Gabriele Cosmo
373 lines
11 KiB
C++
373 lines
11 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: G4VMscModel.hh 93264 2015-10-14 09:30:04Z gcosmo $
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4VMscModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 07.03.2008
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//
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// Modifications:
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// 07.04.2009 V.Ivanchenko moved msc methods from G4VEmModel to G4VMscModel
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// 26.03.2012 V.Ivanchenko added transport x-section pointer and Get?Set methods
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//
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// Class Description:
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//
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// General interface to msc models
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// -------------------------------------------------------------------
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//
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#ifndef G4VMscModel_h
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#define G4VMscModel_h 1
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#include <CLHEP/Units/SystemOfUnits.h>
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#include "G4VEmModel.hh"
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#include "G4MscStepLimitType.hh"
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#include "globals.hh"
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#include "G4ThreeVector.hh"
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#include "G4Track.hh"
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#include "G4SafetyHelper.hh"
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#include "G4VEnergyLossProcess.hh"
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#include "G4LossTableManager.hh"
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#include "G4PhysicsTable.hh"
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#include "G4ThreeVector.hh"
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#include <vector>
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class G4ParticleChangeForMSC;
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class G4VMscModel : public G4VEmModel
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{
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public:
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G4VMscModel(const G4String& nam);
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virtual ~G4VMscModel();
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virtual G4double ComputeTruePathLengthLimit(const G4Track& track,
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G4double& stepLimit);
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virtual G4double ComputeGeomPathLength(G4double truePathLength);
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virtual G4double ComputeTrueStepLength(G4double geomPathLength);
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virtual G4ThreeVector& SampleScattering(const G4ThreeVector&,
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G4double safety);
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// empty method
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virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double tmin,
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G4double tmax);
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//================================================================
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// Set parameters of multiple scattering models
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//================================================================
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inline void SetStepLimitType(G4MscStepLimitType);
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inline void SetLateralDisplasmentFlag(G4bool val);
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inline void SetRangeFactor(G4double);
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inline void SetGeomFactor(G4double);
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inline void SetSkin(G4double);
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inline void SetSampleZ(G4bool);
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//================================================================
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// Get/Set access to Physics Tables
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//================================================================
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inline G4VEnergyLossProcess* GetIonisation() const;
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inline void SetIonisation(G4VEnergyLossProcess*,
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const G4ParticleDefinition* part);
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//================================================================
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// Run time methods
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//================================================================
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protected:
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// initialisation of the ParticleChange for the model
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// initialisation of interface with geometry and ionisation
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G4ParticleChangeForMSC*
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GetParticleChangeForMSC(const G4ParticleDefinition* p = 0);
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// convert true length to geometry length
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inline G4double ConvertTrueToGeom(G4double& tLength, G4double& gLength);
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public:
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// compute safety
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inline G4double ComputeSafety(const G4ThreeVector& position,
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G4double limit= DBL_MAX);
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// compute linear distance to a geometry boundary
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inline G4double ComputeGeomLimit(const G4Track&, G4double& presafety,
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G4double limit);
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inline G4double GetDEDX(const G4ParticleDefinition* part,
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G4double kineticEnergy,
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const G4MaterialCutsCouple* couple);
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inline G4double GetRange(const G4ParticleDefinition* part,
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G4double kineticEnergy,
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const G4MaterialCutsCouple* couple);
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inline G4double GetEnergy(const G4ParticleDefinition* part,
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G4double range,
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const G4MaterialCutsCouple* couple);
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// G4MaterialCutsCouple should be defined before call to this method
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inline
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G4double GetTransportMeanFreePath(const G4ParticleDefinition* part,
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G4double kinEnergy);
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private:
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// hide assignment operator
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G4VMscModel & operator=(const G4VMscModel &right);
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G4VMscModel(const G4VMscModel&);
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G4SafetyHelper* safetyHelper;
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G4VEnergyLossProcess* ionisation;
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const G4ParticleDefinition* currentPart;
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G4LossTableManager* man;
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G4double dedx;
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G4double localtkin;
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G4double localrange;
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protected:
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G4double facrange;
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G4double facgeom;
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G4double facsafety;
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G4double skin;
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G4double dtrl;
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G4double lambdalimit;
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G4double geomMin;
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G4double geomMax;
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G4ThreeVector fDisplacement;
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G4MscStepLimitType steppingAlgorithm;
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G4bool samplez;
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G4bool latDisplasment;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetLateralDisplasmentFlag(G4bool val)
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{
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if(!IsLocked()) { latDisplasment = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetSkin(G4double val)
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{
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if(!IsLocked()) { skin = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetRangeFactor(G4double val)
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{
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if(!IsLocked()) { facrange = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetGeomFactor(G4double val)
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{
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if(!IsLocked()) { facgeom = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetStepLimitType(G4MscStepLimitType val)
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{
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if(!IsLocked()) { steppingAlgorithm = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetSampleZ(G4bool val)
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{
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if(!IsLocked()) { samplez = val; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4VMscModel::ComputeSafety(const G4ThreeVector& position,
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G4double limit)
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{
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return safetyHelper->ComputeSafety(position, limit);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4VMscModel::ConvertTrueToGeom(G4double& tlength,
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G4double& glength)
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{
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glength = ComputeGeomPathLength(tlength);
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// should return true length
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return tlength;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4VMscModel::ComputeGeomLimit(const G4Track& track,
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G4double& presafety,
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G4double limit)
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{
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/*
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G4double res = geomMax;
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if(track.GetVolume() != safetyHelper->GetWorldVolume()) {
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G4double res = safetyHelper->CheckNextStep(
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track.GetStep()->GetPreStepPoint()->GetPosition(),
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track.GetMomentumDirection(),
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limit, presafety);
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}
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return res;
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*/
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return safetyHelper->CheckNextStep(
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track.GetStep()->GetPreStepPoint()->GetPosition(),
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track.GetMomentumDirection(),
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limit, presafety);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double
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G4VMscModel::GetDEDX(const G4ParticleDefinition* part,
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G4double kinEnergy, const G4MaterialCutsCouple* couple)
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{
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G4double x;
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if(ionisation) { x = ionisation->GetDEDX(kinEnergy, couple); }
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else {
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G4double q = part->GetPDGCharge()*inveplus;
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x = dedx*q*q;
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}
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double
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G4VMscModel::GetRange(const G4ParticleDefinition* part,
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G4double kinEnergy, const G4MaterialCutsCouple* couple)
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{
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//G4cout << "G4VMscModel::GetRange E(MeV)= " << kinEnergy << " "
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// << ionisation << " " << part->GetParticleName()
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// << G4endl;
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localtkin = kinEnergy;
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if(ionisation) {
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localrange = ionisation->GetRangeForLoss(kinEnergy, couple);
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} else {
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G4double q = part->GetPDGCharge()*inveplus;
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localrange = kinEnergy/(dedx*q*q*couple->GetMaterial()->GetDensity());
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}
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//G4cout << "R(mm)= " << localrange << " " << ionisation << G4endl;
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return localrange;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double
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G4VMscModel::GetEnergy(const G4ParticleDefinition* part,
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G4double range, const G4MaterialCutsCouple* couple)
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{
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G4double e;
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//G4cout << "G4VMscModel::GetEnergy R(mm)= " << range << " " << ionisation
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// << " Rlocal(mm)= " << localrange << " Elocal(MeV)= " << localtkin
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// << G4endl;
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if(ionisation) { e = ionisation->GetKineticEnergy(range, couple); }
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else {
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e = localtkin;
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if(localrange > range) {
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G4double q = part->GetPDGCharge()*inveplus;
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e -= (localrange - range)*dedx*q*q*couple->GetMaterial()->GetDensity();
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}
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}
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return e;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4VEnergyLossProcess* G4VMscModel::GetIonisation() const
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{
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return ionisation;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4VMscModel::SetIonisation(G4VEnergyLossProcess* p,
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const G4ParticleDefinition* part)
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{
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ionisation = p;
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currentPart = part;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double
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G4VMscModel::GetTransportMeanFreePath(const G4ParticleDefinition* part,
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G4double ekin)
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{
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G4double x;
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if(xSectionTable) {
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G4int idx = CurrentCouple()->GetIndex();
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x = (*xSectionTable)[(*theDensityIdx)[idx]]->Value(ekin, idxTable)
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*(*theDensityFactor)[idx]/(ekin*ekin);
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} else {
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x = CrossSectionPerVolume(CurrentCouple()->GetMaterial(), part, ekin,
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0.0, DBL_MAX);
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}
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if(0.0 >= x) { x = DBL_MAX; }
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else { x = 1.0/x; }
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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