dnaphysics/src/DetectorConstruction.cc

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0025 //
0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028
0029 // This example is provided by the Geant4-DNA collaboration
0030 // Any report or published results obtained using the Geant4-DNA software
0031 // shall cite the following Geant4-DNA collaboration publications:
0032 // Med. Phys. 45 (2018) e722-e739
0033 // Phys. Med. 31 (2015) 861-874
0034 // Med. Phys. 37 (2010) 4692-4708
0035 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0036 //
0037 // The Geant4-DNA web site is available at http://geant4-dna.org
0038 //
0039
0040 #include "DetectorConstruction.hh"
0041 #include "DetectorMessenger.hh"
0042 #include "PhysicsList.hh"
0043
0044 #include "G4LogicalVolumeStore.hh"
0045 #include "G4NistManager.hh"
0046 #include "G4RunManager.hh"
0047 #include "G4SystemOfUnits.hh"
0048 #include "G4UserLimits.hh"
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0051
0052 DetectorConstruction::DetectorConstruction(PhysicsList* ptr)
0053   : G4VUserDetectorConstruction(),
0054     fpWaterMaterial(nullptr),
0055     fLogicWorld(nullptr),
0056     fPhysiWorld(nullptr)
0057 {
0058   // Create commands for interactive definition of the detector
0059   fDetectorMessenger = new DetectorMessenger(this, ptr);
0060
0061   // Default values
0062   //
0063   // World size
0064   fWorldSize = 100 *um;
0065   // and material
0066   G4NistManager* man = G4NistManager::Instance();
0067   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0068   fpWaterMaterial = H2O;
0069 }
0070
0071 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0072
0073 DetectorConstruction::~DetectorConstruction()
0074 {
0075   delete fDetectorMessenger;
0076 }
0077
0078 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0079
0080 void DetectorConstruction::DefineMaterials()
0081 {
0082   // Water is defined from NIST material database
0083   G4NistManager* man = G4NistManager::Instance();
0084
0085   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0086
0087   /*
0088    If one wishes to test other density value for water material,
0089    one should use instead:
0090    G4Material * H2O = man->BuildMaterialWithNewDensity("G4_WATER_MODIFIED",
0091    "G4_WATER",1.100*g/cm3);
0092
0093    Note: any string for "G4_WATER_MODIFIED" parameter is accepted
0094    and "G4_WATER" parameter should not be changed
0095    Both materials are created and can be selected from dna.mac
0096    */
0097   fpWaterMaterial = H2O;
0098
0099   // G4cout << "-> Density of water material (g/cm3)="
0100   //  << fpWaterMaterial->GetDensity()/(g/cm/cm/cm) << G4endl;
0101
0102   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0103 }
0104
0105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0106
0107 G4Material*
0108 DetectorConstruction::MaterialWithDensity(G4String name, G4double density)
0109 {
0110   // Water is defined from NIST material database
0111   G4NistManager* man = G4NistManager::Instance();
0112
0113   G4Material * material = man->BuildMaterialWithNewDensity(name,
0114    "G4_WATER", density);
0115
0116    G4cout << "-> Density of water_modified material (g/cm3)="
0117     << material->GetDensity()/(g/cm/cm/cm) << G4endl;
0118
0119  return material;
0120 }
0121
0122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0123
0124 G4VPhysicalVolume* DetectorConstruction::Construct()
0125 {
0126   if (fPhysiWorld) {
0127     return fPhysiWorld;
0128   }
0129
0130   // World volume
0131   G4double worldSizeX = fWorldSize;
0132   G4double worldSizeY = worldSizeX;
0133   G4double worldSizeZ = worldSizeX;
0134
0135   G4Box* solidWorld = new G4Box("World",  // its name
0136                                 worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2);
0137                                 // its size
0138
0139   fLogicWorld = new G4LogicalVolume(solidWorld,  // its solid
0140                                     fpWaterMaterial,  // its material
0141                                     "World");  // its name
0142
0143   fPhysiWorld = new G4PVPlacement(0,  // no rotation
0144                                   G4ThreeVector(),  // at (0,0,0)
0145                                   "World",  // its name
0146                                   fLogicWorld,  // its logical volume
0147                                   0,  // its mother volume
0148                                   false,  // no boolean operation
0149                                   0);  // copy number
0150
0151   // Visualization attributes - white
0152   G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
0153   worldVisAtt->SetVisibility(true);
0154   fLogicWorld->SetVisAttributes(worldVisAtt);
0155
0156   G4VisAttributes* worldVisAtt1 = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
0157   worldVisAtt1->SetVisibility(true);
0158
0159   // Shows how to introduce a 20 eV tracking cut
0160   // logicWorld->SetUserLimits(new G4UserLimits(DBL_MAX,DBL_MAX,DBL_MAX,20*eV));
0161
0162   return fPhysiWorld;
0163 }
0164
0165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0166
0167 void DetectorConstruction::SetMaterial(const G4String& materialChoice)
0168 {
0169   // Search the material by its name
0170   G4Material* pttoMaterial =
0171     G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
0172
0173   if (pttoMaterial) {
0174     fpWaterMaterial = pttoMaterial;
0175     if (fLogicWorld) {
0176       fLogicWorld->SetMaterial(fpWaterMaterial);
0177     }
0178     G4RunManager::GetRunManager()->GeometryHasBeenModified();
0179   }
0180 }
0181
0182 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0183
0184 void DetectorConstruction::SetSize(G4double value)
0185 {
0186   fWorldSize = value;
0187   G4RunManager::GetRunManager()->ReinitializeGeometry();
0188 }