[966] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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[1196] | 26 | // $Id: G4AdjointAlongStepWeightCorrection.hh,v 1.4 2009/11/20 10:31:20 ldesorgh Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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| 28 | // |
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[966] | 29 | ///////////////////////////////////////////////////////////////////////////////// |
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[1196] | 30 | // Class: G4AdjointAlongStepWeightCorrection |
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[966] | 31 | // Author: L. Desorgher |
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| 32 | // Organisation: SpaceIT GmbH |
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[1196] | 33 | // Contract: ESA contract 21435/08/NL/AT |
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[966] | 34 | // Customer: ESA/ESTEC |
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| 35 | ///////////////////////////////////////////////////////////////////////////////// |
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| 36 | // |
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| 37 | // CHANGE HISTORY |
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| 38 | // -------------- |
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| 39 | // ChangeHistory: |
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[1196] | 40 | // 10 May 2007 creation by L. Desorgher |
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| 41 | // October 2009 implementation of the mode where the total adjoint and forward cross sections are equivalent. L. Desorgher |
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[966] | 42 | // |
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| 43 | //------------------------------------------------------------- |
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| 44 | // Documentation: |
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| 45 | // Continuous processes acting on adjoint particles to correct continuously their weight during the adjoint reverse tracking. |
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[1196] | 46 | // Thi process is needed whene the adjoint cross section are not scaled such that the total adjoint cross section match the total forward cross section. |
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| 47 | // By default the mode where the total adjoint cross section is equal to the total forward cross section is used an therefore this along step weight |
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| 48 | // correction factor is 1. |
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| 49 | // However in some cases (some energy ranges) the total forward cross section or the total adjoint cross section can be null, in this case the along step |
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| 50 | // weight correction is neede and is given by exp(-(Sigma_tot_adj-Sigma_tot_fwd).dx) |
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| 51 | // |
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| 52 | // |
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[966] | 53 | // |
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| 54 | |
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| 55 | |
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| 56 | #ifndef G4AdjointAlongStepWeightCorrection_h |
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| 57 | #define G4AdjointAlongStepWeightCorrection_h 1 |
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| 58 | |
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| 59 | #include "G4VContinuousProcess.hh" |
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| 60 | #include "globals.hh" |
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| 61 | #include "G4Material.hh" |
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| 62 | #include "G4MaterialCutsCouple.hh" |
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| 63 | #include "G4Track.hh" |
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| 64 | #include "G4ParticleChange.hh" |
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| 65 | |
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| 66 | class G4Step; |
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| 67 | class G4ParticleDefinition; |
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| 68 | |
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| 69 | |
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| 70 | |
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| 71 | class G4AdjointAlongStepWeightCorrection : public G4VContinuousProcess |
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| 72 | { |
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| 73 | public: |
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| 74 | |
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| 75 | G4AdjointAlongStepWeightCorrection(const G4String& name = "ContinuousWeightCorrection", |
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| 76 | G4ProcessType type = fElectromagnetic); |
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| 77 | |
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| 78 | virtual ~G4AdjointAlongStepWeightCorrection(); |
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| 79 | |
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| 80 | |
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| 81 | protected: |
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| 82 | virtual G4double GetContinuousStepLimit(const G4Track& track, |
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| 83 | G4double previousStepSize, |
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| 84 | G4double currentMinimumStep, |
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| 85 | G4double& currentSafety); |
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| 86 | |
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| 87 | |
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| 88 | //------------------------------------------------------------------------ |
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| 89 | // Generic methods common to all processes |
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| 90 | //------------------------------------------------------------------------ |
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| 91 | public: |
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| 92 | |
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| 93 | void PreparePhysicsTable(const G4ParticleDefinition&); |
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| 94 | |
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| 95 | void BuildPhysicsTable(const G4ParticleDefinition&); |
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| 96 | |
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| 97 | G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&); |
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| 98 | |
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| 99 | |
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| 100 | private: |
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| 101 | |
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| 102 | void DefineMaterial(const G4MaterialCutsCouple* couple); |
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| 103 | |
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| 104 | |
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| 105 | |
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| 106 | G4AdjointAlongStepWeightCorrection(G4AdjointAlongStepWeightCorrection &); |
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| 107 | G4AdjointAlongStepWeightCorrection & operator=(const G4AdjointAlongStepWeightCorrection &right); |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | protected: |
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| 112 | |
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| 113 | G4ParticleChange* fParticleChange; |
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| 114 | |
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| 115 | |
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| 116 | private: |
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| 117 | |
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| 118 | const G4Material* currentMaterial; |
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| 119 | const G4MaterialCutsCouple* currentCouple; |
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| 120 | size_t currentMaterialIndex; |
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| 121 | G4double currentTcut; |
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| 122 | G4double preStepKinEnergy; |
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| 123 | |
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| 124 | }; |
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| 125 | |
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| 126 | inline void G4AdjointAlongStepWeightCorrection::DefineMaterial( |
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| 127 | const G4MaterialCutsCouple* couple) |
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| 128 | { |
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| 129 | if(couple != currentCouple) { |
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| 130 | currentCouple = couple; |
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| 131 | currentMaterial = couple->GetMaterial(); |
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| 132 | currentMaterialIndex = couple->GetIndex(); |
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[1196] | 133 | |
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[966] | 134 | } |
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| 135 | } |
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| 136 | |
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| 137 | |
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[1196] | 138 | |
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[966] | 139 | #endif |
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