Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 /// \file exoticphysics/ucn/src/ExUCNPrimaryGe 28 /// \brief Implementation of the ExUCNPrimaryG 29 // 30 31 //....oooOO0OOooo........oooOO0OOooo........oo 32 //....oooOO0OOooo........oooOO0OOooo........oo 33 34 #include "ExUCNPrimaryGeneratorAction.hh" 35 36 #include "ExUCNDetectorConstruction.hh" 37 38 #include "G4Event.hh" 39 #include "G4ParticleDefinition.hh" 40 #include "G4ParticleGun.hh" 41 #include "G4ParticleTable.hh" 42 #include "G4PhysicalConstants.hh" 43 #include "G4SystemOfUnits.hh" 44 #include "Randomize.hh" 45 46 //....oooOO0OOooo........oooOO0OOooo........oo 47 48 ExUCNPrimaryGeneratorAction::ExUCNPrimaryGener 49 { 50 G4int n_particle = 1; 51 fParticleGun = new G4ParticleGun(n_particle) 52 53 G4ParticleTable* particleTable = G4ParticleT 54 55 G4ParticleDefinition* particle = particleTab 56 fParticleGun->SetParticleDefinition(particle 57 } 58 59 //....oooOO0OOooo........oooOO0OOooo........oo 60 61 ExUCNPrimaryGeneratorAction::~ExUCNPrimaryGene 62 { 63 delete fParticleGun; 64 } 65 66 //....oooOO0OOooo........oooOO0OOooo........oo 67 68 void ExUCNPrimaryGeneratorAction::GeneratePrim 69 { 70 // This function is called at the begining o 71 72 fParticleGun->SetParticlePosition(G4ThreeVec 73 fParticleGun->SetParticlePolarization(G4Thre 74 75 G4double particleEnergy = 1e-9 * eV + G4Unif 76 fParticleGun->SetParticleEnergy(particleEner 77 78 G4double theta = 2 * pi * G4UniformRand(); 79 G4double phi = std::acos(1 - 2 * G4UniformRa 80 if (phi > pi / 2 && phi < pi) phi = pi - phi 81 82 G4double z = std::sin(phi) * std::cos(theta) 83 G4double x = std::sin(phi) * std::sin(theta) 84 G4double y = std::cos(phi); 85 86 fParticleGun->SetParticleMomentumDirection(G 87 88 fParticleGun->GeneratePrimaryVertex(anEvent) 89 } 90 91 //....oooOO0OOooo........oooOO0OOooo........oo 92