source: trunk/examples/advanced/xray_fluorescence/src/XrayFluoPlanePrimaryGeneratorAction.cc@ 1304

Last change on this file since 1304 was 807, checked in by garnier, 17 years ago

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25//
26//
27// $Id: XrayFluoPlanePrimaryGeneratorAction.cc
28// GEANT4 tag $Name:
29//
30// Author: Alfonso Mantero (Alfonso.Mantero@ge.infn.it)
31//
32// History:
33// -----------
34// 02 Sep 2003 Alfonso Mantero created
35//
36// -------------------------------------------------------------------
37
38#include "XrayFluoPlanePrimaryGeneratorAction.hh"
39#include "G4DataVector.hh"
40#include "XrayFluoPlaneDetectorConstruction.hh"
41#include "XrayFluoPlanePrimaryGeneratorMessenger.hh"
42#include "XrayFluoRunAction.hh"
43#include "G4Event.hh"
44#include "G4ParticleGun.hh"
45#include "G4ParticleTable.hh"
46#include "G4ParticleDefinition.hh"
47#include "Randomize.hh"
48#include "XrayFluoAnalysisManager.hh"
49#include "XrayFluoDataSet.hh"
50
51//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
52
53XrayFluoPlanePrimaryGeneratorAction::XrayFluoPlanePrimaryGeneratorAction(XrayFluoPlaneDetectorConstruction* XrayFluoDC)
54 :rndmFlag("on"),beam("off"),spectrum("off"),isoVert("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 XrayFluoPlanePrimaryGeneratorMessenger(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 << "XrayFluoPlanePrimaryGeneratorAction created UUUUUUUUUUAAAAAAAAAAAAAAAAAAAAAAAaa" << G4endl;
81
82}
83
84
85//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
86
87XrayFluoPlanePrimaryGeneratorAction::~XrayFluoPlanePrimaryGeneratorAction()
88{
89 delete particleGun;
90 delete gunMessenger;
91 delete runManager;
92
93 G4cout << "XrayFluoPlanePrimaryGeneratorAction deleted" << G4endl;
94
95}
96
97//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98
99void XrayFluoPlanePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
100{
101 //this function is called at the begining of event
102 //
103 G4double z0 = -0.5*(XrayFluoDetector->GetWorldSizeZ());
104 G4double y0 = 0.*m, x0 = 0.*m;
105 G4double dX = 0.5*(XrayFluoDetector->GetWorldSizeXY())-(XrayFluoDetector->GetPlaneSizeXY());
106 if (rndmFlag == "on")
107
108 {y0 = (XrayFluoDetector->GetPlaneSizeXY())*(G4UniformRand()-0.5);
109 x0 = (XrayFluoDetector->GetPlaneSizeXY())*(G4UniformRand()-0.5) + dX;
110 }
111
112 z0 = -1 * dX;
113
114 particleGun->SetParticleMomentumDirection(G4ThreeVector(-1.,0.,1.));
115
116 particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
117
118 //randomize starting point
119 if (beam == "on")
120 {
121 G4double radius = 0.5 * mm;
122 G4double rho = radius*std::sqrt(G4UniformRand());
123 G4double theta = 2*pi*G4UniformRand()*rad;
124 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
125
126 G4double y = rho * std::sin(theta);
127 G4double x = rho * std::cos(theta);
128
129 particleGun->SetParticlePosition(G4ThreeVector(x,y,position));
130 }
131 //shoot particles according to a certain spectrum
132 if (spectrum =="on")
133 {
134 G4String particle = particleGun->GetParticleDefinition()
135 ->GetParticleName();
136 if(particle == "proton"|| particle == "alpha")
137 {
138 G4DataVector* energies = runManager->GetEnergies();
139 G4DataVector* data = runManager->GetData();
140
141 G4double sum = runManager->GetDataSum();
142 G4double partSum = 0;
143 G4int j = 0;
144 G4double random= sum*G4UniformRand();
145 while (partSum<random)
146 {
147 partSum += (*data)[j];
148 j++;
149 }
150
151 particleGun->SetParticleEnergy((*energies)[j]);
152
153 }
154 else if (particle == "gamma")
155 {
156 const XrayFluoDataSet* dataSet = runManager->GetGammaSet();
157
158 G4int i = 0;
159 G4int id = 0;
160 G4double minEnergy = 0. * keV;
161 G4double particleEnergy= 0.;
162 G4double maxEnergy = 10. * keV;
163 G4double energyRange = maxEnergy - minEnergy;
164
165 while ( i == 0)
166 {
167 G4double random = G4UniformRand();
168
169 G4double randomNum = G4UniformRand(); //*5.0E6;
170
171 particleEnergy = (random*energyRange) + minEnergy;
172
173 if ((dataSet->FindValue(particleEnergy,id)) > randomNum)
174 {
175 i = 1;
176
177 }
178 }
179 particleGun->SetParticleEnergy(particleEnergy);
180 }
181 }
182
183 if (isoVert == "on")
184 {
185 G4double rho = 1. *m;
186 //theta in [0;pi/2]
187 G4double theta = (pi/2)*G4UniformRand();
188 //phi in [-pi;pi]
189 G4double phi = (G4UniformRand()*2*pi)- pi;
190 G4double x = rho*std::sin(theta)*std::sin(phi);
191 G4double y = rho*std::sin(theta)*std::cos(phi);
192 G4double z = -(rho*std::cos(theta));
193 particleGun->SetParticlePosition(G4ThreeVector(x,y,z));
194
195 G4double Xdim = XrayFluoDetector->GetPlaneSizeXY();
196 G4double Ydim = XrayFluoDetector->GetPlaneSizeXY();
197
198 G4double Dx = Xdim*(G4UniformRand()-0.5);
199
200 G4double Dy = Ydim*(G4UniformRand()-0.5);
201
202 particleGun->SetParticleMomentumDirection(G4ThreeVector(-x+Dx,-y+Dy,-z));
203
204 }
205#ifdef G4ANALYSIS_USE
206
207 G4double partEnergy = particleGun->GetParticleEnergy();
208 XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
209 analysis->analysePrimaryGenerator(partEnergy/keV);
210
211#endif
212
213 particleGun->GeneratePrimaryVertex(anEvent);
214}
215
216//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
217
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