GarfieldG4FastSimulationModel.cc

Go to the documentation of this file.

//
// ********************************************************************
// * 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.          *
// ********************************************************************
//
// $Id: GarfieldG4FastSimulationModel.cc 999994 2015-12-11 14:47:43Z dpfeiffe $
//
/// \file GarfieldG4FastSimulationModel.cc
/// \brief Implementation of the GarfieldG4FastSimulationModel class
 
#include <iostream>
#include "GarfieldG4FastSimulationModel.hh"
#include "G4VPhysicalVolume.hh"
#include "G4GDMLParser.hh"
#include "G4Electron.hh"
#include "G4Gamma.hh"
 
#include "G4SystemOfUnits.hh"
 
GarfieldG4FastSimulationModel::GarfieldG4FastSimulationModel(G4String modelName,
        G4Region* envelope) :
        G4VFastSimulationModel(modelName, envelope) {
    fGarfieldPhysics = GarfieldPhysics::GetInstance();
    fGarfieldPhysics->InitializePhysics();
 
}
 
GarfieldG4FastSimulationModel::GarfieldG4FastSimulationModel(G4String modelName) :
        G4VFastSimulationModel(modelName) {
    fGarfieldPhysics = GarfieldPhysics::GetInstance();
    fGarfieldPhysics->InitializePhysics();
}
 
GarfieldG4FastSimulationModel::~GarfieldG4FastSimulationModel() {
}
 
void GarfieldG4FastSimulationModel::WriteGeometryToGDML(
        G4VPhysicalVolume* physicalVolume) {
 
    G4GDMLParser* parser = new G4GDMLParser();
    remove("garfieldGeometry.gdml");
    parser->Write("garfieldGeometry.gdml", physicalVolume, false);
    delete parser;
}
 
G4bool GarfieldG4FastSimulationModel::IsApplicable(
        const G4ParticleDefinition& particleType) {
    G4String particleName = particleType.GetParticleName();
    if (fGarfieldPhysics->FindParticleName(particleName, "garfield")) {
        return true;
    }
    return false;
}
 
G4bool GarfieldG4FastSimulationModel::ModelTrigger(
        const G4FastTrack& fastTrack) {
    double ekin_MeV = fastTrack.GetPrimaryTrack()->GetKineticEnergy() / MeV;
    G4String particleName =
            fastTrack.GetPrimaryTrack()->GetParticleDefinition()->GetParticleName();
    if (fGarfieldPhysics->FindParticleNameEnergy(particleName, ekin_MeV,
            "garfield")) {
        return true;
    }
    return false;
}
 
void GarfieldG4FastSimulationModel::DoIt(const G4FastTrack& fastTrack,
        G4FastStep& fastStep) {
 
    G4TouchableHandle theTouchable =
            fastTrack.GetPrimaryTrack()->GetTouchableHandle();
    G4String name = theTouchable->GetVolume()->GetName();
 
    G4ThreeVector pdirection =
            fastTrack.GetPrimaryTrack()->GetMomentum().unit();
    G4ThreeVector localdir = fastTrack.GetPrimaryTrackLocalDirection();
 
    G4ThreeVector worldPosition = fastTrack.GetPrimaryTrack()->GetPosition();
    G4ThreeVector localPosition = fastTrack.GetPrimaryTrackLocalPosition();
 
    double ekin_MeV = fastTrack.GetPrimaryTrack()->GetKineticEnergy() / MeV;
    G4double globalTime = fastTrack.GetPrimaryTrack()->GetGlobalTime();
 
    G4String particleName =
            fastTrack.GetPrimaryTrack()->GetParticleDefinition()->GetParticleName();
 
    fastStep.KillPrimaryTrack();
    fastStep.SetPrimaryTrackPathLength(0.0);
 
    if (particleName == "kaon+") {
        particleName = "K+";
    } else if (particleName == "kaon-") {
        particleName = "K-";
    } else if (particleName == "anti_proton") {
        particleName = "anti-proton";
    }
 
    fGarfieldPhysics->DoIt(particleName, ekin_MeV, globalTime,
            localPosition.x() / CLHEP::cm, localPosition.y() / CLHEP::cm,
            localPosition.z() / CLHEP::cm, localdir.x(), localdir.y(),
            localdir.z());
 
    fastStep.SetTotalEnergyDeposited(fGarfieldPhysics->GetEnergyDeposit_MeV());
 
    if (fGarfieldPhysics->GetCreateSecondariesInGeant4()) {
        std::vector<GarfieldParticle*>* secondaryParticles =
                fGarfieldPhysics->GetSecondaryParticles();
 
        if (secondaryParticles->size() > 0) {
            fastStep.SetNumberOfSecondaryTracks(secondaryParticles->size());
 
            G4double totalEnergySecondaries_MeV = 0;
 
            for (std::vector<GarfieldParticle*>::iterator it =
                    secondaryParticles->begin();
                    it != secondaryParticles->end(); ++it) {
                G4double x = (*it)->getX_mm();
                G4double y = (*it)->getY_mm();
                G4double z = (*it)->getZ_mm();
                G4double eKin_MeV = (*it)->getEkin_MeV();
                G4double dx = (*it)->getDX();
                G4double dy = (*it)->getDY();
                G4double dz = (*it)->getDZ();
                G4double time = (*it)->getTime();
                G4ThreeVector momentumDirection(dx, dy, dz);
                G4ThreeVector position(x, y, z);
                if ((*it)->getParticleName() == "e-") {
                    G4DynamicParticle particle(G4Electron::ElectronDefinition(),
                            momentumDirection, eKin_MeV);
                    fastStep.CreateSecondaryTrack(particle, position, time,
                            true);
                    totalEnergySecondaries_MeV += eKin_MeV;
                } else if ((*it)->getParticleName() == "gamma") {
                    G4DynamicParticle particle(G4Gamma::GammaDefinition(),
                            momentumDirection, eKin_MeV);
                    fastStep.CreateSecondaryTrack(particle, position, time,
                            true);
                    totalEnergySecondaries_MeV += eKin_MeV;
                }
 
            }
        }
    }
}