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1 //
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24 // ********************************************************************
25 //
26 // This example is provided by the Geant4-DNA collaboration
27 // Any report or published results obtained using the Geant4-DNA software
28 // shall cite the following Geant4-DNA collaboration publication:
29 // Med. Phys. 37 (2010) 4692-4708
30 // and papers
31 // M. Batmunkh et al. J Radiat Res Appl Sci 8 (2015) 498-507
32 // O. Belov et al. Physica Medica 32 (2016) 1510-1520
33 // The Geant4-DNA web site is available at http://geant4-dna.org
34 //
35 // -------------------------------------------------------------------
36 // November 2016
37 // -------------------------------------------------------------------
38 //
39 /// \file PrimaryGeneratorAction.cc
40 /// \brief Implementation of the PrimaryGeneratorAction class
41
42 #include "PrimaryGeneratorAction.hh"
43
44 #include "G4SystemOfUnits.hh"
45 //
46 #include "CommandLineParser.hh"
47
48 #include "G4Box.hh"
49 #include "G4Event.hh"
50 #include "G4LogicalVolume.hh"
51 #include "G4LogicalVolumeStore.hh"
52 #include "G4Orb.hh"
53 #include "G4ParticleDefinition.hh"
54 #include "G4ParticleGun.hh"
55 #include "G4PhysicalConstants.hh"
56 #include "G4PhysicalVolumeStore.hh"
57 #include "G4Proton.hh"
58 #include "G4VPhysicalVolume.hh"
59 #include "Randomize.hh"
60
61 using namespace G4DNAPARSER;
62
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64
65 PrimaryGeneratorAction::PrimaryGeneratorAction() : G4VUserPrimaryGeneratorAction()
66 {
67 G4int n_particle = 1;
68 fpParticleGun = new G4ParticleGun(n_particle);
69 //
70 G4ParticleDefinition* particle = G4Proton::Proton();
71 fpParticleGun->SetParticleDefinition(particle);
72 // default gun parameters
73 fpParticleGun->SetParticleEnergy(10. * MeV);
74 fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
75 fpParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
76 }
77
78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
79
80 PrimaryGeneratorAction::~PrimaryGeneratorAction()
81 {
82 delete fpParticleGun;
83 }
84
85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
86
87 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
88 {
89 // Initial kinetic energy of particles beam as Gaussion distribution!
90
91 // G4double Ekin = 10.*MeV;
92 // G4double deltaEkin = 9.0955e-5*MeV;
93 // fpParticleGun->SetParticleEnergy(G4RandGauss::shoot(Ekin,deltaEkin));
94
95 // In order to avoid dependence of PrimaryGeneratorAction
96 // on DetectorConstruction class we get world volume
97 // from G4LogicalVolumeStore
98
99 // We included three options for particles direction:
100
101 G4double mediumRadius = 0.;
102 G4double boundingXHalfLength = 0.;
103 G4double boundingYHalfLength = 0.;
104 G4double boundingZHalfLength = 0.;
105 G4LogicalVolume* mediumLV = G4LogicalVolumeStore::GetInstance()->GetVolume("Medium");
106 G4LogicalVolume* boundingLV = G4LogicalVolumeStore::GetInstance()->GetVolume("BoundingSlice");
107 G4Orb* mediumSphere = 0;
108 G4Box* boundingSlice = 0;
109 if (mediumLV && boundingLV) {
110 mediumSphere = dynamic_cast<G4Orb*>(mediumLV->GetSolid());
111 boundingSlice = dynamic_cast<G4Box*>(boundingLV->GetSolid());
112 }
113 if (mediumSphere && boundingSlice) {
114 mediumRadius = mediumSphere->GetRadius();
115 boundingXHalfLength = boundingSlice->GetXHalfLength();
116 boundingYHalfLength = boundingSlice->GetYHalfLength();
117 boundingZHalfLength = boundingSlice->GetZHalfLength();
118
119 /// a) Partilces directed to "square" on the XY plane of bounding slice
120 /// (or YZ, XZ)
121
122 if (CommandLineParser::GetParser()->GetCommandIfActive("-sXY")) {
123 // INITIAL BEAM DIVERGENCE
124 fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
125 // // INITIAL BEAM POSITION
126 fpParticleGun->SetParticlePosition(G4ThreeVector(
127 CLHEP::RandFlat::shoot(-boundingXHalfLength, boundingXHalfLength),
128 CLHEP::RandFlat::shoot(-boundingYHalfLength, boundingYHalfLength), -mediumRadius));
129 }
130
131 /// b) Partilces directed to "disk" on the XY plane of
132 /// bounding slice (or YZ, XZ)
133
134 else if (CommandLineParser::GetParser()->GetCommandIfActive("-dXY")) {
135 fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
136 G4double x0, y0, z0;
137 x0 = 100. * mm;
138 y0 = 100. * mm;
139 z0 = -mediumRadius; // mediumRadius;
140 while (!(std::sqrt(x0 * x0 + y0 * y0) <= mediumRadius)) {
141 x0 = CLHEP::RandFlat::shoot(-mediumRadius, mediumRadius);
142 y0 = CLHEP::RandFlat::shoot(-mediumRadius, mediumRadius);
143 }
144 fpParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
145 }
146
147 /// c) Partilces directed towards the bounding slice (default option!)
148 // Select a starting position on a sphere including the
149 // target volume and neuron morphology
150 else {
151 G4double cosTheta = 2. * G4UniformRand() - 1;
152 G4double sinTheta = std::sqrt(1. - cosTheta * cosTheta);
153 G4double phi = twopi * G4UniformRand();
154 G4ThreeVector positionStart(mediumRadius * sinTheta * std::cos(phi),
155 mediumRadius * sinTheta * std::sin(phi), mediumRadius * cosTheta);
156 fpParticleGun->SetParticlePosition(positionStart);
157 // To compute the direction, select a point inside the target volume
158 G4ThreeVector positionDir(boundingXHalfLength * (2. * G4UniformRand() - 1),
159 boundingYHalfLength * (2. * G4UniformRand() - 1),
160 boundingZHalfLength * (2. * G4UniformRand() - 1));
161 fpParticleGun->SetParticleMomentumDirection((positionDir - positionStart).unit());
162 // Surface area of sphere
163 fGunArea = 4. * pi * mediumRadius * mediumRadius;
164 }
165 }
166 else {
167 G4cerr << "Bounding slice volume not found!" << G4endl;
168 G4cerr << "Default particle kinematic used" << G4endl;
169 }
170
171 fpParticleGun->GeneratePrimaryVertex(anEvent);
172 }
173