source: trunk/source/processes/electromagnetic/standard/src/G4hIonisation.cc @ 846

Last change on this file since 846 was 819, checked in by garnier, 16 years ago

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25//
26// $Id: G4hIonisation.cc,v 1.70 2008/01/14 11:59:45 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-01-patch-02 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class file
32//
33//
34// File name:     G4hIonisation
35//
36// Author:        Laszlo Urban
37//
38// Creation date: 30.05.1997
39//
40// Modifications:
41//
42// corrected by L.Urban on 24/09/97
43// several bugs corrected by L.Urban on 13/01/98
44// 07-04-98 remove 'tracking cut' of the ionizing particle, mma
45// 22-10-98 cleanup L.Urban
46// 02-02-99 bugs fixed , L.Urban
47// 29-07-99 correction in BuildLossTable for low energy, L.Urban
48// 10-02-00 modifications , new e.m. structure, L.Urban
49// 10-08-00 V.Ivanchenko change BuildLambdaTable, in order to
50//          simulate energy losses of ions; correction to
51//          cross section for particles with spin 1 is inserted as well
52// 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
53// 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
54// 14-08-01 new function ComputeRestrictedMeandEdx() + 'cleanup' (mma)
55// 29-08-01 PostStepDoIt: correction for spin 1/2 (instead of 1) (mma)
56// 17-09-01 migration of Materials to pure STL (mma)
57// 25-09-01 completion of RetrievePhysicsTable() (mma)
58// 29-10-01 all static functions no more inlined
59// 08-11-01 Charge renamed zparticle; added to the dedx
60// 27-03-02 Bug fix in scaling of lambda table (V.Ivanchenko)
61// 09-04-02 Update calculation of tables for GenericIons (V.Ivanchenko)
62// 30-04-02 V.Ivanchenko update to new design
63// 04-12-02 Add verbose level definition (VI)
64// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
65// 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
66// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
67// 23-05-03 Define default integral + BohrFluctuations (V.Ivanchenko)
68// 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko)
69// 04-08-03 Set integral=false to be default (V.Ivanchenko)
70// 08-08-03 STD substitute standard  (V.Ivanchenko)
71// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
72// 27-05-04 Set integral to be a default regime (V.Ivanchenko)
73// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
74// 24-03-05 Optimize internal interfaces (V.Ivantchenko)
75// 12-08-05 SetStepLimits(0.2, 0.1*mm) (mma)
76// 10-01-06 SetStepLimits -> SetStepFunction (V.Ivanchenko)
77// 26-05-06 scale negative particles from pi- and pbar,
78//          positive from pi+ and p (VI)
79// 14-01-07 use SetEmModel() and SetFluctModel() from G4VEnergyLossProcess (mma)
80//
81// -------------------------------------------------------------------
82//
83//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
84//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
85
86#include "G4hIonisation.hh"
87#include "G4Electron.hh"
88#include "G4Proton.hh"
89#include "G4AntiProton.hh"
90#include "G4BraggModel.hh"
91#include "G4BetheBlochModel.hh"
92#include "G4UniversalFluctuation.hh"
93#include "G4BohrFluctuations.hh"
94#include "G4UnitsTable.hh"
95#include "G4PionPlus.hh"
96#include "G4PionMinus.hh"
97#include "G4LossTableManager.hh"
98
99//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
100
101using namespace std;
102
103G4hIonisation::G4hIonisation(const G4String& name)
104  : G4VEnergyLossProcess(name),
105    theParticle(0),
106    theBaseParticle(0),
107    isInitialised(false)
108{
109  SetStepFunction(0.2, 1*mm);
110  SetIntegral(true);
111  SetVerboseLevel(1);
112  mass = 0.0;
113  ratio = 0.0;
114  corr = G4LossTableManager::Instance()->EmCorrections(); 
115  nuclearStopping = true;
116}
117
118//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
119
120G4hIonisation::~G4hIonisation()
121{}
122
123//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 
124
125void G4hIonisation::InitialiseEnergyLossProcess(
126                    const G4ParticleDefinition* part,
127                    const G4ParticleDefinition* bpart)
128{
129  if(isInitialised) return;
130
131  theParticle = part;
132
133  G4String pname = part->GetParticleName();
134
135  // standard base particles
136  if(part == bpart || pname == "proton" ||
137     pname == "anti_proton" || pname == "pi+" || pname == "pi-" ) 
138    theBaseParticle = 0;
139
140  // select base particle
141  else if(bpart == 0) {
142
143    if(pname == "kaon+")      theBaseParticle = G4PionPlus::PionPlus();
144    else if(pname == "kaon-") theBaseParticle = G4PionMinus::PionMinus();
145    else if(part->GetPDGCharge() > 0.0) theBaseParticle = G4Proton::Proton();
146    else theBaseParticle = G4AntiProton::AntiProton();
147
148  } else theBaseParticle = bpart;
149
150  SetBaseParticle(theBaseParticle);
151  SetSecondaryParticle(G4Electron::Electron());
152  mass  = theParticle->GetPDGMass();
153  ratio = electron_mass_c2/mass;
154  massratio = 1.0;
155  if(theBaseParticle) massratio = theBaseParticle->GetPDGMass()/mass; 
156
157  if (!EmModel(1)) SetEmModel(new G4BraggModel(),1);
158  EmModel(1)->SetLowEnergyLimit(100*eV);
159  eth = 2.0*MeV*mass/proton_mass_c2;
160  ethnuc = eth*50.0;
161  EmModel(1)->SetHighEnergyLimit(eth);
162  if (!FluctModel()) SetFluctModel(new G4UniversalFluctuation());
163  AddEmModel(1, EmModel(1), FluctModel());
164
165  if (!EmModel(2)) SetEmModel(new G4BetheBlochModel(),2); 
166  EmModel(2)->SetLowEnergyLimit(eth);
167  EmModel(2)->SetHighEnergyLimit(100*TeV);
168  AddEmModel(2, EmModel(2), FluctModel()); 
169
170  isInitialised = true;
171}
172
173//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
174
175void G4hIonisation::PrintInfo()
176{
177  if(EmModel(1) && EmModel(2))
178    G4cout << "      Scaling relation is used from proton dE/dx and range."
179           << "\n      Delta cross sections and sampling from " 
180           << EmModel(2)->GetName() << " model for scaled energy > "
181           << eth/MeV << " MeV"
182           << "\n      Parametrisation from "
183           << EmModel(1)->GetName() << " for protons below."
184           << " NuclearStopping= " << nuclearStopping
185           << G4endl;
186}
187
188//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
189
190void G4hIonisation::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
191                                         const G4DynamicParticle* dp,
192                                         G4double& eloss,
193                                         G4double& s)
194{
195  G4double ekin = dp->GetKineticEnergy();
196  if(nuclearStopping && ekin < ethnuc) {
197    G4double nloss = s*corr->NuclearDEDX(theParticle,couple->GetMaterial(),
198                                         ekin - eloss*0.5);
199    eloss += nloss;
200    //  G4cout << "G4ionIonisation::CorrectionsAlongStep: e= " << preKinEnergy
201    //     << " de= " << eloss << " NIEL= " << nloss << G4endl;
202    fParticleChange.ProposeNonIonizingEnergyDeposit(nloss);
203  }
204}
205
206//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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