sdcounters/src/DetectorConstruction.cc

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0025 //
0026 // The `molcounters` example(s) are provided as part of Geant4-DNA
0027 // and any report or published result obtained using it shall cite
0028 // the respective Geant4-DNA collaboration publications.
0029 //
0030 // Reports or results obtained using the spatially-aware `MoleculeCounter`
0031 // provided in this example, shall further cite:
0032 //
0033 // Velten & Tomé, Radiation Physics and Chemistry, 2023 (10.1016/j.radphyschem.2023.111194)
0034 //
0035 //
0036 // Author: Christian Velten (2025)
0037 //
0038
0039 #include "DetectorConstruction.hh"
0040
0041 #include "ScoreBasicMoleculeCounts.hh"
0042 #include "ScoreBasicReactionCounts.hh"
0043
0044 #include "G4Box.hh"
0045 #include "G4Ellipsoid.hh"
0046 #include "G4LogicalVolume.hh"
0047 #include "G4MultiFunctionalDetector.hh"
0048 #include "G4NistManager.hh"
0049 #include "G4Orb.hh"
0050 #include "G4PVPlacement.hh"
0051 #include "G4PhysicalConstants.hh"
0052 #include "G4PhysicalVolumeStore.hh"
0053 #include "G4SDManager.hh"
0054 #include "G4SystemOfUnits.hh"
0055 #include "G4VPhysicalVolume.hh"
0056 #include "G4VPrimitiveScorer.hh"
0057 #include "Randomize.hh"
0058 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0059 G4VPhysicalVolume* DetectorConstruction::Construct()
0060 {
0061   // Water is defined from NIST material database
0062   auto man = G4NistManager::Instance();
0063   auto water = man->FindOrBuildMaterial("G4_WATER");
0064
0065   //
0066   // World
0067   //
0068   const G4double worldXYZ = 1 * m;
0069
0070   auto solidWorld = new G4Box("World", 0.5 * worldXYZ, 0.5 * worldXYZ, 0.5 * worldXYZ);
0071   auto lvWorld = new G4LogicalVolume(solidWorld, water, "World");
0072   auto pvWorld =
0073     new G4PVPlacement(nullptr, G4ThreeVector(), lvWorld, "World", nullptr, false, 0, true);
0074
0075   //
0076   // Cell
0077   ConstructCell(pvWorld);
0078
0079   // return the world
0080   return pvWorld;
0081 }
0082 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0083 void DetectorConstruction::ConstructCell(G4VPhysicalVolume* pvWorld)
0084 {
0085   const G4double cellRadius = 7 * um;
0086   const G4double nucleusRadius = 4 * um;
0087
0088   const G4int nMitochondria = 100;
0089   const G4double mitoA = 0.55 * micrometer;
0090   const G4double mitoB = 0.25 * micrometer;
0091   const G4double mitoC = 0.90 * micrometer;
0092
0093   auto solidCell = new G4Orb("Cell", cellRadius);
0094   auto lvCell = new G4LogicalVolume(
0095     solidCell, G4NistManager::Instance()->FindOrBuildMaterial("G4_WATER"), "Cell");
0096   auto pvCell =
0097     new G4PVPlacement(nullptr, G4ThreeVector(), "Cell", lvCell, pvWorld, false, 0, true);
0098
0099   auto solidNucleus = new G4Orb("Nucleus", nucleusRadius);
0100   auto lvNucleus = new G4LogicalVolume(
0101     solidNucleus, G4NistManager::Instance()->FindOrBuildMaterial("G4_WATER"), "Nucleus");
0102
0103   new G4PVPlacement(nullptr, G4ThreeVector(), "Nucleus", lvNucleus, pvCell, false, 0, true);
0104
0105   auto solidMito = new G4Ellipsoid("Mitochondria", mitoA, mitoB, mitoC);
0106   auto lvMito = new G4LogicalVolume(
0107     solidMito, G4NistManager::Instance()->FindOrBuildMaterial("G4_WATER"), "Mitochondria");
0108
0109   for (auto i = 0; i < nMitochondria; ++i) {
0110     G4bool overlap = true;
0111     do {
0112       auto u = twopi * G4UniformRand();
0113       auto v = std::acos(2 * G4UniformRand() - 1);
0114       auto dr = G4UniformRand() * cellRadius;
0115       auto x = dr * std::cos(u) * std::sin(v);
0116       auto y = dr * std::sin(u) * std::sin(v);
0117       auto z = dr * std::cos(v);
0118       auto pos = G4ThreeVector(x, y, z);
0119
0120       auto phi = G4UniformRand() * 2 * pi;
0121       auto psi = G4UniformRand() * 2 * pi;
0122       auto rot = new G4RotationMatrix();
0123       rot->rotateX(psi);
0124       rot->rotateY(phi);
0125
0126       auto pvMito = new G4PVPlacement(rot, pos, "Mitochondria", lvMito, pvCell, false, i, false);
0127
0128       overlap = pvMito->CheckOverlaps(1000, 0, false);
0129       if (overlap) {
0130         G4PhysicalVolumeStore::DeRegister(pvMito);
0131       }
0132     } while (overlap);
0133   }
0134 }
0135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0136 void DetectorConstruction::ConstructSDandField()
0137 {
0138   G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
0139
0140   auto mfDetector = new G4MultiFunctionalDetector("mfDetector");
0141
0142   G4VPrimitiveScorer* primitivSpecies = new ScoreBasicMoleculeCounts("BasicMoleculeCounts", 1, "BasicCounter");
0143   mfDetector->RegisterPrimitive(primitivSpecies);
0144   primitivSpecies = new ScoreBasicMoleculeCounts("BasicCounter_VariablePrecision", 1,
0145                                                  "BasicCounter_VariablePrecision");
0146   mfDetector->RegisterPrimitive(primitivSpecies);
0147   primitivSpecies = new ScoreBasicReactionCounts("BasicReactionCounts", 1, "Reactions");
0148   mfDetector->RegisterPrimitive(primitivSpecies);
0149
0150   G4SDManager::GetSDMpointer()->AddNewDetector(mfDetector);
0151   SetSensitiveDetector("Cell", mfDetector);
0152 }
0153 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......