| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // This example is provided by the Geant4-DNA 26 // This example is provided by the Geant4-DNA collaboration
27 // Any report or published results obtained us 27 // Any report or published results obtained using the Geant4-DNA software
28 // shall cite the following Geant4-DNA collabo 28 // shall cite the following Geant4-DNA collaboration publication:
29 // Med. Phys. 37 (2010) 4692-4708 29 // Med. Phys. 37 (2010) 4692-4708
30 // The Geant4-DNA web site is available at htt 30 // The Geant4-DNA web site is available at http://geant4-dna.org
31 // 31 //
32 // If you use this example, please cite the fo 32 // If you use this example, please cite the following publication:
33 // Rad. Prot. Dos. 133 (2009) 2-11 33 // Rad. Prot. Dos. 133 (2009) 2-11
34 // 34 //
35 #include "PrimaryGeneratorAction.hh" 35 #include "PrimaryGeneratorAction.hh"
36 #include "G4SystemOfUnits.hh" 36 #include "G4SystemOfUnits.hh"
37 #include "G4Event.hh" 37 #include "G4Event.hh"
38 #include "G4ParticleTable.hh" 38 #include "G4ParticleTable.hh"
39 #include "Randomize.hh" 39 #include "Randomize.hh"
40 40
41 PrimaryGeneratorAction::PrimaryGeneratorAction 41 PrimaryGeneratorAction::PrimaryGeneratorAction()
42 { 42 {
43 fParticleGun = new G4ParticleGun(1); 43 fParticleGun = new G4ParticleGun(1);
44 } 44 }
45 45
46 PrimaryGeneratorAction::~PrimaryGeneratorActio 46 PrimaryGeneratorAction::~PrimaryGeneratorAction()
47 { 47 {
48 delete fParticleGun; 48 delete fParticleGun;
49 } 49 }
50 50
51 void PrimaryGeneratorAction::GeneratePrimaries 51 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
52 { 52 {
53 G4int numEvent; 53 G4int numEvent;
54 numEvent=anEvent->GetEventID()+1; 54 numEvent=anEvent->GetEventID()+1;
55 G4double x0,y0,z0,theta,phi,xMom0,yMom0,zMom 55 G4double x0,y0,z0,theta,phi,xMom0,yMom0,zMom0,e0;
56 56
57 // INITIAL BEAM POSITION 57 // INITIAL BEAM POSITION
58 58
59 z0=-10000*mm; 59 z0=-10000*mm;
60 x0=10*mm; 60 x0=10*mm;
61 y0=10*mm; 61 y0=10*mm;
62 62
63 G4double sizeMax = 0.5*micrometer; // INITIA 63 G4double sizeMax = 0.5*micrometer; // INITIAL BEAM POSITION UNIFORMLY SPREAD ON A DISK
64 while (! (std::sqrt(x0*x0+y0*y0)<= sizeMax) 64 while (! (std::sqrt(x0*x0+y0*y0)<= sizeMax) )
65 { 65 {
66 x0 = CLHEP::RandFlat::shoot(-sizeMax,sizeM 66 x0 = CLHEP::RandFlat::shoot(-sizeMax,sizeMax);
67 y0 = CLHEP::RandFlat::shoot(-sizeMax,sizeM 67 y0 = CLHEP::RandFlat::shoot(-sizeMax,sizeMax);
68 } 68 }
69 69
70 // INITIAL BEAM ENERGY 70 // INITIAL BEAM ENERGY
71 71
72 e0= G4RandGauss::shoot(3*MeV,5.0955e-5*MeV); 72 e0= G4RandGauss::shoot(3*MeV,5.0955e-5*MeV); // AIFIRA ENERGY RESOLUTION
73 73
74 // INITIAL BEAM DIVERGENCE 74 // INITIAL BEAM DIVERGENCE
75 75
76 do { 76 do {
77 theta=std::acos(1-G4UniformRand()*(1.0- 77 theta=std::acos(1-G4UniformRand()*(1.0-std::cos(1.1e-6)))*rad;
78 } 78 }
79 while(theta>1.1e-6*rad); 79 while(theta>1.1e-6*rad);
80 80
81 phi=CLHEP::twopi*G4UniformRand()*rad; 81 phi=CLHEP::twopi*G4UniformRand()*rad;
82 82
83 xMom0=std::sin(theta)*std::cos(phi); 83 xMom0=std::sin(theta)*std::cos(phi);
84 yMom0=std::sin(theta)*std::sin(phi); 84 yMom0=std::sin(theta)*std::sin(phi);
85 zMom0=std::cos(theta); 85 zMom0=std::cos(theta);
86 86
87 // VERBOSE 87 // VERBOSE
88 88
89 G4cout 89 G4cout
90 << "-> Event # " << numEvent 90 << "-> Event # " << numEvent
91 << " generated " 91 << " generated "
92 << G4endl; 92 << G4endl;
93 93
94 /* 94 /*
95 G4cout 95 G4cout
96 << "-> Event # " << numEvent 96 << "-> Event # " << numEvent
97 << " : THETA from Z axis (mrad) = " << theta 97 << " : THETA from Z axis (mrad) = " << theta*1000
98 << " -- PHI (deg) = " << phi*180/CLHEP::pi 98 << " -- PHI (deg) = " << phi*180/CLHEP::pi
99 << " -- x0 (um) = " << x0/micrometer 99 << " -- x0 (um) = " << x0/micrometer
100 << " -- y0 (um) = " << y0/micrometer 100 << " -- y0 (um) = " << y0/micrometer
101 << " -- z0 (m) = " << z0/m 101 << " -- z0 (m) = " << z0/m
102 << " -- e0 (MeV) = " << e0/MeV 102 << " -- e0 (MeV) = " << e0/MeV
103 << G4endl; 103 << G4endl;
104 */ 104 */
105 105
106 fParticleGun->SetParticleEnergy(e0); 106 fParticleGun->SetParticleEnergy(e0);
107 107
108 fParticleGun->SetParticleMomentumDirection(G 108 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(xMom0,yMom0,zMom0));
109 109
110 fParticleGun->SetParticlePosition(G4ThreeVec 110 fParticleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
111 111
112 G4ParticleDefinition* particle= 112 G4ParticleDefinition* particle=
113 G4ParticleTable::GetParticleTable()->FindP 113 G4ParticleTable::GetParticleTable()->FindParticle("alpha");
114 114
115 fParticleGun->SetParticleDefinition(particle 115 fParticleGun->SetParticleDefinition(particle);
116 116
117 fParticleGun->GeneratePrimaryVertex(anEvent) 117 fParticleGun->GeneratePrimaryVertex(anEvent);
118 118
119 } 119 }
120 120