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25 // 25 //
26 /// \file eventgenerator/particleGun/src/Prima 26 /// \file eventgenerator/particleGun/src/PrimaryGeneratorAction4.cc
27 /// \brief Implementation of the PrimaryGenera 27 /// \brief Implementation of the PrimaryGeneratorAction4 class
28 // 28 //
29 // 29 //
30 // << 30 //
31 //....oooOO0OOooo........oooOO0OOooo........oo 31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oo 32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33 33
34 #include "PrimaryGeneratorAction4.hh" 34 #include "PrimaryGeneratorAction4.hh"
35 <<
36 #include "PrimaryGeneratorAction.hh" 35 #include "PrimaryGeneratorAction.hh"
37 36
38 #include "G4Event.hh" 37 #include "G4Event.hh"
39 #include "G4ParticleDefinition.hh" <<
40 #include "G4ParticleGun.hh" 38 #include "G4ParticleGun.hh"
41 #include "G4ParticleTable.hh" 39 #include "G4ParticleTable.hh"
>> 40 #include "G4ParticleDefinition.hh"
42 #include "G4PhysicalConstants.hh" 41 #include "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
44 #include "Randomize.hh" 43 #include "Randomize.hh"
45 44
46 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 46
48 PrimaryGeneratorAction4::PrimaryGeneratorActio << 47 PrimaryGeneratorAction4::PrimaryGeneratorAction4(G4ParticleGun* gun)
>> 48 : fParticleGun(gun)
49 { 49 {
50 // vertex volume 50 // vertex volume
>> 51 //
>> 52 G4double Rmin = 2.*mm;
>> 53 G4double Rmax = 8.*mm;
>> 54 fRmin3 = Rmin*Rmin*Rmin;
>> 55 fRmax3 = Rmax*Rmax*Rmax;
>> 56
>> 57 //opening angle
51 // 58 //
52 G4double Rmin = 2. * mm; << 59 G4double alphaMin = 0.*deg;
53 G4double Rmax = 8. * mm; << 60 G4double alphaMax = 60.*deg;
54 fRmin3 = Rmin * Rmin * Rmin; <<
55 fRmax3 = Rmax * Rmax * Rmax; <<
56 <<
57 // opening angle <<
58 // <<
59 G4double alphaMin = 0. * deg; <<
60 G4double alphaMax = 60. * deg; <<
61 fCosAlphaMin = std::cos(alphaMin); 61 fCosAlphaMin = std::cos(alphaMin);
62 fCosAlphaMax = std::cos(alphaMax); << 62 fCosAlphaMax = std::cos(alphaMax);
63 } 63 }
64 64
65 //....oooOO0OOooo........oooOO0OOooo........oo 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66 66
67 void PrimaryGeneratorAction4::GeneratePrimarie << 67 PrimaryGeneratorAction4::~PrimaryGeneratorAction4()
68 { << 68 { }
69 // vertex position uniform in spherical shel <<
70 // <<
71 G4double cosTheta = 2 * G4UniformRand() - 1; <<
72 G4double sinTheta = std::sqrt(1. - cosTheta <<
73 G4double phi = twopi * G4UniformRand(); // <<
74 G4ThreeVector ur(sinTheta * std::cos(phi), s <<
75 <<
76 G4double R3 = fRmin3 + G4UniformRand() * (fR <<
77 G4double R = std::pow(R3, 1. / 3); <<
78 69
79 fParticleGun->SetParticlePosition(R * ur); << 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
80 71
81 // particle direction uniform around ur << 72 void PrimaryGeneratorAction4::GeneratePrimaries(G4Event* anEvent)
>> 73 {
>> 74 //vertex position uniform in spherical shell
82 // 75 //
83 // 1- in World frame << 76 G4double cosTheta = 2*G4UniformRand() - 1; //cosTheta uniform in [0, pi]
84 // cosAlpha uniform in [cos(alphaMin), cos(a << 77 G4double sinTheta = std::sqrt(1. - cosTheta*cosTheta);
85 G4double cosAlpha = fCosAlphaMin - G4Uniform << 78 G4double phi = twopi*G4UniformRand(); //phi uniform in [0, 2*pi]
86 G4double sinAlpha = std::sqrt(1. - cosAlpha << 79 G4ThreeVector ur(sinTheta*std::cos(phi),sinTheta*std::sin(phi),cosTheta);
87 G4double psi = twopi * G4UniformRand(); // << 80
88 G4ThreeVector dir(sinAlpha * std::cos(psi), << 81 G4double R3 = fRmin3 + G4UniformRand()*(fRmax3 - fRmin3);
89 << 82 G4double R = std::pow(R3, 1./3);
90 // 2- rotate dir (rotateUz transforms uz t << 83
91 dir.rotateUz(ur); << 84 fParticleGun->SetParticlePosition(R*ur);
>> 85
>> 86 //particle direction uniform around ur
>> 87 //
>> 88 //1- in World frame
>> 89 //cosAlpha uniform in [cos(alphaMin), cos(alphaMax)]
>> 90 G4double cosAlpha = fCosAlphaMin-G4UniformRand()*(fCosAlphaMin-fCosAlphaMax);
>> 91 G4double sinAlpha = std::sqrt(1. - cosAlpha*cosAlpha);
>> 92 G4double psi = twopi*G4UniformRand(); //psi uniform in (0,2*pi)
>> 93 G4ThreeVector dir(sinAlpha*std::cos(psi),sinAlpha*std::sin(psi),cosAlpha);
>> 94
>> 95 //2- rotate dir (rotateUz transforms uz to ur)
>> 96 dir.rotateUz(ur);
92 97
93 fParticleGun->SetParticleMomentumDirection(d 98 fParticleGun->SetParticleMomentumDirection(dir);
94 << 99
95 // energy << 100 //energy
96 // << 101 //
97 fParticleGun->SetParticleEnergy(1 * MeV); << 102 fParticleGun->SetParticleEnergy(1*MeV);
98 << 103
99 // create vertex << 104 //create vertex
100 // << 105 //
101 fParticleGun->GeneratePrimaryVertex(anEvent) 106 fParticleGun->GeneratePrimaryVertex(anEvent);
102 } 107 }
103 //....oooOO0OOooo........oooOO0OOooo........oo 108 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
104 109