Gabriele Cosmo
115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
/// \file field/BlineTracer/src/G4BlinePrimaryGeneratorAction.cc
|
|
/// \brief Implementation of the G4BlinePrimaryGeneratorAction class
|
|
//
|
|
//
|
|
//
|
|
//
|
|
// --------------------------------------------------------------------
|
|
//
|
|
// G4BlinePrimaryGeneratorAction implementation
|
|
//
|
|
// --------------------------------------------------------------------
|
|
// Author: Laurent Desorgher (desorgher@phim.unibe.ch)
|
|
// Created - 2003-10-06
|
|
// --------------------------------------------------------------------
|
|
|
|
#include "G4BlinePrimaryGeneratorAction.hh"
|
|
|
|
#include "G4Types.hh"
|
|
#include "G4Event.hh"
|
|
#include "G4ChargedGeantino.hh"
|
|
#include "G4SystemOfUnits.hh"
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
G4BlinePrimaryGeneratorAction::G4BlinePrimaryGeneratorAction()
|
|
{
|
|
fUserPrimaryAction = 0;
|
|
fFirstPartOfBline = true;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
G4BlinePrimaryGeneratorAction::~G4BlinePrimaryGeneratorAction()
|
|
{
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
void G4BlinePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
|
|
{
|
|
if (!fUserPrimaryAction)
|
|
{
|
|
G4Exception("G4BlinePrimaryGeneratorAction::GeneratePrimaries()",
|
|
"NullPointer", JustWarning,
|
|
"Primary generator action not defined !");
|
|
return;
|
|
}
|
|
|
|
// For the first part of a bline the start position and time are defined
|
|
// by using the USER primary action while for the second part the previous
|
|
// values are taken.
|
|
|
|
if (fFirstPartOfBline)
|
|
{
|
|
// set the position and time defined by using the USER primary action
|
|
|
|
G4Event* tmpEvent = new G4Event();
|
|
fUserPrimaryAction->GeneratePrimaries(tmpEvent);
|
|
fBlineStartPosition = tmpEvent->GetPrimaryVertex()->GetPosition();
|
|
fT0 = tmpEvent->GetPrimaryVertex()->GetT0();
|
|
delete tmpEvent;
|
|
}
|
|
fFirstPartOfBline = false;
|
|
|
|
G4PrimaryVertex* primary_vertex =
|
|
new G4PrimaryVertex(fBlineStartPosition, fT0);
|
|
|
|
// Define the particle to be tracked as Charged Geantino
|
|
|
|
G4ChargedGeantino* pdef = G4ChargedGeantino::ChargedGeantino();
|
|
|
|
G4double mass = pdef->GetPDGMass();
|
|
G4double energy = 10000.*MeV + mass;
|
|
G4double pmom = std::sqrt(energy*energy-mass*mass);
|
|
|
|
// The momentum direction and energy do not have an effect in tracing of
|
|
// bline but still need to be defined.
|
|
|
|
G4double px = 0.;
|
|
G4double py = 0.;
|
|
G4double pz = pmom;
|
|
|
|
G4PrimaryParticle* particle = new G4PrimaryParticle(pdef,px,py,pz);
|
|
particle->SetMass( mass );
|
|
particle->SetCharge(pdef->GetPDGCharge());
|
|
primary_vertex->SetPrimary( particle );
|
|
|
|
anEvent->AddPrimaryVertex( primary_vertex );
|
|
}
|