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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4VMscModel
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 07.03.2008
37 //
38 // Modifications:
39 //
40 //
41 // Class Description:
42 //
43 // General interface to msc models
44
45 // -------------------------------------------------------------------
46 //
47
48 #include "G4VMscModel.hh"
49 #include "G4SystemOfUnits.hh"
50 #include "G4ParticleChangeForMSC.hh"
51 #include "G4TransportationManager.hh"
52 #include "G4LossTableManager.hh"
53 #include "G4LossTableBuilder.hh"
54 #include "G4EmParameters.hh"
55
56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
58
59 G4VMscModel::G4VMscModel(const G4String& nam):
60 G4VEmModel(nam),
61 lambdalimit(1.*CLHEP::mm),
62 geomMin(1.e-6*CLHEP::mm),
63 geomMax(1.e50*CLHEP::mm),
64 fDisplacement(0.,0.,0.),
65 steppingAlgorithm(fUseSafety)
66 {
67 dedx = 2.0*CLHEP::MeV*CLHEP::cm2/CLHEP::g;
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71
72 G4VMscModel::~G4VMscModel() = default;
73
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75
76 G4ParticleChangeForMSC*
77 G4VMscModel::GetParticleChangeForMSC(const G4ParticleDefinition*)
78 {
79 // recomputed for each new run
80 if(nullptr == safetyHelper) {
81 safetyHelper = G4TransportationManager::GetTransportationManager()
82 ->GetSafetyHelper();
83 safetyHelper->InitialiseHelper();
84 }
85 G4ParticleChangeForMSC* change = nullptr;
86 if (nullptr != pParticleChange) {
87 change = static_cast<G4ParticleChangeForMSC*>(pParticleChange);
88 } else {
89 change = new G4ParticleChangeForMSC();
90 }
91 return change;
92 }
93
94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
95
96 void G4VMscModel::InitialiseParameters(const G4ParticleDefinition* part)
97 {
98 if(IsLocked()) { return; }
99 G4EmParameters* param = G4EmParameters::Instance();
100 if(std::abs(part->GetPDGEncoding()) == 11) {
101 steppingAlgorithm = param->MscStepLimitType();
102 facrange = param->MscRangeFactor();
103 latDisplasment = param->LateralDisplacement();
104 } else {
105 steppingAlgorithm = param->MscMuHadStepLimitType();
106 facrange = param->MscMuHadRangeFactor();
107 latDisplasment = param->MuHadLateralDisplacement();
108 }
109 skin = param->MscSkin();
110 facgeom = param->MscGeomFactor();
111 facsafety = param->MscSafetyFactor();
112 lambdalimit = param->MscLambdaLimit();
113 }
114
115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
116
117 void G4VMscModel::DumpParameters(std::ostream& out) const
118 {
119 G4String alg = "UseSafety";
120 if (steppingAlgorithm == fUseDistanceToBoundary) alg = "DistanceToBoundary";
121 else if (steppingAlgorithm == fMinimal) alg = "Minimal";
122 else if (steppingAlgorithm == fUseSafetyPlus) alg = "SafetyPlus";
123
124 out << std::setw(18) << "StepLim=" << alg << " Rfact=" << facrange
125 << " Gfact=" << facgeom << " Sfact=" << facsafety << " DispFlag:" << latDisplasment
126 << " Skin=" << skin << " Llim=" << lambdalimit/CLHEP::mm << " mm" << G4endl;
127 }
128
129 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
130
131 void G4VMscModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
132 const G4MaterialCutsCouple*,
133 const G4DynamicParticle*,
134 G4double, G4double)
135 {}
136
137 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
138
139 G4double G4VMscModel::GetDEDX(const G4ParticleDefinition* part, G4double kinEnergy,
140 const G4MaterialCutsCouple* couple)
141 {
142 G4double x;
143 if (nullptr != ionisation) {
144 x = ionisation->GetDEDX(kinEnergy, couple);
145 } else {
146 const G4double q = part->GetPDGCharge()*inveplus;
147 x = dedx*q*q;
148 }
149 return x;
150 }
151
152 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
153
154 G4double G4VMscModel::GetDEDX(const G4ParticleDefinition* part, G4double kinEnergy,
155 const G4MaterialCutsCouple* couple, G4double logKinEnergy)
156 {
157 G4double x;
158 if (nullptr != ionisation) {
159 x = ionisation->GetDEDX(kinEnergy, couple, logKinEnergy);
160 } else {
161 const G4double q = part->GetPDGCharge()*inveplus;
162 x = dedx*q*q;
163 }
164 return x;
165 }
166
167 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
168
169 G4double G4VMscModel::GetRange(const G4ParticleDefinition* part, G4double kinEnergy,
170 const G4MaterialCutsCouple* couple)
171 {
172 // << ionisation << " " << part->GetParticleName() << G4endl;
173 localtkin = kinEnergy;
174 if (nullptr != ionisation) {
175 localrange = ionisation->GetRange(kinEnergy, couple);
176 } else {
177 const G4double q = part->GetPDGCharge()*inveplus;
178 localrange = kinEnergy/(dedx*q*q*couple->GetMaterial()->GetDensity());
179 }
180 //G4cout << "R(mm)= " << localrange << " " << ionisation << G4endl;
181 return localrange;
182 }
183
184 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
185
186 G4double G4VMscModel::GetRange(const G4ParticleDefinition* part,G4double kinEnergy,
187 const G4MaterialCutsCouple* couple, G4double logKinEnergy)
188 {
189 //G4cout << "G4VMscModel::GetRange E(MeV)= " << kinEnergy << " "
190 // << ionisation << " " << part->GetParticleName() << G4endl;
191 localtkin = kinEnergy;
192 if (nullptr != ionisation) {
193 localrange = ionisation->GetRange(kinEnergy, couple, logKinEnergy);
194 } else {
195 const G4double q = part->GetPDGCharge()*inveplus;
196 localrange = kinEnergy/(dedx*q*q*couple->GetMaterial()->GetDensity());
197 }
198 //G4cout << "R(mm)= " << localrange << " " << ionisation << G4endl;
199 return localrange;
200 }
201
202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
203
204 G4double G4VMscModel::GetEnergy(const G4ParticleDefinition* part,
205 G4double range, const G4MaterialCutsCouple* couple)
206 {
207 G4double e;
208 //G4cout << "G4VMscModel::GetEnergy R(mm)= " << range << " " << ionisation
209 // << " Rlocal(mm)= " << localrange << " Elocal(MeV)= " << localtkin << G4endl;
210 if(nullptr != ionisation) { e = ionisation->GetKineticEnergy(range, couple); }
211 else {
212 e = localtkin;
213 if(localrange > range) {
214 G4double q = part->GetPDGCharge()*inveplus;
215 e -= (localrange - range)*dedx*q*q*couple->GetMaterial()->GetDensity();
216 }
217 }
218 return e;
219 }
220
221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222