source: trunk/source/processes/electromagnetic/standard/src/G4eBremsstrahlung.cc @ 825

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// $Id: G4eBremsstrahlung.cc,v 1.48 2007/05/23 08:47:34 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4eBremsstrahlung
//
// Author:        Michel Maire
//
// Creation date: 26.06.1996
//
// Modifications:
//
// 26-09-96 extension of the total crosssection above 100 GeV, M.Maire
//  1-10-96 new type G4OrderedTable; ComputePartialSumSigma(), M.Maire
// 16-10-96 DoIt() call to the non static GetEnergyCuts(), L.Urban
// 13-12-96 Sign corrected in grejmax and greject
//          error definition of screenvar, L.Urban
// 20-03-97 new energy loss+ionisation+brems scheme, L.Urban
// 07-04-98 remove 'tracking cut' of the diffracted particle, MMa
// 13-08-98 new methods SetBining() PrintInfo()
// 03-03-99 Bug fixed in LPM effect, L.Urban
// 10-02-00 modifications , new e.m. structure, L.Urban
// 07-08-00 new cross section/en.loss parametrisation, LPM flag , L.Urban
// 21-09-00 corrections in the LPM implementation, L.Urban
// 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
// 09-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 17-09-01 migration of Materials to pure STL (mma)
// 21-09-01 completion of RetrievePhysicsTable() (mma)
// 29-10-01 all static functions no more inlined (mma)
// 08-11-01 particleMass becomes a local variable
// 30-04-02 V.Ivanchenko update to new design
// 23-12-02 Change interface in order to move to cut per region (VI)
// 26-12-02 Secondary production moved to derived classes (VI)
// 23-05-03 Define default integral + BohrFluctuations (V.Ivanchenko)
// 08-08-03 STD substitute standard  (V.Ivanchenko)
// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
// 04-11-04 add gamma threshold (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)
// 22-05-06 Use gammaThreshold from manager (V.Ivantchenko)
// 15-01-07 use SetEmModel() from G4VEnergyLossProcess (mma)
//
// -------------------------------------------------------------------
//
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#include "G4eBremsstrahlung.hh"
#include "G4Gamma.hh"
#include "G4eBremsstrahlungModel.hh"
#include "G4UniversalFluctuation.hh"
#include "G4UnitsTable.hh"
#include "G4LossTableManager.hh"

#include "G4ProductionCutsTable.hh"
#include "G4MaterialCutsCouple.hh"

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using namespace std;
 
G4eBremsstrahlung::G4eBremsstrahlung(const G4String& name):
  G4VEnergyLossProcess(name), 
  isInitialised(false)
{}

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G4eBremsstrahlung::~G4eBremsstrahlung()
{}

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void G4eBremsstrahlung::InitialiseEnergyLossProcess(
                                                const G4ParticleDefinition* p,
                                                const G4ParticleDefinition*)
{
  if(!isInitialised) {
    particle = p;
    SetSecondaryParticle(G4Gamma::Gamma());
    SetIonisation(false);
    if (!EmModel()) SetEmModel(new G4eBremsstrahlungModel());
    EmModel()->SetLowEnergyLimit (100*eV);
    EmModel()->SetHighEnergyLimit(100*TeV);
    if (!FluctModel()) SetFluctModel(new G4UniversalFluctuation());
                
    AddEmModel(1, EmModel(), FluctModel());
    isInitialised = true;
  }
  G4LossTableManager* man = G4LossTableManager::Instance(); 
  dynamic_cast<G4eBremsstrahlungModel*>(EmModel())
    ->SetEnergyThreshold(man->BremsstrahlungTh());
  dynamic_cast<G4eBremsstrahlungModel*>(EmModel())
    ->SetLPMflag(man->LPMFlag());
}

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void G4eBremsstrahlung::PrintInfo()
{
  if(EmModel()) {
    G4cout << "      Total cross sections and sampling from "
           << EmModel()->GetName() << " model"  
           << " (based on the EEDL data library) " 
           << "\n      Good description from 1 KeV to 100 GeV, "
           << "log scale extrapolation above 100 GeV."
           << " LPM flag " 
           << dynamic_cast<G4eBremsstrahlungModel*>(EmModel())->LPMflag()
           << G4endl;
    G4double eth = dynamic_cast<G4eBremsstrahlungModel*>(EmModel())->EnergyThreshold(); 
    if(eth < DBL_MIN)
      G4cout << "      HighEnergyThreshold(GeV)= " << eth/GeV 
             << G4endl;
  }
}

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