ExthIonisation.h

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// $Id: ExthIonisation.h,v 1.7 2022/01/26 03:16:33 wangll Exp $
// GEANT4 tag $Name: TrkExtAlg-00-00-67 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4hIonisation
//
// Author:        Laszlo Urban
//
// Creation date: 30.05.1997
//
// Modifications:
//
// corrected by L.Urban on 24/09/97
// corrected by L.Urban on 13/01/98
// bugs fixed by L.Urban on 02/02/99
// 10/02/00 modifications , new e.m. structure, L.Urban
// 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 14-08-01 new function ComputeRestrictedMeandEdx() + 'cleanup' (mma)
// 19-09-01 come back to previous process name "hIoni"
// 29-10-01 all static functions no more inlined
// 07-01-02 new design of em processes (V.Ivanchenko)
// 26-12-02 secondary production moved to derived classes (VI)
// 24-01-03 Make models region aware (V.Ivanchenko)
// 05-02-03 Fix compilation warnings (V.Ivanchenko)
// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
// 15-02-03 Add control on delta pointer (V.Ivanchenko)
// 23-05-03 Add fluctuation model as a member function (V.Ivanchenko)
// 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko)
// 16-06-03 ShortLived are not applicable any more (V.Ivanchenko)
// 08-08-03 STD substitute standard  (V.Ivanchenko)
// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
// 21-01-04 Migrade to G4ParticleChangeForLoss (V.Ivanchenko)
// ------------------------------------------------------------------------------------
// 15-04-05 Omit the correction of momentum direction due to production of secenderies.
//          This is needed for my Track Extrapotation. (L.L.Wang)
// ------------------------------------------------------------------------------------
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 11-04-04 Move MaxSecondaryEnergy to models (V.Ivanchenko)
//
// Class Description:
//
// This class manages the ionisation process for hadrons.
// it inherites from G4VContinuousDiscreteProcess via G4VEnergyLoss.
//
 
// -------------------------------------------------------------------
//
 
#ifndef ExthIonisation_h
#define ExthIonisation_h 1
 
#include "G4Electron.hh"
#include "G4PhysicalConstants.hh"
#include "G4Positron.hh"
#include "G4SystemOfUnits.hh"
#include "G4VEmModel.hh"
#include "G4VEnergyLossProcess.hh"
#include "globals.hh"
 
class G4Material;
class G4VEmFluctuationModel;
 
class ExthIonisation : public G4VEnergyLossProcess {
 
public:
  ExthIonisation( const G4String& name = "ExthIoni" );
 
  ~ExthIonisation();
 
  G4bool IsApplicable( const G4ParticleDefinition& p );
 
  G4double MinPrimaryEnergy( const G4ParticleDefinition* p, const G4Material*, G4double cut );
 
  virtual void PrintInfo();
  // Print out of the class parameters
 
protected:
  std::vector<G4DynamicParticle*>* SecondariesPostStep( G4VEmModel*,
                                                        const G4MaterialCutsCouple*,
                                                        const G4DynamicParticle*, G4double& );
 
  virtual void InitialiseEnergyLossProcess( const G4ParticleDefinition*,
                                            const G4ParticleDefinition* );
 
private:
  // hide assignment operator
  ExthIonisation& operator=( const ExthIonisation& right );
  ExthIonisation( const ExthIonisation& );
 
  G4double mass;
  G4double ratio;
 
  const G4ParticleDefinition* theParticle;
  const G4ParticleDefinition* theBaseParticle;
  G4VEmFluctuationModel*      flucModel;
 
  G4bool isInitialised;
 
  G4double eth;
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline G4bool ExthIonisation::IsApplicable( const G4ParticleDefinition& p ) {
  return ( p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0 * MeV && !p.IsShortLived() );
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline G4double ExthIonisation::MinPrimaryEnergy( const G4ParticleDefinition*,
                                                  const G4Material*, G4double cut ) {
  G4double x = 0.5 * cut / electron_mass_c2;
  G4double y = electron_mass_c2 / mass;
  G4double g = x * y + sqrt( ( 1. + x ) * ( 1. + x * y * y ) );
  return mass * ( g - 1.0 );
}
 
inline std::vector<G4DynamicParticle*>*
ExthIonisation::SecondariesPostStep( G4VEmModel* model, const G4MaterialCutsCouple* couple,
                                     const G4DynamicParticle* dp, G4double& tcut ) {
  //  return model->SampleSecondaries(couple, dp, tcut);
  return NULL;
} //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#endif