[819] | 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: G4VEnergyLoss.cc,v 1.46 2006/06/29 19:55:21 gunter Exp $ |
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[1228] | 28 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 29 | // |
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| 30 | |
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| 31 | // -------------------------------------------------------------- |
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| 32 | // |
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| 33 | // bug fixed in fluct., L.Urban 01/02/01 |
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| 34 | // bug fixed in fluct., L.Urban 26/05/00 |
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| 35 | // bug fixed in fluct., L.Urban 22/11/00 |
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| 36 | // bugfix in fluct. |
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| 37 | // (some variables are doubles instead of ints now),L.Urban 23/03/01 |
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| 38 | // 18/05/01 V.Ivanchenko Clean up againist Linux ANSI compilation |
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| 39 | // 17-09-01 migration of Materials to pure STL (mma) |
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| 40 | // 26-10-01 static inline functions moved from .hh file (mma) |
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| 41 | // 08.11.01 some static methods,data members are not static L.Urban |
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| 42 | // 11.02.02 subSecFlag = false --> No sucutoff generation (mma) |
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| 43 | // 14.02.02 initial value of data member finalRange has been changed L.Urban |
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| 44 | // 26.02.02 initial value of data member finalRange = 1 mm (mma) |
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| 45 | // 21.07.02 V.Ivanchenko Fix at low energies - if tmax below ionisation |
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| 46 | // potential then only Gaussian fluctuations are sampled. |
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| 47 | // 15.01.03 Migrade to cut per region (V.Ivanchenko) |
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| 48 | // 05.02.03 Minor fix for several region case (V.Ivanchenko) |
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| 49 | // 25.03.03 add finalRangeRequested (mma) |
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| 50 | // |
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| 51 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 52 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 53 | |
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| 54 | #include "G4VEnergyLoss.hh" |
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| 55 | #include "G4EnergyLossMessenger.hh" |
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| 56 | #include "G4ProductionCutsTable.hh" |
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| 57 | #include "G4LossTableManager.hh" |
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| 58 | |
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| 59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 60 | |
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| 61 | G4bool G4VEnergyLoss::rndmStepFlag = false; |
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| 62 | G4bool G4VEnergyLoss::EnlossFlucFlag = true; |
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| 63 | |
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| 64 | G4bool G4VEnergyLoss::subSecFlag = false; |
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| 65 | G4double G4VEnergyLoss::MinDeltaCutInRange = 0.100*mm; |
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| 66 | G4double* G4VEnergyLoss::MinDeltaEnergy = 0; |
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| 67 | G4bool* G4VEnergyLoss::LowerLimitForced = 0; |
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| 68 | G4bool G4VEnergyLoss::setMinDeltaCutInRange = false; |
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| 69 | |
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| 70 | G4double G4VEnergyLoss::dRoverRange = 20*perCent; |
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| 71 | G4double G4VEnergyLoss::finalRange = 1*mm; |
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| 72 | G4double G4VEnergyLoss::finalRangeRequested = -1*mm; |
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| 73 | G4double G4VEnergyLoss::c1lim = dRoverRange; |
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| 74 | G4double G4VEnergyLoss::c2lim = 2.*(1.-dRoverRange)*finalRange; |
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| 75 | G4double G4VEnergyLoss::c3lim = -(1.-dRoverRange)*finalRange*finalRange; |
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| 76 | |
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| 77 | G4EnergyLossMessenger* G4VEnergyLoss::ELossMessenger = 0; |
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| 78 | |
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| 79 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 80 | |
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| 81 | G4VEnergyLoss::G4VEnergyLoss() |
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| 82 | :G4VContinuousDiscreteProcess("No Name Loss Process"), |
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| 83 | lastMaterial(NULL), |
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| 84 | nmaxCont1(4), |
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| 85 | nmaxCont2(16) |
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| 86 | { |
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| 87 | G4Exception("G4VEnergyLoss:: default constructor is called"); |
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| 88 | } |
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| 89 | |
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| 90 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 91 | |
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| 92 | G4VEnergyLoss::G4VEnergyLoss(const G4String& aName , G4ProcessType aType) |
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| 93 | : G4VContinuousDiscreteProcess(aName, aType), |
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| 94 | lastMaterial(NULL), |
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| 95 | nmaxCont1(4), |
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| 96 | nmaxCont2(16) |
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| 97 | { |
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| 98 | //create (only once) EnergyLoss messenger |
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| 99 | // if(!ELossMessenger) ELossMessenger = new G4EnergyLossMessenger(); |
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| 100 | if(!ELossMessenger) ELossMessenger = G4LossTableManager::Instance()->GetMessenger(); |
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| 101 | } |
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| 102 | |
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| 103 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 104 | |
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| 105 | G4VEnergyLoss::~G4VEnergyLoss() |
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| 106 | {} |
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| 107 | |
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| 108 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 109 | |
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| 110 | G4VEnergyLoss::G4VEnergyLoss(G4VEnergyLoss& right) |
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| 111 | : G4VContinuousDiscreteProcess(right), |
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| 112 | lastMaterial(NULL), |
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| 113 | nmaxCont1(4), |
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| 114 | nmaxCont2(16) |
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| 115 | {} |
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| 116 | |
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| 117 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 118 | |
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| 119 | void G4VEnergyLoss::SetRndmStep(G4bool value) {rndmStepFlag = value;} |
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| 120 | |
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| 121 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 122 | |
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| 123 | void G4VEnergyLoss::SetEnlossFluc(G4bool value) {EnlossFlucFlag = value;} |
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| 124 | |
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| 125 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 126 | |
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| 127 | void G4VEnergyLoss::SetSubSec(G4bool value) {subSecFlag = value;} |
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| 128 | |
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| 129 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 130 | |
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| 131 | void G4VEnergyLoss::SetMinDeltaCutInRange(G4double value) |
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| 132 | {MinDeltaCutInRange = value; setMinDeltaCutInRange = true;} |
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| 133 | |
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| 134 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 135 | |
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| 136 | void G4VEnergyLoss::SetStepFunction(G4double c1, G4double c2) |
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| 137 | { |
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| 138 | dRoverRange = c1; finalRangeRequested = c2; |
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| 139 | c1lim=dRoverRange; |
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| 140 | c2lim=2.*(1-dRoverRange)*finalRangeRequested; |
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| 141 | c3lim=-(1.-dRoverRange)*finalRangeRequested*finalRangeRequested; |
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| 142 | } |
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| 143 | |
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| 144 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 145 | |
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| 146 | G4PhysicsTable* G4VEnergyLoss::BuildRangeTable( |
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| 147 | G4PhysicsTable* theDEDXTable,G4PhysicsTable* theRangeTable, |
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| 148 | G4double LowestKineticEnergy,G4double HighestKineticEnergy,G4int TotBin) |
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| 149 | // Build range table from the energy loss table |
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| 150 | { |
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| 151 | size_t numOfMaterials = theDEDXTable->length(); |
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| 152 | |
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| 153 | if(theRangeTable) |
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| 154 | { theRangeTable->clearAndDestroy(); |
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| 155 | delete theRangeTable; } |
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| 156 | theRangeTable = new G4PhysicsTable(numOfMaterials); |
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| 157 | |
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| 158 | // loop for materials |
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| 159 | |
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| 160 | for (size_t J=0; J<numOfMaterials; J++) |
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| 161 | { |
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| 162 | G4PhysicsLogVector* aVector; |
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| 163 | aVector = new G4PhysicsLogVector(LowestKineticEnergy, |
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| 164 | HighestKineticEnergy,TotBin); |
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| 165 | |
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| 166 | BuildRangeVector(theDEDXTable,LowestKineticEnergy,HighestKineticEnergy, |
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| 167 | TotBin,J,aVector); |
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| 168 | theRangeTable->insert(aVector); |
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| 169 | } |
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| 170 | return theRangeTable ; |
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| 171 | } |
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| 172 | |
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| 173 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 174 | |
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| 175 | void G4VEnergyLoss::BuildRangeVector(G4PhysicsTable* theDEDXTable, |
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| 176 | G4double,G4double HighestKineticEnergy,G4int TotBin, |
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| 177 | G4int materialIndex,G4PhysicsLogVector* rangeVector) |
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| 178 | // create range vector for a material |
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| 179 | { |
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| 180 | G4int nbin=100,i; |
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| 181 | G4bool isOut; |
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| 182 | |
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| 183 | const G4double small = 1.e-6 ; |
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| 184 | const G4double masslimit = 0.52*MeV ; |
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| 185 | |
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| 186 | G4double tlim=2.*MeV,t1=0.1*MeV,t2=0.025*MeV ; |
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| 187 | G4double tlime=0.2*keV,factor=2.*electron_mass_c2 ; |
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| 188 | G4double loss1,loss2,ca,cb,cba ; |
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| 189 | G4double losslim,clim ; |
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| 190 | G4double taulim,rangelim,ltaulim,ltaumax, |
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| 191 | LowEdgeEnergy,tau,Value,tau1,sqtau1 ; |
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| 192 | G4double oldValue,tauold ; |
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| 193 | |
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| 194 | G4PhysicsVector* physicsVector= (*theDEDXTable)[materialIndex]; |
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| 195 | |
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| 196 | // cure 'accidental' 0. dE/dx vales first ..... |
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| 197 | G4double lossmin = +1.e10 ; |
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| 198 | for (G4int i1=0; i1<TotBin; i1++) |
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| 199 | { |
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| 200 | LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(i1) ; |
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| 201 | Value = physicsVector->GetValue(LowEdgeEnergy,isOut); |
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| 202 | if((Value < lossmin)&&(Value > 0.)) |
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| 203 | lossmin = Value ; |
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| 204 | } |
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| 205 | for (G4int i2=0; i2<TotBin; i2++) |
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| 206 | { |
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| 207 | LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(i2) ; |
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| 208 | Value = physicsVector->GetValue(LowEdgeEnergy,isOut); |
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| 209 | if(Value < lossmin) |
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| 210 | physicsVector->PutValue(i2,small*lossmin) ; |
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| 211 | } |
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| 212 | |
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| 213 | // low energy part first... |
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| 214 | // heavy particle |
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| 215 | if(ParticleMass > masslimit) |
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| 216 | { |
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| 217 | loss1 = physicsVector->GetValue(t1,isOut); |
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| 218 | loss2 = physicsVector->GetValue(t2,isOut); |
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| 219 | tau1 = t1/ParticleMass ; |
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| 220 | sqtau1 = std::sqrt(tau1) ; |
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| 221 | ca = (4.*loss2-loss1)/sqtau1 ; |
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| 222 | cb = (2.*loss1-4.*loss2)/tau1 ; |
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| 223 | cba = cb/ca ; |
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| 224 | taulim = tlim/ParticleMass ; |
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| 225 | ltaulim = std::log(taulim) ; |
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| 226 | ltaumax = std::log(HighestKineticEnergy/ParticleMass) ; |
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| 227 | |
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| 228 | i=-1; |
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| 229 | oldValue = 0. ; |
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| 230 | |
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| 231 | do |
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| 232 | { |
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| 233 | i += 1 ; |
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| 234 | LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(i); |
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| 235 | tau = LowEdgeEnergy/ParticleMass; |
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| 236 | if ( tau <= tau1 ) |
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| 237 | { |
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| 238 | Value = 2.*ParticleMass*std::log(1.+cba*std::sqrt(tau))/cb ; |
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| 239 | } |
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| 240 | else |
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| 241 | { |
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| 242 | Value = 2.*ParticleMass*std::log(1.+cba*sqtau1)/cb ; |
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| 243 | if(tau<=taulim) |
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| 244 | { |
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| 245 | taulow = tau1 ; |
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| 246 | tauhigh = tau ; |
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| 247 | Value += RangeIntLin(physicsVector,nbin); |
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| 248 | } |
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| 249 | else |
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| 250 | { |
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| 251 | |
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| 252 | taulow = tau1 ; |
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| 253 | tauhigh = taulim ; |
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| 254 | Value += RangeIntLin(physicsVector,nbin) ; |
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| 255 | ltaulow = ltaulim ; |
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| 256 | ltauhigh = std::log(tau) ; |
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| 257 | Value += RangeIntLog(physicsVector,nbin); |
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| 258 | } |
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| 259 | } |
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| 260 | |
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| 261 | rangeVector->PutValue(i,Value); |
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| 262 | oldValue = Value ; |
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| 263 | tauold = tau ; |
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| 264 | } while (tau<=taulim) ; |
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| 265 | } |
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| 266 | else |
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| 267 | // electron/positron |
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| 268 | { |
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| 269 | losslim = physicsVector->GetValue(tlime,isOut) ; |
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| 270 | |
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| 271 | taulim = tlime/electron_mass_c2; |
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| 272 | clim = losslim; |
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| 273 | ltaulim = std::log(taulim); |
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| 274 | ltaumax = std::log(HighestKineticEnergy/electron_mass_c2); |
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| 275 | |
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| 276 | i=-1; |
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| 277 | oldValue = 0.; |
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| 278 | |
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| 279 | do |
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| 280 | { |
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| 281 | i += 1 ; |
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| 282 | LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(i); |
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| 283 | tau = LowEdgeEnergy/electron_mass_c2; |
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| 284 | if (tau <= taulim) Value = factor*std::sqrt(tau*taulim)/clim; |
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| 285 | else { |
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| 286 | rangelim = factor*taulim/losslim ; |
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| 287 | ltaulow = std::log(taulim); |
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| 288 | ltauhigh = std::log(tau); |
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| 289 | Value = rangelim+RangeIntLog(physicsVector,nbin); |
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| 290 | } |
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| 291 | rangeVector->PutValue(i,Value); |
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| 292 | oldValue = Value; |
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| 293 | tauold = tau; |
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| 294 | |
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| 295 | } while (tau<=taulim); |
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| 296 | |
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| 297 | } |
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| 298 | |
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| 299 | i += 1 ; |
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| 300 | for (G4int j=i; j<TotBin; j++) |
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| 301 | { |
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| 302 | LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(j); |
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| 303 | tau = LowEdgeEnergy/ParticleMass; |
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| 304 | ltaulow = std::log(tauold); |
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| 305 | ltauhigh = std::log(tau); |
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| 306 | Value = oldValue+RangeIntLog(physicsVector,nbin); |
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| 307 | rangeVector->PutValue(j,Value); |
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| 308 | oldValue = Value ; |
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| 309 | |
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| 310 | tauold = tau ; |
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| 311 | } |
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| 312 | } |
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| 313 | |
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| 314 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 315 | |
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| 316 | G4double G4VEnergyLoss::RangeIntLin(G4PhysicsVector* physicsVector, |
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| 317 | G4int nbin) |
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| 318 | // num. integration, linear binning |
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| 319 | { |
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| 320 | G4double dtau,Value,taui,ti,lossi,ci; |
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| 321 | G4bool isOut; |
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| 322 | dtau = (tauhigh-taulow)/nbin; |
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| 323 | Value = 0.; |
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| 324 | |
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| 325 | for (G4int i=0; i<=nbin; i++) |
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| 326 | { |
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| 327 | taui = taulow + dtau*i ; |
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| 328 | ti = ParticleMass*taui; |
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| 329 | lossi = physicsVector->GetValue(ti,isOut); |
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| 330 | if(i==0) |
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| 331 | ci=0.5; |
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| 332 | else |
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| 333 | { |
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| 334 | if(i<nbin) |
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| 335 | ci=1.; |
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| 336 | else |
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| 337 | ci=0.5; |
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| 338 | } |
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| 339 | Value += ci/lossi; |
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| 340 | } |
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| 341 | Value *= ParticleMass*dtau; |
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| 342 | return Value; |
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| 343 | } |
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| 344 | |
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| 345 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 346 | |
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| 347 | G4double G4VEnergyLoss::RangeIntLog(G4PhysicsVector* physicsVector, |
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| 348 | G4int nbin) |
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| 349 | // num. integration, logarithmic binning |
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| 350 | { |
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| 351 | G4double ltt,dltau,Value,ui,taui,ti,lossi,ci; |
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| 352 | G4bool isOut; |
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| 353 | ltt = ltauhigh-ltaulow; |
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| 354 | dltau = ltt/nbin; |
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| 355 | Value = 0.; |
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| 356 | |
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| 357 | for (G4int i=0; i<=nbin; i++) |
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| 358 | { |
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| 359 | ui = ltaulow+dltau*i; |
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| 360 | taui = std::exp(ui); |
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| 361 | ti = ParticleMass*taui; |
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| 362 | lossi = physicsVector->GetValue(ti,isOut); |
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| 363 | if(i==0) |
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| 364 | ci=0.5; |
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| 365 | else |
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| 366 | { |
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| 367 | if(i<nbin) |
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| 368 | ci=1.; |
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| 369 | else |
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| 370 | ci=0.5; |
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| 371 | } |
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| 372 | Value += ci*taui/lossi; |
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| 373 | } |
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| 374 | Value *= ParticleMass*dltau; |
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| 375 | return Value; |
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| 376 | } |
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| 377 | |
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| 378 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 379 | |
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| 380 | G4PhysicsTable* G4VEnergyLoss::BuildLabTimeTable(G4PhysicsTable* theDEDXTable, |
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| 381 | G4PhysicsTable* theLabTimeTable, |
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| 382 | G4double LowestKineticEnergy, |
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| 383 | G4double HighestKineticEnergy,G4int TotBin) |
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| 384 | |
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| 385 | { |
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| 386 | size_t numOfMaterials = theDEDXTable->length(); |
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| 387 | |
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| 388 | if(theLabTimeTable) |
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| 389 | { theLabTimeTable->clearAndDestroy(); |
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| 390 | delete theLabTimeTable; } |
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| 391 | theLabTimeTable = new G4PhysicsTable(numOfMaterials); |
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| 392 | |
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| 393 | |
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| 394 | for (size_t J=0; J<numOfMaterials; J++) |
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| 395 | { |
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| 396 | G4PhysicsLogVector* aVector; |
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| 397 | |
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| 398 | aVector = new G4PhysicsLogVector(LowestKineticEnergy, |
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| 399 | HighestKineticEnergy,TotBin); |
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| 400 | |
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| 401 | BuildLabTimeVector(theDEDXTable, |
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| 402 | LowestKineticEnergy,HighestKineticEnergy,TotBin,J,aVector); |
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| 403 | theLabTimeTable->insert(aVector); |
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| 404 | |
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| 405 | |
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| 406 | } |
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| 407 | return theLabTimeTable ; |
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| 408 | } |
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| 409 | |
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| 410 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 411 | |
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| 412 | G4PhysicsTable* G4VEnergyLoss::BuildProperTimeTable(G4PhysicsTable* theDEDXTable, |
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| 413 | G4PhysicsTable* theProperTimeTable, |
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| 414 | G4double LowestKineticEnergy, |
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| 415 | G4double HighestKineticEnergy,G4int TotBin) |
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| 416 | |
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| 417 | { |
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| 418 | size_t numOfMaterials = theDEDXTable->length(); |
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| 419 | |
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| 420 | if(theProperTimeTable) |
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| 421 | { theProperTimeTable->clearAndDestroy(); |
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| 422 | delete theProperTimeTable; } |
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| 423 | theProperTimeTable = new G4PhysicsTable(numOfMaterials); |
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| 424 | |
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| 425 | |
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| 426 | for (size_t J=0; J<numOfMaterials; J++) |
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| 427 | { |
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| 428 | G4PhysicsLogVector* aVector; |
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| 429 | |
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| 430 | aVector = new G4PhysicsLogVector(LowestKineticEnergy, |
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| 431 | HighestKineticEnergy,TotBin); |
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| 432 | |
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| 433 | BuildProperTimeVector(theDEDXTable, |
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| 434 | LowestKineticEnergy,HighestKineticEnergy,TotBin,J,aVector); |
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| 435 | theProperTimeTable->insert(aVector); |
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| 436 | |
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| 437 | |
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| 438 | } |
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| 439 | return theProperTimeTable ; |
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| 440 | } |
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| 441 | |
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| 442 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 443 | |
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| 444 | void G4VEnergyLoss::BuildLabTimeVector(G4PhysicsTable* theDEDXTable, |
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| 445 | G4double, |
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| 446 | G4double HighestKineticEnergy,G4int TotBin, |
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| 447 | G4int materialIndex, G4PhysicsLogVector* timeVector) |
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| 448 | // create lab time vector for a material |
---|
| 449 | { |
---|
| 450 | |
---|
| 451 | G4int nbin=100; |
---|
| 452 | G4bool isOut; |
---|
| 453 | G4double tlim=5.*keV,parlowen=0.4,ppar=0.5-parlowen ; |
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| 454 | G4double losslim,clim,taulim,timelim,ltaulim,ltaumax, |
---|
| 455 | LowEdgeEnergy,tau,Value ; |
---|
| 456 | |
---|
| 457 | G4PhysicsVector* physicsVector= (*theDEDXTable)[materialIndex]; |
---|
| 458 | |
---|
| 459 | // low energy part first... |
---|
| 460 | losslim = physicsVector->GetValue(tlim,isOut); |
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| 461 | taulim=tlim/ParticleMass ; |
---|
| 462 | clim=std::sqrt(ParticleMass*tlim/2.)/(c_light*losslim*ppar) ; |
---|
| 463 | ltaulim = std::log(taulim); |
---|
| 464 | ltaumax = std::log(HighestKineticEnergy/ParticleMass) ; |
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| 465 | |
---|
| 466 | G4int i=-1; |
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| 467 | G4double oldValue = 0. ; |
---|
| 468 | G4double tauold ; |
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| 469 | do |
---|
| 470 | { |
---|
| 471 | i += 1 ; |
---|
| 472 | LowEdgeEnergy = timeVector->GetLowEdgeEnergy(i); |
---|
| 473 | tau = LowEdgeEnergy/ParticleMass ; |
---|
| 474 | if ( tau <= taulim ) |
---|
| 475 | { |
---|
| 476 | Value = clim*std::exp(ppar*std::log(tau/taulim)) ; |
---|
| 477 | } |
---|
| 478 | else |
---|
| 479 | { |
---|
| 480 | timelim=clim ; |
---|
| 481 | ltaulow = std::log(taulim); |
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| 482 | ltauhigh = std::log(tau); |
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| 483 | Value = timelim+LabTimeIntLog(physicsVector,nbin); |
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| 484 | } |
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| 485 | timeVector->PutValue(i,Value); |
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| 486 | oldValue = Value ; |
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| 487 | tauold = tau ; |
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| 488 | } while (tau<=taulim) ; |
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| 489 | i += 1 ; |
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| 490 | for (G4int j=i; j<TotBin; j++) |
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| 491 | { |
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| 492 | LowEdgeEnergy = timeVector->GetLowEdgeEnergy(j); |
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| 493 | tau = LowEdgeEnergy/ParticleMass ; |
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| 494 | ltaulow = std::log(tauold); |
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| 495 | ltauhigh = std::log(tau); |
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| 496 | Value = oldValue+LabTimeIntLog(physicsVector,nbin); |
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| 497 | timeVector->PutValue(j,Value); |
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| 498 | oldValue = Value ; |
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| 499 | tauold = tau ; |
---|
| 500 | } |
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| 501 | } |
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| 502 | |
---|
| 503 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 504 | |
---|
| 505 | void G4VEnergyLoss::BuildProperTimeVector(G4PhysicsTable* theDEDXTable, |
---|
| 506 | G4double, |
---|
| 507 | G4double HighestKineticEnergy,G4int TotBin, |
---|
| 508 | G4int materialIndex, G4PhysicsLogVector* timeVector) |
---|
| 509 | // create proper time vector for a material |
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| 510 | { |
---|
| 511 | G4int nbin=100; |
---|
| 512 | G4bool isOut; |
---|
| 513 | G4double tlim=5.*keV,parlowen=0.4,ppar=0.5-parlowen ; |
---|
| 514 | G4double losslim,clim,taulim,timelim,ltaulim,ltaumax, |
---|
| 515 | LowEdgeEnergy,tau,Value ; |
---|
| 516 | |
---|
| 517 | G4PhysicsVector* physicsVector= (*theDEDXTable)[materialIndex]; |
---|
| 518 | |
---|
| 519 | // low energy part first... |
---|
| 520 | losslim = physicsVector->GetValue(tlim,isOut); |
---|
| 521 | taulim=tlim/ParticleMass ; |
---|
| 522 | clim=std::sqrt(ParticleMass*tlim/2.)/(c_light*losslim*ppar) ; |
---|
| 523 | ltaulim = std::log(taulim); |
---|
| 524 | ltaumax = std::log(HighestKineticEnergy/ParticleMass) ; |
---|
| 525 | |
---|
| 526 | G4int i=-1; |
---|
| 527 | G4double oldValue = 0. ; |
---|
| 528 | G4double tauold ; |
---|
| 529 | do |
---|
| 530 | { |
---|
| 531 | i += 1 ; |
---|
| 532 | LowEdgeEnergy = timeVector->GetLowEdgeEnergy(i); |
---|
| 533 | tau = LowEdgeEnergy/ParticleMass ; |
---|
| 534 | if ( tau <= taulim ) |
---|
| 535 | { |
---|
| 536 | Value = clim*std::exp(ppar*std::log(tau/taulim)) ; |
---|
| 537 | } |
---|
| 538 | else |
---|
| 539 | { |
---|
| 540 | timelim=clim ; |
---|
| 541 | ltaulow = std::log(taulim); |
---|
| 542 | ltauhigh = std::log(tau); |
---|
| 543 | Value = timelim+ProperTimeIntLog(physicsVector,nbin); |
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| 544 | } |
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| 545 | timeVector->PutValue(i,Value); |
---|
| 546 | oldValue = Value ; |
---|
| 547 | tauold = tau ; |
---|
| 548 | } while (tau<=taulim) ; |
---|
| 549 | i += 1 ; |
---|
| 550 | for (G4int j=i; j<TotBin; j++) |
---|
| 551 | { |
---|
| 552 | LowEdgeEnergy = timeVector->GetLowEdgeEnergy(j); |
---|
| 553 | tau = LowEdgeEnergy/ParticleMass ; |
---|
| 554 | ltaulow = std::log(tauold); |
---|
| 555 | ltauhigh = std::log(tau); |
---|
| 556 | Value = oldValue+ProperTimeIntLog(physicsVector,nbin); |
---|
| 557 | timeVector->PutValue(j,Value); |
---|
| 558 | oldValue = Value ; |
---|
| 559 | tauold = tau ; |
---|
| 560 | } |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 564 | |
---|
| 565 | G4double G4VEnergyLoss::LabTimeIntLog(G4PhysicsVector* physicsVector, |
---|
| 566 | G4int nbin) |
---|
| 567 | // num. integration, logarithmic binning |
---|
| 568 | { |
---|
| 569 | G4double ltt,dltau,Value,ui,taui,ti,lossi,ci; |
---|
| 570 | G4bool isOut; |
---|
| 571 | ltt = ltauhigh-ltaulow; |
---|
| 572 | dltau = ltt/nbin; |
---|
| 573 | Value = 0.; |
---|
| 574 | |
---|
| 575 | for (G4int i=0; i<=nbin; i++) |
---|
| 576 | { |
---|
| 577 | ui = ltaulow+dltau*i; |
---|
| 578 | taui = std::exp(ui); |
---|
| 579 | ti = ParticleMass*taui; |
---|
| 580 | lossi = physicsVector->GetValue(ti,isOut); |
---|
| 581 | if(i==0) |
---|
| 582 | ci=0.5; |
---|
| 583 | else |
---|
| 584 | { |
---|
| 585 | if(i<nbin) |
---|
| 586 | ci=1.; |
---|
| 587 | else |
---|
| 588 | ci=0.5; |
---|
| 589 | } |
---|
| 590 | Value += ci*taui*(ti+ParticleMass)/(std::sqrt(ti*(ti+2.*ParticleMass))*lossi); |
---|
| 591 | } |
---|
| 592 | Value *= ParticleMass*dltau/c_light; |
---|
| 593 | return Value; |
---|
| 594 | } |
---|
| 595 | |
---|
| 596 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 597 | |
---|
| 598 | G4double G4VEnergyLoss::ProperTimeIntLog(G4PhysicsVector* physicsVector, |
---|
| 599 | G4int nbin) |
---|
| 600 | // num. integration, logarithmic binning |
---|
| 601 | { |
---|
| 602 | G4double ltt,dltau,Value,ui,taui,ti,lossi,ci; |
---|
| 603 | G4bool isOut; |
---|
| 604 | ltt = ltauhigh-ltaulow; |
---|
| 605 | dltau = ltt/nbin; |
---|
| 606 | Value = 0.; |
---|
| 607 | |
---|
| 608 | for (G4int i=0; i<=nbin; i++) |
---|
| 609 | { |
---|
| 610 | ui = ltaulow+dltau*i; |
---|
| 611 | taui = std::exp(ui); |
---|
| 612 | ti = ParticleMass*taui; |
---|
| 613 | lossi = physicsVector->GetValue(ti,isOut); |
---|
| 614 | if(i==0) |
---|
| 615 | ci=0.5; |
---|
| 616 | else |
---|
| 617 | { |
---|
| 618 | if(i<nbin) |
---|
| 619 | ci=1.; |
---|
| 620 | else |
---|
| 621 | ci=0.5; |
---|
| 622 | } |
---|
| 623 | Value += ci*taui*ParticleMass/(std::sqrt(ti*(ti+2.*ParticleMass))*lossi); |
---|
| 624 | } |
---|
| 625 | Value *= ParticleMass*dltau/c_light; |
---|
| 626 | return Value; |
---|
| 627 | } |
---|
| 628 | |
---|
| 629 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 630 | |
---|
| 631 | G4PhysicsTable* G4VEnergyLoss::BuildInverseRangeTable(G4PhysicsTable* theRangeTable, |
---|
| 632 | G4PhysicsTable* theRangeCoeffATable, |
---|
| 633 | G4PhysicsTable* theRangeCoeffBTable, |
---|
| 634 | G4PhysicsTable* theRangeCoeffCTable, |
---|
| 635 | G4PhysicsTable* theInverseRangeTable, |
---|
| 636 | G4double LowestKineticEnergy, |
---|
| 637 | G4double HighestKineticEnergy,G4int TotBin) |
---|
| 638 | // Build inverse table of the range table |
---|
| 639 | { |
---|
| 640 | G4double SmallestRange,BiggestRange ; |
---|
| 641 | G4bool isOut ; |
---|
| 642 | size_t numOfMaterials = theRangeTable->length(); |
---|
| 643 | |
---|
| 644 | if(theInverseRangeTable) |
---|
| 645 | { theInverseRangeTable->clearAndDestroy(); |
---|
| 646 | delete theInverseRangeTable; } |
---|
| 647 | theInverseRangeTable = new G4PhysicsTable(numOfMaterials); |
---|
| 648 | |
---|
| 649 | // loop for materials |
---|
| 650 | for (size_t J=0; J<numOfMaterials; J++) |
---|
| 651 | { |
---|
| 652 | SmallestRange = (*theRangeTable)(J)-> |
---|
| 653 | GetValue(LowestKineticEnergy,isOut) ; |
---|
| 654 | BiggestRange = (*theRangeTable)(J)-> |
---|
| 655 | GetValue(HighestKineticEnergy,isOut) ; |
---|
| 656 | G4PhysicsLogVector* aVector; |
---|
| 657 | aVector = new G4PhysicsLogVector(SmallestRange, |
---|
| 658 | BiggestRange,TotBin); |
---|
| 659 | |
---|
| 660 | InvertRangeVector(theRangeTable, |
---|
| 661 | theRangeCoeffATable, |
---|
| 662 | theRangeCoeffBTable, |
---|
| 663 | theRangeCoeffCTable, |
---|
| 664 | LowestKineticEnergy,HighestKineticEnergy,TotBin,J, aVector); |
---|
| 665 | |
---|
| 666 | theInverseRangeTable->insert(aVector); |
---|
| 667 | } |
---|
| 668 | return theInverseRangeTable ; |
---|
| 669 | } |
---|
| 670 | |
---|
| 671 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 672 | |
---|
| 673 | void G4VEnergyLoss::InvertRangeVector(G4PhysicsTable* theRangeTable, |
---|
| 674 | G4PhysicsTable* theRangeCoeffATable, |
---|
| 675 | G4PhysicsTable* theRangeCoeffBTable, |
---|
| 676 | G4PhysicsTable* theRangeCoeffCTable, |
---|
| 677 | G4double LowestKineticEnergy, |
---|
| 678 | G4double HighestKineticEnergy,G4int TotBin, |
---|
| 679 | G4int materialIndex,G4PhysicsLogVector* aVector) |
---|
| 680 | // invert range vector for a material |
---|
| 681 | { |
---|
| 682 | G4double LowEdgeRange,A,B,C,discr,KineticEnergy ; |
---|
| 683 | G4double RTable = std::exp(std::log(HighestKineticEnergy/LowestKineticEnergy)/TotBin) ; |
---|
| 684 | G4double Tbin = LowestKineticEnergy/RTable ; |
---|
| 685 | G4double rangebin = 0.0 ; |
---|
| 686 | G4int binnumber = -1 ; |
---|
| 687 | G4bool isOut ; |
---|
| 688 | |
---|
| 689 | //loop for range values |
---|
| 690 | for( G4int i=0; i<TotBin; i++) |
---|
| 691 | { |
---|
| 692 | LowEdgeRange = aVector->GetLowEdgeEnergy(i) ; //i.e. GetLowEdgeValue(i) |
---|
| 693 | if( rangebin < LowEdgeRange ) |
---|
| 694 | { |
---|
| 695 | do |
---|
| 696 | { |
---|
| 697 | binnumber += 1 ; |
---|
| 698 | Tbin *= RTable ; |
---|
| 699 | rangebin = (*theRangeTable)(materialIndex)->GetValue(Tbin,isOut) ; |
---|
| 700 | } |
---|
| 701 | while ((rangebin < LowEdgeRange) && (binnumber < TotBin )) ; |
---|
| 702 | } |
---|
| 703 | |
---|
| 704 | if(binnumber == 0) |
---|
| 705 | KineticEnergy = LowestKineticEnergy ; |
---|
| 706 | else if(binnumber == TotBin-1) |
---|
| 707 | KineticEnergy = HighestKineticEnergy ; |
---|
| 708 | else |
---|
| 709 | { |
---|
| 710 | A = (*(*theRangeCoeffATable)(materialIndex))(binnumber-1) ; |
---|
| 711 | B = (*(*theRangeCoeffBTable)(materialIndex))(binnumber-1) ; |
---|
| 712 | C = (*(*theRangeCoeffCTable)(materialIndex))(binnumber-1) ; |
---|
| 713 | if(A==0.) |
---|
| 714 | KineticEnergy = (LowEdgeRange -C )/B ; |
---|
| 715 | else |
---|
| 716 | { |
---|
| 717 | discr = B*B - 4.*A*(C-LowEdgeRange); |
---|
| 718 | discr = discr>0. ? std::sqrt(discr) : 0.; |
---|
| 719 | KineticEnergy = 0.5*(discr-B)/A ; |
---|
| 720 | } |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | aVector->PutValue(i,KineticEnergy) ; |
---|
| 724 | } |
---|
| 725 | } |
---|
| 726 | |
---|
| 727 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 728 | |
---|
| 729 | G4PhysicsTable* G4VEnergyLoss::BuildRangeCoeffATable(G4PhysicsTable* theRangeTable, |
---|
| 730 | G4PhysicsTable* theRangeCoeffATable, |
---|
| 731 | G4double LowestKineticEnergy, |
---|
| 732 | G4double HighestKineticEnergy,G4int TotBin) |
---|
| 733 | // Build tables of coefficients for the energy loss calculation |
---|
| 734 | // create table for coefficients "A" |
---|
| 735 | { |
---|
| 736 | G4int numOfMaterials = theRangeTable->length(); |
---|
| 737 | |
---|
| 738 | if(theRangeCoeffATable) |
---|
| 739 | { theRangeCoeffATable->clearAndDestroy(); |
---|
| 740 | delete theRangeCoeffATable; } |
---|
| 741 | theRangeCoeffATable = new G4PhysicsTable(numOfMaterials); |
---|
| 742 | |
---|
| 743 | G4double RTable = std::exp(std::log(HighestKineticEnergy/LowestKineticEnergy)/TotBin) ; |
---|
| 744 | G4double R2 = RTable*RTable ; |
---|
| 745 | G4double R1 = RTable+1.; |
---|
| 746 | G4double w = R1*(RTable-1.)*(RTable-1.); |
---|
| 747 | G4double w1 = RTable/w , w2 = -RTable*R1/w , w3 = R2/w ; |
---|
| 748 | G4double Ti , Tim , Tip , Ri , Rim , Rip , Value ; |
---|
| 749 | G4bool isOut; |
---|
| 750 | |
---|
| 751 | // loop for materials |
---|
| 752 | for (G4int J=0; J<numOfMaterials; J++) |
---|
| 753 | { |
---|
| 754 | G4int binmax=TotBin ; |
---|
| 755 | G4PhysicsLinearVector* aVector = |
---|
| 756 | new G4PhysicsLinearVector(0.,binmax, TotBin); |
---|
| 757 | Ti = LowestKineticEnergy ; |
---|
| 758 | G4PhysicsVector* rangeVector= (*theRangeTable)[J]; |
---|
| 759 | |
---|
| 760 | for ( G4int i=0; i<TotBin; i++) |
---|
| 761 | { |
---|
| 762 | Ri = rangeVector->GetValue(Ti,isOut) ; |
---|
| 763 | if ( i==0 ) |
---|
| 764 | Rim = 0. ; |
---|
| 765 | else |
---|
| 766 | { |
---|
| 767 | Tim = Ti/RTable ; |
---|
| 768 | Rim = rangeVector->GetValue(Tim,isOut); |
---|
| 769 | } |
---|
| 770 | if ( i==(TotBin-1)) |
---|
| 771 | Rip = Ri ; |
---|
| 772 | else |
---|
| 773 | { |
---|
| 774 | Tip = Ti*RTable ; |
---|
| 775 | Rip = rangeVector->GetValue(Tip,isOut); |
---|
| 776 | } |
---|
| 777 | Value = (w1*Rip + w2*Ri + w3*Rim)/(Ti*Ti) ; |
---|
| 778 | |
---|
| 779 | aVector->PutValue(i,Value); |
---|
| 780 | Ti = RTable*Ti ; |
---|
| 781 | } |
---|
| 782 | |
---|
| 783 | theRangeCoeffATable->insert(aVector); |
---|
| 784 | } |
---|
| 785 | return theRangeCoeffATable ; |
---|
| 786 | } |
---|
| 787 | |
---|
| 788 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 789 | |
---|
| 790 | G4PhysicsTable* G4VEnergyLoss::BuildRangeCoeffBTable(G4PhysicsTable* theRangeTable, |
---|
| 791 | G4PhysicsTable* theRangeCoeffBTable, |
---|
| 792 | G4double LowestKineticEnergy, |
---|
| 793 | G4double HighestKineticEnergy,G4int TotBin) |
---|
| 794 | // Build tables of coefficients for the energy loss calculation |
---|
| 795 | // create table for coefficients "B" |
---|
| 796 | { |
---|
| 797 | G4int numOfMaterials = theRangeTable->length(); |
---|
| 798 | |
---|
| 799 | if(theRangeCoeffBTable) |
---|
| 800 | { theRangeCoeffBTable->clearAndDestroy(); |
---|
| 801 | delete theRangeCoeffBTable; } |
---|
| 802 | theRangeCoeffBTable = new G4PhysicsTable(numOfMaterials); |
---|
| 803 | |
---|
| 804 | G4double RTable = std::exp(std::log(HighestKineticEnergy/LowestKineticEnergy)/TotBin) ; |
---|
| 805 | G4double R2 = RTable*RTable ; |
---|
| 806 | G4double R1 = RTable+1.; |
---|
| 807 | G4double w = R1*(RTable-1.)*(RTable-1.); |
---|
| 808 | G4double w1 = -R1/w , w2 = R1*(R2+1.)/w , w3 = -R2*R1/w ; |
---|
| 809 | G4double Ti , Tim , Tip , Ri , Rim , Rip , Value ; |
---|
| 810 | G4bool isOut; |
---|
| 811 | |
---|
| 812 | // loop for materials |
---|
| 813 | for (G4int J=0; J<numOfMaterials; J++) |
---|
| 814 | { |
---|
| 815 | G4int binmax=TotBin ; |
---|
| 816 | G4PhysicsLinearVector* aVector = |
---|
| 817 | new G4PhysicsLinearVector(0.,binmax, TotBin); |
---|
| 818 | Ti = LowestKineticEnergy ; |
---|
| 819 | G4PhysicsVector* rangeVector= (*theRangeTable)[J]; |
---|
| 820 | |
---|
| 821 | for ( G4int i=0; i<TotBin; i++) |
---|
| 822 | { |
---|
| 823 | Ri = rangeVector->GetValue(Ti,isOut) ; |
---|
| 824 | if ( i==0 ) |
---|
| 825 | Rim = 0. ; |
---|
| 826 | else |
---|
| 827 | { |
---|
| 828 | Tim = Ti/RTable ; |
---|
| 829 | Rim = rangeVector->GetValue(Tim,isOut); |
---|
| 830 | } |
---|
| 831 | if ( i==(TotBin-1)) |
---|
| 832 | Rip = Ri ; |
---|
| 833 | else |
---|
| 834 | { |
---|
| 835 | Tip = Ti*RTable ; |
---|
| 836 | Rip = rangeVector->GetValue(Tip,isOut); |
---|
| 837 | } |
---|
| 838 | Value = (w1*Rip + w2*Ri + w3*Rim)/Ti; |
---|
| 839 | |
---|
| 840 | aVector->PutValue(i,Value); |
---|
| 841 | Ti = RTable*Ti ; |
---|
| 842 | } |
---|
| 843 | theRangeCoeffBTable->insert(aVector); |
---|
| 844 | } |
---|
| 845 | return theRangeCoeffBTable ; |
---|
| 846 | } |
---|
| 847 | |
---|
| 848 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 849 | |
---|
| 850 | G4PhysicsTable* G4VEnergyLoss::BuildRangeCoeffCTable(G4PhysicsTable* theRangeTable, |
---|
| 851 | G4PhysicsTable* theRangeCoeffCTable, |
---|
| 852 | G4double LowestKineticEnergy, |
---|
| 853 | G4double HighestKineticEnergy,G4int TotBin) |
---|
| 854 | // Build tables of coefficients for the energy loss calculation |
---|
| 855 | // create table for coefficients "C" |
---|
| 856 | { |
---|
| 857 | G4int numOfMaterials = theRangeTable->length(); |
---|
| 858 | |
---|
| 859 | if(theRangeCoeffCTable) |
---|
| 860 | { theRangeCoeffCTable->clearAndDestroy(); |
---|
| 861 | delete theRangeCoeffCTable; } |
---|
| 862 | theRangeCoeffCTable = new G4PhysicsTable(numOfMaterials); |
---|
| 863 | |
---|
| 864 | G4double RTable = std::exp(std::log(HighestKineticEnergy/LowestKineticEnergy)/TotBin) ; |
---|
| 865 | G4double R2 = RTable*RTable ; |
---|
| 866 | G4double R1 = RTable+1.; |
---|
| 867 | G4double w = R1*(RTable-1.)*(RTable-1.); |
---|
| 868 | G4double w1 = 1./w , w2 = -RTable*R1/w , w3 = RTable*R2/w ; |
---|
| 869 | G4double Ti , Tim , Tip , Ri , Rim , Rip , Value ; |
---|
| 870 | G4bool isOut; |
---|
| 871 | |
---|
| 872 | // loop for materials |
---|
| 873 | for (G4int J=0; J<numOfMaterials; J++) |
---|
| 874 | { |
---|
| 875 | G4int binmax=TotBin ; |
---|
| 876 | G4PhysicsLinearVector* aVector = |
---|
| 877 | new G4PhysicsLinearVector(0.,binmax, TotBin); |
---|
| 878 | Ti = LowestKineticEnergy ; |
---|
| 879 | G4PhysicsVector* rangeVector= (*theRangeTable)[J]; |
---|
| 880 | |
---|
| 881 | for ( G4int i=0; i<TotBin; i++) |
---|
| 882 | { |
---|
| 883 | Ri = rangeVector->GetValue(Ti,isOut) ; |
---|
| 884 | if ( i==0 ) |
---|
| 885 | Rim = 0. ; |
---|
| 886 | else |
---|
| 887 | { |
---|
| 888 | Tim = Ti/RTable ; |
---|
| 889 | Rim = rangeVector->GetValue(Tim,isOut); |
---|
| 890 | } |
---|
| 891 | if ( i==(TotBin-1)) |
---|
| 892 | Rip = Ri ; |
---|
| 893 | else |
---|
| 894 | { |
---|
| 895 | Tip = Ti*RTable ; |
---|
| 896 | Rip = rangeVector->GetValue(Tip,isOut); |
---|
| 897 | } |
---|
| 898 | Value = w1*Rip + w2*Ri + w3*Rim ; |
---|
| 899 | |
---|
| 900 | aVector->PutValue(i,Value); |
---|
| 901 | Ti = RTable*Ti ; |
---|
| 902 | } |
---|
| 903 | theRangeCoeffCTable->insert(aVector); |
---|
| 904 | } |
---|
| 905 | return theRangeCoeffCTable ; |
---|
| 906 | } |
---|
| 907 | |
---|
| 908 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 909 | |
---|
| 910 | G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle, |
---|
| 911 | const G4MaterialCutsCouple* couple, |
---|
| 912 | G4double ChargeSquare, |
---|
| 913 | G4double MeanLoss, |
---|
| 914 | G4double step ) |
---|
| 915 | // calculate actual loss from the mean loss |
---|
| 916 | // The model used to get the fluctuation is essentially the same as in Glandz in Geant3. |
---|
| 917 | { |
---|
| 918 | const G4double minLoss = 1.*eV ; |
---|
| 919 | const G4double probLim = 0.01 ; |
---|
| 920 | const G4double sumaLim = -std::log(probLim) ; |
---|
| 921 | const G4double alim=10.; |
---|
| 922 | const G4double kappa = 10. ; |
---|
| 923 | const G4double factor = twopi_mc2_rcl2 ; |
---|
| 924 | const G4Material* aMaterial = couple->GetMaterial(); |
---|
| 925 | |
---|
| 926 | // check if the material has changed ( cache mechanism) |
---|
| 927 | |
---|
| 928 | if (aMaterial != lastMaterial) |
---|
| 929 | { |
---|
| 930 | lastMaterial = aMaterial; |
---|
| 931 | imat = couple->GetIndex(); |
---|
| 932 | f1Fluct = aMaterial->GetIonisation()->GetF1fluct(); |
---|
| 933 | f2Fluct = aMaterial->GetIonisation()->GetF2fluct(); |
---|
| 934 | e1Fluct = aMaterial->GetIonisation()->GetEnergy1fluct(); |
---|
| 935 | e2Fluct = aMaterial->GetIonisation()->GetEnergy2fluct(); |
---|
| 936 | e1LogFluct = aMaterial->GetIonisation()->GetLogEnergy1fluct(); |
---|
| 937 | e2LogFluct = aMaterial->GetIonisation()->GetLogEnergy2fluct(); |
---|
| 938 | rateFluct = aMaterial->GetIonisation()->GetRateionexcfluct(); |
---|
| 939 | ipotFluct = aMaterial->GetIonisation()->GetMeanExcitationEnergy(); |
---|
| 940 | ipotLogFluct = aMaterial->GetIonisation()->GetLogMeanExcEnergy(); |
---|
| 941 | } |
---|
| 942 | G4double threshold,w1,w2,C, |
---|
| 943 | beta2,suma,e0,loss,lossc ,w,electronDensity; |
---|
| 944 | G4double a1,a2,a3; |
---|
| 945 | G4double p1,p2,p3 ; |
---|
| 946 | G4int nb; |
---|
| 947 | G4double Corrfac, na,alfa,rfac,namean,sa,alfa1,ea,sea; |
---|
| 948 | G4double dp3; |
---|
| 949 | G4double siga ; |
---|
| 950 | |
---|
| 951 | // shortcut for very very small loss |
---|
| 952 | if(MeanLoss < minLoss) return MeanLoss ; |
---|
| 953 | |
---|
| 954 | // get particle data |
---|
| 955 | G4double Tkin = aParticle->GetKineticEnergy(); |
---|
| 956 | ParticleMass = aParticle->GetMass() ; |
---|
| 957 | |
---|
| 958 | threshold = (*((G4ProductionCutsTable::GetProductionCutsTable()) |
---|
| 959 | ->GetEnergyCutsVector(1)))[imat]; |
---|
| 960 | G4double rmass = electron_mass_c2/ParticleMass; |
---|
| 961 | G4double tau = Tkin/ParticleMass, tau1 = tau+1., tau2 = tau*(tau+2.); |
---|
| 962 | G4double Tm = 2.*electron_mass_c2*tau2/(1.+2.*tau1*rmass+rmass*rmass); |
---|
| 963 | |
---|
| 964 | if(Tm > threshold) Tm = threshold; |
---|
| 965 | |
---|
| 966 | beta2 = tau2/(tau1*tau1); |
---|
| 967 | |
---|
| 968 | // Gaussian fluctuation ? |
---|
| 969 | if(MeanLoss >= kappa*Tm || Tm < kappa*ipotFluct) |
---|
| 970 | { |
---|
| 971 | electronDensity = aMaterial->GetElectronDensity() ; |
---|
| 972 | siga = std::sqrt(Tm*(1.0-0.5*beta2)*step* |
---|
| 973 | factor*electronDensity*ChargeSquare/beta2) ; |
---|
| 974 | do { |
---|
| 975 | loss = G4RandGauss::shoot(MeanLoss,siga) ; |
---|
| 976 | } while (loss < 0. || loss > 2.*MeanLoss); |
---|
| 977 | return loss; |
---|
| 978 | } |
---|
| 979 | |
---|
| 980 | w1 = Tm/ipotFluct; |
---|
| 981 | w2 = std::log(2.*electron_mass_c2*tau2); |
---|
| 982 | |
---|
| 983 | C = MeanLoss*(1.-rateFluct)/(w2-ipotLogFluct-beta2); |
---|
| 984 | |
---|
| 985 | a1 = C*f1Fluct*(w2-e1LogFluct-beta2)/e1Fluct; |
---|
| 986 | a2 = C*f2Fluct*(w2-e2LogFluct-beta2)/e2Fluct; |
---|
| 987 | a3 = rateFluct*MeanLoss*(Tm-ipotFluct)/(ipotFluct*Tm*std::log(w1)); |
---|
| 988 | if(a1 < 0.) a1 = 0.; |
---|
| 989 | if(a2 < 0.) a2 = 0.; |
---|
| 990 | if(a3 < 0.) a3 = 0.; |
---|
| 991 | |
---|
| 992 | suma = a1+a2+a3; |
---|
| 993 | |
---|
| 994 | loss = 0. ; |
---|
| 995 | |
---|
| 996 | if(suma < sumaLim) // very small Step |
---|
| 997 | { |
---|
| 998 | e0 = aMaterial->GetIonisation()->GetEnergy0fluct(); |
---|
| 999 | |
---|
| 1000 | if(Tm == ipotFluct) |
---|
| 1001 | { |
---|
| 1002 | a3 = MeanLoss/e0; |
---|
| 1003 | |
---|
| 1004 | if(a3>alim) |
---|
| 1005 | { |
---|
| 1006 | siga=std::sqrt(a3) ; |
---|
| 1007 | p3 = std::max(0.,G4RandGauss::shoot(a3,siga)+0.5); |
---|
| 1008 | } |
---|
| 1009 | else |
---|
| 1010 | p3 = G4float(G4Poisson(a3)); |
---|
| 1011 | |
---|
| 1012 | loss = p3*e0 ; |
---|
| 1013 | |
---|
| 1014 | if(p3 > 0) |
---|
| 1015 | loss += (1.-2.*G4UniformRand())*e0 ; |
---|
| 1016 | |
---|
| 1017 | } |
---|
| 1018 | else |
---|
| 1019 | { |
---|
| 1020 | Tm = Tm-ipotFluct+e0 ; |
---|
| 1021 | a3 = MeanLoss*(Tm-e0)/(Tm*e0*std::log(Tm/e0)); |
---|
| 1022 | |
---|
| 1023 | if(a3>alim) |
---|
| 1024 | { |
---|
| 1025 | siga=std::sqrt(a3) ; |
---|
| 1026 | p3 = std::max(0.,G4RandGauss::shoot(a3,siga)+0.5); |
---|
| 1027 | } |
---|
| 1028 | else |
---|
| 1029 | p3 = G4float(G4Poisson(a3)); |
---|
| 1030 | |
---|
| 1031 | if(p3 > 0) |
---|
| 1032 | { |
---|
| 1033 | w = (Tm-e0)/Tm ; |
---|
| 1034 | if(p3 > G4float(nmaxCont2)) |
---|
| 1035 | { |
---|
| 1036 | dp3 = p3 ; |
---|
| 1037 | Corrfac = dp3/G4float(nmaxCont2) ; |
---|
| 1038 | p3 = G4float(nmaxCont2) ; |
---|
| 1039 | } |
---|
| 1040 | else |
---|
| 1041 | Corrfac = 1. ; |
---|
| 1042 | |
---|
| 1043 | for(G4int i=0; i<G4int(p3); i++) loss += 1./(1.-w*G4UniformRand()) ; |
---|
| 1044 | loss *= e0*Corrfac ; |
---|
| 1045 | } |
---|
| 1046 | } |
---|
| 1047 | } |
---|
| 1048 | |
---|
| 1049 | else // not so small Step |
---|
| 1050 | { |
---|
| 1051 | // excitation type 1 |
---|
| 1052 | if(a1>alim) |
---|
| 1053 | { |
---|
| 1054 | siga=std::sqrt(a1) ; |
---|
| 1055 | p1 = std::max(0.,G4RandGauss::shoot(a1,siga)+0.5); |
---|
| 1056 | } |
---|
| 1057 | else |
---|
| 1058 | p1 = G4float(G4Poisson(a1)); |
---|
| 1059 | |
---|
| 1060 | // excitation type 2 |
---|
| 1061 | if(a2>alim) |
---|
| 1062 | { |
---|
| 1063 | siga=std::sqrt(a2) ; |
---|
| 1064 | p2 = std::max(0.,G4RandGauss::shoot(a2,siga)+0.5); |
---|
| 1065 | } |
---|
| 1066 | else |
---|
| 1067 | p2 = G4float(G4Poisson(a2)); |
---|
| 1068 | |
---|
| 1069 | loss = p1*e1Fluct+p2*e2Fluct; |
---|
| 1070 | // smearing to avoid unphysical peaks |
---|
| 1071 | if(p2 > 0) |
---|
| 1072 | loss += (1.-2.*G4UniformRand())*e2Fluct; |
---|
| 1073 | else if (loss>0.) |
---|
| 1074 | loss += (1.-2.*G4UniformRand())*e1Fluct; |
---|
| 1075 | |
---|
| 1076 | // ionisation ....................................... |
---|
| 1077 | if(a3 > 0.) |
---|
| 1078 | { |
---|
| 1079 | if(a3>alim) |
---|
| 1080 | { |
---|
| 1081 | siga=std::sqrt(a3) ; |
---|
| 1082 | p3 = std::max(0.,G4RandGauss::shoot(a3,siga)+0.5); |
---|
| 1083 | } |
---|
| 1084 | else |
---|
| 1085 | p3 = G4float(G4Poisson(a3)); |
---|
| 1086 | |
---|
| 1087 | lossc = 0.; |
---|
| 1088 | if(p3 > 0) |
---|
| 1089 | { |
---|
| 1090 | na = 0.; |
---|
| 1091 | alfa = 1.; |
---|
| 1092 | if (p3 > G4float(nmaxCont2)) |
---|
| 1093 | { |
---|
| 1094 | dp3 = p3; |
---|
| 1095 | rfac = dp3/(G4float(nmaxCont2)+dp3); |
---|
| 1096 | namean = p3*rfac; |
---|
| 1097 | sa = G4float(nmaxCont1)*rfac; |
---|
| 1098 | na = G4RandGauss::shoot(namean,sa); |
---|
| 1099 | if (na > 0.) |
---|
| 1100 | { |
---|
| 1101 | alfa = w1*(G4float(nmaxCont2)+p3)/(w1*G4float(nmaxCont2)+p3); |
---|
| 1102 | alfa1 = alfa*std::log(alfa)/(alfa-1.); |
---|
| 1103 | ea = na*ipotFluct*alfa1; |
---|
| 1104 | sea = ipotFluct*std::sqrt(na*(alfa-alfa1*alfa1)); |
---|
| 1105 | lossc += G4RandGauss::shoot(ea,sea); |
---|
| 1106 | } |
---|
| 1107 | } |
---|
| 1108 | |
---|
| 1109 | nb = G4int(p3-na); |
---|
| 1110 | if (nb > 0) |
---|
| 1111 | { |
---|
| 1112 | w2 = alfa*ipotFluct; |
---|
| 1113 | w = (Tm-w2)/Tm; |
---|
| 1114 | for (G4int k=0; k<nb; k++) lossc += w2/(1.-w*G4UniformRand()); |
---|
| 1115 | } |
---|
| 1116 | } |
---|
| 1117 | loss += lossc; |
---|
| 1118 | } |
---|
| 1119 | } |
---|
| 1120 | |
---|
| 1121 | if( loss < 0.) |
---|
| 1122 | loss = 0.; |
---|
| 1123 | |
---|
| 1124 | return loss ; |
---|
| 1125 | } |
---|
| 1126 | |
---|
| 1127 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 1128 | |
---|
| 1129 | G4bool G4VEnergyLoss::EqualCutVectors( G4double* vec1, G4double* vec2 ) |
---|
| 1130 | { |
---|
| 1131 | if ( (vec1==0 ) || (vec2==0) ) return false; |
---|
| 1132 | |
---|
| 1133 | G4bool flag = true; |
---|
| 1134 | |
---|
| 1135 | for (size_t j=0; flag && j<G4Material::GetNumberOfMaterials(); j++){ |
---|
| 1136 | flag = (vec1[j] == vec2[j]); |
---|
| 1137 | } |
---|
| 1138 | |
---|
| 1139 | return flag; |
---|
| 1140 | } |
---|
| 1141 | |
---|
| 1142 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 1143 | |
---|
| 1144 | G4double* G4VEnergyLoss::CopyCutVectors( G4double* dest, G4double* source ) |
---|
| 1145 | { |
---|
| 1146 | if ( dest != 0) delete [] dest; |
---|
| 1147 | dest = new G4double [G4Material::GetNumberOfMaterials()]; |
---|
| 1148 | for (size_t j=0; j<G4Material::GetNumberOfMaterials(); j++){ |
---|
| 1149 | dest[j] = source[j]; |
---|
| 1150 | } |
---|
| 1151 | return dest; |
---|
| 1152 | } |
---|
| 1153 | |
---|
| 1154 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 1155 | |
---|
| 1156 | G4bool G4VEnergyLoss::CutsWhereModified() |
---|
| 1157 | { |
---|
| 1158 | G4bool wasModified = false; |
---|
| 1159 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 1160 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 1161 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
| 1162 | |
---|
| 1163 | for (size_t j=0; j<numOfCouples; j++){ |
---|
| 1164 | if (theCoupleTable->GetMaterialCutsCouple(j)->IsRecalcNeeded()) { |
---|
| 1165 | wasModified = true; |
---|
| 1166 | break; |
---|
| 1167 | } |
---|
| 1168 | } |
---|
| 1169 | return wasModified; |
---|
| 1170 | } |
---|
| 1171 | |
---|
| 1172 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|