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 | // $Id: PrimaryGeneratorAction.cc,v 1.4 2006/06/29 16:56:09 gunter Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
---|
28 | // |
---|
29 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
30 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
31 | |
---|
32 | #include "PrimaryGeneratorAction.hh" |
---|
33 | |
---|
34 | #include "DetectorConstruction.hh" |
---|
35 | #include "PrimaryGeneratorMessenger.hh" |
---|
36 | |
---|
37 | #include "G4Event.hh" |
---|
38 | #include "G4ParticleTable.hh" |
---|
39 | #include "G4ParticleDefinition.hh" |
---|
40 | #include "Randomize.hh" |
---|
41 | |
---|
42 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
43 | |
---|
44 | PrimaryGeneratorAction::PrimaryGeneratorAction( |
---|
45 | DetectorConstruction* DC) |
---|
46 | :Detector(DC) |
---|
47 | { |
---|
48 | G4int n_particle = 1; |
---|
49 | particleGun = new G4ParticleGun(n_particle); |
---|
50 | SetDefaultKinematic(); |
---|
51 | rndmBeam = 0.; |
---|
52 | |
---|
53 | //create a messenger for this class |
---|
54 | gunMessenger = new PrimaryGeneratorMessenger(this); |
---|
55 | } |
---|
56 | |
---|
57 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
58 | |
---|
59 | PrimaryGeneratorAction::~PrimaryGeneratorAction() |
---|
60 | { |
---|
61 | delete particleGun; |
---|
62 | delete gunMessenger; |
---|
63 | } |
---|
64 | |
---|
65 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
66 | |
---|
67 | void PrimaryGeneratorAction::SetDefaultKinematic() |
---|
68 | { |
---|
69 | // default particle kinematic |
---|
70 | // |
---|
71 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
---|
72 | G4ParticleDefinition* particle |
---|
73 | = particleTable->FindParticle("e-"); |
---|
74 | particleGun->SetParticleDefinition(particle); |
---|
75 | particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.)); |
---|
76 | particleGun->SetParticleEnergy(30.*MeV); |
---|
77 | G4double x0 = -0.5*(Detector->GetWorldSizeX()); |
---|
78 | particleGun->SetParticlePosition(G4ThreeVector(x0, 0*cm, 0*cm)); |
---|
79 | } |
---|
80 | |
---|
81 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
82 | |
---|
83 | void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
---|
84 | { |
---|
85 | //this function is called at the begining of event |
---|
86 | // |
---|
87 | //randomize the beam, if requested. |
---|
88 | if (rndmBeam > 0.) |
---|
89 | { |
---|
90 | G4ThreeVector oldPosition = particleGun->GetParticlePosition(); |
---|
91 | G4double rbeam = 0.5*(Detector->GetAbsorberSizeYZ())*rndmBeam; |
---|
92 | G4double x0 = oldPosition.x(); |
---|
93 | G4double y0 = oldPosition.y() + (2*G4UniformRand()-1.)*rbeam; |
---|
94 | G4double z0 = oldPosition.z() + (2*G4UniformRand()-1.)*rbeam; |
---|
95 | particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0)); |
---|
96 | particleGun->GeneratePrimaryVertex(anEvent); |
---|
97 | particleGun->SetParticlePosition(oldPosition); |
---|
98 | } |
---|
99 | else particleGun->GeneratePrimaryVertex(anEvent); |
---|
100 | } |
---|
101 | |
---|
102 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|