| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 << 26 // $Id: G4AdjointAlongStepWeightCorrection.cc 66892 2013-01-17 10:57:59Z gunter $
>> 27 //
27 #include "G4AdjointAlongStepWeightCorrection.h 28 #include "G4AdjointAlongStepWeightCorrection.hh"
28 <<
29 #include "G4AdjointCSManager.hh" <<
30 #include "G4ParticleChange.hh" <<
31 #include "G4ParticleDefinition.hh" <<
32 #include "G4Step.hh" 29 #include "G4Step.hh"
>> 30 #include "G4ParticleDefinition.hh"
33 #include "G4VParticleChange.hh" 31 #include "G4VParticleChange.hh"
>> 32 #include "G4AdjointCSManager.hh"
34 33
35 ////////////////////////////////////////////// 34 ///////////////////////////////////////////////////////
36 G4AdjointAlongStepWeightCorrection::G4AdjointA << 35 //
37 const G4String& name, G4ProcessType type) << 36
38 : G4VContinuousProcess(name, type) << 37 G4AdjointAlongStepWeightCorrection::G4AdjointAlongStepWeightCorrection(const G4String& name,
39 { << 38 G4ProcessType type): G4VContinuousProcess(name, type)
40 fParticleChange = new G4ParticleChange(); << 39 {fParticleChange = new G4ParticleChange();
41 fCSManager = G4AdjointCSManager::GetAdj << 40 currentMaterialIndex=0;
>> 41 preStepKinEnergy=1.;
>> 42 currentCouple=0;
42 } 43 }
43 44
44 ////////////////////////////////////////////// 45 ///////////////////////////////////////////////////////
>> 46 //
>> 47
45 G4AdjointAlongStepWeightCorrection::~G4Adjoint 48 G4AdjointAlongStepWeightCorrection::~G4AdjointAlongStepWeightCorrection()
46 { << 49 {delete fParticleChange;
47 delete fParticleChange; <<
48 } 50 }
49 <<
50 ////////////////////////////////////////////// 51 ///////////////////////////////////////////////////////
51 void G4AdjointAlongStepWeightCorrection::Proce << 52 //
52 std::ostream& out) const << 53 void G4AdjointAlongStepWeightCorrection::PreparePhysicsTable(
>> 54 const G4ParticleDefinition& )
53 { 55 {
54 out << << 56 ;
55 "Continuous processes act on adjoint particl <<
56 "weight during the adjoint reverse tracking. <<
57 "the adjoint cross sections are not scaled s <<
58 "section matches the total forward cross sec <<
59 "the total adjoint cross section is equal to <<
60 "is used and therefore this along step weigh <<
61 "in some cases (some energy ranges) the tota <<
62 "total adjoint cross section can be zero. In <<
63 "correction is needed and is given by exp(-( <<
64 "\n"; <<
65 } 57 }
>> 58 ///////////////////////////////////////////////////////
>> 59 //
66 60
>> 61 void G4AdjointAlongStepWeightCorrection::BuildPhysicsTable(const G4ParticleDefinition& )
>> 62 {;
>> 63 }
67 ////////////////////////////////////////////// 64 ///////////////////////////////////////////////////////
68 G4VParticleChange* G4AdjointAlongStepWeightCor << 65 //
69 const G4Track& track, const G4Step& step) << 66 G4VParticleChange* G4AdjointAlongStepWeightCorrection::AlongStepDoIt(const G4Track& track,
>> 67 const G4Step& step)
70 { 68 {
>> 69
71 fParticleChange->Initialize(track); 70 fParticleChange->Initialize(track);
72 << 71
73 // Get the actual (true) Step length 72 // Get the actual (true) Step length
>> 73 //----------------------------------
74 G4double length = step.GetStepLength(); 74 G4double length = step.GetStepLength();
>> 75
75 76
76 G4double Tkin = step.GetPostStepPoint()->Get 77 G4double Tkin = step.GetPostStepPoint()->GetKineticEnergy();
77 G4ParticleDefinition* thePartDef = const_cas << 78 G4ParticleDefinition* thePartDef= const_cast<G4ParticleDefinition*> (track.GetDynamicParticle()->GetDefinition());
78 track.GetDynamicParticle()->GetDefinition( << 79 G4double weight_correction=G4AdjointCSManager::GetAdjointCSManager()->GetContinuousWeightCorrection(thePartDef,
79 G4double weight_correction = fCSManager->Get << 80 preStepKinEnergy,Tkin, currentCouple,length);
80 thePartDef, fPreStepKinEnergy, Tkin, fCurr << 81
81 << 82
82 // Caution!!! << 83
83 // It is important to select the weight of t << 84
84 // weight and not the weight of the track, a << 85 //Caution!!!
85 // changed after having applied all the alon << 86 // It is important to select the weight of the post_step_point
86 G4double new_weight = << 87 // as the current weight and not the weight of the track, as t
87 weight_correction * step.GetPostStepPoint( << 88 // the weight of the track is changed after having applied all
88 << 89 // the along_step_do_it.
89 // The following test check for zero weight. << 90
90 // This happens after weight correction of g << 91 // G4double new_weight=weight_correction*track.GetWeight(); //old
91 // When the new weight is 0 it will be later << 92 G4double new_weight=weight_correction*step.GetPostStepPoint()->GetWeight();
92 // Therefore we put a lower limit of 1.e-300 << 93
93 if(new_weight == 0. || (new_weight <= 0. && <<
94 { <<
95 new_weight = 1.e-300; <<
96 } <<
97 94
>> 95
>> 96 //if (weight_correction >2.) new_weight=1.e-300;
>> 97
>> 98
>> 99 //The following test check for zero weight.
>> 100 //This happens after weight correction of gamma for photo electric effect.
>> 101 //When the new weight is 0 it will be later on consider as nan by G4.
>> 102 //Therefore we do put a lower limit of 1.e-300. for new_weight
>> 103 //Correction by L.Desorgher on 15 July 2009
>> 104 if (new_weight==0 || (new_weight<=0 && new_weight>0)){
>> 105 //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
>> 106 new_weight=1.e-300;
>> 107 }
>> 108
>> 109 //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
98 fParticleChange->SetParentWeightByProcess(fa 110 fParticleChange->SetParentWeightByProcess(false);
99 fParticleChange->SetSecondaryWeightByProcess 111 fParticleChange->SetSecondaryWeightByProcess(false);
100 fParticleChange->ProposeParentWeight(new_wei 112 fParticleChange->ProposeParentWeight(new_weight);
>> 113
101 114
102 return fParticleChange; 115 return fParticleChange;
103 } <<
104 116
>> 117 }
105 ////////////////////////////////////////////// 118 ///////////////////////////////////////////////////////
106 G4double G4AdjointAlongStepWeightCorrection::G << 119 //
107 const G4Track& track, G4double, G4double, G4 << 120 G4double G4AdjointAlongStepWeightCorrection::GetContinuousStepLimit(const G4Track& track,
108 { << 121 G4double , G4double , G4double& )
>> 122 {
>> 123 G4double x = DBL_MAX;
109 DefineMaterial(track.GetMaterialCutsCouple() 124 DefineMaterial(track.GetMaterialCutsCouple());
110 fPreStepKinEnergy = track.GetKineticEnergy() << 125 preStepKinEnergy = track.GetKineticEnergy();
111 return DBL_MAX; << 126 return x;
112 } 127 }
113 128