BDSPhysicsMilli.cc

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) Royal Holloway, 
University of London 2001 - 2024.
 
This file is part of BDSIM.
 
BDSIM is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published 
by the Free Software Foundation version 3 of the License.
 
BDSIM is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with BDSIM.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "BDSDebug.hh"
#include "BDSGlobalConstants.hh"
#include "BDSParticleMilli.hh"
#include "BDSPhysicsMilli.hh"
 
#include "G4SystemOfUnits.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4LossTableManager.hh"
#include "G4EmParameters.hh"
#include "G4PhysicsListHelper.hh"
#include "G4Version.hh"
#include "G4BuilderType.hh"
 
//#include "G4CoulombScattering.hh"
#include "G4hMultipleScattering.hh"
#include "G4WentzelVIModel.hh"
#include "G4ProcessManager.hh"
#include "G4StepLimiter.hh"
 
BDSPhysicsMilli::BDSPhysicsMilli(const G4String&, G4int ver): G4VPhysicsConstructor("G4millicharged"), verbose(ver)
{
    G4EmParameters* param = G4EmParameters::Instance();
    param->SetDefaults();
    param->SetVerbose(verbose);
    param->SetMinEnergy(100*eV);
    param->SetMaxEnergy(10*TeV);
    //param->SetLowestElectronEnergy(10*eV);
    //param->SetNumberOfBinsPerDecade(20);
    //param->ActivateAngularGeneratorForIonisation(true);
    //param->SetMscThetaLimit(0.0);
    //param->SetFluo(true);
    //param->SetAuger(true);
    //param->SetPixe(true);
    SetPhysicsType(bElectromagnetic);
}
 
BDSPhysicsMilli::~BDSPhysicsMilli()
{;}
 
void BDSPhysicsMilli::ConstructParticle()
{
    ParticleMilli::MillichargeDefinition();
}
 
void BDSPhysicsMilli::ConstructProcess()
{
    //G4CoulombScattering* hCoul = nullptr;
    //hCoul = new G4CoulombScattering();
 
    G4hMultipleScattering* hMpl = nullptr;
    hMpl = new G4hMultipleScattering();
    G4WentzelVIModel* modelmpl = nullptr;
    modelmpl = new G4WentzelVIModel();
    modelmpl->SetActivationLowEnergyLimit(1.*MeV);
    hMpl->SetEmModel(modelmpl, 1);
 
    G4PhysicsListHelper* ph = G4PhysicsListHelper::GetPhysicsListHelper();
 
#if G4VERSION_NUMBER > 1029
    auto aParticleIterator = GetParticleIterator();
#endif
    aParticleIterator->reset();
 
    while( (*aParticleIterator)() )
    {
        G4ParticleDefinition* particle = aParticleIterator->value();
        G4String particleName = particle->GetParticleName();
 
        if(particleName == BDSGlobalConstants::Instance()->millichargeName())
        {
            //ph->RegisterProcess(hCoul, particle);
            ph->RegisterProcess(hMpl, particle);
            ph->RegisterProcess(new G4StepLimiter(), particle);
            continue;
        }
    }
}