[807] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // -------------------------------------------------------------- |
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| 28 | // GEANT 4 - Underground Dark Matter Detector Advanced Example |
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| 29 | // |
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| 30 | // For information related to this code contact: Alex Howard |
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| 31 | // e-mail: alexander.howard@cern.ch |
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| 32 | // -------------------------------------------------------------- |
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| 33 | // Comments |
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| 34 | // |
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| 35 | // Underground Advanced |
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| 36 | // by A. Howard and H. Araujo |
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| 37 | // (27th November 2001) |
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| 38 | // |
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| 39 | // |
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| 40 | // ParticleSource program |
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| 41 | // -------------------------------------------------------------- |
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| 42 | ////////////////////////////////////////////////////////////////////////////// |
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| 43 | // This particle source is a shortened version of G4GeneralParticleSource by |
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| 44 | // C Ferguson, F Lei & P Truscott (University of Southampton / DERA), with |
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| 45 | // some minor modifications. |
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| 46 | ////////////////////////////////////////////////////////////////////////////// |
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| 47 | |
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| 48 | #include "DMXParticleSource.hh" |
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| 49 | |
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| 50 | #include "G4PrimaryParticle.hh" |
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| 51 | #include "G4Event.hh" |
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| 52 | #include "Randomize.hh" |
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| 53 | #include <cmath> |
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| 54 | #include "G4TransportationManager.hh" |
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| 55 | #include "G4VPhysicalVolume.hh" |
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| 56 | #include "G4PhysicalVolumeStore.hh" |
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| 57 | #include "G4ParticleTable.hh" |
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| 58 | #include "G4ParticleDefinition.hh" |
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| 59 | #include "G4IonTable.hh" |
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| 60 | #include "G4Ions.hh" |
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| 61 | #include "G4TrackingManager.hh" |
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| 62 | #include "G4Track.hh" |
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| 63 | |
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| 64 | |
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| 65 | DMXParticleSource::DMXParticleSource() { |
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| 66 | |
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| 67 | NumberOfParticlesToBeGenerated = 1; |
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| 68 | particle_definition = NULL; |
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| 69 | G4ThreeVector zero(0., 0., 0.); |
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| 70 | particle_momentum_direction = G4ParticleMomentum(1., 0., 0.); |
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| 71 | particle_energy = 1.0*MeV; |
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| 72 | particle_position = zero; |
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| 73 | particle_time = 0.0; |
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| 74 | particle_polarization = zero; |
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| 75 | particle_charge = 0.0; |
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| 76 | |
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| 77 | SourcePosType = "Volume"; |
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| 78 | Shape = "NULL"; |
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| 79 | halfz = 0.; |
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| 80 | Radius = 0.; |
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| 81 | CentreCoords = zero; |
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| 82 | Confine = false; |
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| 83 | VolName = "NULL"; |
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| 84 | |
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| 85 | AngDistType = "iso"; |
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| 86 | MinTheta = 0.; |
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| 87 | MaxTheta = pi; |
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| 88 | MinPhi = 0.; |
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| 89 | MaxPhi = twopi; |
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| 90 | |
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| 91 | EnergyDisType = "Mono"; |
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| 92 | MonoEnergy = 1*MeV; |
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| 93 | |
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| 94 | verbosityLevel = 0; |
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| 95 | |
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| 96 | theMessenger = new DMXParticleSourceMessenger(this); |
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| 97 | gNavigator = G4TransportationManager::GetTransportationManager() |
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| 98 | ->GetNavigatorForTracking(); |
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| 99 | } |
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| 100 | |
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| 101 | DMXParticleSource::~DMXParticleSource() |
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| 102 | { |
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| 103 | delete theMessenger; |
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| 104 | } |
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| 105 | |
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| 106 | void DMXParticleSource::SetPosDisType(G4String PosType) |
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| 107 | { |
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| 108 | SourcePosType = PosType; |
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| 109 | } |
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| 110 | |
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| 111 | void DMXParticleSource::SetPosDisShape(G4String shapeType) |
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| 112 | { |
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| 113 | Shape = shapeType; |
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| 114 | } |
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| 115 | |
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| 116 | void DMXParticleSource::SetCentreCoords(G4ThreeVector coordsOfCentre) |
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| 117 | { |
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| 118 | CentreCoords = coordsOfCentre; |
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| 119 | } |
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| 120 | |
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| 121 | void DMXParticleSource::SetHalfZ(G4double zhalf) |
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| 122 | { |
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| 123 | halfz = zhalf; |
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| 124 | } |
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| 125 | |
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| 126 | void DMXParticleSource::SetRadius(G4double rad) |
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| 127 | { |
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| 128 | Radius = rad; |
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| 129 | } |
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| 130 | |
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| 131 | void DMXParticleSource::ConfineSourceToVolume(G4String Vname) |
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| 132 | { |
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| 133 | VolName = Vname; |
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| 134 | if(verbosityLevel == 2) G4cout << VolName << G4endl; |
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| 135 | |
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| 136 | // checks if selected volume exists |
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| 137 | G4VPhysicalVolume *tempPV = NULL; |
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| 138 | G4PhysicalVolumeStore *PVStore = 0; |
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| 139 | G4String theRequiredVolumeName = VolName; |
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| 140 | PVStore = G4PhysicalVolumeStore::GetInstance(); |
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| 141 | G4int i = 0; |
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| 142 | G4bool found = false; |
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| 143 | if(verbosityLevel == 2) G4cout << PVStore->size() << G4endl; |
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| 144 | |
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| 145 | // recasting required since PVStore->size() is actually a signed int... |
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| 146 | while (!found && i<(G4int)PVStore->size()) |
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| 147 | { |
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| 148 | tempPV = (*PVStore)[i]; |
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| 149 | found = tempPV->GetName() == theRequiredVolumeName; |
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| 150 | if(verbosityLevel == 2) |
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| 151 | G4cout << i << " " << " " << tempPV->GetName() |
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| 152 | << " " << theRequiredVolumeName << " " << found << G4endl; |
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| 153 | if (!found) |
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| 154 | {i++;} |
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| 155 | } |
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| 156 | |
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| 157 | // found = true then the volume exists else it doesnt. |
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| 158 | if(found == true) { |
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| 159 | if(verbosityLevel >= 1) |
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| 160 | G4cout << "Volume " << VolName << " exists" << G4endl; |
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| 161 | Confine = true; |
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| 162 | } |
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| 163 | else if(VolName=="NULL") |
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| 164 | Confine = false; |
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| 165 | else { |
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| 166 | G4cout << " **** Error: Volume does not exist **** " << G4endl; |
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| 167 | G4cout << " Ignoring confine condition" << G4endl; |
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| 168 | VolName = "NULL"; |
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| 169 | Confine = false; |
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| 170 | } |
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| 171 | |
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| 172 | } |
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| 173 | |
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| 174 | |
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| 175 | void DMXParticleSource::SetAngDistType(G4String atype) |
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| 176 | { |
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| 177 | AngDistType = atype; |
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| 178 | } |
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| 179 | |
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| 180 | |
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| 181 | void DMXParticleSource::GeneratePointSource() |
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| 182 | { |
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| 183 | // Generates Points given the point source. |
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| 184 | if(SourcePosType == "Point") |
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| 185 | particle_position = CentreCoords; |
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| 186 | else |
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| 187 | if(verbosityLevel >= 1) |
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| 188 | G4cout << "Error SourcePosType is not set to Point" << G4endl; |
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| 189 | } |
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| 190 | |
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| 191 | |
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| 192 | void DMXParticleSource::GeneratePointsInVolume() |
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| 193 | { |
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| 194 | G4ThreeVector RandPos; |
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| 195 | G4double x=0., y=0., z=0.; |
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| 196 | |
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| 197 | if(SourcePosType != "Volume" && verbosityLevel >= 1) |
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| 198 | G4cout << "Error SourcePosType not Volume" << G4endl; |
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| 199 | |
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| 200 | if(Shape == "Sphere") { |
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| 201 | x = Radius*2.; |
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| 202 | y = Radius*2.; |
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| 203 | z = Radius*2.; |
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| 204 | while(((x*x)+(y*y)+(z*z)) > (Radius*Radius)) { |
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| 205 | x = G4UniformRand(); |
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| 206 | y = G4UniformRand(); |
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| 207 | z = G4UniformRand(); |
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| 208 | |
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| 209 | x = (x*2.*Radius) - Radius; |
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| 210 | y = (y*2.*Radius) - Radius; |
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| 211 | z = (z*2.*Radius) - Radius; |
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| 212 | } |
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| 213 | } |
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| 214 | |
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| 215 | else if(Shape == "Cylinder") { |
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| 216 | x = Radius*2.; |
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| 217 | y = Radius*2.; |
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| 218 | while(((x*x)+(y*y)) > (Radius*Radius)) { |
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| 219 | x = G4UniformRand(); |
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| 220 | y = G4UniformRand(); |
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| 221 | z = G4UniformRand(); |
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| 222 | x = (x*2.*Radius) - Radius; |
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| 223 | y = (y*2.*Radius) - Radius; |
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| 224 | z = (z*2.*halfz) - halfz; |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | else |
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| 229 | G4cout << "Error: Volume Shape Does Not Exist" << G4endl; |
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| 230 | |
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| 231 | RandPos.setX(x); |
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| 232 | RandPos.setY(y); |
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| 233 | RandPos.setZ(z); |
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| 234 | particle_position = CentreCoords + RandPos; |
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| 235 | |
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| 236 | } |
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| 237 | |
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| 238 | |
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| 239 | G4bool DMXParticleSource::IsSourceConfined() |
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| 240 | { |
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| 241 | |
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| 242 | // Method to check point is within the volume specified |
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| 243 | if(Confine == false) |
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| 244 | G4cout << "Error: Confine is false" << G4endl; |
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| 245 | G4ThreeVector null(0.,0.,0.); |
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| 246 | G4ThreeVector *ptr; |
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| 247 | ptr = &null; |
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| 248 | |
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| 249 | // Check particle_position is within VolName |
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| 250 | G4VPhysicalVolume *theVolume; |
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| 251 | theVolume=gNavigator->LocateGlobalPointAndSetup(particle_position,ptr,true); |
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| 252 | G4String theVolName = theVolume->GetName(); |
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| 253 | if(theVolName == VolName) { |
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| 254 | if(verbosityLevel >= 1) |
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| 255 | G4cout << "Particle is in volume " << VolName << G4endl; |
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| 256 | return(true); |
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| 257 | } |
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| 258 | else |
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| 259 | return(false); |
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| 260 | } |
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| 261 | |
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| 262 | |
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| 263 | void DMXParticleSource::SetParticleMomentumDirection |
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| 264 | (G4ParticleMomentum aDirection) { |
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| 265 | |
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| 266 | particle_momentum_direction = aDirection.unit(); |
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| 267 | } |
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| 268 | |
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| 269 | |
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| 270 | void DMXParticleSource::GenerateIsotropicFlux() |
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| 271 | { |
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| 272 | |
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| 273 | G4double rndm, rndm2; |
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| 274 | G4double px, py, pz; |
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| 275 | |
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| 276 | G4double sintheta, sinphi, costheta, cosphi; |
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| 277 | rndm = G4UniformRand(); |
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| 278 | costheta = std::cos(MinTheta) - rndm * (std::cos(MinTheta) - std::cos(MaxTheta)); |
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| 279 | sintheta = std::sqrt(1. - costheta*costheta); |
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| 280 | |
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| 281 | rndm2 = G4UniformRand(); |
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| 282 | Phi = MinPhi + (MaxPhi - MinPhi) * rndm2; |
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| 283 | sinphi = std::sin(Phi); |
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| 284 | cosphi = std::cos(Phi); |
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| 285 | |
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| 286 | px = -sintheta * cosphi; |
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| 287 | py = -sintheta * sinphi; |
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| 288 | pz = -costheta; |
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| 289 | |
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| 290 | G4double ResMag = std::sqrt((px*px) + (py*py) + (pz*pz)); |
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| 291 | px = px/ResMag; |
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| 292 | py = py/ResMag; |
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| 293 | pz = pz/ResMag; |
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| 294 | |
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| 295 | particle_momentum_direction.setX(px); |
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| 296 | particle_momentum_direction.setY(py); |
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| 297 | particle_momentum_direction.setZ(pz); |
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| 298 | |
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| 299 | // particle_momentum_direction now holds unit momentum vector. |
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| 300 | if(verbosityLevel >= 2) |
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| 301 | G4cout << "Generating isotropic vector: " << particle_momentum_direction << G4endl; |
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| 302 | } |
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| 303 | |
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| 304 | |
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| 305 | void DMXParticleSource::SetEnergyDisType(G4String DisType) |
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| 306 | { |
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| 307 | EnergyDisType = DisType; |
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| 308 | } |
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| 309 | |
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| 310 | void DMXParticleSource::SetMonoEnergy(G4double menergy) |
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| 311 | { |
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| 312 | MonoEnergy = menergy; |
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| 313 | } |
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| 314 | |
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| 315 | void DMXParticleSource::GenerateMonoEnergetic() |
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| 316 | { |
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| 317 | particle_energy = MonoEnergy; |
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| 318 | } |
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| 319 | |
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| 320 | |
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| 321 | void DMXParticleSource::SetVerbosity(int vL) |
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| 322 | { |
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| 323 | verbosityLevel = vL; |
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| 324 | G4cout << "Verbosity Set to: " << verbosityLevel << G4endl; |
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| 325 | } |
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| 326 | |
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| 327 | void DMXParticleSource::SetParticleDefinition |
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| 328 | (G4ParticleDefinition* aParticleDefinition) |
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| 329 | { |
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| 330 | particle_definition = aParticleDefinition; |
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| 331 | particle_charge = particle_definition->GetPDGCharge(); |
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| 332 | } |
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| 333 | |
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| 334 | |
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| 335 | void DMXParticleSource::GeneratePrimaryVertex(G4Event *evt) |
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| 336 | { |
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| 337 | |
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| 338 | if(particle_definition==NULL) { |
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| 339 | G4cout << "No particle has been defined!" << G4endl; |
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| 340 | return; |
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| 341 | } |
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| 342 | |
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| 343 | // Position |
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| 344 | G4bool srcconf = false; |
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| 345 | G4int LoopCount = 0; |
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| 346 | |
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| 347 | while(srcconf == false) { |
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| 348 | if(SourcePosType == "Point") |
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| 349 | GeneratePointSource(); |
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| 350 | else if(SourcePosType == "Volume") |
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| 351 | GeneratePointsInVolume(); |
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| 352 | else { |
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| 353 | G4cout << "Error: SourcePosType undefined" << G4endl; |
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| 354 | G4cout << "Generating point source" << G4endl; |
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| 355 | GeneratePointSource(); |
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| 356 | } |
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| 357 | if(Confine == true) { |
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| 358 | srcconf = IsSourceConfined(); |
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| 359 | // if source in confined srcconf = true terminating the loop |
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| 360 | // if source isnt confined srcconf = false and loop continues |
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| 361 | } |
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| 362 | else if(Confine == false) |
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| 363 | srcconf = true; // terminate loop |
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| 364 | |
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| 365 | LoopCount++; |
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| 366 | if(LoopCount == 100000) { |
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| 367 | G4cout << "*************************************" << G4endl; |
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| 368 | G4cout << "LoopCount = 100000" << G4endl; |
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| 369 | G4cout << "Either the source distribution >> confinement" << G4endl; |
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| 370 | G4cout << "or any confining volume may not overlap with" << G4endl; |
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| 371 | G4cout << "the source distribution or any confining volumes" << G4endl; |
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| 372 | G4cout << "may not exist"<< G4endl; |
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| 373 | G4cout << "If you have set confine then this will be ignored" <<G4endl; |
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| 374 | G4cout << "for this event." << G4endl; |
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| 375 | G4cout << "*************************************" << G4endl; |
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| 376 | srcconf = true; //Avoids an infinite loop |
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| 377 | } |
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| 378 | } |
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| 379 | |
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| 380 | // Angular stuff |
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| 381 | if(AngDistType == "iso") |
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| 382 | GenerateIsotropicFlux(); |
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| 383 | else if(AngDistType == "direction") |
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| 384 | SetParticleMomentumDirection(particle_momentum_direction); |
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| 385 | else |
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| 386 | G4cout << "Error: AngDistType has unusual value" << G4endl; |
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| 387 | // Energy stuff |
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| 388 | if(EnergyDisType == "Mono") |
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| 389 | GenerateMonoEnergetic(); |
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| 390 | else |
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| 391 | G4cout << "Error: EnergyDisType has unusual value" << G4endl; |
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| 392 | |
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| 393 | // create a new vertex |
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| 394 | G4PrimaryVertex* vertex = |
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| 395 | new G4PrimaryVertex(particle_position,particle_time); |
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| 396 | |
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| 397 | if(verbosityLevel >= 2) |
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| 398 | G4cout << "Creating primaries and assigning to vertex" << G4endl; |
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| 399 | // create new primaries and set them to the vertex |
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| 400 | G4double mass = particle_definition->GetPDGMass(); |
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| 401 | G4double energy = particle_energy + mass; |
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| 402 | G4double pmom = std::sqrt(energy*energy-mass*mass); |
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| 403 | G4double px = pmom*particle_momentum_direction.x(); |
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| 404 | G4double py = pmom*particle_momentum_direction.y(); |
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| 405 | G4double pz = pmom*particle_momentum_direction.z(); |
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| 406 | |
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| 407 | if(verbosityLevel >= 1){ |
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| 408 | G4cout << "Particle name: " |
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| 409 | << particle_definition->GetParticleName() << G4endl; |
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| 410 | G4cout << " Energy: "<<particle_energy << G4endl; |
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| 411 | G4cout << " Position: "<<particle_position<< G4endl; |
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| 412 | G4cout << " Direction: "<<particle_momentum_direction << G4endl; |
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| 413 | G4cout << " NumberOfParticlesToBeGenerated: " |
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| 414 | << NumberOfParticlesToBeGenerated << G4endl; |
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| 415 | } |
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| 416 | |
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| 417 | |
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| 418 | for( G4int i=0; i<NumberOfParticlesToBeGenerated; i++ ) { |
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| 419 | G4PrimaryParticle* particle = |
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| 420 | new G4PrimaryParticle(particle_definition,px,py,pz); |
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| 421 | particle->SetMass( mass ); |
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| 422 | particle->SetCharge( particle_charge ); |
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| 423 | particle->SetPolarization(particle_polarization.x(), |
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| 424 | particle_polarization.y(), |
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| 425 | particle_polarization.z()); |
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| 426 | vertex->SetPrimary( particle ); |
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| 427 | } |
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| 428 | evt->AddPrimaryVertex( vertex ); |
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| 429 | if(verbosityLevel > 1) |
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| 430 | G4cout << " Primary Vetex generated "<< G4endl; |
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| 431 | } |
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| 432 | |
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| 433 | |
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| 434 | |
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| 435 | |
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