Import Geant4 9.1.0 source tree

2016-06-09 15:37:50 +02:00
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+// $Id: G4ionGasIonisation.cc,v 1.3 2007/11/09 11:45:45 vnivanch Exp $
+// GEANT4 tag $Name: geant4-09-01 $
+//
+// -------------------------------------------------------------------
+//
+// GEANT4 Class file
+//
+//
+// File name:     G4ionGasIonisation
+//
+// Author:        Vladimir Ivanchenko
+//
+// Creation date: 23.07.2007
+//
+// Modifications:
+//
+//
+// -------------------------------------------------------------------
+//
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+#include "G4ionGasIonisation.hh"
+#include "G4Electron.hh"
+#include "G4Proton.hh"
+#include "G4GenericIon.hh"
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+using namespace std;
+
+G4ionGasIonisation::G4ionGasIonisation(const G4String& name)
+  : G4ionIonisation(name),
+    currParticle(0),
+    baseParticle(0),
+    initialised(false)
+{
+  atomXS = CLHEP::pi*CLHEP::Bohr_radius*CLHEP::Bohr_radius;
+  verboseLevel = 1;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+G4ionGasIonisation::~G4ionGasIonisation()
+{}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+void G4ionGasIonisation::InitialiseEnergyLossProcess(
+		      const G4ParticleDefinition* part,
+		      const G4ParticleDefinition* bpart)
+{
+  G4ionIonisation::InitialiseEnergyLossProcess(part, bpart);
+  if(initialised) return;
+
+  currParticle = part;
+
+  if(part == bpart || part == G4GenericIon::GenericIon()) baseParticle = 0;
+  else if(bpart == 0) baseParticle = G4GenericIon::GenericIon();
+  else                baseParticle = bpart;
+
+  if(baseParticle) basePartMass = baseParticle->GetPDGMass();
+  else             basePartMass = currParticle->GetPDGMass();
+  
+  initialised = true;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+void G4ionGasIonisation::PrintInfo()
+{
+  G4ionIonisation::PrintInfo();
+  G4cout << "      Version of ion process with simulation discrete ion/media change exchange."
+	 << G4endl;	 
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+void G4ionGasIonisation::InitialiseMassCharge(const G4Track& track)
+{
+  // First step of an ion
+  if(track.GetCurrentStepNumber() == 1) {
+    currParticle = track.GetDefinition();
+    ionZ = G4int(currParticle->GetPDGCharge()/eplus + 0.5);
+    currentIonZ = G4int(track.GetDynamicParticle()->GetCharge()/eplus + 0.5);
+    currMassRatio = basePartMass/currParticle->GetPDGMass();
+  }
+  // any step 
+  G4double q = eplus*currentIonZ;
+  SetDynamicMassCharge(currMassRatio, q*q);
+  preStepKinEnergy = track.GetKineticEnergy();
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+void G4ionGasIonisation::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
+					      const G4DynamicParticle* dp,
+					      G4double& eloss,
+					      G4double& s)
+{
+  // add corrections
+  if(eloss < preStepKinEnergy) {
+    const G4ParticleDefinition* part = dp->GetDefinition();
+    const G4Material* mat = couple->GetMaterial();
+
+    // use Bethe-Bloch with corrections
+    if(preStepKinEnergy*currMassRatio > BetheBlochEnergyThreshold())
+      eloss += s*corr->HighOrderCorrections(part,mat,preStepKinEnergy);
+
+    // use nuclear stopping 
+    else if(NuclearStoppingFlag()) {
+      G4double nloss = s*corr->NuclearDEDX(part,mat,preStepKinEnergy - eloss*0.5);
+      eloss += nloss;
+      fParticleChange.ProposeNonIonizingEnergyDeposit(nloss);
+    }
+
+    // effective number of collisions
+    G4double x = mat->GetElectronDensity()*s*atomXS;
+    // equilibrium charge
+    G4double q = fParticleChange.GetProposedCharge(); 
+  
+    // sample charge change during the step
+    fParticleChange.SetProposedCharge(SampleChargeAfterStep(q, x));
+  }
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+G4double G4ionGasIonisation::SampleChargeAfterStep(G4double qeff, G4double xeff)
+{
+  // qeff - equilibrium charge
+  // xeff - effective number of collisions
+  // q    - current charge
+  G4double q = eplus*currentIonZ;
+  if(verboseLevel > 1) G4cout << "G4ionGasIonisation: Q1= " << currentIonZ
+			      << " Qeff= " << qeff/eplus << "  Neff= " << xeff
+			      << G4endl;
+  return q;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....