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geant4/source/processes/electromagnetic/xrays/src/G4ForwardXrayTR.cc
T
Gabriele Cosmo 37fff30d2e Import Geant4 5.0.0 source tree
2016-06-08 16:57:27 +02:00

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//
// ********************************************************************
// * DISCLAIMER *
// * *
// * The following disclaimer summarizes all the specific disclaimers *
// * of contributors to this software. The specific disclaimers,which *
// * govern, are listed with their locations in: *
// * http://cern.ch/geant4/license *
// * *
// * 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. *
// * *
// * This code implementation is the intellectual property of the *
// * GEANT4 collaboration. *
// * By copying, distributing or modifying the Program (or any work *
// * based on the Program) you indicate your acceptance of this *
// * statement, and all its terms. *
// ********************************************************************
//
//
// $Id: G4ForwardXrayTR.cc,v 1.7 2001/10/24 16:40:54 maire Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
// G4ForwardXrayTR class -- implementation file
// GEANT 4 class implementation file --- Copyright CERN 1995
// CERN Geneva Switzerland
// For information related to this code, please, contact
// CERN, CN Division, ASD Group
// History:
// 1st version 11.09.97 V. Grichine (Vladimir.Grichine@cern.ch )
// 2nd version 17.12.97 V. Grichine
// 17-09-01, migration of Materials to pure STL (mma)
#include <math.h>
// #include "G4ios.hh"
// #include <fstream.h>
// #include <stdlib.h>
#include "G4ForwardXrayTR.hh"
#include "G4Material.hh"
#include "globals.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsVector.hh"
#include "G4PhysicsLinearVector.hh"
#include "G4PhysicsLogVector.hh"
// Table initialization
// G4PhysicsTable* G4ForwardXrayTR::fAngleDistrTable = NULL ;
// G4PhysicsTable* G4ForwardXrayTR::fEnergyDistrTable = NULL ;
// Initialization of local constants
G4int G4ForwardXrayTR::fSympsonNumber = 100 ;
G4double G4ForwardXrayTR::fTheMinEnergyTR = 1.0*keV ;
G4double G4ForwardXrayTR::fTheMaxEnergyTR = 100.0*keV ;
G4double G4ForwardXrayTR::fTheMaxAngle = 1.0e-3 ;
G4double G4ForwardXrayTR::fTheMinAngle = 5.0e-6 ;
G4int G4ForwardXrayTR::fBinTR = 50 ;
G4double G4ForwardXrayTR::fMinProtonTkin = 100.0*GeV ;
G4double G4ForwardXrayTR::fMaxProtonTkin = 100.0*TeV ;
G4int G4ForwardXrayTR::fTotBin = 50 ;
// Proton energy vector initialization
G4PhysicsLogVector* G4ForwardXrayTR::
fProtonEnergyVector = new G4PhysicsLogVector(fMinProtonTkin,
fMaxProtonTkin,
fTotBin ) ;
G4double G4ForwardXrayTR::fPlasmaCof = 4.0*pi*fine_structure_const*
hbarc*hbarc*hbarc/electron_mass_c2 ;
G4double G4ForwardXrayTR::fCofTR = fine_structure_const/pi ;
/* ************************************************************************
///////////////////////////////////////////////////////////////////////
//
// Constructor for preparation tables with angle and energy TR distributions
// in all materials involved in test program. Lorentz factors correspond to
// kinetic energies of protons between 100*GeV and 100*TeV, ~ 10^2-10^5
//
// Recommended only for use in applications with
// few light materials involved !!!!!!!!!!!!!!
G4ForwardXrayTR::G4ForwardXrayTR()
: G4TransitionRadiation("XrayTR")
{
G4int iMat, jMat, iTkin, iTR, iPlace ;
static
const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
G4int numOfMat = G4Material::GetNumberOfMaterials();
fGammaCutInKineticEnergy = new G4double[numOfMat] ;
fGammaCutInKineticEnergy = fPtrGamma->GetEnergyCuts() ;
fMatIndex1 = -1 ;
fMatIndex2 = -1 ;
fAngleDistrTable = new G4PhysicsTable(numOfMat*(numOfMat - 1)*fTotBin) ;
fEnergyDistrTable = new G4PhysicsTable(numOfMat*(numOfMat - 1)*fTotBin) ;
G4PhysicsLogVector* aVector = new G4PhysicsLogVector(fMinProtonTkin,
fMaxProtonTkin,
fTotBin ) ;
for(iMat=0;iMat<numOfMat;iMat++) // loop over pairs of different materials
{
for(jMat=0;jMat<numOfMat;jMat++) // transition iMat -> jMat !!!
{
if(iMat == jMat) continue ; // no TR !!
else
{
const G4Material* mat1 = (*theMaterialTable)[iMat] ;
const G4Material* mat2 = (*theMaterialTable)[jMat] ;
fSigma1 = fPlasmaCof*(mat1->GetElectronDensity()) ;
fSigma2 = fPlasmaCof*(mat2->GetElectronDensity()) ;
// fGammaTkinCut = fGammaCutInKineticEnergy[jMat] ; // TR photon in jMat !
fGammaTkinCut = 0.0 ;
if(fGammaTkinCut > fTheMinEnergyTR) // setting of min/max TR energies
{
fMinEnergyTR = fGammaTkinCut ;
}
else
{
fMinEnergyTR = fTheMinEnergyTR ;
}
if(fGammaTkinCut > fTheMaxEnergyTR)
{
fMaxEnergyTR = 2.0*fGammaTkinCut ; // usually very low TR rate
}
else
{
fMaxEnergyTR = fTheMaxEnergyTR ;
}
for(iTkin=0;iTkin<fTotBin;iTkin++) // Lorentz factor loop
{
G4PhysicsLogVector*
energyVector = new G4PhysicsLogVector(fMinEnergyTR,
fMaxEnergyTR,
fBinTR ) ;
G4PhysicsLinearVector*
angleVector = new G4PhysicsLinearVector( 0.0,
fMaxThetaTR,
fBinTR ) ;
G4double energySum = 0.0 ;
G4double angleSum = 0.0 ;
fGamma = 1.0 + (aVector->GetLowEdgeEnergy(iTkin)/proton_mass_c2) ;
fMaxThetaTR = 10000.0/(fGamma*fGamma) ;
if(fMaxThetaTR > fTheMaxAngle)
{
fMaxThetaTR = fTheMaxAngle ;
}
else
{
if(fMaxThetaTR < fTheMinAngle)
{
fMaxThetaTR = fTheMinAngle ;
}
}
energyVector->PutValue(fBinTR-1,energySum) ;
angleVector->PutValue(fBinTR-1,angleSum) ;
for(iTR=fBinTR-2;iTR>=0;iTR--)
{
energySum += fCofTR*EnergySum(energyVector->GetLowEdgeEnergy(iTR),
energyVector->GetLowEdgeEnergy(iTR+1)) ;
angleSum += fCofTR*AngleSum(angleVector->GetLowEdgeEnergy(iTR),
angleVector->GetLowEdgeEnergy(iTR+1)) ;
energyVector->PutValue(iTR,energySum) ;
angleVector->PutValue(iTR,angleSum) ;
}
if(jMat < iMat)
{
iPlace = (iMat*(numOfMat-1)+jMat)*fTotBin+iTkin ;
}
else // jMat > iMat right part of matrices (jMat-1) !
{
iPlace = (iMat*(numOfMat-1)+jMat-1)*fTotBin+iTkin ;
}
fEnergyDistrTable->insertAt(iPlace,energyVector) ;
fAngleDistrTable->insertAt(iPlace,angleVector) ;
} // iTkin
} // jMat != iMat
} // jMat
} // iMat
}
**************************************************************** */
//////////////////////////////////////////////////////////////////////
//
// Constructor for creation of physics tables (angle and energy TR
// distributions) for a couple of selected materials.
//
// Recommended for use in applications with many materials involved,
// when only few (usually couple) materials are interested for generation
// of TR on the interface between them
G4ForwardXrayTR::
G4ForwardXrayTR( const G4String& matName1, // G4Material* pMat1,
const G4String& matName2, // G4Material* pMat2,
const G4String& processName )
: G4TransitionRadiation(processName)
{
// fMatIndex1 = pMat1->GetIndex() ;
// fMatIndex2 = pMat2->GetIndex() ;
G4int iMat;
static
const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable() ;
G4int numOfMat = G4Material::GetNumberOfMaterials();
for(iMat=0;iMat<numOfMat;iMat++) // check first material name
{
if( matName1 == (*theMaterialTable)[iMat]->GetName() )
{
fMatIndex1 = (*theMaterialTable)[iMat]->GetIndex() ;
break ;
}
}
if(iMat == numOfMat)
{
G4Exception("Invalid first material name in G4ForwardXrayTR constructor") ;
}
for(iMat=0;iMat<numOfMat;iMat++) // check second material name
{
if( matName2 == (*theMaterialTable)[iMat]->GetName() )
{
fMatIndex2 = (*theMaterialTable)[iMat]->GetIndex() ;
break ;
}
}
if(iMat == numOfMat)
{
G4Exception("Invalid second material name in G4ForwardXrayTR constructor") ;
}
// G4cout<<"G4ForwardXray constructor is called"<<G4endl ;
BuildXrayTRtables() ;
}
/////////////////////////////////////////////////////////////////////////
//
// Constructor used by X-ray transition radiation parametrisation models
G4ForwardXrayTR::
G4ForwardXrayTR( const G4String& processName )
: G4TransitionRadiation(processName)
{
;
}
//////////////////////////////////////////////////////////////////////
//
// Destructor
//
G4ForwardXrayTR::~G4ForwardXrayTR()
{
;
}
//////////////////////////////////////////////////////////////////////////////
//
// Build physics tables for energy and angular distributions of X-ray TR photon
void G4ForwardXrayTR::BuildXrayTRtables()
{
G4int iMat, jMat, iTkin, iTR, iPlace ;
static
const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable() ;
G4int numOfMat = G4Material::GetNumberOfMaterials() ;
fGammaCutInKineticEnergy = new G4double[numOfMat] ;
fGammaCutInKineticEnergy = fPtrGamma->GetEnergyCuts() ;
fAngleDistrTable = new G4PhysicsTable(2*fTotBin) ;
fEnergyDistrTable = new G4PhysicsTable(2*fTotBin) ;
for(iMat=0;iMat<numOfMat;iMat++) // loop over pairs of different materials
{
if( iMat != fMatIndex1 && iMat != fMatIndex2 ) continue ;
for(jMat=0;jMat<numOfMat;jMat++) // transition iMat -> jMat !!!
{
if( iMat == jMat || ( jMat != fMatIndex1 && jMat != fMatIndex2 ) )
{
continue ;
}
else
{
const G4Material* mat1 = (*theMaterialTable)[iMat] ;
const G4Material* mat2 = (*theMaterialTable)[jMat] ;
fSigma1 = fPlasmaCof*(mat1->GetElectronDensity()) ;
fSigma2 = fPlasmaCof*(mat2->GetElectronDensity()) ;
// fGammaTkinCut = fGammaCutInKineticEnergy[jMat] ; // TR photon in jMat !
fGammaTkinCut = 0.0 ;
if(fGammaTkinCut > fTheMinEnergyTR) // setting of min/max TR energies
{
fMinEnergyTR = fGammaTkinCut ;
}
else
{
fMinEnergyTR = fTheMinEnergyTR ;
}
if(fGammaTkinCut > fTheMaxEnergyTR)
{
fMaxEnergyTR = 2.0*fGammaTkinCut ; // usually very low TR rate
}
else
{
fMaxEnergyTR = fTheMaxEnergyTR ;
}
for(iTkin=0;iTkin<fTotBin;iTkin++) // Lorentz factor loop
{
G4PhysicsLogVector*
energyVector = new G4PhysicsLogVector( fMinEnergyTR,
fMaxEnergyTR,
fBinTR ) ;
fGamma = 1.0 + (fProtonEnergyVector->
GetLowEdgeEnergy(iTkin)/proton_mass_c2) ;
fMaxThetaTR = 10000.0/(fGamma*fGamma) ;
if(fMaxThetaTR > fTheMaxAngle)
{
fMaxThetaTR = fTheMaxAngle ;
}
else
{
if(fMaxThetaTR < fTheMinAngle)
{
fMaxThetaTR = fTheMinAngle ;
}
}
// G4cout<<G4endl<<"fGamma = "<<fGamma<<" fMaxThetaTR = "<<fMaxThetaTR<<G4endl ;
G4PhysicsLinearVector*
angleVector = new G4PhysicsLinearVector( 0.0,
fMaxThetaTR,
fBinTR ) ;
G4double energySum = 0.0 ;
G4double angleSum = 0.0 ;
energyVector->PutValue(fBinTR-1,energySum) ;
angleVector->PutValue(fBinTR-1,angleSum) ;
for(iTR=fBinTR-2;iTR>=0;iTR--)
{
energySum += fCofTR*EnergySum(energyVector->GetLowEdgeEnergy(iTR),
energyVector->GetLowEdgeEnergy(iTR+1)) ;
angleSum += fCofTR*AngleSum(angleVector->GetLowEdgeEnergy(iTR),
angleVector->GetLowEdgeEnergy(iTR+1)) ;
energyVector->PutValue(iTR,energySum) ;
angleVector ->PutValue(iTR,angleSum) ;
}
// G4cout<<"sumE = "<<energySum<<" ; sumA = "<<angleSum<<G4endl ;
if(jMat < iMat)
{
iPlace = fTotBin+iTkin ; // (iMat*(numOfMat-1)+jMat)*
}
else // jMat > iMat right part of matrices (jMat-1) !
{
iPlace = iTkin ; // (iMat*(numOfMat-1)+jMat-1)*fTotBin+
}
fEnergyDistrTable->insertAt(iPlace,energyVector) ;
fAngleDistrTable->insertAt(iPlace,angleVector) ;
} // iTkin
} // jMat != iMat
} // jMat
} // iMat
// G4cout<<"G4ForwardXrayTR::BuildXrayTRtables have been called"<<G4endl ;
}
///////////////////////////////////////////////////////////////////////
//
// This function returns the spectral and angle density of TR quanta
// in X-ray energy region generated forward when a relativistic
// charged particle crosses interface between two materials.
// The high energy small theta approximation is applied.
// (matter1 -> matter2)
// varAngle =2* (1 - cos(Theta)) or approximately = Theta*Theta
//
G4double
G4ForwardXrayTR::SpectralAngleTRdensity( G4double energy,
G4double varAngle ) const
{
G4double formationLength1, formationLength2 ;
formationLength1 = 1.0/
(1.0/(fGamma*fGamma)
+ fSigma1/(energy*energy)
+ varAngle) ;
formationLength2 = 1.0/
(1.0/(fGamma*fGamma)
+ fSigma2/(energy*energy)
+ varAngle) ;
return (varAngle/energy)*(formationLength1 - formationLength2)
*(formationLength1 - formationLength2) ;
}
//////////////////////////////////////////////////////////////////
//
// Analytical formula for angular density of X-ray TR photons
//
G4double G4ForwardXrayTR::AngleDensity( G4double energy,
G4double varAngle ) const
{
G4double x, x2, a, b, c, d, f, a2, b2, a4, b4 ;
G4double cof1, cof2, cof3 ;
x = 1.0/energy ;
x2 = x*x ;
c = 1.0/fSigma1 ;
d = 1.0/fSigma2 ;
f = (varAngle + 1.0/(fGamma*fGamma)) ;
a2 = c*f ;
b2 = d*f ;
a4 = a2*a2 ;
b4 = b2*b2 ;
a = sqrt(a2) ;
b = sqrt(b2) ;
cof1 = c*c*(0.5/(a2*(x2 +a2)) +0.5*log(x2/(x2 +a2))/a4) ;
cof3 = d*d*(0.5/(b2*(x2 +b2)) +0.5*log(x2/(x2 +b2))/b4) ;
cof2 = -c*d*(log(x2/(x2 +b2))/b2 - log(x2/(x2 +a2))/a2)/(a2 - b2) ;
return -varAngle*(cof1 + cof2 + cof3) ;
}
/////////////////////////////////////////////////////////////////////
//
// Definite integral of X-ray TR spectral-angle density from energy1
// to energy2
//
G4double G4ForwardXrayTR::EnergyInterval( G4double energy1,
G4double energy2,
G4double varAngle ) const
{
return AngleDensity(energy2,varAngle)
- AngleDensity(energy1,varAngle) ;
}
//////////////////////////////////////////////////////////////////////
//
// Integral angle distribution of X-ray TR photons based on analytical
// formula for angle density
//
G4double G4ForwardXrayTR::AngleSum( G4double varAngle1,
G4double varAngle2 ) const
{
G4int i ;
G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
for(i=1;i<fSympsonNumber;i++)
{
sumEven += EnergyInterval(fMinEnergyTR,fMaxEnergyTR,varAngle1 + 2*i*h ) ;
sumOdd += EnergyInterval(fMinEnergyTR,fMaxEnergyTR,
varAngle1 + (2*i - 1)*h ) ;
}
sumOdd += EnergyInterval(fMinEnergyTR,fMaxEnergyTR,
varAngle1 + (2*fSympsonNumber - 1)*h ) ;
return h*(EnergyInterval(fMinEnergyTR,fMaxEnergyTR,varAngle1)
+ EnergyInterval(fMinEnergyTR,fMaxEnergyTR,varAngle2)
+ 4.0*sumOdd + 2.0*sumEven )/3.0 ;
}
/////////////////////////////////////////////////////////////////////
//
// Analytical Expression for spectral density of Xray TR photons
// x = 2*(1 - cos(Theta)) ~ Theta^2
//
G4double G4ForwardXrayTR::SpectralDensity( G4double energy,
G4double x ) const
{
G4double a, b ;
a = 1.0/(fGamma*fGamma)
+ fSigma1/(energy*energy) ;
b = 1.0/(fGamma*fGamma)
+ fSigma2/(energy*energy) ;
return ( (a + b)*log((x + b)/(x + a))/(a - b)
+ a/(x + a) + b/(x + b) )/energy ;
}
////////////////////////////////////////////////////////////////////
//
// The spectral density in some angle interval from varAngle1 to
// varAngle2
//
G4double G4ForwardXrayTR::AngleInterval( G4double energy,
G4double varAngle1,
G4double varAngle2 ) const
{
return SpectralDensity(energy,varAngle2)
- SpectralDensity(energy,varAngle1) ;
}
////////////////////////////////////////////////////////////////////
//
// Integral spectral distribution of X-ray TR photons based on
// analytical formula for spectral density
//
G4double G4ForwardXrayTR::EnergySum( G4double energy1,
G4double energy2 ) const
{
G4int i ;
G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
h = 0.5*(energy2 - energy1)/fSympsonNumber ;
for(i=1;i<fSympsonNumber;i++)
{
sumEven += AngleInterval(energy1 + 2*i*h,0.0,fMaxThetaTR);
sumOdd += AngleInterval(energy1 + (2*i - 1)*h,0.0,fMaxThetaTR) ;
}
sumOdd += AngleInterval(energy1 + (2*fSympsonNumber - 1)*h,
0.0,fMaxThetaTR) ;
return h*( AngleInterval(energy1,0.0,fMaxThetaTR)
+ AngleInterval(energy2,0.0,fMaxThetaTR)
+ 4.0*sumOdd + 2.0*sumEven )/3.0 ;
}
/////////////////////////////////////////////////////////////////////////
//
// PostStepDoIt function for creation of forward X-ray photons in TR process
// on boubndary between two materials with really different plasma energies
//
G4VParticleChange* G4ForwardXrayTR::PostStepDoIt(const G4Track& aTrack,
const G4Step& aStep)
{
aParticleChange.Initialize(aTrack);
// G4cout<<"call G4ForwardXrayTR::PostStepDoIt"<<G4endl ;
G4int iMat, jMat, iTkin, iPlace, numOfMat, numOfTR, iTR, iTransfer ;
G4double energyPos, anglePos, energyTR, theta, phi, dirX, dirY, dirZ ;
G4double W, W1, W2, E1, E2 ;
static
const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable() ;
numOfMat = G4Material::GetNumberOfMaterials() ;
G4StepPoint* pPreStepPoint = aStep.GetPreStepPoint();
G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint();
if (pPostStepPoint->GetStepStatus() != fGeomBoundary)
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
if (aTrack.GetStepLength() <= kCarTolerance*0.5)
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
// Come on boundary, so begin to try TR
iMat = pPreStepPoint ->GetPhysicalVolume()->
GetLogicalVolume()->GetMaterial()->GetIndex() ;
jMat = pPostStepPoint->GetPhysicalVolume()->
GetLogicalVolume()->GetMaterial()->GetIndex() ;
// The case of equal or approximate (in terms of plasma energy) materials
// No TR photons ?!
if ( iMat == jMat
|| ( (fMatIndex1 >= 0 && fMatIndex1 >= 0)
&& ( iMat != fMatIndex1 && iMat != fMatIndex2 )
&& ( jMat != fMatIndex1 && jMat != fMatIndex2 ) )
|| (*theMaterialTable)[iMat]->GetState() ==
(*theMaterialTable)[jMat]->GetState()
||( (*theMaterialTable)[iMat]->GetState() == kStateSolid
&& (*theMaterialTable)[jMat]->GetState() == kStateLiquid )
||( (*theMaterialTable)[iMat]->GetState() == kStateLiquid
&& (*theMaterialTable)[jMat]->GetState() == kStateSolid ) )
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep) ;
}
const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
G4double charge = aParticle->GetDefinition()->GetPDGCharge();
if(charge == 0.0) // Uncharged particle doesn't Generate TR photons
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
// Now we are ready to Generate TR photons
G4double chargeSq = charge*charge ;
G4double kinEnergy = aParticle->GetKineticEnergy() ;
G4double massRatio = proton_mass_c2/aParticle->GetDefinition()->GetPDGMass() ;
G4double TkinScaled = kinEnergy*massRatio ;
for(iTkin=0;iTkin<fTotBin;iTkin++)
{
if(TkinScaled < fProtonEnergyVector->GetLowEdgeEnergy(iTkin)) // <= ?
{
break ;
}
}
if(jMat < iMat)
{
iPlace = fTotBin + iTkin - 1 ; // (iMat*(numOfMat - 1) + jMat)*
}
else
{
iPlace = iTkin - 1 ; // (iMat*(numOfMat - 1) + jMat - 1)*fTotBin +
}
// G4PhysicsVector* energyVector1 = (*fEnergyDistrTable)(iPlace) ;
// G4PhysicsVector* energyVector2 = (*fEnergyDistrTable)(iPlace + 1) ;
// G4PhysicsVector* angleVector1 = (*fAngleDistrTable)(iPlace) ;
// G4PhysicsVector* angleVector2 = (*fAngleDistrTable)(iPlace + 1) ;
G4ParticleMomentum particleDir = aParticle->GetMomentumDirection() ;
if(iTkin == fTotBin) // TR plato, try from left
{
// G4cout<<iTkin<<" mean TR number = "<<( (*(*fEnergyDistrTable)(iPlace))(0) +
// (*(*fAngleDistrTable)(iPlace))(0) )
// *chargeSq*0.5<<G4endl ;
numOfTR = RandPoisson::shoot( ( (*(*fEnergyDistrTable)(iPlace))(0) +
(*(*fAngleDistrTable)(iPlace))(0) )
*chargeSq*0.5 ) ;
if(numOfTR == 0)
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
else
{
// G4cout<<"Number of X-ray TR photons = "<<numOfTR<<G4endl ;
aParticleChange.SetNumberOfSecondaries(numOfTR);
for(iTR=0;iTR<numOfTR;iTR++)
{
energyPos = (*(*fEnergyDistrTable)(iPlace))(0)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(energyPos >= (*(*fEnergyDistrTable)(iPlace))(iTransfer)) break ;
}
energyTR = (*fEnergyDistrTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ;
// G4cout<<"energyTR = "<<energyTR/keV<<"keV"<<G4endl ;
kinEnergy -= energyTR ;
aParticleChange.SetEnergyChange(kinEnergy);
anglePos = (*(*fAngleDistrTable)(iPlace))(0)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(anglePos > (*(*fAngleDistrTable)(iPlace))(iTransfer)) break ;
}
theta = sqrt((*fAngleDistrTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1)) ;
// G4cout<<iTransfer<<" : theta = "<<theta<<G4endl ;
phi = twopi*G4UniformRand() ;
dirX = sin(theta)*cos(phi) ;
dirY = sin(theta)*sin(phi) ;
dirZ = cos(theta) ;
G4ThreeVector directionTR(dirX,dirY,dirZ) ;
directionTR.rotateUz(particleDir) ;
G4DynamicParticle* aPhotonTR = new G4DynamicParticle(G4Gamma::Gamma(),
directionTR,
energyTR ) ;
aParticleChange.AddSecondary(aPhotonTR) ;
}
}
}
else
{
if(iTkin == 0) // Tkin is too small, neglect of TR photon generation
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
else // general case: Tkin between two vectors of the material
{
E1 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin - 1) ;
E2 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin) ;
W = 1.0/(E2 - E1) ;
W1 = (E2 - TkinScaled)*W ;
W2 = (TkinScaled - E1)*W ;
// G4cout<<iTkin<<" mean TR number = "<<(((*(*fEnergyDistrTable)(iPlace))(0)+
// (*(*fAngleDistrTable)(iPlace))(0))*W1 +
// ((*(*fEnergyDistrTable)(iPlace + 1))(0)+
// (*(*fAngleDistrTable)(iPlace + 1))(0))*W2)
// *chargeSq*0.5<<G4endl ;
numOfTR = RandPoisson::shoot((((*(*fEnergyDistrTable)(iPlace))(0)+
(*(*fAngleDistrTable)(iPlace))(0))*W1 +
((*(*fEnergyDistrTable)(iPlace + 1))(0)+
(*(*fAngleDistrTable)(iPlace + 1))(0))*W2)
*chargeSq*0.5 ) ;
if(numOfTR == 0)
{
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
else
{
// G4cout<<"Number of X-ray TR photons = "<<numOfTR<<G4endl ;
aParticleChange.SetNumberOfSecondaries(numOfTR);
for(iTR=0;iTR<numOfTR;iTR++)
{
energyPos = ((*(*fEnergyDistrTable)(iPlace))(0)*W1+
(*(*fEnergyDistrTable)(iPlace + 1))(0)*W2)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(energyPos >= ((*(*fEnergyDistrTable)(iPlace))(iTransfer)*W1+
(*(*fEnergyDistrTable)(iPlace + 1))(iTransfer)*W2)) break ;
}
energyTR = ((*fEnergyDistrTable)(iPlace)->GetLowEdgeEnergy(iTransfer))*W1+
((*fEnergyDistrTable)(iPlace + 1)->GetLowEdgeEnergy(iTransfer))*W2 ;
// G4cout<<"energyTR = "<<energyTR/keV<<"keV"<<G4endl ;
kinEnergy -= energyTR ;
aParticleChange.SetEnergyChange(kinEnergy);
anglePos = ((*(*fAngleDistrTable)(iPlace))(0)*W1+
(*(*fAngleDistrTable)(iPlace + 1))(0)*W2)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(anglePos > ((*(*fAngleDistrTable)(iPlace))(iTransfer)*W1+
(*(*fAngleDistrTable)(iPlace + 1))(iTransfer)*W2)) break ;
}
theta = sqrt(((*fAngleDistrTable)(iPlace)->
GetLowEdgeEnergy(iTransfer-1))*W1+
((*fAngleDistrTable)(iPlace + 1)->
GetLowEdgeEnergy(iTransfer-1))*W2) ;
// G4cout<<iTransfer<<" : theta = "<<theta<<G4endl ;
phi = twopi*G4UniformRand() ;
dirX = sin(theta)*cos(phi) ;
dirY = sin(theta)*sin(phi) ;
dirZ = cos(theta) ;
G4ThreeVector directionTR(dirX,dirY,dirZ) ;
directionTR.rotateUz(particleDir) ;
G4DynamicParticle* aPhotonTR = new G4DynamicParticle(G4Gamma::Gamma(),
directionTR,
energyTR ) ;
aParticleChange.AddSecondary(aPhotonTR) ;
}
}
}
}
return &aParticleChange ;
}
////////////////////////////////////////////////////////////////////////////
//
// Test function for checking of PostStepDoIt random preparation of TR photon
// energy
//
G4double
G4ForwardXrayTR::GetEnergyTR(G4int iMat, G4int jMat, G4int iTkin) const
{
G4int iPlace, numOfMat, numOfTR, iTR, iTransfer ;
G4double energyTR = 0.0 ; // return this value for no TR photons
G4double energyPos ;
G4double W1, W2;
static
const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable() ;
numOfMat = G4Material::GetNumberOfMaterials() ;
// The case of equal or approximate (in terms of plasma energy) materials
// No TR photons ?!
if ( iMat == jMat
|| (*theMaterialTable)[iMat]->GetState() ==
(*theMaterialTable)[jMat]->GetState()
||( (*theMaterialTable)[iMat]->GetState() == kStateSolid
&& (*theMaterialTable)[jMat]->GetState() == kStateLiquid )
||( (*theMaterialTable)[iMat]->GetState() == kStateLiquid
&& (*theMaterialTable)[jMat]->GetState() == kStateSolid ) )
{
return energyTR ;
}
if(jMat < iMat)
{
iPlace = (iMat*(numOfMat - 1) + jMat)*fTotBin + iTkin - 1 ;
}
else
{
iPlace = (iMat*(numOfMat - 1) + jMat - 1)*fTotBin + iTkin - 1 ;
}
G4PhysicsVector* energyVector1 = (*fEnergyDistrTable)(iPlace) ;
G4PhysicsVector* energyVector2 = (*fEnergyDistrTable)(iPlace + 1) ;
if(iTkin == fTotBin) // TR plato, try from left
{
numOfTR = RandPoisson::shoot( (*energyVector1)(0) ) ;
if(numOfTR == 0)
{
return energyTR ;
}
else
{
for(iTR=0;iTR<numOfTR;iTR++)
{
energyPos = (*energyVector1)(0)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(energyPos >= (*energyVector1)(iTransfer)) break ;
}
energyTR += energyVector1->GetLowEdgeEnergy(iTransfer) ;
}
}
}
else
{
if(iTkin == 0) // Tkin is too small, neglect of TR photon generation
{
return energyTR ;
}
else // general case: Tkin between two vectors of the material
{ // use trivial mean half/half
W1 = 0.5 ;
W2 = 0.5 ;
numOfTR = RandPoisson::shoot( (*energyVector1)(0)*W1 +
(*energyVector2)(0)*W2 ) ;
if(numOfTR == 0)
{
return energyTR ;
}
else
{
G4cout<<"It is still OK in GetEnergyTR(int,int,int)"<<G4endl;
for(iTR=0;iTR<numOfTR;iTR++)
{
energyPos = ((*energyVector1)(0)*W1+
(*energyVector2)(0)*W2)*G4UniformRand() ;
for(iTransfer=0;iTransfer<fBinTR-1;iTransfer++)
{
if(energyPos >= ((*energyVector1)(iTransfer)*W1+
(*energyVector2)(iTransfer)*W2)) break ;
}
energyTR += (energyVector1->GetLowEdgeEnergy(iTransfer))*W1+
(energyVector2->GetLowEdgeEnergy(iTransfer))*W2 ;
}
}
}
}
return energyTR ;
}
////////////////////////////////////////////////////////////////////////////
//
// Test function for checking of PostStepDoIt random preparation of TR photon
// theta angle relative to particle direction
//
G4double
G4ForwardXrayTR::GetThetaTR(G4int iMat, G4int jMat, G4int iTkin) const
{
G4double theta = 0.0 ;
return theta ;
}
// end of G4ForwardXrayTR implementation file
//
///////////////////////////////////////////////////////////////////////////
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