Gabriele Cosmo
175 lines
6.5 KiB
C++
175 lines
6.5 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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/// \file persistency/P02/src/ExP02DetectorConstruction.cc
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/// \brief Implementation of the ExP02DetectorConstruction class
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//
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//
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//
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#include "ExP02DetectorConstruction.hh"
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#include "G4Material.hh"
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#include "G4Box.hh"
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#include "G4Tubs.hh"
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#include "G4LogicalVolume.hh"
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#include "G4ThreeVector.hh"
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#include "G4PVPlacement.hh"
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#include "globals.hh"
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#include "G4SystemOfUnits.hh"
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//ROOT
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#include "TROOT.h"
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#include "TFile.h"
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#include "TSystem.h"
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#include "ExP02GeoTree.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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ExP02DetectorConstruction::ExP02DetectorConstruction()
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: G4VUserDetectorConstruction(),
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fExperimentalHall_log(0), fTracker_log(0),
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fCalorimeterBlock_log(0), fCalorimeterLayer_log(0),
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fExperimentalHall_phys(0), fCalorimeterLayer_phys(0),
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fCalorimeterBlock_phys(0), fTracker_phys(0)
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{;}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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ExP02DetectorConstruction::~ExP02DetectorConstruction()
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{
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VPhysicalVolume* ExP02DetectorConstruction::Construct()
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{
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//------------------------------------------------------ materials
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G4double a; // atomic mass
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G4double z; // atomic number
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G4double density;
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G4Material* Ar =
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new G4Material("ArgonGas", z= 18., a= 39.95*g/mole, density= 1.782*mg/cm3);
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G4Material* Al =
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new G4Material("Aluminum", z= 13., a= 26.98*g/mole, density= 2.7*g/cm3);
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G4Material* Pb =
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new G4Material("Lead", z= 82., a= 207.19*g/mole, density= 11.35*g/cm3);
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//------------------------------------------------------ volumes
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//------------------------------ experimental hall (world volume)
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//------------------------------ beam line along x axis
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G4double expHall_x = 3.0*m;
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G4double expHall_y = 1.0*m;
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G4double expHall_z = 1.0*m;
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G4Box* experimentalHall_box
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= new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
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fExperimentalHall_log = new G4LogicalVolume(experimentalHall_box,
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Ar,"expHall_log",0,0,0);
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fExperimentalHall_phys = new G4PVPlacement(0,G4ThreeVector(),
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fExperimentalHall_log,"expHall",0,false,0);
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//------------------------------ a tracker tube
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G4double innerRadiusOfTheTube = 0.*cm;
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G4double outerRadiusOfTheTube = 60.*cm;
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G4double hightOfTheTube = 50.*cm;
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G4double startAngleOfTheTube = 0.*deg;
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G4double spanningAngleOfTheTube = 360.*deg;
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G4Tubs* tracker_tube = new G4Tubs("tracker_tube",innerRadiusOfTheTube,
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outerRadiusOfTheTube,hightOfTheTube,
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startAngleOfTheTube,spanningAngleOfTheTube);
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fTracker_log = new G4LogicalVolume(tracker_tube,Al,"tracker_log",0,0,0);
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G4double trackerPos_x = -1.0*m;
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G4double trackerPos_y = 0.*m;
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G4double trackerPos_z = 0.*m;
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fTracker_phys = new G4PVPlacement(0,
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G4ThreeVector(trackerPos_x,trackerPos_y,trackerPos_z),
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fTracker_log,"tracker",fExperimentalHall_log,false,0);
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//------------------------------ a calorimeter block
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G4double block_x = 1.0*m;
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G4double block_y = 50.0*cm;
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G4double block_z = 50.0*cm;
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G4Box* calorimeterBlock_box = new G4Box("calBlock_box",block_x,
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block_y,block_z);
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fCalorimeterBlock_log = new G4LogicalVolume(calorimeterBlock_box,
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Pb,"caloBlock_log",0,0,0);
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G4double blockPos_x = 1.0*m;
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G4double blockPos_y = 0.0*m;
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G4double blockPos_z = 0.0*m;
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fCalorimeterBlock_phys = new G4PVPlacement(0,
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G4ThreeVector(blockPos_x,blockPos_y,blockPos_z),
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fCalorimeterBlock_log,"caloBlock",fExperimentalHall_log,false,0);
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//------------------------------ calorimeter layers
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G4double calo_x = 1.*cm;
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G4double calo_y = 40.*cm;
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G4double calo_z = 40.*cm;
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G4Box* calorimeterLayer_box = new G4Box("caloLayer_box",
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calo_x,calo_y,calo_z);
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fCalorimeterLayer_log = new G4LogicalVolume(calorimeterLayer_box,
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Al,"caloLayer_log",0,0,0);
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for(G4int i=0;i<19;i++) // loop for 19 layers
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{
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G4double caloPos_x = (i-9)*10.*cm;
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G4double caloPos_y = 0.0*m;
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G4double caloPos_z = 0.0*m;
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fCalorimeterLayer_phys = new G4PVPlacement(0,
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G4ThreeVector(caloPos_x,caloPos_y,caloPos_z),
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fCalorimeterLayer_log,"caloLayer",fCalorimeterBlock_log,false,i);
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}
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//------------------------------------------------------------------
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// writing the geometry to a ROOT file
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// initialize ROOT
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TSystem ts;
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gSystem->Load("libExP02ClassesDict");
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// gDebug = 1;
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const G4ElementTable* eltab = G4Element::GetElementTable();
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ExP02GeoTree* geotree = new ExP02GeoTree(fExperimentalHall_phys, eltab);
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TFile fo("geo.root","RECREATE");
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fo.WriteObject(geotree, "my_geo");
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return fExperimentalHall_phys;
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}
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