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 // (adapted from B1PrimaryGeneratorAction) 27 // Author: A.Knaian (ara@nklabs.com), N.MacFad 28 29 #include "FAPrimaryGeneratorAction.hh" 30 #include "G4LogicalVolumeStore.hh" 31 #include "G4LogicalVolume.hh" 32 #include "G4Box.hh" 33 #include "G4RunManager.hh" 34 #include "G4ParticleGun.hh" 35 #include "G4ParticleTable.hh" 36 #include "G4ParticleDefinition.hh" 37 #include "G4SystemOfUnits.hh" 38 #include "Randomize.hh" 39 40 PrimaryGeneratorAction::PrimaryGeneratorAction 41 : G4VUserPrimaryGeneratorAction(), fParticleGu 42 { 43 G4int n_particle = 1; 44 fParticleGun = new G4ParticleGun(n_particle) 45 46 // default particle kinematic 47 G4ParticleTable* particleTable = G4ParticleTa 48 G4String particleName; 49 G4ParticleDefinition* particle 50 = particleTable->FindParticle(particleName 51 fParticleGun->SetParticleDefinition(particle) 52 fParticleGun->SetParticleMomentumDirection(G4 53 fParticleGun->SetParticleEnergy(50.*MeV); 54 } 55 56 PrimaryGeneratorAction::~PrimaryGeneratorActio 57 { 58 delete fParticleGun; 59 } 60 61 void PrimaryGeneratorAction::GeneratePrimaries 62 { 63 G4double worldSizeXY = 0; 64 G4double worldSizeZ = 0; 65 66 if (!fWorldBox) 67 { 68 G4LogicalVolume* worldLV 69 = G4LogicalVolumeStore::GetInstance()->Get 70 if ( worldLV ) fWorldBox = dynamic_cast<G4Bo 71 } 72 if ( fWorldBox ) 73 { 74 worldSizeXY = fWorldBox->GetXHalfLength()* 75 worldSizeZ = fWorldBox->GetZHalfLength()*2 76 } 77 else 78 { 79 G4ExceptionDescription msg; 80 msg << "World volume of box shape not found 81 msg << "Perhaps you have changed geometry.\ 82 msg << "The gun will be place at the center 83 G4Exception("PrimaryGeneratorAction::Genera 84 "MyCode0002",JustWarning,msg); 85 } 86 87 // shoot on XY disk centered on Z-axis behi 88 G4double sigma = worldSizeXY/10.0; // s 89 G4double x0 = G4RandGauss::shoot(0,sigma); 90 G4double y0 = G4RandGauss::shoot(0,sigma); 91 G4double z0 = 0.95 * (-0.5) * worldSizeZ; 92 93 fParticleGun->SetParticlePosition(G4ThreeVe 94 fParticleGun->GeneratePrimaryVertex(anEvent 95 } 96 97