// 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: G4hLowEnergyLoss.hh,v 1.9 2000/11/03 10:29:51 pia Exp $ // GEANT4 tag $Name: geant4-03-00 $ // // $Id: // ------------------------------------------------------------ // GEANT 4 class header file // // For information related to this code contact: // CERN, IT Division, ASD group // History: first implementation, based on object model of // 2nd December 1995, G.Cosmo // ---------- G4hEnergyLoss physics process ----------- // by Laszlo Urban, 30 May 1997 // // ************************************************************ // It is the first implementation of the NEW UNIFIED ENERGY LOSS PROCESS. // It calculates the continuous energy loss for charged hadrons. // Processes giving contribution to the continuous loss : // ionisation (= cont.ion.loss + delta ray production) // can be added more easily .......... // This class creates static proton/antiproton dE/dx and range tables , // which tables can be used by other processes. // The energy loss for other charged hadrons is calculated from the p/pbar // tables with scaled kinetic energy. // // **************************************************************************** // It is assumed that the cut in range is the same for all the charged hadrons! // **************************************************************************** // // 7/10/98 some bugs fixed + some cleanup , L.Urban // 22/10/98 cleanup , L.Urban // 02/02/99 several bugs fixed, L.Urban // 31/03/00 V.Ivanchenko rename to lowenergy as G4hLowEnergyLoss.hh // 09/08/00 V.Ivanchenko remove GetContinuousStepLimit and IsApplicable // // Class description: // Class for Low Energy electromagnetic energy loss of hadrons // Further documentation available from http://www.ge.infn.it/geant4/lowE // **************************************************************************** #ifndef G4hLowEnergyLoss_h #define G4hLowEnergyLoss_h 1 #include "G4ios.hh" #include "globals.hh" #include "Randomize.hh" #include "G4VContinuousDiscreteProcess.hh" #include "G4Material.hh" #include "G4Element.hh" #include "G4Proton.hh" #include "G4AntiProton.hh" #include "G4Electron.hh" #include "G4VParticleChange.hh" #include "G4Track.hh" #include "G4Step.hh" #include "G4PhysicsLogVector.hh" #include "G4PhysicsLinearVector.hh" class G4EnergyLossMessenger; class G4hLowEnergyLoss : public G4VContinuousDiscreteProcess { public: G4hLowEnergyLoss(const G4String& ); ~G4hLowEnergyLoss(); virtual G4double GetMeanFreePath( const G4Track& track, G4double previousStepSize, enum G4ForceCondition* condition ) = 0 ; virtual G4VParticleChange* PostStepDoIt(const G4Track& track, const G4Step& Step) = 0 ; protected: private: // hide assignment operator G4hLowEnergyLoss(G4hLowEnergyLoss &); G4hLowEnergyLoss & operator=(const G4hLowEnergyLoss &right); // ===================================================================== public: private: // variables for the integration routines static G4double Mass,taulow,tauhigh,ltaulow,ltauhigh; protected: G4Material *lastMaterial ; const G4double MaxExcitationNumber ; const G4double probLimFluct ; const long nmaxDirectFluct,nmaxCont1,nmaxCont2 ; // ==================================================================== // static part of the class public: // get the number of processes contributing to the cont.energy loss static G4int GetNumberOfProcesses() { return NumberOfProcesses; }; // set the number of processes contributing to the cont.energy loss static void SetNumberOfProcesses(G4int number) {NumberOfProcesses=number ; }; // Increment the number of processes contributing to the cont.energy loss static void PlusNumberOfProcesses() { NumberOfProcesses++ ; }; // decrement the number of processes contributing to the cont.energy loss static void MinusNumberOfProcesses() { NumberOfProcesses-- ; }; static void SetdRoverRange(G4double value) {dRoverRange = value;} static void SetRndmStep (G4bool value) {rndmStepFlag = value;} static void SetEnlossFluc (G4bool value) {EnlossFlucFlag = value;} static void SetStepFunction (G4double c1, G4double c2) {dRoverRange = c1; finalRange = c2; c1lim=dRoverRange ; c2lim=2.*(1-dRoverRange)*finalRange; c3lim=-(1.-dRoverRange)*finalRange*finalRange; } protected: static void BuildDEDXTable(const G4ParticleDefinition& aParticleType); private: static void BuildRangeTable(const G4ParticleDefinition& aParticleType); static void BuildInverseRangeTable( const G4ParticleDefinition& aParticleType); static void BuildTimeTables(const G4ParticleDefinition& aParticleType); static void BuildLabTimeVector(G4int materialIndex, G4PhysicsLogVector* rangeVector); static void BuildProperTimeVector(G4int materialIndex, G4PhysicsLogVector* rangeVector); static void InvertRangeVector(G4int materialIndex, G4PhysicsLogVector* rangeVector); static void BuildRangeVector(G4int materialIndex, G4PhysicsLogVector* rangeVector); static G4double LabTimeIntLog(G4PhysicsVector* physicsVector ,G4int nbin); static G4double ProperTimeIntLog(G4PhysicsVector* physicsVector, G4int nbin); static G4double RangeIntLin(G4PhysicsVector* physicsVector ,G4int nbin); static G4double RangeIntLog(G4PhysicsVector* physicsVector ,G4int nbin); static void BuildRangeCoeffATable( const G4ParticleDefinition& aParticleType); static void BuildRangeCoeffBTable( const G4ParticleDefinition& aParticleType); static void BuildRangeCoeffCTable( const G4ParticleDefinition& aParticleType); // ==================================================================== public: protected: static G4PhysicsTable* theDEDXpTable ; static G4PhysicsTable* theDEDXpbarTable ; static G4PhysicsTable* theRangepTable ; static G4PhysicsTable* theRangepbarTable ; //inverse of the range tables static G4PhysicsTable* theInverseRangepTable ; static G4PhysicsTable* theInverseRangepbarTable ; //lab and proper time tables static G4PhysicsTable* theLabTimepTable ; static G4PhysicsTable* theLabTimepbarTable ; static G4PhysicsTable* theProperTimepTable ; static G4PhysicsTable* theProperTimepbarTable ; // processes inherited from G4hLowEnergyLoss // register themselves in the static array Recorder static G4PhysicsTable** RecorderOfpProcess; static G4PhysicsTable** RecorderOfpbarProcess; static G4int CounterOfpProcess ; static G4int CounterOfpbarProcess ; // particle mass static G4double ParticleMass ; // cut in range static G4double ptableElectronCutInRange; static G4double pbartableElectronCutInRange; static G4double Charge ; static G4double LowestKineticEnergy; static G4double HighestKineticEnergy; static G4int TotBin; // number of bins in table, // calculated in BuildPhysicsTable static G4double RTable,LOGRTable; // LOGRTable=log(HighestKineticEnergy // /LowestKineticEnergy)/TotBin // RTable = exp(LOGRTable) private: static G4PhysicsTable* theDEDXTable; static G4PhysicsTable* theRangeTable; static G4PhysicsTable* theInverseRangeTable; static G4PhysicsTable* theLabTimeTable; static G4PhysicsTable* theProperTimeTable; static G4PhysicsTable** RecorderOfProcess; static G4int CounterOfProcess; static G4PhysicsTable* thepRangeCoeffATable; static G4PhysicsTable* thepRangeCoeffBTable; static G4PhysicsTable* thepRangeCoeffCTable; static G4PhysicsTable* thepbarRangeCoeffATable; static G4PhysicsTable* thepbarRangeCoeffBTable; static G4PhysicsTable* thepbarRangeCoeffCTable; static G4PhysicsTable* theRangeCoeffATable; static G4PhysicsTable* theRangeCoeffBTable; static G4PhysicsTable* theRangeCoeffCTable; static G4int NumberOfProcesses ; static G4double dRoverRange ; // maximum allowed deltarange/range // in one step protected: G4PhysicsTable* theLossTable ; G4double linLossLimit ; G4double MinKineticEnergy ; static G4double finalRange ; // last step before stop static G4double c1lim,c2lim,c3lim ; // coeffs for computing steplimit static G4bool rndmStepFlag ; static G4bool EnlossFlucFlag ; }; #endif