gorad/src/GRPrimaryGeneratorAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0024 // ********************************************************************
0025 //
0026 //  Gorad (Geant4 Open-source Radiation Analysis and Design)
0027 //
0028 //  Author : Makoto Asai (SLAC National Accelerator Laboratory)
0029 //
0030 //  Development of Gorad is funded by NASA Johnson Space Center (JSC)
0031 //  under the contract NNJ15HK11B.
0032 //
0033 // ********************************************************************
0034 //
0035 // GRPrimaryGeneratorAction.cc
0036 //   Gorad primary generator action class
0037 //
0038 // History
0039 //   September 8th, 2020 : first implementation
0040 //
0041 // ********************************************************************
0042
0043 #include "GRPrimaryGeneratorAction.hh"
0044
0045 #include "G4Event.hh"
0046 #include "G4ParticleGun.hh"
0047 #include "G4GeneralParticleSource.hh"
0048 #include "G4ParticleTable.hh"
0049 #include "G4ParticleDefinition.hh"
0050 #include "G4SystemOfUnits.hh"
0051 #include "Randomize.hh"
0052
0053 GRPrimaryGeneratorAction::GRPrimaryGeneratorAction(
0054              G4bool useParticleGun, G4bool useParticleSource)
0055 : G4VUserPrimaryGeneratorAction(),
0056   fParticleGun(nullptr), fParticleSource(nullptr)
0057 {
0058   if(useParticleGun)
0059   {
0060     fParticleGun  = new G4ParticleGun(1);
0061
0062     auto particleTable = G4ParticleTable::GetParticleTable();
0063     auto fPion = particleTable->FindParticle("pi+");
0064     fParticleGun->SetParticleDefinition(fPion);
0065
0066     // default particle kinematics
0067     fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,0.));
0068     fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
0069     fParticleGun->SetParticleEnergy(1.*GeV);
0070   }
0071
0072   if(useParticleSource)
0073   { fParticleSource = new G4GeneralParticleSource(); }
0074 }
0075
0076 GRPrimaryGeneratorAction::~GRPrimaryGeneratorAction()
0077 {
0078   if(fParticleGun) delete fParticleGun;
0079   if(fParticleSource) delete fParticleSource;
0080 }
0081
0082 void GRPrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
0083 {
0084   if(fParticleGun) fParticleGun->GeneratePrimaryVertex(event);
0085   if(fParticleSource) fParticleSource->GeneratePrimaryVertex(event);
0086 }
0087