Gabriele Cosmo
276 lines
9.4 KiB
C++
276 lines
9.4 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 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: G4IMuEnergyLoss.hh,v 2.1 1998/08/23 11:50:51 urban Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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// $Id:
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// -------------------------------------------------------------------
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// GEANT 4 class header 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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// History: first implementation, based on object model of
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// 2nd December 1995, G.Cosmo
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// ---------- G4IMuEnergyLoss physics process -----------
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// by Laszlo Urban, September 1997
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// ********************************************************************
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// It is the implementation of the NEW UNIFIED ENERGY LOSS PROCESS.
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// It calculates the continuous energy loss for muons.
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// Processes giving contribution to the continuous loss :
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// ionisation (= cont.ion.loss + delta ray production)
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// bremsstrahlung
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// e+e- pair production
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// can be added more easily ..........
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// This class creates static muplus/muminus dE/dx and range tables ,
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// which tables can be used by other processes.
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// ************************************************************
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// some corrections by L.Urban on 27/05/98 , (but other corrections come soon!)
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// ------------------------------------------------------------
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#ifndef G4IMuEnergyLoss_h
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#define G4IMuEnergyLoss_h 1
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#include "G4ios.hh"
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#include <fstream.h>
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#include <iomanip.h>
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4IVContinuousDiscreteProcess.hh"
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#include "G4Material.hh"
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#include "G4Element.hh"
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#include "G4VParticleChange.hh"
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#include "globals.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4MuonMinus.hh"
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#include "G4MuonPlus.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4PhysicsLinearVector.hh"
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class G4IMuEnergyLoss : public G4IVContinuousDiscreteProcess
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{
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public:
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G4IMuEnergyLoss(const G4String& );
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G4IMuEnergyLoss(G4IMuEnergyLoss &);
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~G4IMuEnergyLoss();
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G4bool IsApplicable(const G4ParticleDefinition&);
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private:
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// hide assignment operator
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G4IMuEnergyLoss & operator=(const G4IMuEnergyLoss &right);
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public:
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G4double GetContinuousStepLimit(
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const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety) ;
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G4VParticleChange* AlongStepDoIt(const G4Track& track ,const G4Step& Step) ;
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virtual G4VParticleChange* PostStepDoIt(const G4Track& track,const G4Step& Step) = 0 ;
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// Build energy loss table (total continuous energy loss)
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void BuildDEDXTable(const G4ParticleDefinition& aParticleType);
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//----------------------------------------------
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// public functions .........................
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// get the number of processes contributing to the cont.energy loss
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static G4int GetNUMBEROFPROCESSES() { return NUMBEROFPROCESSES; };
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// set the number of processes contributing to the cont.energy loss
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static void SetNUMBEROFPROCESSES(G4int number)
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{ NUMBEROFPROCESSES=number ; };
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// Increment the number of processes contributing to the cont.energy loss
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static void PlusNUMBEROFPROCESSES()
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{ NUMBEROFPROCESSES++ ; };
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// decrement the number of processes contributing to the cont.energy loss
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static void MinusNUMBEROFPROCESSES()
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{ NUMBEROFPROCESSES-- ; };
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//*****************************************************************************
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//
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G4double GetConstraints(const G4DynamicParticle *aParticle,
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G4Material *aMaterial);
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G4double GetLossWithFluct(const G4DynamicParticle *aParticle,
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G4Material *aMaterial) ;
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protected:
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G4PhysicsTable* theLossTable ;
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static G4PhysicsTable* theDEDXmuplusTable ;
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static G4PhysicsTable* theDEDXmuminusTable ;
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static G4PhysicsTable* theRangemuplusTable ;
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static G4PhysicsTable* theRangemuminusTable ;
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static G4PhysicsTable* theInverseRangemuplusTable ;
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static G4PhysicsTable* theInverseRangemuminusTable ;
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static G4PhysicsTable* theLabTimemuplusTable ;
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static G4PhysicsTable* theLabTimemuminusTable ;
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static G4PhysicsTable* theProperTimemuplusTable ;
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static G4PhysicsTable* theProperTimemuminusTable ;
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static G4PhysicsTable* themuplusRangeCoeffATable;
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static G4PhysicsTable* themuplusRangeCoeffBTable;
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static G4PhysicsTable* themuplusRangeCoeffCTable;
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static G4PhysicsTable* themuminusRangeCoeffATable;
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static G4PhysicsTable* themuminusRangeCoeffBTable;
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static G4PhysicsTable* themuminusRangeCoeffCTable;
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static G4double CutInmupluslossTable;
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static G4double CutInmuminuslossTable;
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// processes inherited from G4IMuEnergyLoss
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// register themselves in the static array Recorder
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// nb of contributing processes = NUMBEROFPROCESSES
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static G4int NUMBEROFPROCESSES ;
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static G4PhysicsTable** RecorderOfmuplusProcess;
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static G4PhysicsTable** RecorderOfmuminusProcess;
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static G4int CounterOfmuplusProcess ;
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static G4int CounterOfmuminusProcess ;
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G4double RTable,LOGRTable; // LOGRTable=log(HighestKineticEnergy
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// /LowestKineticEnergy)/TotBin
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// RTable = exp(LOGRTable)
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// cut in range
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G4double CutInRange ;
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// last cut in range
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G4double lastCutInRange ;
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// particle mass
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G4double ParticleMass;
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G4double BIGSTEP ;
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private:
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// private functions ..................................
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void BuildRangeTable(const G4ParticleDefinition& aParticleType);
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void BuildInverseRangeTable(
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const G4ParticleDefinition& aParticleType);
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void BuildTimeTables(const G4ParticleDefinition& aParticleType);
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void BuildLabTimeVector(G4int materialIndex,
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G4PhysicsLogVector* rangeVector);
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void BuildProperTimeVector(G4int materialIndex,
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G4PhysicsLogVector* rangeVector);
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void InvertRangeVector(G4int materialIndex,
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G4PhysicsLogVector* rangeVector);
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void BuildRangeVector(G4int materialIndex,
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G4PhysicsLogVector* rangeVector);
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G4double LabTimeIntLog(G4PhysicsVector* physicsVector,G4int nbin);
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G4double ProperTimeIntLog(G4PhysicsVector* physicsVector,G4int nbin);
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G4double RangeIntLin(G4PhysicsVector* physicsVector,G4int nbin);
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G4double RangeIntLog(G4PhysicsVector* physicsVector,G4int nbin);
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void BuildRangeCoeffATable(const G4ParticleDefinition& aParticleType);
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void BuildRangeCoeffBTable(const G4ParticleDefinition& aParticleType);
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void BuildRangeCoeffCTable(const G4ParticleDefinition& aParticleType);
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private:
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G4PhysicsTable* theDEDXTable;
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G4PhysicsTable* theRangeTable;
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G4PhysicsTable* theInverseRangeTable;
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G4PhysicsTable* theLabTimeTable;
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G4PhysicsTable* theProperTimeTable;
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G4PhysicsTable** RecorderOfProcess;
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G4int CounterOfProcess;
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// private data members ...............................
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// fdEdx=(-dE/dx)
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// computed in GetConstraints at every call;
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G4double fdEdx;
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// fRangeNow is the actual range of the particle
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// computed in GetConstraints
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G4double fRangeNow ;
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// fMeanLoss is the energyloss without fluctuation
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// computed in AlongStepDoIt ;
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G4double fMeanLoss ;
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// EnergyBinNumber,RangeCoeffA,... are needed to compute range
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G4int EnergyBinNumber ;
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G4double RangeCoeffA,RangeCoeffB,RangeCoeffC ;
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//................................................................
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G4PhysicsTable* theRangeCoeffATable;
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G4PhysicsTable* theRangeCoeffBTable;
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G4PhysicsTable* theRangeCoeffCTable;
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// dToverTini is the maximum allowed deltarange/range in one Step
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// ( set in this class for the moment)
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const G4double dToverTini;
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// LowestKineticEnergy = lower limit of particle kinetic energy
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// HighestKineticEnergy = upper limit of particle kinetic energy
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// TotBin = number of bins
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// ---------in the energy loss/range tables-------------------
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const G4double LowestKineticEnergy;
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const G4double HighestKineticEnergy;
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G4int TotBin;// number of bins in table, calculated in BuildPhysicsTable
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// from LowestKineticEnergy,HighestKineticEnergy and
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// dToverTini
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// variables for the integration routines
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G4double taulow,tauhigh,ltaulow,ltauhigh;
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// cuts in kinetic energy ........
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G4double* ParticleCutInKineticEnergy ;
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G4double ParticleCutInKineticEnergyNow ;
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// ...............
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const G4Electron* theElectron;
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const G4Positron* thePositron;
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const G4MuonPlus* theMuonPlus;
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const G4MuonMinus* theMuonMinus;
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// data members to speed up the fluctuation calculation
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G4Material *lastMaterial ;
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G4double f1Fluct,f2Fluct,e1Fluct,e2Fluct,rateFluct,ipotFluct;
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G4double e1LogFluct,e2LogFluct,ipotLogFluct;
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const G4double MaxExcitationNumber ;
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const G4double probLimFluct ;
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const long nmaxDirectFluct,nmaxCont1,nmaxCont2 ;
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};
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#include "G4IMuEnergyLoss.icc"
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#endif
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