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>> 26 // $Id: G4CoulombScattering.cc,v 1.6 2006/08/10 08:43:56 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-08-01-patch-02 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class file 31 // GEANT4 Class file
30 // 32 //
31 // 33 //
32 // File name: G4CoulombScattering 34 // File name: G4CoulombScattering
33 // 35 //
34 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
35 // 37 //
36 // Creation date: 22.08.2004 38 // Creation date: 22.08.2004
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 01.08.06 V.Ivanchenko add choice between G4 41 // 01.08.06 V.Ivanchenko add choice between G4eCoulombScatteringModel and
40 // G4CoulombScatteringModel 42 // G4CoulombScatteringModel
41 // 43 //
42 44
43 // 45 //
44 // ------------------------------------------- 46 // -------------------------------------------------------------------
45 // 47 //
46 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 50
49 #include "G4CoulombScattering.hh" 51 #include "G4CoulombScattering.hh"
50 #include "G4SystemOfUnits.hh" << 52 #include "G4CoulombScatteringModel.hh"
51 #include "G4eCoulombScatteringModel.hh" 53 #include "G4eCoulombScatteringModel.hh"
52 #include "G4IonCoulombScatteringModel.hh" <<
53 #include "G4Proton.hh" <<
54 #include "G4EmParameters.hh" <<
55 54
56 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 56
58 G4CoulombScattering::G4CoulombScattering(const << 57 using namespace std;
59 : G4VEmProcess(nam), << 58
60 q2Max(CLHEP::TeV*CLHEP::TeV), << 59 G4CoulombScattering::G4CoulombScattering(const G4String& name)
61 isCombined(comb) << 60 : G4VEmProcess(name),thetaMin(0.0),thetaMax(pi),q2Max(DBL_MAX),
>> 61 isInitialised(false)
62 { 62 {
63 SetBuildTableFlag(true); << 63 SetLambdaBinning(80);
64 SetStartFromNullFlag(false); << 64 SetMinKinEnergy(1.0*keV);
65 SetSplineFlag(false); << 65 SetMaxKinEnergy(100.0*GeV);
66 SetCrossSectionType(fEmOnePeak); << 66 buildTableFlag = true;
67 SetSecondaryParticle(G4Proton::Proton()); <<
68 SetProcessSubType(fCoulombScattering); <<
69 } 67 }
70 68
71 //....oooOO0OOooo........oooOO0OOooo........oo 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 70
73 G4CoulombScattering::G4CoulombScattering(const << 71 G4CoulombScattering::~G4CoulombScattering()
74 : G4CoulombScattering(nam, true) <<
75 {} <<
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} 72 {}
82 <<
83 //....oooOO0OOooo........oooOO0OOooo........oo <<
84 <<
85 G4CoulombScattering::~G4CoulombScattering() = <<
86 73
87 //....oooOO0OOooo........oooOO0OOooo........oo 74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 75
89 G4bool G4CoulombScattering::IsApplicable(const << 76 void G4CoulombScattering::InitialiseProcess(const G4ParticleDefinition*)
90 { 77 {
91 return (p.GetPDGCharge() != 0.0); << 78 if(!isInitialised) {
92 } << 79 isInitialised = true;
93 << 80 // SetVerboseLevel(3);
94 //....oooOO0OOooo........oooOO0OOooo........oo << 81 // SetBuildTableFlag(buildTableFlag);
95 <<
96 void G4CoulombScattering::InitialiseProcess(co <<
97 { <<
98 // second initialisation not allowed for the <<
99 // this means that polar angle limit change <<
100 // after first initialisation <<
101 if(isInitialised) { return; } <<
102 <<
103 G4EmParameters* param = G4EmParameters::Inst <<
104 G4double a = param->FactorForAngleLimit()*CL <<
105 q2Max = 0.5*a*a; <<
106 G4double theta = param->MscThetaLimit(); <<
107 <<
108 // restricted or non-restricted cross sectio <<
109 if(isCombined) { <<
110 if(theta == CLHEP::pi) { <<
111 // for restriced single scattering chang <<
112 SetCrossSectionType(fEmIncreasing); <<
113 SetStartFromNullFlag(true); <<
114 } <<
115 } else { <<
116 SetSplineFlag(true); <<
117 SetCrossSectionType(fEmDecreasing); <<
118 } <<
119 isInitialised = true; <<
120 G4double mass = p->GetPDGMass(); <<
121 G4String name = p->GetParticleName(); <<
122 <<
123 G4bool ion = false; <<
124 if (mass > CLHEP::GeV || p->GetParticleType( <<
125 SetBuildTableFlag(false); 82 SetBuildTableFlag(false);
126 ion = true; << 83 SetStartFromNullFlag(false);
127 if(name != "GenericIon") { SetVerboseLevel << 84 SetLambdaFactor(0.8);
128 } else { << 85 SetSecondaryParticle(0);
129 if(name != "e-" && name != "e+" && << 86 G4double emin = MinKinEnergy();
130 name != "mu+" && name != "mu-" && name << 87 G4double emax = MaxKinEnergy();
131 name != "kaon+" && name != "proton" ) { << 88 if(GetProcessName() == "eCoulombScat") {
132 } << 89 G4eCoulombScatteringModel* model =
133 /* << 90 new G4eCoulombScatteringModel(thetaMin,thetaMax,buildTableFlag,q2Max);
134 G4cout << "### G4CoulombScattering::Initiali << 91 model->SetLowEnergyLimit(emin);
135 << p->GetParticleName() << 92 model->SetHighEnergyLimit(emax);
136 << " Emin(MeV)= " << MinKinEnergy()/MeV << 93 AddEmModel(1, model);
137 << " Emax(TeV)= " << MaxKinEnergy()/TeV << 94 } else {
138 << " nbins= " << LambdaBinning() << 95 G4CoulombScatteringModel* model =
139 << " theta= " << theta << 96 new G4CoulombScatteringModel(thetaMin,thetaMax,buildTableFlag,q2Max);
140 << " mass(MeV)= " << mass << 97 model->SetLowEnergyLimit(emin);
141 << " isCombined=" << isCombined << 98 model->SetHighEnergyLimit(emax);
142 << " ion=" << ion << 99 AddEmModel(1, model);
143 << G4endl; << 100 }
144 */ <<
145 if(nullptr == EmModel(0)) { <<
146 if(ion) { SetEmModel(new G4IonCoulombScatt <<
147 else { SetEmModel(new G4eCoulombScattering <<
148 } <<
149 G4VEmModel* model = EmModel(0); <<
150 G4double emin = std::max(param->MinKinEnergy <<
151 G4double emax = std::min(param->MaxKinEnergy <<
152 model->SetPolarAngleLimit(theta); <<
153 model->SetLowEnergyLimit(emin); <<
154 model->SetHighEnergyLimit(emax); <<
155 AddEmModel(1, model); <<
156 } <<
157 <<
158 //....oooOO0OOooo........oooOO0OOooo........oo <<
159 <<
160 G4double G4CoulombScattering::MinPrimaryEnergy <<
161 const G4Material* mat) <<
162 { <<
163 // Pure Coulomb scattering <<
164 G4double emin = 0.0; <<
165 <<
166 // Coulomb scattering combined with multiple <<
167 G4double theta = G4EmParameters::Instance()- <<
168 <<
169 if(0.0 < theta) { <<
170 G4double p2 = q2Max*mat->GetIonisation()-> <<
171 G4double mass = part->GetPDGMass(); <<
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas <<
173 } 101 }
174 <<
175 return emin; <<
176 } 102 }
177 103
178 //....oooOO0OOooo........oooOO0OOooo........oo 104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 105
180 void G4CoulombScattering::StreamProcessInfo(st << 106 void G4CoulombScattering::PrintInfo()
181 { 107 {
182 G4double tetmin = G4EmParameters::Instance() << 108 G4cout << " Coulomb scattering with ThetaMin(degree)= " << thetaMin/degree
183 outFile << " "; << 109 << "; ThetaMax(degree)= " << thetaMax/degree
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" << 110 << "; q2Max(GeV^2)= " << q2Max/(GeV*GeV)
185 else { outFile << tetmin; } << 111 << G4endl;
186 outFile << " < Theta(degree) < 180"; <<
187 <<
188 if(q2Max < DBL_MAX) { <<
189 outFile << ", pLimit(GeV^1)= " << std::sqr <<
190 } <<
191 outFile << G4endl; <<
192 } 112 }
193 113
194 //....oooOO0OOooo........oooOO0OOooo........oo 114 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
195 <<
196 void G4CoulombScattering::ProcessDescription(s <<
197 { <<
198 out << <<
199 " Coulomb scattering. Simulation of elastic <<
200 " events individually. May be used in com <<
201 " scattering, where Coulomb scattering is <<
202 " collisions and multiple scattering for <<
203 G4VEmProcess::ProcessDescription(out); <<
204 } <<
205 <<
206 //....oooOO0OOooo........oooOO0OOooo........oo <<
207 115