include/Geant4/G4Cerenkov.hh

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0025 //
0026 ////////////////////////////////////////////////////////////////////////
0027 // Cerenkov Radiation Class Definition
0028 ////////////////////////////////////////////////////////////////////////
0029 //
0030 // File:        G4Cerenkov.hh
0031 // Description: Discrete Process - Generation of Cerenkov Photons
0032 // Version:     2.0
0033 // Created:     1996-02-21
0034 // Author:      Juliet Armstrong
0035 // Updated:     2007-09-30 change inheritance to G4VDiscreteProcess
0036 //              2005-07-28 add G4ProcessType to constructor
0037 //              1999-10-29 add method and class descriptors
0038 //              1997-04-09 by Peter Gumplinger
0039 //              > G4MaterialPropertiesTable; new physics/tracking scheme
0040 //
0041 ////////////////////////////////////////////////////////////////////////
0042
0043 #ifndef G4Cerenkov_h
0044 #define G4Cerenkov_h 1
0045
0046 #include "globals.hh"
0047 #include "G4DynamicParticle.hh"
0048 #include "G4ForceCondition.hh"
0049 #include "G4GPILSelection.hh"
0050 #include "G4MaterialPropertyVector.hh"
0051 #include "G4VDiscreteProcess.hh"
0052
0053 #include <map>
0054
0055 class G4Material;
0056 class G4ParticleDefinition;
0057 class G4PhysicsTable;
0058 class G4Step;
0059 class G4Track;
0060 class G4VParticleChange;
0061
0062 class G4Cerenkov : public G4VDiscreteProcess
0063 {
0064  public:
0065   explicit G4Cerenkov(const G4String& processName = "Cerenkov",
0066                       G4ProcessType type = fElectromagnetic);
0067   ~G4Cerenkov() override;
0068
0069   G4Cerenkov(const G4Cerenkov& right) = delete;
0070   G4Cerenkov& operator=(const G4Cerenkov& right) = delete;
0071
0072   G4bool IsApplicable(const G4ParticleDefinition& aParticleType) override;
0073   // Returns true -> 'is applicable', for all charged particles
0074   // except short-lived particles.
0075
0076   void BuildPhysicsTable(const G4ParticleDefinition& aParticleType) override;
0077   // Build table at a right time
0078
0079   void PreparePhysicsTable(const G4ParticleDefinition& part) override;
0080
0081   G4double GetMeanFreePath(const G4Track& aTrack, G4double, G4ForceCondition*) override;
0082   // Returns the discrete step limit and sets the 'StronglyForced'
0083   // condition for the DoIt to be invoked at every step.
0084
0085   G4double PostStepGetPhysicalInteractionLength(const G4Track& aTrack, G4double,
0086                                                 G4ForceCondition*) override;
0087   // Returns the discrete step limit and sets the 'StronglyForced'
0088   // condition for the DoIt to be invoked at every step.
0089
0090   G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
0091                                   const G4Step& aStep) override;
0092   // This is the method implementing the Cerenkov process.
0093
0094   void SetTrackSecondariesFirst(const G4bool state);
0095   // If set, the primary particle tracking is interrupted and any
0096   // produced Cerenkov photons are tracked next. When all have
0097   // been tracked, the tracking of the primary resumes.
0098
0099   G4bool GetTrackSecondariesFirst() const;
0100   // Returns the boolean flag for tracking secondaries first.
0101
0102   void SetMaxBetaChangePerStep(const G4double d);
0103   // Set the maximum allowed change in beta = v/c in % (perCent) per step.
0104
0105   G4double GetMaxBetaChangePerStep() const;
0106   // Returns the maximum allowed change in beta = v/c in % (perCent)
0107
0108   void SetMaxNumPhotonsPerStep(const G4int NumPhotons);
0109   // Set the maximum number of Cerenkov photons allowed to be generated during
0110   // a tracking step. This is an average ONLY; the actual number will vary
0111   // around this average. If invoked, the maximum photon stack will roughly be
0112   // of the size set. If not called, the step is not limited by the number of
0113   // photons generated.
0114
0115   G4int GetMaxNumPhotonsPerStep() const;
0116   // Returns the maximum number of Cerenkov photons allowed to be
0117   // generated during a tracking step.
0118
0119   void SetStackPhotons(const G4bool);
0120   // Call by the user to set the flag for stacking the Cerenkov photons
0121
0122   G4bool GetStackPhotons() const;
0123   // Return the boolean for whether or not the Cerenkov photons are stacked
0124
0125   G4int GetNumPhotons() const;
0126   // Returns the current number of scint. photons (after PostStepDoIt)
0127
0128   G4PhysicsTable* GetPhysicsTable() const;
0129   // Returns the address of the physics table.
0130
0131   void DumpPhysicsTable() const;
0132   // Prints the physics table.
0133
0134   G4double GetAverageNumberOfPhotons(const G4double charge, const G4double beta,
0135                                      const G4Material* aMaterial,
0136                                      G4MaterialPropertyVector* Rindex) const;
0137
0138   void DumpInfo() const override;
0139   void ProcessDescription(std::ostream& out) const override;
0140
0141   void SetVerboseLevel(G4int);
0142   // sets verbosity
0143
0144  protected:
0145   G4PhysicsTable* thePhysicsTable;
0146   std::map<std::size_t, std::size_t> fIndexMPT;
0147
0148  private:
0149   void Initialise();
0150
0151   G4double fMaxBetaChange;
0152
0153   G4int fMaxPhotons;
0154   G4int fNumPhotons;
0155
0156   G4bool fStackingFlag;
0157   G4bool fTrackSecondariesFirst;
0158
0159   G4int secID = -1;  // creator modelID
0160 };
0161
0162 inline G4bool G4Cerenkov::GetTrackSecondariesFirst() const
0163 {
0164   return fTrackSecondariesFirst;
0165 }
0166
0167 inline G4double G4Cerenkov::GetMaxBetaChangePerStep() const
0168 {
0169   return fMaxBetaChange;
0170 }
0171
0172 inline G4int G4Cerenkov::GetMaxNumPhotonsPerStep() const { return fMaxPhotons; }
0173
0174 inline G4bool G4Cerenkov::GetStackPhotons() const { return fStackingFlag; }
0175
0176 inline G4int G4Cerenkov::GetNumPhotons() const { return fNumPhotons; }
0177
0178 inline G4PhysicsTable* G4Cerenkov::GetPhysicsTable() const
0179 {
0180   return thePhysicsTable;
0181 }
0182
0183 #endif /* G4Cerenkov_h */