include/Geant4/G4AdjointBremsstrahlungModel.hh

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0025 //
0026 ////////////////////////////////////////////////////////////////////////////////
0027 //  Class:    G4AdjointBremsstrahlungModel
0028 //  Author:         L. Desorgher
0029 //  Organisation:   SpaceIT GmbH
0030 ////////////////////////////////////////////////////////////////////////////////
0031 //
0032 //  Adjoint Model for e- Bremsstrahlung.Adapted from G4eBremsstrahlungModel
0033 //  Use of a simple biased differential cross section (C(Z)/Egamma) allowing a
0034 //  rapid computation of adjoint CS and rapid sampling of adjoint secondaries.
0035 //  In this way cross section matrices are not used anymore, avoiding a long
0036 //  computation of adjoint brem cross section matrices for each material
0037 //  at initialisation. This mode can be switched on/off by selecting
0038 //  SetUseMatrix(false)/ SetUseMatrix(true) in the constructor.
0039 //
0040 //-------------------------------------------------------------
0041
0042 #ifndef G4AdjointBremsstrahlungModel_h
0043 #define G4AdjointBremsstrahlungModel_h 1
0044
0045 #include "globals.hh"
0046 #include "G4VEmAdjointModel.hh"
0047
0048 class G4AdjointCSManager;
0049 class G4EmModelManager;
0050 class G4ParticleDefinition;
0051
0052 class G4AdjointBremsstrahlungModel : public G4VEmAdjointModel
0053 {
0054  public:
0055   explicit G4AdjointBremsstrahlungModel(G4VEmModel* aModel);
0056
0057   G4AdjointBremsstrahlungModel();
0058
0059   ~G4AdjointBremsstrahlungModel() override;
0060
0061   void SampleSecondaries(const G4Track& aTrack, G4bool isScatProjToProj,
0062                          G4ParticleChange* fParticleChange) override;
0063
0064   void RapidSampleSecondaries(const G4Track& aTrack, G4bool isScatProjToProj,
0065                               G4ParticleChange* fParticleChange);
0066
0067   G4double DiffCrossSectionPerVolumePrimToSecond(
0068     const G4Material* aMaterial,
0069     G4double kinEnergyProj,  // kinetic energy of the primary particle before
0070                              // the interaction
0071     G4double kinEnergyProd   // kinetic energy of the secondary particle
0072     ) override;
0073
0074   G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
0075                                G4double primEnergy,
0076                                G4bool isScatProjToProj) override;
0077
0078   G4AdjointBremsstrahlungModel(G4AdjointBremsstrahlungModel&) = delete;
0079   G4AdjointBremsstrahlungModel& operator=(
0080     const G4AdjointBremsstrahlungModel& right) = delete;
0081
0082  private:
0083   void Initialize();
0084
0085   G4EmModelManager* fEmModelManagerForFwdModels;
0086   G4AdjointCSManager* fCSManager;
0087   G4ParticleDefinition* fElectron;
0088   G4ParticleDefinition* fGamma;
0089
0090   G4double fLastCZ = 0.;
0091
0092   G4bool fIsDirectModelInitialised = false;
0093 };
0094
0095 #endif