[807] | 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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| 26 | // |
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| 27 | // $Id: ExN05PiModel.cc,v 1.7 2006/06/29 17:53:34 gunter Exp $ |
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| 28 | // GEANT4 tag $Name: $ |
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| 29 | // |
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| 30 | #include "ExN05PiModel.hh" |
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| 31 | |
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| 32 | #include "G4PionMinus.hh" |
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| 33 | #include "G4PionPlus.hh" |
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| 34 | #include "G4Gamma.hh" |
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| 35 | |
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| 36 | ExN05PiModel::ExN05PiModel(G4Region *anEnvelope) : |
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| 37 | G4VFastSimulationModel("ExN05PiModel",anEnvelope) |
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| 38 | {;} |
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| 39 | |
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| 40 | ExN05PiModel::~ExN05PiModel() |
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| 41 | {;} |
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| 42 | |
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| 43 | G4bool ExN05PiModel::IsApplicable(const G4ParticleDefinition& particleType) |
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| 44 | { |
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| 45 | return |
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| 46 | &particleType == G4PionMinus::PionMinusDefinition() || |
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| 47 | &particleType == G4PionPlus::PionPlusDefinition(); |
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| 48 | } |
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| 49 | |
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| 50 | G4bool ExN05PiModel::ModelTrigger(const G4FastTrack& fastTrack) { |
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| 51 | //------------------------------------------------------------- |
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| 52 | // UserTrigger() method: method which has to decide if |
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| 53 | // the parameterisation has to be applied. |
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| 54 | // Here ModelTrigger() asks the user (ie you) a 0/1 answer. |
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| 55 | // |
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| 56 | // Note that quantities like the local/global position/direction etc.. |
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| 57 | // are available at this level via the fastTrack parameter (allowing |
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| 58 | // to check distance from boundaries, see below to allow the decision) |
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| 59 | //-------------------------------------------------------------- |
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| 60 | G4cout << "\nExN05PiModel::ModelTrigger() called:" << G4endl; |
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| 61 | G4cout << "--------------------------------" << G4endl; |
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| 62 | G4cout << "(particle is a " << fastTrack.GetPrimaryTrack()-> |
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| 63 | GetDefinition()->GetParticleName() << " )\n" << G4endl; |
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| 64 | |
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| 65 | // -- Examples of available informations: |
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| 66 | |
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| 67 | // -- position: |
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| 68 | G4cout << " Track position: " << |
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| 69 | fastTrack.GetPrimaryTrack()->GetPosition() << "(global coord.)" << |
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| 70 | fastTrack.GetPrimaryTrackLocalPosition() << "(in envelope coord.)" |
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| 71 | << G4endl; |
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| 72 | |
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| 73 | // -- direction: |
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| 74 | G4cout << " Track direction:" << |
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| 75 | fastTrack.GetPrimaryTrack()->GetMomentum().unit() << |
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| 76 | "(global coord.)" << |
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| 77 | fastTrack.GetPrimaryTrackLocalDirection() << "(in envelope coord.)" << |
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| 78 | G4endl; |
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| 79 | |
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| 80 | return true; |
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| 81 | } |
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| 82 | |
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| 83 | void ExN05PiModel::DoIt(const G4FastTrack& fastTrack, |
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| 84 | G4FastStep& fastStep) |
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| 85 | //-------------------------------------------------- |
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| 86 | // |
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| 87 | // User method to code the parameterisation properly |
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| 88 | // said. |
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| 89 | // |
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| 90 | //-------------------------------------------------- |
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| 91 | { |
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| 92 | |
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| 93 | //------------------------------------------------ |
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| 94 | // The primary track continues along its direction. |
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| 95 | // One secondary (a photon) is added: |
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| 96 | //------------------------------------------------ |
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| 97 | G4cout << " Pion `model' applied\n" << G4endl; |
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| 98 | |
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| 99 | //------------------------------ |
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| 100 | // Primary: |
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| 101 | // idem as in "DefaultModel": |
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| 102 | // |
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| 103 | //------------------------------ |
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| 104 | G4ThreeVector position; |
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| 105 | G4double distance; |
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| 106 | distance = fastTrack.GetEnvelopeSolid()-> |
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| 107 | DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(), |
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| 108 | fastTrack.GetPrimaryTrackLocalDirection()); |
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| 109 | position = fastTrack.GetPrimaryTrackLocalPosition() + |
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| 110 | distance*fastTrack.GetPrimaryTrackLocalDirection(); |
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| 111 | |
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| 112 | // -- set final position: |
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| 113 | fastStep.ProposePrimaryTrackFinalPosition(position); |
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| 114 | |
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| 115 | //--------------------------- |
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| 116 | // Secondary: |
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| 117 | // Adds one "secondary": |
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| 118 | // |
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| 119 | //--------------------------- |
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| 120 | // -- First, user has to say how many secondaries will be created: |
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| 121 | fastStep.SetNumberOfSecondaryTracks(1); |
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| 122 | |
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| 123 | //------------------------ |
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| 124 | // -- Build the secondary: |
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| 125 | //------------------------ |
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| 126 | // -- direction: |
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| 127 | G4ParticleMomentum direction(fastTrack.GetPrimaryTrackLocalDirection()); |
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| 128 | direction.setZ(direction.z()*0.5); |
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| 129 | direction.setY(direction.y()+direction.z()*0.1); |
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| 130 | direction = direction.unit(); // necessary ? |
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| 131 | |
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| 132 | // -- dynamics (Note that many constructors exists for G4DynamicParticle |
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| 133 | // -- see prototype/particle+matter/particles/management/include/G4DynamicParticle.hh) |
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| 134 | G4DynamicParticle dynamique(G4Gamma::GammaDefinition(), |
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| 135 | direction, |
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| 136 | fastTrack.GetPrimaryTrack()-> |
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| 137 | GetKineticEnergy()/2.); |
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| 138 | // -- position: |
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| 139 | G4double Dist; |
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| 140 | Dist = fastTrack.GetEnvelopeSolid()-> |
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| 141 | DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(), |
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| 142 | direction); |
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| 143 | G4ThreeVector posi; |
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| 144 | posi = fastTrack.GetPrimaryTrackLocalPosition() + Dist*direction; |
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| 145 | |
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| 146 | //------------------------------------ |
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| 147 | //-- Creation of the secondary Track: |
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| 148 | //------------------------------------ |
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| 149 | fastStep.CreateSecondaryTrack(dynamique, posi, |
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| 150 | fastTrack.GetPrimaryTrack()->GetGlobalTime()); |
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| 151 | |
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| 152 | } |
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