[968] | 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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[1340] | 26 | // $Id: G4IonParametrisedLossModel.cc,v 1.10 2010/11/04 12:21:48 vnivanch Exp $ |
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[1347] | 27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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[968] | 28 | // |
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| 29 | // =========================================================================== |
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| 30 | // GEANT4 class source file |
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| 31 | // |
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| 32 | // Class: G4IonParametrisedLossModel |
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| 33 | // |
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| 34 | // Base class: G4VEmModel (utils) |
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| 35 | // |
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| 36 | // Author: Anton Lechner (Anton.Lechner@cern.ch) |
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| 37 | // |
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| 38 | // First implementation: 10. 11. 2008 |
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| 39 | // |
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[1055] | 40 | // Modifications: 03. 02. 2009 - Bug fix iterators (AL) |
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[1192] | 41 | // 11. 03. 2009 - Introduced new table handler(G4IonDEDXHandler) |
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[1055] | 42 | // and modified method to add/remove tables |
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[1192] | 43 | // (tables are now built in init. phase), |
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[1055] | 44 | // Minor bug fix in ComputeDEDXPerVolume (AL) |
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| 45 | // 11. 05. 2009 - Introduced scaling algorithm for heavier ions: |
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| 46 | // G4IonDEDXScalingICRU73 (AL) |
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[1192] | 47 | // 12. 11. 2009 - Moved from original ICRU 73 classes to new |
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| 48 | // class (G4IonStoppingData), which is capable |
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| 49 | // of reading stopping power data files stored |
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| 50 | // in G4LEDATA (requires G4EMLOW6.8 or higher). |
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| 51 | // Simultanesouly, the upper energy limit of |
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| 52 | // ICRU 73 is increased to 1 GeV/nucleon. |
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| 53 | // - Removed nuclear stopping from Corrections- |
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| 54 | // AlongStep since dedicated process was created. |
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| 55 | // - Added function for switching off scaling |
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| 56 | // of heavy ions from ICRU 73 data |
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| 57 | // - Minor fix in ComputeLossForStep function |
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| 58 | // - Minor fix in ComputeDEDXPerVolume (AL) |
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[1228] | 59 | // 23. 11. 2009 - Changed energy loss limit from 0.15 to 0.01 |
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| 60 | // to improve accuracy for large steps (AL) |
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| 61 | // 24. 11. 2009 - Bug fix: Range calculation corrected if same |
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| 62 | // materials appears with different cuts in diff. |
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| 63 | // regions (added UpdateRangeCache function and |
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| 64 | // modified BuildRangeVector, ComputeLossForStep |
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| 65 | // functions accordingly, added new cache param.) |
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| 66 | // - Removed GetRange function (AL) |
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[1340] | 67 | // 04. 11. 2010 - Moved virtual methods to the source (VI) |
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[968] | 68 | // |
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[1192] | 69 | // |
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[968] | 70 | // Class description: |
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| 71 | // Model for computing the energy loss of ions by employing a |
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| 72 | // parameterisation of dE/dx tables (by default ICRU 73 tables). For |
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| 73 | // ion-material combinations and/or projectile energies not covered |
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| 74 | // by this model, the G4BraggIonModel and G4BetheBloch models are |
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| 75 | // employed. |
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| 76 | // |
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| 77 | // Comments: |
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| 78 | // |
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| 79 | // =========================================================================== |
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| 80 | |
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| 81 | |
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| 82 | #include "G4IonParametrisedLossModel.hh" |
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[1192] | 83 | #include "G4LPhysicsFreeVector.hh" |
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| 84 | #include "G4IonStoppingData.hh" |
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[1055] | 85 | #include "G4VIonDEDXTable.hh" |
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| 86 | #include "G4VIonDEDXScalingAlgorithm.hh" |
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| 87 | #include "G4IonDEDXScalingICRU73.hh" |
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[968] | 88 | #include "G4BraggIonModel.hh" |
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| 89 | #include "G4BetheBlochModel.hh" |
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[1055] | 90 | #include "G4ProductionCutsTable.hh" |
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[968] | 91 | #include "G4ParticleChangeForLoss.hh" |
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| 92 | #include "G4LossTableManager.hh" |
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| 93 | #include "G4GenericIon.hh" |
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| 94 | #include "G4Electron.hh" |
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| 95 | #include "Randomize.hh" |
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| 96 | |
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[1055] | 97 | //#define PRINT_TABLE_BUILT |
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[968] | 98 | |
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[1055] | 99 | |
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| 100 | // ######################################################################### |
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| 101 | |
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[968] | 102 | G4IonParametrisedLossModel::G4IonParametrisedLossModel( |
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| 103 | const G4ParticleDefinition*, |
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| 104 | const G4String& name) |
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| 105 | : G4VEmModel(name), |
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| 106 | braggIonModel(0), |
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| 107 | betheBlochModel(0), |
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| 108 | nmbBins(90), |
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| 109 | nmbSubBins(100), |
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| 110 | particleChangeLoss(0), |
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| 111 | corrFactor(1.0), |
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[1228] | 112 | energyLossLimit(0.01), |
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[1340] | 113 | cutEnergies(0) |
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| 114 | { |
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[968] | 115 | genericIon = G4GenericIon::Definition(); |
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| 116 | genericIonPDGMass = genericIon -> GetPDGMass(); |
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[1340] | 117 | corrections = G4LossTableManager::Instance() -> EmCorrections(); |
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[968] | 118 | |
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| 119 | // The upper limit of the current model is set to 100 TeV |
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| 120 | SetHighEnergyLimit(100.0 * TeV); |
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| 121 | |
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| 122 | // The Bragg ion and Bethe Bloch models are instantiated |
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| 123 | braggIonModel = new G4BraggIonModel(); |
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| 124 | betheBlochModel = new G4BetheBlochModel(); |
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| 125 | |
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[1055] | 126 | // By default ICRU 73 stopping power tables are loaded: |
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[1192] | 127 | AddDEDXTable("ICRU73", |
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| 128 | new G4IonStoppingData("ion_stopping_data/icru73"), |
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| 129 | new G4IonDEDXScalingICRU73()); |
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[968] | 130 | |
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| 131 | // The boundaries for the range tables are set |
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| 132 | lowerEnergyEdgeIntegr = 0.025 * MeV; |
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| 133 | upperEnergyEdgeIntegr = betheBlochModel -> HighEnergyLimit(); |
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| 134 | |
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[1228] | 135 | // Cache parameters are set |
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[968] | 136 | cacheParticle = 0; |
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| 137 | cacheMass = 0; |
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| 138 | cacheElecMassRatio = 0; |
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| 139 | cacheChargeSquare = 0; |
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| 140 | |
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[1228] | 141 | // Cache parameters are set |
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| 142 | rangeCacheParticle = 0; |
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| 143 | rangeCacheMatCutsCouple = 0; |
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| 144 | rangeCacheEnergyRange = 0; |
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| 145 | rangeCacheRangeEnergy = 0; |
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| 146 | |
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| 147 | // Cache parameters are set |
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[968] | 148 | dedxCacheParticle = 0; |
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| 149 | dedxCacheMaterial = 0; |
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| 150 | dedxCacheEnergyCut = 0; |
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[1055] | 151 | dedxCacheIter = lossTableList.end(); |
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[968] | 152 | dedxCacheTransitionEnergy = 0.0; |
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| 153 | dedxCacheTransitionFactor = 0.0; |
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| 154 | dedxCacheGenIonMassRatio = 0.0; |
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| 155 | } |
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| 156 | |
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[1055] | 157 | // ######################################################################### |
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[968] | 158 | |
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| 159 | G4IonParametrisedLossModel::~G4IonParametrisedLossModel() { |
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| 160 | |
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| 161 | // Range vs energy table objects are deleted and the container is cleared |
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| 162 | RangeEnergyTable::iterator iterRange = r.begin(); |
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| 163 | RangeEnergyTable::iterator iterRange_end = r.end(); |
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| 164 | |
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| 165 | for(;iterRange != iterRange_end; iterRange++) delete iterRange -> second; |
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| 166 | r.clear(); |
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| 167 | |
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| 168 | // Energy vs range table objects are deleted and the container is cleared |
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| 169 | EnergyRangeTable::iterator iterEnergy = E.begin(); |
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| 170 | EnergyRangeTable::iterator iterEnergy_end = E.end(); |
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| 171 | |
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| 172 | for(;iterEnergy != iterEnergy_end; iterEnergy++) delete iterEnergy -> second; |
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| 173 | E.clear(); |
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| 174 | |
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| 175 | // dE/dx table objects are deleted and the container is cleared |
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| 176 | LossTableList::iterator iterTables = lossTableList.begin(); |
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| 177 | LossTableList::iterator iterTables_end = lossTableList.end(); |
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| 178 | |
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| 179 | for(;iterTables != iterTables_end; iterTables++) delete *iterTables; |
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| 180 | lossTableList.clear(); |
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| 181 | |
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| 182 | // The Bragg ion and Bethe Bloch objects are deleted |
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| 183 | delete betheBlochModel; |
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| 184 | delete braggIonModel; |
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| 185 | } |
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| 186 | |
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[1055] | 187 | // ######################################################################### |
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[968] | 188 | |
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| 189 | G4double G4IonParametrisedLossModel::MinEnergyCut( |
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| 190 | const G4ParticleDefinition*, |
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| 191 | const G4MaterialCutsCouple* couple) { |
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| 192 | |
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| 193 | return couple -> GetMaterial() -> GetIonisation() -> |
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| 194 | GetMeanExcitationEnergy(); |
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| 195 | } |
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| 196 | |
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[1055] | 197 | // ######################################################################### |
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[968] | 198 | |
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[1340] | 199 | G4double G4IonParametrisedLossModel::MaxSecondaryEnergy( |
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| 200 | const G4ParticleDefinition* particle, |
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| 201 | G4double kineticEnergy) { |
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| 202 | |
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| 203 | // ############## Maximum energy of secondaries ########################## |
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| 204 | // Function computes maximum energy of secondary electrons which are |
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| 205 | // released by an ion |
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| 206 | // |
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| 207 | // See Geant4 physics reference manual (version 9.1), section 9.1.1 |
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| 208 | // |
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| 209 | // Ref.: W.M. Yao et al, Jour. of Phys. G 33 (2006) 1. |
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| 210 | // C.Caso et al. (Part. Data Group), Europ. Phys. Jour. C 3 1 (1998). |
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| 211 | // B. Rossi, High energy particles, New York, NY: Prentice-Hall (1952). |
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| 212 | // |
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| 213 | // (Implementation adapted from G4BraggIonModel) |
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| 214 | |
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| 215 | if(particle != cacheParticle) UpdateCache(particle); |
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| 216 | |
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| 217 | G4double tau = kineticEnergy/cacheMass; |
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| 218 | G4double tmax = 2.0 * electron_mass_c2 * tau * (tau + 2.) / |
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| 219 | (1. + 2.0 * (tau + 1.) * cacheElecMassRatio + |
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| 220 | cacheElecMassRatio * cacheElecMassRatio); |
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| 221 | |
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| 222 | return tmax; |
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| 223 | } |
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| 224 | |
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| 225 | // ######################################################################### |
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| 226 | |
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| 227 | G4double G4IonParametrisedLossModel::GetChargeSquareRatio( |
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| 228 | const G4ParticleDefinition* particle, |
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| 229 | const G4Material* material, |
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| 230 | G4double kineticEnergy) { // Kinetic energy |
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| 231 | |
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| 232 | G4double chargeSquareRatio = corrections -> |
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| 233 | EffectiveChargeSquareRatio(particle, |
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| 234 | material, |
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| 235 | kineticEnergy); |
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| 236 | corrFactor = chargeSquareRatio * |
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| 237 | corrections -> EffectiveChargeCorrection(particle, |
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| 238 | material, |
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| 239 | kineticEnergy); |
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| 240 | return corrFactor; |
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| 241 | } |
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| 242 | |
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| 243 | // ######################################################################### |
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| 244 | |
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| 245 | G4double G4IonParametrisedLossModel::GetParticleCharge( |
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| 246 | const G4ParticleDefinition* particle, |
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| 247 | const G4Material* material, |
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| 248 | G4double kineticEnergy) { // Kinetic energy |
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| 249 | |
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| 250 | return corrections -> GetParticleCharge(particle, material, kineticEnergy); |
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| 251 | } |
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| 252 | |
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| 253 | // ######################################################################### |
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| 254 | |
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[968] | 255 | void G4IonParametrisedLossModel::Initialise( |
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| 256 | const G4ParticleDefinition* particle, |
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| 257 | const G4DataVector& cuts) { |
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| 258 | |
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| 259 | // Cached parameters are reset |
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| 260 | cacheParticle = 0; |
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| 261 | cacheMass = 0; |
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| 262 | cacheElecMassRatio = 0; |
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| 263 | cacheChargeSquare = 0; |
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| 264 | |
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| 265 | // Cached parameters are reset |
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[1228] | 266 | rangeCacheParticle = 0; |
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| 267 | rangeCacheMatCutsCouple = 0; |
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| 268 | rangeCacheEnergyRange = 0; |
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| 269 | rangeCacheRangeEnergy = 0; |
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| 270 | |
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| 271 | // Cached parameters are reset |
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[968] | 272 | dedxCacheParticle = 0; |
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| 273 | dedxCacheMaterial = 0; |
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| 274 | dedxCacheEnergyCut = 0; |
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[1055] | 275 | dedxCacheIter = lossTableList.end(); |
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[968] | 276 | dedxCacheTransitionEnergy = 0.0; |
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| 277 | dedxCacheTransitionFactor = 0.0; |
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| 278 | dedxCacheGenIonMassRatio = 0.0; |
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| 279 | |
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| 280 | // The cache of loss tables is cleared |
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| 281 | LossTableList::iterator iterTables = lossTableList.begin(); |
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| 282 | LossTableList::iterator iterTables_end = lossTableList.end(); |
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| 283 | |
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| 284 | for(;iterTables != iterTables_end; iterTables++) |
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| 285 | (*iterTables) -> ClearCache(); |
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| 286 | |
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| 287 | // Range vs energy and energy vs range vectors from previous runs are |
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| 288 | // cleared |
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| 289 | RangeEnergyTable::iterator iterRange = r.begin(); |
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| 290 | RangeEnergyTable::iterator iterRange_end = r.end(); |
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| 291 | |
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| 292 | for(;iterRange != iterRange_end; iterRange++) delete iterRange -> second; |
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| 293 | r.clear(); |
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| 294 | |
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| 295 | EnergyRangeTable::iterator iterEnergy = E.begin(); |
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| 296 | EnergyRangeTable::iterator iterEnergy_end = E.end(); |
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| 297 | |
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| 298 | for(;iterEnergy != iterEnergy_end; iterEnergy++) delete iterEnergy -> second; |
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| 299 | E.clear(); |
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| 300 | |
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| 301 | // The cut energies are (re)loaded |
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| 302 | size_t size = cuts.size(); |
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| 303 | cutEnergies.clear(); |
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| 304 | for(size_t i = 0; i < size; i++) cutEnergies.push_back(cuts[i]); |
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| 305 | |
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[1055] | 306 | // All dE/dx vectors are built |
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| 307 | const G4ProductionCutsTable* coupleTable= |
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| 308 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 309 | size_t nmbCouples = coupleTable -> GetTableSize(); |
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| 310 | |
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| 311 | #ifdef PRINT_TABLE_BUILT |
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| 312 | G4cout << "G4IonParametrisedLossModel::Initialise():" |
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| 313 | << " Building dE/dx vectors:" |
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| 314 | << G4endl; |
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| 315 | #endif |
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| 316 | |
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| 317 | for (size_t i = 0; i < nmbCouples; i++) { |
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| 318 | |
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| 319 | const G4MaterialCutsCouple* couple = |
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| 320 | coupleTable -> GetMaterialCutsCouple(i); |
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| 321 | |
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| 322 | const G4Material* material = couple -> GetMaterial(); |
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| 323 | // G4ProductionCuts* productionCuts = couple -> GetProductionCuts(); |
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| 324 | |
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| 325 | for(G4int atomicNumberIon = 3; atomicNumberIon < 102; atomicNumberIon++) { |
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| 326 | |
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| 327 | LossTableList::iterator iter = lossTableList.begin(); |
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| 328 | LossTableList::iterator iter_end = lossTableList.end(); |
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| 329 | |
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| 330 | for(;iter != iter_end; iter++) { |
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| 331 | |
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| 332 | if(*iter == 0) { |
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| 333 | G4cout << "G4IonParametrisedLossModel::Initialise():" |
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| 334 | << " Skipping illegal table." |
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| 335 | << G4endl; |
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| 336 | } |
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| 337 | |
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| 338 | G4bool isApplicable = |
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| 339 | (*iter) -> BuildDEDXTable(atomicNumberIon, material); |
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| 340 | if(isApplicable) { |
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| 341 | |
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| 342 | #ifdef PRINT_TABLE_BUILT |
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| 343 | G4cout << " Atomic Number Ion = " << atomicNumberIon |
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| 344 | << ", Material = " << material -> GetName() |
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| 345 | << ", Table = " << (*iter) -> GetName() |
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| 346 | << G4endl; |
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| 347 | #endif |
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| 348 | break; |
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| 349 | } |
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| 350 | } |
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| 351 | } |
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| 352 | } |
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| 353 | |
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[1340] | 354 | // The particle change object |
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| 355 | if(! particleChangeLoss) { |
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| 356 | particleChangeLoss = GetParticleChangeForLoss(); |
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[968] | 357 | } |
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| 358 | |
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| 359 | // The G4BraggIonModel and G4BetheBlochModel instances are initialised with |
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| 360 | // the same settings as the current model: |
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| 361 | braggIonModel -> Initialise(particle, cuts); |
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| 362 | betheBlochModel -> Initialise(particle, cuts); |
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| 363 | } |
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| 364 | |
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[1055] | 365 | // ######################################################################### |
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[968] | 366 | |
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| 367 | G4double G4IonParametrisedLossModel::ComputeCrossSectionPerAtom( |
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| 368 | const G4ParticleDefinition* particle, |
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| 369 | G4double kineticEnergy, |
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| 370 | G4double atomicNumber, |
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| 371 | G4double, |
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| 372 | G4double cutEnergy, |
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| 373 | G4double maxKinEnergy) { |
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| 374 | |
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| 375 | // ############## Cross section per atom ################################ |
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| 376 | // Function computes ionization cross section per atom |
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| 377 | // |
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| 378 | // See Geant4 physics reference manual (version 9.1), section 9.1.3 |
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| 379 | // |
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| 380 | // Ref.: W.M. Yao et al, Jour. of Phys. G 33 (2006) 1. |
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| 381 | // B. Rossi, High energy particles, New York, NY: Prentice-Hall (1952). |
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| 382 | // |
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| 383 | // (Implementation adapted from G4BraggIonModel) |
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| 384 | |
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| 385 | G4double crosssection = 0.0; |
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| 386 | G4double tmax = MaxSecondaryEnergy(particle, kineticEnergy); |
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| 387 | G4double maxEnergy = std::min(tmax, maxKinEnergy); |
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| 388 | |
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| 389 | if(cutEnergy < tmax) { |
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| 390 | |
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| 391 | G4double energy = kineticEnergy + cacheMass; |
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| 392 | G4double betaSquared = kineticEnergy * |
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| 393 | (energy + cacheMass) / (energy * energy); |
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| 394 | |
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| 395 | crosssection = 1.0 / cutEnergy - 1.0 / maxEnergy - |
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| 396 | betaSquared * std::log(maxEnergy / cutEnergy) / tmax; |
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| 397 | |
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| 398 | crosssection *= twopi_mc2_rcl2 * cacheChargeSquare / betaSquared; |
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| 399 | } |
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| 400 | |
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| 401 | #ifdef PRINT_DEBUG_CS |
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| 402 | G4cout << "########################################################" |
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| 403 | << G4endl |
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| 404 | << "# G4IonParametrisedLossModel::ComputeCrossSectionPerAtom" |
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| 405 | << G4endl |
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| 406 | << "# particle =" << particle -> GetParticleName() |
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| 407 | << G4endl |
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| 408 | << "# cut(MeV) = " << cutEnergy/MeV |
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| 409 | << G4endl; |
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| 410 | |
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| 411 | G4cout << "#" |
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| 412 | << std::setw(13) << std::right << "E(MeV)" |
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| 413 | << std::setw(14) << "CS(um)" |
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| 414 | << std::setw(14) << "E_max_sec(MeV)" |
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| 415 | << G4endl |
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| 416 | << "# ------------------------------------------------------" |
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| 417 | << G4endl; |
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| 418 | |
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| 419 | G4cout << std::setw(14) << std::right << kineticEnergy / MeV |
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| 420 | << std::setw(14) << crosssection / (um * um) |
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| 421 | << std::setw(14) << tmax / MeV |
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| 422 | << G4endl; |
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| 423 | #endif |
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| 424 | |
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| 425 | crosssection *= atomicNumber; |
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| 426 | |
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| 427 | return crosssection; |
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| 428 | } |
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| 429 | |
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[1055] | 430 | // ######################################################################### |
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[968] | 431 | |
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| 432 | G4double G4IonParametrisedLossModel::CrossSectionPerVolume( |
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| 433 | const G4Material* material, |
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| 434 | const G4ParticleDefinition* particle, |
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| 435 | G4double kineticEnergy, |
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| 436 | G4double cutEnergy, |
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| 437 | G4double maxEnergy) { |
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| 438 | |
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| 439 | G4double nbElecPerVolume = material -> GetTotNbOfElectPerVolume(); |
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| 440 | G4double cross = ComputeCrossSectionPerAtom(particle, |
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| 441 | kineticEnergy, |
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| 442 | nbElecPerVolume, 0, |
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| 443 | cutEnergy, |
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| 444 | maxEnergy); |
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| 445 | |
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| 446 | return cross; |
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| 447 | } |
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| 448 | |
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[1055] | 449 | // ######################################################################### |
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[968] | 450 | |
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| 451 | G4double G4IonParametrisedLossModel::ComputeDEDXPerVolume( |
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| 452 | const G4Material* material, |
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| 453 | const G4ParticleDefinition* particle, |
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| 454 | G4double kineticEnergy, |
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| 455 | G4double cutEnergy) { |
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| 456 | |
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| 457 | // ############## dE/dx ################################################## |
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| 458 | // Function computes dE/dx values, where following rules are adopted: |
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| 459 | // A. If the ion-material pair is covered by any native ion data |
---|
| 460 | // parameterisation, then: |
---|
| 461 | // * This parameterization is used for energies below a given energy |
---|
| 462 | // limit, |
---|
| 463 | // * whereas above the limit the Bethe-Bloch model is applied, in |
---|
| 464 | // combination with an effective charge estimate and high order |
---|
| 465 | // correction terms. |
---|
| 466 | // A smoothing procedure is applied to dE/dx values computed with |
---|
| 467 | // the second approach. The smoothing factor is based on the dE/dx |
---|
| 468 | // values of both approaches at the transition energy (high order |
---|
| 469 | // correction terms are included in the calculation of the transition |
---|
| 470 | // factor). |
---|
| 471 | // B. If the particle is a generic ion, the BraggIon and Bethe-Bloch |
---|
| 472 | // models are used and a smoothing procedure is applied to values |
---|
| 473 | // obtained with the second approach. |
---|
| 474 | // C. If the ion-material is not covered by any ion data parameterization |
---|
| 475 | // then: |
---|
| 476 | // * The BraggIon model is used for energies below a given energy |
---|
| 477 | // limit, |
---|
| 478 | // * whereas above the limit the Bethe-Bloch model is applied, in |
---|
| 479 | // combination with an effective charge estimate and high order |
---|
| 480 | // correction terms. |
---|
| 481 | // Also in this case, a smoothing procedure is applied to dE/dx values |
---|
| 482 | // computed with the second model. |
---|
| 483 | |
---|
| 484 | G4double dEdx = 0.0; |
---|
| 485 | UpdateDEDXCache(particle, material, cutEnergy); |
---|
| 486 | |
---|
| 487 | LossTableList::iterator iter = dedxCacheIter; |
---|
| 488 | |
---|
[1055] | 489 | if(iter != lossTableList.end()) { |
---|
[968] | 490 | |
---|
| 491 | G4double transitionEnergy = dedxCacheTransitionEnergy; |
---|
| 492 | |
---|
| 493 | if(transitionEnergy > kineticEnergy) { |
---|
| 494 | |
---|
| 495 | dEdx = (*iter) -> GetDEDX(particle, material, kineticEnergy); |
---|
| 496 | |
---|
| 497 | G4double dEdxDeltaRays = DeltaRayMeanEnergyTransferRate(material, |
---|
| 498 | particle, |
---|
| 499 | kineticEnergy, |
---|
| 500 | cutEnergy); |
---|
| 501 | dEdx -= dEdxDeltaRays; |
---|
| 502 | } |
---|
| 503 | else { |
---|
| 504 | G4double massRatio = dedxCacheGenIonMassRatio; |
---|
| 505 | |
---|
| 506 | G4double chargeSquare = |
---|
| 507 | GetChargeSquareRatio(particle, material, kineticEnergy); |
---|
| 508 | |
---|
| 509 | G4double scaledKineticEnergy = kineticEnergy * massRatio; |
---|
| 510 | G4double scaledTransitionEnergy = transitionEnergy * massRatio; |
---|
| 511 | |
---|
| 512 | G4double lowEnergyLimit = betheBlochModel -> LowEnergyLimit(); |
---|
| 513 | |
---|
| 514 | if(scaledTransitionEnergy >= lowEnergyLimit) { |
---|
| 515 | |
---|
| 516 | dEdx = betheBlochModel -> ComputeDEDXPerVolume( |
---|
| 517 | material, genericIon, |
---|
| 518 | scaledKineticEnergy, cutEnergy); |
---|
[1055] | 519 | |
---|
| 520 | dEdx *= chargeSquare; |
---|
[968] | 521 | |
---|
[1055] | 522 | dEdx += corrections -> ComputeIonCorrections(particle, |
---|
| 523 | material, kineticEnergy); |
---|
[968] | 524 | |
---|
[1055] | 525 | G4double factor = 1.0 + dedxCacheTransitionFactor / |
---|
| 526 | kineticEnergy; |
---|
| 527 | |
---|
| 528 | dEdx *= factor; |
---|
| 529 | } |
---|
[968] | 530 | } |
---|
| 531 | } |
---|
| 532 | else { |
---|
| 533 | G4double massRatio = 1.0; |
---|
| 534 | G4double chargeSquare = 1.0; |
---|
| 535 | |
---|
| 536 | if(particle != genericIon) { |
---|
| 537 | |
---|
| 538 | chargeSquare = GetChargeSquareRatio(particle, material, kineticEnergy); |
---|
| 539 | massRatio = genericIonPDGMass / particle -> GetPDGMass(); |
---|
| 540 | } |
---|
| 541 | |
---|
| 542 | G4double scaledKineticEnergy = kineticEnergy * massRatio; |
---|
| 543 | |
---|
| 544 | G4double lowEnergyLimit = betheBlochModel -> LowEnergyLimit(); |
---|
| 545 | if(scaledKineticEnergy < lowEnergyLimit) { |
---|
| 546 | dEdx = braggIonModel -> ComputeDEDXPerVolume( |
---|
| 547 | material, genericIon, |
---|
| 548 | scaledKineticEnergy, cutEnergy); |
---|
| 549 | |
---|
| 550 | dEdx *= chargeSquare; |
---|
| 551 | } |
---|
| 552 | else { |
---|
| 553 | G4double dEdxLimitParam = braggIonModel -> ComputeDEDXPerVolume( |
---|
| 554 | material, genericIon, |
---|
| 555 | lowEnergyLimit, cutEnergy); |
---|
| 556 | |
---|
| 557 | G4double dEdxLimitBetheBloch = betheBlochModel -> ComputeDEDXPerVolume( |
---|
| 558 | material, genericIon, |
---|
| 559 | lowEnergyLimit, cutEnergy); |
---|
| 560 | |
---|
| 561 | if(particle != genericIon) { |
---|
| 562 | G4double chargeSquareLowEnergyLimit = |
---|
| 563 | GetChargeSquareRatio(particle, material, |
---|
| 564 | lowEnergyLimit / massRatio); |
---|
| 565 | |
---|
| 566 | dEdxLimitParam *= chargeSquareLowEnergyLimit; |
---|
| 567 | dEdxLimitBetheBloch *= chargeSquareLowEnergyLimit; |
---|
| 568 | |
---|
| 569 | dEdxLimitBetheBloch += |
---|
| 570 | corrections -> ComputeIonCorrections(particle, |
---|
| 571 | material, lowEnergyLimit / massRatio); |
---|
| 572 | } |
---|
| 573 | |
---|
| 574 | G4double factor = (1.0 + (dEdxLimitParam/dEdxLimitBetheBloch - 1.0) |
---|
| 575 | * lowEnergyLimit / scaledKineticEnergy); |
---|
| 576 | |
---|
| 577 | dEdx = betheBlochModel -> ComputeDEDXPerVolume( |
---|
| 578 | material, genericIon, |
---|
| 579 | scaledKineticEnergy, cutEnergy); |
---|
| 580 | |
---|
| 581 | dEdx *= chargeSquare; |
---|
| 582 | |
---|
| 583 | if(particle != genericIon) { |
---|
| 584 | dEdx += corrections -> ComputeIonCorrections(particle, |
---|
| 585 | material, kineticEnergy); |
---|
| 586 | } |
---|
[1192] | 587 | |
---|
| 588 | dEdx *= factor; |
---|
[968] | 589 | } |
---|
| 590 | |
---|
| 591 | } |
---|
| 592 | |
---|
| 593 | if (dEdx < 0.0) dEdx = 0.0; |
---|
| 594 | |
---|
| 595 | return dEdx; |
---|
| 596 | } |
---|
| 597 | |
---|
[1055] | 598 | // ######################################################################### |
---|
[968] | 599 | |
---|
| 600 | void G4IonParametrisedLossModel::PrintDEDXTable( |
---|
| 601 | const G4ParticleDefinition* particle, // Projectile (ion) |
---|
| 602 | const G4Material* material, // Absorber material |
---|
| 603 | G4double lowerBoundary, // Minimum energy per nucleon |
---|
| 604 | G4double upperBoundary, // Maximum energy per nucleon |
---|
| 605 | G4int nmbBins, // Number of bins |
---|
| 606 | G4bool logScaleEnergy) { // Logarithmic scaling of energy |
---|
| 607 | |
---|
| 608 | G4double atomicMassNumber = particle -> GetAtomicMass(); |
---|
| 609 | G4double materialDensity = material -> GetDensity(); |
---|
| 610 | |
---|
| 611 | G4cout << "# dE/dx table for " << particle -> GetParticleName() |
---|
| 612 | << " in material " << material -> GetName() |
---|
| 613 | << " of density " << materialDensity / g * cm3 |
---|
| 614 | << " g/cm3" |
---|
| 615 | << G4endl |
---|
| 616 | << "# Projectile mass number A1 = " << atomicMassNumber |
---|
| 617 | << G4endl |
---|
| 618 | << "# ------------------------------------------------------" |
---|
| 619 | << G4endl; |
---|
| 620 | G4cout << "#" |
---|
| 621 | << std::setw(13) << std::right << "E" |
---|
| 622 | << std::setw(14) << "E/A1" |
---|
| 623 | << std::setw(14) << "dE/dx" |
---|
| 624 | << std::setw(14) << "1/rho*dE/dx" |
---|
| 625 | << G4endl; |
---|
| 626 | G4cout << "#" |
---|
| 627 | << std::setw(13) << std::right << "(MeV)" |
---|
| 628 | << std::setw(14) << "(MeV)" |
---|
[1055] | 629 | << std::setw(14) << "(MeV/cm)" |
---|
[968] | 630 | << std::setw(14) << "(MeV*cm2/mg)" |
---|
| 631 | << G4endl |
---|
| 632 | << "# ------------------------------------------------------" |
---|
| 633 | << G4endl; |
---|
| 634 | |
---|
| 635 | G4double energyLowerBoundary = lowerBoundary * atomicMassNumber; |
---|
| 636 | G4double energyUpperBoundary = upperBoundary * atomicMassNumber; |
---|
| 637 | |
---|
| 638 | if(logScaleEnergy) { |
---|
| 639 | |
---|
| 640 | energyLowerBoundary = std::log(energyLowerBoundary); |
---|
| 641 | energyUpperBoundary = std::log(energyUpperBoundary); |
---|
| 642 | } |
---|
| 643 | |
---|
| 644 | G4double deltaEnergy = (energyUpperBoundary - energyLowerBoundary) / |
---|
| 645 | G4double(nmbBins); |
---|
| 646 | |
---|
| 647 | for(int i = 0; i < nmbBins + 1; i++) { |
---|
| 648 | |
---|
| 649 | G4double energy = energyLowerBoundary + i * deltaEnergy; |
---|
| 650 | if(logScaleEnergy) energy = std::exp(energy); |
---|
| 651 | |
---|
| 652 | G4double dedx = ComputeDEDXPerVolume(material, particle, energy, DBL_MAX); |
---|
| 653 | G4cout.precision(6); |
---|
| 654 | G4cout << std::setw(14) << std::right << energy / MeV |
---|
| 655 | << std::setw(14) << energy / atomicMassNumber / MeV |
---|
[1055] | 656 | << std::setw(14) << dedx / MeV * cm |
---|
[968] | 657 | << std::setw(14) << dedx / materialDensity / (MeV*cm2/(0.001*g)) |
---|
| 658 | << G4endl; |
---|
| 659 | } |
---|
| 660 | } |
---|
| 661 | |
---|
[1055] | 662 | // ######################################################################### |
---|
[968] | 663 | |
---|
[1055] | 664 | void G4IonParametrisedLossModel::PrintDEDXTableHandlers( |
---|
| 665 | const G4ParticleDefinition* particle, // Projectile (ion) |
---|
| 666 | const G4Material* material, // Absorber material |
---|
| 667 | G4double lowerBoundary, // Minimum energy per nucleon |
---|
| 668 | G4double upperBoundary, // Maximum energy per nucleon |
---|
| 669 | G4int nmbBins, // Number of bins |
---|
| 670 | G4bool logScaleEnergy) { // Logarithmic scaling of energy |
---|
| 671 | |
---|
| 672 | LossTableList::iterator iter = lossTableList.begin(); |
---|
| 673 | LossTableList::iterator iter_end = lossTableList.end(); |
---|
| 674 | |
---|
| 675 | for(;iter != iter_end; iter++) { |
---|
| 676 | G4bool isApplicable = (*iter) -> IsApplicable(particle, material); |
---|
| 677 | if(isApplicable) { |
---|
| 678 | (*iter) -> PrintDEDXTable(particle, material, |
---|
| 679 | lowerBoundary, upperBoundary, |
---|
| 680 | nmbBins,logScaleEnergy); |
---|
| 681 | break; |
---|
| 682 | } |
---|
| 683 | } |
---|
| 684 | } |
---|
| 685 | |
---|
| 686 | // ######################################################################### |
---|
| 687 | |
---|
[968] | 688 | void G4IonParametrisedLossModel::SampleSecondaries( |
---|
| 689 | std::vector<G4DynamicParticle*>* secondaries, |
---|
| 690 | const G4MaterialCutsCouple*, |
---|
| 691 | const G4DynamicParticle* particle, |
---|
| 692 | G4double cutKinEnergySec, |
---|
| 693 | G4double userMaxKinEnergySec) { |
---|
| 694 | |
---|
| 695 | |
---|
| 696 | // ############## Sampling of secondaries ################################# |
---|
| 697 | // The probability density function (pdf) of the kinetic energy T of a |
---|
| 698 | // secondary electron may be written as: |
---|
| 699 | // pdf(T) = f(T) * g(T) |
---|
| 700 | // where |
---|
| 701 | // f(T) = (Tmax - Tcut) / (Tmax * Tcut) * (1 / T^2) |
---|
| 702 | // g(T) = 1 - beta^2 * T / Tmax |
---|
| 703 | // where Tmax is the maximum kinetic energy of the secondary, Tcut |
---|
| 704 | // is the lower energy cut and beta is the kinetic energy of the |
---|
| 705 | // projectile. |
---|
| 706 | // |
---|
| 707 | // Sampling of the kinetic energy of a secondary electron: |
---|
| 708 | // 1) T0 is sampled from f(T) using the cumulated distribution function |
---|
| 709 | // F(T) = int_Tcut^T f(T')dT' |
---|
| 710 | // 2) T is accepted or rejected by evaluating the rejection function g(T) |
---|
| 711 | // at the sampled energy T0 against a randomly sampled value |
---|
| 712 | // |
---|
| 713 | // |
---|
| 714 | // See Geant4 physics reference manual (version 9.1), section 9.1.4 |
---|
| 715 | // |
---|
| 716 | // |
---|
| 717 | // Reference pdf: W.M. Yao et al, Jour. of Phys. G 33 (2006) 1. |
---|
| 718 | // |
---|
| 719 | // (Implementation adapted from G4BraggIonModel) |
---|
| 720 | |
---|
| 721 | G4double rossiMaxKinEnergySec = MaxSecondaryKinEnergy(particle); |
---|
| 722 | G4double maxKinEnergySec = |
---|
| 723 | std::min(rossiMaxKinEnergySec, userMaxKinEnergySec); |
---|
| 724 | |
---|
| 725 | if(cutKinEnergySec >= maxKinEnergySec) return; |
---|
| 726 | |
---|
| 727 | G4double kineticEnergy = particle -> GetKineticEnergy(); |
---|
| 728 | G4ThreeVector direction = particle ->GetMomentumDirection(); |
---|
| 729 | |
---|
| 730 | G4double energy = kineticEnergy + cacheMass; |
---|
| 731 | G4double betaSquared = kineticEnergy * |
---|
| 732 | (energy + cacheMass) / (energy * energy); |
---|
| 733 | |
---|
| 734 | G4double kinEnergySec; |
---|
| 735 | G4double g; |
---|
| 736 | |
---|
| 737 | do { |
---|
| 738 | |
---|
| 739 | // Sampling kinetic energy from f(T) (using F(T)): |
---|
| 740 | G4double xi = G4UniformRand(); |
---|
| 741 | kinEnergySec = cutKinEnergySec * maxKinEnergySec / |
---|
| 742 | (maxKinEnergySec * (1.0 - xi) + cutKinEnergySec * xi); |
---|
| 743 | |
---|
| 744 | // Deriving the value of the rejection function at the obtained kinetic |
---|
| 745 | // energy: |
---|
| 746 | g = 1.0 - betaSquared * kinEnergySec / rossiMaxKinEnergySec; |
---|
| 747 | |
---|
| 748 | if(g > 1.0) { |
---|
| 749 | G4cout << "G4IonParametrisedLossModel::SampleSecondary Warning: " |
---|
| 750 | << "Majorant 1.0 < " |
---|
| 751 | << g << " for e= " << kinEnergySec |
---|
| 752 | << G4endl; |
---|
| 753 | } |
---|
| 754 | |
---|
| 755 | } while( G4UniformRand() >= g ); |
---|
| 756 | |
---|
| 757 | G4double momentumSec = |
---|
| 758 | std::sqrt(kinEnergySec * (kinEnergySec + 2.0 * electron_mass_c2)); |
---|
| 759 | |
---|
| 760 | G4double totMomentum = energy*std::sqrt(betaSquared); |
---|
| 761 | G4double cost = kinEnergySec * (energy + electron_mass_c2) / |
---|
| 762 | (momentumSec * totMomentum); |
---|
| 763 | if(cost > 1.0) cost = 1.0; |
---|
| 764 | G4double sint = std::sqrt((1.0 - cost)*(1.0 + cost)); |
---|
| 765 | |
---|
| 766 | G4double phi = twopi * G4UniformRand() ; |
---|
| 767 | |
---|
| 768 | G4ThreeVector directionSec(sint*std::cos(phi),sint*std::sin(phi), cost) ; |
---|
| 769 | directionSec.rotateUz(direction); |
---|
| 770 | |
---|
| 771 | // create G4DynamicParticle object for delta ray |
---|
| 772 | G4DynamicParticle* delta = new G4DynamicParticle(G4Electron::Definition(), |
---|
| 773 | directionSec, |
---|
| 774 | kinEnergySec); |
---|
| 775 | |
---|
| 776 | secondaries -> push_back(delta); |
---|
| 777 | |
---|
| 778 | // Change kinematics of primary particle |
---|
| 779 | kineticEnergy -= kinEnergySec; |
---|
| 780 | G4ThreeVector finalP = direction*totMomentum - directionSec*momentumSec; |
---|
| 781 | finalP = finalP.unit(); |
---|
| 782 | |
---|
| 783 | particleChangeLoss -> SetProposedKineticEnergy(kineticEnergy); |
---|
| 784 | particleChangeLoss -> SetProposedMomentumDirection(finalP); |
---|
| 785 | } |
---|
| 786 | |
---|
[1055] | 787 | // ######################################################################### |
---|
[968] | 788 | |
---|
[1228] | 789 | void G4IonParametrisedLossModel::UpdateRangeCache( |
---|
| 790 | const G4ParticleDefinition* particle, |
---|
| 791 | const G4MaterialCutsCouple* matCutsCouple) { |
---|
| 792 | |
---|
| 793 | // ############## Caching ################################################## |
---|
| 794 | // If the ion-material-cut combination is covered by any native ion data |
---|
| 795 | // parameterisation (for low energies), range vectors are computed |
---|
| 796 | |
---|
| 797 | if(particle == rangeCacheParticle && |
---|
| 798 | matCutsCouple == rangeCacheMatCutsCouple) { |
---|
| 799 | } |
---|
| 800 | else{ |
---|
| 801 | rangeCacheParticle = particle; |
---|
| 802 | rangeCacheMatCutsCouple = matCutsCouple; |
---|
| 803 | |
---|
| 804 | const G4Material* material = matCutsCouple -> GetMaterial(); |
---|
| 805 | LossTableList::iterator iter = IsApplicable(particle, material); |
---|
| 806 | |
---|
| 807 | // If any table is applicable, the transition factor is computed: |
---|
| 808 | if(iter != lossTableList.end()) { |
---|
| 809 | |
---|
| 810 | // Build range-energy and energy-range vectors if they don't exist |
---|
| 811 | IonMatCouple ionMatCouple = std::make_pair(particle, matCutsCouple); |
---|
| 812 | RangeEnergyTable::iterator iterRange = r.find(ionMatCouple); |
---|
| 813 | |
---|
| 814 | if(iterRange == r.end()) BuildRangeVector(particle, matCutsCouple); |
---|
| 815 | |
---|
| 816 | rangeCacheEnergyRange = E[ionMatCouple]; |
---|
| 817 | rangeCacheRangeEnergy = r[ionMatCouple]; |
---|
| 818 | } |
---|
| 819 | else { |
---|
| 820 | rangeCacheEnergyRange = 0; |
---|
| 821 | rangeCacheRangeEnergy = 0; |
---|
| 822 | } |
---|
| 823 | } |
---|
| 824 | } |
---|
| 825 | |
---|
| 826 | // ######################################################################### |
---|
| 827 | |
---|
[968] | 828 | void G4IonParametrisedLossModel::UpdateDEDXCache( |
---|
| 829 | const G4ParticleDefinition* particle, |
---|
| 830 | const G4Material* material, |
---|
| 831 | G4double cutEnergy) { |
---|
| 832 | |
---|
| 833 | // ############## Caching ################################################## |
---|
| 834 | // If the ion-material combination is covered by any native ion data |
---|
| 835 | // parameterisation (for low energies), a transition factor is computed |
---|
| 836 | // which is applied to Bethe-Bloch results at higher energies to |
---|
| 837 | // guarantee a smooth transition. |
---|
| 838 | // This factor only needs to be calculated for the first step an ion |
---|
| 839 | // performs inside a certain material. |
---|
| 840 | |
---|
| 841 | if(particle == dedxCacheParticle && |
---|
| 842 | material == dedxCacheMaterial && |
---|
| 843 | cutEnergy == dedxCacheEnergyCut) { |
---|
| 844 | } |
---|
| 845 | else { |
---|
| 846 | |
---|
| 847 | dedxCacheParticle = particle; |
---|
| 848 | dedxCacheMaterial = material; |
---|
| 849 | dedxCacheEnergyCut = cutEnergy; |
---|
| 850 | |
---|
| 851 | G4double massRatio = genericIonPDGMass / particle -> GetPDGMass(); |
---|
| 852 | dedxCacheGenIonMassRatio = massRatio; |
---|
| 853 | |
---|
| 854 | LossTableList::iterator iter = IsApplicable(particle, material); |
---|
| 855 | dedxCacheIter = iter; |
---|
| 856 | |
---|
| 857 | // If any table is applicable, the transition factor is computed: |
---|
[1055] | 858 | if(iter != lossTableList.end()) { |
---|
[968] | 859 | |
---|
| 860 | // Retrieving the transition energy from the parameterisation table |
---|
| 861 | G4double transitionEnergy = |
---|
| 862 | (*iter) -> GetUpperEnergyEdge(particle, material); |
---|
| 863 | dedxCacheTransitionEnergy = transitionEnergy; |
---|
| 864 | |
---|
| 865 | // Computing dE/dx from low-energy parameterisation at |
---|
| 866 | // transition energy |
---|
| 867 | G4double dEdxParam = (*iter) -> GetDEDX(particle, material, |
---|
| 868 | transitionEnergy); |
---|
| 869 | |
---|
| 870 | G4double dEdxDeltaRays = DeltaRayMeanEnergyTransferRate(material, |
---|
| 871 | particle, |
---|
| 872 | transitionEnergy, |
---|
| 873 | cutEnergy); |
---|
| 874 | dEdxParam -= dEdxDeltaRays; |
---|
| 875 | |
---|
| 876 | // Computing dE/dx from Bethe-Bloch formula at transition |
---|
| 877 | // energy |
---|
| 878 | G4double transitionChargeSquare = |
---|
| 879 | GetChargeSquareRatio(particle, material, transitionEnergy); |
---|
| 880 | |
---|
| 881 | G4double scaledTransitionEnergy = transitionEnergy * massRatio; |
---|
| 882 | |
---|
| 883 | G4double dEdxBetheBloch = |
---|
| 884 | betheBlochModel -> ComputeDEDXPerVolume( |
---|
| 885 | material, genericIon, |
---|
| 886 | scaledTransitionEnergy, cutEnergy); |
---|
| 887 | dEdxBetheBloch *= transitionChargeSquare; |
---|
| 888 | |
---|
| 889 | // Additionally, high order corrections are added |
---|
| 890 | dEdxBetheBloch += |
---|
| 891 | corrections -> ComputeIonCorrections(particle, |
---|
| 892 | material, transitionEnergy); |
---|
| 893 | |
---|
| 894 | // Computing transition factor from both dE/dx values |
---|
| 895 | dedxCacheTransitionFactor = |
---|
| 896 | (dEdxParam - dEdxBetheBloch)/dEdxBetheBloch |
---|
| 897 | * transitionEnergy; |
---|
| 898 | } |
---|
| 899 | else { |
---|
| 900 | |
---|
| 901 | dedxCacheParticle = particle; |
---|
| 902 | dedxCacheMaterial = material; |
---|
| 903 | dedxCacheEnergyCut = cutEnergy; |
---|
| 904 | |
---|
| 905 | dedxCacheGenIonMassRatio = |
---|
| 906 | genericIonPDGMass / particle -> GetPDGMass(); |
---|
| 907 | |
---|
| 908 | dedxCacheTransitionEnergy = 0.0; |
---|
| 909 | dedxCacheTransitionFactor = 0.0; |
---|
| 910 | } |
---|
| 911 | } |
---|
| 912 | } |
---|
| 913 | |
---|
[1055] | 914 | // ######################################################################### |
---|
[968] | 915 | |
---|
| 916 | void G4IonParametrisedLossModel::CorrectionsAlongStep( |
---|
| 917 | const G4MaterialCutsCouple* couple, |
---|
| 918 | const G4DynamicParticle* dynamicParticle, |
---|
| 919 | G4double& eloss, |
---|
| 920 | G4double&, |
---|
| 921 | G4double length) { |
---|
| 922 | |
---|
| 923 | // ############## Corrections for along step energy loss calculation ###### |
---|
| 924 | // The computed energy loss (due to electronic stopping) is overwritten |
---|
| 925 | // by this function if an ion data parameterization is available for the |
---|
| 926 | // current ion-material pair. |
---|
| 927 | // No action on the energy loss (due to electronic stopping) is performed |
---|
| 928 | // if no parameterization is available. In this case the original |
---|
| 929 | // generic ion tables (in combination with the effective charge) are used |
---|
| 930 | // in the along step DoIt function. |
---|
| 931 | // |
---|
| 932 | // |
---|
| 933 | // (Implementation partly adapted from G4BraggIonModel/G4BetheBlochModel) |
---|
| 934 | |
---|
| 935 | const G4ParticleDefinition* particle = dynamicParticle -> GetDefinition(); |
---|
| 936 | const G4Material* material = couple -> GetMaterial(); |
---|
| 937 | |
---|
| 938 | G4double kineticEnergy = dynamicParticle -> GetKineticEnergy(); |
---|
| 939 | |
---|
[1055] | 940 | if(kineticEnergy == eloss) { return; } |
---|
| 941 | |
---|
[968] | 942 | G4double cutEnergy = DBL_MAX; |
---|
| 943 | size_t cutIndex = couple -> GetIndex(); |
---|
| 944 | cutEnergy = cutEnergies[cutIndex]; |
---|
| 945 | |
---|
| 946 | UpdateDEDXCache(particle, material, cutEnergy); |
---|
| 947 | |
---|
| 948 | LossTableList::iterator iter = dedxCacheIter; |
---|
| 949 | |
---|
| 950 | // If parameterization for ions is available the electronic energy loss |
---|
| 951 | // is overwritten |
---|
[1055] | 952 | if(iter != lossTableList.end()) { |
---|
[968] | 953 | |
---|
| 954 | // The energy loss is calculated using the ComputeDEDXPerVolume function |
---|
| 955 | // and the step length (it is assumed that dE/dx does not change |
---|
| 956 | // considerably along the step) |
---|
| 957 | eloss = |
---|
| 958 | length * ComputeDEDXPerVolume(material, particle, |
---|
| 959 | kineticEnergy, cutEnergy); |
---|
| 960 | |
---|
| 961 | #ifdef PRINT_DEBUG |
---|
| 962 | G4cout.precision(6); |
---|
| 963 | G4cout << "########################################################" |
---|
| 964 | << G4endl |
---|
| 965 | << "# G4IonParametrisedLossModel::CorrectionsAlongStep" |
---|
| 966 | << G4endl |
---|
| 967 | << "# cut(MeV) = " << cutEnergy/MeV |
---|
| 968 | << G4endl; |
---|
| 969 | |
---|
| 970 | G4cout << "#" |
---|
| 971 | << std::setw(13) << std::right << "E(MeV)" |
---|
| 972 | << std::setw(14) << "l(um)" |
---|
| 973 | << std::setw(14) << "l*dE/dx(MeV)" |
---|
| 974 | << std::setw(14) << "(l*dE/dx)/E" |
---|
| 975 | << G4endl |
---|
| 976 | << "# ------------------------------------------------------" |
---|
| 977 | << G4endl; |
---|
| 978 | |
---|
| 979 | G4cout << std::setw(14) << std::right << kineticEnergy / MeV |
---|
| 980 | << std::setw(14) << length / um |
---|
| 981 | << std::setw(14) << eloss / MeV |
---|
| 982 | << std::setw(14) << eloss / kineticEnergy * 100.0 |
---|
| 983 | << G4endl; |
---|
| 984 | #endif |
---|
| 985 | |
---|
| 986 | // If the energy loss exceeds a certain fraction of the kinetic energy |
---|
| 987 | // (the fraction is indicated by the parameter "energyLossLimit") then |
---|
| 988 | // the range tables are used to derive a more accurate value of the |
---|
| 989 | // energy loss |
---|
| 990 | if(eloss > energyLossLimit * kineticEnergy) { |
---|
| 991 | |
---|
[1228] | 992 | eloss = ComputeLossForStep(couple, particle, |
---|
| 993 | kineticEnergy,length); |
---|
[968] | 994 | |
---|
| 995 | #ifdef PRINT_DEBUG |
---|
| 996 | G4cout << "# Correction applied:" |
---|
| 997 | << G4endl; |
---|
| 998 | |
---|
| 999 | G4cout << std::setw(14) << std::right << kineticEnergy / MeV |
---|
| 1000 | << std::setw(14) << length / um |
---|
| 1001 | << std::setw(14) << eloss / MeV |
---|
| 1002 | << std::setw(14) << eloss / kineticEnergy * 100.0 |
---|
| 1003 | << G4endl; |
---|
| 1004 | #endif |
---|
| 1005 | |
---|
| 1006 | } |
---|
| 1007 | } |
---|
| 1008 | |
---|
| 1009 | // For all corrections below a kinetic energy between the Pre- and |
---|
| 1010 | // Post-step energy values is used |
---|
| 1011 | G4double energy = kineticEnergy - eloss * 0.5; |
---|
| 1012 | if(energy < 0.0) energy = kineticEnergy * 0.5; |
---|
| 1013 | |
---|
| 1014 | G4double chargeSquareRatio = corrections -> |
---|
| 1015 | EffectiveChargeSquareRatio(particle, |
---|
| 1016 | material, |
---|
| 1017 | energy); |
---|
| 1018 | GetModelOfFluctuations() -> SetParticleAndCharge(particle, |
---|
| 1019 | chargeSquareRatio); |
---|
| 1020 | |
---|
| 1021 | // A correction is applied considering the change of the effective charge |
---|
| 1022 | // along the step (the parameter "corrFactor" refers to the effective |
---|
| 1023 | // charge at the beginning of the step). Note: the correction is not |
---|
| 1024 | // applied for energy loss values deriving directly from parameterized |
---|
| 1025 | // ion stopping power tables |
---|
| 1026 | G4double transitionEnergy = dedxCacheTransitionEnergy; |
---|
| 1027 | |
---|
[1055] | 1028 | if(iter != lossTableList.end() && transitionEnergy < kineticEnergy) { |
---|
[968] | 1029 | chargeSquareRatio *= corrections -> EffectiveChargeCorrection(particle, |
---|
| 1030 | material, |
---|
| 1031 | energy); |
---|
| 1032 | |
---|
| 1033 | G4double chargeSquareRatioCorr = chargeSquareRatio/corrFactor; |
---|
| 1034 | eloss *= chargeSquareRatioCorr; |
---|
| 1035 | } |
---|
[1055] | 1036 | else if (iter == lossTableList.end()) { |
---|
[968] | 1037 | |
---|
| 1038 | chargeSquareRatio *= corrections -> EffectiveChargeCorrection(particle, |
---|
| 1039 | material, |
---|
| 1040 | energy); |
---|
| 1041 | |
---|
| 1042 | G4double chargeSquareRatioCorr = chargeSquareRatio/corrFactor; |
---|
| 1043 | eloss *= chargeSquareRatioCorr; |
---|
| 1044 | } |
---|
| 1045 | |
---|
| 1046 | // Ion high order corrections are applied if the current model does not |
---|
| 1047 | // overwrite the energy loss (i.e. when the effective charge approach is |
---|
| 1048 | // used) |
---|
[1055] | 1049 | if(iter == lossTableList.end()) { |
---|
[968] | 1050 | |
---|
| 1051 | G4double scaledKineticEnergy = kineticEnergy * dedxCacheGenIonMassRatio; |
---|
| 1052 | G4double lowEnergyLimit = betheBlochModel -> LowEnergyLimit(); |
---|
| 1053 | |
---|
| 1054 | // Corrections are only applied in the Bethe-Bloch energy region |
---|
| 1055 | if(scaledKineticEnergy > lowEnergyLimit) |
---|
| 1056 | eloss += length * |
---|
| 1057 | corrections -> IonHighOrderCorrections(particle, couple, energy); |
---|
| 1058 | } |
---|
| 1059 | } |
---|
| 1060 | |
---|
[1055] | 1061 | // ######################################################################### |
---|
[968] | 1062 | |
---|
| 1063 | void G4IonParametrisedLossModel::BuildRangeVector( |
---|
| 1064 | const G4ParticleDefinition* particle, |
---|
[1228] | 1065 | const G4MaterialCutsCouple* matCutsCouple) { |
---|
[968] | 1066 | |
---|
[1228] | 1067 | G4double cutEnergy = DBL_MAX; |
---|
| 1068 | size_t cutIndex = matCutsCouple -> GetIndex(); |
---|
| 1069 | cutEnergy = cutEnergies[cutIndex]; |
---|
| 1070 | |
---|
| 1071 | const G4Material* material = matCutsCouple -> GetMaterial(); |
---|
| 1072 | |
---|
[968] | 1073 | G4double massRatio = genericIonPDGMass / particle -> GetPDGMass(); |
---|
| 1074 | |
---|
| 1075 | G4double lowerEnergy = lowerEnergyEdgeIntegr / massRatio; |
---|
| 1076 | G4double upperEnergy = upperEnergyEdgeIntegr / massRatio; |
---|
| 1077 | |
---|
| 1078 | G4double logLowerEnergyEdge = std::log(lowerEnergy); |
---|
| 1079 | G4double logUpperEnergyEdge = std::log(upperEnergy); |
---|
| 1080 | |
---|
| 1081 | G4double logDeltaEnergy = (logUpperEnergyEdge - logLowerEnergyEdge) / |
---|
| 1082 | G4double(nmbBins); |
---|
| 1083 | |
---|
| 1084 | G4double logDeltaIntegr = logDeltaEnergy / G4double(nmbSubBins); |
---|
| 1085 | |
---|
| 1086 | G4LPhysicsFreeVector* energyRangeVector = |
---|
| 1087 | new G4LPhysicsFreeVector(nmbBins+1, |
---|
| 1088 | lowerEnergy, |
---|
| 1089 | upperEnergy); |
---|
| 1090 | energyRangeVector -> SetSpline(true); |
---|
| 1091 | |
---|
| 1092 | G4double dedxLow = ComputeDEDXPerVolume(material, |
---|
| 1093 | particle, |
---|
| 1094 | lowerEnergy, |
---|
| 1095 | cutEnergy); |
---|
| 1096 | |
---|
| 1097 | G4double range = 2.0 * lowerEnergy / dedxLow; |
---|
| 1098 | |
---|
| 1099 | energyRangeVector -> PutValues(0, lowerEnergy, range); |
---|
| 1100 | |
---|
| 1101 | G4double logEnergy = std::log(lowerEnergy); |
---|
| 1102 | for(size_t i = 1; i < nmbBins+1; i++) { |
---|
| 1103 | |
---|
| 1104 | G4double logEnergyIntegr = logEnergy; |
---|
| 1105 | |
---|
| 1106 | for(size_t j = 0; j < nmbSubBins; j++) { |
---|
| 1107 | |
---|
| 1108 | G4double binLowerBoundary = std::exp(logEnergyIntegr); |
---|
| 1109 | logEnergyIntegr += logDeltaIntegr; |
---|
| 1110 | |
---|
| 1111 | G4double binUpperBoundary = std::exp(logEnergyIntegr); |
---|
| 1112 | G4double deltaIntegr = binUpperBoundary - binLowerBoundary; |
---|
| 1113 | |
---|
| 1114 | G4double energyIntegr = binLowerBoundary + 0.5 * deltaIntegr; |
---|
| 1115 | |
---|
| 1116 | G4double dedxValue = ComputeDEDXPerVolume(material, |
---|
| 1117 | particle, |
---|
| 1118 | energyIntegr, |
---|
| 1119 | cutEnergy); |
---|
| 1120 | |
---|
| 1121 | if(dedxValue > 0.0) range += deltaIntegr / dedxValue; |
---|
| 1122 | |
---|
| 1123 | #ifdef PRINT_DEBUG_DETAILS |
---|
| 1124 | G4cout << " E = "<< energyIntegr/MeV |
---|
| 1125 | << " MeV -> dE = " << deltaIntegr/MeV |
---|
| 1126 | << " MeV -> dE/dx = " << dedxValue/MeV*mm |
---|
| 1127 | << " MeV/mm -> dE/(dE/dx) = " << deltaIntegr / |
---|
| 1128 | dedxValue / mm |
---|
| 1129 | << " mm -> range = " << range / mm |
---|
| 1130 | << " mm " << G4endl; |
---|
| 1131 | #endif |
---|
| 1132 | } |
---|
| 1133 | |
---|
| 1134 | logEnergy += logDeltaEnergy; |
---|
| 1135 | |
---|
| 1136 | G4double energy = std::exp(logEnergy); |
---|
| 1137 | |
---|
| 1138 | energyRangeVector -> PutValues(i, energy, range); |
---|
| 1139 | |
---|
| 1140 | #ifdef PRINT_DEBUG_DETAILS |
---|
| 1141 | G4cout << "G4IonParametrisedLossModel::BuildRangeVector() bin = " |
---|
| 1142 | << i <<", E = " |
---|
| 1143 | << energy / MeV << " MeV, R = " |
---|
| 1144 | << range / mm << " mm" |
---|
| 1145 | << G4endl; |
---|
| 1146 | #endif |
---|
| 1147 | |
---|
| 1148 | } |
---|
| 1149 | |
---|
| 1150 | G4bool b; |
---|
| 1151 | |
---|
| 1152 | G4double lowerRangeEdge = |
---|
| 1153 | energyRangeVector -> GetValue(lowerEnergy, b); |
---|
| 1154 | G4double upperRangeEdge = |
---|
| 1155 | energyRangeVector -> GetValue(upperEnergy, b); |
---|
| 1156 | |
---|
| 1157 | G4LPhysicsFreeVector* rangeEnergyVector |
---|
| 1158 | = new G4LPhysicsFreeVector(nmbBins+1, |
---|
| 1159 | lowerRangeEdge, |
---|
| 1160 | upperRangeEdge); |
---|
| 1161 | rangeEnergyVector -> SetSpline(true); |
---|
| 1162 | |
---|
| 1163 | for(size_t i = 0; i < nmbBins+1; i++) { |
---|
| 1164 | G4double energy = energyRangeVector -> GetLowEdgeEnergy(i); |
---|
| 1165 | rangeEnergyVector -> |
---|
| 1166 | PutValues(i, energyRangeVector -> GetValue(energy, b), energy); |
---|
| 1167 | } |
---|
| 1168 | |
---|
| 1169 | #ifdef PRINT_DEBUG_TABLES |
---|
| 1170 | G4cout << *energyLossVector |
---|
| 1171 | << *energyRangeVector |
---|
| 1172 | << *rangeEnergyVector << G4endl; |
---|
| 1173 | #endif |
---|
| 1174 | |
---|
[1228] | 1175 | IonMatCouple ionMatCouple = std::make_pair(particle, matCutsCouple); |
---|
[1055] | 1176 | |
---|
[968] | 1177 | E[ionMatCouple] = energyRangeVector; |
---|
| 1178 | r[ionMatCouple] = rangeEnergyVector; |
---|
| 1179 | } |
---|
| 1180 | |
---|
[1055] | 1181 | // ######################################################################### |
---|
[968] | 1182 | |
---|
| 1183 | G4double G4IonParametrisedLossModel::ComputeLossForStep( |
---|
[1228] | 1184 | const G4MaterialCutsCouple* matCutsCouple, |
---|
[968] | 1185 | const G4ParticleDefinition* particle, |
---|
| 1186 | G4double kineticEnergy, |
---|
| 1187 | G4double stepLength) { |
---|
| 1188 | |
---|
| 1189 | G4double loss = 0.0; |
---|
| 1190 | |
---|
[1228] | 1191 | UpdateRangeCache(particle, matCutsCouple); |
---|
[968] | 1192 | |
---|
[1228] | 1193 | G4PhysicsVector* energyRange = rangeCacheEnergyRange; |
---|
| 1194 | G4PhysicsVector* rangeEnergy = rangeCacheRangeEnergy; |
---|
[968] | 1195 | |
---|
| 1196 | if(energyRange != 0 && rangeEnergy != 0) { |
---|
| 1197 | G4bool b; |
---|
| 1198 | |
---|
[1192] | 1199 | G4double lowerEnEdge = energyRange -> GetLowEdgeEnergy( 0 ); |
---|
| 1200 | G4double lowerRangeEdge = rangeEnergy -> GetLowEdgeEnergy( 0 ); |
---|
| 1201 | |
---|
[968] | 1202 | // Computing range for pre-step kinetic energy: |
---|
| 1203 | G4double range = energyRange -> GetValue(kineticEnergy, b); |
---|
| 1204 | |
---|
[1192] | 1205 | // Energy below vector boundary: |
---|
| 1206 | if(kineticEnergy < lowerEnEdge) { |
---|
| 1207 | |
---|
| 1208 | range = energyRange -> GetValue(lowerEnEdge, b); |
---|
| 1209 | range *= std::sqrt(kineticEnergy / lowerEnEdge); |
---|
| 1210 | } |
---|
| 1211 | |
---|
[968] | 1212 | #ifdef PRINT_DEBUG |
---|
| 1213 | G4cout << "G4IonParametrisedLossModel::ComputeLossForStep() range = " |
---|
| 1214 | << range / mm << " mm, step = " << stepLength / mm << " mm" |
---|
| 1215 | << G4endl; |
---|
| 1216 | #endif |
---|
| 1217 | |
---|
[1192] | 1218 | // Remaining range: |
---|
| 1219 | G4double remRange = range - stepLength; |
---|
| 1220 | |
---|
[968] | 1221 | // If range is smaller than step length, the loss is set to kinetic |
---|
| 1222 | // energy |
---|
[1192] | 1223 | if(remRange < 0.0) loss = kineticEnergy; |
---|
| 1224 | else if(remRange < lowerRangeEdge) { |
---|
| 1225 | |
---|
| 1226 | G4double ratio = remRange / lowerRangeEdge; |
---|
| 1227 | loss = kineticEnergy - ratio * ratio * lowerEnEdge; |
---|
| 1228 | } |
---|
[968] | 1229 | else { |
---|
| 1230 | |
---|
| 1231 | G4double energy = rangeEnergy -> GetValue(range - stepLength, b); |
---|
[1192] | 1232 | loss = kineticEnergy - energy; |
---|
[968] | 1233 | } |
---|
[1055] | 1234 | } |
---|
[968] | 1235 | |
---|
[1192] | 1236 | if(loss < 0.0) loss = 0.0; |
---|
| 1237 | |
---|
[1055] | 1238 | return loss; |
---|
| 1239 | } |
---|
[968] | 1240 | |
---|
[1055] | 1241 | // ######################################################################### |
---|
| 1242 | |
---|
| 1243 | G4bool G4IonParametrisedLossModel::AddDEDXTable( |
---|
| 1244 | const G4String& name, |
---|
| 1245 | G4VIonDEDXTable* table, |
---|
| 1246 | G4VIonDEDXScalingAlgorithm* algorithm) { |
---|
| 1247 | |
---|
| 1248 | if(table == 0) { |
---|
| 1249 | G4cerr << "G4IonParametrisedLossModel::AddDEDXTable() Cannot " |
---|
| 1250 | << " add table: Invalid pointer." |
---|
| 1251 | << G4endl; |
---|
| 1252 | |
---|
| 1253 | return false; |
---|
[968] | 1254 | } |
---|
| 1255 | |
---|
[1055] | 1256 | // Checking uniqueness of name |
---|
| 1257 | LossTableList::iterator iter = lossTableList.begin(); |
---|
| 1258 | LossTableList::iterator iter_end = lossTableList.end(); |
---|
| 1259 | |
---|
| 1260 | for(;iter != iter_end; iter++) { |
---|
| 1261 | G4String tableName = (*iter) -> GetName(); |
---|
| 1262 | |
---|
| 1263 | if(tableName == name) { |
---|
| 1264 | G4cerr << "G4IonParametrisedLossModel::AddDEDXTable() Cannot " |
---|
| 1265 | << " add table: Name already exists." |
---|
| 1266 | << G4endl; |
---|
| 1267 | |
---|
| 1268 | return false; |
---|
| 1269 | } |
---|
| 1270 | } |
---|
| 1271 | |
---|
| 1272 | G4VIonDEDXScalingAlgorithm* scalingAlgorithm = algorithm; |
---|
| 1273 | if(scalingAlgorithm == 0) |
---|
| 1274 | scalingAlgorithm = new G4VIonDEDXScalingAlgorithm; |
---|
| 1275 | |
---|
| 1276 | G4IonDEDXHandler* handler = |
---|
| 1277 | new G4IonDEDXHandler(table, scalingAlgorithm, name); |
---|
| 1278 | |
---|
| 1279 | lossTableList.push_front(handler); |
---|
| 1280 | |
---|
| 1281 | return true; |
---|
[968] | 1282 | } |
---|
[1055] | 1283 | |
---|
| 1284 | // ######################################################################### |
---|
| 1285 | |
---|
| 1286 | G4bool G4IonParametrisedLossModel::RemoveDEDXTable( |
---|
| 1287 | const G4String& name) { |
---|
| 1288 | |
---|
| 1289 | LossTableList::iterator iter = lossTableList.begin(); |
---|
| 1290 | LossTableList::iterator iter_end = lossTableList.end(); |
---|
| 1291 | |
---|
| 1292 | for(;iter != iter_end; iter++) { |
---|
| 1293 | G4String tableName = (*iter) -> GetName(); |
---|
| 1294 | |
---|
| 1295 | if(tableName == name) { |
---|
| 1296 | delete (*iter); |
---|
| 1297 | |
---|
[1192] | 1298 | // Remove from table list |
---|
[1055] | 1299 | lossTableList.erase(iter); |
---|
[1192] | 1300 | |
---|
| 1301 | // Range vs energy and energy vs range vectors are cleared |
---|
| 1302 | RangeEnergyTable::iterator iterRange = r.begin(); |
---|
| 1303 | RangeEnergyTable::iterator iterRange_end = r.end(); |
---|
| 1304 | |
---|
| 1305 | for(;iterRange != iterRange_end; iterRange++) |
---|
| 1306 | delete iterRange -> second; |
---|
| 1307 | r.clear(); |
---|
| 1308 | |
---|
| 1309 | EnergyRangeTable::iterator iterEnergy = E.begin(); |
---|
| 1310 | EnergyRangeTable::iterator iterEnergy_end = E.end(); |
---|
| 1311 | |
---|
| 1312 | for(;iterEnergy != iterEnergy_end; iterEnergy++) |
---|
| 1313 | delete iterEnergy -> second; |
---|
| 1314 | E.clear(); |
---|
| 1315 | |
---|
[1055] | 1316 | return true; |
---|
| 1317 | } |
---|
| 1318 | } |
---|
| 1319 | |
---|
| 1320 | return false; |
---|
| 1321 | } |
---|
| 1322 | |
---|
| 1323 | // ######################################################################### |
---|
| 1324 | |
---|
[1192] | 1325 | void G4IonParametrisedLossModel::DeactivateICRU73Scaling() { |
---|
| 1326 | |
---|
| 1327 | RemoveDEDXTable("ICRU73"); |
---|
| 1328 | AddDEDXTable("ICRU73", new G4IonStoppingData("ion_stopping_data/icru73")); |
---|
| 1329 | } |
---|
| 1330 | |
---|
| 1331 | // ######################################################################### |
---|