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25 // 25 //
>> 26 // $Id: G4CoulombScattering.cc,v 1.11 2007/11/20 18:43:25 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-01 $
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" << 54 #include "G4Electron.hh"
53 #include "G4Proton.hh" <<
54 #include "G4EmParameters.hh" <<
55 55
56 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 57
58 G4CoulombScattering::G4CoulombScattering(const << 58 using namespace std;
59 : G4VEmProcess(nam), << 59
60 q2Max(CLHEP::TeV*CLHEP::TeV), << 60 G4CoulombScattering::G4CoulombScattering(const G4String& name)
61 isCombined(comb) << 61 : G4VEmProcess(name),thetaMin(0.0),thetaMax(pi),q2Max(DBL_MAX),
>> 62 isInitialised(false)
62 { 63 {
63 SetBuildTableFlag(true); << 64 G4VEmProcess::SetBuildTableFlag(true);
64 SetStartFromNullFlag(false); 65 SetStartFromNullFlag(false);
65 SetSplineFlag(false); << 66 SetIntegral(true);
66 SetCrossSectionType(fEmOnePeak); << 67 SetMinKinEnergy(keV);
67 SetSecondaryParticle(G4Proton::Proton()); << 68 SetMaxKinEnergy(PeV);
68 SetProcessSubType(fCoulombScattering); << 69 thEnergy = PeV;
>> 70 thEnergyElec = PeV;
>> 71 if(name == "CoulombScat") {
>> 72 thEnergy = 10.*MeV;
>> 73 thEnergyElec = 10.*GeV;
>> 74 }
>> 75 SetLambdaBinning(120);
>> 76 SetSecondaryParticle(G4Electron::Electron());
>> 77 buildElmTableFlag = true;
69 } 78 }
70 79
71 //....oooOO0OOooo........oooOO0OOooo........oo 80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 81
73 G4CoulombScattering::G4CoulombScattering(const << 82 G4CoulombScattering::~G4CoulombScattering()
74 : G4CoulombScattering(nam, true) <<
75 {} <<
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} 83 {}
82 <<
83 //....oooOO0OOooo........oooOO0OOooo........oo <<
84 <<
85 G4CoulombScattering::~G4CoulombScattering() = <<
86 <<
87 //....oooOO0OOooo........oooOO0OOooo........oo <<
88 <<
89 G4bool G4CoulombScattering::IsApplicable(const <<
90 { <<
91 return (p.GetPDGCharge() != 0.0); <<
92 } <<
93 84
94 //....oooOO0OOooo........oooOO0OOooo........oo 85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 86
96 void G4CoulombScattering::InitialiseProcess(co 87 void G4CoulombScattering::InitialiseProcess(const G4ParticleDefinition* p)
97 { 88 {
98 // second initialisation not allowed for the << 89 if(!isInitialised) {
99 // this means that polar angle limit change << 90 isInitialised = true;
100 // after first initialisation << 91 aParticle = p;
101 if(isInitialised) { return; } << 92 G4double mass = p->GetPDGMass();
102 << 93 if (mass > GeV || p->GetParticleType() == "nucleus") {
103 G4EmParameters* param = G4EmParameters::Inst << 94 buildElmTableFlag = false;
104 G4double a = param->FactorForAngleLimit()*CL << 95 verboseLevel = 0;
105 q2Max = 0.5*a*a; << 96 } else {
106 G4double theta = param->MscThetaLimit(); << 97 G4String name = p->GetParticleName();
107 << 98 if(name != "e-" && name != "e+" &&
108 // restricted or non-restricted cross sectio << 99 name != "mu+" && name != "mu-" && name != "pi+" &&
109 if(isCombined) { << 100 name != "kaon+" && name != "proton" ) verboseLevel = 0;
110 if(theta == CLHEP::pi) { <<
111 // for restriced single scattering chang <<
112 SetCrossSectionType(fEmIncreasing); <<
113 SetStartFromNullFlag(true); <<
114 } 101 }
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); <<
126 ion = true; <<
127 if(name != "GenericIon") { SetVerboseLevel <<
128 } else { <<
129 if(name != "e-" && name != "e+" && <<
130 name != "mu+" && name != "mu-" && name <<
131 name != "kaon+" && name != "proton" ) { <<
132 } <<
133 /* <<
134 G4cout << "### G4CoulombScattering::Initiali <<
135 << p->GetParticleName() <<
136 << " Emin(MeV)= " << MinKinEnergy()/MeV <<
137 << " Emax(TeV)= " << MaxKinEnergy()/TeV <<
138 << " nbins= " << LambdaBinning() <<
139 << " theta= " << theta <<
140 << " mass(MeV)= " << mass <<
141 << " isCombined=" << isCombined <<
142 << " ion=" << ion <<
143 << G4endl; <<
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 <<
159 102
160 G4double G4CoulombScattering::MinPrimaryEnergy << 103 G4double emin = MinKinEnergy();
161 const G4Material* mat) << 104 G4double emax = MaxKinEnergy();
162 { << 105 G4double eth = thEnergy;
163 // Pure Coulomb scattering << 106 if(mass < MeV) eth = thEnergyElec;
164 G4double emin = 0.0; << 107 if(eth > emin) {
165 << 108 G4eCoulombScatteringModel* model =
166 // Coulomb scattering combined with multiple << 109 new G4eCoulombScatteringModel(thetaMin,thetaMax,buildElmTableFlag,q2Max);
167 G4double theta = G4EmParameters::Instance()- << 110 model->SetLowEnergyLimit(emin);
168 << 111 model->SetHighEnergyLimit(std::min(eth,emax));
169 if(0.0 < theta) { << 112 AddEmModel(1, model);
170 G4double p2 = q2Max*mat->GetIonisation()-> << 113 }
171 G4double mass = part->GetPDGMass(); << 114 if(eth < emax) {
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas << 115 G4CoulombScatteringModel* model =
>> 116 new G4CoulombScatteringModel(thetaMin,thetaMax,buildElmTableFlag,q2Max);
>> 117 model->SetLowEnergyLimit(eth);
>> 118 model->SetHighEnergyLimit(emax);
>> 119 AddEmModel(2, model);
>> 120 }
173 } 121 }
174 <<
175 return emin; <<
176 } 122 }
177 123
178 //....oooOO0OOooo........oooOO0OOooo........oo 124 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 125
180 void G4CoulombScattering::StreamProcessInfo(st << 126 void G4CoulombScattering::PrintInfo()
181 { 127 {
182 G4double tetmin = G4EmParameters::Instance() << 128 G4cout << " Scattering of " << aParticle->GetParticleName()
183 outFile << " "; << 129 << " with " << thetaMin/degree
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" << 130 << " < Theta(degree) < " << thetaMax/degree
185 else { outFile << tetmin; } << 131 << "; Eth(MeV)= ";
186 outFile << " < Theta(degree) < 180"; << 132 if(aParticle->GetPDGMass() < MeV) G4cout << thEnergyElec;
>> 133 else G4cout << thEnergy;
187 134
188 if(q2Max < DBL_MAX) { << 135 if(q2Max < DBL_MAX) G4cout << "; q2Max(GeV^2)= " << q2Max/(GeV*GeV);
189 outFile << ", pLimit(GeV^1)= " << std::sqr << 136 G4cout << G4endl;
190 } <<
191 outFile << G4endl; <<
192 } 137 }
193 138
194 //....oooOO0OOooo........oooOO0OOooo........oo 139 //....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 <<
207 140