PrimaryGeneratorAction Class Reference

Mandatory user class providing the primary particle generator. More...

#include <PrimaryGeneratorAction.hh>

List of all members.

Public Member Functions
	PrimaryGeneratorAction (DetectorConstruction *, RunAction *)
	Constructor. Sets the particle gun position, energy and direction.
void	SetParticle (G4int Z=6, G4int A=17, G4double E=0., G4double Q=0.)
	Obtains pointers to particle and ion tables, and retrieves the particle we want from them.
virtual	~PrimaryGeneratorAction ()
	Destructor, destroys the object.
void	GeneratePrimaries (G4Event *)
	Randoms the particle gun's position (if desired) and generates an event.
void	SetRndmFlag (G4String val)
	If rndmFlag is true, the gun's position is randomized at the beginning of each event.
G4ParticleGun *	GetParticleGun ()
	Returns the ParticleGun.
void	PrintTargetSize ()
	Print target size.
Private Attributes
G4ParticleGun *	particleGun
	Pointer a to the G4ParticleGun class.
DetectorConstruction *	Detector
	Pointer to DetectorConstruction.
RunAction *	myRunAction
PrimaryGeneratorMessenger *	gunMessenger
	Messenger for this class.
G4String	rndmFlag
	Flag for random gun position.

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Detailed Description

Mandatory user class providing the primary particle generator.

Definition at line 42 of file PrimaryGeneratorAction.hh.

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Constructor & Destructor Documentation

PrimaryGeneratorAction::PrimaryGeneratorAction	(	DetectorConstruction *	DC,
		RunAction *	run
	)

Constructor. Sets the particle gun position, energy and direction.

Parameters:

DC	Object containing the information the constructor needs.
run	Pointer to the RunAction, to inform this when we change the particle in the gun.

Definition at line 27 of file PrimaryGeneratorAction.cc.

References Detector, DetectorConstruction::GetWorldSizeX(), gunMessenger, and particleGun.

  :Detector(DC),myRunAction(run),rndmFlag("on")
{
  G4int n_particle = 1;
  particleGun  = new G4ParticleGun(n_particle);
  
  //create a messenger for this class
  gunMessenger = new PrimaryGeneratorMessenger(this);

  // default particle kinematic
  particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
  particleGun->SetParticleEnergy(11*GeV);                       // old value: 2.2 GeV

  //default particle gun position.
  G4double position = -(Detector->GetWorldSizeX());
  particleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
}

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Member Function Documentation

void PrimaryGeneratorAction::SetParticle	(	G4int	Z = 6,
		G4int	A = 17,
		G4double	E = 0.,
		G4double	Q = 0.
	)

Obtains pointers to particle and ion tables, and retrieves the particle we want from them.

Parameters:

Z	The atomic number of the particle.
A	The atomic mass of the particle.
E	The excitation energy of the particle.
Q	The charge of the particle.

Definition at line 11 of file PrimaryGeneratorAction.cc.

References particleGun.

Referenced by main().

{
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  particleTable->GetIonTable()->CreateAllIon();

  G4ParticleDefinition* particle = particleTable->GetIon(Z, A, E);
  if(particle!=NULL)
    {
      particleGun->SetParticleCharge(Q);                                        
      particleGun->SetParticleDefinition(particle);
      myRunAction->SetParticleZ(Z);
      myRunAction->SetParticleA(A);
    }
}

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

• PrimaryGeneratorAction.hh
• PrimaryGeneratorAction.cc