[807] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | // $Id: A01PrimaryGeneratorAction.cc,v 1.5 2006/06/29 16:33:05 gunter Exp $ |
---|
| 27 | // -------------------------------------------------------------- |
---|
| 28 | // |
---|
| 29 | |
---|
| 30 | #include "A01PrimaryGeneratorAction.hh" |
---|
| 31 | #include "A01PrimaryGeneratorMessenger.hh" |
---|
| 32 | |
---|
| 33 | #include "G4Event.hh" |
---|
| 34 | #include "G4ParticleGun.hh" |
---|
| 35 | #include "G4ParticleTable.hh" |
---|
| 36 | #include "G4ParticleDefinition.hh" |
---|
| 37 | #include "Randomize.hh" |
---|
| 38 | |
---|
| 39 | A01PrimaryGeneratorAction::A01PrimaryGeneratorAction() |
---|
| 40 | { |
---|
| 41 | momentum = 1000.*MeV; |
---|
| 42 | sigmaMomentum = 50.*MeV; |
---|
| 43 | sigmaAngle = 2.*deg; |
---|
| 44 | randomizePrimary = true; |
---|
| 45 | |
---|
| 46 | G4int n_particle = 1; |
---|
| 47 | particleGun = new G4ParticleGun(n_particle); |
---|
| 48 | |
---|
| 49 | //create a messenger for this class |
---|
| 50 | gunMessenger = new A01PrimaryGeneratorMessenger(this); |
---|
| 51 | |
---|
| 52 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
---|
| 53 | G4String particleName; |
---|
| 54 | positron = particleTable->FindParticle(particleName="e+"); |
---|
| 55 | muon = particleTable->FindParticle(particleName="mu+"); |
---|
| 56 | pion = particleTable->FindParticle(particleName="pi+"); |
---|
| 57 | kaon = particleTable->FindParticle(particleName="kaon+"); |
---|
| 58 | proton = particleTable->FindParticle(particleName="proton"); |
---|
| 59 | |
---|
| 60 | // default particle kinematics |
---|
| 61 | particleGun->SetParticlePosition(G4ThreeVector(0.,0.,-8.*m)); |
---|
| 62 | particleGun->SetParticleDefinition(positron); |
---|
| 63 | } |
---|
| 64 | |
---|
| 65 | A01PrimaryGeneratorAction::~A01PrimaryGeneratorAction() |
---|
| 66 | { |
---|
| 67 | delete particleGun; |
---|
| 68 | delete gunMessenger; |
---|
| 69 | } |
---|
| 70 | |
---|
| 71 | void A01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
---|
| 72 | { |
---|
| 73 | G4ParticleDefinition* particle; |
---|
| 74 | |
---|
| 75 | if(randomizePrimary) |
---|
| 76 | { |
---|
| 77 | /////////////////////////////////////////////G4int i = (int)(5.*G4UniformRand()); |
---|
| 78 | G4int i = (int)(2.*G4UniformRand()); |
---|
| 79 | switch(i) |
---|
| 80 | { |
---|
| 81 | case 0: |
---|
| 82 | particle = positron; |
---|
| 83 | break; |
---|
| 84 | case 1: |
---|
| 85 | particle = muon; |
---|
| 86 | break; |
---|
| 87 | case 2: |
---|
| 88 | particle = pion; |
---|
| 89 | break; |
---|
| 90 | case 3: |
---|
| 91 | particle = kaon; |
---|
| 92 | break; |
---|
| 93 | default: |
---|
| 94 | particle = proton; |
---|
| 95 | break; |
---|
| 96 | } |
---|
| 97 | particleGun->SetParticleDefinition(particle); |
---|
| 98 | } |
---|
| 99 | else |
---|
| 100 | { |
---|
| 101 | particle = particleGun->GetParticleDefinition(); |
---|
| 102 | } |
---|
| 103 | |
---|
| 104 | G4double pp = momentum + (G4UniformRand()-0.5)*sigmaMomentum; |
---|
| 105 | G4double mass = particle->GetPDGMass(); |
---|
| 106 | G4double Ekin = std::sqrt(pp*pp+mass*mass)-mass; |
---|
| 107 | particleGun->SetParticleEnergy(Ekin); |
---|
| 108 | |
---|
| 109 | G4double angle = (G4UniformRand()-0.5)*sigmaAngle; |
---|
| 110 | particleGun->SetParticleMomentumDirection(G4ThreeVector(std::sin(angle),0.,std::cos(angle))); |
---|
| 111 | |
---|
| 112 | particleGun->GeneratePrimaryVertex(anEvent); |
---|
| 113 | } |
---|
| 114 | |
---|