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25 //
26 //
27 //
28 // Author: Elena Guardincerri (Elena.Guardincerri@ge.infn.it)
29 //
30 // History:
31 // -----------
32 // 28 Nov 2001 Elena Guardincerri Created
33 //
34 // -------------------------------------------------------------------
35
36 #include "XrayFluoPrimaryGeneratorAction.hh"
37 #include "XrayFluoDetectorConstruction.hh"
38 #include "XrayFluoPrimaryGeneratorMessenger.hh"
39 #include "XrayFluoRunAction.hh"
40 #include "G4Event.hh"
41 #include "G4Gamma.hh"
42 #include "G4ParticleGun.hh"
43 #include "G4ParticleTable.hh"
44 #include "G4ParticleDefinition.hh"
45 #include "G4MTRunManager.hh"
46 #include "Randomize.hh"
47 #include "XrayFluoAnalysisManager.hh"
48 #include "XrayFluoDataSet.hh"
49 #include "G4PhysicalConstants.hh"
50 #include "G4SystemOfUnits.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
53
54 XrayFluoPrimaryGeneratorAction::XrayFluoPrimaryGeneratorAction(const
55 XrayFluoDetectorConstruction* XrayFluoDC)
56 :rndmFlag("off"),beam("off"),spectrum("off"),isoVert("off"),phaseSpaceGunFlag(false),
57 rayleighFlag(true), detectorPosition(0)
58 {
59 runAction = 0;
60 XrayFluoDetector = XrayFluoDC;
61
62 G4int n_particle = 1;
63 particleGun = new G4ParticleGun(n_particle);
64
65 //create a messenger for this class
66 gunMessenger = new XrayFluoPrimaryGeneratorMessenger(this);
67
68 // default particle kinematic
69 G4ParticleDefinition* particle
70 = G4Gamma::Definition();
71 particleGun->SetParticleDefinition(particle);
72 particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
73 particleGun->SetParticleEnergy(10. * keV);
74
75 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
76 particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position));
77
78 G4cout << "XrayFluoPrimaryGeneratorAction created" << G4endl;
79
80 }
81
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83
84 void XrayFluoPrimaryGeneratorAction::ActivatePhaseSpace(G4String fileName) {
85
86 // load phase-space
87 phaseSpaceGunFlag = true;
88
89 // reads the data stored on disk form previous runs
90 // and get these data to data members
91
92 XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
93 analysis->LoadGunData(fileName, rayleighFlag);
94 detectorPosition = XrayFluoDetector->GetDetectorPosition();
95 detectorPosition.setR(detectorPosition.r()-(5.*cm)); // 5 cm before the detector, so in front of it.
96
97 }
98
99 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
100
101 void XrayFluoPrimaryGeneratorAction::SetRayleighFlag (G4bool value)
102 {
103 rayleighFlag = value;
104 }
105
106
107 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
108
109 XrayFluoPrimaryGeneratorAction::~XrayFluoPrimaryGeneratorAction()
110 {
111 delete particleGun;
112 delete gunMessenger;
113 }
114
115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
116
117 void XrayFluoPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
118 {
119 //retrieve runAction, if not done
120 if (!runAction)
121 {
122 //Sequential runaction
123 if (G4RunManager::GetRunManager()->GetRunManagerType() ==
124 G4RunManager::sequentialRM)
125 runAction = static_cast<const XrayFluoRunAction*>
126 (G4RunManager::GetRunManager()->GetUserRunAction());
127 else //MT master runaction
128 runAction = static_cast<const XrayFluoRunAction*>
129 (G4MTRunManager::GetMasterRunManager()->GetUserRunAction());
130 if (!runAction)
131 G4cout << "Something wrong here!" << G4endl;
132 }
133
134 //this function is called at the begining of event
135 //
136 G4double z0 = -0.5*(XrayFluoDetector->GetWorldSizeZ());
137 G4double y0 = 0.*cm, x0 = 0.*cm;
138 if (rndmFlag == "on")
139 {
140 y0 = (XrayFluoDetector->GetDia3SizeXY())/std::sqrt(2.)*(G4UniformRand()-0.5); // it was GetSampleSizeXY(),
141 x0 = (XrayFluoDetector->GetDia3SizeXY())/std::sqrt(2.)*(G4UniformRand()-0.5); // not divided by std::sqrt(2.)
142 }
143 particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
144
145 //randomize starting point
146 if (beam == "on")
147 {
148 G4double radius = 0.5 * mm;
149 G4double rho = radius*std::sqrt(G4UniformRand());
150 G4double theta = 2*pi*G4UniformRand()*rad;
151 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
152
153 G4double y = rho * std::sin(theta);
154 G4double x = rho * std::cos(theta);
155
156 particleGun->SetParticlePosition(G4ThreeVector(x,y,position));
157 }
158 //shoot particles according to a certain spectrum
159 if (spectrum =="on")
160 {
161 G4String particle = particleGun->GetParticleDefinition()
162 ->GetParticleName();
163 if(particle == "proton"|| particle == "alpha")
164 {
165 G4DataVector* energies = runAction->GetEnergies();
166 G4DataVector* data = runAction->GetData();
167
168 G4double sum = runAction->GetDataSum();
169 G4double partSum = 0;
170 G4int j = 0;
171 G4double random= sum*G4UniformRand();
172 while (partSum<random)
173 {
174 partSum += (*data)[j];
175 j++;
176 }
177
178 particleGun->SetParticleEnergy((*energies)[j]);
179
180 }
181 else if (particle == "gamma")
182 {
183 const XrayFluoDataSet* dataSet = runAction->GetGammaSet();
184
185 G4int i = 0;
186 G4int id = 0;
187 G4double minEnergy = 0. * keV;
188 G4double particleEnergy= 0.;
189 G4double maxEnergy = 10. * keV;
190 G4double energyRange = maxEnergy - minEnergy;
191
192 while ( i == 0)
193 {
194 G4double random = G4UniformRand();
195
196 G4double randomNum = G4UniformRand(); //*5.0E6;
197
198 particleEnergy = (random*energyRange) + minEnergy;
199
200 if ((dataSet->FindValue(particleEnergy,id)) > randomNum)
201 {
202 i = 1;
203
204 }
205 }
206 particleGun->SetParticleEnergy(particleEnergy);
207 }
208 }
209
210 // Randomize starting point and direction
211
212 if (isoVert == "on")
213 {
214 G4double rho = 1. *m;
215 //theta in [0;pi/2]
216 G4double theta = (pi/2)*G4UniformRand();
217 //phi in [-pi;pi]
218 G4double phi = (G4UniformRand()*2*pi)- pi;
219 G4double x = rho*std::sin(theta)*std::sin(phi);
220 G4double y = rho*std::sin(theta)*std::cos(phi);
221 G4double z = -(rho*std::cos(theta));
222 particleGun->SetParticlePosition(G4ThreeVector(x,y,z));
223
224 G4double Xdim = XrayFluoDetector->GetSampleSizeXY();
225 G4double Ydim = XrayFluoDetector->GetSampleSizeXY();
226
227 G4double Dx = Xdim*(G4UniformRand()-0.5);
228
229 G4double Dy = Ydim*(G4UniformRand()-0.5);
230
231 particleGun->SetParticleMomentumDirection(G4ThreeVector(-x+Dx,-y+Dy,-z));
232
233 }
234
235 // using prevoiously genereated emissions from sample.....
236
237 if (phaseSpaceGunFlag){
238
239 particleGun->SetParticlePosition(detectorPosition);
240 particleGun->SetParticleMomentumDirection(detectorPosition);
241
242 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
243
244 const std::pair<G4double,G4String> kine =
245 XrayFluoAnalysisManager::getInstance()->GetEmittedParticleEnergyAndType();
246
247 G4double energy = kine.first;
248 G4ParticleDefinition* particle = particleTable->FindParticle(kine.second);
249
250 particleGun->SetParticleEnergy(energy);
251 particleGun->SetParticleDefinition(particle);
252
253
254 }
255
256 G4double partEnergy = particleGun->GetParticleEnergy();
257 XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
258 analysis->analysePrimaryGenerator(partEnergy/keV);
259
260
261 particleGun->GeneratePrimaryVertex(anEvent);
262 }
263
264 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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