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25 // 25 //
26 // ------------------------------------------- 26 // -------------------------------------------------------------------
27 // 27 //
28 // Geant4 Class header file << 28 // GEANT4 Class header file
>> 29 //
29 // 30 //
30 // File name: G4PolarizedCompton 31 // File name: G4PolarizedCompton
31 // 32 //
32 // Author: Andreas Schaelicke 33 // Author: Andreas Schaelicke
33 // based on code by Michel Mair 34 // based on code by Michel Maire / Vladimir IVANTCHENKO
34 // <<
35 // Class description 35 // Class description
36 // polarized version of Compton scattering << 36 //
>> 37 // modified version respecting media and beam polarization
>> 38 // using the stokes formalism
>> 39 //
>> 40 // Creation date: 01.05.2005
>> 41 //
>> 42 // Modifications:
>> 43 //
>> 44 // 01-01-05, include polarization description (A.Stahl)
>> 45 // 01-01-05, create asymmetry table and determine interactionlength (A.Stahl)
>> 46 // 01-05-05, update handling of media polarization (A.Schalicke)
>> 47 // 01-05-05, update polarized differential cross section (A.Schalicke)
>> 48 // 26-07-06, cross section recalculated (P.Starovoitov)
>> 49 // 09-08-06, make it work under current geant4 release (A.Schalicke)
>> 50 // 11-06-07, add PostStepGetPhysicalInteractionLength (A.Schalicke)
37 // 51 //
38 // ------------------------------------------- 52 // -----------------------------------------------------------------------------
39 53
>> 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 56
40 #ifndef PolarizedComptonScattering_h 57 #ifndef PolarizedComptonScattering_h
41 #define PolarizedComptonScattering_h 1 58 #define PolarizedComptonScattering_h 1
42 59
43 #include "globals.hh" 60 #include "globals.hh"
44 #include "G4Gamma.hh" <<
45 #include "G4VEmProcess.hh" 61 #include "G4VEmProcess.hh"
>> 62 #include "G4Gamma.hh"
>> 63
>> 64 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 65
47 class G4DynamicParticle; <<
48 class G4MaterialCutsCouple; <<
49 class G4ParticleDefinition; 66 class G4ParticleDefinition;
>> 67 class G4VEmModel;
>> 68 class G4MaterialCutsCouple;
>> 69 class G4DynamicParticle;
>> 70
50 class G4PolarizedComptonModel; 71 class G4PolarizedComptonModel;
51 72
52 class G4PolarizedCompton : public G4VEmProcess 73 class G4PolarizedCompton : public G4VEmProcess
53 74
54 { 75 {
55 public: << 76 public: // with description
56 explicit G4PolarizedCompton(const G4String& <<
57 G4ProcessType ty <<
58 <<
59 virtual ~G4PolarizedCompton() override; <<
60 <<
61 // true for Gamma only. <<
62 virtual G4bool IsApplicable(const G4Particle <<
63 <<
64 virtual void ProcessDescription(std::ostream <<
65 virtual void DumpInfo() const override { Pro <<
66 77
67 void SetModel(const G4String& name); << 78 G4PolarizedCompton(const G4String& processName ="pol-compt",
>> 79 G4ProcessType type = fElectromagnetic);
68 80
69 G4PolarizedCompton& operator=(const G4Polari << 81 virtual ~G4PolarizedCompton();
70 G4PolarizedCompton(const G4PolarizedCompton& <<
71 82
72 protected: << 83 // true for Gamma only.
73 virtual void InitialiseProcess(const G4Parti << 84 G4bool IsApplicable(const G4ParticleDefinition&);
74 85
75 virtual void BuildPhysicsTable(const G4Parti << 86 // Print few lines of informations about the process: validity range,
>> 87 virtual void PrintInfo();
76 88
77 virtual G4double GetMeanFreePath(const G4Tra << 89 void SetModel(const G4String& name);
78 G4double pr <<
79 G4ForceCond <<
80 90
81 virtual G4double PostStepGetPhysicalInteract << 91 protected:
82 const G4Track& track, G4double previousSte <<
83 G4ForceCondition* condition) override; <<
84 92
85 private: << 93 virtual void InitialiseProcess(const G4ParticleDefinition*);
86 static G4PhysicsTable* theAsymmetryTable; / <<
87 void CleanTable(); <<
88 94
>> 95 // added for polarization treatment of polarized media:
>> 96 virtual void BuildPhysicsTable(const G4ParticleDefinition&);
>> 97 virtual void PreparePhysicsTable(const G4ParticleDefinition&);
89 void BuildAsymmetryTable(const G4ParticleDef 98 void BuildAsymmetryTable(const G4ParticleDefinition& part);
>> 99 G4double ComputeAsymmetry(G4double energy,
>> 100 const G4MaterialCutsCouple* couple,
>> 101 const G4ParticleDefinition& particle,
>> 102 G4double cut,
>> 103 G4double & tAsymmetry);
>> 104
>> 105 virtual G4double GetMeanFreePath(const G4Track& aTrack,
>> 106 G4double previousStepSize,
>> 107 G4ForceCondition* condition);
>> 108 virtual G4double PostStepGetPhysicalInteractionLength(
>> 109 const G4Track& track,
>> 110 G4double previousStepSize,
>> 111 G4ForceCondition* condition
>> 112 );
>> 113
>> 114 // can be removed as soon as G4PolarizationChangeForGamma is fixed!
>> 115 // virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
>> 116
>> 117 private:
>> 118
>> 119 G4PolarizedCompton& operator=(const G4PolarizedCompton &right);
>> 120 G4PolarizedCompton(const G4PolarizedCompton& );
>> 121
>> 122 G4bool buildAsymmetryTable;
>> 123 G4bool useAsymmetryTable;
>> 124
>> 125 G4bool isInitialised;
>> 126 G4VEmModel* selectedModel;
>> 127 G4int mType;
>> 128
>> 129 // added for polarization treatment:
>> 130 G4PolarizedComptonModel* emModel;
>> 131 G4PhysicsTable* theAsymmetryTable; // table for crosssection assymmetry
>> 132 G4ThreeVector targetPolarization;
>> 133 };
90 134
91 G4double ComputeAsymmetry(G4double energy, c << 135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
92 const G4ParticleDe << 136 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
93 G4double& tAsymmet <<
94 <<
95 G4double ComputeSaturationFactor(const G4Tra <<
96 <<
97 G4PolarizedComptonModel* fEmModel; <<
98 <<
99 G4int fType; <<
100 <<
101 G4bool fBuildAsymmetryTable; <<
102 G4bool fUseAsymmetryTable; <<
103 137
104 G4bool fIsInitialised; << 138 inline G4bool G4PolarizedCompton::IsApplicable(const G4ParticleDefinition& p)
105 }; << 139 {
>> 140 return (&p == G4Gamma::Gamma());
>> 141 }
106 142
107 //....oooOO0OOooo........oooOO0OOooo........oo 143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
108 << 144
109 #endif 145 #endif
>> 146
110 147