phonon/src/XPrimaryGeneratorAction.cc

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0025 //
0026 /// \file XPrimaryGeneratorAction.cc
0027 /// \brief Implementation of the XPrimaryGeneratorAction class
0028
0029 #include "XPrimaryGeneratorAction.hh"
0030
0031 #include "G4Event.hh"
0032 #include "G4ParticleGun.hh"
0033 #include "G4PhononLong.hh"
0034 #include "G4PhononTransFast.hh"
0035 #include "G4PhononTransSlow.hh"
0036 #include "G4RandomDirection.hh"
0037 #include "G4SystemOfUnits.hh"
0038
0039 using namespace std;
0040
0041 XPrimaryGeneratorAction::XPrimaryGeneratorAction()
0042 {
0043   G4int n_particle = 1;
0044   fParticleGun = new G4ParticleGun(n_particle);
0045
0046   // default particle kinematic
0047   fParticleGun->SetParticleDefinition(G4PhononLong::PhononDefinition());
0048   fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
0049   fParticleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, 0.0));
0050   fParticleGun->SetParticleEnergy(1e-4 * eV);
0051 }
0052
0053 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0054
0055 XPrimaryGeneratorAction::~XPrimaryGeneratorAction()
0056 {
0057   delete fParticleGun;
0058 }
0059
0060 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0061
0062 void XPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0063 {
0064   fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
0065
0066   G4double selector = G4UniformRand();
0067   if (selector < 0.53539) {
0068     fParticleGun->SetParticleDefinition(G4PhononTransSlow::PhononDefinition());
0069   }
0070   else if (selector < 0.90217) {
0071     fParticleGun->SetParticleDefinition(G4PhononTransFast::PhononDefinition());
0072   }
0073   else {
0074     fParticleGun->SetParticleDefinition(G4PhononLong::PhononDefinition());
0075   }
0076
0077   // Set phonon energy.
0078   // Do not set momentum direction here.
0079   // Any momentum direction set here will be overwritten
0080   // by XPhononStackingAction::ClassifyNewTrack
0081   fParticleGun->SetParticleEnergy(0.0075 * eV);
0082   fParticleGun->GeneratePrimaryVertex(anEvent);
0083 }
0084
0085 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....