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26 //
27 /// \file medical/GammaTherapy/src/PrimaryGene
28 /// \brief Implementation of the PrimaryGenera
29 //
30
31 //--------------------------------------------
32 //
33 // ClassName: PrimaryGeneratorAction
34 //
35 // Description: Generate primary beam
36 //
37 // Authors: V.Grichine, V.Ivanchenko
38 //
39 // Modified:
40 //
41 //--------------------------------------------
42 //
43
44 #include "PrimaryGeneratorAction.hh"
45
46 #include "DetectorConstruction.hh"
47 #include "PrimaryGeneratorMessenger.hh"
48
49 #include "G4ParticleDefinition.hh"
50 #include "G4ParticleGun.hh"
51 #include "G4ParticleTable.hh"
52 #include "G4PhysicalConstants.hh"
53 #include "G4SystemOfUnits.hh"
54 #include "Randomize.hh"
55
56 //....oooOO0OOooo........oooOO0OOooo........oo
57 //....oooOO0OOooo........oooOO0OOooo........oo
58
59 PrimaryGeneratorAction::PrimaryGeneratorAction
60 {
61 InitializeMe();
62 }
63
64 //....oooOO0OOooo........oooOO0OOooo........oo
65
66 void PrimaryGeneratorAction::InitializeMe()
67 {
68 fVerbose = fDetector->GetVerbose();
69 fMessenger = new PrimaryGeneratorMessenger(t
70 fParticleGun = new G4ParticleGun();
71 fCounter = 0;
72 fX0 = 0.0;
73 fY0 = 0.0;
74 fZ0 = 0.0;
75 fSigmaX = 1.5 * mm;
76 fSigmaY = 1.5 * mm;
77 fSigmaZ = 0.0;
78 fSigmaE = 0.0;
79 fRMax2 = 2.5 * 2.5 * mm * mm;
80 fSigmaTheta = 0.0;
81 // fSigmaTheta = 0.17*degree;
82 fMinCosTheta = 2.0;
83 SetBeamEnergy(50.0 * MeV);
84 fPosition = G4ThreeVector(fX0, fY0, fZ0);
85 fDirection = G4ThreeVector(0.0, 0.0, 1.0);
86 fGauss = true;
87 }
88
89 //....oooOO0OOooo........oooOO0OOooo........oo
90
91 PrimaryGeneratorAction::~PrimaryGeneratorActio
92 {
93 delete fParticleGun;
94 delete fMessenger;
95 }
96
97 //....oooOO0OOooo........oooOO0OOooo........oo
98
99 void PrimaryGeneratorAction::GeneratePrimaries
100 {
101 fCounter++;
102
103 // Simulation of beam position
104 G4double x = fX0;
105 G4double y = fY0;
106 G4double z = fDetector->GetGeneratorPosZ();
107 do {
108 if (0.0 < fSigmaX) {
109 x = G4RandGauss::shoot(fX0, fSigmaX);
110 }
111 if (0.0 < fSigmaY) {
112 y = G4RandGauss::shoot(fY0, fSigmaY);
113 }
114 } while (x * x + y * y > fRMax2);
115
116 fPosition = G4ThreeVector(x, y, z);
117 fParticleGun->SetParticlePosition(fPosition)
118
119 // Simulation of beam direction
120 G4double ux = fDirection.x();
121 G4double uy = fDirection.y();
122 G4double uz = fDirection.z();
123
124 // Beam particles are uniformly distributed
125 if (1.0 > fMinCosTheta) {
126 uz = fMinCosTheta + (1.0 - fMinCosTheta) *
127 ux = std::sqrt((1.0 - uz) * (1.0 + uz));
128 }
129 else if (fSigmaTheta > 0.0) {
130 ux = G4RandGauss::shoot(0.0, fSigmaTheta);
131 uz = std::sqrt((1.0 - ux) * (1.0 + ux));
132 }
133
134 G4double phi = twopi * G4UniformRand();
135 uy = ux;
136 ux *= std::cos(phi);
137 uy *= std::sin(phi);
138 fDirection = G4ThreeVector(ux, uy, uz);
139
140 fParticleGun->SetParticleMomentumDirection(f
141
142 // Simulation of beam kinetic energy
143 G4double kinEnergy = fEnergy;
144
145 if (fGauss == "flatE") {
146 kinEnergy = fEnergy - fSigmaE + 2. * fSigm
147 }
148 else if (0.0 < fSigmaE) {
149 kinEnergy = fEnergy + G4RandGauss::shoot(0
150 }
151 fParticleGun->SetParticleEnergy(kinEnergy);
152
153 if (fVerbose > 0) {
154 G4ParticleDefinition* particle = fParticle
155 G4String particleName = particle->GetParti
156 G4cout << "Event# " << fCounter << " Bea
157 << G4endl;
158 G4cout << "ParticleName= " << particleName
159 << std::setprecision(5) << " KinE
160 << " x(mm)= " << x / mm << " y(mm
161 << " ux= " << ux << " uy= " << uy
162 }
163
164 fParticleGun->GeneratePrimaryVertex(anEvent)
165 }
166
167 //....oooOO0OOooo........oooOO0OOooo........oo
168
169 void PrimaryGeneratorAction::SetBeamEnergy(G4d
170 {
171 fEnergy = val;
172 if (fEnergy < fDetector->GetMaxEnergy()) fDe
173 }
174
175 //....oooOO0OOooo........oooOO0OOooo........oo
176