Import Geant4 9.3.0 source tree
This commit is contained in:
Gabriele Cosmo
@@ -0,0 +1,363 @@
|
||||
//
|
||||
// ********************************************************************
|
||||
// * 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: G4AdjointIonIonisationModel.cc,v 1.2 2009/11/20 10:31:20 ldesorgh Exp $
|
||||
// GEANT4 tag $Name: geant4-09-03 $
|
||||
//
|
||||
#include "G4AdjointIonIonisationModel.hh"
|
||||
#include "G4AdjointCSManager.hh"
|
||||
|
||||
|
||||
#include "G4Integrator.hh"
|
||||
#include "G4TrackStatus.hh"
|
||||
#include "G4ParticleChange.hh"
|
||||
#include "G4AdjointElectron.hh"
|
||||
#include "G4AdjointProton.hh"
|
||||
#include "G4AdjointInterpolator.hh"
|
||||
#include "G4BetheBlochModel.hh"
|
||||
#include "G4BraggIonModel.hh"
|
||||
#include "G4Proton.hh"
|
||||
#include "G4GenericIon.hh"
|
||||
#include "G4NistManager.hh"
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4AdjointIonIonisationModel::G4AdjointIonIonisationModel():
|
||||
G4VEmAdjointModel("Adjoint_IonIonisation")
|
||||
{
|
||||
|
||||
|
||||
UseMatrix =true;
|
||||
UseMatrixPerElement = true;
|
||||
ApplyCutInRange = true;
|
||||
UseOnlyOneMatrixForAllElements = true;
|
||||
CS_biasing_factor =1.;
|
||||
second_part_of_same_type =false;
|
||||
use_only_bragg = false; // for the Ion ionisation using the parametrised table model the cross sections and the sample of secondaries is done
|
||||
// as in the BraggIonModel, Therefore the use of this flag;
|
||||
|
||||
//The direct EM Model is taken has BetheBloch it is only used for the computation
|
||||
// of the differential cross section.
|
||||
//The Bragg model could be used as an alternative as it offers the same differential cross section
|
||||
|
||||
theBetheBlochDirectEMModel = new G4BetheBlochModel(G4GenericIon::GenericIon());
|
||||
theBraggIonDirectEMModel = new G4BraggIonModel(G4GenericIon::GenericIon());
|
||||
theAdjEquivOfDirectSecondPartDef=G4AdjointElectron::AdjointElectron();
|
||||
theDirectPrimaryPartDef =0;
|
||||
theAdjEquivOfDirectPrimPartDef =0;
|
||||
/* theDirectPrimaryPartDef =fwd_ion;
|
||||
theAdjEquivOfDirectPrimPartDef =adj_ion;
|
||||
|
||||
DefineProjectileProperty();*/
|
||||
|
||||
|
||||
|
||||
|
||||
}
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4AdjointIonIonisationModel::~G4AdjointIonIonisationModel()
|
||||
{;}
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
void G4AdjointIonIonisationModel::SampleSecondaries(const G4Track& aTrack,
|
||||
G4bool IsScatProjToProjCase,
|
||||
G4ParticleChange* fParticleChange)
|
||||
{
|
||||
const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
|
||||
|
||||
//Elastic inverse scattering
|
||||
//---------------------------------------------------------
|
||||
G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
|
||||
G4double adjointPrimP =theAdjointPrimary->GetTotalMomentum();
|
||||
|
||||
if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
|
||||
return;
|
||||
}
|
||||
|
||||
//Sample secondary energy
|
||||
//-----------------------
|
||||
G4double projectileKinEnergy = SampleAdjSecEnergyFromCSMatrix(adjointPrimKinEnergy, IsScatProjToProjCase);
|
||||
CorrectPostStepWeight(fParticleChange,
|
||||
aTrack.GetWeight(),
|
||||
adjointPrimKinEnergy,
|
||||
projectileKinEnergy,
|
||||
IsScatProjToProjCase); //Caution !!!this weight correction should be always applied
|
||||
|
||||
|
||||
//Kinematic:
|
||||
//we consider a two body elastic scattering for the forward processes where the projectile knock on an e- at rest and gives
|
||||
// him part of its energy
|
||||
//----------------------------------------------------------------------------------------
|
||||
|
||||
G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
|
||||
G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
|
||||
G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;
|
||||
|
||||
|
||||
|
||||
//Companion
|
||||
//-----------
|
||||
G4double companionM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
|
||||
if (IsScatProjToProjCase) {
|
||||
companionM0=theAdjEquivOfDirectSecondPartDef->GetPDGMass();
|
||||
}
|
||||
G4double companionTotalEnergy =companionM0+ projectileKinEnergy-adjointPrimKinEnergy;
|
||||
G4double companionP2 = companionTotalEnergy*companionTotalEnergy - companionM0*companionM0;
|
||||
|
||||
|
||||
//Projectile momentum
|
||||
//--------------------
|
||||
G4double P_parallel = (adjointPrimP*adjointPrimP + projectileP2 - companionP2)/(2.*adjointPrimP);
|
||||
G4double P_perp = std::sqrt( projectileP2 - P_parallel*P_parallel);
|
||||
G4ThreeVector dir_parallel=theAdjointPrimary->GetMomentumDirection();
|
||||
G4double phi =G4UniformRand()*2.*3.1415926;
|
||||
G4ThreeVector projectileMomentum = G4ThreeVector(P_perp*std::cos(phi),P_perp*std::sin(phi),P_parallel);
|
||||
projectileMomentum.rotateUz(dir_parallel);
|
||||
|
||||
|
||||
|
||||
if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
|
||||
fParticleChange->ProposeTrackStatus(fStopAndKill);
|
||||
fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
|
||||
//G4cout<<"projectileMomentum "<<projectileMomentum<<G4endl;
|
||||
}
|
||||
else {
|
||||
fParticleChange->ProposeEnergy(projectileKinEnergy);
|
||||
fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4double G4AdjointIonIonisationModel::DiffCrossSectionPerAtomPrimToSecond(
|
||||
G4double kinEnergyProj,
|
||||
G4double kinEnergyProd,
|
||||
G4double Z,
|
||||
G4double A)
|
||||
{//Probably that here the Bragg Model should be also used for kinEnergyProj/nuc<2MeV
|
||||
|
||||
|
||||
|
||||
G4double dSigmadEprod=0;
|
||||
G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(kinEnergyProd);
|
||||
G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(kinEnergyProd);
|
||||
|
||||
G4double kinEnergyProjScaled = massRatio*kinEnergyProj;
|
||||
|
||||
|
||||
if (kinEnergyProj>Emin_proj && kinEnergyProj<=Emax_proj){ //the produced particle should have a kinetic energy smaller than the projectile
|
||||
G4double Tmax=kinEnergyProj;
|
||||
|
||||
G4double E1=kinEnergyProd;
|
||||
G4double E2=kinEnergyProd*1.000001;
|
||||
G4double dE=(E2-E1);
|
||||
G4double sigma1,sigma2;
|
||||
theDirectEMModel =theBraggIonDirectEMModel;
|
||||
if (kinEnergyProjScaled >2.*MeV && !use_only_bragg) theDirectEMModel = theBetheBlochDirectEMModel; //Bethe Bloch Model
|
||||
sigma1=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,Z,A ,E1,1.e20);
|
||||
sigma2=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,Z,A ,E2,1.e20);
|
||||
|
||||
dSigmadEprod=(sigma1-sigma2)/dE;
|
||||
|
||||
//G4double chargeSqRatio = currentModel->GetChargeSquareRatio(theDirectPrimaryPartDef,currentMaterial,E);
|
||||
|
||||
|
||||
|
||||
if (dSigmadEprod>1.) {
|
||||
G4cout<<"sigma1 "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<sigma1<<G4endl;
|
||||
G4cout<<"sigma2 "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<sigma2<<G4endl;
|
||||
G4cout<<"dsigma "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<dSigmadEprod<<G4endl;
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
if (theDirectEMModel == theBetheBlochDirectEMModel ){
|
||||
//correction of differential cross section at high energy to correct for the suppression of particle at secondary at high
|
||||
//energy used in the Bethe Bloch Model. This correction consist to multiply by g the probability function used
|
||||
//to test the rejection of a secondary
|
||||
//-------------------------
|
||||
|
||||
//Source code taken from G4BetheBlochModel::SampleSecondaries
|
||||
|
||||
G4double deltaKinEnergy = kinEnergyProd;
|
||||
|
||||
//Part of the taken code
|
||||
//----------------------
|
||||
|
||||
|
||||
|
||||
// projectile formfactor - suppresion of high energy
|
||||
// delta-electron production at high energy
|
||||
|
||||
|
||||
G4double x = formfact*deltaKinEnergy;
|
||||
if(x > 1.e-6) {
|
||||
G4double totEnergy = kinEnergyProj + mass;
|
||||
G4double etot2 = totEnergy*totEnergy;
|
||||
G4double beta2 = kinEnergyProj*(kinEnergyProj + 2.0*mass)/etot2;
|
||||
G4double f;
|
||||
G4double f1 = 0.0;
|
||||
f = 1.0 - beta2*deltaKinEnergy/Tmax;
|
||||
if( 0.5 == spin ) {
|
||||
f1 = 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
|
||||
f += f1;
|
||||
}
|
||||
G4double x1 = 1.0 + x;
|
||||
G4double g = 1.0/(x1*x1);
|
||||
if( 0.5 == spin ) {
|
||||
G4double x2 = 0.5*electron_mass_c2*deltaKinEnergy/(mass*mass);
|
||||
g *= (1.0 + magMoment2*(x2 - f1/f)/(1.0 + x2));
|
||||
}
|
||||
if(g > 1.0) {
|
||||
G4cout << "### G4BetheBlochModel in Adjoint Sim WARNING: g= " << g
|
||||
<< G4endl;
|
||||
g=1.;
|
||||
}
|
||||
//G4cout<<"g"<<g<<G4endl;
|
||||
dSigmadEprod*=g;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return dSigmadEprod;
|
||||
}
|
||||
//////////////////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
void G4AdjointIonIonisationModel::SetIon(G4ParticleDefinition* adj_ion, G4ParticleDefinition* fwd_ion)
|
||||
{ theDirectPrimaryPartDef =fwd_ion;
|
||||
theAdjEquivOfDirectPrimPartDef =adj_ion;
|
||||
|
||||
DefineProjectileProperty();
|
||||
}
|
||||
//////////////////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
void G4AdjointIonIonisationModel::CorrectPostStepWeight(G4ParticleChange* fParticleChange, G4double old_weight,
|
||||
G4double adjointPrimKinEnergy, G4double projectileKinEnergy,G4bool )
|
||||
{
|
||||
//It is needed because the direct cross section used to compute the differential cross section is not the one used in
|
||||
// the direct model where the GenericIon stuff is considered with correction of effective charge. In the direct model the samnepl of secondaries does
|
||||
// not reflect the integral cross section. The integral fwd cross section that we used to compute the differential CS
|
||||
// match the sample of secondaries in the forward case despite the fact that its is not the same total CS than in the FWD case. For this reasion an extra
|
||||
// weight correction is needed at the end.
|
||||
|
||||
|
||||
G4double new_weight=old_weight;
|
||||
|
||||
//the correction of CS due to the problem explained above
|
||||
G4double kinEnergyProjScaled = massRatio*projectileKinEnergy;
|
||||
theDirectEMModel =theBraggIonDirectEMModel;
|
||||
if (kinEnergyProjScaled >2.*MeV && !use_only_bragg) theDirectEMModel = theBetheBlochDirectEMModel; //Bethe Bloch Model
|
||||
G4double UsedFwdCS=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,projectileKinEnergy,1,1 ,currentTcutForDirectSecond,1.e20);
|
||||
G4double chargeSqRatio =1.;
|
||||
if (chargeSquare>1.) chargeSqRatio = theDirectEMModel->GetChargeSquareRatio(theDirectPrimaryPartDef,currentMaterial,projectileKinEnergy);
|
||||
G4double CorrectFwdCS = chargeSqRatio*theDirectEMModel->ComputeCrossSectionPerAtom(G4GenericIon::GenericIon(),kinEnergyProjScaled,1,1 ,currentTcutForDirectSecond,1.e20);
|
||||
if (UsedFwdCS >0) new_weight*= CorrectFwdCS/UsedFwdCS;//May be some check is needed if UsedFwdCS ==0 probably that then we should avoid a secondary to be produced,
|
||||
|
||||
|
||||
//additional CS crorrection needed for cross section biasing in general.
|
||||
//May be wrong for ions!!! Most of the time not used!
|
||||
G4double w_corr =1./CS_biasing_factor;
|
||||
w_corr*=G4AdjointCSManager::GetAdjointCSManager()->GetPostStepWeightCorrection();
|
||||
new_weight*=w_corr;
|
||||
|
||||
new_weight*=projectileKinEnergy/adjointPrimKinEnergy;
|
||||
|
||||
fParticleChange->SetParentWeightByProcess(false);
|
||||
fParticleChange->SetSecondaryWeightByProcess(false);
|
||||
fParticleChange->ProposeParentWeight(new_weight);
|
||||
}
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
void G4AdjointIonIonisationModel::DefineProjectileProperty()
|
||||
{
|
||||
//Slightly modified code taken from G4BetheBlochModel::SetParticle
|
||||
//------------------------------------------------
|
||||
G4String pname = theDirectPrimaryPartDef->GetParticleName();
|
||||
if (theDirectPrimaryPartDef->GetParticleType() == "nucleus" &&
|
||||
pname != "deuteron" && pname != "triton") {
|
||||
isIon = true;
|
||||
}
|
||||
|
||||
mass = theDirectPrimaryPartDef->GetPDGMass();
|
||||
massRatio= G4GenericIon::GenericIon()->GetPDGMass()/mass;
|
||||
spin = theDirectPrimaryPartDef->GetPDGSpin();
|
||||
G4double q = theDirectPrimaryPartDef->GetPDGCharge()/eplus;
|
||||
chargeSquare = q*q;
|
||||
ratio = electron_mass_c2/mass;
|
||||
ratio2 = ratio*ratio;
|
||||
one_plus_ratio_2=(1+ratio)*(1+ratio);
|
||||
one_minus_ratio_2=(1-ratio)*(1-ratio);
|
||||
G4double magmom = theDirectPrimaryPartDef->GetPDGMagneticMoment()
|
||||
*mass/(0.5*eplus*hbar_Planck*c_squared);
|
||||
magMoment2 = magmom*magmom - 1.0;
|
||||
formfact = 0.0;
|
||||
if(theDirectPrimaryPartDef->GetLeptonNumber() == 0) {
|
||||
G4double x = 0.8426*GeV;
|
||||
if(spin == 0.0 && mass < GeV) {x = 0.736*GeV;}
|
||||
else if(mass > GeV) {
|
||||
x /= G4NistManager::Instance()->GetZ13(mass/proton_mass_c2);
|
||||
// tlimit = 51.2*GeV*A13[iz]*A13[iz];
|
||||
}
|
||||
formfact = 2.0*electron_mass_c2/(x*x);
|
||||
tlimit = 2.0/formfact;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMaxForScatProjToProjCase(G4double PrimAdjEnergy)
|
||||
{
|
||||
G4double Tmax=PrimAdjEnergy*one_plus_ratio_2/(one_minus_ratio_2-2.*ratio*PrimAdjEnergy/mass);
|
||||
return Tmax;
|
||||
}
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMinForScatProjToProjCase(G4double PrimAdjEnergy,G4double Tcut)
|
||||
{ return PrimAdjEnergy+Tcut;
|
||||
}
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMaxForProdToProjCase(G4double )
|
||||
{ return HighEnergyLimit;
|
||||
}
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMinForProdToProjCase(G4double PrimAdjEnergy)
|
||||
{ G4double Tmin= (2*PrimAdjEnergy-4*mass + std::sqrt(4.*PrimAdjEnergy*PrimAdjEnergy +16.*mass*mass + 8.*PrimAdjEnergy*mass*(1/ratio +ratio)))/4.;
|
||||
return Tmin;
|
||||
}
|
||||
Reference in New Issue
Block a user