G4INCLInteractionAvatar.hh

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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

/* \file G4INCLInteractionAvatar.hh
 * \brief Virtual class for interaction avatars.
 *
 * This class is inherited by decay and collision avatars. The goal is to
 * provide a uniform treatment of common physics, such as Pauli blocking,
 * enforcement of energy conservation, etc.
 *
 *  \date Mar 1st, 2011
 * \author Davide Mancusi
 */

#ifndef G4INCLINTERACTIONAVATAR_HH_
#define G4INCLINTERACTIONAVATAR_HH_

#include "G4INCLIAvatar.hh"
#include "G4INCLNucleus.hh"
#include "G4INCLFinalState.hh"
#include "G4INCLRootFinder.hh"
#include "G4INCLKinematicsUtils.hh"

namespace G4INCL {

  class InteractionAvatar : public G4INCL::IAvatar {
    public:
      InteractionAvatar(G4double, G4INCL::Nucleus*, G4INCL::Particle*);
      InteractionAvatar(G4double, G4INCL::Nucleus*, G4INCL::Particle*, G4INCL::Particle*);
      virtual ~InteractionAvatar();

      static const G4double locEAccuracy;
      static const G4int maxIterLocE;

      static void deleteBackupParticles();

    protected:
      virtual G4INCL::IChannel* getChannel() = 0;

      G4bool bringParticleInside(Particle * const p);

      void preInteractionLocalEnergy(Particle * const p);

      void preInteractionBlocking();

      void preInteraction();
      FinalState *postInteraction(FinalState *);

      void restoreParticles() const;

      G4bool shouldUseLocalEnergy() const {
        if(!theNucleus) return false;
        LocalEnergyType theLocalEnergyType;
        if(getType()==DecayAvatarType || isPiN)
          theLocalEnergyType = theNucleus->getStore()->getConfig()->getLocalEnergyPiType();
        else
          theLocalEnergyType = theNucleus->getStore()->getConfig()->getLocalEnergyBBType();

        const G4bool firstAvatar = (theNucleus->getStore()->getBook().getAcceptedCollisions() == 0);
        return ((theLocalEnergyType == FirstCollisionLocalEnergy && firstAvatar) ||
            theLocalEnergyType == AlwaysLocalEnergy);
      }

      Nucleus *theNucleus;
      Particle *particle1, *particle2;
      static G4ThreadLocal Particle *backupParticle1, *backupParticle2;
      ThreeVector boostVector;
      G4double oldTotalEnergy, oldXSec;
      G4bool isPiN;

    private:
      class ViolationEMomentumFunctor : public RootFunctor {
        public:
          ViolationEMomentumFunctor(Nucleus * const nucleus, FinalState const * const finalState, ThreeVector const * const boost, const G4bool localE);
          virtual ~ViolationEMomentumFunctor() { particleMomenta.clear(); }

          G4double operator()(const G4double x) const;

          void cleanUp(const G4bool success) const;

        private:
          ParticleList finalParticles;
          std::list<ThreeVector> particleMomenta;
          G4double initialEnergy;
          Nucleus *theNucleus;
          ThreeVector const *boostVector;

          const G4bool shouldUseLocalEnergy;

          void scaleParticleMomenta(const G4double alpha) const;

      };

      class ViolationEEnergyFunctor : public RootFunctor {
        public:
          ViolationEEnergyFunctor(Nucleus * const nucleus, FinalState const * const finalState, const G4bool localE);
          virtual ~ViolationEEnergyFunctor() {}

          G4double operator()(const G4double x) const;

          void cleanUp(const G4bool success) const;

          void setParticleEnergy(const G4double energy) const;

        private:
          G4double initialEnergy;
          Nucleus *theNucleus;
          Particle *theParticle;
          G4double theEnergy;
          ThreeVector theMomentum;
          G4double energyThreshold;
          const G4bool shouldUseLocalEnergy;
      };

      RootFunctor *violationEFunctor;

    protected:
      G4bool enforceEnergyConservation(FinalState * const fs);

  };

}

#endif /* G4INCLINTERACTIONAVATAR_HH_ */