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25 //
26 // G4SingleParticleSource source implementation
27 //
28 // Author: Fan Lei, QinetiQ ltd. - 05/02/2004
29 // Customer: ESA/ESTEC
30 // Revision: Andrea Dotti, SLAC
31 // --------------------------------------------------------------------
32
33 #include <cmath>
34
35 #include "G4SingleParticleSource.hh"
36
37 #include "G4SystemOfUnits.hh"
38 #include "G4PrimaryParticle.hh"
39 #include "G4Event.hh"
40 #include "Randomize.hh"
41 #include "G4ParticleTable.hh"
42 #include "G4Geantino.hh"
43 #include "G4ParticleDefinition.hh"
44 #include "G4IonTable.hh"
45 #include "G4Ions.hh"
46 #include "G4TrackingManager.hh"
47 #include "G4Track.hh"
48 #include "G4AutoLock.hh"
49
50 G4SingleParticleSource::part_prop_t::part_prop_t()
51 {
52 momentum_direction = G4ParticleMomentum(1,0,0);
53 energy = 1.*MeV;
54 position = G4ThreeVector();
55 }
56
57 G4SingleParticleSource::G4SingleParticleSource()
58 {
59 // Initialise all variables
60 // Position distribution Variables
61
62 NumberOfParticlesToBeGenerated = 1;
63 definition = G4Geantino::GeantinoDefinition();
64
65 charge = 0.0;
66 time = 0;
67 polarization = G4ThreeVector();
68
69 biasRndm = new G4SPSRandomGenerator();
70 posGenerator = new G4SPSPosDistribution();
71 posGenerator->SetBiasRndm(biasRndm);
72 angGenerator = new G4SPSAngDistribution();
73 angGenerator->SetPosDistribution(posGenerator);
74 angGenerator->SetBiasRndm(biasRndm);
75 eneGenerator = new G4SPSEneDistribution();
76 eneGenerator->SetBiasRndm(biasRndm);
77
78 verbosityLevel = 0;
79
80 G4MUTEXINIT(mutex);
81 }
82
83 G4SingleParticleSource::~G4SingleParticleSource()
84 {
85 delete biasRndm;
86 delete posGenerator;
87 delete angGenerator;
88 delete eneGenerator;
89
90 G4MUTEXDESTROY(mutex);
91 }
92
93 void G4SingleParticleSource::SetVerbosity(G4int vL)
94 {
95 G4AutoLock l(&mutex);
96 verbosityLevel = vL;
97 posGenerator->SetVerbosity(vL);
98 angGenerator->SetVerbosity(vL);
99 eneGenerator->SetVerbosity(vL);
100 }
101
102 void G4SingleParticleSource::
103 SetParticleDefinition(G4ParticleDefinition* aParticleDefinition)
104 {
105 definition = aParticleDefinition;
106 charge = aParticleDefinition->GetPDGCharge();
107 }
108
109 void G4SingleParticleSource::GeneratePrimaryVertex(G4Event* evt)
110 {
111 if (definition == nullptr)
112 {
113 // TODO: Should this rise an exception???
114 return;
115 }
116
117 if (verbosityLevel > 1)
118 {
119 G4cout << " NumberOfParticlesToBeGenerated: "
120 << NumberOfParticlesToBeGenerated << G4endl;
121 }
122
123 part_prop_t& pp = ParticleProperties.Get();
124
125 // Position stuff
126 pp.position = posGenerator->GenerateOne();
127
128 // Create a new vertex
129 auto* vertex = new G4PrimaryVertex(pp.position,time);
130
131 for (G4int i=0; i<NumberOfParticlesToBeGenerated; ++i)
132 {
133 // Angular stuff
134 pp.momentum_direction = angGenerator->GenerateOne();
135
136 // Energy stuff
137 pp.energy = eneGenerator->GenerateOne(definition);
138
139 if (verbosityLevel >= 2)
140 {
141 G4cout << "Creating primaries and assigning to vertex" << G4endl;
142 }
143
144 // Create new primaries and set them to the vertex
145 //
146 G4double mass = definition->GetPDGMass();
147 auto* particle = new G4PrimaryParticle(definition);
148 particle->SetKineticEnergy(pp.energy );
149 particle->SetMass( mass );
150 particle->SetMomentumDirection( pp.momentum_direction );
151 particle->SetCharge( charge );
152 particle->SetPolarization(polarization.x(),
153 polarization.y(),
154 polarization.z());
155 if (verbosityLevel > 1)
156 {
157 G4cout << "Particle name: " << definition->GetParticleName() << G4endl;
158 G4cout << " Energy: " << pp.energy << G4endl;
159 G4cout << " Position: " << pp.position << G4endl;
160 G4cout << " Direction: " << pp.momentum_direction << G4endl;
161 }
162
163 // Set bweight equal to the multiple of all non-zero weights
164 //
165 G4double weight = eneGenerator->GetWeight()*biasRndm->GetBiasWeight();
166
167 if(eneGenerator->IfApplyEnergyWeight())
168 {
169 weight *= eneGenerator->GetArbEneWeight(pp.energy);
170 }
171
172 // Pass it to primary particle
173 //
174 particle->SetWeight(weight);
175 vertex->SetPrimary(particle);
176 }
177
178 // Now pass the weight to the primary vertex. CANNOT be used here!
179 // vertex->SetWeight(particle_weight);
180 evt->AddPrimaryVertex(vertex);
181
182 if (verbosityLevel > 1)
183 {
184 G4cout << " Primary Vetex generated !" << G4endl;
185 }
186 }
187