Gabriele Cosmo
194 lines
6.3 KiB
C++
194 lines
6.3 KiB
C++
// This code implementation is the intellectual property of
|
|
// the GEANT4 collaboration.
|
|
//
|
|
// By copying, distributing or modifying the Program (or any work
|
|
// based on the Program) you indicate your acceptance of this statement,
|
|
// and all its terms.
|
|
//
|
|
// $Id: G4PropagatorInField.hh,v 1.10 2000/11/01 16:51:07 gcosmo Exp $
|
|
// GEANT4 tag $Name: geant4-03-00 $
|
|
//
|
|
//
|
|
// class G4PropagatorInField
|
|
//
|
|
// Class description:
|
|
//
|
|
// This class performs the navigation/propagation of a particle/track
|
|
// in a magnetic field. The field is in general non-uniform.
|
|
// For the calculation of the path, it relies on the class G4MagTr.
|
|
// To create an object, must have an object that calculates the Curved
|
|
// paths and also must know the value of the maximum displacement allowed.
|
|
//
|
|
// Methods:
|
|
// ComputeStep(..)
|
|
// CalculateStepTimeAndAccuracy(..)
|
|
// LocateIntersectionPoint(..)
|
|
|
|
// History:
|
|
// -------
|
|
// 25.10.96 John Apostolakis, design and implementation
|
|
// 25.03.97 John Apostolakis, adaptation for G4Transportation and cleanup
|
|
// ------------------------------------------------------------------------
|
|
|
|
#ifndef G4PropagatorInField_hh
|
|
#define G4PropagatorInField_hh 1
|
|
|
|
#include "globals.hh"
|
|
#include "G4FieldTrack.hh"
|
|
// #include "G4VPhysicalVolume.hh"
|
|
// class G4VPhysicalVolume;
|
|
|
|
#include "G4Navigator.hh"
|
|
#include "G4ChordFinder.hh"
|
|
|
|
#include "G4FieldManager.hh"
|
|
|
|
// #include "G4MagIntegratorDriver.hh"
|
|
|
|
class G4PropagatorInField
|
|
{
|
|
|
|
public: // with description
|
|
|
|
G4PropagatorInField( G4Navigator *theNavigator,
|
|
G4FieldManager *detectorFieldMgr);
|
|
|
|
G4PropagatorInField( G4Navigator *theNavigator );
|
|
~G4PropagatorInField(){};
|
|
|
|
G4double ComputeStep(G4FieldTrack &pFieldTrack,
|
|
G4double pCurrentProposedStepLength,
|
|
G4double &pNewSafety,
|
|
G4VPhysicalVolume *pPhysVol=0 );
|
|
|
|
G4double ComputeStep(const G4ThreeVector &pGlobalPoint,
|
|
const G4ThreeVector &pCurveTangent, // Unit vector
|
|
G4double pCurrentProposedStepLength,
|
|
G4double &pNewSafety,
|
|
G4VPhysicalVolume *pPhysVol=0 );
|
|
// Compute the next geometric Step
|
|
|
|
inline G4ThreeVector EndPosition() const;
|
|
inline G4ThreeVector EndMomentumDir() const;
|
|
inline G4bool IsParticleLooping() const;
|
|
// Return the state after the Step
|
|
|
|
inline G4double DeltaIntersection() const;
|
|
// The accuracy of finding an intersection
|
|
|
|
G4double DeltaOneStep();
|
|
// The accuracy of a single Step
|
|
|
|
inline G4double GetEpsilonStep() const;
|
|
// Relative accuracy for current Step (Calc.)
|
|
inline void SetEpsilonStep(G4double newEps);
|
|
// The ratio DeltaOneStep()/h_current_step
|
|
|
|
inline void SetChargeMomentumMass(G4double Charge, // in e+ units
|
|
G4double Momentum, // in Geant4 units
|
|
G4double pMass);
|
|
|
|
inline G4ChordFinder* GetChordFinder();
|
|
// void SetChordFinder(G4ChordFinder* newCF); // Not yet relevant
|
|
|
|
inline G4int SetVerboseLevel( G4int Verbose );
|
|
inline G4int Verbose() const;
|
|
|
|
inline G4double GetDeltaIntersection() const;
|
|
// Accuracy for boundary intersection.
|
|
inline G4double GetDeltaOneStep() const;
|
|
// Accuracy for one tracking/physics step.
|
|
|
|
inline void SetAccuraciesWithDeltaOneStep(G4double deltaOneStep);
|
|
// Sets both accuracies, maintaining a particular ratio
|
|
// for accuracties of volume Intersection and Integration (in One Step)
|
|
|
|
inline void SetDeltaOneStep(G4double deltaOneStep);
|
|
// Set accuracy for integration of one step. (only)
|
|
inline void SetDeltaIntersection(G4double deltaIntersection);
|
|
// Set accuracy of intersection of a volume. (only)
|
|
|
|
inline G4int GetMaxLoopCount() const;
|
|
inline void SetMaxLoopCount(G4int new_max);
|
|
// A maximum for the number of steps that a (looping) particle can take.
|
|
|
|
void printStatus(
|
|
const G4FieldTrack& StartFT,
|
|
const G4FieldTrack& CurrentFT,
|
|
G4double requestStep,
|
|
G4double safety,
|
|
G4int Step,
|
|
G4VPhysicalVolume* startVolume);
|
|
// Print Method - useful mostly for debugging.
|
|
|
|
inline G4FieldTrack GetEndState() const;
|
|
|
|
public: // without description
|
|
|
|
// void SetGlobalFieldMgr( G4FieldManager *detectorFieldMgr );
|
|
// The Field Manager of the Detector.
|
|
|
|
private:
|
|
|
|
G4bool LocateIntersectionPoint(
|
|
const G4FieldTrack& CurveStartPointTangent, // A
|
|
const G4FieldTrack& CurveEndPointTangent, // B
|
|
const G4ThreeVector& TrialPoint, // E
|
|
G4FieldTrack& IntersectPointTangent); // Output
|
|
// If such an intersection exists, this function
|
|
// calculate the intersection point of the true path of the particle
|
|
// with the surface of the current volume (or of one of its daughters).
|
|
// (Should use lateral displacement as measure of convergence).
|
|
|
|
|
|
// DATA Members
|
|
// ----------------------------------------------------------------------
|
|
|
|
private:
|
|
|
|
G4FieldManager *fDetectorFieldMgr;
|
|
// The Field Manager of the whole Detector.
|
|
|
|
G4Navigator *fNavigator;
|
|
|
|
// STATE information
|
|
// ------------------
|
|
|
|
G4double fEpsilonStep;
|
|
// Relative accuracy for current Step (Calc.)
|
|
|
|
G4FieldTrack End_PointAndTangent;
|
|
// End point storage
|
|
|
|
G4bool fParticleIsLooping;
|
|
|
|
G4int fVerboseLevel;
|
|
// For debuging purposes
|
|
|
|
// Values for the required accuracies
|
|
//
|
|
G4double fDelta_One_Step_Value; // for one tracking/physics step
|
|
G4double fDelta_Intersection_Val; // for boundary intersection
|
|
|
|
// Their default values ... (set in G4PropagatemagField.cc)
|
|
//
|
|
static const G4double fDefault_Delta_One_Step_Value; // = 0.25 * mm;
|
|
static const G4double fDefault_Delta_Intersection_Val; // = 0.1 * mm;
|
|
|
|
G4int fmax_loop_count;
|
|
|
|
// Variables to keep track of "abnormal" case - which causes loop
|
|
//
|
|
G4int fNoZeroStep; // Counter of zeroStep
|
|
G4int fThresholdNo_ZeroSteps; // Threshold: above this - action
|
|
// G4double fMidPoint_CurveLen_of_LastAttempt= -1;
|
|
G4double fFull_CurveLen_of_LastAttempt;
|
|
G4double fLast_ProposedStepLength;
|
|
};
|
|
|
|
// Defines the constructor.
|
|
//
|
|
#include "G4PropagatorInField.icc"
|
|
|
|
#endif
|