ExteIonisation.cxx

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// $Id: ExteIonisation.cxx,v 1.8 2022/01/26 03:16:33 wangll Exp $
// GEANT4 tag $Name: TrkExtAlg-00-00-67 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     ExteIonisation
//
// Author:        Laszlo Urban
//
// Creation date: 20.03.1997
//
// Modifications:
//
// 07-04-98 remove 'tracking cut' of the ionizing particle, mma
// 04-09-98 new methods SetBining() PrintInfo()
// 07-09-98 Cleanup
// 02-02-99 correction inDoIt , L.Urban
// 10-02-00 modifications , new e.m. structure, L.Urban
// 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
// 09-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 13-08-01 new function ComputeRestrictedMeandEdx()  (mma)
// 17-09-01 migration of Materials to pure STL (mma)
// 21-09-01 completion of RetrievePhysicsTable() (mma)
// 29-10-01 all static functions no more inlined (mma)
// 07-11-01 particleMass and Charge become local variables
// 26-03-02 change access to cuts in BuildLossTables (V.Ivanchenko)
// 30-04-02 V.Ivanchenko update to new design
// 23-12-02 Change interface in order to move to cut per region (VI)
// 26-12-02 Secondary production moved to derived classes (VI)
// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
// 23-05-03 Define default integral + BohrFluctuations (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)
// ------------------------------------------------------------------------------------
// 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)
//
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#include "ExteIonisation.h"
#include "G4BohrFluctuations.hh"
#include "G4Electron.hh"
#include "G4MollerBhabhaModel.hh"
#include "G4SystemOfUnits.hh"
#include "G4UnitsTable.hh"
#include "G4UniversalFluctuation.hh"
 
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using namespace std;
 
ExteIonisation::ExteIonisation( const G4String& name )
    : G4VEnergyLossProcess( name )
    , theElectron( G4Electron::Electron() )
    , isElectron( true )
    , isInitialised( false ) {
  SetDEDXBinning( 120 );
  // SetLambdaBinning(120);
  SetMinKinEnergy( 0.1 * keV );
  SetMaxKinEnergy( 100.0 * TeV );
  SetLossFluctuations( false );
}
 
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ExteIonisation::~ExteIonisation() {}
 
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void ExteIonisation::InitialiseEnergyLossProcess( const G4ParticleDefinition* part,
                                                  const G4ParticleDefinition* ) {
  if ( !isInitialised )
  {
    if ( part == G4Positron::Positron() ) isElectron = false;
    SetSecondaryParticle( theElectron );
 
    flucModel = new G4UniversalFluctuation();
 
    G4VEmModel* em = new G4MollerBhabhaModel();
    em->SetLowEnergyLimit( 0.1 * keV );
    em->SetHighEnergyLimit( 100.0 * TeV );
    AddEmModel( 1, em, flucModel );
    isInitialised = true;
  }
}
 
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void ExteIonisation::PrintInfo() {
  G4cout << "      Delta cross sections from Moller+Bhabha, "
         << "good description from 1 KeV to 100 GeV." << G4endl;
}
 
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