G4eIonisation.cc

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// $Id: G4eIonisation.cc 107058 2017-11-01 14:54:12Z gcosmo $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4eIonisation
//
// 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)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 12-08-05 SetStepLimits(0.2, 0.1*mm) (mma)
// 02-09-05 Return SetStepLimits(1, 1*mm) (V.Ivantchenko)
// 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
// 14-01-07 use SetEmModel() and SetFluctModel() from G4VEnergyLossProcess (mma)
//
// -------------------------------------------------------------------
//
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#include "G4eIonisation.hh"
#include "G4Electron.hh"
#include "G4MollerBhabhaModel.hh"
#include "G4UniversalFluctuation.hh"
#include "G4BohrFluctuations.hh"
#include "G4UnitsTable.hh"
#include "G4EmParameters.hh"

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using namespace std;

G4eIonisation::G4eIonisation(const G4String& name)
  : G4VEnergyLossProcess(name),
    theElectron(G4Electron::Electron()),
    isElectron(true),
    isInitialised(false)
{
  SetProcessSubType(fIonisation);
  SetSecondaryParticle(theElectron);
}

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G4eIonisation::~G4eIonisation()
{}

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G4double G4eIonisation::MinPrimaryEnergy(const G4ParticleDefinition*,
           const G4Material*,
           G4double cut)
{
  G4double x = cut;
  if(isElectron) x += cut;
  return x;
}

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G4bool G4eIonisation::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == theElectron || &p == G4Positron::Positron());
}

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void G4eIonisation::InitialiseEnergyLossProcess(
        const G4ParticleDefinition* part,
        const G4ParticleDefinition*)
{
  if(!isInitialised) {
    if(part != theElectron) { isElectron = false; }
    if (!EmModel(0)) { SetEmModel(new G4MollerBhabhaModel()); }
    G4EmParameters* param = G4EmParameters::Instance();
    EmModel(0)->SetLowEnergyLimit(param->MinKinEnergy());
    EmModel(0)->SetHighEnergyLimit(param->MaxKinEnergy());
    if (!FluctModel()) { SetFluctModel(new G4UniversalFluctuation()); }
                
    AddEmModel(1, EmModel(), FluctModel());
    isInitialised = true;
  }
}

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void G4eIonisation::PrintInfo()
{}

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void G4eIonisation::ProcessDescription(std::ostream& out) const
{
  out << "<strong>Ionisation</strong>";
  G4VEnergyLossProcess::ProcessDescription(out);
}

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