Gabriele Cosmo
141 lines
5.0 KiB
C++
141 lines
5.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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#ifndef G4Channeling_h
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#define G4Channeling_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "G4VDiscreteProcess.hh"
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#include "G4ChannelingMaterialData.hh"
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#include "G4ExtendedMaterial.hh"
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#include "G4LogicalCrystalVolume.hh"
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class G4ChannelingTrackData;
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class G4Channeling : public G4VDiscreteProcess
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{
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public:
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G4Channeling();
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virtual ~G4Channeling();
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virtual G4VParticleChange* PostStepDoIt(const G4Track&,
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const G4Step&);
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virtual G4bool IsApplicable(const G4ParticleDefinition& aPD){
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return(aPD.GetPDGCharge() != 0.);
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};
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virtual void BuildPhysicsTable(const G4ParticleDefinition&){;};
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protected:
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virtual G4double GetMeanFreePath(const G4Track&,
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G4double,
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G4ForceCondition*);
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private:
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G4ParticleDefinition* GetParticleDefinition(const G4Track& aTrack){
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return const_cast<G4ParticleDefinition*>(aTrack.GetParticleDefinition());
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}
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private:
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G4StepPoint* GetPre(const G4Track& aTrack){return aTrack.GetStep()->GetPreStepPoint();}
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G4StepPoint* GetPost(const G4Track& aTrack){return aTrack.GetStep()->GetPostStepPoint();}
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private:
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G4ChannelingMaterialData* GetMatData(const G4Track& aTrack){
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G4LogicalVolume* aLV = aTrack.GetVolume()->GetLogicalVolume();
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if(aLV->IsExtended() == true){
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G4ExtendedMaterial* aEM = (G4ExtendedMaterial*) aTrack.GetVolume()->GetLogicalVolume()->GetMaterial();
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return (G4ChannelingMaterialData*) aEM->RetrieveExtension("channeling");
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}
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else{
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return nullptr;
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}
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}
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//----------------------------------------
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// Functions for the calculations of
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// parameters related to channeling
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//----------------------------------------
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public:
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G4double GetCriticalAngle(const G4Track& aTrack){
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return std::sqrt(2.0*GetMatData(aTrack)->GetPot()->GetMaxMin()
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/GetPre(aTrack)->GetTotalEnergy());}
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G4double GetOscillationPeriod(const G4Track& aTrack){
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return (CLHEP::pi * GetMatData(aTrack)->GetPot()->GetIntSp(0)
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/ GetCriticalAngle(aTrack));
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}
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//----------------------------------------
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// Channeling Auxiliary Track Information
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//----------------------------------------
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private:
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G4int fChannelingID;
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G4ChannelingTrackData* GetTrackData(const G4Track&);
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//----------------------------------------
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// Variables for the integration
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// of the particle trajectory
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//----------------------------------------
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private:
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G4bool UpdateIntegrationStep(const G4Track&,
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G4ThreeVector&,
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G4double&);
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G4bool UpdateParameters(const G4Track&);
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void GetEF(const G4Track&,G4ThreeVector&,G4ThreeVector&);
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public:
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void PosToLattice(G4StepPoint* step,G4ThreeVector&);
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public:
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G4double GetTransverseVariationMax() {return fTransverseVariationMax;};
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void SetTransverseVariationMax(G4double aDouble) {fTransverseVariationMax = aDouble;};
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G4double GetTimeStepMin() {return fTimeStepMin;};
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void SetTimeStepMin(G4double aDouble) {fTimeStepMin = aDouble;};
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private:
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G4double fTimeStepMin;
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G4double fTimeStepMax;
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G4double fTransverseVariationMax;
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const G4ThreeVector k010;
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G4ThreeVector fSpin;
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};
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#endif
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