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25 // 25 //
>> 26 // $Id: G4MuPairProduction.cc,v 1.48 2007/05/22 17:35:58 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-01 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class file 31 // GEANT4 Class file
30 // 32 //
31 // 33 //
32 // File name: G4MuPairProduction 34 // File name: G4MuPairProduction
33 // 35 //
34 // Author: Laszlo Urban 36 // Author: Laszlo Urban
35 // 37 //
36 // Creation date: 30.05.1998 38 // Creation date: 30.05.1998
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 41 //
40 // 04-06-98 in DoIt,secondary production condi 42 // 04-06-98 in DoIt,secondary production condition:
41 // range>std::min(threshold,safety) 43 // range>std::min(threshold,safety)
42 // 26-10-98 new stuff from R. Kokoulin + clean 44 // 26-10-98 new stuff from R. Kokoulin + cleanup , L.Urban
43 // 06-05-99 bug fixed , L.Urban 45 // 06-05-99 bug fixed , L.Urban
44 // 10-02-00 modifications+bug fix , new e.m. s 46 // 10-02-00 modifications+bug fix , new e.m. structure, L.Urban
45 // 29-05-01 V.Ivanchenko minor changes to prov 47 // 29-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
46 // 10-08-01 new methods Store/Retrieve Physics 48 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
47 // 17-09-01 migration of Materials to pure STL 49 // 17-09-01 migration of Materials to pure STL (mma)
48 // 20-09-01 (L.Urban) in ComputeMicroscopicCro 50 // 20-09-01 (L.Urban) in ComputeMicroscopicCrossSection, remove:
49 // if(MaxPairEnergy<CutInPairEnergy) 51 // if(MaxPairEnergy<CutInPairEnergy) MaxPairEnergy=CutInPairEnergy
50 // 26-09-01 completion of store/retrieve Physi 52 // 26-09-01 completion of store/retrieve PhysicsTable
51 // 28-09-01 suppression of theMuonPlus ..etc.. 53 // 28-09-01 suppression of theMuonPlus ..etc..data members (mma)
52 // 29-10-01 all static functions no more inlin 54 // 29-10-01 all static functions no more inlined (mma)
53 // 07-11-01 particleMass becomes a local varia 55 // 07-11-01 particleMass becomes a local variable (mma)
54 // 19-08-02 V.Ivanchenko update to new design 56 // 19-08-02 V.Ivanchenko update to new design
55 // 23-12-02 Change interface in order to move 57 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
56 // 26-12-02 Secondary production moved to deri 58 // 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
57 // 13-02-03 SubCutoff regime is assigned to a 59 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
58 // 08-08-03 STD substitute standard (V.Ivanch 60 // 08-08-03 STD substitute standard (V.Ivanchenko)
59 // 27-09-03 e+ set to be a secondary particle 61 // 27-09-03 e+ set to be a secondary particle (V.Ivanchenko)
60 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossPro 62 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
61 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 63 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
62 // 17-08-04 Utilise mu+ tables for mu- (V.Ivan 64 // 17-08-04 Utilise mu+ tables for mu- (V.Ivanchenko)
63 // 08-11-04 Migration to new interface of Stor 65 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
64 // 08-04-05 Major optimisation of internal int 66 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
65 // 67 //
66 // ------------------------------------------- 68 // -------------------------------------------------------------------
67 // 69 //
68 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
70 72
71 #include "G4MuPairProduction.hh" 73 #include "G4MuPairProduction.hh"
72 #include "G4SystemOfUnits.hh" << 74 #include "G4Electron.hh"
73 #include "G4Positron.hh" 75 #include "G4Positron.hh"
74 #include "G4VEmModel.hh" << 76 #include "G4MuonPlus.hh"
>> 77 #include "G4MuonMinus.hh"
75 #include "G4MuPairProductionModel.hh" 78 #include "G4MuPairProductionModel.hh"
76 #include "G4ElementData.hh" << 79 #include "G4UniversalFluctuation.hh"
77 #include "G4EmParameters.hh" <<
78 80
79 //....oooOO0OOooo........oooOO0OOooo........oo 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
80 82
>> 83 using namespace std;
>> 84
81 G4MuPairProduction::G4MuPairProduction(const G 85 G4MuPairProduction::G4MuPairProduction(const G4String& name)
82 : G4VEnergyLossProcess(name), 86 : G4VEnergyLossProcess(name),
83 lowestKinEnergy(0.85*CLHEP::GeV) << 87 theParticle(0),
84 { << 88 theBaseParticle(0),
85 SetProcessSubType(fPairProdByCharged); << 89 lowestKinEnergy(1.*GeV),
86 SetSecondaryParticle(G4Positron::Positron()) << 90 isInitialised(false)
87 SetIonisation(false); << 91 {}
88 } <<
89 92
90 //....oooOO0OOooo........oooOO0OOooo........oo 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
91 94
92 G4bool G4MuPairProduction::IsApplicable(const << 95 G4MuPairProduction::~G4MuPairProduction()
93 { << 96 {}
94 return (p.GetPDGCharge() != 0.0); <<
95 } <<
96 97
97 //....oooOO0OOooo........oooOO0OOooo........oo 98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98 99
99 G4double G4MuPairProduction::MinPrimaryEnergy( << 100 void G4MuPairProduction::InitialiseEnergyLossProcess(const G4ParticleDefinition* part,
100 const G4Material*, << 101 const G4ParticleDefinition*)
101 G4double) <<
102 { 102 {
103 return lowestKinEnergy; << 103 if (!isInitialised) {
104 } << 104 isInitialised = true;
105 <<
106 //....oooOO0OOooo........oooOO0OOooo........oo <<
107 105
108 void G4MuPairProduction::InitialiseEnergyLossP << 106 theParticle = part;
109 const G4ParticleDefin << 107 SetSecondaryParticle(G4Positron::Positron());
110 const G4ParticleDefinition*) << 108 SetIonisation(false);
111 { <<
112 if (isInitialised) { return; } <<
113 isInitialised = true; <<
114 109
115 theParticle = part; << 110 G4MuPairProductionModel* em = new G4MuPairProductionModel();
116 << 111 em->SetLowestKineticEnergy(lowestKinEnergy);
117 G4VEmModel* mod = EmModel(0); << 112 G4VEmFluctuationModel* fm = new G4UniversalFluctuation();
118 if(nullptr == mod) { << 113 em->SetLowEnergyLimit(0.1*keV);
119 lowestKinEnergy = std::max(lowestKinEnergy << 114 em->SetHighEnergyLimit(100.0*TeV);
120 auto ptr = new G4MuPairProductionModel(par << 115 AddEmModel(1, em, fm);
121 ptr->SetLowestKineticEnergy(lowestKinEnerg <<
122 mod = ptr; <<
123 SetEmModel(mod); <<
124 } 116 }
125 <<
126 G4VEmFluctuationModel* fm = nullptr; <<
127 G4EmParameters* param = G4EmParameters::Inst <<
128 mod->SetLowEnergyLimit(param->MinKinEnergy() <<
129 mod->SetHighEnergyLimit(param->MaxKinEnergy( <<
130 mod->SetSecondaryThreshold(param->MuHadBrems <<
131 AddEmModel(1, mod, fm); <<
132 } 117 }
133 118
134 //....oooOO0OOooo........oooOO0OOooo........oo 119 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
135 120
136 void G4MuPairProduction::StreamProcessInfo(std << 121 void G4MuPairProduction::PrintInfo()
137 { 122 {
138 G4ElementData* ed = EmModel()->GetElementDat << 123 G4cout << " Parametrised model "
139 if(ed) { << 124 << G4endl;
140 for(G4int Z=1; Z<93; ++Z) { <<
141 G4Physics2DVector* pv = ed->GetElement2D <<
142 if(pv) { <<
143 out << " Sampling table " << pv-> <<
144 << "x" << pv->GetLengthX() << "; from " <<
145 << std::exp(pv->GetY(0))/GeV << " GeV to <<
146 << std::exp(pv->GetY(pv->GetLengthY()-1) <<
147 << " TeV " << G4endl; <<
148 break; <<
149 } <<
150 } <<
151 } <<
152 } 125 }
153 126
154 //....oooOO0OOooo........oooOO0OOooo........oo 127 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
155 128
156 void G4MuPairProduction::ProcessDescription(st <<
157 { <<
158 out << " Electron-positron pair production <<
159 G4VEnergyLossProcess::ProcessDescription(out <<
160 } <<
161 129
162 //....oooOO0OOooo........oooOO0OOooo........oo << 130
>> 131
163 132