Geant4  10.03.p02
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FFPrimaryGeneratorAction.cc
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26 // -------------------------------------------------------------
27 // =============== Begin Documentation Comments ===============
39 // ================ End Documentation Comments ================
40 //
41 // Modified:
42 //
43 // 23-06-14 BWendt
44 // Implemented "GetNeutronSourceCenter()" and added code to correctly sample
45 // the neutron starting location
46 //
47 // -------------------------------------------------------------
48 
49 #include "globals.hh"
50 
51 #include "G4Event.hh"
52 #include "G4LogicalVolume.hh"
53 #include "G4LogicalVolumeStore.hh"
54 #include "G4Neutron.hh"
55 #include "G4ParticleGun.hh"
56 #include "G4PhysicalVolumeStore.hh"
57 #include "G4SystemOfUnits.hh"
58 #include "G4Tubs.hh"
59 #include "G4VPhysicalVolume.hh"
60 #include "Randomize.hh"
61 
63 
64 
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69 #ifndef NDEBUG
70  fEventNumber(0),
71 #endif // NDEBUG
72  fH2OPhysical(NULL),
73  fNeutronPhysical(NULL),
74  fNeutronSolid(NULL),
75  fParticleGun(new G4ParticleGun(1)),
76  fTankPhysical(NULL)
77 {
79  fParticleGun->SetParticleEnergy(4.5 * MeV);
80 }
81 
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
85 {
86 #ifndef NDEBUG
87  G4cout << "Shooting event " << ++fEventNumber << G4endl;
88 #endif // NDEBUG
89  const G4ThreeVector sourceCenter = GetNeutronSourceCenter();
90 
91  // Sample the neutron source location
92  const G4double radius = fNeutronSolid->GetOuterRadius();
93  const G4double z = fNeutronSolid->GetZHalfLength() * 2;
94  G4ThreeVector randomLocation;
95  randomLocation.setRThetaPhi(radius * std::sqrt(G4UniformRand()),
96  G4UniformRand() * 180 * deg,
97  0);
98  randomLocation.setZ(z * (G4UniformRand() - 0.5));
99  G4ThreeVector location(randomLocation.x() + sourceCenter.x(),
100  randomLocation.y() + sourceCenter.y(),
101  randomLocation.z() + sourceCenter.z());
102 #ifndef NDEBUG
103  G4cout << "Emission Location: r: " << location << G4endl;
104 #endif // NDEBUG
105 
106  // Sample the neutron emission direction
107  G4ThreeVector direction;
108  direction.setRThetaPhi(1.0,
109  std::acos(G4UniformRand() * 2 - 1),
110  (G4UniformRand() * 2 - 1) * 180 * deg);
111 #ifndef NDEBUG
112  G4cout << "Emission Direction: r: " << direction << G4endl;
113 #endif // NDEBUG
114 
115  // Load the event
116  fParticleGun->SetParticlePosition(location);
117  fParticleGun->SetParticleMomentumDirection(direction);
118  fParticleGun->GeneratePrimaryVertex(event);
119 }
120 
121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
122 G4ThreeVector FFPrimaryGeneratorAction::
123 GetNeutronSourceCenter(void)
124 {
125  // Get the dimensions of the neutron source
126  if(fNeutronSolid == NULL)
127  {
128  G4LogicalVolume* temp
129  = G4LogicalVolumeStore::GetInstance()->GetVolume("NeutronSource");
130  if(temp != NULL)
131  {
132  fNeutronSolid = dynamic_cast< G4Tubs* >(temp->GetSolid());
133  }
134 
135  if(fNeutronSolid == NULL)
136  {
137  G4Exception("FFPrimaryGeneratorAction::"
138  "GeneratePrimaries(G4Event*)",
139  "Neutron source solid volume not found",
141  "This run will be aborted");
142  }
143  }
144 
145  // Get the position of the neutron source within the water
146  if(fNeutronPhysical == NULL)
147  {
148  fNeutronPhysical = G4PhysicalVolumeStore::GetInstance()
149  ->GetVolume("NeutronSource");
150  }
151 
152  if(fNeutronPhysical == NULL)
153  {
154  G4Exception("FFPrimaryGeneratorAction::GetNeutronSourceCenter(void)",
155  "Neutron source physical volume not found",
157  "This run will be aborted");
158  }
159 
160  // Get the position of the water within the tank
161  if(fH2OPhysical == NULL)
162  {
163  fH2OPhysical = G4PhysicalVolumeStore::GetInstance()
164  ->GetVolume("Tank_H2O");
165 
166  if(fH2OPhysical == NULL)
167  {
168  G4Exception("FFPrimaryGeneratorAction::"
169  "GetNeutronSourceCenter(void)",
170  "Tank H2O physical volume not found",
172  "This run will be aborted");
173  }
174  }
175 
176  // Get the position of the tank within the world
177  if(fTankPhysical == NULL)
178  {
179  fTankPhysical = G4PhysicalVolumeStore::GetInstance()
180  ->GetVolume("Tank_Wall");
181 
182  if(fTankPhysical == NULL)
183  {
184  G4Exception("FFPrimaryGeneratorAction::"
185  "GetNeutronSourceCenter(void)",
186  "Tank physical volume not found",
188  "This run will be aborted");
189  }
190  }
191 
192  return fNeutronPhysical->GetTranslation()
193  + fH2OPhysical->GetTranslation()
194  + fTankPhysical->GetTranslation();
195 }
196 
197 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
200 {
201  delete fParticleGun;
202 }
203 
204 
double x() const
Definition: G4Tubs.hh:85
G4VSolid * GetSolid() const
void SetParticleMomentumDirection(G4ParticleMomentum aMomentumDirection)
virtual void GeneratePrimaryVertex(G4Event *evt)
G4LogicalVolume * GetVolume(const G4String &name, G4bool verbose=true) const
double z() const
void setZ(double)
static G4PhysicalVolumeStore * GetInstance()
void SetParticlePosition(G4ThreeVector aPosition)
#define G4UniformRand()
Definition: Randomize.hh:97
G4GLOB_DLL std::ostream G4cout
static G4LogicalVolumeStore * GetInstance()
void setRThetaPhi(double r, double theta, double phi)
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
virtual void GeneratePrimaries(G4Event *event)
const G4ThreeVector & GetTranslation() const
void SetParticleEnergy(G4double aKineticEnergy)
double y() const
static G4Neutron * Definition()
Definition: G4Neutron.cc:54
G4double GetZHalfLength() const
tuple z
Definition: test.py:28
#define G4endl
Definition: G4ios.hh:61
static constexpr double MeV
Definition: G4SIunits.hh:214
Definition of the FFPrimaryGeneratorAction class.
double G4double
Definition: G4Types.hh:76
static constexpr double deg
Definition: G4SIunits.hh:152
G4VPhysicalVolume * GetVolume(const G4String &name, G4bool verbose=true) const
void SetParticleDefinition(G4ParticleDefinition *aParticleDefinition)
G4double GetOuterRadius() const