PrimaryGeneratorAction3 Class Reference

#include <PrimaryGeneratorAction3.hh>

Public Member Functions
	PrimaryGeneratorAction3 (G4ParticleGun *)
	~PrimaryGeneratorAction3 ()
void	GeneratePrimaries (G4Event *)
G4ThreeVector	GetNewUz ()
G4double	GetAlphaMax ()

Detailed Description

Definition at line 47 of file PrimaryGeneratorAction3.hh.

Constructor & Destructor Documentation

PrimaryGeneratorAction3::PrimaryGeneratorAction3

(

G4ParticleGun *

gun

)

Definition at line 48 of file PrimaryGeneratorAction3.cc.

: fParticleGun(gun)
{    
  // direction
  //
  G4double theta = 90*deg, phi = 45*deg;
  fNewUz = G4ThreeVector(std::sin(theta)*std::cos(phi),
                         std::sin(theta)*std::sin(phi),
                         std::cos(theta));
                        
  fAlphaMax = 15*deg;                        
}

PrimaryGeneratorAction3::~PrimaryGeneratorAction3

(

)

Definition at line 63 of file PrimaryGeneratorAction3.cc.

{ }

Member Function Documentation

void PrimaryGeneratorAction3::GeneratePrimaries

(

G4Event *

anEvent

)

Definition at line 68 of file PrimaryGeneratorAction3.cc.

{
  //particle direction uniform around fNewUz axis
  //
  //1- in World frame      
  //cosAlpha uniform in [cos(0), cos(fAlphaMax)]
  G4double cosAlpha = 1. - G4UniformRand()*(1.- std::cos(fAlphaMax));
  G4double sinAlpha = std::sqrt(1. - cosAlpha*cosAlpha);
  G4double psi      = twopi*G4UniformRand();  //psi uniform in [0, 2*pi]  
  G4ThreeVector dir(sinAlpha*std::cos(psi),sinAlpha*std::sin(psi),cosAlpha);
  
  //2- rotate dir   (rotateUz transforms uz to fNewUz)
  dir.rotateUz(fNewUz);           

  fParticleGun->SetParticleMomentumDirection(dir);
  
  //set energy
  //
  fParticleGun->SetParticleEnergy(1*MeV);    

  //create vertex
  //   
  fParticleGun->GeneratePrimaryVertex(anEvent);
}

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G4double PrimaryGeneratorAction3::GetAlphaMax ( )

inline

Definition at line 58 of file PrimaryGeneratorAction3.hh.

{ return fAlphaMax; };

G4ThreeVector PrimaryGeneratorAction3::GetNewUz ( )

inline

Definition at line 57 of file PrimaryGeneratorAction3.hh.

{ return fNewUz; };

---

The documentation for this class was generated from the following files:

• source/geant4.10.03.p02/examples/extended/eventgenerator/particleGun/include/PrimaryGeneratorAction3.hh
• source/geant4.10.03.p02/examples/extended/eventgenerator/particleGun/src/PrimaryGeneratorAction3.cc