dnaphysics/src/DetectorConstruction.cc

0001 //
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0024 // ********************************************************************
0025 //
0026 // This example is provided by the Geant4-DNA collaboration
0027 // Any report or published results obtained using the Geant4-DNA software
0028 // shall cite the following Geant4-DNA collaboration publications:
0029 // Med. Phys. 45 (2018) e722-e739
0030 // Phys. Med. 31 (2015) 861-874
0031 // Med. Phys. 37 (2010) 4692-4708
0032 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0033 //
0034 // The Geant4-DNA web site is available at http://geant4-dna.org
0035 //
0036 /// \file DetectorConstruction.cc
0037 /// \brief Implementation of the DetectorConstruction class
0038
0039 #include "DetectorConstruction.hh"
0040 #include "DetectorMessenger.hh"
0041 #include "PhysicsList.hh"
0042
0043 #include "G4LogicalVolumeStore.hh"
0044 #include "G4NistManager.hh"
0045 #include "G4RunManager.hh"
0046 #include "G4SystemOfUnits.hh"
0047 #include "G4UserLimits.hh"
0048
0049 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0050
0051 DetectorConstruction::DetectorConstruction(PhysicsList* ptr)
0052   : G4VUserDetectorConstruction(),
0053     fpWaterMaterial(nullptr),
0054     fLogicWorld(nullptr),
0055     fPhysiWorld(nullptr)
0056 {
0057   // Create commands for interactive definition of the detector
0058   fDetectorMessenger = new DetectorMessenger(this, ptr);
0059
0060   // Default values
0061   //
0062   // World size
0063   fWorldSize = 100 *um;
0064   // and material
0065   G4NistManager* man = G4NistManager::Instance();
0066   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0067   fpWaterMaterial = H2O;
0068 }
0069
0070 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0071
0072 DetectorConstruction::~DetectorConstruction()
0073 {
0074   delete fDetectorMessenger;
0075 }
0076
0077 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0078
0079 void DetectorConstruction::DefineMaterials()
0080 {
0081   // Water is defined from NIST material database
0082   G4NistManager* man = G4NistManager::Instance();
0083
0084   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0085
0086   /*
0087    If one wishes to test other density value for water material,
0088    one should use instead:
0089    G4Material * H2O = man->BuildMaterialWithNewDensity("G4_WATER_MODIFIED",
0090    "G4_WATER",1.100*g/cm3);
0091
0092    Note: any string for "G4_WATER_MODIFIED" parameter is accepted
0093    and "G4_WATER" parameter should not be changed
0094    Both materials are created and can be selected from dna.mac
0095    */
0096   fpWaterMaterial = H2O;
0097
0098   // G4cout << "-> Density of water material (g/cm3)="
0099   //  << fpWaterMaterial->GetDensity()/(g/cm/cm/cm) << G4endl;
0100
0101   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0102 }
0103
0104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0105
0106 G4Material*
0107 DetectorConstruction::MaterialWithDensity(G4String name, G4double density)
0108 {
0109   // Water is defined from NIST material database
0110   G4NistManager* man = G4NistManager::Instance();
0111
0112   G4Material * material = man->BuildMaterialWithNewDensity(name,
0113    "G4_WATER", density);
0114
0115    G4cout << "-> Density of water_modified material (g/cm3)="
0116     << material->GetDensity()/(g/cm/cm/cm) << G4endl;
0117
0118  return material;
0119 }
0120
0121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0122
0123 G4VPhysicalVolume* DetectorConstruction::Construct()
0124 {
0125   if (fPhysiWorld) {
0126     return fPhysiWorld;
0127   }
0128
0129   // World volume
0130   G4double worldSizeX = fWorldSize;
0131   G4double worldSizeY = worldSizeX;
0132   G4double worldSizeZ = worldSizeX;
0133
0134   G4Box* solidWorld = new G4Box("World",  // its name
0135                                 worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2);
0136                                 // its size
0137
0138   fLogicWorld = new G4LogicalVolume(solidWorld,  // its solid
0139                                     fpWaterMaterial,  // its material
0140                                     "World");  // its name
0141
0142   fPhysiWorld = new G4PVPlacement(0,  // no rotation
0143                                   G4ThreeVector(),  // at (0,0,0)
0144                                   "World",  // its name
0145                                   fLogicWorld,  // its logical volume
0146                                   0,  // its mother volume
0147                                   false,  // no boolean operation
0148                                   0);  // copy number
0149
0150   // Visualization attributes - white
0151   G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
0152   worldVisAtt->SetVisibility(true);
0153   fLogicWorld->SetVisAttributes(worldVisAtt);
0154
0155   G4VisAttributes* worldVisAtt1 = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
0156   worldVisAtt1->SetVisibility(true);
0157
0158   // Shows how to introduce a 20 eV tracking cut
0159   // logicWorld->SetUserLimits(new G4UserLimits(DBL_MAX,DBL_MAX,DBL_MAX,20*eV));
0160
0161   return fPhysiWorld;
0162 }
0163
0164 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0165
0166 void DetectorConstruction::SetMaterial(const G4String& materialChoice)
0167 {
0168   // Search the material by its name
0169   G4Material* pttoMaterial =
0170     G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
0171
0172   if (pttoMaterial) {
0173     fpWaterMaterial = pttoMaterial;
0174     if (fLogicWorld) {
0175       fLogicWorld->SetMaterial(fpWaterMaterial);
0176     }
0177     G4RunManager::GetRunManager()->GeometryHasBeenModified();
0178   }
0179 }
0180
0181 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0182
0183 void DetectorConstruction::SetSize(G4double value)
0184 {
0185   fWorldSize = value;
0186   G4RunManager::GetRunManager()->ReinitializeGeometry();
0187 }