Gabriele Cosmo
308 lines
10 KiB
C++
308 lines
10 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// $Id: G4EnergyLossForExtrapolator.hh,v 1.9 2007/07/28 13:44:25 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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//---------------------------------------------------------------------------
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//
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// ClassName: G4EnergyLossForExtrapolator
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//
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// Description: This class provide calculation of energy loss, fluctuation,
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// and msc angle
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//
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// Author: 09.12.04 V.Ivanchenko
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//
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// Modification:
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// 08-04-05 Rename Propogator -> Extrapolator
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// 16-03-06 Add muon tables
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// 21-03-06 Add verbosity defined in the constructor and Initialisation
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// start only when first public method is called (V.Ivanchenko)
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// 03-05-06 Remove unused pointer G4Material* from number of methods (VI)
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// 28-07-07 Add maxEnergyTransfer for computation of energy loss (VI)
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//
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//----------------------------------------------------------------------------
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#ifndef G4EnergyLossForExtrapolator_h
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#define G4EnergyLossForExtrapolator_h 1
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#include "globals.hh"
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#include "G4PhysicsTable.hh"
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#include <vector>
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class G4ParticleDefinition;
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class G4Material;
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class G4MaterialCutsCouple;
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class G4ProductionCuts;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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class G4EnergyLossForExtrapolator
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{
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public:
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G4EnergyLossForExtrapolator(G4int verb = 1);
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~G4EnergyLossForExtrapolator();
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G4double ComputeDEDX(G4double kinEnergy, const G4ParticleDefinition*);
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G4double ComputeRange(G4double kinEnergy, const G4ParticleDefinition*);
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G4double ComputeEnergy(G4double range, const G4ParticleDefinition*);
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G4double EnergyAfterStep(G4double kinEnergy, G4double step,
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const G4Material*, const G4ParticleDefinition*);
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G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
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const G4Material*, const G4ParticleDefinition*);
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inline G4double EnergyAfterStep(G4double kinEnergy, G4double step,
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const G4Material*, const G4String& particleName);
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inline G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
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const G4Material*, const G4String& particleName);
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inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
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const G4Material*, const G4ParticleDefinition* part);
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inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
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const G4Material*, const G4String& particleName);
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inline G4double EnergyDispersion(G4double kinEnergy, G4double step,
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const G4Material*, const G4ParticleDefinition*);
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inline G4double EnergyDispersion(G4double kinEnergy, G4double step,
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const G4Material*, const G4String& particleName);
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inline void SetVerbose(G4int val);
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inline void SetMinKinEnergy(G4double);
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inline void SetMaxKinEnergy(G4double);
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inline void SetMaxEnergyTransfer(G4double);
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private:
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void Initialisation();
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G4PhysicsTable* PrepareTable();
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const G4ParticleDefinition* FindParticle(const G4String& name);
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void ComputeElectronDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table);
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void ComputeMuonDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table);
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void ComputeProtonDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table);
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G4double ComputeTrueStep(const G4Material*, const G4ParticleDefinition* part,
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G4double kinEnergy, G4double stepLength);
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inline G4double ComputeValue(G4double x, const G4PhysicsTable* table);
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inline G4double ComputeScatteringAngle(G4double x);
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// hide assignment operator
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G4EnergyLossForExtrapolator & operator=(const G4EnergyLossForExtrapolator &right);
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G4EnergyLossForExtrapolator(const G4EnergyLossForExtrapolator&);
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const G4ParticleDefinition* currentParticle;
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const G4ParticleDefinition* electron;
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const G4ParticleDefinition* positron;
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const G4ParticleDefinition* muonPlus;
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const G4ParticleDefinition* muonMinus;
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const G4ParticleDefinition* proton;
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G4ProductionCuts* cuts;
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std::vector<const G4MaterialCutsCouple*> couples;
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G4String currentParticleName;
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G4PhysicsTable* dedxElectron;
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G4PhysicsTable* dedxPositron;
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G4PhysicsTable* dedxMuon;
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G4PhysicsTable* dedxProton;
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G4PhysicsTable* rangeElectron;
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G4PhysicsTable* rangePositron;
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G4PhysicsTable* rangeMuon;
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G4PhysicsTable* rangeProton;
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G4PhysicsTable* invRangeElectron;
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G4PhysicsTable* invRangePositron;
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G4PhysicsTable* invRangeMuon;
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G4PhysicsTable* invRangeProton;
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const G4Material* currentMaterial;
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G4int index;
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G4double electronDensity;
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G4double radLength;
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G4double mass;
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G4double charge2;
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G4double kineticEnergy;
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G4double gam;
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G4double bg2;
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G4double beta2;
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G4double tmax;
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G4double linLossLimit;
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G4double emin;
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G4double emax;
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G4double maxEnergyTransfer;
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G4int nbins;
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G4int nmat;
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G4int verbose;
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G4bool isInitialised;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::EnergyAfterStep(G4double kinEnergy,
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G4double step,
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const G4Material* mat,
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const G4String& name)
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{
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return EnergyAfterStep(kinEnergy,step,mat,FindParticle(name));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::EnergyBeforeStep(G4double kinEnergy,
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G4double step,
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const G4Material* mat,
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const G4String& name)
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{
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return EnergyBeforeStep(kinEnergy,step,mat,FindParticle(name));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy,
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G4double step,
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const G4Material* mat,
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const G4String& name)
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{
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return AverageScatteringAngle(kinEnergy,step,mat,FindParticle(name));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy,
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G4double step,
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const G4Material* mat,
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const G4String& name)
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{
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return EnergyDispersion(kinEnergy,step,mat,FindParticle(name));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy,
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G4double stepLength,
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const G4Material* mat,
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const G4ParticleDefinition* part)
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{
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if(!isInitialised) Initialisation();
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G4double theta = 0.0;
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if(mat && part && kinEnergy > 0.0) {
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G4double step = ComputeTrueStep(mat,part,kinEnergy,stepLength);
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if(step > 0.001*radLength) theta = ComputeScatteringAngle(stepLength);
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}
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return theta;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::ComputeScatteringAngle(G4double x)
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{
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G4double t = x/radLength;
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return 19.23*MeV*std::sqrt(charge2*t)*(1.0 + 0.038*std::log(t))/(beta2*gam*mass);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::EnergyDispersion(
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G4double kinEnergy,
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G4double stepLength,
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const G4Material* mat,
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const G4ParticleDefinition* part)
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{
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if(!isInitialised) Initialisation();
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G4double sig2 = 0.0;
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if(mat && part ) {
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G4double step = ComputeTrueStep(mat,part,kinEnergy,stepLength);
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sig2 = (1.0/beta2 - 0.5)* twopi_mc2_rcl2 * tmax*step * electronDensity * charge2;
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}
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return sig2;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4EnergyLossForExtrapolator::ComputeValue(G4double x,
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const G4PhysicsTable* table)
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{
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G4double res = 0.0;
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bool b;
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res = ((*table)[index])->GetValue(x, b);
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return res;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4EnergyLossForExtrapolator::SetVerbose(G4int val)
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{
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verbose = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4EnergyLossForExtrapolator::SetMinKinEnergy(G4double val)
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{
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emin = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4EnergyLossForExtrapolator::SetMaxKinEnergy(G4double val)
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{
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emax = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4EnergyLossForExtrapolator::SetMaxEnergyTransfer(G4double val)
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{
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maxEnergyTransfer = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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