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25 // 25 //
26 // 26 //
27 /// \file B2/B2a/src/PrimaryGeneratorAction.cc 27 /// \file B2/B2a/src/PrimaryGeneratorAction.cc
28 /// \brief Implementation of the B2::PrimaryGe 28 /// \brief Implementation of the B2::PrimaryGeneratorAction class
29 29
30 #include "PrimaryGeneratorAction.hh" 30 #include "PrimaryGeneratorAction.hh"
31 31
32 #include "G4Box.hh" <<
33 #include "G4LogicalVolume.hh" <<
34 #include "G4LogicalVolumeStore.hh" 32 #include "G4LogicalVolumeStore.hh"
>> 33 #include "G4LogicalVolume.hh"
>> 34 #include "G4Box.hh"
>> 35 #include "G4Event.hh"
35 #include "G4ParticleGun.hh" 36 #include "G4ParticleGun.hh"
36 #include "G4ParticleTable.hh" 37 #include "G4ParticleTable.hh"
>> 38 #include "G4ParticleDefinition.hh"
37 #include "G4SystemOfUnits.hh" 39 #include "G4SystemOfUnits.hh"
>> 40 #include "Randomize.hh"
38 41
39 namespace B2 42 namespace B2
40 { 43 {
41 44
42 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 46
44 PrimaryGeneratorAction::PrimaryGeneratorAction 47 PrimaryGeneratorAction::PrimaryGeneratorAction()
45 { 48 {
46 G4int nofParticles = 1; 49 G4int nofParticles = 1;
47 fParticleGun = new G4ParticleGun(nofParticle 50 fParticleGun = new G4ParticleGun(nofParticles);
48 51
49 // default particle kinematic 52 // default particle kinematic
50 53
51 G4ParticleDefinition* particleDefinition = << 54 G4ParticleDefinition* particleDefinition
52 G4ParticleTable::GetParticleTable()->FindP << 55 = G4ParticleTable::GetParticleTable()->FindParticle("proton");
53 56
54 fParticleGun->SetParticleDefinition(particle 57 fParticleGun->SetParticleDefinition(particleDefinition);
55 fParticleGun->SetParticleMomentumDirection(G << 58 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
56 fParticleGun->SetParticleEnergy(3.0 * GeV); << 59 fParticleGun->SetParticleEnergy(3.0*GeV);
57 } 60 }
58 61
59 //....oooOO0OOooo........oooOO0OOooo........oo 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
60 63
61 PrimaryGeneratorAction::~PrimaryGeneratorActio 64 PrimaryGeneratorAction::~PrimaryGeneratorAction()
62 { 65 {
63 delete fParticleGun; 66 delete fParticleGun;
64 } 67 }
65 68
66 //....oooOO0OOooo........oooOO0OOooo........oo 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 70
68 void PrimaryGeneratorAction::GeneratePrimaries << 71 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
69 { 72 {
70 // This function is called at the begining o 73 // This function is called at the begining of event
71 74
72 // In order to avoid dependence of PrimaryGe 75 // In order to avoid dependence of PrimaryGeneratorAction
73 // on DetectorConstruction class we get worl 76 // on DetectorConstruction class we get world volume
74 // from G4LogicalVolumeStore. 77 // from G4LogicalVolumeStore.
75 78
76 G4double worldZHalfLength = 0; 79 G4double worldZHalfLength = 0;
77 G4LogicalVolume* worldLV = G4LogicalVolumeSt << 80 G4LogicalVolume* worldLV
>> 81 = G4LogicalVolumeStore::GetInstance()->GetVolume("World");
78 G4Box* worldBox = nullptr; 82 G4Box* worldBox = nullptr;
79 if (worldLV) worldBox = dynamic_cast<G4Box*> << 83 if ( worldLV ) worldBox = dynamic_cast<G4Box*>(worldLV->GetSolid());
80 if (worldBox) << 84 if ( worldBox ) worldZHalfLength = worldBox->GetZHalfLength();
81 worldZHalfLength = worldBox->GetZHalfLengt << 85 else {
82 else { <<
83 G4cerr << "World volume of box not found." 86 G4cerr << "World volume of box not found." << G4endl;
84 G4cerr << "Perhaps you have changed geomet 87 G4cerr << "Perhaps you have changed geometry." << G4endl;
85 G4cerr << "The gun will be place in the ce 88 G4cerr << "The gun will be place in the center." << G4endl;
86 } 89 }
87 90
88 // Starting a primary particle close to the << 91 // Note that this particular case of starting a primary particle on the world boundary
89 // << 92 // requires shooting in a direction towards inside the world.
90 fParticleGun->SetParticlePosition(G4ThreeVec << 93 fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., -worldZHalfLength));
91 94
92 fParticleGun->GeneratePrimaryVertex(event); << 95 fParticleGun->GeneratePrimaryVertex(anEvent);
93 } 96 }
94 97
95 //....oooOO0OOooo........oooOO0OOooo........oo 98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
96 99
97 } // namespace B2 << 100 }
>> 101
98 102