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geant4/source/processes/electromagnetic/muons/include/G4EnergyLossForExtrapolator.hh
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Gabriele Cosmo db49709b53 Import Geant4 10.5.0 source tree
2018-12-07 15:15:39 +01:00

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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. *
// ********************************************************************
//
//
//---------------------------------------------------------------------------
//
// ClassName: G4EnergyLossForExtrapolator
//
// Description: This class provide calculation of energy loss, fluctuation,
// and msc angle
//
// Author: 09.12.04 V.Ivanchenko
//
// Modification:
// 08-04-05 Rename Propogator -> Extrapolator
// 16-03-06 Add muon tables
// 21-03-06 Add verbosity defined in the constructor and Initialisation
// start only when first public method is called (V.Ivanchenko)
// 03-05-06 Remove unused pointer G4Material* from number of methods (VI)
// 28-07-07 Add maxEnergyTransfer for computation of energy loss (VI)
//
//----------------------------------------------------------------------------
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#ifndef G4EnergyLossForExtrapolator_h
#define G4EnergyLossForExtrapolator_h 1
#include <vector>
#include <CLHEP/Units/PhysicalConstants.h>
#include "globals.hh"
#include "G4PhysicsTable.hh"
#include "G4TablesForExtrapolator.hh"
#include "G4Log.hh"
#include "G4Threading.hh"
class G4ParticleDefinition;
class G4Material;
class G4MaterialCutsCouple;
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
class G4EnergyLossForExtrapolator
{
public:
explicit G4EnergyLossForExtrapolator(G4int verb = 1);
~G4EnergyLossForExtrapolator();
G4double ComputeDEDX(G4double kinEnergy, const G4ParticleDefinition*);
G4double ComputeRange(G4double kinEnergy, const G4ParticleDefinition*);
G4double ComputeEnergy(G4double range, const G4ParticleDefinition*);
G4double EnergyAfterStep(G4double kinEnergy, G4double step,
const G4Material*, const G4ParticleDefinition*);
G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
const G4Material*, const G4ParticleDefinition*);
G4double TrueStepLength(G4double kinEnergy, G4double step,
const G4Material*, const G4ParticleDefinition* part);
inline G4double EnergyAfterStep(G4double kinEnergy, G4double step,
const G4Material*,
const G4String& particleName);
inline G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
const G4Material*,
const G4String& particleName);
inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
const G4Material*,
const G4ParticleDefinition* part);
inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
const G4Material*,
const G4String& particleName);
inline G4double ComputeTrueStep(const G4Material*,
const G4ParticleDefinition* part,
G4double kinEnergy, G4double stepLength);
inline G4double EnergyDispersion(G4double kinEnergy, G4double step,
const G4Material*,
const G4ParticleDefinition*);
inline G4double EnergyDispersion(G4double kinEnergy, G4double step,
const G4Material*,
const G4String& particleName);
inline void SetVerbose(G4int val);
inline void SetMinKinEnergy(G4double);
inline void SetMaxKinEnergy(G4double);
inline void SetMaxEnergyTransfer(G4double);
private:
void Initialisation();
void BuildTables();
G4bool SetupKinematics(const G4ParticleDefinition*, const G4Material*,
G4double kinEnergy);
const G4ParticleDefinition* FindParticle(const G4String& name);
inline G4double ComputeValue(G4double x, const G4PhysicsTable* table,
size_t idx);
inline const G4PhysicsTable* GetPhysicsTable(ExtTableType type) const;
// hide assignment operator
G4EnergyLossForExtrapolator & operator=(const G4EnergyLossForExtrapolator &right);
G4EnergyLossForExtrapolator(const G4EnergyLossForExtrapolator&);
#ifdef G4MULTITHREADED
static G4Mutex extrapolatorMutex;
#endif
static G4TablesForExtrapolator* tables;
const G4ParticleDefinition* currentParticle;
const G4ParticleDefinition* electron;
const G4ParticleDefinition* positron;
const G4ParticleDefinition* muonPlus;
const G4ParticleDefinition* muonMinus;
const G4ParticleDefinition* proton;
G4String currentParticleName;
size_t idxDedxElectron;
size_t idxDedxPositron;
size_t idxDedxMuon;
size_t idxDedxProton;
size_t idxRangeElectron;
size_t idxRangePositron;
size_t idxRangeMuon;
size_t idxRangeProton;
size_t idxInvRangeElectron;
size_t idxInvRangePositron;
size_t idxInvRangeMuon;
size_t idxInvRangeProton;
size_t idxMscElectron;
const G4Material* currentMaterial;
G4int index;
G4double electronDensity;
G4double radLength;
G4double mass;
G4double charge2;
G4double kineticEnergy;
G4double gam;
G4double bg2;
G4double beta2;
G4double tmax;
G4double linLossLimit;
G4double emin;
G4double emax;
G4double maxEnergyTransfer;
G4int nbins;
G4int nmat;
G4int verbose;
};
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline const G4PhysicsTable*
G4EnergyLossForExtrapolator::GetPhysicsTable(ExtTableType type) const
{
return tables->GetPhysicsTable(type);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::EnergyAfterStep(G4double kinEnergy,
G4double step,
const G4Material* mat,
const G4String& name)
{
return EnergyAfterStep(kinEnergy,step,mat,FindParticle(name));
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::EnergyBeforeStep(G4double kinEnergy,
G4double step,
const G4Material* mat,
const G4String& name)
{
return EnergyBeforeStep(kinEnergy,step,mat,FindParticle(name));
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy,
G4double step,
const G4Material* mat,
const G4String& name)
{
return AverageScatteringAngle(kinEnergy,step,mat,FindParticle(name));
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy,
G4double step,
const G4Material* mat,
const G4String& name)
{
return EnergyDispersion(kinEnergy,step,mat,FindParticle(name));
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double G4EnergyLossForExtrapolator::AverageScatteringAngle(
G4double kinEnergy,
G4double stepLength,
const G4Material* mat,
const G4ParticleDefinition* part)
{
G4double theta = 0.0;
if(SetupKinematics(part, mat, kinEnergy)) {
G4double t = stepLength/radLength;
G4double y = std::max(0.001, t);
theta = 19.23*CLHEP::MeV*std::sqrt(charge2*t)*(1.0 + 0.038*G4Log(y))
/(beta2*gam*mass);
}
return theta;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::ComputeTrueStep(const G4Material* mat,
const G4ParticleDefinition* part,
G4double kinEnergy,
G4double stepLength)
{
G4double theta = AverageScatteringAngle(kinEnergy,stepLength,mat,part);
return stepLength*std::sqrt(1.0 + 0.625*theta*theta);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy,
G4double stepLength,
const G4Material* mat,
const G4ParticleDefinition* part)
{
G4double sig2 = 0.0;
if(SetupKinematics(part, mat, kinEnergy)) {
G4double step = ComputeTrueStep(mat,part,kinEnergy,stepLength);
sig2 = (1.0/beta2 - 0.5)
*CLHEP::twopi_mc2_rcl2*tmax*step*electronDensity*charge2;
}
return sig2;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double
G4EnergyLossForExtrapolator::ComputeValue(G4double x,
const G4PhysicsTable* table,
size_t idx)
{
G4double res = 0.0;
if(table) { res = ((*table)[index])->Value(x, idx); }
return res;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4EnergyLossForExtrapolator::SetVerbose(G4int val)
{
verbose = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4EnergyLossForExtrapolator::SetMinKinEnergy(G4double val)
{
emin = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4EnergyLossForExtrapolator::SetMaxKinEnergy(G4double val)
{
emax = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4EnergyLossForExtrapolator::SetMaxEnergyTransfer(G4double val)
{
maxEnergyTransfer = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#endif
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