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1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
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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 // This example is provided by the Geant4-DNA
27 // Any report or published results obtained us
28 // shall cite the following Geant4-DNA collabo
29 // Med. Phys. 37 (2010) 4692-4708
30 // J. Comput. Phys. 274 (2014) 841-882
31 // The Geant4-DNA web site is available at htt
32 //
33 // Authors: J. Naoki D. Kondo (UCSF, US)
34 // J. Ramos-Mendez and B. Faddegon (U
35 //
36 /// \file PrimaryGeneratorAction.cc
37 /// \brief Implementation of the PrimaryGenera
38
39 #include "PrimaryGeneratorAction.hh"
40
41 #include "G4AffineTransform.hh"
42 #include "G4LogicalVolumeStore.hh"
43 #include "G4ParticleDefinition.hh"
44 #include "G4ParticleGun.hh"
45 #include "G4ParticleTable.hh"
46 #include "G4RandomDirection.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4VSolid.hh"
49 #include "G4VoxelLimits.hh"
50 #include "Randomize.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oo
53
54 PrimaryGeneratorAction::PrimaryGeneratorAction
55 {
56 G4int n_particle = 1;
57 fParticleGun = new G4ParticleGun(n_particle)
58
59 // default particle kinematic
60 G4ParticleTable* particleTable = G4ParticleT
61 G4ParticleDefinition* particle = particleTab
62 fParticleGun->SetParticleDefinition(particle
63 fParticleGun->SetParticlePosition(G4ThreeVec
64 fParticleGun->SetParticleEnergy(100 * keV);
65 fParticleGun->SetParticleMomentumDirection(G
66
67 fpSourceFileUI = new G4UIcmdWithAString("/fp
68 fpSourceFileUI->SetGuidance("Select the seco
69
70 fpVertexUI = new G4UIcmdWithAnInteger("/fpGu
71 fpVertexUI->SetGuidance("Number of primary p
72 }
73
74 //....oooOO0OOooo........oooOO0OOooo........oo
75
76 PrimaryGeneratorAction::~PrimaryGeneratorActio
77 {
78 delete fpVertexUI;
79 delete fParticleGun;
80 delete fpSourceFileUI;
81 }
82
83 //....oooOO0OOooo........oooOO0OOooo........oo
84
85 void PrimaryGeneratorAction::GeneratePrimaries
86 {
87 for (G4int i = 0; i < fVertex; i++) {
88 G4ThreeVector Position = SamplePosition();
89 G4double Energy = SampleSpectrum();
90 G4ThreeVector Direction = G4RandomDirectio
91
92 fParticleGun->SetParticleMomentumDirection
93 fParticleGun->SetParticlePosition(Position
94 fParticleGun->SetParticleEnergy(Energy);
95 fParticleGun->GeneratePrimaryVertex(anEven
96 }
97 }
98
99 //....oooOO0OOooo........oooOO0OOooo........oo
100
101 void PrimaryGeneratorAction::SetNewValue(G4UIc
102 {
103 if (command == fpSourceFileUI) {
104 fSourceFile = newValue;
105 LoadSpectrum();
106 }
107
108 if (command == fpVertexUI) {
109 fVertex = fpVertexUI->GetNewIntValue(newVa
110 }
111 }
112
113 //....oooOO0OOooo........oooOO0OOooo........oo
114
115 void PrimaryGeneratorAction::LoadSpectrum()
116 {
117 fEnergyWeights.clear();
118 fEnergies.clear();
119
120 std::ifstream SpectrumFile;
121 SpectrumFile.open(fSourceFile);
122 G4double x, y;
123
124 if (!SpectrumFile) {
125 std::cout << "Source File: " + fSourceFile
126 exit(1);
127 }
128
129 else {
130 while (SpectrumFile >> x >> y) {
131 fEnergies.push_back(x);
132 fEnergyWeights.push_back(y);
133 }
134 }
135 }
136
137 //....oooOO0OOooo........oooOO0OOooo........oo
138
139 G4double PrimaryGeneratorAction::SampleSpectru
140 {
141 G4double Energy = 1 * eV;
142 G4int Bins = fEnergyWeights.size();
143
144 while (true) {
145 G4double X = ((fEnergies[Bins - 1] - fEner
146 G4double Y = SampleProbability(X);
147 if (G4UniformRand() < Y) {
148 Energy = X * MeV;
149 break;
150 }
151 }
152
153 if (Energy > 1 * MeV) Energy = 0.9999999 * M
154
155 return Energy;
156 }
157
158 //....oooOO0OOooo........oooOO0OOooo........oo
159
160 G4double PrimaryGeneratorAction::SampleProbabi
161 {
162 G4double Y = 0;
163
164 for (std::size_t i = 0; i < fEnergies.size()
165 if (fEnergies[i] < X && X < fEnergies[i +
166 G4double M = (fEnergyWeights[i + 1] - fE
167 G4double B = fEnergyWeights[i] - (M * fE
168 Y = M * X + B;
169 }
170 }
171
172 return Y;
173 }
174
175 //....oooOO0OOooo........oooOO0OOooo........oo
176
177 G4ThreeVector PrimaryGeneratorAction::SamplePo
178 {
179 G4VSolid* solid = G4LogicalVolumeStore::GetI
180 G4VoxelLimits voxelLimits;
181 G4AffineTransform dontUse;
182 G4double testX, testY, testZ;
183 G4double xmin, xmax, ymin, ymax, zmin, zmax;
184 solid->CalculateExtent(kXAxis, voxelLimits,
185 solid->CalculateExtent(kYAxis, voxelLimits,
186 solid->CalculateExtent(kZAxis, voxelLimits,
187
188 while (true) {
189 testX = G4RandFlat::shoot(xmin, xmax);
190 testY = G4RandFlat::shoot(ymin, ymax);
191 testZ = G4RandFlat::shoot(zmin, zmax);
192 if (solid->Inside(G4ThreeVector(testX, tes
193 break;
194 }
195 }
196
197 return G4ThreeVector(testX, testY, testZ);
198 }
199
200 //....oooOO0OOooo........oooOO0OOooo........oo