[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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[1230] | 27 | // $Id: GammaRayTelPrimaryGeneratorAction.cc,v 1.11 2007/11/09 16:33:34 flongo Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[807] | 29 | // ------------------------------------------------------------ |
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| 30 | // GEANT 4 class implementation file |
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| 31 | // CERN Geneva Switzerland |
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| 32 | // |
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| 33 | // |
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| 34 | // ------------ GammaRayTelPrimaryGeneratorAction ------ |
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| 35 | // by G.Santin, F.Longo & R.Giannitrapani (13 nov 2000) |
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| 36 | // |
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| 37 | // ************************************************************ |
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| 38 | |
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| 39 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 40 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 41 | |
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| 42 | #include "G4RunManager.hh" |
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| 43 | #include "GammaRayTelPrimaryGeneratorAction.hh" |
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| 44 | |
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| 45 | #include "GammaRayTelDetectorConstruction.hh" |
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| 46 | #include "GammaRayTelPrimaryGeneratorMessenger.hh" |
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| 47 | |
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| 48 | #include "G4Event.hh" |
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| 49 | #include "G4ParticleGun.hh" |
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| 50 | #include "G4GeneralParticleSource.hh" |
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| 51 | #include "G4ParticleTable.hh" |
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| 52 | #include "G4ParticleDefinition.hh" |
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| 53 | #include "Randomize.hh" |
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| 54 | |
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| 55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 56 | |
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| 57 | GammaRayTelPrimaryGeneratorAction::GammaRayTelPrimaryGeneratorAction() |
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| 58 | :rndmFlag("off"),nSourceType(0),nSpectrumType(0) |
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| 59 | { |
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| 60 | G4RunManager* runManager = G4RunManager::GetRunManager(); |
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| 61 | GammaRayTelDetector = |
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| 62 | (GammaRayTelDetectorConstruction*)(runManager->GetUserDetectorConstruction()); |
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| 63 | |
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| 64 | |
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| 65 | //create a messenger for this class |
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| 66 | |
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| 67 | gunMessenger = new GammaRayTelPrimaryGeneratorMessenger(this); |
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| 68 | |
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| 69 | G4int n_particle = 1; |
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| 70 | |
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[1230] | 71 | particleGun = new G4ParticleGun(n_particle); |
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[807] | 72 | // default particle kinematic |
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| 73 | |
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[1230] | 74 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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| 75 | G4String particleName; |
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| 76 | G4ParticleDefinition* particle |
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| 77 | = particleTable->FindParticle(particleName="e-"); |
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| 78 | particleGun->SetParticleDefinition(particle); |
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| 79 | particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,-1.)); |
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| 80 | particleGun->SetParticleEnergy(30.*MeV); |
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| 81 | G4double position = 0.5*(GammaRayTelDetector->GetWorldSizeZ()); |
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| 82 | particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position)); |
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| 83 | particleSource = new G4GeneralParticleSource(); |
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| 84 | |
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[807] | 85 | } |
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| 86 | |
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| 87 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 88 | |
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| 89 | GammaRayTelPrimaryGeneratorAction::~GammaRayTelPrimaryGeneratorAction() |
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| 90 | { |
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| 91 | if (sourceGun) |
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| 92 | delete particleGun; |
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| 93 | else |
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| 94 | delete particleSource; |
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| 95 | |
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| 96 | delete gunMessenger; |
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| 97 | } |
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| 98 | |
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| 99 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 100 | |
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| 101 | void GammaRayTelPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
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| 102 | { |
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| 103 | if (sourceGun) |
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| 104 | { |
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| 105 | |
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| 106 | //this function is called at the begining of event |
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| 107 | // |
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| 108 | G4double z0 = 0.5*(GammaRayTelDetector->GetWorldSizeZ()); |
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| 109 | G4double x0 = 0.*cm, y0 = 0.*cm; |
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| 110 | |
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| 111 | G4ThreeVector pos0; |
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| 112 | G4ThreeVector dir0; |
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| 113 | G4ThreeVector vertex0 = G4ThreeVector(x0,y0,z0); |
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| 114 | |
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| 115 | dir0 = G4ThreeVector(0.,0.,-1.); |
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| 116 | |
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| 117 | G4double theta, phi, y, f; |
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| 118 | G4double theta0=0.; |
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| 119 | G4double phi0=0.; |
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| 120 | |
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| 121 | switch(nSourceType) { |
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| 122 | case 0: |
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| 123 | particleGun->SetParticlePosition(vertex0); |
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| 124 | particleGun->SetParticleMomentumDirection(dir0); |
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| 125 | break; |
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| 126 | case 1: |
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| 127 | // GS: Generate random position on the 4PIsphere to create a unif. distrib. |
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| 128 | // GS: on the sphere |
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| 129 | phi = G4UniformRand() * twopi; |
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| 130 | do { |
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| 131 | y = G4UniformRand()*1.0; |
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| 132 | theta = G4UniformRand() * pi; |
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| 133 | f = std::sin(theta); |
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| 134 | } while (y > f); |
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| 135 | vertex0 = G4ThreeVector(1.,0.,0.); |
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| 136 | vertex0.setMag(dVertexRadius); |
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| 137 | vertex0.setTheta(theta); |
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| 138 | vertex0.setPhi(phi); |
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| 139 | particleGun->SetParticlePosition(vertex0); |
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| 140 | |
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| 141 | dir0 = G4ThreeVector(1.,0.,0.); |
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| 142 | do { |
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| 143 | phi = G4UniformRand() * twopi; |
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| 144 | do { |
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| 145 | y = G4UniformRand()*1.0; |
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| 146 | theta = G4UniformRand() * pi; |
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| 147 | f = std::sin(theta); |
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| 148 | } while (y > f); |
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| 149 | dir0.setPhi(phi); |
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| 150 | dir0.setTheta(theta); |
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| 151 | } while (vertex0.dot(dir0) >= -0.7 * vertex0.mag()); |
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| 152 | particleGun->SetParticleMomentumDirection((G4ParticleMomentum)dir0); |
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| 153 | |
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| 154 | break; |
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| 155 | case 2: |
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| 156 | // GS: Generate random position on the upper semi-sphere z>0 to create a unif. distrib. |
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| 157 | // GS: on a plane |
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| 158 | phi = G4UniformRand() * twopi; |
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| 159 | do { |
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| 160 | y = G4UniformRand()*1.0; |
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| 161 | theta = G4UniformRand() * halfpi; |
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| 162 | f = std::sin(theta) * std::cos(theta); |
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| 163 | } while (y > f); |
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| 164 | vertex0 = G4ThreeVector(1.,0.,0.); |
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| 165 | |
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| 166 | G4double xy = GammaRayTelDetector->GetWorldSizeXY(); |
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| 167 | G4double z = GammaRayTelDetector->GetWorldSizeZ(); |
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| 168 | |
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| 169 | if (dVertexRadius > xy*0.5) |
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| 170 | { |
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| 171 | G4cout << "vertexRadius too big " << G4endl; |
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| 172 | G4cout << "vertexRadius setted to " << xy*0.45 << G4endl; |
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| 173 | dVertexRadius = xy*0.45; |
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| 174 | } |
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| 175 | |
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| 176 | if (dVertexRadius > z*0.5) |
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| 177 | { |
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| 178 | G4cout << "vertexRadius too high " << G4endl; |
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| 179 | G4cout << "vertexRadius setted to " << z*0.45 << G4endl; |
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| 180 | dVertexRadius = z*0.45; |
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| 181 | } |
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| 182 | |
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| 183 | |
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| 184 | vertex0.setMag(dVertexRadius); |
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| 185 | vertex0.setTheta(theta); |
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| 186 | vertex0.setPhi(phi); |
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| 187 | |
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| 188 | // GS: Get the user defined direction for the primaries and |
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| 189 | // GS: Rotate the random position according to the user defined direction for the particle |
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| 190 | |
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| 191 | dir0 = particleGun->GetParticleMomentumDirection(); |
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| 192 | if (dir0.mag() > 0.001) |
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| 193 | { |
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| 194 | theta0 = dir0.theta(); |
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| 195 | phi0 = dir0.phi(); |
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| 196 | } |
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| 197 | |
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| 198 | if (theta0!=0.) |
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| 199 | { |
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| 200 | G4ThreeVector rotationAxis(1.,0.,0.); |
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| 201 | rotationAxis.setPhi(phi0+halfpi); |
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| 202 | vertex0.rotate(theta0+pi,rotationAxis); |
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| 203 | } |
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| 204 | particleGun->SetParticlePosition(vertex0); |
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| 205 | break; |
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| 206 | } |
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| 207 | |
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| 208 | |
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| 209 | G4double pEnergy; |
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| 210 | |
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| 211 | switch(nSpectrumType) { |
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| 212 | case 0: |
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| 213 | break; |
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| 214 | case 1: |
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| 215 | break; |
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| 216 | case 2: |
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| 217 | do { |
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| 218 | y = G4UniformRand()*100000.0; |
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| 219 | pEnergy = G4UniformRand() * 10. * GeV; |
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| 220 | f = std::pow(pEnergy * (1/GeV), -4.); |
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| 221 | } while (y > f); |
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| 222 | |
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| 223 | particleGun->SetParticleEnergy(pEnergy); |
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| 224 | |
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| 225 | break; |
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| 226 | case 3: |
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| 227 | break; |
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| 228 | } |
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| 229 | |
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| 230 | particleGun->GeneratePrimaryVertex(anEvent); |
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| 231 | } |
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| 232 | else |
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| 233 | { |
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| 234 | particleSource->GeneratePrimaryVertex(anEvent); |
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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 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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