DetectorConstruction.cc

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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
// J. Comput. Phys. 274 (2014) 841-882
// The Geant4-DNA web site is available at http://geant4-dna.org
//

#include "DetectorConstruction.hh"

#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"

#include "G4VisAttributes.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

#include "G4SDManager.hh"
#include "G4MultiFunctionalDetector.hh"
#include "G4VPrimitiveScorer.hh"
#include "G4PSEnergyDeposit.hh"
#include "ScoreSpecies.hh"
#include "G4PSDoseDeposit.hh"
#include "PrimaryKiller.hh"

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DetectorConstruction::DetectorConstruction()
: G4VUserDetectorConstruction()
{}

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DetectorConstruction::~DetectorConstruction()
{}

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G4VPhysicalVolume* DetectorConstruction::Construct()
{
  // Water is defined from NIST material database
  G4NistManager * man = G4NistManager::Instance();
  G4Material* water = man->FindOrBuildMaterial("G4_WATER");
  
  //
  // World
  //
  double world_sizeXYZ = 1. * kilometer;
  
  G4Box* solidWorld =
  new G4Box("World",
            0.5*world_sizeXYZ,
            0.5*world_sizeXYZ,
            0.5*world_sizeXYZ);
  
  G4LogicalVolume* logicWorld =
  new G4LogicalVolume(solidWorld,
                      water,
                      "World");
  
  G4VPhysicalVolume* physWorld =
  new G4PVPlacement(0,                     //no rotation
                    G4ThreeVector(),       //its position at (0,0,0)
                    logicWorld,            //its logical volume
                    "World",               //its name
                    0,                     //its mother  volume
                    false,                 //no boolean operation
                    0,                     //copy number
                    true);                 //checking overlaps
  
  // Visualization attributes
  G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(.5, 1.0, .5));
  worldVisAtt->SetVisibility(true);
  logicWorld->SetVisAttributes(worldVisAtt);
  
  //always return the physical World
  return physWorld;
}

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void DetectorConstruction::ConstructSDandField()
{
  G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
  
  // declare World as a MultiFunctionalDetector scorer
  //
  G4MultiFunctionalDetector* mfDetector =
  new G4MultiFunctionalDetector("mfDetector");
  
  //--
  // Kill primary track after a chosen energy loss OR under a chosen
  // kinetic energy
  PrimaryKiller* primaryKiller = new PrimaryKiller("PrimaryKiller");
  primaryKiller->SetMinLossEnergyLimit(500.*eV); // default value
  primaryKiller->SetMaxLossEnergyLimit(1.*eV); // default value
  mfDetector->RegisterPrimitive(primaryKiller);
  
  //--
  // Record Species scorer:
  //  - scores number of species over time
  //  - score the total energy deposition
  //  - compute the radiochemical yields (G values)
  G4VPrimitiveScorer* primitivSpecies = new ScoreSpecies("Species");
  mfDetector->RegisterPrimitive(primitivSpecies);
  G4SDManager::GetSDMpointer()->AddNewDetector(mfDetector); 
  SetSensitiveDetector("World", mfDetector);
}