Kamil Sedlak
1e050e6976
- a copyright information added to all relevant *.cc and *.hh files - the file "COPYING" added to the main directory of the musrSim
105 lines
4.5 KiB
C++
105 lines
4.5 KiB
C++
/***************************************************************************
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* musrSim - the program for the simulation of (mainly) muSR instruments. *
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* More info on http://lmu.web.psi.ch/simulation/index.html . *
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* musrSim is based od Geant4 (http://geant4.web.cern.ch/geant4/) *
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* *
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* Copyright (C) 2009 by Paul Scherrer Institut, 5232 Villigen PSI, *
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* Switzerland *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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***************************************************************************/
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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// Muonium "Scattering"
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// Id : musrMuScatter.cc, v 1.4
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// Author: Taofiq PARAISO, T. Shiroka
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// Date : 2007-12
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// Notes : Simplified model for Mu scattering. Spin effects have been excluded.
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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#include "musrMuScatter.hh"
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using namespace std;
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musrMuScatter::musrMuScatter(const G4String& name,
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G4ProcessType aType)
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: G4VDiscreteProcess(name, aType){}
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musrMuScatter:: ~musrMuScatter(){}
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// At the end of the step, the current volume is checked and if Muonium is in a solid
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// material (except for the carbon foil where it is generated), it is stopped immediately.
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G4VParticleChange* musrMuScatter::PostStepDoIt(const G4Track& trackData,
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const G4Step& aStep)
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{
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fParticleChange.Initialize(trackData);
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//! Tao - Get time information */
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itime = trackData.GetProperTime();
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gtime = trackData.GetGlobalTime();
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ftime = trackData.GetDynamicParticle()->GetPreAssignedDecayProperTime();
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deltatime = ftime - itime;
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fParticleChange.ProposeGlobalTime(deltatime + itime -gtime);
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/*! - Set position, momentum, energy and time of the particle change. */
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fParticleChange.ProposePosition(trackData.GetPosition());
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fParticleChange.ProposeMomentumDirection(trackData.GetMomentumDirection());
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fParticleChange.ProposeEnergy(trackData.GetKineticEnergy());
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fParticleChange.ProposeGlobalTime(gtime);
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fParticleChange.ProposeProperTime(itime);
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fParticleChange.ProposeTrackStatus(trackData.GetTrackStatus()) ;
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/*! - Verify the condition of applying the process: if Mu is in a material
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different than vacuum and carbon foil, then stop it directly. */
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if( CheckCondition(aStep))
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{
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fParticleChange.ProposePosition(trackData.GetStep()->GetPreStepPoint()->GetPosition());
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fParticleChange.ProposeTrackStatus(fStopButAlive) ;
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}
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/*! - Return the changed particle object. */
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return &fParticleChange;
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}
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/*! - Muonium will be stopped as soon as it enters a material different than vacuum or C foil. */
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G4bool musrMuScatter::CheckCondition(const G4Step& aStep)
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{
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G4bool condition = false;
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p_name = aStep.GetTrack()->GetDefinition()->GetParticleName(); // particle name
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if(p_name == "Mu" && aStep.GetTrack()->GetVolume()->GetLogicalVolume()->GetName()!="log_CFoil" &&
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aStep.GetTrack()->GetVolume()->GetLogicalVolume()->GetMaterial()->GetName()!="G4_Galactic")
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{
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condition=true;
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}
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return condition;
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}
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G4double musrMuScatter::GetMeanFreePath(const G4Track&,
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G4double,
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G4ForceCondition* condition)
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{
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*condition = Forced;
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return DBL_MAX;
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}
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void musrMuScatter::PrepareSecondary(const G4Track& track)
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{
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aSecondary = new G4Track(DP,track.GetDynamicParticle()->GetPreAssignedDecayProperTime(),track.GetPosition());
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}
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