ExtMuIonisation.h

Go to the documentation of this file.

//
// ********************************************************************
// * 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: ExtMuIonisation.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:     ExtMuIonisation
//
// 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
// 10-05-02 V.Ivanchenko update to new design
// 09-12-02 V.Ivanchenko remove warning
// 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)
// 23-05-03 Add fluctuation model as a member function (V.Ivanchenko)
// 03-06-03 Add SetIntegral method to choose fluctuation model (V.Ivanchenko)
// 03-06-03 Fix initialisation problem for STD ionisation (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)
// ------------------------------------------------------------------------------------
// 17-08-04 Rename the process "Mu" -> "mu" (V.Ivanchenko)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
 
// Class Description:
//
// This class manages the ionisation process for muons.
// it inherites from G4VContinuousDiscreteProcess via G4VEnergyLossProcess.
//
 
// -------------------------------------------------------------------
//
 
#ifndef ExtMuIonisation_h
#define ExtMuIonisation_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 G4ParticleChangeForLoss;
 
class ExtMuIonisation : public G4VEnergyLossProcess {
 
public:
  ExtMuIonisation( const G4String& name = "ExtmuIoni" );
 
  virtual ~ExtMuIonisation();
 
  G4bool IsApplicable( const G4ParticleDefinition& p ) {
    return ( p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0 * MeV );
  };
 
  G4double MinPrimaryEnergy( const G4ParticleDefinition* p, const G4Material*, G4double cut );
 
  /*  virtual std::vector<G4Track*>* SecondariesAlongStep(
                               const G4Step&,
                                     G4double&,
                                     G4double&,
                                     G4double&);
  */
 
  std::vector<G4DynamicParticle*>* SecondariesPostStep( G4VEmModel*,
                                                        const G4MaterialCutsCouple*,
                                                        const G4DynamicParticle*,
                                                        G4double& tcut );
 
  // Print out of the class parameters
  void PrintInfo();
 
protected:
  virtual void InitialiseEnergyLossProcess( const G4ParticleDefinition*,
                                            const G4ParticleDefinition* );
 
  //  virtual G4double MaxSecondaryEnergy(const G4DynamicParticle* dynParticle);
 
private:
  // hide assignment operator
  ExtMuIonisation& operator=( const ExtMuIonisation& right );
  ExtMuIonisation( const ExtMuIonisation& );
 
  G4double mass;
  G4double ratio;
 
  const G4ParticleDefinition* theParticle;
  const G4ParticleDefinition* theBaseParticle;
  G4VEmFluctuationModel*      flucModel;
 
  G4ParticleChangeForLoss* fParticleChange;
  //  G4bool                 subCutoff;
  G4bool isInitialised;
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline G4double ExtMuIonisation::MinPrimaryEnergy( const G4ParticleDefinition*,
                                                   const G4Material*, G4double cut ) {
  G4double x = 0.5 * cut / electron_mass_c2;
  G4double g = x * ratio + sqrt( ( 1. + x ) * ( 1. + x * ratio * ratio ) );
  return mass * ( g - 1.0 );
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
/*inline G4double ExtMuIonisation::MaxSecondaryEnergy(const G4DynamicParticle* dynParticle)
{
  G4double tau  = dynParticle->GetKineticEnergy()/mass;
  G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.0)/
                  (1. + 2.0*(tau + 1.0)*ratio + ratio*ratio);
 
  return tmax;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#include "G4VSubCutoffProcessor.hh"
*/
 
/*inline std::vector<G4DynamicParticle*>*  ExtMuIonisation::SecondariesAlongStep(
                           const G4Step&   step,
                                 G4double& tmax,
                                 G4double& eloss,
                                 G4double& kinEnergy)
{
  std::vector<G4Track*>* newp = 0;
  if(subCutoff) {
    G4VSubCutoffProcessor* sp = SubCutoffProcessor(CurrentMaterialCutsCoupleIndex());
    if (sp) {
      G4VEmModel* model = SelectModel(kinEnergy);
      newp = sp->SampleSecondaries(step,tmax,eloss,model);
    }
  }
  return newp;
}
*/
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
// #include "G4VEmModel.hh"
 
inline std::vector<G4DynamicParticle*>*
ExtMuIonisation::SecondariesPostStep( G4VEmModel* model, const G4MaterialCutsCouple* couple,
                                      const G4DynamicParticle* dp, G4double& tcut ) {
  //  return model->SampleSecondaries(couple, dp, tcut);
  return NULL; // No secondaries, for Track Extrapolation.(Wang L.L.)
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#endif