TestEm6/src/DetectorConstruction.cc

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0026 /// \file electromagnetic/TestEm6/src/DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028 //
0029 //
0030 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032
0033 #include "DetectorConstruction.hh"
0034
0035 #include "DetectorMessenger.hh"
0036
0037 #include "G4Box.hh"
0038 #include "G4GeometryManager.hh"
0039 #include "G4LogicalVolume.hh"
0040 #include "G4LogicalVolumeStore.hh"
0041 #include "G4Material.hh"
0042 #include "G4NistManager.hh"
0043 #include "G4PVPlacement.hh"
0044 #include "G4PhysicalVolumeStore.hh"
0045 #include "G4RunManager.hh"
0046 #include "G4SolidStore.hh"
0047 #include "G4SystemOfUnits.hh"
0048 #include "G4UniformMagField.hh"
0049 #include "G4UnitsTable.hh"
0050 #include "G4UserLimits.hh"
0051
0052 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0053
0054 DetectorConstruction::DetectorConstruction()
0055   : G4VUserDetectorConstruction(),
0056     fP_Box(0),
0057     fL_Box(0),
0058     fBoxSize(500 * m),
0059     fMaterial(0),
0060     fMagField(0),
0061     fUserLimits(0),
0062     fDetectorMessenger(0)
0063 {
0064   DefineMaterials();
0065   SetMaterial("Iron");
0066
0067   // create UserLimits
0068   fUserLimits = new G4UserLimits();
0069
0070   // create commands for interactive definition of the detector
0071   fDetectorMessenger = new DetectorMessenger(this);
0072 }
0073
0074 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0075
0076 DetectorConstruction::~DetectorConstruction()
0077 {
0078   delete fDetectorMessenger;
0079 }
0080
0081 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0082
0083 G4VPhysicalVolume* DetectorConstruction::Construct()
0084 {
0085   return ConstructVolumes();
0086 }
0087
0088 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0089
0090 void DetectorConstruction::DefineMaterials()
0091 {
0092   G4double a, z, density;
0093
0094   new G4Material("Beryllium", z = 4., a = 9.012182 * g / mole, density = 1.848 * g / cm3);
0095   new G4Material("Carbon", z = 6., a = 12.011 * g / mole, density = 2.265 * g / cm3);
0096   new G4Material("Iron", z = 26., a = 55.85 * g / mole, density = 7.870 * g / cm3);
0097
0098   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0099 }
0100
0101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0102
0103 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
0104 {
0105   G4GeometryManager::GetInstance()->OpenGeometry();
0106   G4PhysicalVolumeStore::GetInstance()->Clean();
0107   G4LogicalVolumeStore::GetInstance()->Clean();
0108   G4SolidStore::GetInstance()->Clean();
0109
0110   G4Box* sBox = new G4Box("Container",  // its name
0111                           fBoxSize / 2, fBoxSize / 2, fBoxSize / 2);  // its dimensions
0112
0113   fL_Box = new G4LogicalVolume(sBox,  // its shape
0114                                fMaterial,  // its material
0115                                fMaterial->GetName());  // its name
0116
0117   fL_Box->SetUserLimits(fUserLimits);
0118
0119   fP_Box = new G4PVPlacement(0,  // no rotation
0120                              G4ThreeVector(),  // at (0,0,0)
0121                              fL_Box,  // its logical volume
0122                              fMaterial->GetName(),  // its name
0123                              0,  // its mother  volume
0124                              false,  // no boolean operation
0125                              0);  // copy number
0126
0127   PrintParameters();
0128
0129   //
0130   // always return the root volume
0131   //
0132   return fP_Box;
0133 }
0134
0135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0136
0137 void DetectorConstruction::PrintParameters()
0138 {
0139   G4cout << "\n The Box is " << G4BestUnit(fBoxSize, "Length") << " of " << fMaterial->GetName()
0140          << G4endl;
0141 }
0142
0143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0144
0145 void DetectorConstruction::SetMaterial(const G4String& name)
0146 {
0147   G4cout << "###SetMaterial" << G4endl;
0148
0149   // get the pointer to the existing material
0150   G4Material* mat = G4Material::GetMaterial(name, false);
0151
0152   // create the material by its name
0153   if (!mat) {
0154     mat = G4NistManager::Instance()->FindOrBuildMaterial(name);
0155   }
0156
0157   if (mat && mat != fMaterial) {
0158     G4cout << "### New target material: " << mat->GetName() << G4endl;
0159     fMaterial = mat;
0160     if (fL_Box) {
0161       fL_Box->SetMaterial(mat);
0162       G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0163     }
0164   }
0165 }
0166
0167 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0168
0169 void DetectorConstruction::SetSize(G4double value)
0170 {
0171   fBoxSize = value;
0172 }
0173
0174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0175
0176 #include "G4FieldManager.hh"
0177 #include "G4TransportationManager.hh"
0178
0179 void DetectorConstruction::SetMagField(G4double fieldValue)
0180 {
0181   // apply a global uniform magnetic field along Z axis
0182   G4FieldManager* fieldMgr = G4TransportationManager::GetTransportationManager()->GetFieldManager();
0183
0184   if (fMagField) delete fMagField;  // delete the existing magn field
0185
0186   if (fieldValue != 0.)  // create a new one if non nul
0187   {
0188     fMagField = new G4UniformMagField(G4ThreeVector(0., 0., fieldValue));
0189     fieldMgr->SetDetectorField(fMagField);
0190     fieldMgr->CreateChordFinder(fMagField);
0191   }
0192   else {
0193     fMagField = 0;
0194     fieldMgr->SetDetectorField(fMagField);
0195   }
0196 }
0197
0198 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0199
0200 void DetectorConstruction::SetMaxStepSize(G4double val)
0201 {
0202   // set the maximum allowed step size
0203   //
0204   if (val <= DBL_MIN) {
0205     G4cout << "\n --->warning from SetMaxStepSize: maxStep " << val
0206            << " out of range. Command refused" << G4endl;
0207     return;
0208   }
0209   fUserLimits->SetMaxAllowedStep(val);
0210 }
0211
0212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0213
0214 #include "G4RunManager.hh"
0215
0216 void DetectorConstruction::UpdateGeometry()
0217 {
0218   G4RunManager::GetRunManager()->DefineWorldVolume(ConstructVolumes());
0219 }
0220
0221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......