ECCE @ EIC Software
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
G4AdjointAlongStepWeightCorrection.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file G4AdjointAlongStepWeightCorrection.cc
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 #include "G4AdjointAlongStepWeightCorrection.hh"
28 #include "G4Step.hh"
29 #include "G4ParticleDefinition.hh"
30 #include "G4VParticleChange.hh"
31 #include "G4AdjointCSManager.hh"
32 
34 //
35 
36 G4AdjointAlongStepWeightCorrection::G4AdjointAlongStepWeightCorrection(const G4String& name,
37  G4ProcessType type): G4VContinuousProcess(name, type)
38 {fParticleChange = new G4ParticleChange();
39  currentMaterialIndex=0;
40  preStepKinEnergy=1.;
41  currentCouple=0;
42 }
43 
45 //
46 
47 G4AdjointAlongStepWeightCorrection::~G4AdjointAlongStepWeightCorrection()
48 {delete fParticleChange;
49 }
51 //
52 void G4AdjointAlongStepWeightCorrection::PreparePhysicsTable(
53  const G4ParticleDefinition& )
54 {
55 ;
56 }
58 //
59 
60 void G4AdjointAlongStepWeightCorrection::BuildPhysicsTable(const G4ParticleDefinition& )
61 {;
62 }
64 //
65 G4VParticleChange* G4AdjointAlongStepWeightCorrection::AlongStepDoIt(const G4Track& track,
66  const G4Step& step)
67 {
68 
69  fParticleChange->Initialize(track);
70 
71  // Get the actual (true) Step length
72  //----------------------------------
73  G4double length = step.GetStepLength();
74 
75 
76  G4double Tkin = step.GetPostStepPoint()->GetKineticEnergy();
77  G4ParticleDefinition* thePartDef= const_cast<G4ParticleDefinition*> (track.GetDynamicParticle()->GetDefinition());
78  G4double weight_correction=G4AdjointCSManager::GetAdjointCSManager()->GetContinuousWeightCorrection(thePartDef,
79  preStepKinEnergy,Tkin, currentCouple,length);
80 
81 
82 
83 
84  //Caution!!!
85  // It is important to select the weight of the post_step_point
86  // as the current weight and not the weight of the track, as t
87  // the weight of the track is changed after having applied all
88  // the along_step_do_it.
89 
90  // G4double new_weight=weight_correction*track.GetWeight(); //old
91  G4double new_weight=weight_correction*step.GetPostStepPoint()->GetWeight();
92 
93 
94 
95  //if (weight_correction >2.) new_weight=1.e-300;
96 
97 
98  //The following test check for zero weight.
99  //This happens after weight correction of gamma for photo electric effect.
100  //When the new weight is 0 it will be later on consider as nan by G4.
101  //Therefore we do put a lower limit of 1.e-300. for new_weight
102  //Correction by L.Desorgher on 15 July 2009
103  if (new_weight==0 || (new_weight<=0 && new_weight>0)){
104  //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
105  new_weight=1.e-300;
106  }
107 
108  //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
109  fParticleChange->SetParentWeightByProcess(false);
110  fParticleChange->SetSecondaryWeightByProcess(false);
111  fParticleChange->ProposeParentWeight(new_weight);
112 
113 
114  return fParticleChange;
115 
116 }
118 //
119 G4double G4AdjointAlongStepWeightCorrection::GetContinuousStepLimit(const G4Track& track,
120  G4double , G4double , G4double& )
121 {
122  G4double x = DBL_MAX;
123  DefineMaterial(track.GetMaterialCutsCouple());
124  preStepKinEnergy = track.GetKineticEnergy();
125  return x;
126 }