source: trunk/source/processes/electromagnetic/standard/src/G4ionIonisation.cc @ 846

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// $Id: G4ionIonisation.cc,v 1.45.2.2 2008/04/25 00:34:55 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4ionIonisation
//
// Author:        Vladimir Ivanchenko
//
// Creation date: 07.05.2002
//
// Modifications:
//
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
// 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
// 18-04-03 Use IonFluctuations (V.Ivanchenko)
// 03-08-03 Add effective charge (V.Ivanchenko)
// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
// 27-05-04 Set integral to be a default regime (V.Ivanchenko)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
// 10-05-06 Add a possibility to download user data (V.Ivantchenko)
// 13-05-06 Add data for light ion stopping in water (V.Ivantchenko)
// 14-01-07 use SetEmModel() and SetFluctModel() from G4VEnergyLossProcess (mma)
// 16-05-07 Add data for light ion stopping only for GenericIon (V.Ivantchenko)
// 07-11-07 Fill non-ionizing energy loss (V.Ivantchenko)
//
//
// -------------------------------------------------------------------
//
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#include "G4ionIonisation.hh"
#include "G4Electron.hh"
#include "G4Proton.hh"
#include "G4GenericIon.hh"
#include "G4BraggModel.hh"
#include "G4BraggIonModel.hh"
#include "G4BetheBlochModel.hh"
#include "G4IonFluctuations.hh"
#include "G4UnitsTable.hh"
#include "G4LossTableManager.hh"
#include "G4WaterStopping.hh"

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using namespace std;

G4ionIonisation::G4ionIonisation(const G4String& name)
  : G4VEnergyLossProcess(name),
    theParticle(0),
    theBaseParticle(0),
    isInitialised(false),
    stopDataActive(true),
    nuclearStopping(true)
{
  SetLinearLossLimit(0.15);
  SetStepFunction(0.1, 0.1*mm);
  SetIntegral(true);
  SetVerboseLevel(1);
  corr = G4LossTableManager::Instance()->EmCorrections();
}

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G4ionIonisation::~G4ionIonisation()
{}

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void G4ionIonisation::InitialiseEnergyLossProcess(
                      const G4ParticleDefinition* part,
                      const G4ParticleDefinition* bpart)
{
  if(isInitialised) return;

  theParticle = part;

  if(part == bpart || part == G4GenericIon::GenericIon()) theBaseParticle = 0;
  else if(bpart == 0) theBaseParticle = G4GenericIon::GenericIon();
  else                theBaseParticle = bpart;

  SetBaseParticle(theBaseParticle);
  SetSecondaryParticle(G4Electron::Electron());

  if(theBaseParticle) baseMass = theBaseParticle->GetPDGMass();
  else                baseMass = theParticle->GetPDGMass();
  
  if (!EmModel(1)) SetEmModel(new G4BraggIonModel(),1);
  EmModel(1)->SetLowEnergyLimit(100*eV);
  eth = 2.0*MeV;  
  EmModel(1)->SetHighEnergyLimit(eth);
  if (!FluctModel()) SetFluctModel(new G4IonFluctuations());
  AddEmModel(1, EmModel(1), FluctModel());

  if (!EmModel(2)) SetEmModel(new G4BetheBlochModel(),2);  
  EmModel(2)->SetLowEnergyLimit(eth);
  EmModel(2)->SetHighEnergyLimit(100*TeV);
  AddEmModel(2, EmModel(2), FluctModel());    

  // Add ion stoping tables for Generic Ion
  if(part == G4GenericIon::GenericIon()) {
    G4WaterStopping  ws(corr);
    effCharge = corr->GetIonEffectiveCharge(EmModel(1));
  } else {
    effCharge = corr->GetIonEffectiveCharge(0);
  }

  isInitialised = true;
}

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void G4ionIonisation::PrintInfo()
{
  if(EmModel(1) && EmModel(2))
    G4cout << "      Scaling relation is used from proton dE/dx and range."
           << "\n      Delta cross sections and sampling from " 
           << EmModel(2)->GetName() << " model for scaled energy > "
           << eth/MeV << " MeV"
           << "\n      Parametrisation from "
           << EmModel(1)->GetName() << " for protons below."
           << " NuclearStopping= " << nuclearStopping
           << G4endl;    
  if (stopDataActive)
    G4cout << "\n      Stopping Power data for " 
           << corr->GetNumberOfStoppingVectors()
           << " ion/material pairs are used."
           << G4endl;
}

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void G4ionIonisation::AddStoppingData(G4int Z, G4int A,
                                      const G4String& mname,
                                      G4PhysicsVector& dVector)
{
  corr->AddStoppingData(Z, A, mname, dVector);
}

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void G4ionIonisation::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
                                           const G4DynamicParticle* dp,
                                           G4double& eloss,
                                           G4double& s)
{
  const G4ParticleDefinition* part = dp->GetDefinition();
  const G4Material* mat = couple->GetMaterial();
  if(eloss < preKinEnergy) {
    //    G4cout << "e= " << preKinEnergy << " ratio= " << massRatio << " eth= " << eth<<  G4endl;
    if(preKinEnergy*massRatio > eth)
      eloss += s*corr->HighOrderCorrections(part,mat,preKinEnergy);
    else {

      if(stopDataActive)
        eloss *= corr->EffectiveChargeCorrection(part,mat,preKinEnergy);

    }
    fParticleChange.SetProposedCharge(effCharge->EffectiveCharge(part,
                                      mat,preKinEnergy-eloss));
  }
  if(nuclearStopping && preKinEnergy*massRatio < 50.*eth*charge2) {
    G4double nloss = s*corr->NuclearDEDX(part,mat,preKinEnergy - eloss*0.5);
    eloss += nloss;
    //  G4cout << "G4ionIonisation::CorrectionsAlongStep: e= " << preKinEnergy
    //     << " de= " << eloss << " NIEL= " << nloss << G4endl;
    fParticleChange.ProposeNonIonizingEnergyDeposit(nloss);
  }
}

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