include/Geant4/G4ContinuousGainOfEnergy.hh

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0025 //
0026 ////////////////////////////////////////////////////////////////////////////////
0027 //  Class:    G4ContinuousGainOfEnergy
0028 //  Author:         L. Desorgher
0029 //  Organisation:   SpaceIT GmbH
0030 //
0031 //  Continuous process acting on adjoint particles to compute the continuous
0032 //  gain of energy of charged particles when they are tracked back.
0033 ////////////////////////////////////////////////////////////////////////////////
0034
0035 #ifndef G4ContinuousGainOfEnergy_h
0036 #define G4ContinuousGainOfEnergy_h 1
0037
0038 #include "globals.hh"
0039 #include "G4ProductionCutsTable.hh"
0040 #include "G4VContinuousProcess.hh"
0041
0042 class G4Material;
0043 class G4MaterialCutsCouple;
0044 class G4ParticleChange;
0045 class G4ParticleDefinition;
0046 class G4Step;
0047 class G4Track;
0048 class G4VEmModel;
0049 class G4VEnergyLossProcess;
0050
0051 class G4ContinuousGainOfEnergy : public G4VContinuousProcess
0052 {
0053  public:
0054   explicit G4ContinuousGainOfEnergy(const G4String& name = "EnergyGain",
0055                                     G4ProcessType type   = fElectromagnetic);
0056
0057   ~G4ContinuousGainOfEnergy() override;
0058
0059   G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&) override;
0060
0061   void SetLossFluctuations(G4bool val);
0062
0063   inline void SetDirectEnergyLossProcess(G4VEnergyLossProcess* aProcess)
0064   {
0065     fDirectEnergyLossProcess = aProcess;
0066   };
0067
0068   void SetDirectParticle(G4ParticleDefinition* p);
0069
0070   void ProcessDescription(std::ostream&) const override;
0071   void DumpInfo() const override { ProcessDescription(G4cout); };
0072
0073   G4ContinuousGainOfEnergy(G4ContinuousGainOfEnergy&) = delete;
0074   G4ContinuousGainOfEnergy& operator=(const G4ContinuousGainOfEnergy& right) =
0075     delete;
0076
0077  protected:
0078   G4double GetContinuousStepLimit(const G4Track& track,
0079                                   G4double previousStepSize,
0080                                   G4double currentMinimumStep,
0081                                   G4double& currentSafety) override;
0082
0083  private:
0084   void DefineMaterial(const G4MaterialCutsCouple* couple);
0085   void SetDynamicMassCharge(const G4Track& track, G4double energy);
0086
0087   const G4Material* fCurrentMaterial = nullptr;
0088   const G4MaterialCutsCouple* fCurrentCouple = nullptr;
0089
0090   G4VEmModel* fCurrentModel                      = nullptr;
0091   G4VEnergyLossProcess* fDirectEnergyLossProcess = nullptr;
0092   G4ParticleDefinition* fDirectPartDef           = nullptr;
0093
0094   G4double fCurrentTcut      = 0.;
0095   G4double fPreStepKinEnergy = 1.;
0096   G4double fLinLossLimit     = 0.05;
0097   G4double fMassRatio        = 1.;
0098
0099   size_t fCurrentCoupleIndex = 9999999;
0100
0101   G4bool fIsIon                      = false;
0102   G4bool fLossFluctuationFlag        = true;
0103   G4bool fLossFluctuationArePossible = true;
0104 };
0105
0106 ///////////////////////////////////////////////////////
0107 inline void G4ContinuousGainOfEnergy::DefineMaterial(
0108   const G4MaterialCutsCouple* couple)
0109 {
0110   if(couple != fCurrentCouple)
0111   {
0112     fCurrentCouple      = couple;
0113     fCurrentMaterial    = couple->GetMaterial();
0114     fCurrentCoupleIndex = couple->GetIndex();
0115
0116     const std::vector<G4double>* aVec =
0117       G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(1);
0118     fCurrentTcut = (*aVec)[fCurrentCoupleIndex];
0119   }
0120 }
0121
0122 #endif