Gabriele Cosmo
211 lines
7.6 KiB
C++
211 lines
7.6 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. *
|
|
// * *
|
|
// * 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 1.15.2.1 2001/06/28 19:09:40 gunter Exp $
|
|
// GEANT4 tag $Name: $
|
|
//
|
|
//
|
|
// 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 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 for the Global (Detector) field,
|
|
// maintaining a particular ratio for accuracties
|
|
// of volume Intersection and Integration (in One Step).
|
|
|
|
inline void SetDeltaIntersection(G4double deltaIntersection);
|
|
// Set accuracy of intersection of a volume. (only)
|
|
inline void SetDeltaOneStep(G4double deltaOneStep);
|
|
// Set accuracy for integration of one step. (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;
|
|
|
|
// Minimum for Relative accuracy of any Step
|
|
inline G4double GetMinimumEpsilonStep() const;
|
|
inline void SetMinimumEpsilonStep(G4double newEpsMin);
|
|
|
|
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. (default)
|
|
|
|
G4FieldManager *fCurrentFieldMgr;
|
|
// The Field Manager of the current volume (may be the one above.)
|
|
|
|
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 small possible relative accuracy of a step
|
|
// (corresponding to the greatest possible integration accuracy)
|
|
|
|
// Minimum for Relative accuracy of any Step
|
|
G4double fEpsilonMin;
|
|
static const G4double fEpsilonMinDefault; // 1.0e-10 ;
|
|
|
|
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
|
|
|
|
|