_parent':first_parent[npart],
# 'first_child':first_child[npart],
# 'last_parent':last_parent[npart],
# 'last_child':last_child[npart],
# 'momentum':[px*GeV, py*GeV, pz*GeV],
# 'energy':E*GeV,
# 'mass':m*GeV,
# 'position':[x, y, z],
# 'time':t,
# }
# currentEvent['n_particles'] = n_particles
# currentEvent['particles'].append(particle)
# hepEvts.append( copy(currentEvent) )
return hepEvts
def GeneratePrimaries(self, event):
if not self.isInitialized:
self.initialize()
if self.currentEventIdx > len(self.hepEvts):
print ('Error: No more HepEVT data! (max events=%d)'
% self.currentEventIdx)
return event
currentEvt = self.hepEvts[self.currentEventIdx]
self._tb.ancestor = None
# Set default position and time to zero
time = 0
finalStateParticles = []
for heppart in currentEvt['particles']:
status = heppart['status']
if status not in [0,1]:
# ignore all but initial, final state particles
# FIXME: should probably throw a warning
continue
heppos = heppart['position']
hepmom = heppart['momentum']
if status == 0:
# Initial state particle. Add info to event tree
self._tb.ancestor = heppart
elif status == 1:
# Final state particle. Add to event
position = G4ThreeVector(heppos[0],heppos[1],heppos[2])
particle = G4PrimaryParticle(heppart['pdgid'])
particle.Set4Momentum(hepmom[0],hepmom[1],hepmom[2],
heppart['energy'])
# Ensure mass is exact
particle.SetMass(heppart['mass'])
finalStateParticles.append([particle, position, time])
for [particle, position, time] in finalStateParticles:
vertex = G4PrimaryVertex(position, time)
vertex.SetPrimary(particle)
event.AddPrimaryVertex(vertex)
self.currentEventIdx += 1
# ------------------------------------------------------------------
class MyRunAction(G4UserRunAction):
"My Run Action"
def EndOfRunAction(self, run):
print "*** End of Run"
print "- Run sammary : (id= %d, #events= %d)" \
% (run.GetRunID(), run.GetNumberOfEventToBeProcessed())
# ------------------------------------------------------------------
class MyEventAction(G4UserEventAction):
"My Event Action"
def __init__(self, treebuffer, outputtree):
'''Constructor'''
G4UserEventAction.__init__(self)
self._tb = treebuffer
self._otree = outputtree
def BeginOfEventAction(self, event):
self._tb.ev[0] = -1
self._tb.pida[0] = 0
self._tb.xa[0] = 0
self._tb.ya[0] = 0
self._tb.za[0] = 0
self._tb.ta[0] = 0
self._tb.pxa[0] = 0
self._tb.pya[0] = 0
self._tb.pza[0] = 0
self._tb.ekina[0] = 0
self._tb.ma[0] = 0
self._tb.edep[0] = 0
self._tb.ni[0] = 0
self._tb.nstep[0] = 0
self._tb.nq[0] = 0
return
def EndOfEventAction(self, event):
'''Record event'''
tb = self._tb
# Event ID
tb.ev[0] = event.GetEventID()
tb.code[:51] = ""
tb.code[:len(tb.codemap[event.GetEventID()])+1] = tb.codemap[event.GetEventID()]
print tb.code
print len(tb.code)
# Ancestor particle (e.g. neutrino)
if tb.ancestor != None:
# Log info
heppart = tb.ancestor
tb.pida[0] = heppart['pdgid']
heppos = heppart['position']
hepmom = heppart['momentum']
tb.xa[0] = (heppos[0] - tb.shift*10.)/ cm
tb.ya[0] = heppos[1] / cm
tb.za[0] = heppos[2] / cm
tb.ta[0] = heppart['time'] / ns
tb.pxa[0] = hepmom[0] / GeV
tb.pya[0] = hepmom[1] / GeV
tb.pza[0] = hepmom[2] / GeV
tb.ekina[0] = (heppart['energy'] - heppart['mass']) / GeV
tb.ma[0] = heppart['mass'] / GeV
# Primary particles
ni = 0
for pv_idx in range(event.GetNumberOfPrimaryVertex()):
pvtx = event.GetPrimaryVertex(pv_idx)
for pp_idx in range(pvtx.GetNumberOfParticle()):
ppart = pvtx.GetPrimary(pp_idx)
tb.pidi[ni] = ppart.GetPDGcode()
tb.xi[ni] = (pvtx.GetX0() - tb.shift*10.) / cm
tb.yi[ni] = pvtx.GetY0() / cm
tb.zi[ni] = pvtx.GetZ0() / cm
tb.ti[ni] = pvtx.GetT0() / ns
tb.pxi[ni] = ppart.GetPx() / GeV
tb.pyi[ni] = ppart.GetPy() / GeV
tb.pzi[ni] = ppart.GetPz() / GeV
# Ick, G4py interface doesn't provide particle energy func :/
pmomSq = ppart.GetPx()**2 + ppart.GetPy()**2 + ppart.GetPz()**2
pmass = ppart.GetMass()
penergy = sqrt(pmomSq + pmass**2)
tb.ekini[ni] = (penergy - pmass) / GeV
tb.mi[ni] = pmass / GeV
ni += 1
if ni == tb.maxInit:
print "Warning: Reached max number of initial particles."
break
tb.ni[0] = ni
self._otree.Fill()
return
# ------------------------------------------------------------------
class MySteppingAction(G4UserSteppingAction):
"My Stepping Action"
def __init__(self, treebuffer, geometry, materials, edepsim, edepstep):
'''Constructor'''
G4UserSteppingAction.__init__(self)
self._tb = treebuffer
self._geom = geometry
self._materials = materials
self._include_edepsim = edepsim
self._edep_step = edepstep
def UserSteppingAction(self, step):
'''Collect data for current simulation step'''
tb = self._tb
istp = tb.nstep[0]
if istp>=tb.maxTracks:
print 'Reached maximum tracks:',istp
return
track = step.GetTrack()
prestep = step.GetPreStepPoint()
poststep = step.GetPostStepPoint()
tb.tid[istp] = track.GetTrackID()
tb.pid[istp] = track.GetDefinition().GetPDGEncoding()
tb.parid[istp] = track.GetParentID()
tb.ekin[istp] = prestep.GetKineticEnergy() / GeV
# Sum simulated energy deposition by volume
tb.edep[istp] = step.GetTotalEnergyDeposit() / GeV
# Capture step position
prepos = prestep.GetPosition()
postpos = poststep.GetPosition()
tb.xs[istp] = (prepos.x - tb.shift*10.) / cm
tb.ys[istp] = prepos.y / cm
tb.zs[istp] = prepos.z / cm
tb.xe[istp] = (postpos.x - tb.shift*10.) / cm
tb.ye[istp] = postpos.y / cm
tb.ze[istp] = postpos.z / cm
tb.te[istp] = poststep.GetGlobalTime() / ns
# Add in momentum
premom = prestep.GetMomentum()
postmom = poststep.GetMomentum()
tb.pxs[istp] = premom.x / GeV
tb.pys[istp] = premom.y / GeV
tb.pzs[istp] = premom.z / GeV
tb.pxe[istp] = postmom.x / GeV
tb.pye[istp] = postmom.y / GeV
tb.pze[istp] = postmom.z / GeV
tb.nstep[0] += 1
if not self._include_edepsim:
# Stop here, unless simple energy deposition simulation is enabled
return
# Arrrgghhh! no python hook to non-ionizing energy deposit...
#eIon = step.GetTotalEnergyDeposit()-step.GetNonIonizingEnergyDeposit()
eIon = step.GetTotalEnergyDeposit()
if track.GetDefinition().GetPDGCharge() != 0.0 and eIon > 0:
deltaPos = postpos - prepos
iq = tb.nq[0]
dnq = int(deltaPos.mag() / self._edep_step)
drq = G4ThreeVector(deltaPos)
drq.setMag(self._edep_step)
for qidx in range(dnq):
curpos = prepos + qidx * drq
tb.tidq[iq+qidx] = track.GetTrackID()
tb.pidq[iq+qidx] = track.GetDefinition().GetPDGEncoding()
tb.sidq[iq+qidx] = istp
tb.dq[iq+qidx] = (eIon / dnq) / MeV
tb.xq[iq+qidx] = (curpos.x - tb.shift*10.) / cm
tb.yq[iq+qidx] = curpos.y / cm
tb.zq[iq+qidx] = curpos.z / cm
tb.nq[0] += dnq
return
###################################################################
if '__main__' == __name__:
# Run the simulation
print "Running simulation"
mysim = MySimulation()
mysim.initialize()
mysim.run()
mysim.finalize()