ExUCNExtraPhysics.cc

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#include "G4ParticleDefinition.hh"
#include "G4ProcessManager.hh"

#include "G4Transportation.hh"

#include "G4Decay.hh"
#include "G4DecayTable.hh"
#include "G4NeutronBetaDecayChannel.hh"

#include "G4UserSpecialCuts.hh"
#include "G4StepLimiter.hh"
#include "G4SystemOfUnits.hh"

#include "G4UCNLoss.hh"
#include "G4UCNAbsorption.hh"
#include "G4UCNMultiScattering.hh"
#include "G4UCNBoundaryProcess.hh"

#include "ExUCNExtraPhysics.hh"

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ExUCNExtraPhysics::ExUCNExtraPhysics() 
    : G4VPhysicsConstructor("Extra") {;}

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ExUCNExtraPhysics::~ExUCNExtraPhysics() {;}

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void ExUCNExtraPhysics::ConstructParticle() {;}

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void ExUCNExtraPhysics::ConstructProcess()
{
    auto particleIterator=GetParticleIterator();
    particleIterator->reset();

    while ((*particleIterator)()) {
        G4ParticleDefinition* particle = particleIterator->value();
        G4ProcessManager* pmanager = particle->GetProcessManager();
        G4String particleName = particle->GetParticleName();

        if (!pmanager) {
            std::ostringstream o;
            o << "Particle " << particleName << "without a Process Manager";
            G4Exception("ExUCNExtraPhysics::ConstructProcess()","",
                         FatalException,o.str().c_str());
        }

        pmanager->AddDiscreteProcess(new G4StepLimiter());
        pmanager->AddDiscreteProcess(new G4UserSpecialCuts());
    }

    ConstructUCN();

    // G4Transportation::EnableMagneticMoment();
    G4Transportation::EnableGravity();
}

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void ExUCNExtraPhysics::ConstructUCN()
{
    auto particleIterator=GetParticleIterator();
    particleIterator->reset();
    G4ProcessManager* pmanager = NULL;

    while ((*particleIterator)()) {
        G4ParticleDefinition* particle = particleIterator->value();
        pmanager = particle->GetProcessManager();
        G4String particleName = particle->GetParticleName();

        if (!pmanager) {
           std::ostringstream o;
           o << "Particle " << particleName << "without a Process Manager";
           G4Exception("ExUCNExtraPhysics::ConstructProcess()","",
                       FatalException,o.str().c_str());
        }

        if (particleName == "neutron") {
           pmanager->AddDiscreteProcess(new G4UCNLoss());
           pmanager->AddDiscreteProcess(new G4UCNAbsorption());
           pmanager->AddDiscreteProcess(new G4UCNMultiScattering());

           G4UCNBoundaryProcess* ucnBoundaryProcess = 
                                                   new G4UCNBoundaryProcess();
           ucnBoundaryProcess->SetMicroRoughness(true);
           ucnBoundaryProcess->SetVerboseLevel(0);

           pmanager->AddDiscreteProcess(ucnBoundaryProcess);
        }
    }
}

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