PhysListEmStandard.cc

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//
// $Id: PhysListEmStandard.cc,v 1.24 2009-11-15 22:10:03 maire Exp $
// GEANT4 tag $Name: geant4-09-04-patch-02 $
//
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#include "PhysListEmStandard.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4ProcessManager.hh"

#include "G4ComptonScattering.hh"
#include "G4GammaConversion.hh"
#include "G4PhotoElectricEffect.hh"

#include "G4eMultipleScattering.hh"
#include "G4UrbanMscModel.hh"
#include "G4eIonisation.hh"
#include "G4eBremsstrahlung.hh"
#include "G4eplusAnnihilation.hh"

#include "G4MuMultipleScattering.hh"
#include "G4MuIonisation.hh"
#include "G4MuBremsstrahlung.hh"
#include "G4MuPairProduction.hh"

#include "G4hMultipleScattering.hh"
#include "G4hIonisation.hh"
#include "G4hBremsstrahlung.hh"
#include "G4hPairProduction.hh"

#include "G4ionIonisation.hh"
#include "G4IonParametrisedLossModel.hh"
#include "G4NuclearStopping.hh"

#include "G4EmProcessOptions.hh"
#include "G4MscStepLimitType.hh"

#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

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PhysListEmStandard::PhysListEmStandard(const G4String& name)
   :  G4VPhysicsConstructor(name)
{}

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PhysListEmStandard::~PhysListEmStandard()
{}

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void PhysListEmStandard::ConstructProcess()
{
  // Add standard EM Processes
  //
  G4ParticleTable::G4PTblDicIterator* theParticleIterator = G4ParticleTable::GetParticleTable()->GetIterator();
  theParticleIterator->reset();
  while( (*theParticleIterator)() ){
    G4ParticleDefinition* particle = theParticleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();
    G4String particleName = particle->GetParticleName();

    if (particleName == "gamma") {
      // gamma
      pmanager->AddDiscreteProcess(new G4PhotoElectricEffect);
      pmanager->AddDiscreteProcess(new G4ComptonScattering);
      pmanager->AddDiscreteProcess(new G4GammaConversion);

    } else if (particleName == "e-") {
      //electron
      G4eMultipleScattering* msc = new G4eMultipleScattering();
      msc->AddEmModel(0, new G4UrbanMscModel());
      pmanager->AddProcess(msc,                       -1, 1, 1);
      pmanager->AddProcess(new G4eIonisation,         -1, 2, 2);
      pmanager->AddProcess(new G4eBremsstrahlung,     -1, 3, 3);

    } else if (particleName == "e+") {
      //positron
      G4eMultipleScattering* msc = new G4eMultipleScattering();
      msc->AddEmModel(0, new G4UrbanMscModel());
      pmanager->AddProcess(msc,                       -1, 1, 1);
      pmanager->AddProcess(new G4eIonisation,         -1, 2, 2);
      pmanager->AddProcess(new G4eBremsstrahlung,     -1, 3, 3);
      pmanager->AddProcess(new G4eplusAnnihilation,    0,-1, 4);

    } else if (particleName == "mu+" ||
               particleName == "mu-"    ) {
      //muon
      pmanager->AddProcess(new G4MuMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(new G4MuIonisation,         -1, 2, 2);
      pmanager->AddProcess(new G4MuBremsstrahlung,     -1, 3, 3);
      pmanager->AddProcess(new G4MuPairProduction,     -1, 4, 4);

    } else if( particleName == "proton" ||
               particleName == "pi-" ||
               particleName == "pi+"    ) {
      //proton
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(new G4hIonisation,         -1, 2, 2);
      pmanager->AddProcess(new G4hBremsstrahlung,     -1, 3, 3);
      pmanager->AddProcess(new G4hPairProduction,     -1, 4, 4);

    } else if( particleName == "alpha" ||
          particleName == "He3"    ) {
      //alpha
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(new G4ionIonisation,       -1, 2, 2);
      pmanager->AddProcess(new G4NuclearStopping,     -1, 3,-1);

    } else if( particleName == "GenericIon" ) {
      //Ions
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      G4ionIonisation* ionIoni = new G4ionIonisation();
      ionIoni->SetEmModel(new G4IonParametrisedLossModel());
      pmanager->AddProcess(ionIoni,                   -1, 2, 2);
      pmanager->AddProcess(new G4NuclearStopping,     -1, 3,-1);

    } else if ((!particle->IsShortLived()) &&
          (particle->GetPDGCharge() != 0.0) &&
          (particle->GetParticleName() != "chargedgeantino")) {
      //all others charged particles except geantino
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(new G4hIonisation,         -1, 2, 2);
    }
  }

  // Em options
  //
  // Main options and setting parameters are shown here.
  // Several of them have default values.
  //
  G4EmProcessOptions emOptions;

  //physics tables
  //
  emOptions.SetMinEnergy(100*eV);   //default
  emOptions.SetMaxEnergy(100*TeV);  //default
  emOptions.SetDEDXBinning(12*20);  //default=12*7
  emOptions.SetLambdaBinning(12*20);   //default=12*7
  emOptions.SetSplineFlag(true); //default

  //multiple coulomb scattering
  //
  emOptions.SetMscStepLimitation(fUseDistanceToBoundary);  //default=fUseSafety
  emOptions.SetMscRangeFactor(0.04);   //default
  emOptions.SetMscGeomFactor (2.5); //default
  emOptions.SetSkin(3.);      //default

  //energy loss
  //
  emOptions.SetStepFunction(0.2, 100*um); //default=(0.2, 1*mm)
  emOptions.SetLinearLossLimit(1.e-2);    //default

  //ionization
  //
  emOptions.SetSubCutoff(false); //default
}

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