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25 //
26 /// \file OpNovice/src/OpNovicePrimaryGeneratorAction.cc
27 /// \brief Implementation of the OpNovicePrimaryGeneratorAction class
28 //
29 //
30 //
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "OpNovicePrimaryGeneratorAction.hh"
35
36 #include "OpNovicePrimaryGeneratorMessenger.hh"
37
38 #include "G4Event.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "G4ParticleGun.hh"
41 #include "G4ParticleTable.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "Randomize.hh"
44
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 OpNovicePrimaryGeneratorAction::OpNovicePrimaryGeneratorAction()
47 : G4VUserPrimaryGeneratorAction(), fParticleGun(nullptr)
48 {
49 G4int n_particle = 1;
50 fParticleGun = new G4ParticleGun(n_particle);
51 // create a messenger for this class
52 fGunMessenger = new OpNovicePrimaryGeneratorMessenger(this);
53 // default kinematic
54 //
55 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
56 G4ParticleDefinition* particle = particleTable->FindParticle("e+");
57
58 fParticleGun->SetParticleDefinition(particle);
59 fParticleGun->SetParticleTime(0.0 * ns);
60 fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
61 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
62 fParticleGun->SetParticleEnergy(500.0 * keV);
63 }
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66 OpNovicePrimaryGeneratorAction::~OpNovicePrimaryGeneratorAction()
67 {
68 delete fParticleGun;
69 delete fGunMessenger;
70 }
71
72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73 void OpNovicePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
74 {
75 fParticleGun->GeneratePrimaryVertex(anEvent);
76 }
77
78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
79 void OpNovicePrimaryGeneratorAction::SetOptPhotonPolar()
80 {
81 G4double angle = G4UniformRand() * 360.0 * deg;
82 SetOptPhotonPolar(angle);
83 }
84
85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
86 void OpNovicePrimaryGeneratorAction::SetOptPhotonPolar(G4double angle)
87 {
88 if (fParticleGun->GetParticleDefinition()->GetParticleName() != "opticalphoton") {
89 G4ExceptionDescription ed;
90 ed << "Warning: the particleGun is not an opticalphoton";
91 G4Exception("OpNovicePrimaryGeneratorAction::SetOptPhotonPolar()", "OpNovice_010", JustWarning,
92 ed);
93 return;
94 }
95
96 G4ThreeVector normal(1., 0., 0.);
97 G4ThreeVector kphoton = fParticleGun->GetParticleMomentumDirection();
98 G4ThreeVector product = normal.cross(kphoton);
99 G4double modul2 = product * product;
100
101 G4ThreeVector e_perpend(0., 0., 1.);
102 if (modul2 > 0.) e_perpend = (1. / std::sqrt(modul2)) * product;
103 G4ThreeVector e_paralle = e_perpend.cross(kphoton);
104
105 G4ThreeVector polar = std::cos(angle) * e_paralle + std::sin(angle) * e_perpend;
106 fParticleGun->SetParticlePolarization(polar);
107 }
108 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
109