[816] | 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 | // |
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| 28 | // MODULE: G4SPSEneDistribution.cc |
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| 29 | // |
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| 30 | // Version: 1.0 |
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| 31 | // Date: 5/02/04 |
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| 32 | // Author: Fan Lei |
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| 33 | // Organisation: QinetiQ ltd. |
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| 34 | // Customer: ESA/ESTEC |
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| 35 | // |
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| 36 | /////////////////////////////////////////////////////////////////////////////// |
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| 37 | // |
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| 38 | // CHANGE HISTORY |
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| 39 | // -------------- |
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| 40 | // |
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| 41 | // |
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| 42 | // Version 1.0, 05/02/2004, Fan Lei, Created. |
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| 43 | // Based on the G4GeneralParticleSource class in Geant4 v6.0 |
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| 44 | // |
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| 45 | /////////////////////////////////////////////////////////////////////////////// |
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| 46 | // |
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| 47 | #include "Randomize.hh" |
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| 48 | //#include <cmath> |
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| 49 | |
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| 50 | #include "G4SPSEneDistribution.hh" |
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| 51 | |
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| 52 | G4SPSEneDistribution::G4SPSEneDistribution() |
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| 53 | { |
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| 54 | // |
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| 55 | // Initialise all variables |
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| 56 | particle_energy = 1.0*MeV; |
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| 57 | |
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| 58 | EnergyDisType = "Mono"; |
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| 59 | MonoEnergy = 1*MeV; |
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| 60 | Emin = 0.; |
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| 61 | Emax = 1.e30; |
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| 62 | alpha = 0.; |
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| 63 | Ezero = 0.; |
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| 64 | SE = 0.; |
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| 65 | Temp = 0.; |
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| 66 | grad = 0.; |
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| 67 | cept = 0.; |
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| 68 | EnergySpec = true; // true - energy spectra, false - momentum spectra |
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| 69 | DiffSpec = true; // true - differential spec, false integral spec |
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| 70 | IntType = "NULL"; // Interpolation type |
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| 71 | IPDFEnergyExist = false; |
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| 72 | IPDFArbExist = false; |
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| 73 | |
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| 74 | ArbEmin = 0.; |
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| 75 | ArbEmax = 1.e30; |
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| 76 | |
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| 77 | verbosityLevel = 0 ; |
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| 78 | |
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| 79 | } |
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| 80 | |
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| 81 | G4SPSEneDistribution::~G4SPSEneDistribution() |
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| 82 | {} |
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| 83 | |
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| 84 | void G4SPSEneDistribution::SetEnergyDisType(G4String DisType) |
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| 85 | { |
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| 86 | EnergyDisType = DisType; |
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| 87 | if (EnergyDisType == "User"){ |
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| 88 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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| 89 | IPDFEnergyExist = false ; |
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| 90 | } else if ( EnergyDisType == "Arb"){ |
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| 91 | ArbEnergyH =IPDFArbEnergyH = ZeroPhysVector ; |
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| 92 | IPDFArbExist = false; |
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| 93 | } else if (EnergyDisType == "Epn"){ |
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| 94 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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| 95 | IPDFEnergyExist = false ; |
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| 96 | EpnEnergyH = ZeroPhysVector ; |
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| 97 | } |
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| 98 | } |
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| 99 | |
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| 100 | void G4SPSEneDistribution::SetEmin(G4double emi) |
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| 101 | { |
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| 102 | Emin = emi; |
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| 103 | } |
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| 104 | |
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| 105 | void G4SPSEneDistribution::SetEmax(G4double ema) |
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| 106 | { |
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| 107 | Emax = ema; |
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| 108 | } |
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| 109 | |
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| 110 | void G4SPSEneDistribution::SetMonoEnergy(G4double menergy) |
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| 111 | { |
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| 112 | MonoEnergy = menergy; |
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| 113 | } |
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| 114 | |
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| 115 | void G4SPSEneDistribution::SetBeamSigmaInE(G4double e) |
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| 116 | { |
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| 117 | SE = e; |
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| 118 | } |
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| 119 | void G4SPSEneDistribution::SetAlpha(G4double alp) |
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| 120 | { |
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| 121 | alpha = alp; |
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| 122 | } |
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| 123 | |
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| 124 | void G4SPSEneDistribution::SetTemp(G4double tem) |
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| 125 | { |
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| 126 | Temp = tem; |
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| 127 | } |
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| 128 | |
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| 129 | void G4SPSEneDistribution::SetEzero(G4double eze) |
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| 130 | { |
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| 131 | Ezero = eze; |
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| 132 | } |
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| 133 | |
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| 134 | void G4SPSEneDistribution::SetGradient(G4double gr) |
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| 135 | { |
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| 136 | grad = gr; |
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| 137 | } |
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| 138 | |
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| 139 | void G4SPSEneDistribution::SetInterCept(G4double c) |
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| 140 | { |
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| 141 | cept = c; |
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| 142 | } |
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| 143 | |
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| 144 | void G4SPSEneDistribution::UserEnergyHisto(G4ThreeVector input) |
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| 145 | { |
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| 146 | G4double ehi, val; |
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| 147 | ehi = input.x(); |
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| 148 | val = input.y(); |
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| 149 | if(verbosityLevel > 1) { |
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| 150 | G4cout << "In UserEnergyHisto" << G4endl; |
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| 151 | G4cout << " " << ehi << " " << val << G4endl; |
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| 152 | } |
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| 153 | UDefEnergyH.InsertValues(ehi, val); |
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| 154 | Emax = ehi; |
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| 155 | } |
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| 156 | |
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| 157 | void G4SPSEneDistribution::ArbEnergyHisto(G4ThreeVector input) |
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| 158 | { |
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| 159 | G4double ehi, val; |
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| 160 | ehi = input.x(); |
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| 161 | val = input.y(); |
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| 162 | if(verbosityLevel >1 ) { |
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| 163 | G4cout << "In ArbEnergyHisto" << G4endl; |
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| 164 | G4cout << " " << ehi << " " << val << G4endl; |
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| 165 | } |
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| 166 | ArbEnergyH.InsertValues(ehi, val); |
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| 167 | } |
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| 168 | |
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| 169 | void G4SPSEneDistribution::EpnEnergyHisto(G4ThreeVector input) |
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| 170 | { |
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| 171 | G4double ehi, val; |
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| 172 | ehi = input.x(); |
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| 173 | val = input.y(); |
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| 174 | if(verbosityLevel > 1) { |
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| 175 | G4cout << "In EpnEnergyHisto" << G4endl; |
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| 176 | G4cout << " " << ehi << " " << val << G4endl; |
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| 177 | } |
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| 178 | EpnEnergyH.InsertValues(ehi, val); |
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| 179 | Emax = ehi; |
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| 180 | Epnflag = true; |
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| 181 | } |
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| 182 | |
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| 183 | void G4SPSEneDistribution::Calculate() |
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| 184 | { |
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| 185 | if(EnergyDisType == "Cdg") |
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| 186 | CalculateCdgSpectrum(); |
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| 187 | else if(EnergyDisType == "Bbody") |
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| 188 | CalculateBbodySpectrum(); |
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| 189 | } |
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| 190 | |
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| 191 | void G4SPSEneDistribution::CalculateCdgSpectrum() |
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| 192 | { |
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| 193 | // This uses the spectrum from The INTEGRAL Mass Model (TIMM) |
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| 194 | // to generate a Cosmic Diffuse X/gamma ray spectrum. |
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| 195 | G4double pfact[2] = {8.5, 112}; |
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| 196 | G4double spind[2] = {1.4, 2.3}; |
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| 197 | G4double ene_line[3] = {1.*keV, 18.*keV, 1E6*keV}; |
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| 198 | G4int n_par; |
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| 199 | |
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| 200 | ene_line[0] = Emin; |
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| 201 | if(Emin < 18*keV) |
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| 202 | { |
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| 203 | n_par = 2; |
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| 204 | ene_line[2] = Emax; |
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| 205 | if(Emax < 18*keV) |
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| 206 | { |
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| 207 | n_par = 1; |
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| 208 | ene_line[1] = Emax; |
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| 209 | } |
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| 210 | } |
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| 211 | else |
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| 212 | { |
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| 213 | n_par = 1; |
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| 214 | pfact[0] = 112.; |
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| 215 | spind[0] = 2.3; |
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| 216 | ene_line[1] = Emax; |
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| 217 | } |
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| 218 | |
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| 219 | // Create a cumulative histogram. |
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| 220 | CDGhist[0] = 0.; |
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| 221 | G4double omalpha; |
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| 222 | G4int i = 0; |
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| 223 | |
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| 224 | while(i < n_par) |
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| 225 | { |
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| 226 | omalpha = 1. - spind[i]; |
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| 227 | CDGhist[i+1] = CDGhist[i] + (pfact[i]/omalpha)* |
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| 228 | (std::pow(ene_line[i+1]/keV,omalpha)-std::pow(ene_line[i]/keV,omalpha)); |
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| 229 | i++; |
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| 230 | } |
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| 231 | |
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| 232 | // Normalise histo and divide by 1000 to make MeV. |
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| 233 | i = 0; |
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| 234 | while(i < n_par) |
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| 235 | { |
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| 236 | CDGhist[i+1] = CDGhist[i+1]/CDGhist[n_par]; |
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| 237 | // G4cout << CDGhist[i] << CDGhist[n_par] << G4endl; |
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| 238 | i++; |
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| 239 | } |
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| 240 | } |
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| 241 | |
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| 242 | void G4SPSEneDistribution::CalculateBbodySpectrum() |
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| 243 | { |
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| 244 | // create bbody spectrum |
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| 245 | // Proved very hard to integrate indefinitely, so different |
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| 246 | // method. User inputs emin, emax and T. These are used to |
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| 247 | // create a 10,000 bin histogram. |
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| 248 | // Use photon density spectrum = 2 nu**2/c**2 * (std::exp(h nu/kT)-1) |
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| 249 | // = 2 E**2/h**2c**2 times the exponential |
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| 250 | G4double erange = Emax - Emin; |
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| 251 | G4double steps = erange/10000.; |
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| 252 | G4double Bbody_y[10000]; |
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| 253 | G4double k = 8.6181e-11; //Boltzmann const in MeV/K |
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| 254 | G4double h = 4.1362e-21; // Plancks const in MeV s |
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| 255 | G4double c = 3e8; // Speed of light |
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| 256 | G4double h2 = h*h; |
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| 257 | G4double c2 = c*c; |
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| 258 | G4int count = 0; |
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| 259 | G4double sum = 0.; |
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| 260 | BBHist[0] = 0.; |
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| 261 | while(count < 10000) |
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| 262 | { |
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| 263 | Bbody_x[count] = Emin + G4double(count*steps); |
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| 264 | Bbody_y[count] = (2.*std::pow(Bbody_x[count],2.))/ |
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| 265 | (h2*c2*(std::exp(Bbody_x[count]/(k*Temp)) - 1.)); |
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| 266 | sum = sum + Bbody_y[count]; |
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| 267 | BBHist[count+1] = BBHist[count] + Bbody_y[count]; |
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| 268 | count++; |
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| 269 | } |
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| 270 | |
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| 271 | Bbody_x[10000] = Emax; |
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| 272 | // Normalise cumulative histo. |
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| 273 | count = 0; |
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| 274 | while(count<10001) |
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| 275 | { |
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| 276 | BBHist[count] = BBHist[count]/sum; |
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| 277 | count++; |
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| 278 | } |
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| 279 | } |
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| 280 | |
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| 281 | void G4SPSEneDistribution::InputEnergySpectra(G4bool value) |
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| 282 | { |
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| 283 | // Allows user to specifiy spectrum is momentum |
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| 284 | EnergySpec = value; // false if momentum |
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| 285 | if(verbosityLevel > 1) |
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| 286 | G4cout << "EnergySpec has value " << EnergySpec << G4endl; |
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| 287 | } |
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| 288 | |
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| 289 | void G4SPSEneDistribution::InputDifferentialSpectra(G4bool value) |
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| 290 | { |
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| 291 | // Allows user to specify integral or differential spectra |
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| 292 | DiffSpec = value; // true = differential, false = integral |
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| 293 | if(verbosityLevel > 1) |
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| 294 | G4cout << "Diffspec has value " << DiffSpec << G4endl; |
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| 295 | } |
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| 296 | |
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| 297 | void G4SPSEneDistribution::ArbInterpolate(G4String IType) |
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| 298 | { |
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| 299 | if(EnergyDisType != "Arb") |
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| 300 | G4cout << "Error: this is for arbitrary distributions" << G4endl; |
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| 301 | IntType = IType; |
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| 302 | ArbEmax = Emax; |
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| 303 | ArbEmin = Emin; |
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| 304 | |
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| 305 | // Now interpolate points |
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| 306 | if(IntType == "Lin") |
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| 307 | LinearInterpolation(); |
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| 308 | if(IntType == "Log") |
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| 309 | LogInterpolation(); |
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| 310 | if(IntType == "Exp") |
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| 311 | ExpInterpolation(); |
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| 312 | if(IntType == "Spline") |
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| 313 | SplineInterpolation(); |
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| 314 | } |
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| 315 | |
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| 316 | void G4SPSEneDistribution::LinearInterpolation() |
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| 317 | { |
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| 318 | // Method to do linear interpolation on the Arb points |
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| 319 | // Calculate equation of each line segment, max 1024. |
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| 320 | // Calculate Area under each segment |
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| 321 | // Create a cumulative array which is then normalised Arb_Cum_Area |
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| 322 | |
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| 323 | G4double Area_seg[1024]; // Stores area under each segment |
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| 324 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
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| 325 | G4int i, count; |
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| 326 | G4int maxi = ArbEnergyH.GetVectorLength(); |
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| 327 | for(i=0;i<maxi;i++) { |
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| 328 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
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| 329 | Arb_y[i] = ArbEnergyH(size_t(i)); |
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| 330 | } |
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| 331 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
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| 332 | // made differential and if momentum it has to be made energy. |
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| 333 | if(DiffSpec == false) { |
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| 334 | // Converts integral point-wise spectra to Differential |
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| 335 | for( count=0;count < maxi-1;count++) { |
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| 336 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
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| 337 | } |
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| 338 | maxi--; |
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| 339 | } |
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| 340 | // |
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| 341 | if(EnergySpec == false) { |
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| 342 | // change currently stored values (emin etc) which are actually momenta |
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| 343 | // to energies. |
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| 344 | if(particle_definition == NULL) |
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| 345 | G4cout << "Error: particle not defined" << G4endl; |
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| 346 | else { |
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| 347 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
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| 348 | // p should be entered as E/c i.e. without the division by c |
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| 349 | // being done - energy equivalent. |
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| 350 | G4double mass = particle_definition->GetPDGMass(); |
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| 351 | // convert point to energy unit and its value to per energy unit |
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| 352 | G4double total_energy; |
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| 353 | for(count=0;count<maxi;count++) { |
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| 354 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
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| 355 | + (mass*mass)); // total energy |
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| 356 | |
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| 357 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
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| 358 | Arb_x[count] = total_energy - mass ; // kinetic energy |
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| 359 | } |
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| 360 | } |
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| 361 | } |
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| 362 | // |
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| 363 | i=1; |
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| 364 | Arb_grad[0] = 0.; |
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| 365 | Arb_cept[0] = 0.; |
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| 366 | Area_seg[0] = 0.; |
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| 367 | Arb_Cum_Area[0] = 0.; |
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| 368 | while(i < maxi) |
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| 369 | { |
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| 370 | // calc gradient and intercept for each segment |
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| 371 | Arb_grad[i] = (Arb_y[i] - Arb_y[i-1]) / (Arb_x[i] - Arb_x[i-1]); |
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| 372 | if(verbosityLevel == 2) |
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| 373 | G4cout << Arb_grad[i] << G4endl; |
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| 374 | if(Arb_grad[i] > 0.) |
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| 375 | { |
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| 376 | if(verbosityLevel == 2) |
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| 377 | G4cout << "Arb_grad is positive" << G4endl; |
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| 378 | Arb_cept[i] = Arb_y[i] - (Arb_grad[i] * Arb_x[i]); |
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| 379 | } |
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| 380 | else if(Arb_grad[i] < 0.) |
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| 381 | { |
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| 382 | if(verbosityLevel == 2) |
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| 383 | G4cout << "Arb_grad is negative" << G4endl; |
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| 384 | Arb_cept[i] = Arb_y[i] + (-Arb_grad[i] * Arb_x[i]); |
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| 385 | } |
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| 386 | else |
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| 387 | { |
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| 388 | if(verbosityLevel == 2) |
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| 389 | G4cout << "Arb_grad is 0." << G4endl; |
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| 390 | Arb_cept[i] = Arb_y[i]; |
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| 391 | } |
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| 392 | |
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| 393 | Area_seg[i] = ((Arb_grad[i]/2)*(Arb_x[i]*Arb_x[i] - Arb_x[i-1]*Arb_x[i-1]) + Arb_cept[i]*(Arb_x[i] - Arb_x[i-1])); |
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| 394 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
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| 395 | sum = sum + Area_seg[i]; |
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| 396 | if(verbosityLevel == 2) |
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| 397 | G4cout << Arb_x[i] << Arb_y[i] << Area_seg[i] << sum << Arb_grad[i] << G4endl; |
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| 398 | i++; |
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| 399 | } |
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| 400 | |
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| 401 | i=0; |
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| 402 | while(i < maxi) |
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| 403 | { |
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| 404 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; // normalisation |
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| 405 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
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| 406 | i++; |
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| 407 | } |
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| 408 | |
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| 409 | if(verbosityLevel >= 1) |
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| 410 | { |
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| 411 | G4cout << "Leaving LinearInterpolation" << G4endl; |
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| 412 | ArbEnergyH.DumpValues(); |
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| 413 | IPDFArbEnergyH.DumpValues(); |
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| 414 | } |
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| 415 | } |
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| 416 | |
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| 417 | void G4SPSEneDistribution::LogInterpolation() |
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| 418 | { |
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| 419 | // Interpolation based on Logarithmic equations |
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| 420 | // Generate equations of line segments |
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| 421 | // y = Ax**alpha => log y = alpha*logx + logA |
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| 422 | // Find area under line segments |
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| 423 | // create normalised, cumulative array Arb_Cum_Area |
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| 424 | G4double Area_seg[1024]; // Stores area under each segment |
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| 425 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
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| 426 | G4int i, count; |
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| 427 | G4int maxi = ArbEnergyH.GetVectorLength(); |
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| 428 | for(i=0;i<maxi;i++) { |
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| 429 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
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| 430 | Arb_y[i] = ArbEnergyH(size_t(i)); |
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| 431 | } |
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| 432 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
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| 433 | // made differential and if momentum it has to be made energy. |
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| 434 | if(DiffSpec == false) { |
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| 435 | // Converts integral point-wise spectra to Differential |
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| 436 | for( count=0;count<maxi-1;count++) { |
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| 437 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
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| 438 | } |
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| 439 | maxi--; |
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| 440 | } |
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| 441 | // |
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| 442 | if(EnergySpec == false) { |
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| 443 | // change currently stored values (emin etc) which are actually momenta |
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| 444 | // to energies. |
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| 445 | if(particle_definition == NULL) |
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| 446 | G4cout << "Error: particle not defined" << G4endl; |
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| 447 | else { |
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| 448 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
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| 449 | // p should be entered as E/c i.e. without the division by c |
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| 450 | // being done - energy equivalent. |
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| 451 | G4double mass = particle_definition->GetPDGMass(); |
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| 452 | // convert point to energy unit and its value to per energy unit |
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| 453 | G4double total_energy; |
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| 454 | for(count=0;count<maxi;count++) { |
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| 455 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
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| 456 | + (mass*mass)); // total energy |
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| 457 | |
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| 458 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
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| 459 | Arb_x[count] = total_energy - mass ; // kinetic energy |
---|
| 460 | } |
---|
| 461 | } |
---|
| 462 | } |
---|
| 463 | // |
---|
| 464 | i=1; |
---|
| 465 | Arb_alpha[0] = 0.; |
---|
| 466 | Arb_Const[0] = 0.; |
---|
| 467 | Area_seg[0] = 0.; |
---|
| 468 | Arb_Cum_Area[0]=0. ; |
---|
| 469 | if(Arb_x[0] <= 0. || Arb_y[0] <= 0.) |
---|
| 470 | { |
---|
| 471 | G4cout << "You should not use log interpolation with points <= 0." << G4endl; |
---|
| 472 | G4cout << "These will be changed to 1e-20, which may cause problems" << G4endl; |
---|
| 473 | if(Arb_x[0] <= 0.) |
---|
| 474 | Arb_x[0] = 1e-20; |
---|
| 475 | if(Arb_y[0] <= 0.) |
---|
| 476 | Arb_y[0] = 1e-20; |
---|
| 477 | } |
---|
| 478 | |
---|
| 479 | G4double alp; |
---|
| 480 | while(i <maxi) |
---|
| 481 | { |
---|
| 482 | // Incase points are negative or zero |
---|
| 483 | if(Arb_x[i] <= 0. || Arb_y[i] <= 0.) |
---|
| 484 | { |
---|
| 485 | G4cout << "You should not use log interpolation with points <= 0." << G4endl; |
---|
| 486 | G4cout << "These will be changed to 1e-20, which may cause problems" << G4endl; |
---|
| 487 | if(Arb_x[i] <= 0.) |
---|
| 488 | Arb_x[i] = 1e-20; |
---|
| 489 | if(Arb_y[i] <= 0.) |
---|
| 490 | Arb_y[i] = 1e-20; |
---|
| 491 | } |
---|
| 492 | |
---|
| 493 | Arb_alpha[i] = (std::log10(Arb_y[i])-std::log10(Arb_y[i-1]))/(std::log10(Arb_x[i])-std::log10(Arb_x[i-1])); |
---|
| 494 | Arb_Const[i] = Arb_y[i]/(std::pow(Arb_x[i],Arb_alpha[i])); |
---|
| 495 | alp = Arb_alpha[i] + 1; |
---|
| 496 | Area_seg[i] = (Arb_Const[i]/alp) * (std::pow(Arb_x[i],alp) - std::pow(Arb_x[i-1],alp)); |
---|
| 497 | sum = sum + Area_seg[i]; |
---|
| 498 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
---|
| 499 | if(verbosityLevel == 2) |
---|
| 500 | G4cout << Arb_alpha[i] << Arb_Const[i] << Area_seg[i] << G4endl; |
---|
| 501 | i++; |
---|
| 502 | } |
---|
| 503 | |
---|
| 504 | i=0; |
---|
| 505 | while(i<maxi) |
---|
| 506 | { |
---|
| 507 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; |
---|
| 508 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
---|
| 509 | i++; |
---|
| 510 | } |
---|
| 511 | if(verbosityLevel >= 1) |
---|
| 512 | G4cout << "Leaving LogInterpolation " << G4endl; |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | void G4SPSEneDistribution::ExpInterpolation() |
---|
| 516 | { |
---|
| 517 | // Interpolation based on Exponential equations |
---|
| 518 | // Generate equations of line segments |
---|
| 519 | // y = Ae**-(x/e0) => ln y = -x/e0 + lnA |
---|
| 520 | // Find area under line segments |
---|
| 521 | // create normalised, cumulative array Arb_Cum_Area |
---|
| 522 | G4double Area_seg[1024]; // Stores area under each segment |
---|
| 523 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
---|
| 524 | G4int i, count; |
---|
| 525 | G4int maxi = ArbEnergyH.GetVectorLength(); |
---|
| 526 | for(i=0;i<maxi;i++) { |
---|
| 527 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
---|
| 528 | Arb_y[i] = ArbEnergyH(size_t(i)); |
---|
| 529 | } |
---|
| 530 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
---|
| 531 | // made differential and if momentum it has to be made energy. |
---|
| 532 | if(DiffSpec == false) { |
---|
| 533 | // Converts integral point-wise spectra to Differential |
---|
| 534 | for( count=0;count< maxi-1;count++) { |
---|
| 535 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
---|
| 536 | } |
---|
| 537 | maxi--; |
---|
| 538 | } |
---|
| 539 | // |
---|
| 540 | if(EnergySpec == false) { |
---|
| 541 | // change currently stored values (emin etc) which are actually momenta |
---|
| 542 | // to energies. |
---|
| 543 | if(particle_definition == NULL) |
---|
| 544 | G4cout << "Error: particle not defined" << G4endl; |
---|
| 545 | else { |
---|
| 546 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
---|
| 547 | // p should be entered as E/c i.e. without the division by c |
---|
| 548 | // being done - energy equivalent. |
---|
| 549 | G4double mass = particle_definition->GetPDGMass(); |
---|
| 550 | // convert point to energy unit and its value to per energy unit |
---|
| 551 | G4double total_energy; |
---|
| 552 | for(count=0;count<maxi;count++) { |
---|
| 553 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
---|
| 554 | + (mass*mass)); // total energy |
---|
| 555 | |
---|
| 556 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
---|
| 557 | Arb_x[count] = total_energy - mass ; // kinetic energy |
---|
| 558 | } |
---|
| 559 | } |
---|
| 560 | } |
---|
| 561 | // |
---|
| 562 | i=1; |
---|
| 563 | Arb_ezero[0] = 0.; |
---|
| 564 | Arb_Const[0] = 0.; |
---|
| 565 | Area_seg[0] = 0.; |
---|
| 566 | Arb_Cum_Area[0] = 0.; |
---|
| 567 | while(i < maxi) |
---|
| 568 | { |
---|
| 569 | G4double test = std::log(Arb_y[i]) - std::log(Arb_y[i-1]); |
---|
| 570 | if(test > 0. || test < 0.) |
---|
| 571 | { |
---|
| 572 | Arb_ezero[i] = -(Arb_x[i] - Arb_x[i-1])/(std::log(Arb_y[i]) - std::log(Arb_y[i-1])); |
---|
| 573 | Arb_Const[i] = Arb_y[i]/(std::exp(-Arb_x[i]/Arb_ezero[i])); |
---|
| 574 | Area_seg[i]=-(Arb_Const[i]*Arb_ezero[i])*(std::exp(-Arb_x[i]/Arb_ezero[i]) |
---|
| 575 | -std::exp(-Arb_x[i-1]/Arb_ezero[i])); |
---|
| 576 | } |
---|
| 577 | else |
---|
| 578 | { |
---|
| 579 | G4cout << "Flat line segment: problem" << G4endl; |
---|
| 580 | Arb_ezero[i] = 0.; |
---|
| 581 | Arb_Const[i] = 0.; |
---|
| 582 | Area_seg[i] = 0.; |
---|
| 583 | } |
---|
| 584 | sum = sum + Area_seg[i]; |
---|
| 585 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
---|
| 586 | if(verbosityLevel == 2) |
---|
| 587 | G4cout << Arb_ezero[i] << Arb_Const[i] << Area_seg[i] << G4endl; |
---|
| 588 | i++; |
---|
| 589 | } |
---|
| 590 | |
---|
| 591 | i=0; |
---|
| 592 | while(i<maxi) |
---|
| 593 | { |
---|
| 594 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; |
---|
| 595 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
---|
| 596 | i++; |
---|
| 597 | } |
---|
| 598 | if(verbosityLevel >= 1) |
---|
| 599 | G4cout << "Leaving ExpInterpolation " << G4endl; |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | void G4SPSEneDistribution::SplineInterpolation() |
---|
| 603 | { |
---|
| 604 | // Interpolation using Splines. |
---|
| 605 | // Create Normalised arrays, make x 0->1 and y hold |
---|
| 606 | // the function (Energy) |
---|
| 607 | G4double Arb_x[1024], Arb_y[1024]; |
---|
| 608 | G4int i, count; |
---|
| 609 | G4int maxi = ArbEnergyH.GetVectorLength(); |
---|
| 610 | for(i=0;i<maxi;i++) { |
---|
| 611 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
---|
| 612 | Arb_y[i] = ArbEnergyH(size_t(i)); |
---|
| 613 | } |
---|
| 614 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
---|
| 615 | // made differential and if momentum it has to be made energy. |
---|
| 616 | if(DiffSpec == false) { |
---|
| 617 | // Converts integral point-wise spectra to Differential |
---|
| 618 | for( count=0;count< maxi-1;count++) { |
---|
| 619 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
---|
| 620 | } |
---|
| 621 | maxi--; |
---|
| 622 | } |
---|
| 623 | // |
---|
| 624 | if(EnergySpec == false) { |
---|
| 625 | // change currently stored values (emin etc) which are actually momenta |
---|
| 626 | // to energies. |
---|
| 627 | if(particle_definition == NULL) |
---|
| 628 | G4cout << "Error: particle not defined" << G4endl; |
---|
| 629 | else { |
---|
| 630 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
---|
| 631 | // p should be entered as E/c i.e. without the division by c |
---|
| 632 | // being done - energy equivalent. |
---|
| 633 | G4double mass = particle_definition->GetPDGMass(); |
---|
| 634 | // convert point to energy unit and its value to per energy unit |
---|
| 635 | G4double total_energy; |
---|
| 636 | for(count=0;count<maxi;count++) { |
---|
| 637 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
---|
| 638 | + (mass*mass)); // total energy |
---|
| 639 | |
---|
| 640 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
---|
| 641 | Arb_x[count] = total_energy - mass ; // kinetic energy |
---|
| 642 | } |
---|
| 643 | } |
---|
| 644 | } |
---|
| 645 | // |
---|
| 646 | for(i=1;i<maxi;i++) |
---|
| 647 | Arb_y[i] += Arb_y[i-1]; |
---|
| 648 | |
---|
| 649 | for(i=0;i<maxi;i++) |
---|
| 650 | Arb_y[i] /= Arb_y[maxi-1]; |
---|
| 651 | // now Arb_y is accumulated normalised probabilities |
---|
| 652 | /* for(i=0; i<maxi;i++) { |
---|
| 653 | if(verbosityLevel >1) |
---|
| 654 | G4cout << i <<" "<< Arb_x[i] << " " << Arb_y[i] << G4endl; |
---|
| 655 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_y[i]); |
---|
| 656 | } |
---|
| 657 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(IPDFArbEnergyH.GetVectorLength()-1); |
---|
| 658 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(0); |
---|
| 659 | */ |
---|
| 660 | // Should now have normalised cumulative probabilities in Arb_y |
---|
| 661 | // and energy values in Arb_x. |
---|
| 662 | // maxi = maxi + 1; |
---|
| 663 | // Put y into x and x into y. The spline interpolation will then |
---|
| 664 | // go through x-axis to find where to interpolate (cum probability) |
---|
| 665 | // then generate a y (which will now be energy). |
---|
| 666 | SplineInt = new G4DataInterpolation(Arb_y,Arb_x,maxi,1e30,1e30); |
---|
| 667 | if(verbosityLevel >1 ) |
---|
| 668 | { |
---|
| 669 | G4cout << SplineInt << G4endl; |
---|
| 670 | G4cout << SplineInt->LocateArgument(1.0) << G4endl; |
---|
| 671 | } |
---|
| 672 | if(verbosityLevel > 0 ) |
---|
| 673 | G4cout << "Leaving SplineInterpolation " << G4endl; |
---|
| 674 | } |
---|
| 675 | |
---|
| 676 | void G4SPSEneDistribution::GenerateMonoEnergetic() |
---|
| 677 | { |
---|
| 678 | // Method to generate MonoEnergetic particles. |
---|
| 679 | particle_energy = MonoEnergy; |
---|
| 680 | } |
---|
| 681 | |
---|
| 682 | void G4SPSEneDistribution::GenerateGaussEnergies() |
---|
| 683 | { |
---|
| 684 | // Method to generate Gaussian particles. |
---|
| 685 | particle_energy = G4RandGauss::shoot(MonoEnergy,SE); |
---|
| 686 | if (particle_energy < 0) particle_energy = 0.; |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | void G4SPSEneDistribution::GenerateLinearEnergies(G4bool bArb = false) |
---|
| 690 | { |
---|
| 691 | G4double rndm; |
---|
| 692 | G4double emaxsq = std::pow(Emax,2.); //Emax squared |
---|
| 693 | G4double eminsq = std::pow(Emin,2.); //Emin squared |
---|
| 694 | G4double intersq = std::pow(cept,2.); //cept squared |
---|
| 695 | |
---|
| 696 | if (bArb) rndm = G4UniformRand(); |
---|
| 697 | else rndm = eneRndm->GenRandEnergy(); |
---|
| 698 | |
---|
| 699 | G4double bracket = ((grad/2.)*(emaxsq - eminsq) + cept*(Emax-Emin)); |
---|
| 700 | bracket = bracket * rndm; |
---|
| 701 | bracket = bracket + (grad/2.)*eminsq + cept*Emin; |
---|
| 702 | // Now have a quad of form m/2 E**2 + cE - bracket = 0 |
---|
| 703 | bracket = -bracket; |
---|
| 704 | // G4cout << "BRACKET" << bracket << G4endl; |
---|
| 705 | if(grad != 0.) |
---|
| 706 | { |
---|
| 707 | G4double sqbrack = (intersq - 4*(grad/2.)*(bracket)); |
---|
| 708 | // G4cout << "SQBRACK" << sqbrack << G4endl; |
---|
| 709 | sqbrack = std::sqrt(sqbrack); |
---|
| 710 | G4double root1 = -cept + sqbrack; |
---|
| 711 | root1 = root1/(2.*(grad/2.)); |
---|
| 712 | |
---|
| 713 | G4double root2 = -cept - sqbrack; |
---|
| 714 | root2 = root2/(2.*(grad/2.)); |
---|
| 715 | |
---|
| 716 | // G4cout << root1 << " roots " << root2 << G4endl; |
---|
| 717 | |
---|
| 718 | if(root1 > Emin && root1 < Emax) |
---|
| 719 | particle_energy = root1; |
---|
| 720 | if(root2 > Emin && root2 < Emax) |
---|
| 721 | particle_energy = root2; |
---|
| 722 | } |
---|
| 723 | else if(grad == 0.) |
---|
| 724 | // have equation of form cE - bracket =0 |
---|
| 725 | particle_energy = bracket/cept; |
---|
| 726 | |
---|
| 727 | if(particle_energy < 0.) |
---|
| 728 | particle_energy = -particle_energy; |
---|
| 729 | |
---|
| 730 | if(verbosityLevel >= 1) |
---|
| 731 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 732 | } |
---|
| 733 | |
---|
| 734 | void G4SPSEneDistribution::GeneratePowEnergies(G4bool bArb = false) |
---|
| 735 | { |
---|
| 736 | // Method to generate particle energies distributed as |
---|
| 737 | // a powerlaw |
---|
| 738 | |
---|
| 739 | G4double rndm; |
---|
| 740 | G4double emina, emaxa; |
---|
| 741 | |
---|
| 742 | emina = std::pow(Emin,alpha+1); |
---|
| 743 | emaxa = std::pow(Emax,alpha+1); |
---|
| 744 | |
---|
| 745 | if (bArb) rndm = G4UniformRand(); |
---|
| 746 | else rndm = eneRndm->GenRandEnergy(); |
---|
| 747 | |
---|
| 748 | if(alpha != -1.) |
---|
| 749 | { |
---|
| 750 | particle_energy = ((rndm*(emaxa - emina)) + emina); |
---|
| 751 | particle_energy = std::pow(particle_energy,(1./(alpha+1.))); |
---|
| 752 | } |
---|
| 753 | else if(alpha == -1.) |
---|
| 754 | { |
---|
| 755 | particle_energy = (std::log(Emin) + rndm*(std::log(Emax) - std::log(Emin))); |
---|
| 756 | particle_energy = std::exp(particle_energy); |
---|
| 757 | } |
---|
| 758 | if(verbosityLevel >= 1) |
---|
| 759 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 760 | } |
---|
| 761 | |
---|
| 762 | void G4SPSEneDistribution::GenerateExpEnergies(G4bool bArb = false) |
---|
| 763 | { |
---|
| 764 | // Method to generate particle energies distributed according |
---|
| 765 | // to an exponential curve. |
---|
| 766 | G4double rndm; |
---|
| 767 | |
---|
| 768 | if (bArb) rndm = G4UniformRand(); |
---|
| 769 | else rndm = eneRndm->GenRandEnergy(); |
---|
| 770 | |
---|
| 771 | particle_energy = -Ezero*(std::log(rndm*(std::exp(-Emax/Ezero) - std::exp(-Emin/Ezero)) + |
---|
| 772 | std::exp(-Emin/Ezero))); |
---|
| 773 | if(verbosityLevel >= 1) |
---|
| 774 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 775 | } |
---|
| 776 | |
---|
| 777 | void G4SPSEneDistribution::GenerateBremEnergies() |
---|
| 778 | { |
---|
| 779 | // Method to generate particle energies distributed according |
---|
| 780 | // to a Bremstrahlung equation of |
---|
| 781 | // form I = const*((kT)**1/2)*E*(e**(-E/kT)) |
---|
| 782 | |
---|
| 783 | G4double rndm; |
---|
| 784 | rndm = eneRndm->GenRandEnergy(); |
---|
| 785 | G4double expmax, expmin, k; |
---|
| 786 | |
---|
| 787 | k = 8.6181e-11; // Boltzmann's const in MeV/K |
---|
| 788 | G4double ksq = std::pow(k,2.); // k squared |
---|
| 789 | G4double Tsq = std::pow(Temp,2.); // Temp squared |
---|
| 790 | |
---|
| 791 | expmax = std::exp(-Emax/(k*Temp)); |
---|
| 792 | expmin = std::exp(-Emin/(k*Temp)); |
---|
| 793 | |
---|
| 794 | // If either expmax or expmin are zero then this will cause problems |
---|
| 795 | // Most probably this will be because T is too low or E is too high |
---|
| 796 | |
---|
| 797 | if(expmax == 0.) |
---|
| 798 | G4cout << "*****EXPMAX=0. Choose different E's or Temp" << G4endl; |
---|
| 799 | if(expmin == 0.) |
---|
| 800 | G4cout << "*****EXPMIN=0. Choose different E's or Temp" << G4endl; |
---|
| 801 | |
---|
| 802 | G4double tempvar = rndm *((-k)*Temp*(Emax*expmax - Emin*expmin) - |
---|
| 803 | (ksq*Tsq*(expmax-expmin))); |
---|
| 804 | |
---|
| 805 | G4double bigc = (tempvar - k*Temp*Emin*expmin - ksq*Tsq*expmin)/(-k*Temp); |
---|
| 806 | |
---|
| 807 | // This gives an equation of form: Ee(-E/kT) + kTe(-E/kT) - C =0 |
---|
| 808 | // Solve this iteratively, step from Emin to Emax in 1000 steps |
---|
| 809 | // and take the best solution. |
---|
| 810 | |
---|
| 811 | G4double erange = Emax - Emin; |
---|
| 812 | G4double steps = erange/1000.; |
---|
| 813 | G4int i; |
---|
| 814 | G4double etest, diff, err; |
---|
| 815 | |
---|
| 816 | err = 100000.; |
---|
| 817 | |
---|
| 818 | for(i=1; i<1000; i++) |
---|
| 819 | { |
---|
| 820 | etest = Emin + (i-1)*steps; |
---|
| 821 | |
---|
| 822 | diff = etest*(std::exp(-etest/(k*Temp))) + k*Temp*(std::exp(-etest/(k*Temp))) - bigc; |
---|
| 823 | |
---|
| 824 | if(diff < 0.) |
---|
| 825 | diff = -diff; |
---|
| 826 | |
---|
| 827 | if(diff < err) |
---|
| 828 | { |
---|
| 829 | err = diff; |
---|
| 830 | particle_energy = etest; |
---|
| 831 | } |
---|
| 832 | } |
---|
| 833 | if(verbosityLevel >= 1) |
---|
| 834 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 835 | } |
---|
| 836 | |
---|
| 837 | void G4SPSEneDistribution::GenerateBbodyEnergies() |
---|
| 838 | { |
---|
| 839 | // BBody_x holds Energies, and BBHist holds the cumulative histo. |
---|
| 840 | // binary search to find correct bin then lin interpolation. |
---|
| 841 | // Use the earlier defined histogram + RandGeneral method to generate |
---|
| 842 | // random numbers following the histos distribution. |
---|
| 843 | G4double rndm; |
---|
| 844 | G4int nabove, nbelow = 0, middle; |
---|
| 845 | nabove = 10001; |
---|
| 846 | rndm = eneRndm->GenRandEnergy(); |
---|
| 847 | |
---|
| 848 | // Binary search to find bin that rndm is in |
---|
| 849 | while(nabove-nbelow > 1) |
---|
| 850 | { |
---|
| 851 | middle = (nabove + nbelow)/2; |
---|
| 852 | if(rndm == BBHist[middle]) break; |
---|
| 853 | if(rndm < BBHist[middle]) nabove = middle; |
---|
| 854 | else nbelow = middle; |
---|
| 855 | } |
---|
| 856 | |
---|
| 857 | // Now interpolate in that bin to find the correct output value. |
---|
| 858 | G4double x1, x2, y1, y2, m, q; |
---|
| 859 | x1 = Bbody_x[nbelow]; |
---|
| 860 | x2 = Bbody_x[nbelow+1]; |
---|
| 861 | y1 = BBHist[nbelow]; |
---|
| 862 | y2 = BBHist[nbelow+1]; |
---|
| 863 | m = (y2-y1)/(x2-x1); |
---|
| 864 | q = y1 - m*x1; |
---|
| 865 | |
---|
| 866 | particle_energy = (rndm - q)/m; |
---|
| 867 | |
---|
| 868 | if(verbosityLevel >= 1) |
---|
| 869 | { |
---|
| 870 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 871 | } |
---|
| 872 | } |
---|
| 873 | |
---|
| 874 | void G4SPSEneDistribution::GenerateCdgEnergies() |
---|
| 875 | { |
---|
| 876 | // Gen random numbers, compare with values in cumhist |
---|
| 877 | // to find appropriate part of spectrum and then |
---|
| 878 | // generate energy in the usual inversion way. |
---|
| 879 | // G4double pfact[2] = {8.5, 112}; |
---|
| 880 | // G4double spind[2] = {1.4, 2.3}; |
---|
| 881 | // G4double ene_line[3] = {1., 18., 1E6}; |
---|
| 882 | G4double rndm, rndm2; |
---|
| 883 | G4double ene_line[3]; |
---|
| 884 | G4double omalpha[2]; |
---|
| 885 | if(Emin < 18*keV && Emax < 18*keV) |
---|
| 886 | { |
---|
| 887 | omalpha[0] = 1. - 1.4; |
---|
| 888 | ene_line[0] = Emin; |
---|
| 889 | ene_line[1] = Emax; |
---|
| 890 | } |
---|
| 891 | if(Emin < 18*keV && Emax > 18*keV) |
---|
| 892 | { |
---|
| 893 | omalpha[0] = 1. - 1.4; |
---|
| 894 | omalpha[1] = 1. - 2.3; |
---|
| 895 | ene_line[0] = Emin; |
---|
| 896 | ene_line[1] = 18.*keV; |
---|
| 897 | ene_line[2] = Emax; |
---|
| 898 | } |
---|
| 899 | if(Emin > 18*keV) |
---|
| 900 | { |
---|
| 901 | omalpha[0] = 1. - 2.3; |
---|
| 902 | ene_line[0] = Emin; |
---|
| 903 | ene_line[1] = Emax; |
---|
| 904 | } |
---|
| 905 | rndm = eneRndm->GenRandEnergy(); |
---|
| 906 | rndm2 = eneRndm->GenRandEnergy(); |
---|
| 907 | |
---|
| 908 | G4int i = 0; |
---|
| 909 | while( rndm >= CDGhist[i]) |
---|
| 910 | { |
---|
| 911 | i++; |
---|
| 912 | } |
---|
| 913 | // Generate final energy. |
---|
| 914 | particle_energy = (std::pow(ene_line[i-1],omalpha[i-1]) + (std::pow(ene_line[i],omalpha[i-1]) |
---|
| 915 | - std::pow(ene_line[i-1],omalpha[i-1]))*rndm2); |
---|
| 916 | particle_energy = std::pow(particle_energy,(1./omalpha[i-1])); |
---|
| 917 | |
---|
| 918 | if(verbosityLevel >= 1) |
---|
| 919 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | void G4SPSEneDistribution::GenUserHistEnergies() |
---|
| 923 | { |
---|
| 924 | // Histograms are DIFFERENTIAL. |
---|
| 925 | // G4cout << "In GenUserHistEnergies " << G4endl; |
---|
| 926 | if(IPDFEnergyExist == false) |
---|
| 927 | { |
---|
| 928 | G4int ii; |
---|
| 929 | G4int maxbin = G4int(UDefEnergyH.GetVectorLength()); |
---|
| 930 | G4double bins[1024], vals[1024], sum; |
---|
| 931 | sum=0.; |
---|
| 932 | |
---|
| 933 | if((EnergySpec == false) && (particle_definition == NULL)) |
---|
| 934 | G4cout << "Error: particle definition is NULL" << G4endl; |
---|
| 935 | |
---|
| 936 | if(maxbin > 1024) |
---|
| 937 | { |
---|
| 938 | G4cout << "Maxbin > 1024" << G4endl; |
---|
| 939 | G4cout << "Setting maxbin to 1024, other bins are lost" << G4endl; |
---|
| 940 | } |
---|
| 941 | |
---|
| 942 | if(DiffSpec == false) |
---|
| 943 | G4cout << "Histograms are Differential!!! " << G4endl; |
---|
| 944 | else |
---|
| 945 | { |
---|
| 946 | bins[0] = UDefEnergyH.GetLowEdgeEnergy(size_t(0)); |
---|
| 947 | vals[0] = UDefEnergyH(size_t(0)); |
---|
| 948 | sum = vals[0]; |
---|
| 949 | for(ii=1;ii<maxbin;ii++) |
---|
| 950 | { |
---|
| 951 | bins[ii] = UDefEnergyH.GetLowEdgeEnergy(size_t(ii)); |
---|
| 952 | vals[ii] = UDefEnergyH(size_t(ii)) + vals[ii-1]; |
---|
| 953 | sum = sum + UDefEnergyH(size_t(ii)); |
---|
| 954 | } |
---|
| 955 | } |
---|
| 956 | |
---|
| 957 | if(EnergySpec == false) |
---|
| 958 | { |
---|
| 959 | G4double mass = particle_definition->GetPDGMass(); |
---|
| 960 | // multiply the function (vals) up by the bin width |
---|
| 961 | // to make the function counts/s (i.e. get rid of momentum |
---|
| 962 | // dependence). |
---|
| 963 | for(ii=1;ii<maxbin;ii++) |
---|
| 964 | { |
---|
| 965 | vals[ii] = vals[ii] * (bins[ii] - bins[ii-1]); |
---|
| 966 | } |
---|
| 967 | // Put energy bins into new histo, plus divide by energy bin width |
---|
| 968 | // to make evals counts/s/energy |
---|
| 969 | for(ii=0;ii<maxbin;ii++) |
---|
| 970 | { |
---|
| 971 | bins[ii] = std::sqrt((bins[ii]*bins[ii]) + (mass*mass)) - mass; //kinetic energy |
---|
| 972 | } |
---|
| 973 | for(ii=1;ii<maxbin;ii++) |
---|
| 974 | { |
---|
| 975 | vals[ii] = vals[ii]/(bins[ii] - bins[ii-1]); |
---|
| 976 | } |
---|
| 977 | sum = vals[maxbin-1]; |
---|
| 978 | vals[0] = 0.; |
---|
| 979 | } |
---|
| 980 | for(ii=0;ii<maxbin;ii++) |
---|
| 981 | { |
---|
| 982 | vals[ii] = vals[ii]/sum; |
---|
| 983 | IPDFEnergyH.InsertValues(bins[ii], vals[ii]); |
---|
| 984 | } |
---|
| 985 | |
---|
| 986 | // Make IPDFEnergyExist = true |
---|
| 987 | IPDFEnergyExist = true; |
---|
| 988 | if(verbosityLevel > 1) |
---|
| 989 | IPDFEnergyH.DumpValues(); |
---|
| 990 | } |
---|
| 991 | |
---|
| 992 | // IPDF has been create so carry on |
---|
| 993 | G4double rndm = eneRndm->GenRandEnergy(); |
---|
| 994 | particle_energy = IPDFEnergyH.GetEnergy(rndm); |
---|
| 995 | |
---|
| 996 | if(verbosityLevel >= 1) |
---|
| 997 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 998 | } |
---|
| 999 | |
---|
| 1000 | void G4SPSEneDistribution::GenArbPointEnergies() |
---|
| 1001 | { |
---|
| 1002 | if(verbosityLevel > 0) |
---|
| 1003 | G4cout << "In GenArbPointEnergies" << G4endl; |
---|
| 1004 | G4double rndm; |
---|
| 1005 | rndm = eneRndm->GenRandEnergy(); |
---|
| 1006 | if(IntType != "Spline") |
---|
| 1007 | { |
---|
| 1008 | // IPDFArbEnergyH.DumpValues(); |
---|
| 1009 | // Find the Bin |
---|
| 1010 | // have x, y, no of points, and cumulative area distribution |
---|
| 1011 | G4int nabove, nbelow = 0, middle; |
---|
| 1012 | nabove = IPDFArbEnergyH.GetVectorLength(); |
---|
| 1013 | // G4cout << nabove << G4endl; |
---|
| 1014 | // Binary search to find bin that rndm is in |
---|
| 1015 | while(nabove-nbelow > 1) |
---|
| 1016 | { |
---|
| 1017 | middle = (nabove + nbelow)/2; |
---|
| 1018 | if(rndm == IPDFArbEnergyH(size_t(middle))) break; |
---|
| 1019 | if(rndm < IPDFArbEnergyH(size_t(middle))) nabove = middle; |
---|
| 1020 | else nbelow = middle; |
---|
| 1021 | } |
---|
| 1022 | if(IntType == "Lin") |
---|
| 1023 | { |
---|
| 1024 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
---|
| 1025 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
---|
| 1026 | grad = Arb_grad[nbelow+1]; |
---|
| 1027 | cept = Arb_cept[nbelow+1]; |
---|
| 1028 | // G4cout << rndm << " " << Emax << " " << Emin << " " << grad << " " << cept << G4endl; |
---|
| 1029 | GenerateLinearEnergies(true); |
---|
| 1030 | } |
---|
| 1031 | else if(IntType == "Log") |
---|
| 1032 | { |
---|
| 1033 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
---|
| 1034 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
---|
| 1035 | alpha = Arb_alpha[nbelow+1]; |
---|
| 1036 | // G4cout << rndm << " " << Emax << " " << Emin << " " << alpha << G4endl; |
---|
| 1037 | GeneratePowEnergies(true); |
---|
| 1038 | } |
---|
| 1039 | else if(IntType == "Exp") |
---|
| 1040 | { |
---|
| 1041 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
---|
| 1042 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
---|
| 1043 | Ezero = Arb_ezero[nbelow+1]; |
---|
| 1044 | // G4cout << rndm << " " << Emax << " " << Emin << " " << Ezero << G4endl; |
---|
| 1045 | GenerateExpEnergies(true); |
---|
| 1046 | } |
---|
| 1047 | } |
---|
| 1048 | else if(IntType == "Spline") |
---|
| 1049 | { |
---|
| 1050 | if(verbosityLevel > 1) |
---|
| 1051 | G4cout << "IntType = Spline " << rndm << G4endl; |
---|
| 1052 | // in SplineInterpolation created SplineInt |
---|
| 1053 | // Now generate a random number put it into CubicSplineInterpolation |
---|
| 1054 | // and you should get out an energy!?! |
---|
| 1055 | particle_energy = -1e100; |
---|
| 1056 | while (particle_energy < Emin || particle_energy > Emax ) { |
---|
| 1057 | particle_energy = SplineInt->CubicSplineInterpolation(rndm); |
---|
| 1058 | rndm = eneRndm->GenRandEnergy(); |
---|
| 1059 | } |
---|
| 1060 | if(verbosityLevel >= 1) |
---|
| 1061 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 1062 | } |
---|
| 1063 | else |
---|
| 1064 | G4cout << "Error: IntType unknown type" << G4endl; |
---|
| 1065 | } |
---|
| 1066 | |
---|
| 1067 | void G4SPSEneDistribution::GenEpnHistEnergies() |
---|
| 1068 | { |
---|
| 1069 | // G4cout << "In GenEpnHistEnergies " << Epnflag << G4endl; |
---|
| 1070 | |
---|
| 1071 | // Firstly convert to energy if not already done. |
---|
| 1072 | if(Epnflag == true) |
---|
| 1073 | // epnflag = true means spectrum is epn, false means e. |
---|
| 1074 | { |
---|
| 1075 | // convert to energy by multiplying by A number |
---|
| 1076 | ConvertEPNToEnergy(); |
---|
| 1077 | // EpnEnergyH will be replace by UDefEnergyH. |
---|
| 1078 | // UDefEnergyH.DumpValues(); |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | // G4cout << "Creating IPDFEnergy if not already done so" << G4endl; |
---|
| 1082 | if(IPDFEnergyExist == false) |
---|
| 1083 | { |
---|
| 1084 | // IPDF has not been created, so create it |
---|
| 1085 | G4double bins[1024],vals[1024], sum; |
---|
| 1086 | G4int ii; |
---|
| 1087 | G4int maxbin = G4int(UDefEnergyH.GetVectorLength()); |
---|
| 1088 | bins[0] = UDefEnergyH.GetLowEdgeEnergy(size_t(0)); |
---|
| 1089 | vals[0] = UDefEnergyH(size_t(0)); |
---|
| 1090 | sum = vals[0]; |
---|
| 1091 | for(ii=1;ii<maxbin;ii++) |
---|
| 1092 | { |
---|
| 1093 | bins[ii] = UDefEnergyH.GetLowEdgeEnergy(size_t(ii)); |
---|
| 1094 | vals[ii] = UDefEnergyH(size_t(ii)) + vals[ii-1]; |
---|
| 1095 | sum = sum + UDefEnergyH(size_t(ii)); |
---|
| 1096 | } |
---|
| 1097 | |
---|
| 1098 | for(ii=0;ii<maxbin;ii++) |
---|
| 1099 | { |
---|
| 1100 | vals[ii] = vals[ii]/sum; |
---|
| 1101 | IPDFEnergyH.InsertValues(bins[ii], vals[ii]); |
---|
| 1102 | } |
---|
| 1103 | // Make IPDFEpnExist = true |
---|
| 1104 | IPDFEnergyExist = true; |
---|
| 1105 | } |
---|
| 1106 | // IPDFEnergyH.DumpValues(); |
---|
| 1107 | // IPDF has been create so carry on |
---|
| 1108 | G4double rndm = eneRndm->GenRandEnergy(); |
---|
| 1109 | particle_energy = IPDFEnergyH.GetEnergy(rndm); |
---|
| 1110 | |
---|
| 1111 | if(verbosityLevel >= 1) |
---|
| 1112 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
| 1113 | } |
---|
| 1114 | |
---|
| 1115 | void G4SPSEneDistribution::ConvertEPNToEnergy() |
---|
| 1116 | { |
---|
| 1117 | // Use this before particle generation to convert the |
---|
| 1118 | // currently stored histogram from energy/nucleon |
---|
| 1119 | // to energy. |
---|
| 1120 | // G4cout << "In ConvertEpntoEnergy " << G4endl; |
---|
| 1121 | if(particle_definition==NULL) |
---|
| 1122 | G4cout << "Error: particle not defined" << G4endl; |
---|
| 1123 | else |
---|
| 1124 | { |
---|
| 1125 | // Need to multiply histogram by the number of nucleons. |
---|
| 1126 | // Baryon Number looks to hold the no. of nucleons. |
---|
| 1127 | G4int Bary = particle_definition->GetBaryonNumber(); |
---|
| 1128 | // G4cout << "Baryon No. " << Bary << G4endl; |
---|
| 1129 | // Change values in histogram, Read it out, delete it, re-create it |
---|
| 1130 | G4int count, maxcount; |
---|
| 1131 | maxcount = G4int(EpnEnergyH.GetVectorLength()); |
---|
| 1132 | // G4cout << maxcount << G4endl; |
---|
| 1133 | G4double ebins[1024],evals[1024]; |
---|
| 1134 | if(maxcount > 1024) |
---|
| 1135 | { |
---|
| 1136 | G4cout << "Histogram contains more than 1024 bins!" << G4endl; |
---|
| 1137 | G4cout << "Those above 1024 will be ignored" << G4endl; |
---|
| 1138 | maxcount = 1024; |
---|
| 1139 | } |
---|
| 1140 | for(count=0;count<maxcount;count++) |
---|
| 1141 | { |
---|
| 1142 | // Read out |
---|
| 1143 | ebins[count] = EpnEnergyH.GetLowEdgeEnergy(size_t(count)); |
---|
| 1144 | evals[count] = EpnEnergyH(size_t(count)); |
---|
| 1145 | } |
---|
| 1146 | |
---|
| 1147 | // Multiply the channels by the nucleon number to give energies |
---|
| 1148 | for(count=0;count<maxcount;count++) |
---|
| 1149 | { |
---|
| 1150 | ebins[count] = ebins[count] * Bary; |
---|
| 1151 | } |
---|
| 1152 | |
---|
| 1153 | // Set Emin and Emax |
---|
| 1154 | Emin = ebins[0]; |
---|
[964] | 1155 | if (maxcount > 1) |
---|
| 1156 | Emax = ebins[maxcount-1]; |
---|
| 1157 | else |
---|
| 1158 | Emax = ebins[0]; |
---|
[816] | 1159 | // Put energy bins into new histogram - UDefEnergyH. |
---|
| 1160 | for(count=0;count<maxcount;count++) |
---|
| 1161 | { |
---|
| 1162 | UDefEnergyH.InsertValues(ebins[count], evals[count]); |
---|
| 1163 | } |
---|
| 1164 | Epnflag = false; //so that you dont repeat this method. |
---|
| 1165 | } |
---|
| 1166 | } |
---|
| 1167 | |
---|
| 1168 | // |
---|
| 1169 | void G4SPSEneDistribution::ReSetHist(G4String atype) |
---|
| 1170 | { |
---|
| 1171 | if (atype == "energy"){ |
---|
| 1172 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
---|
| 1173 | IPDFEnergyExist = false ; |
---|
| 1174 | Emin = 0.; |
---|
| 1175 | Emax = 1e30;} |
---|
| 1176 | else if ( atype == "arb"){ |
---|
| 1177 | ArbEnergyH =IPDFArbEnergyH = ZeroPhysVector ; |
---|
| 1178 | IPDFArbExist = false;} |
---|
| 1179 | else if ( atype == "epn"){ |
---|
| 1180 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
---|
| 1181 | IPDFEnergyExist = false ; |
---|
| 1182 | EpnEnergyH = ZeroPhysVector ;} |
---|
| 1183 | else { |
---|
| 1184 | G4cout << "Error, histtype not accepted " << G4endl; |
---|
| 1185 | } |
---|
| 1186 | } |
---|
| 1187 | |
---|
| 1188 | G4double G4SPSEneDistribution::GenerateOne(G4ParticleDefinition* a) |
---|
| 1189 | { |
---|
| 1190 | particle_definition = a; |
---|
| 1191 | particle_energy = -1.; |
---|
| 1192 | while ( (EnergyDisType == "Arb")? (particle_energy < ArbEmin || particle_energy > ArbEmax) |
---|
| 1193 | : (particle_energy < Emin || particle_energy > Emax) ) { |
---|
| 1194 | if(EnergyDisType == "Mono") |
---|
| 1195 | GenerateMonoEnergetic(); |
---|
| 1196 | else if(EnergyDisType == "Lin") |
---|
| 1197 | GenerateLinearEnergies(); |
---|
| 1198 | else if(EnergyDisType == "Pow") |
---|
| 1199 | GeneratePowEnergies(); |
---|
| 1200 | else if(EnergyDisType == "Exp") |
---|
| 1201 | GenerateExpEnergies(); |
---|
| 1202 | else if(EnergyDisType == "Gauss") |
---|
| 1203 | GenerateGaussEnergies(); |
---|
| 1204 | else if(EnergyDisType == "Brem") |
---|
| 1205 | GenerateBremEnergies(); |
---|
| 1206 | else if(EnergyDisType == "Bbody") |
---|
| 1207 | GenerateBbodyEnergies(); |
---|
| 1208 | else if(EnergyDisType == "Cdg") |
---|
| 1209 | GenerateCdgEnergies(); |
---|
| 1210 | else if(EnergyDisType == "User") |
---|
| 1211 | GenUserHistEnergies(); |
---|
| 1212 | else if(EnergyDisType == "Arb") |
---|
| 1213 | GenArbPointEnergies(); |
---|
| 1214 | else if(EnergyDisType == "Epn") |
---|
| 1215 | GenEpnHistEnergies(); |
---|
| 1216 | else |
---|
| 1217 | G4cout << "Error: EnergyDisType has unusual value" << G4endl; |
---|
| 1218 | } |
---|
| 1219 | return particle_energy; |
---|
| 1220 | } |
---|
| 1221 | |
---|
| 1222 | |
---|
| 1223 | |
---|
| 1224 | |
---|
| 1225 | |
---|
| 1226 | |
---|
| 1227 | |
---|
| 1228 | |
---|
| 1229 | |
---|