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geant4/source/processes/electromagnetic/utils/src/G4VEmProcess.cc
T
Gabriele Cosmo a8e9364cea Import Geant4 9.0.0 source tree
2016-06-09 15:16:48 +02:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4VEmProcess.cc,v 1.40 2007/05/23 08:43:46 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-00 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name: G4VEmProcess
//
// Author: Vladimir Ivanchenko on base of Laszlo Urban code
//
// Creation date: 01.10.2003
//
// Modifications:
// 30-06-04 make it to be pure discrete process (V.Ivanchenko)
// 30-09-08 optimise integral option (V.Ivanchenko)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivanchenko)
// 11-03-05 Shift verbose level by 1, add applyCuts and killPrimary flags (VI)
// 14-03-05 Update logic PostStepDoIt (V.Ivanchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivanchenko)
// 18-04-05 Use G4ParticleChangeForGamma (V.Ivanchenko)
// 25-07-05 Add protection: integral mode only for charged particles (VI)
// 04-09-05 default lambdaFactor 0.8 (V.Ivanchenko)
// 11-01-06 add A to parameters of ComputeCrossSectionPerAtom (VI)
// 12-09-06 add SetModel() (mma)
// 12-04-07 remove double call to Clear model manager (V.Ivanchenko)
//
// Class Description:
//
// -------------------------------------------------------------------
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#include "G4VEmProcess.hh"
#include "G4LossTableManager.hh"
#include "G4Step.hh"
#include "G4ParticleDefinition.hh"
#include "G4VEmModel.hh"
#include "G4DataVector.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsVector.hh"
#include "G4PhysicsLogVector.hh"
#include "G4VParticleChange.hh"
#include "G4ProductionCutsTable.hh"
#include "G4Region.hh"
#include "G4RegionStore.hh"
#include "G4Gamma.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4PhysicsTableHelper.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4VEmProcess::G4VEmProcess(const G4String& name, G4ProcessType type):
G4VDiscreteProcess(name, type),
selectedModel(0),
theLambdaTable(0),
theEnergyOfCrossSectionMax(0),
theCrossSectionMax(0),
particle(0),
secondaryParticle(0),
nLambdaBins(90),
lambdaFactor(0.8),
currentCouple(0),
integral(false),
buildLambdaTable(true),
applyCuts(false),
startFromNull(true),
nRegions(0)
{
SetVerboseLevel(1);
minKinEnergy = 0.1*keV;
maxKinEnergy = 100.0*GeV;
theGamma = G4Gamma::Gamma();
theElectron = G4Electron::Electron();
thePositron = G4Positron::Positron();
pParticleChange = &fParticleChange;
secParticles.reserve(5);
modelManager = new G4EmModelManager();
(G4LossTableManager::Instance())->Register(this);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4VEmProcess::~G4VEmProcess()
{
if(1 < verboseLevel)
G4cout << "G4VEmProcess destruct " << GetProcessName()
<< G4endl;
Clear();
if(theLambdaTable) theLambdaTable->clearAndDestroy();
delete modelManager;
(G4LossTableManager::Instance())->DeRegister(this);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::PreparePhysicsTable(const G4ParticleDefinition& part)
{
if(!particle) particle = &part;
if(1 < verboseLevel) {
G4cout << "G4VEmProcess::PreparePhysicsTable() for "
<< GetProcessName()
<< " and particle " << part.GetParticleName()
<< " local particle " << particle->GetParticleName()
<< G4endl;
}
if(particle == &part) {
Clear();
InitialiseProcess(particle);
theCutsGamma =
modelManager->Initialise(particle,secondaryParticle,2.,verboseLevel);
const G4ProductionCutsTable* theCoupleTable=
G4ProductionCutsTable::GetProductionCutsTable();
theCutsGamma = theCoupleTable->GetEnergyCutsVector(idxG4GammaCut);
theCutsElectron = theCoupleTable->GetEnergyCutsVector(idxG4ElectronCut);
theCutsPositron = theCoupleTable->GetEnergyCutsVector(idxG4PositronCut);
if(buildLambdaTable)
theLambdaTable = G4PhysicsTableHelper::PreparePhysicsTable(theLambdaTable);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::Clear()
{
if(theEnergyOfCrossSectionMax) delete [] theEnergyOfCrossSectionMax;
if(theCrossSectionMax) delete [] theCrossSectionMax;
theEnergyOfCrossSectionMax = 0;
theCrossSectionMax = 0;
currentCouple = 0;
preStepLambda = 0.0;
mfpKinEnergy = DBL_MAX;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::BuildPhysicsTable(const G4ParticleDefinition& part)
{
if(1 < verboseLevel) {
G4cout << "G4VEmProcess::BuildPhysicsTable() for "
<< GetProcessName()
<< " and particle " << part.GetParticleName()
<< " buildLambdaTable= " << buildLambdaTable
<< G4endl;
}
if(buildLambdaTable) {
BuildLambdaTable();
FindLambdaMax();
}
if(0 < verboseLevel) PrintInfoDefinition();
if(1 < verboseLevel) {
G4cout << "G4VEmProcess::BuildPhysicsTable() done for "
<< GetProcessName()
<< " and particle " << part.GetParticleName()
<< G4endl;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::BuildLambdaTable()
{
if(1 < verboseLevel) {
G4cout << "G4EmProcess::BuildLambdaTable() for process "
<< GetProcessName() << " and particle "
<< particle->GetParticleName()
<< G4endl;
}
// Access to materials
const G4ProductionCutsTable* theCoupleTable=
G4ProductionCutsTable::GetProductionCutsTable();
size_t numOfCouples = theCoupleTable->GetTableSize();
for(size_t i=0; i<numOfCouples; i++) {
if (theLambdaTable->GetFlag(i)) {
// create physics vector and fill it
const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i);
G4PhysicsVector* aVector = LambdaPhysicsVector(couple);
modelManager->FillLambdaVector(aVector, couple, startFromNull);
G4PhysicsTableHelper::SetPhysicsVector(theLambdaTable, i, aVector);
}
}
if(1 < verboseLevel) {
G4cout << "Lambda table is built for "
<< particle->GetParticleName()
<< G4endl;
if(2 < verboseLevel) {
G4cout << *theLambdaTable << G4endl;
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::AddEmModel(G4int order, G4VEmModel* p,
const G4Region* region)
{
modelManager->AddEmModel(order, p, 0, region);
if(p) p->SetParticleChange(pParticleChange);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4VParticleChange* G4VEmProcess::PostStepDoIt(const G4Track& track,
const G4Step&)
{
fParticleChange.InitializeForPostStep(track);
// Do not make anything if particle is stopped, the annihilation then
// should be performed by the AtRestDoIt!
if (track.GetTrackStatus() == fStopButAlive) return &fParticleChange;
G4double finalT = track.GetKineticEnergy();
// Integral approach
if (integral) {
G4double lx = GetLambda(finalT, currentCouple);
if(preStepLambda<lx && 1 < verboseLevel) {
G4cout << "WARING: for " << particle->GetParticleName()
<< " and " << GetProcessName()
<< " E(MeV)= " << finalT/MeV
<< " preLambda= " << preStepLambda << " < " << lx << " (postLambda) "
<< G4endl;
}
if(preStepLambda*G4UniformRand() > lx) {
ClearNumberOfInteractionLengthLeft();
return &fParticleChange;
}
}
G4VEmModel* currentModel = SelectModel(finalT);
/*
if(0 < verboseLevel) {
G4cout << "G4VEmProcess::PostStepDoIt: Sample secondary; E= "
<< finalT/MeV
<< " MeV; model= (" << currentModel->LowEnergyLimit()
<< ", " << currentModel->HighEnergyLimit() << ")"
<< G4endl;
}
*/
// sample secondaries
secParticles.clear();
currentModel->SampleSecondaries(&secParticles,
currentCouple,
track.GetDynamicParticle());
// save secondaries
G4int num = secParticles.size();
if(num > 0) {
fParticleChange.SetNumberOfSecondaries(num);
G4double edep = fParticleChange.GetLocalEnergyDeposit();
for (G4int i=0; i<num; i++) {
G4DynamicParticle* dp = secParticles[i];
const G4ParticleDefinition* p = dp->GetDefinition();
G4double e = dp->GetKineticEnergy();
G4bool good = true;
if(applyCuts) {
if (p == theGamma) {
if (e < (*theCutsGamma)[currentMaterialIndex]) good = false;
} else if (p == theElectron) {
if (e < (*theCutsElectron)[currentMaterialIndex]) good = false;
} else if (p == thePositron) {
if (e < (*theCutsPositron)[currentMaterialIndex]) {
good = false;
e += 2.0*electron_mass_c2;
}
}
if(!good) {
delete dp;
edep += e;
}
}
if (good) fParticleChange.AddSecondary(dp);
}
fParticleChange.ProposeLocalEnergyDeposit(edep);
}
ClearNumberOfInteractionLengthLeft();
return &fParticleChange;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::PrintInfoDefinition()
{
if(verboseLevel > 0) {
G4cout << G4endl << GetProcessName() << ": " ;
PrintInfo();
if(integral) {
G4cout << " Integral mode is used "<< G4endl;
}
}
if (!buildLambdaTable) return;
if(verboseLevel > 0) {
G4cout << " tables are built for "
<< particle->GetParticleName()
<< G4endl
<< " Lambda tables from "
<< G4BestUnit(minKinEnergy,"Energy")
<< " to "
<< G4BestUnit(maxKinEnergy,"Energy")
<< " in " << nLambdaBins << " bins."
<< G4endl;
}
if(verboseLevel > 1) {
G4cout << "Tables are built for " << particle->GetParticleName()
<< G4endl;
if(verboseLevel > 2) {
G4cout << "LambdaTable address= " << theLambdaTable << G4endl;
if(theLambdaTable) G4cout << (*theLambdaTable) << G4endl;
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4VEmProcess::MicroscopicCrossSection(G4double kineticEnergy,
const G4MaterialCutsCouple* couple)
{
// Cross section per atom is calculated
DefineMaterial(couple);
G4double cross = 0.0;
G4bool b;
if(theLambdaTable) {
cross = (((*theLambdaTable)[currentMaterialIndex])->
GetValue(kineticEnergy, b));
cross /= currentMaterial->GetTotNbOfAtomsPerVolume();
} else {
G4VEmModel* model = SelectModel(kineticEnergy);
cross =
model->CrossSectionPerVolume(currentMaterial,particle,kineticEnergy);
}
return cross;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4bool G4VEmProcess::StorePhysicsTable(const G4ParticleDefinition* part,
const G4String& directory,
G4bool ascii)
{
G4bool yes = true;
if ( theLambdaTable && part == particle) {
const G4String name =
GetPhysicsTableFileName(part,directory,"Lambda",ascii);
yes = theLambdaTable->StorePhysicsTable(name,ascii);
if ( yes ) {
G4cout << "Physics tables are stored for " << particle->GetParticleName()
<< " and process " << GetProcessName()
<< " in the directory <" << directory
<< "> " << G4endl;
} else {
G4cout << "Fail to store Physics Tables for "
<< particle->GetParticleName()
<< " and process " << GetProcessName()
<< " in the directory <" << directory
<< "> " << G4endl;
}
}
return yes;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
G4bool G4VEmProcess::RetrievePhysicsTable(const G4ParticleDefinition* part,
const G4String& directory,
G4bool ascii)
{
if(1 < verboseLevel) {
G4cout << "G4VEmProcess::RetrievePhysicsTable() for "
<< part->GetParticleName() << " and process "
<< GetProcessName() << G4endl;
}
G4bool yes = true;
if(!buildLambdaTable || particle != part) return yes;
const G4String particleName = part->GetParticleName();
G4String filename;
filename = GetPhysicsTableFileName(part,directory,"Lambda",ascii);
yes = G4PhysicsTableHelper::RetrievePhysicsTable(theLambdaTable,
filename,ascii);
if ( yes ) {
if (0 < verboseLevel) {
G4cout << "Lambda table for " << particleName << " is Retrieved from <"
<< filename << ">"
<< G4endl;
}
} else {
if (1 < verboseLevel) {
G4cout << "Lambda table for " << particleName << " in file <"
<< filename << "> is not exist"
<< G4endl;
}
}
return yes;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4VEmProcess::FindLambdaMax()
{
if(1 < verboseLevel) {
G4cout << "### G4VEmProcess::FindLambdaMax: "
<< particle->GetParticleName()
<< " and process " << GetProcessName() << G4endl;
}
size_t n = theLambdaTable->length();
G4PhysicsVector* pv = (*theLambdaTable)[0];
G4double e, s, emax, smax;
theEnergyOfCrossSectionMax = new G4double [n];
theCrossSectionMax = new G4double [n];
G4bool b;
for (size_t i=0; i<n; i++) {
pv = (*theLambdaTable)[i];
emax = DBL_MAX;
smax = 0.0;
if(pv) {
size_t nb = pv->GetVectorLength();
emax = pv->GetLowEdgeEnergy(nb);
smax = 0.0;
for (size_t j=0; j<nb; j++) {
e = pv->GetLowEdgeEnergy(j);
s = pv->GetValue(e,b);
if(s > smax) {
smax = s;
emax = e;
}
}
}
theEnergyOfCrossSectionMax[i] = emax;
theCrossSectionMax[i] = smax;
if(2 < verboseLevel) {
G4cout << "For " << particle->GetParticleName()
<< " Max CS at i= " << i << " emax(MeV)= " << emax/MeV
<< " lambda= " << smax << G4endl;
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4PhysicsVector* G4VEmProcess::LambdaPhysicsVector(const G4MaterialCutsCouple*)
{
G4PhysicsVector* v =
new G4PhysicsLogVector(minKinEnergy, maxKinEnergy, nLambdaBins);
return v;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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