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25 //
26 //
27 //
28 // Author: Alfonso Mantero (Alfonso.Mantero@ge.infn.it)
29 //
30 // History:
31 // -----------
32 // 02 Sep 2003 Alfonso Mantero created
33 //
34 // -------------------------------------------------------------------
35
36 #include "XrayFluoMercuryPrimaryGeneratorAction.hh"
37 #include "XrayFluoMercuryDetectorConstruction.hh"
38 #include "XrayFluoMercuryPrimaryGeneratorMessenger.hh"
39 #include "XrayFluoRunAction.hh"
40 #include "XrayFluoAnalysisManager.hh"
41 #include "XrayFluoDataSet.hh"
42 #include "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "G4DataVector.hh"
45 #include "G4Event.hh"
46 #include "G4ParticleGun.hh"
47 #include "G4ParticleTable.hh"
48 #include "G4ParticleDefinition.hh"
49 #include "Randomize.hh"
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
52
53 XrayFluoMercuryPrimaryGeneratorAction::XrayFluoMercuryPrimaryGeneratorAction(const XrayFluoMercuryDetectorConstruction* XrayFluoDC)
54 :globalFlag(false),spectrum("off")
55 {
56
57 XrayFluoDetector = XrayFluoDC;
58
59 G4int n_particle = 1;
60 particleGun = new G4ParticleGun(n_particle);
61
62 //create a messenger for this class
63 gunMessenger = new XrayFluoMercuryPrimaryGeneratorMessenger(this);
64 runManager = new XrayFluoRunAction();
65
66 // default particle kinematic
67
68 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
69 G4String particleName;
70 G4ParticleDefinition* particle
71 = particleTable->FindParticle(particleName="gamma");
72 particleGun->SetParticleDefinition(particle);
73 particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,-1.));
74
75
76 particleGun->SetParticleEnergy(10.*keV);
77 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
78 particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position));
79
80 G4cout << "XrayFluoMercuryPrimaryGeneratorAction created" << G4endl;
81
82 }
83
84
85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
86
87 XrayFluoMercuryPrimaryGeneratorAction::~XrayFluoMercuryPrimaryGeneratorAction()
88 {
89 delete particleGun;
90 delete gunMessenger;
91 delete runManager;
92
93 G4cout << "XrayFluoMercuryPrimaryGeneratorAction deleted" << G4endl;
94
95 }
96
97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98
99 void XrayFluoMercuryPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
100 {
101 //this function is called at the begining of event
102 //
103
104 // Conidering the sunas a Poin-like source.
105
106 G4double z0 = -0.5*(XrayFluoDetector->GetWorldSizeZ());
107 G4double y0 = 0.*m, x0 = 0.*m;
108
109
110 // Let's try to illuminate only the prtion of Mercury surface that can be seen by the detector.
111
112 G4double spacecraftLatitude = XrayFluoDetector->GetOrbitInclination();
113 G4double mercuryDia = XrayFluoDetector->GetMercuryDia();
114 G4double sunDia = XrayFluoDetector->GetSunDia();
115 G4double opticField = XrayFluoDetector->GetOpticAperture();
116
117
118 G4double a = 2*std::tan(opticField/2);
119
120 // if (!pointLikeFlag) {
121
122 // let's decide from wich point of the sun surface the particle is coming:
123
124 G4double theta = std::acos(2.*G4UniformRand() - 1.0);
125 G4double phi = 2. * pi * G4UniformRand();
126 G4double rho = sunDia/2;
127
128 G4double sunPosX = x0 + rho * std::sin(theta) * std::cos(phi);
129 G4double sunPosY = y0 + rho * std::sin(theta) * std::sin(phi);
130 G4double sunPosZ = z0 + rho * std::cos(theta);
131
132 particleGun->SetParticlePosition(G4ThreeVector(sunPosX,sunPosY,sunPosZ));
133
134 // the angle at the center of Mercury subtending the area seen by the optics:
135 G4double alpha = 2 * a/mercuryDia;
136
137 if(!globalFlag){
138 theta = alpha * G4UniformRand() + (180.*deg - spacecraftLatitude)-alpha/2.;
139 phi = alpha * G4UniformRand() + 90. * deg - alpha/2.;
140 }
141
142 else if(globalFlag){
143 theta = pi/2. * rad * G4UniformRand() + 90.*deg ; //was 900., probably an error
144 phi = 2*pi*rad * G4UniformRand() ;
145 }
146
147 rho = mercuryDia/2.;
148
149 G4double mercuryPosX = rho * std::sin(theta) * std::cos(phi);
150 G4double mercuryPosY = rho * std::sin(theta) * std::sin(phi);
151 G4double mercuryPosZ = rho * std::cos(theta);
152
153 particleGun->SetParticleMomentumDirection(
154 G4ThreeVector(mercuryPosX-sunPosX ,mercuryPosY-sunPosY,mercuryPosZ-sunPosZ));
155
156 // }
157 // if (pointLikeFlag) {
158
159 // // theta is the angle that the mean direction of the incident light (on the desired
160 // // point of the surface of Mercury) makes with the Z-axis
161 // G4double theta = std::asin( mercuryDia/2. * std::sin(spacecraftLatitude) /
162 // std::sqrt(std::pow(z0,2)+std::pow(mercuryDia/2.,2)-2*mercuryDia/2.*z0*std::cos(spacecraftLatitude)) );
163
164 // // on the y axis, the light emitted from the Sun must be in [theta-phi;theta+phi]
165 // G4double phi = std::asin( mercuryDia/2.*std::sin(spacecraftLatitude) + a*std::cos(spacecraftLatitude) /
166 // std::sqrt( std::pow(mercuryDia/2.*std::sin(spacecraftLatitude) + a*std::cos(spacecraftLatitude) , 2) +
167 // std::pow(z0 - mercuryDia/2.*std::cos(spacecraftLatitude) - a*std::sin(spacecraftLatitude) , 2)) )
168 // - theta;
169
170 // // on the x axis, the light emitted from the Sun must be in [-zeta;zeta]
171 // G4double zeta = std::atan( a/std::sqrt(std::pow(z0,2)+std::pow(mercuryDia,2)-2*mercuryDia*z0*std::cos(spacecraftLatitude)) );
172
173
174
175 // //alpha in [-zeta;zeta]
176 // G4double alpha = (2*zeta)*G4UniformRand() - zeta;
177 // //beta in [theta-phi;theta+phi]
178 // G4double beta = (G4UniformRand()*2*phi) - phi + theta;
179
180 // G4double dirY = std::sin(beta);
181 // G4double dirX = std::sin(alpha);
182
183 // particleGun->SetParticleMomentumDirection(G4ThreeVector(dirX.,dirY,1.));
184
185 // particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
186
187 // }
188
189
190
191 //shoot particles according to a certain spectrum
192 if (spectrum =="on")
193 {
194 G4String particle = particleGun->GetParticleDefinition()
195 ->GetParticleName();
196 if(particle == "proton"|| particle == "alpha")
197 {
198 G4DataVector* energies = runManager->GetEnergies();
199 G4DataVector* data = runManager->GetData();
200
201 G4double sum = runManager->GetDataSum();
202 G4double partSum = 0;
203 G4int j = 0;
204 G4double random= sum*G4UniformRand();
205 while (partSum<random)
206 {
207 partSum += (*data)[j];
208 j++;
209 }
210
211 particleGun->SetParticleEnergy((*energies)[j]);
212
213 }
214 else if (particle == "gamma")
215 {
216 const XrayFluoDataSet* dataSet = runManager->GetGammaSet();
217
218 G4int i = 0;
219 G4int id = 0;
220 G4double minEnergy = 0. * keV;
221 G4double particleEnergy= 0.;
222 G4double maxEnergy = 10. * keV;
223 G4double energyRange = maxEnergy - minEnergy;
224
225 while ( i == 0)
226 {
227 G4double random = G4UniformRand();
228
229 G4double randomNum = G4UniformRand(); //*5.0E6;
230
231 particleEnergy = (random*energyRange) + minEnergy;
232
233 if ((dataSet->FindValue(particleEnergy,id)) > randomNum)
234 {
235 i = 1;
236
237 }
238 }
239 particleGun->SetParticleEnergy(particleEnergy);
240 }
241 }
242
243
244 #ifdef G4ANALYSIS_USE
245
246 G4double partEnergy = particleGun->GetParticleEnergy();
247 XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
248 analysis->analysePrimaryGenerator(partEnergy/keV);
249
250 #endif
251
252 particleGun->GeneratePrimaryVertex(anEvent);
253 }
254
255 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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