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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4mplIonisation
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 25.08.2005
37 //
38 // Modifications:
39 //
40 //
41 // -------------------------------------------------------------------
42 //
43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
45
46 #include "G4mplIonisation.hh"
47 #include "G4PhysicalConstants.hh"
48 #include "G4SystemOfUnits.hh"
49 #include "G4Electron.hh"
50 #include "G4mplIonisationModel.hh"
51 #include "G4mplIonisationWithDeltaModel.hh"
52 #include "G4EmParameters.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55
56 G4mplIonisation::G4mplIonisation(G4double mCharge, const G4String& name)
57 : G4VEnergyLossProcess(name),
58 magneticCharge(mCharge)
59 {
60 // By default classical magnetic charge is used
61 if(magneticCharge == 0.0) { magneticCharge = CLHEP::eplus*0.5/CLHEP::fine_structure_const; }
62
63 SetVerboseLevel(0);
64 SetProcessSubType(fIonisation);
65 SetSecondaryParticle(G4Electron::Electron());
66 }
67
68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69
70 G4mplIonisation::~G4mplIonisation()
71 {}
72
73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74
75 G4bool G4mplIonisation::IsApplicable(const G4ParticleDefinition&)
76 {
77 return true;
78 }
79
80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
81
82 G4double G4mplIonisation::MinPrimaryEnergy(const G4ParticleDefinition* mpl,
83 const G4Material*,
84 G4double cut)
85 {
86 G4double x = 0.5*cut/electron_mass_c2;
87 G4double mass = mpl->GetPDGMass();
88 G4double ratio = electron_mass_c2/mass;
89 G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
90 return mass*(gam - 1.0);
91 }
92
93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
94
95 void G4mplIonisation::InitialiseEnergyLossProcess(const G4ParticleDefinition* p,
96 const G4ParticleDefinition*)
97 {
98 if(isInitialised) { return; }
99
100 // monopole model is responsible both for energy loss and fluctuations
101 G4mplIonisationWithDeltaModel* ion =
102 new G4mplIonisationWithDeltaModel(magneticCharge,"PAI");
103 ion->SetParticle(p);
104
105 // define size of dedx and range tables
106 G4EmParameters* param = G4EmParameters::Instance();
107 G4double emin = std::min(param->MinKinEnergy(),ion->LowEnergyLimit());
108 G4double emax = std::max(param->MaxKinEnergy(),ion->HighEnergyLimit());
109 G4int bin = G4lrint(param->NumberOfBinsPerDecade()*std::log10(emax/emin));
110 ion->SetLowEnergyLimit(emin);
111 ion->SetHighEnergyLimit(emax);
112 SetMinKinEnergy(emin);
113 SetMaxKinEnergy(emax);
114 SetDEDXBinning(bin);
115
116 SetEmModel(ion);
117 AddEmModel(1,ion,ion);
118
119 isInitialised = true;
120 }
121
122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
123
124 void G4mplIonisation::ProcessDescription(std::ostream& out) const
125 {
126 out << "Magnetic monopole ionisation" << G4endl;
127 G4VEnergyLossProcess::ProcessDescription(out);
128 }
129
130 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
131
132