G4EmStandardPhysics.cc

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//
//---------------------------------------------------------------------------
//
// ClassName:   G4EmStandardPhysics
//
// Author:      V.Ivanchenko 09.11.2005
//
// Modified:
//
//----------------------------------------------------------------------------
//
 
#include "G4EmStandardPhysics.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleDefinition.hh"
#include "G4EmParameters.hh"
#include "G4EmBuilder.hh"
#include "G4LossTableManager.hh"
 
#include "G4ComptonScattering.hh"
#include "G4KleinNishinaModel.hh"
#include "G4GammaConversion.hh"
#include "G4PhotoElectricEffect.hh"
#include "G4RayleighScattering.hh"
#include "G4LivermorePhotoElectricModel.hh"
#include "G4LivermorePolarizedRayleighModel.hh"
#include "G4PhotoElectricAngularGeneratorPolarized.hh"
 
#include "G4eMultipleScattering.hh"
#include "G4hMultipleScattering.hh"
#include "G4CoulombScattering.hh"
#include "G4eCoulombScatteringModel.hh"
#include "G4WentzelVIModel.hh"
#include "G4UrbanMscModel.hh"
 
#include "G4eIonisation.hh"
#include "G4eBremsstrahlung.hh"
#include "G4eplusAnnihilation.hh"
 
#include "G4hIonisation.hh"
#include "G4ionIonisation.hh"
#include "G4NuclearStopping.hh"
 
#include "G4Gamma.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4GenericIon.hh"
 
#include "G4PhysicsListHelper.hh"
#include "G4BuilderType.hh"
#include "G4EmModelActivator.hh"
#include "G4GammaGeneralProcess.hh"
 
// factory
#include "G4PhysicsConstructorFactory.hh"
//
G4_DECLARE_PHYSCONSTR_FACTORY(G4EmStandardPhysics);
 
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G4EmStandardPhysics::G4EmStandardPhysics(G4int ver, const G4String&)
  : G4VPhysicsConstructor("G4EmStandard")
{
  SetVerboseLevel(ver);
  G4EmParameters* param = G4EmParameters::Instance();
  param->SetDefaults();
  param->SetVerbose(ver);
  SetPhysicsType(bElectromagnetic);
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
G4EmStandardPhysics::~G4EmStandardPhysics()
{}
 
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void G4EmStandardPhysics::ConstructParticle()
{
  // minimal set of particles for EM physics
  G4EmBuilder::ConstructMinimalEmSet();
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
void G4EmStandardPhysics::ConstructProcess()
{
  if(verboseLevel > 1) {
    G4cout << "### " << GetPhysicsName() << " Construct Processes " << G4endl;
  }
  G4EmBuilder::PrepareEMPhysics();
 
  G4PhysicsListHelper* ph = G4PhysicsListHelper::GetPhysicsListHelper();
  G4EmParameters* param = G4EmParameters::Instance();
 
  // processes used by several particles
  G4hMultipleScattering* hmsc = new G4hMultipleScattering("ionmsc");
 
  // nuclear stopping is enabled if th eenergy limit above zero
  G4double nielEnergyLimit = param->MaxNIELEnergy();
  G4NuclearStopping* pnuc = nullptr;
  if(nielEnergyLimit > 0.0) {
    pnuc = new G4NuclearStopping();
    pnuc->SetMaxKinEnergy(nielEnergyLimit);
  }
 
  // high energy limit for e+- scattering models and bremsstrahlung
  G4double highEnergyLimit = param->MscEnergyLimit();
 
  // Add gamma EM Processes
  G4ParticleDefinition* particle = G4Gamma::Gamma();
  G4bool polar = param->EnablePolarisation();
 
  // Photoelectric
  G4PhotoElectricEffect* pe = new G4PhotoElectricEffect();
  G4VEmModel* peModel = new G4LivermorePhotoElectricModel();
  pe->SetEmModel(peModel);
  if(polar) {
    peModel->SetAngularDistribution(new G4PhotoElectricAngularGeneratorPolarized());
  }
 
  // Compton scattering
  G4ComptonScattering* cs = new G4ComptonScattering;
  if(polar) {
    cs->SetEmModel(new G4KleinNishinaModel());
  }
 
  // default Rayleigh scattering is Livermore
  G4RayleighScattering* rl = new G4RayleighScattering();
  if(polar) {
    rl->SetEmModel(new G4LivermorePolarizedRayleighModel());
  }
 
  if(G4EmParameters::Instance()->GeneralProcessActive()) {
    G4GammaGeneralProcess* sp = new G4GammaGeneralProcess();
    sp->AddEmProcess(pe);
    sp->AddEmProcess(cs);
    sp->AddEmProcess(new G4GammaConversion());
    sp->AddEmProcess(rl);
    G4LossTableManager::Instance()->SetGammaGeneralProcess(sp);
    ph->RegisterProcess(sp, particle);
 
  } else {
    ph->RegisterProcess(pe, particle);
    ph->RegisterProcess(cs, particle);
    ph->RegisterProcess(new G4GammaConversion(), particle);
    ph->RegisterProcess(rl, particle);
  }
 
  // e-
  particle = G4Electron::Electron();
 
  G4eMultipleScattering* msc = new G4eMultipleScattering;
  G4UrbanMscModel* msc1 = new G4UrbanMscModel();
  G4WentzelVIModel* msc2 = new G4WentzelVIModel();
  msc1->SetHighEnergyLimit(highEnergyLimit);
  msc2->SetLowEnergyLimit(highEnergyLimit);
  msc->SetEmModel(msc1);
  msc->SetEmModel(msc2);
 
  G4eCoulombScatteringModel* ssm = new G4eCoulombScatteringModel(); 
  G4CoulombScattering* ss = new G4CoulombScattering();
  ss->SetEmModel(ssm); 
  ss->SetMinKinEnergy(highEnergyLimit);
  ssm->SetLowEnergyLimit(highEnergyLimit);
  ssm->SetActivationLowEnergyLimit(highEnergyLimit);
 
  ph->RegisterProcess(msc, particle);
  ph->RegisterProcess(new G4eIonisation(), particle);
  ph->RegisterProcess(new G4eBremsstrahlung(), particle);
  ph->RegisterProcess(ss, particle);
 
  // e+
  particle = G4Positron::Positron();
 
  msc = new G4eMultipleScattering;
  msc1 = new G4UrbanMscModel();
  msc2 = new G4WentzelVIModel();
  msc1->SetHighEnergyLimit(highEnergyLimit);
  msc2->SetLowEnergyLimit(highEnergyLimit);
  msc->SetEmModel(msc1);
  msc->SetEmModel(msc2);
 
  ssm = new G4eCoulombScatteringModel(); 
  ss = new G4CoulombScattering();
  ss->SetEmModel(ssm); 
  ss->SetMinKinEnergy(highEnergyLimit);
  ssm->SetLowEnergyLimit(highEnergyLimit);
  ssm->SetActivationLowEnergyLimit(highEnergyLimit);
 
  ph->RegisterProcess(msc, particle);
  ph->RegisterProcess(new G4eIonisation(), particle);
  ph->RegisterProcess(new G4eBremsstrahlung(), particle);
  ph->RegisterProcess(new G4eplusAnnihilation(), particle);
  ph->RegisterProcess(ss, particle);
 
  // generic ion
  particle = G4GenericIon::GenericIon();
  G4ionIonisation* ionIoni = new G4ionIonisation();
  ph->RegisterProcess(hmsc, particle);
  ph->RegisterProcess(ionIoni, particle);
  if(nullptr != pnuc) { ph->RegisterProcess(pnuc, particle); }
 
  // muons, hadrons ions
  G4EmBuilder::ConstructCharged(hmsc, pnuc);
 
  // extra configuration
  G4EmModelActivator mact(GetPhysicsName());
}
 
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