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>> 26 // $Id: G4LowEWentzelVIModel.cc 74528 2013-10-12 17:24:24Z vnivanch $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4LowEWentzelVIModel 33 // File name: G4LowEWentzelVIModel
33 // 34 //
34 // Author: V.Ivanchenko 35 // Author: V.Ivanchenko
35 // 36 //
36 // Creation date: 11.02.2014 from G4WentzelVIM 37 // Creation date: 11.02.2014 from G4WentzelVIModel
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // Class Description: 41 // Class Description:
41 // 42 //
42 43
43 // ------------------------------------------- 44 // -------------------------------------------------------------------
44 // 45 //
45 46
46 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
48 49
49 #include "G4LowEWentzelVIModel.hh" 50 #include "G4LowEWentzelVIModel.hh"
50 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh" 52 #include "G4SystemOfUnits.hh"
52 53
53 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 55
>> 56 using namespace std;
>> 57
55 G4LowEWentzelVIModel::G4LowEWentzelVIModel() : 58 G4LowEWentzelVIModel::G4LowEWentzelVIModel() :
56 G4WentzelVIModel(true, "LowEnWentzelVI") << 59 G4WentzelVIModel(false,"LowEnWentzelVI")
57 { 60 {
58 SetSingleScatteringFactor(0.5); 61 SetSingleScatteringFactor(0.5);
59 } 62 }
60 63
61 //....oooOO0OOooo........oooOO0OOooo........oo 64 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
62 65
>> 66 G4LowEWentzelVIModel::~G4LowEWentzelVIModel()
>> 67 {}
>> 68
>> 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 70
63 G4double G4LowEWentzelVIModel::ComputeTruePath 71 G4double G4LowEWentzelVIModel::ComputeTruePathLengthLimit(
64 const G4Track& tr 72 const G4Track& track,
65 G4double& currentMinimalStep) 73 G4double& currentMinimalStep)
66 { 74 {
67 G4double tlimit = currentMinimalStep; 75 G4double tlimit = currentMinimalStep;
68 const G4DynamicParticle* dp = track.GetDynam 76 const G4DynamicParticle* dp = track.GetDynamicParticle();
69 G4StepPoint* sp = track.GetStep()->GetPreSte 77 G4StepPoint* sp = track.GetStep()->GetPreStepPoint();
70 G4StepStatus stepStatus = sp->GetStepStatus( 78 G4StepStatus stepStatus = sp->GetStepStatus();
71 singleScatteringMode = false; 79 singleScatteringMode = false;
>> 80 //G4cout << "G4LowEWentzelVIModel::ComputeTruePathLengthLimit stepStatus= "
>> 81 // << stepStatus << " " << track.GetDefinition()->GetParticleName()
>> 82 // << G4endl;
72 83
73 // initialisation for each step, lambda may 84 // initialisation for each step, lambda may be computed from scratch
74 preKinEnergy = dp->GetKineticEnergy(); 85 preKinEnergy = dp->GetKineticEnergy();
75 DefineMaterial(track.GetMaterialCutsCouple() 86 DefineMaterial(track.GetMaterialCutsCouple());
76 lambdaeff = GetTransportMeanFreePath(particl 87 lambdaeff = GetTransportMeanFreePath(particle,preKinEnergy);
77 currentRange = GetRange(particle,preKinEnerg 88 currentRange = GetRange(particle,preKinEnergy,currentCouple);
78 cosTetMaxNuc = wokvi->SetupKinematic(preKinE 89 cosTetMaxNuc = wokvi->SetupKinematic(preKinEnergy, currentMaterial);
79 << 90 /*
>> 91 G4cout << "lambdaeff= " << lambdaeff << " Range= " << currentRange
>> 92 << " tlimit= " << tlimit << " 1-cost= " << 1 - cosTetMaxNuc << G4endl;
>> 93 */
80 // extra check for abnormal situation 94 // extra check for abnormal situation
81 // this check needed to run MSC with eIoni a 95 // this check needed to run MSC with eIoni and eBrem inactivated
82 tlimit = std::min(tlimit, currentRange); 96 tlimit = std::min(tlimit, currentRange);
83 97
84 // stop here if small range particle 98 // stop here if small range particle
85 if(tlimit < tlimitminfix) { 99 if(tlimit < tlimitminfix) {
86 return ConvertTrueToGeom(tlimit, currentMi 100 return ConvertTrueToGeom(tlimit, currentMinimalStep);
87 } 101 }
88 102
89 // pre step 103 // pre step
90 G4double presafety = sp->GetSafety(); 104 G4double presafety = sp->GetSafety();
91 // far from geometry boundary 105 // far from geometry boundary
92 if(currentRange < presafety) { 106 if(currentRange < presafety) {
93 return ConvertTrueToGeom(tlimit, currentMi 107 return ConvertTrueToGeom(tlimit, currentMinimalStep);
94 } 108 }
95 109
96 // compute presafety again if presafety <= 0 110 // compute presafety again if presafety <= 0 and no boundary
97 // i.e. when it is needed for optimization p 111 // i.e. when it is needed for optimization purposes
98 if(stepStatus != fGeomBoundary && presafety 112 if(stepStatus != fGeomBoundary && presafety < tlimitminfix) {
99 presafety = ComputeSafety(sp->GetPosition( 113 presafety = ComputeSafety(sp->GetPosition(), tlimit);
100 if(currentRange < presafety) { 114 if(currentRange < presafety) {
101 return ConvertTrueToGeom(tlimit, current 115 return ConvertTrueToGeom(tlimit, currentMinimalStep);
102 } 116 }
103 } 117 }
104 /* 118 /*
105 G4cout << "e(MeV)= " << preKinEnergy/MeV 119 G4cout << "e(MeV)= " << preKinEnergy/MeV
106 << " " << particle->GetParticleName() 120 << " " << particle->GetParticleName()
107 << " CurLimit(mm)= " << tlimit/mm <<" safet 121 << " CurLimit(mm)= " << tlimit/mm <<" safety(mm)= " << presafety/mm
108 << " R(mm)= " <<currentRange/mm 122 << " R(mm)= " <<currentRange/mm
109 << " L0(mm^-1)= " << lambdaeff*mm 123 << " L0(mm^-1)= " << lambdaeff*mm
110 <<G4endl; 124 <<G4endl;
111 */ 125 */
112 // natural limit for high energy 126 // natural limit for high energy
113 G4double rlimit = std::max(facrange*currentR 127 G4double rlimit = std::max(facrange*currentRange, lambdaeff);
>> 128 //G4double rlimit = std::max(facrange*currentRange,
>> 129 // 0.7*(1.0 - cosTetMaxNuc)*lambdaeff);
114 130
115 // low-energy e- 131 // low-energy e-
116 rlimit = std::max(rlimit, facsafety*presafet 132 rlimit = std::max(rlimit, facsafety*presafety);
117 << 133
>> 134 // cut correction
>> 135 //G4double rcut = currentCouple->GetProductionCuts()->GetProductionCut(1);
>> 136 //G4cout << "rcut= " << rcut << " rlimit= " << rlimit << " presafety= "
>> 137 // << presafety << " 1-cosThetaMax= " <<1-cosThetaMax
>> 138 //<< " 1-cosTetMaxNuc= " << 1-cosTetMaxNuc << G4endl;
>> 139 //if(rcut > rlimit) { rlimit = std::min(rlimit, rcut*sqrt(rlimit/rcut)); }
>> 140
118 tlimit = std::min(tlimit, rlimit); 141 tlimit = std::min(tlimit, rlimit);
119 tlimit = std::max(tlimit, tlimitminfix); 142 tlimit = std::max(tlimit, tlimitminfix);
120 143
121 // step limit in infinite media 144 // step limit in infinite media
122 tlimit = std::min(tlimit, 50*currentMaterial 145 tlimit = std::min(tlimit, 50*currentMaterial->GetRadlen()/facgeom);
123 146
124 //compute geomlimit and force few steps with 147 //compute geomlimit and force few steps within a volume
125 if (steppingAlgorithm == fUseDistanceToBound 148 if (steppingAlgorithm == fUseDistanceToBoundary
126 && stepStatus == fGeomBoundary) { 149 && stepStatus == fGeomBoundary) {
127 150
128 G4double geomlimit = ComputeGeomLimit(trac 151 G4double geomlimit = ComputeGeomLimit(track, presafety, currentRange);
129 tlimit = std::min(tlimit, geomlimit/facgeo 152 tlimit = std::min(tlimit, geomlimit/facgeom);
130 } 153 }
131 /* 154 /*
132 G4cout << particle->GetParticleName() << " E 155 G4cout << particle->GetParticleName() << " E(MeV)= " << preKinEnergy
133 << " L0= " << lambdaeff << " R= " << curren 156 << " L0= " << lambdaeff << " R= " << currentRange
134 << " tlimit= " << tlimit 157 << " tlimit= " << tlimit
135 << " currentMinimalStep= " << currentMini 158 << " currentMinimalStep= " << currentMinimalStep << G4endl;
136 */ 159 */
137 return ConvertTrueToGeom(tlimit, currentMini 160 return ConvertTrueToGeom(tlimit, currentMinimalStep);
138 } 161 }
139 162
140 //....oooOO0OOooo........oooOO0OOooo........oo 163 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
141 164