Gabriele Cosmo
190 lines
8.1 KiB
C++
190 lines
8.1 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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//
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//
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// class G4FieldTrack
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//
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// Class description:
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//
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// Data structure bringing together a magnetic track's state.
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// (position, momentum direction & modulus, energy, spin, ... )
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// Uses/abilities:
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// - does not maintain any relationship between its data (eg energy/momentum).
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// - for use in Runge-Kutta solver (in passing it the values right now).
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// History
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// - First version: Oct 14, 1996 John Apostolakis
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// - Modified: Oct 24, 1996 JA: Added dist_on_curve, deleted constructor
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// Nov 5, 1998 JA: Added energy, momentum, TOF, spin &
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// several constructor, access, set methods
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// May 10, 2006 JA: Added charge, "default" constructor
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// -------------------------------------------------------------------
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#ifndef G4FieldTrack_HH
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#define G4FieldTrack_HH
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#include "G4ThreeVector.hh"
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#include "G4ChargeState.hh"
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class G4FieldTrack
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{
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public: // with description
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G4FieldTrack( const G4ThreeVector& pPosition,
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G4double LaboratoryTimeOfFlight,
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const G4ThreeVector& pMomentumDirection,
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G4double kineticEnergy,
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G4double restMass_c2,
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G4double charge,
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const G4ThreeVector& polarization,
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G4double magnetic_dipole_moment= 0.0,
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G4double curve_length= 0.0,
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G4double PDGspin = -1.0 );
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G4FieldTrack( const G4FieldTrack& pFieldTrack );
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G4FieldTrack( char ); // Almost default constructor
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~G4FieldTrack();
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// End of preferred Constructors / Destructor
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inline void
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UpdateState( const G4ThreeVector& pPosition,
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G4double LaboratoryTimeOfFlight,
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const G4ThreeVector& pMomentumDirection,
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G4double kineticEnergy);
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// Update four-vectors for space/time and momentum/energy
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// Also resets curve length.
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inline
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void UpdateFourMomentum( G4double kineticEnergy,
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const G4ThreeVector& momentumDirection );
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// Update momentum (and direction), and kinetic energy
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void SetChargeAndMoments(G4double charge,
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G4double magnetic_dipole_moment= DBL_MAX,
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G4double electric_dipole_moment= DBL_MAX,
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G4double magnetic_charge=DBL_MAX );
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// Sets the charges and moments that are not given as DBL_MAX
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inline void SetPDGSpin(G4double pdgSpin){ fChargeState.SetPDGSpin(pdgSpin); }
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inline G4double GetPDGSpin(){ return fChargeState.GetPDGSpin(); }
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G4FieldTrack( const G4ThreeVector& pPosition,
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const G4ThreeVector& pMomentumDirection,
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G4double curve_length,
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G4double kineticEnergy,
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const G4double restMass_c2,
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G4double velocity,
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G4double LaboratoryTimeOfFlight=0.0,
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G4double ProperTimeOfFlight=0.0,
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const G4ThreeVector* pPolarization=0,
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G4double PDGspin = -1.0 );
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// Older constructor
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// ---> Misses charge !!!
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inline G4FieldTrack& operator = ( const G4FieldTrack & rStVec );
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// Assignment operator
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inline G4ThreeVector GetMomentum() const;
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inline G4ThreeVector GetPosition() const;
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inline const G4ThreeVector& GetMomentumDir() const;
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inline G4ThreeVector GetMomentumDirection() const;
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inline G4double GetCurveLength() const;
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// Distance along curve of point.
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inline G4ThreeVector GetPolarization() const;
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inline void SetPolarization( const G4ThreeVector& vecPol );
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inline G4double GetLabTimeOfFlight() const;
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inline G4double GetProperTimeOfFlight() const;
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inline G4double GetKineticEnergy() const;
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inline G4double GetCharge() const;
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inline G4double GetRestMass() const { return fRestMass_c2; }
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// Accessors.
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inline void SetPosition(G4ThreeVector nPos);
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inline void SetMomentum(G4ThreeVector nMomDir);
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// Does change mom-dir too.
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inline void SetMomentumDir(G4ThreeVector nMomDir);
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// Does NOT change Momentum or Velocity Vector.
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inline void SetRestMass(G4double Mass_c2) { fRestMass_c2= Mass_c2; }
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inline void SetCurveLength(G4double nCurve_s);
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// Distance along curve.
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inline void SetKineticEnergy(G4double nEnergy);
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// Does not modify momentum.
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inline void SetLabTimeOfFlight(G4double tofLab);
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inline void SetProperTimeOfFlight(G4double tofProper);
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// Modifiers
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public: // without description
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enum { ncompSVEC = 12 };
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// Needed and should be used only for RK integration driver
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inline void DumpToArray(G4double valArr[ncompSVEC]) const;
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void LoadFromArray(const G4double valArr[ncompSVEC],
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G4int noVarsIntegrated);
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friend std::ostream&
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operator<<( std::ostream& os, const G4FieldTrack& SixVec);
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public: // Obsolete methods -- due to potential confusion with PDG spin
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inline void InitialiseSpin( const G4ThreeVector& vecPolarization )
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{ SetPolarization( vecPolarization ); }
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inline G4ThreeVector GetSpin() const { return GetPolarization(); }
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inline void SetSpin(G4ThreeVector vSpin){ SetPolarization(vSpin); }
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private: // Implementation method -- Obsolete
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inline G4FieldTrack& SetCurvePnt(const G4ThreeVector& pPosition,
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const G4ThreeVector& pMomentum,
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G4double s_curve );
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private:
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G4double SixVector[6];
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G4double fDistanceAlongCurve; // distance along curve of point
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G4double fKineticEnergy;
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G4double fRestMass_c2;
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G4double fLabTimeOfFlight;
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G4double fProperTimeOfFlight;
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G4ThreeVector fPolarization;
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G4ThreeVector fMomentumDir;
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// G4double fInitialMomentumMag; // At 'track' creation.
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// G4double fLastMomentumMag; // From last Update (for checking.)
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G4ChargeState fChargeState;
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public: // Access
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const G4ChargeState* GetChargeState() const { return &fChargeState; }
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};
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#include "G4FieldTrack.icc"
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#endif /* End of ifndef G4FieldTrack_HH */
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