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// This example is provided by the Geant4-DNA collaboration
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//
/// \file DetectorConstruction.hh
/// \brief Definition of the DetectorConstruction class

#ifndef DetectorConstruction_h
#define DetectorConstruction_h 1

#include "G4VUserDetectorConstruction.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Box.hh"
#include "G4Sphere.hh"
#include "G4Tubs.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4UserLimits.hh"
#include "G4VisAttributes.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"

class DetectorConstruction : public G4VUserDetectorConstruction
{
public:
  DetectorConstruction();
  ~DetectorConstruction();

  virtual G4VPhysicalVolume* Construct();

private:  
  G4double           fWorldSizeX;
  G4double           fWorldSizeY;
  G4double           fWorldSizeZ;
  G4VPhysicalVolume* fpPhysiWorld;
  G4LogicalVolume*   fpLogicWorld;
  G4Box*             fpSolidWorld;
  G4Tubs*            fpSolidTarget;
  G4Material*        fpWaterMaterial;
  G4Material*        fpTHFMaterial;

  void DefineMaterials();
  G4VPhysicalVolume* ConstructDetector();     
};
#endif
