| 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