Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 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 // The Geant4-DNA web site is available at htt 31 // 32 // If you use this example, please cite the fo 33 // Rad. Prot. Dos. 133 (2009) 2-11 34 // 35 #include "PrimaryGeneratorAction.hh" 36 #include "G4SystemOfUnits.hh" 37 #include "G4Event.hh" 38 #include "G4ParticleTable.hh" 39 #include "Randomize.hh" 40 41 PrimaryGeneratorAction::PrimaryGeneratorAction 42 { 43 fParticleGun = new G4ParticleGun(1); 44 } 45 46 PrimaryGeneratorAction::~PrimaryGeneratorActio 47 { 48 delete fParticleGun; 49 } 50 51 void PrimaryGeneratorAction::GeneratePrimaries 52 { 53 G4int numEvent; 54 numEvent=anEvent->GetEventID()+1; 55 G4double x0,y0,z0,theta,phi,xMom0,yMom0,zMom 56 57 // INITIAL BEAM POSITION 58 59 z0=-10000*mm; 60 x0=10*mm; 61 y0=10*mm; 62 63 G4double sizeMax = 0.5*micrometer; // INITIA 64 while (! (std::sqrt(x0*x0+y0*y0)<= sizeMax) 65 { 66 x0 = CLHEP::RandFlat::shoot(-sizeMax,sizeM 67 y0 = CLHEP::RandFlat::shoot(-sizeMax,sizeM 68 } 69 70 // INITIAL BEAM ENERGY 71 72 e0= G4RandGauss::shoot(3*MeV,5.0955e-5*MeV); 73 74 // INITIAL BEAM DIVERGENCE 75 76 do { 77 theta=std::acos(1-G4UniformRand()*(1.0- 78 } 79 while(theta>1.1e-6*rad); 80 81 phi=CLHEP::twopi*G4UniformRand()*rad; 82 83 xMom0=std::sin(theta)*std::cos(phi); 84 yMom0=std::sin(theta)*std::sin(phi); 85 zMom0=std::cos(theta); 86 87 // VERBOSE 88 89 G4cout 90 << "-> Event # " << numEvent 91 << " generated " 92 << G4endl; 93 94 /* 95 G4cout 96 << "-> Event # " << numEvent 97 << " : THETA from Z axis (mrad) = " << theta 98 << " -- PHI (deg) = " << phi*180/CLHEP::pi 99 << " -- x0 (um) = " << x0/micrometer 100 << " -- y0 (um) = " << y0/micrometer 101 << " -- z0 (m) = " << z0/m 102 << " -- e0 (MeV) = " << e0/MeV 103 << G4endl; 104 */ 105 106 fParticleGun->SetParticleEnergy(e0); 107 108 fParticleGun->SetParticleMomentumDirection(G 109 110 fParticleGun->SetParticlePosition(G4ThreeVec 111 112 G4ParticleDefinition* particle= 113 G4ParticleTable::GetParticleTable()->FindP 114 115 fParticleGun->SetParticleDefinition(particle 116 117 fParticleGun->GeneratePrimaryVertex(anEvent) 118 119 } 120