Gabriele Cosmo
499 lines
16 KiB
C++
499 lines
16 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4ParticleChange.cc,v 1.11 2000/10/20 11:42:38 kurasige Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// For information related to this code contact:
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// CERN, CN Division, ASD Group
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//
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//
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// ------------------------------------------------------------
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// Implemented for the new scheme 23 Mar. 1998 H.Kurahige
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// Change default debug flag to false 10 May. 1998 H.Kurahige
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// Add Track weight 12 Nov. 1998 H.Kurashige
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// Activate CheckIt method for VERBOSE mode 14 Dec. 1998 H.Kurashige
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// Modified CheckIt method for time 9 Feb. 1999 H.Kurashige
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// --------------------------------------------------------------
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#include "G4ParticleChange.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4TrackFastVector.hh"
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#include "G4DynamicParticle.hh"
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G4bool G4ParticleChange::fUseEBForAll = false;
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G4ParticleChange::G4ParticleChange():G4VParticleChange(false)
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{
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}
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G4ParticleChange::G4ParticleChange(G4bool useEB):G4VParticleChange(useEB)
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{
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#ifdef G4VERBOSE
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if (verboseLevel>2) {
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G4cout << "G4ParticleChange::G4ParticleChange() " << G4endl;
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}
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#endif
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}
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G4ParticleChange::~G4ParticleChange()
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{
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#ifdef G4VERBOSE
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if (verboseLevel>2) {
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G4cout << "G4ParticleChange::~G4ParticleChange() " << G4endl;
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}
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#endif
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}
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// copy constructor
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G4ParticleChange::G4ParticleChange(const G4ParticleChange &right): G4VParticleChange(right)
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{
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if (verboseLevel>1) {
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G4cout << "G4ParticleChange:: copy constructor is called " << G4endl;
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}
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theMomentumDirectionChange = right.theMomentumDirectionChange;
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thePolarizationChange = right.thePolarizationChange;
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thePositionChange = right.thePositionChange;
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theTimeChange = right.theTimeChange;
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theEnergyChange = right.theEnergyChange;
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theMassChange = right.theMassChange;
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theChargeChange = right.theChargeChange;
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theWeightChange = right.theWeightChange;
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theProperTimeChange = right.theProperTimeChange;
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}
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// assignemnt operator
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G4ParticleChange & G4ParticleChange::operator=(const G4ParticleChange &right)
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{
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if (verboseLevel>1) {
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G4cout << "G4ParticleChange:: assignment operator is called " << G4endl;
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}
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if (this != &right)
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{
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theListOfSecondaries = right.theListOfSecondaries;
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theSizeOftheListOfSecondaries = right.theSizeOftheListOfSecondaries;
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theNumberOfSecondaries = right.theNumberOfSecondaries;
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theStatusChange = right.theStatusChange;
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theMomentumDirectionChange = right.theMomentumDirectionChange;
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thePolarizationChange = right.thePolarizationChange;
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thePositionChange = right.thePositionChange;
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theTimeChange = right.theTimeChange;
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theEnergyChange = right.theEnergyChange;
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theMassChange = right.theMassChange;
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theChargeChange = right.theChargeChange;
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theWeightChange = right.theWeightChange;
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theTrueStepLength = right.theTrueStepLength;
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theLocalEnergyDeposit = right.theLocalEnergyDeposit;
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theSteppingControlFlag = right.theSteppingControlFlag;
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}
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return *this;
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}
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G4bool G4ParticleChange::operator==(const G4ParticleChange &right) const
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{
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return ((G4VParticleChange *)this == (G4VParticleChange *) &right);
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}
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G4bool G4ParticleChange::operator!=(const G4ParticleChange &right) const
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{
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return ((G4VParticleChange *)this != (G4VParticleChange *) &right);
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}
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//----------------------------------------------------------------
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// methods for handling secondaries
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//
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void G4ParticleChange::AddSecondary(G4DynamicParticle* aParticle,
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G4bool IsGoodForTracking )
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{
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// create track
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G4Track* aTrack = new G4Track(aParticle, theTimeChange, thePositionChange);
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// set IsGoodGorTrackingFlag
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if (IsGoodForTracking) aTrack->SetGoodForTrackingFlag();
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// Touchable is a temporary object, so you cannot keep the pointer
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aTrack->SetTouchable(0);
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// add a secondary
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G4VParticleChange::AddSecondary(aTrack);
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}
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void G4ParticleChange::AddSecondary(G4DynamicParticle* aParticle,
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G4ThreeVector newPosition,
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G4bool IsGoodForTracking )
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{
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// create track
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G4Track* aTrack = new G4Track(aParticle, theTimeChange, newPosition);
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// set IsGoodGorTrackingFlag
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if (IsGoodForTracking) aTrack->SetGoodForTrackingFlag();
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// Touchable is a temporary object, so you cannot keep the pointer
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aTrack->SetTouchable(0);
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// add a secondary
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G4VParticleChange::AddSecondary(aTrack);
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}
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void G4ParticleChange::AddSecondary(G4DynamicParticle* aParticle,
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G4double newTime,
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G4bool IsGoodForTracking )
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{
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// create track
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G4Track* aTrack = new G4Track(aParticle, newTime, thePositionChange);
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// set IsGoodGorTrackingFlag
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if (IsGoodForTracking) aTrack->SetGoodForTrackingFlag();
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// Touchable is a temporary object, so you cannot keep the pointer
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aTrack->SetTouchable(0);
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// add a secondary
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G4VParticleChange::AddSecondary(aTrack);
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}
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void G4ParticleChange::AddSecondary(G4Track* aTrack)
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{
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// add a secondary
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G4VParticleChange::AddSecondary(aTrack);
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}
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//----------------------------------------------------------------
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// functions for Initialization
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//
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void G4ParticleChange::Initialize(const G4Track& track)
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{
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// use base class's method at first
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G4VParticleChange::Initialize(track);
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// set Energy/Momentum etc. equal to those of the parent particle
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const G4DynamicParticle* pParticle = track.GetDynamicParticle();
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theEnergyChange = pParticle->GetKineticEnergy();
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theMomentumDirectionChange = pParticle->GetMomentumDirection();
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thePolarizationChange = pParticle->GetPolarization();
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theProperTimeChange = pParticle->GetProperTime();
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// Set mass/charge of DynamicParticle
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theMassChange = pParticle->GetMass();
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theChargeChange = pParticle->GetCharge();
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// set Position/Time etc. equal to those of the parent track
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thePositionChange = track.GetPosition();
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theTimeChange = track.GetGlobalTime();
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theWeightChange = track.GetWeight();
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}
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//----------------------------------------------------------------
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// methods for updating G4Step
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//
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G4Step* G4ParticleChange::UpdateStepForAlongStep(G4Step* pStep)
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{
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// A physics process always calculates the final state of the
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// particle relative to the initial state at the beginning
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// of the Step, i.e., based on information of G4Track (or
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// equivalently the PreStepPoint).
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// So, the differences (delta) between these two states have to be
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// calculated and be accumulated in PostStepPoint.
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// Take note that the return type of GetMomentumDirectionChange is a
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// pointer to G4ParticleMometum. Also it is a normalized
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// momentum vector.
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G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint();
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G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
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G4Track* aTrack = pStep->GetTrack();
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G4double mass = theMassChange;
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// Set Mass/Charge
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pPostStepPoint->SetMass(theMassChange);
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pPostStepPoint->SetCharge(theChargeChange);
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// calculate new kinetic energy
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G4double energy = pPostStepPoint->GetKineticEnergy()
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+ (theEnergyChange - pPreStepPoint->GetKineticEnergy());
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// update kinetic energy and momentum direction
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if (energy > 0.0) {
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// calculate new momentum
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G4ThreeVector pMomentum = pPostStepPoint->GetMomentum()
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+ ( CalcMomentum(theEnergyChange, theMomentumDirectionChange, mass)
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- pPreStepPoint->GetMomentum());
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G4double tMomentum = pMomentum.mag();
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G4ThreeVector direction( pMomentum.x()/tMomentum,
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pMomentum.y()/tMomentum,
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pMomentum.z()/tMomentum );
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pPostStepPoint->SetMomentumDirection(direction);
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pPostStepPoint->SetKineticEnergy( energy );
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} else {
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// stop case
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pPostStepPoint->SetMomentumDirection(G4ThreeVector(1., 0., 0.));
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pPostStepPoint->SetKineticEnergy(0.0);
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}
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// update polarization
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pPostStepPoint->AddPolarization( thePolarizationChange
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- pPreStepPoint->GetPolarization());
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// update position and time
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pPostStepPoint->AddPosition( thePositionChange
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- pPreStepPoint->GetPosition() );
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pPostStepPoint->AddGlobalTime( theTimeChange
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- pPreStepPoint->GetGlobalTime());
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pPostStepPoint->AddLocalTime( theTimeChange
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- pPreStepPoint->GetGlobalTime());
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pPostStepPoint->AddProperTime( theProperTimeChange
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- pPreStepPoint->GetProperTime());
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// update weight if use EB
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pPostStepPoint->SetWeight( theWeightChange );
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#ifdef G4VERBOSE
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if (debugFlag) CheckIt(*aTrack);
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#endif
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// Update the G4Step specific attributes
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return UpdateStepInfo(pStep);
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}
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G4Step* G4ParticleChange::UpdateStepForPostStep(G4Step* pStep)
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{
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// A physics process always calculates the final state of the particle
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// Take note that the return type of GetMomentumChange is a
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// pointer to G4ParticleMometum. Also it is a normalized
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// momentum vector.
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G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint();
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G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
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G4Track* aTrack = pStep->GetTrack();
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G4double mass = theMassChange;
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// Set Mass/Charge
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pPostStepPoint->SetMass(theMassChange);
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pPostStepPoint->SetCharge(theChargeChange);
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// update kinetic energy and momentum direction
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pPostStepPoint->SetMomentumDirection(theMomentumDirectionChange);
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pPostStepPoint->SetKineticEnergy( theEnergyChange );
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// update polarization
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pPostStepPoint->SetPolarization( thePolarizationChange );
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// update position and time
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pPostStepPoint->SetPosition( thePositionChange );
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pPostStepPoint->SetGlobalTime( theTimeChange );
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pPostStepPoint->AddLocalTime( theTimeChange
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- aTrack->GetGlobalTime());
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pPostStepPoint->SetProperTime( theProperTimeChange );
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// update weight if use EB
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pPostStepPoint->SetWeight( theWeightChange );
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#ifdef G4VERBOSE
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if (debugFlag) CheckIt(*aTrack);
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#endif
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// Update the G4Step specific attributes
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return UpdateStepInfo(pStep);
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}
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G4Step* G4ParticleChange::UpdateStepForAtRest(G4Step* pStep)
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{
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// A physics process always calculates the final state of the particle
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G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint();
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G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
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G4Track* aTrack = pStep->GetTrack();
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G4double mass = theMassChange;
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// Set Mass/Charge
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pPostStepPoint->SetMass(theMassChange);
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pPostStepPoint->SetCharge(theChargeChange);
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// update kinetic energy and momentum direction
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pPostStepPoint->SetMomentumDirection(theMomentumDirectionChange);
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pPostStepPoint->SetKineticEnergy( theEnergyChange );
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// update polarization
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pPostStepPoint->SetPolarization( thePolarizationChange );
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// update position and time
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pPostStepPoint->SetPosition( thePositionChange );
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pPostStepPoint->SetGlobalTime( theTimeChange );
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pPostStepPoint->AddLocalTime( theTimeChange
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- aTrack->GetGlobalTime());
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pPostStepPoint->SetProperTime( theProperTimeChange );
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// update weight if use EB
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pPostStepPoint->SetWeight( theWeightChange );
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#ifdef G4VERBOSE
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if (debugFlag) CheckIt(*aTrack);
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#endif
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// Update the G4Step specific attributes
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return UpdateStepInfo(pStep);
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}
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//----------------------------------------------------------------
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// methods for printing messages
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//
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void G4ParticleChange::DumpInfo() const
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{
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// use base-class DumpInfo
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G4VParticleChange::DumpInfo();
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G4cout.precision(3);
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G4cout << " Mass (GeV) : "
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<< G4std::setw(20) << theMassChange/GeV
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<< G4endl;
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G4cout << " Charge (eplus) : "
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<< G4std::setw(20) << theChargeChange/eplus
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<< G4endl;
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G4cout << " Position - x (mm) : "
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<< G4std::setw(20) << thePositionChange.x()/mm
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<< G4endl;
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G4cout << " Position - y (mm) : "
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<< G4std::setw(20) << thePositionChange.y()/mm
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<< G4endl;
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G4cout << " Position - z (mm) : "
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<< G4std::setw(20) << thePositionChange.z()/mm
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<< G4endl;
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G4cout << " Time (ns) : "
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<< G4std::setw(20) << theTimeChange/ns
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<< G4endl;
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G4cout << " Proper Time (ns) : "
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<< G4std::setw(20) << theProperTimeChange/ns
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<< G4endl;
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G4cout << " Momentum Direct - x : "
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<< G4std::setw(20) << theMomentumDirectionChange.x()
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<< G4endl;
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G4cout << " Momentum Direct - y : "
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<< G4std::setw(20) << theMomentumDirectionChange.y()
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<< G4endl;
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G4cout << " Momentum Direct - z : "
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<< G4std::setw(20) << theMomentumDirectionChange.z()
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<< G4endl;
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G4cout << " Kinetic Energy (MeV): "
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<< G4std::setw(20) << theEnergyChange/MeV
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<< G4endl;
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G4cout << " Polarization - x : "
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<< G4std::setw(20) << thePolarizationChange.x()
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<< G4endl;
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G4cout << " Polarization - y : "
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<< G4std::setw(20) << thePolarizationChange.y()
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<< G4endl;
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G4cout << " Polarization - z : "
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<< G4std::setw(20) << thePolarizationChange.z()
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<< G4endl;
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G4cout << " Track Weight : "
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<< G4std::setw(20) << theWeightChange
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<< G4endl;
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}
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G4bool G4ParticleChange::CheckIt(const G4Track& aTrack)
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{
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G4bool exitWithError = false;
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G4double accuracy;
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// No check in case of "fStopAndKill"
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if (GetStatusChange() == fStopAndKill ) {
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return G4VParticleChange::CheckIt(aTrack);
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}
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// MomentumDirection should be unit vector
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G4bool itsOKforMomentum = true;
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if ( theEnergyChange >0.) {
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accuracy = abs(theMomentumDirectionChange.mag2()-1.0);
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if (accuracy > accuracyForWarning) {
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G4cout << " G4ParticleChange::CheckIt : ";
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G4cout << "the Momentum Change is not unit vector !!" << G4endl;
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G4cout << " Difference: " << accuracy << G4endl;
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itsOKforMomentum = false;
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if (accuracy > accuracyForException) exitWithError = true;
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}
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}
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// Both global and proper time should not go back
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G4bool itsOKforGlobalTime = true;
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accuracy = (aTrack.GetGlobalTime()- theTimeChange)/ns;
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if (accuracy > accuracyForWarning) {
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G4cout << " G4ParticleChange::CheckIt : ";
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G4cout << "the global time goes back !!" << G4endl;
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G4cout << " Difference: " << accuracy << "[ns] " <<G4endl;
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itsOKforGlobalTime = false;
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if (accuracy > accuracyForException) exitWithError = true;
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}
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G4bool itsOKforProperTime = true;
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accuracy = (aTrack.GetProperTime() - theProperTimeChange )/ns;
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if (accuracy > accuracyForWarning) {
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G4cout << " G4ParticleChange::CheckIt : ";
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G4cout << "the proper time goes back !!" << G4endl;
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G4cout << " Difference: " << accuracy << "[ns] " <<G4endl;
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itsOKforProperTime = false;
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if (accuracy > accuracyForException) exitWithError = true;
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}
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// Kinetic Energy should not be negative
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G4bool itsOKforEnergy = true;
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accuracy = -1.0*theEnergyChange/MeV;
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if (accuracy > accuracyForWarning) {
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G4cout << " G4ParticleChange::CheckIt : ";
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G4cout << "the kinetic energy is negative !!" << G4endl;
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G4cout << " Difference: " << accuracy << "[MeV] " <<G4endl;
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itsOKforEnergy = false;
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if (accuracy > accuracyForException) exitWithError = true;
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}
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G4bool itsOK = itsOKforMomentum && itsOKforEnergy && itsOKforProperTime && itsOKforGlobalTime;
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// dump out information of this particle change
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if (!itsOK) {
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G4cout << " G4ParticleChange::CheckIt " <<G4endl;
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DumpInfo();
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}
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// Exit with error
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if (exitWithError) G4Exception("G4ParticleChange::CheckIt");
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//correction
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if (!itsOKforMomentum) {
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G4double vmag = theMomentumDirectionChange.mag();
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theMomentumDirectionChange = (1./vmag)*theMomentumDirectionChange;
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}
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if (!itsOKforGlobalTime) {
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theTimeChange = aTrack.GetGlobalTime();
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}
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if (!itsOKforProperTime) {
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theProperTimeChange = aTrack.GetProperTime();
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}
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if (!itsOKforEnergy) {
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theEnergyChange = 0.0;
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}
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itsOK = (itsOK) && G4VParticleChange::CheckIt(aTrack);
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return itsOK;
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}
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