Detector construction. More...

#include <Doxymodules_persistency.h>

Inheritance diagram for ExP02DetectorConstruction:

Public Member Functions
	ExP02DetectorConstruction ()

	~ExP02DetectorConstruction ()

virtual G4VPhysicalVolume *	Construct ()

Private Attributes
G4LogicalVolume *	fExperimentalHall_log

G4LogicalVolume *	fTracker_log

G4LogicalVolume *	fCalorimeterBlock_log

G4LogicalVolume *	fCalorimeterLayer_log

G4VPhysicalVolume *	fExperimentalHall_phys

G4VPhysicalVolume *	fCalorimeterLayer_phys

G4VPhysicalVolume *	fCalorimeterBlock_phys

G4VPhysicalVolume *	fTracker_phys

Detailed Description

Detector construction.

Definition at line 102 of file Doxymodules_persistency.h.

Constructor & Destructor Documentation

◆ ExP02DetectorConstruction()

ExP02DetectorConstruction::ExP02DetectorConstruction ( )

Definition at line 51 of file ExP02DetectorConstruction.cc.

  :  G4VUserDetectorConstruction(),
    fExperimentalHall_log(0), fTracker_log(0),
    fCalorimeterBlock_log(0), fCalorimeterLayer_log(0),
    fExperimentalHall_phys(0), fCalorimeterLayer_phys(0),
    fCalorimeterBlock_phys(0), fTracker_phys(0)
{;}

◆ ~ExP02DetectorConstruction()

ExP02DetectorConstruction::~ExP02DetectorConstruction ( )

Definition at line 61 of file ExP02DetectorConstruction.cc.

62{

63}

Member Function Documentation

◆ Construct()

G4VPhysicalVolume * ExP02DetectorConstruction::Construct ( )

virtual

Definition at line 67 of file ExP02DetectorConstruction.cc.

{
 
  //------------------------------------------------------ materials
 
  G4double a;  // atomic mass
  G4double z;  // atomic number
  G4double density;
 
  G4Material* Ar = 
  new G4Material("ArgonGas", z= 18., a= 39.95*g/mole, density= 1.782*mg/cm3);
 
  G4Material* Al = 
  new G4Material("Aluminum", z= 13., a= 26.98*g/mole, density= 2.7*g/cm3);
 
  G4Material* Pb = 
  new G4Material("Lead", z= 82., a= 207.19*g/mole, density= 11.35*g/cm3);
 
  //------------------------------------------------------ volumes
 
  //------------------------------ experimental hall (world volume)
  //------------------------------ beam line along x axis
 
  G4double expHall_x = 3.0*m;
  G4double expHall_y = 1.0*m;
  G4double expHall_z = 1.0*m;
  G4Box* experimentalHall_box
    = new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
  fExperimentalHall_log = new G4LogicalVolume(experimentalHall_box,
                                             Ar,"expHall_log",0,0,0);
  fExperimentalHall_phys = new G4PVPlacement(0,G4ThreeVector(),
                                      fExperimentalHall_log,"expHall",0,false,0);
 
  //------------------------------ a tracker tube
 
  G4double innerRadiusOfTheTube = 0.*cm;
  G4double outerRadiusOfTheTube = 60.*cm;
  G4double hightOfTheTube = 50.*cm;
  G4double startAngleOfTheTube = 0.*deg;
  G4double spanningAngleOfTheTube = 360.*deg;
  G4Tubs* tracker_tube = new G4Tubs("tracker_tube",innerRadiusOfTheTube,
                                    outerRadiusOfTheTube,hightOfTheTube,
                                    startAngleOfTheTube,spanningAngleOfTheTube);
  fTracker_log = new G4LogicalVolume(tracker_tube,Al,"tracker_log",0,0,0);
  G4double trackerPos_x = -1.0*m;
  G4double trackerPos_y = 0.*m;
  G4double trackerPos_z = 0.*m;
  fTracker_phys = new G4PVPlacement(0,
             G4ThreeVector(trackerPos_x,trackerPos_y,trackerPos_z),
             fTracker_log,"tracker",fExperimentalHall_log,false,0);
 
  //------------------------------ a calorimeter block
 
  G4double block_x = 1.0*m;
  G4double block_y = 50.0*cm;
  G4double block_z = 50.0*cm;
  G4Box* calorimeterBlock_box = new G4Box("calBlock_box",block_x,
                                          block_y,block_z);
  fCalorimeterBlock_log = new G4LogicalVolume(calorimeterBlock_box,
                                             Pb,"caloBlock_log",0,0,0);
  G4double blockPos_x = 1.0*m;
  G4double blockPos_y = 0.0*m;
  G4double blockPos_z = 0.0*m;
  fCalorimeterBlock_phys = new G4PVPlacement(0,
             G4ThreeVector(blockPos_x,blockPos_y,blockPos_z),
             fCalorimeterBlock_log,"caloBlock",fExperimentalHall_log,false,0);
 
  //------------------------------ calorimeter layers
 
  G4double calo_x = 1.*cm;
  G4double calo_y = 40.*cm;
  G4double calo_z = 40.*cm;
  G4Box* calorimeterLayer_box = new G4Box("caloLayer_box",
                                          calo_x,calo_y,calo_z);
  fCalorimeterLayer_log = new G4LogicalVolume(calorimeterLayer_box,
                                             Al,"caloLayer_log",0,0,0);
  for(G4int i=0;i<19;i++) // loop for 19 layers
  {
    G4double caloPos_x = (i-9)*10.*cm;
    G4double caloPos_y = 0.0*m;
    G4double caloPos_z = 0.0*m;
    fCalorimeterLayer_phys = new G4PVPlacement(0,
               G4ThreeVector(caloPos_x,caloPos_y,caloPos_z),
               fCalorimeterLayer_log,"caloLayer",fCalorimeterBlock_log,false,i);
  }
 
  //------------------------------------------------------------------
 
  // writing the geometry to a ROOT file
 
  // initialize ROOT
  TSystem ts;
 
  gSystem->Load("libExP02ClassesDict");
  
  //  gDebug = 1;
 
  const G4ElementTable* eltab = G4Element::GetElementTable();
 
  ExP02GeoTree* geotree = new ExP02GeoTree(fExperimentalHall_phys, eltab);
 
  TFile fo("geo.root","RECREATE");
 
  fo.WriteObject(geotree, "my_geo");
  
  return fExperimentalHall_phys;
}