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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4LowEWentzelVIModel 32 // File name: G4LowEWentzelVIModel
33 // 33 //
34 // Author: V.Ivanchenko 34 // Author: V.Ivanchenko
35 // 35 //
36 // Creation date: 11.02.2014 from G4WentzelVIM 36 // Creation date: 11.02.2014 from G4WentzelVIModel
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // Class Description: 40 // Class Description:
41 // 41 //
42 42
43 // ------------------------------------------- 43 // -------------------------------------------------------------------
44 // 44 //
45 45
46 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
48 48
49 #include "G4LowEWentzelVIModel.hh" 49 #include "G4LowEWentzelVIModel.hh"
50 #include "G4PhysicalConstants.hh" 50 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh" 51 #include "G4SystemOfUnits.hh"
52 52
53 //....oooOO0OOooo........oooOO0OOooo........oo 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 54
55 G4LowEWentzelVIModel::G4LowEWentzelVIModel() : 55 G4LowEWentzelVIModel::G4LowEWentzelVIModel() :
56 G4WentzelVIModel(true, "LowEnWentzelVI") 56 G4WentzelVIModel(true, "LowEnWentzelVI")
57 { 57 {
58 SetSingleScatteringFactor(0.5); 58 SetSingleScatteringFactor(0.5);
59 } 59 }
60 60
61 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
62 62
63 G4double G4LowEWentzelVIModel::ComputeTruePath 63 G4double G4LowEWentzelVIModel::ComputeTruePathLengthLimit(
64 const G4Track& tr 64 const G4Track& track,
65 G4double& currentMinimalStep) 65 G4double& currentMinimalStep)
66 { 66 {
67 G4double tlimit = currentMinimalStep; 67 G4double tlimit = currentMinimalStep;
68 const G4DynamicParticle* dp = track.GetDynam 68 const G4DynamicParticle* dp = track.GetDynamicParticle();
69 G4StepPoint* sp = track.GetStep()->GetPreSte 69 G4StepPoint* sp = track.GetStep()->GetPreStepPoint();
70 G4StepStatus stepStatus = sp->GetStepStatus( 70 G4StepStatus stepStatus = sp->GetStepStatus();
71 singleScatteringMode = false; 71 singleScatteringMode = false;
72 72
73 // initialisation for each step, lambda may 73 // initialisation for each step, lambda may be computed from scratch
74 preKinEnergy = dp->GetKineticEnergy(); 74 preKinEnergy = dp->GetKineticEnergy();
75 DefineMaterial(track.GetMaterialCutsCouple() 75 DefineMaterial(track.GetMaterialCutsCouple());
76 lambdaeff = GetTransportMeanFreePath(particl 76 lambdaeff = GetTransportMeanFreePath(particle,preKinEnergy);
77 currentRange = GetRange(particle,preKinEnerg 77 currentRange = GetRange(particle,preKinEnergy,currentCouple);
78 cosTetMaxNuc = wokvi->SetupKinematic(preKinE 78 cosTetMaxNuc = wokvi->SetupKinematic(preKinEnergy, currentMaterial);
79 79
80 // extra check for abnormal situation 80 // extra check for abnormal situation
81 // this check needed to run MSC with eIoni a 81 // this check needed to run MSC with eIoni and eBrem inactivated
82 tlimit = std::min(tlimit, currentRange); 82 tlimit = std::min(tlimit, currentRange);
83 83
84 // stop here if small range particle 84 // stop here if small range particle
85 if(tlimit < tlimitminfix) { 85 if(tlimit < tlimitminfix) {
86 return ConvertTrueToGeom(tlimit, currentMi 86 return ConvertTrueToGeom(tlimit, currentMinimalStep);
87 } 87 }
88 88
89 // pre step 89 // pre step
90 G4double presafety = sp->GetSafety(); 90 G4double presafety = sp->GetSafety();
91 // far from geometry boundary 91 // far from geometry boundary
92 if(currentRange < presafety) { 92 if(currentRange < presafety) {
93 return ConvertTrueToGeom(tlimit, currentMi 93 return ConvertTrueToGeom(tlimit, currentMinimalStep);
94 } 94 }
95 95
96 // compute presafety again if presafety <= 0 96 // compute presafety again if presafety <= 0 and no boundary
97 // i.e. when it is needed for optimization p 97 // i.e. when it is needed for optimization purposes
98 if(stepStatus != fGeomBoundary && presafety 98 if(stepStatus != fGeomBoundary && presafety < tlimitminfix) {
99 presafety = ComputeSafety(sp->GetPosition( 99 presafety = ComputeSafety(sp->GetPosition(), tlimit);
100 if(currentRange < presafety) { 100 if(currentRange < presafety) {
101 return ConvertTrueToGeom(tlimit, current 101 return ConvertTrueToGeom(tlimit, currentMinimalStep);
102 } 102 }
103 } 103 }
104 /* 104 /*
105 G4cout << "e(MeV)= " << preKinEnergy/MeV 105 G4cout << "e(MeV)= " << preKinEnergy/MeV
106 << " " << particle->GetParticleName() 106 << " " << particle->GetParticleName()
107 << " CurLimit(mm)= " << tlimit/mm <<" safet 107 << " CurLimit(mm)= " << tlimit/mm <<" safety(mm)= " << presafety/mm
108 << " R(mm)= " <<currentRange/mm 108 << " R(mm)= " <<currentRange/mm
109 << " L0(mm^-1)= " << lambdaeff*mm 109 << " L0(mm^-1)= " << lambdaeff*mm
110 <<G4endl; 110 <<G4endl;
111 */ 111 */
112 // natural limit for high energy 112 // natural limit for high energy
113 G4double rlimit = std::max(facrange*currentR 113 G4double rlimit = std::max(facrange*currentRange, lambdaeff);
114 114
115 // low-energy e- 115 // low-energy e-
116 rlimit = std::max(rlimit, facsafety*presafet 116 rlimit = std::max(rlimit, facsafety*presafety);
117 117
118 tlimit = std::min(tlimit, rlimit); 118 tlimit = std::min(tlimit, rlimit);
119 tlimit = std::max(tlimit, tlimitminfix); 119 tlimit = std::max(tlimit, tlimitminfix);
120 120
121 // step limit in infinite media 121 // step limit in infinite media
122 tlimit = std::min(tlimit, 50*currentMaterial 122 tlimit = std::min(tlimit, 50*currentMaterial->GetRadlen()/facgeom);
123 123
124 //compute geomlimit and force few steps with 124 //compute geomlimit and force few steps within a volume
125 if (steppingAlgorithm == fUseDistanceToBound 125 if (steppingAlgorithm == fUseDistanceToBoundary
126 && stepStatus == fGeomBoundary) { 126 && stepStatus == fGeomBoundary) {
127 127
128 G4double geomlimit = ComputeGeomLimit(trac 128 G4double geomlimit = ComputeGeomLimit(track, presafety, currentRange);
129 tlimit = std::min(tlimit, geomlimit/facgeo 129 tlimit = std::min(tlimit, geomlimit/facgeom);
130 } 130 }
131 /* 131 /*
132 G4cout << particle->GetParticleName() << " E 132 G4cout << particle->GetParticleName() << " E(MeV)= " << preKinEnergy
133 << " L0= " << lambdaeff << " R= " << curren 133 << " L0= " << lambdaeff << " R= " << currentRange
134 << " tlimit= " << tlimit 134 << " tlimit= " << tlimit
135 << " currentMinimalStep= " << currentMini 135 << " currentMinimalStep= " << currentMinimalStep << G4endl;
136 */ 136 */
137 return ConvertTrueToGeom(tlimit, currentMini 137 return ConvertTrueToGeom(tlimit, currentMinimalStep);
138 } 138 }
139 139
140 //....oooOO0OOooo........oooOO0OOooo........oo 140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
141 141