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25 // 25 //
>> 26 // $Id: G4VMscModel.cc,v 1.18 2010-09-07 16:05:33 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-04-patch-02 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class file 31 // GEANT4 Class file
30 // 32 //
31 // 33 //
32 // File name: G4VMscModel 34 // File name: G4VMscModel
33 // 35 //
34 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
35 // 37 //
36 // Creation date: 07.03.2008 38 // Creation date: 07.03.2008
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 41 //
40 // 42 //
41 // Class Description: 43 // Class Description:
42 // 44 //
43 // General interface to msc models 45 // General interface to msc models
44 46
45 // ------------------------------------------- 47 // -------------------------------------------------------------------
46 // 48 //
47 49
48 #include "G4VMscModel.hh" 50 #include "G4VMscModel.hh"
49 #include "G4SystemOfUnits.hh" <<
50 #include "G4ParticleChangeForMSC.hh" 51 #include "G4ParticleChangeForMSC.hh"
51 #include "G4TransportationManager.hh" 52 #include "G4TransportationManager.hh"
52 #include "G4LossTableManager.hh" <<
53 #include "G4LossTableBuilder.hh" <<
54 #include "G4EmParameters.hh" <<
55 53
56 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
57 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
58 56
59 G4VMscModel::G4VMscModel(const G4String& nam): 57 G4VMscModel::G4VMscModel(const G4String& nam):
60 G4VEmModel(nam), 58 G4VEmModel(nam),
61 lambdalimit(1.*CLHEP::mm), << 59 safetyHelper(0),
>> 60 facrange(0.04),
>> 61 facgeom(2.5),
>> 62 facsafety(0.3),
>> 63 skin(1.0),
>> 64 dtrl(0.05),
>> 65 lambdalimit(mm),
62 geomMin(1.e-6*CLHEP::mm), 66 geomMin(1.e-6*CLHEP::mm),
63 geomMax(1.e50*CLHEP::mm), 67 geomMax(1.e50*CLHEP::mm),
64 fDisplacement(0.,0.,0.), << 68 steppingAlgorithm(fUseSafety),
65 steppingAlgorithm(fUseSafety) << 69 samplez(false),
66 { << 70 latDisplasment(true)
67 dedx = 2.0*CLHEP::MeV*CLHEP::cm2/CLHEP::g; << 71 {}
68 } <<
69 72
70 //....oooOO0OOooo........oooOO0OOooo........oo 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71 74
72 G4VMscModel::~G4VMscModel() = default; << 75 G4VMscModel::~G4VMscModel()
>> 76 {}
73 77
74 //....oooOO0OOooo........oooOO0OOooo........oo 78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75 79
76 G4ParticleChangeForMSC* << 80 G4ParticleChangeForMSC* G4VMscModel::GetParticleChangeForMSC()
77 G4VMscModel::GetParticleChangeForMSC(const G4P <<
78 { 81 {
79 // recomputed for each new run << 82 G4ParticleChangeForMSC* p = 0;
80 if(nullptr == safetyHelper) { << 83 if (pParticleChange) {
81 safetyHelper = G4TransportationManager::Ge << 84 p = static_cast<G4ParticleChangeForMSC*>(pParticleChange);
82 ->GetSafetyHelper(); <<
83 safetyHelper->InitialiseHelper(); <<
84 } <<
85 G4ParticleChangeForMSC* change = nullptr; <<
86 if (nullptr != pParticleChange) { <<
87 change = static_cast<G4ParticleChangeForMS <<
88 } else { 85 } else {
89 change = new G4ParticleChangeForMSC(); << 86 p = new G4ParticleChangeForMSC();
90 } 87 }
91 return change; << 88 return p;
92 } 89 }
93 90
94 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
95 92
96 void G4VMscModel::InitialiseParameters(const G << 93 void G4VMscModel::InitialiseSafetyHelper()
97 { 94 {
98 if(IsLocked()) { return; } << 95 if(!safetyHelper) {
99 G4EmParameters* param = G4EmParameters::Inst << 96 safetyHelper = G4TransportationManager::GetTransportationManager()
100 if(std::abs(part->GetPDGEncoding()) == 11) { << 97 ->GetSafetyHelper();
101 steppingAlgorithm = param->MscStepLimitTyp << 98 safetyHelper->InitialiseHelper();
102 facrange = param->MscRangeFactor(); <<
103 latDisplasment = param->LateralDisplacemen <<
104 } else { <<
105 steppingAlgorithm = param->MscMuHadStepLim <<
106 facrange = param->MscMuHadRangeFactor(); <<
107 latDisplasment = param->MuHadLateralDispla <<
108 } 99 }
109 skin = param->MscSkin(); <<
110 facgeom = param->MscGeomFactor(); <<
111 facsafety = param->MscSafetyFactor(); <<
112 lambdalimit = param->MscLambdaLimit(); <<
113 } 100 }
114 101
115 //....oooOO0OOooo........oooOO0OOooo........oo 102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
116 103
117 void G4VMscModel::DumpParameters(std::ostream& << 104 void G4VMscModel::ComputeDisplacement(G4ParticleChangeForMSC* fParticleChange,
>> 105 const G4ThreeVector& dir,
>> 106 G4double displacement,
>> 107 G4double postsafety)
118 { 108 {
119 G4String alg = "UseSafety"; << 109 if(displacement <= geomMin) { return; }
120 if (steppingAlgorithm == fUseDistanceToBound << 110 const G4ThreeVector* pos = fParticleChange->GetProposedPosition();
121 else if (steppingAlgorithm == fMinimal) alg <<
122 else if (steppingAlgorithm == fUseSafetyPlus <<
123 111
124 out << std::setw(18) << "StepLim=" << alg << << 112 // displaced point is definitely within the volume
125 << " Gfact=" << facgeom << " Sfact=" << << 113 if(displacement < postsafety) {
126 << " Skin=" << skin << " Llim=" << lambd <<
127 } <<
128 114
129 //....oooOO0OOooo........oooOO0OOooo........oo << 115 // compute new endpoint of the Step
>> 116 G4ThreeVector newPosition = *pos + displacement*dir;
>> 117 safetyHelper->ReLocateWithinVolume(newPosition);
>> 118 fParticleChange->ProposePosition(newPosition);
>> 119 return;
>> 120 }
130 121
131 void G4VMscModel::SampleSecondaries(std::vecto << 122 // displaced point may be outside the volume
132 const G4Ma << 123 G4double newsafety = safetyHelper->ComputeSafety(*pos);
133 const G4Dy <<
134 G4double, <<
135 {} <<
136 124
137 //....oooOO0OOooo........oooOO0OOooo........oo << 125 // add a factor which ensure numerical stability
>> 126 G4double r = std::min(displacement, newsafety*0.99);
138 127
139 G4double G4VMscModel::GetDEDX(const G4Particle << 128 if(r > geomMin) {
140 const G4Material << 129
141 { << 130 // compute new endpoint of the Step
142 G4double x; << 131 G4ThreeVector newPosition = *pos + r*dir;
143 if (nullptr != ionisation) { << 132 safetyHelper->ReLocateWithinVolume(newPosition);
144 x = ionisation->GetDEDX(kinEnergy, couple) << 133 fParticleChange->ProposePosition(newPosition);
145 } else { <<
146 const G4double q = part->GetPDGCharge()*in <<
147 x = dedx*q*q; <<
148 } 134 }
149 return x; <<
150 } 135 }
151 136
152 //....oooOO0OOooo........oooOO0OOooo........oo 137 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
153 138
154 G4double G4VMscModel::GetDEDX(const G4Particle << 139 void G4VMscModel::SampleScattering(const G4DynamicParticle*, G4double)
155 const G4Material << 140 {}
156 { <<
157 G4double x; <<
158 if (nullptr != ionisation) { <<
159 x = ionisation->GetDEDX(kinEnergy, couple, <<
160 } else { <<
161 const G4double q = part->GetPDGCharge()*in <<
162 x = dedx*q*q; <<
163 } <<
164 return x; <<
165 } <<
166 141
167 //....oooOO0OOooo........oooOO0OOooo........oo 142 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
168 143
169 G4double G4VMscModel::GetRange(const G4Particl << 144 G4double G4VMscModel::ComputeTruePathLengthLimit(const G4Track&,
170 const G4Materia << 145 G4PhysicsTable*,
>> 146 G4double)
171 { 147 {
172 // << ionisation << " " << part->GetPartic << 148 return DBL_MAX;
173 localtkin = kinEnergy; <<
174 if (nullptr != ionisation) { <<
175 localrange = ionisation->GetRange(kinEnerg <<
176 } else { <<
177 const G4double q = part->GetPDGCharge()*in <<
178 localrange = kinEnergy/(dedx*q*q*couple->G <<
179 } <<
180 //G4cout << "R(mm)= " << localrange << " " <<
181 return localrange; <<
182 } 149 }
183 150
184 //....oooOO0OOooo........oooOO0OOooo........oo 151 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
185 152
186 G4double G4VMscModel::GetRange(const G4Particl << 153 G4double G4VMscModel::ComputeGeomPathLength(G4double truePathLength)
187 const G4Materia <<
188 { 154 {
189 //G4cout << "G4VMscModel::GetRange E(MeV)= " << 155 return truePathLength;
190 // << ionisation << " " << part->GetPartic <<
191 localtkin = kinEnergy; <<
192 if (nullptr != ionisation) { <<
193 localrange = ionisation->GetRange(kinEnerg <<
194 } else { <<
195 const G4double q = part->GetPDGCharge()*in <<
196 localrange = kinEnergy/(dedx*q*q*couple->G <<
197 } <<
198 //G4cout << "R(mm)= " << localrange << " " <<
199 return localrange; <<
200 } 156 }
201 157
202 //....oooOO0OOooo........oooOO0OOooo........oo 158 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
203 159
204 G4double G4VMscModel::GetEnergy(const G4Partic << 160 G4double G4VMscModel::ComputeTrueStepLength(G4double geomPathLength)
205 G4double range <<
206 { 161 {
207 G4double e; << 162 return geomPathLength;
208 //G4cout << "G4VMscModel::GetEnergy R(mm)= " <<
209 // << " Rlocal(mm)= " << localrange << <<
210 if(nullptr != ionisation) { e = ionisation-> <<
211 else { <<
212 e = localtkin; <<
213 if(localrange > range) { <<
214 G4double q = part->GetPDGCharge()*invepl <<
215 e -= (localrange - range)*dedx*q*q*coupl <<
216 } <<
217 } <<
218 return e; <<
219 } 163 }
>> 164
>> 165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 166
>> 167 void G4VMscModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
>> 168 const G4MaterialCutsCouple*,
>> 169 const G4DynamicParticle*,
>> 170 G4double, G4double)
>> 171 {}
220 172
221 //....oooOO0OOooo........oooOO0OOooo........oo 173 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222 174