| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 /// \file field/field01/src/F01PrimaryGeneratorAction.cc
27 /// \brief Implementation of the F01PrimaryGeneratorAction class
28 //
29 //
30 //
31 //
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
34
35 #include "F01PrimaryGeneratorAction.hh"
36
37 #include "F01DetectorConstruction.hh"
38 #include "F01PrimaryGeneratorMessenger.hh"
39
40 #include "G4Event.hh"
41 #include "G4ParticleDefinition.hh"
42 #include "G4ParticleGun.hh"
43 #include "G4ParticleTable.hh"
44 #include "G4PhysicalConstants.hh"
45 #include "G4SystemOfUnits.hh"
46 #include "Randomize.hh"
47
48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
49
50 G4ParticleDefinition* F01PrimaryGeneratorAction::fgPrimaryParticle = nullptr;
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 F01PrimaryGeneratorAction::F01PrimaryGeneratorAction(F01DetectorConstruction* det) : fDetector(det)
55 {
56 G4int n_particle = 1;
57 fParticleGun = new G4ParticleGun(n_particle);
58
59 // create a messenger for this class
60 fGunMessenger = new F01PrimaryGeneratorMessenger(this);
61
62 // default particle kinematic
63
64 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
65 G4String particleName;
66 G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "e-");
67 fParticleGun->SetParticleDefinition(particle);
68
69 fgPrimaryParticle = particle;
70
71 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., -1.));
72 fParticleGun->SetParticleEnergy(0.5 * GeV);
73
74 fZVertex = fDetector->GetAbsorberZpos() - 0.5 * (fDetector->GetAbsorberThickness());
75 fParticleGun->SetParticlePosition(G4ThreeVector(fXVertex, fYVertex, fZVertex));
76 }
77
78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
79
80 F01PrimaryGeneratorAction::~F01PrimaryGeneratorAction()
81 {
82 delete fParticleGun;
83 delete fGunMessenger;
84 }
85
86 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
87
88 void F01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
89 {
90 // this function is called at the begining of event
91 //
92 fgPrimaryParticle = fParticleGun->GetParticleDefinition();
93
94 G4double x0, y0, z0;
95 if (fVertexDefined) {
96 x0 = fXVertex;
97 y0 = fYVertex;
98 z0 = fZVertex;
99 }
100 else {
101 x0 = 0.;
102 y0 = 0.;
103 z0 = fDetector->GetAbsorberZpos() - 0.5 * (fDetector->GetAbsorberThickness());
104 }
105
106 G4double r0, phi0;
107 if (fRndmFlag == "on") {
108 r0 = (fDetector->GetAbsorberRadius()) * std::sqrt(G4UniformRand());
109 phi0 = twopi * G4UniformRand();
110 x0 = r0 * std::cos(phi0);
111 y0 = r0 * std::sin(phi0);
112 }
113
114 fParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
115 fParticleGun->GeneratePrimaryVertex(anEvent);
116 }
117
118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
119
120 G4String F01PrimaryGeneratorAction::GetPrimaryName()
121 {
122 return fgPrimaryParticle->GetParticleName();
123 }
124
125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
126
127 void F01PrimaryGeneratorAction::SetZVertex(G4double z)
128 {
129 fVertexDefined = true;
130 fZVertex = z;
131 G4cout << " Z coordinate of the primary vertex = " << fZVertex / mm << " mm." << G4endl;
132 }
133
134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
135
136 void F01PrimaryGeneratorAction::SetXVertex(G4double x)
137 {
138 fVertexDefined = true;
139 fXVertex = x;
140 G4cout << " X coordinate of the primary vertex = " << fXVertex / mm << " mm." << G4endl;
141 }
142
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
144
145 void F01PrimaryGeneratorAction::SetYVertex(G4double y)
146 {
147 fVertexDefined = true;
148 fYVertex = y;
149 G4cout << " Y coordinate of the primary vertex = " << fYVertex / mm << " mm." << G4endl;
150 }
151
152 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
153