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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 using namespace std;
>> 56
55 G4LowEWentzelVIModel::G4LowEWentzelVIModel() : 57 G4LowEWentzelVIModel::G4LowEWentzelVIModel() :
56 G4WentzelVIModel(true, "LowEnWentzelVI") << 58 G4WentzelVIModel(false,"LowEnWentzelVI")
57 { 59 {
58 SetSingleScatteringFactor(0.5); 60 SetSingleScatteringFactor(0.5);
59 } 61 }
>> 62
>> 63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 64
>> 65 G4LowEWentzelVIModel::~G4LowEWentzelVIModel()
>> 66 {}
60 67
61 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
62 69
63 G4double G4LowEWentzelVIModel::ComputeTruePath 70 G4double G4LowEWentzelVIModel::ComputeTruePathLengthLimit(
64 const G4Track& tr 71 const G4Track& track,
65 G4double& currentMinimalStep) 72 G4double& currentMinimalStep)
66 { 73 {
67 G4double tlimit = currentMinimalStep; 74 G4double tlimit = currentMinimalStep;
68 const G4DynamicParticle* dp = track.GetDynam 75 const G4DynamicParticle* dp = track.GetDynamicParticle();
69 G4StepPoint* sp = track.GetStep()->GetPreSte 76 G4StepPoint* sp = track.GetStep()->GetPreStepPoint();
70 G4StepStatus stepStatus = sp->GetStepStatus( 77 G4StepStatus stepStatus = sp->GetStepStatus();
71 singleScatteringMode = false; 78 singleScatteringMode = false;
72 79
73 // initialisation for each step, lambda may 80 // initialisation for each step, lambda may be computed from scratch
74 preKinEnergy = dp->GetKineticEnergy(); 81 preKinEnergy = dp->GetKineticEnergy();
75 DefineMaterial(track.GetMaterialCutsCouple() 82 DefineMaterial(track.GetMaterialCutsCouple());
76 lambdaeff = GetTransportMeanFreePath(particl 83 lambdaeff = GetTransportMeanFreePath(particle,preKinEnergy);
77 currentRange = GetRange(particle,preKinEnerg 84 currentRange = GetRange(particle,preKinEnergy,currentCouple);
78 cosTetMaxNuc = wokvi->SetupKinematic(preKinE 85 cosTetMaxNuc = wokvi->SetupKinematic(preKinEnergy, currentMaterial);
79 86
80 // extra check for abnormal situation 87 // extra check for abnormal situation
81 // this check needed to run MSC with eIoni a 88 // this check needed to run MSC with eIoni and eBrem inactivated
82 tlimit = std::min(tlimit, currentRange); 89 tlimit = std::min(tlimit, currentRange);
83 90
84 // stop here if small range particle 91 // stop here if small range particle
85 if(tlimit < tlimitminfix) { 92 if(tlimit < tlimitminfix) {
86 return ConvertTrueToGeom(tlimit, currentMi 93 return ConvertTrueToGeom(tlimit, currentMinimalStep);
87 } 94 }
88 95
89 // pre step 96 // pre step
90 G4double presafety = sp->GetSafety(); 97 G4double presafety = sp->GetSafety();
91 // far from geometry boundary 98 // far from geometry boundary
92 if(currentRange < presafety) { 99 if(currentRange < presafety) {
93 return ConvertTrueToGeom(tlimit, currentMi 100 return ConvertTrueToGeom(tlimit, currentMinimalStep);
94 } 101 }
95 102
96 // compute presafety again if presafety <= 0 103 // compute presafety again if presafety <= 0 and no boundary
97 // i.e. when it is needed for optimization p 104 // i.e. when it is needed for optimization purposes
98 if(stepStatus != fGeomBoundary && presafety 105 if(stepStatus != fGeomBoundary && presafety < tlimitminfix) {
99 presafety = ComputeSafety(sp->GetPosition( 106 presafety = ComputeSafety(sp->GetPosition(), tlimit);
100 if(currentRange < presafety) { 107 if(currentRange < presafety) {
101 return ConvertTrueToGeom(tlimit, current 108 return ConvertTrueToGeom(tlimit, currentMinimalStep);
102 } 109 }
103 } 110 }
104 /* 111 /*
105 G4cout << "e(MeV)= " << preKinEnergy/MeV 112 G4cout << "e(MeV)= " << preKinEnergy/MeV
106 << " " << particle->GetParticleName() 113 << " " << particle->GetParticleName()
107 << " CurLimit(mm)= " << tlimit/mm <<" safet 114 << " CurLimit(mm)= " << tlimit/mm <<" safety(mm)= " << presafety/mm
108 << " R(mm)= " <<currentRange/mm 115 << " R(mm)= " <<currentRange/mm
109 << " L0(mm^-1)= " << lambdaeff*mm 116 << " L0(mm^-1)= " << lambdaeff*mm
110 <<G4endl; 117 <<G4endl;
111 */ 118 */
112 // natural limit for high energy 119 // natural limit for high energy
113 G4double rlimit = std::max(facrange*currentR 120 G4double rlimit = std::max(facrange*currentRange, lambdaeff);
114 121
115 // low-energy e- 122 // low-energy e-
116 rlimit = std::max(rlimit, facsafety*presafet 123 rlimit = std::max(rlimit, facsafety*presafety);
117 124
118 tlimit = std::min(tlimit, rlimit); 125 tlimit = std::min(tlimit, rlimit);
119 tlimit = std::max(tlimit, tlimitminfix); 126 tlimit = std::max(tlimit, tlimitminfix);
120 127
121 // step limit in infinite media 128 // step limit in infinite media
122 tlimit = std::min(tlimit, 50*currentMaterial 129 tlimit = std::min(tlimit, 50*currentMaterial->GetRadlen()/facgeom);
123 130
124 //compute geomlimit and force few steps with 131 //compute geomlimit and force few steps within a volume
125 if (steppingAlgorithm == fUseDistanceToBound 132 if (steppingAlgorithm == fUseDistanceToBoundary
126 && stepStatus == fGeomBoundary) { 133 && stepStatus == fGeomBoundary) {
127 134
128 G4double geomlimit = ComputeGeomLimit(trac 135 G4double geomlimit = ComputeGeomLimit(track, presafety, currentRange);
129 tlimit = std::min(tlimit, geomlimit/facgeo 136 tlimit = std::min(tlimit, geomlimit/facgeom);
130 } 137 }
131 /* 138 /*
132 G4cout << particle->GetParticleName() << " E 139 G4cout << particle->GetParticleName() << " E(MeV)= " << preKinEnergy
133 << " L0= " << lambdaeff << " R= " << curren 140 << " L0= " << lambdaeff << " R= " << currentRange
134 << " tlimit= " << tlimit 141 << " tlimit= " << tlimit
135 << " currentMinimalStep= " << currentMini 142 << " currentMinimalStep= " << currentMinimalStep << G4endl;
136 */ 143 */
137 return ConvertTrueToGeom(tlimit, currentMini 144 return ConvertTrueToGeom(tlimit, currentMinimalStep);
138 } 145 }
139 146
140 //....oooOO0OOooo........oooOO0OOooo........oo 147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
141 148