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 // Code developed by 27 // Silvia Pozzi (1), silvia.pozzi@iss.it 28 // Barbara Caccia (1), barbara.caccia@iss.it 29 // Carlo Mancini Terracciano (2), carlo.mancin 30 // (1) Istituto Superiore di Sanita' and INFN 31 // (2) Univ. La Sapienza and INFN Roma, Italy 32 33 #include "DetectorConstruction.hh" 34 #include "PrimaryGeneratorAction.hh" 35 #include "PrimaryGeneratorMessenger.hh" 36 37 #include <G4ParticleTable.hh> 38 #include <G4Event.hh> 39 #include <G4SystemOfUnits.hh> 40 #include <G4ParticleGun.hh> 41 #include <G4GeneralParticleSource.hh> 42 #include <Randomize.hh> 43 #include <G4RunManager.hh> 44 #include <G4PhysicalConstants.hh> 45 46 using namespace std; 47 48 PrimaryGeneratorAction::PrimaryGeneratorAction 49 : fGun(nullptr), 50 gunRadius(0), gunMeanEnergy(0), gunStdEnergy 51 energy(0), 52 particle(nullptr) 53 { 54 priGenMessenger = new PrimaryGeneratorMessen 55 G4int n_particle = 1; 56 fGun = new G4ParticleGun(n_particle); 57 } 58 59 PrimaryGeneratorAction::~PrimaryGeneratorActio 60 { 61 delete priGenMessenger; 62 delete fGun; 63 } 64 65 void PrimaryGeneratorAction::GeneratePrimaries 66 { 67 GenerateFromRandom(); 68 69 fGun -> SetParticlePosition(position); 70 fGun -> SetParticleMomentumDirection((G4Part 71 fGun -> SetParticleEnergy(energy * MeV); 72 fGun -> SetParticleDefinition(particle); 73 // create vertex with previous specification 74 fGun -> GeneratePrimaryVertex(anEvent); 75 } 76 77 void PrimaryGeneratorAction::GenerateFromRando 78 { 79 DetectorConstruction* detector = (DetectorCo 80 G4RunManager::GetRunManager() -> GetUserDe 81 82 G4double zPos = -(detector -> GetAccOriginPo 83 G4double alpha, rho, phi, sinTheta, cosTheta 84 85 sinTheta = G4RandGauss::shoot(0., 0.003); 86 cosTheta = sqrt(1-sinTheta*sinTheta); 87 phi = twopi * G4UniformRand(); 88 rho = gunRadius * G4UniformRand(); 89 alpha = twopi * G4UniformRand(); 90 91 particle = G4ParticleTable::GetParticleTable 92 direction = {sinTheta * cos(phi), sinTheta * 93 position = {rho * sin(alpha), rho * cos(alph 94 energy = G4RandGauss::shoot(gunMeanEnergy, g 95 } 96 97 void PrimaryGeneratorAction::SetGunRadius(G4do 98 { 99 gunRadius = value; 100 } 101 102 void PrimaryGeneratorAction::SetGunMeanEnergy( 103 { 104 gunMeanEnergy = value; 105 } 106 107 void PrimaryGeneratorAction::SetGunStdEnergy(G 108 { 109 gunStdEnergy = value; 110 } 111