ExN05DetectorConstruction.cc

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// $Id$
//
#include "ExN05DetectorConstruction.hh"
#include "ExN05CalorimeterSD.hh"
#include "ExN05EMShowerModel.hh"
#include "ExN05PiModel.hh"

#include "G4Material.hh"
#include "G4MaterialTable.hh"
#include "G4Element.hh"
#include "G4ProductionCuts.hh"
#include "G4ElementTable.hh"
#include "G4Box.hh"
#include "G4Tubs.hh"
#include "G4LogicalVolume.hh"
#include "G4ThreeVector.hh"
#include "G4PVPlacement.hh"
#include "G4SDManager.hh"
#include "G4VisAttributes.hh"
#include "G4Colour.hh"
#include "G4SystemOfUnits.hh"

ExN05DetectorConstruction::ExN05DetectorConstruction()
{;}

ExN05DetectorConstruction::~ExN05DetectorConstruction()
{;}

G4VPhysicalVolume* ExN05DetectorConstruction::Construct()
{
  G4cout << "\nExN05DetectorConstruction....\n" << G4endl;
  
  //--------- Material definition ---------
  
  G4double a, iz, z, density;
  G4String name, symbol;
  G4int nel;
  
  a = 14.01*g/mole;
  G4Element* elN = new G4Element(name="Nitrogen", symbol="N",  iz=7.,  a);
  a = 16.00*g/mole;
  G4Element* elO = new G4Element(name="Oxigen",   symbol="O",  iz=8.,  a);
  a = 126.9*g/mole;
  G4Element* elI = new G4Element(name="Iodine",   symbol="I",  iz=53., a);
  a = 132.9*g/mole;
  G4Element* elCs= new G4Element(name="Cesium",   symbol="Cs", iz=55., a);

  
  density = 4.51*g/cm3;
  G4Material* CsI = new G4Material(name="CsI", density, nel = 2);
  CsI->AddElement(elI, .5);
  CsI->AddElement(elCs,.5);
  a = 4.0*g/mole;
  density = 0.1786e-03*g/cm3;
  G4Material* He  = new G4Material(name="He", z=2., a, density);
  
  a = 55.85*g/mole;
  density = 7.87*g/cm3;
  G4Material* Fe = new G4Material(name="Fer", z=26., a, density);
  density = 1.29e-03*g/cm3;
  G4Material* Air = new G4Material(name="Air", density, nel=2);
  Air->AddElement(elN, .7);
  Air->AddElement(elO, .3);
  
  //--------- G4VSolid, G4LogicalVolume, G4VPhysicalVolume  ---------
  
  //--------------
  // World:
  //--------------
  G4Box *WorldBox= new G4Box("WorldBox",400*cm, 400*cm, 400*cm);
  G4LogicalVolume *WorldLog=new G4LogicalVolume(WorldBox,Air,
                                                "WorldLogical", 0, 0, 0);
  G4PVPlacement *WorldPhys=new G4PVPlacement(0,G4ThreeVector(),
                                             "WorldPhysical",
                                             WorldLog,
                                             0,false,0);
  // Size of detectors:
  G4double detectSize = 125*cm;
  
  //-----------------------------
  // "Drift Chamber":
  // Not used in parameterisation.
  //-----------------------------
  // -- Logical volume:
  G4Box *driftChamberBox
    = new G4Box("DriftChamberSolid", detectSize, detectSize, 40*cm);
  G4LogicalVolume *driftChamberLog
    = new G4LogicalVolume(driftChamberBox,He,
                          "DriftChamberLogical", 0, 0, 0);
  // -- Placement:
  // G4PVPlacement *driftChamberPhys  =
      new G4PVPlacement(0,G4ThreeVector(0., 0., 50*cm),
                        "DriftChamberPhysical",
                        driftChamberLog,
                        WorldPhys,false,0);
  
  //--------------------------
  // "Calorimeter": used in
  // parameterisation below
  //--------------------------
  // -- Logical volume:
  G4Box *calorimeterBox
    = new G4Box("CalorimeterSolid", detectSize, detectSize, 20*cm);
  G4LogicalVolume *calorimeterLog = new G4LogicalVolume(calorimeterBox,Air,
                                                        "CalorimeterLogical", 0, 0, 0);
  // -- Placement:
  G4PVPlacement *calorimeterPhys  = new G4PVPlacement(0,G4ThreeVector(0., 0., 120*cm),
                                                      "CalorimeterPhysical",
                                                      calorimeterLog,
                                                      WorldPhys,false,0);
  
  //--------------------------------------
  // The calorimeter is filled with
  // crystals:
  //--------------------------------------
  // -- Logical volume:
  G4double CrystalX = 2.5*cm;
  G4double CrystalY = CrystalX;
  G4double CrystalZ = 20*cm;
  G4Box *CrystalSolid = new G4Box("CrystalSolid", CrystalX, CrystalY, CrystalZ);
  theCrystalLog       = new G4LogicalVolume(CrystalSolid,CsI,
                                            "CrystalLogical", 0, 0, 0);
  
  G4String tName1("Crystal");        // Allow all target physicals to share
  // same name (delayed copy)
  
  // -- and placements inside the calorimeter:
  G4int copyNo=0;
  G4double xTlate, yTlate;
  G4int nX = 48;
  G4int nY = 48;
  for (G4int j = 0; j < nY; j++)
    {
      yTlate = -detectSize + 3*CrystalY + j*2*CrystalY;
      for (G4int i = 0; i < nX; i++)
        {
          xTlate = -detectSize + 3*CrystalX + i*2*CrystalX;
          new G4PVPlacement(0,G4ThreeVector(xTlate,yTlate,0*cm),
                            tName1,
                            theCrystalLog,
                            calorimeterPhys,false,copyNo++);
        }
    }


  //--------------------------
  // "Hadron Calorimeter": used
  // in parameterisation with
  // a parallel geometry
  //--------------------------
  // -- Logical volume:
  G4Box *hadCaloBox
    = new G4Box("HadCaloSolid", detectSize, detectSize, 50*cm);
  G4LogicalVolume *hadCaloLog = new G4LogicalVolume(hadCaloBox,Air,
                                                     "HadCaloLogical", 0, 0, 0);
  // -- Placement:
  G4PVPlacement *hadCaloPhys  = new G4PVPlacement(0,G4ThreeVector(0., 0., 200*cm),
                                                   "HadCaloPhysical",
                                                   hadCaloLog,
                                                   WorldPhys,false,0);
  
  //--------------------------------------
  // The calorimeter is filled with
  // towers:
  //--------------------------------------
  // -- Logical volume:
  G4double TowerX = 5*cm;
  G4double TowerY = TowerX;
  G4double TowerZ = 45*cm;
  G4Box *TowerSolid = new G4Box("TowerSolid", TowerX, TowerY, TowerZ);
  theTowerLog       = new G4LogicalVolume(TowerSolid,Fe,
                                          "TowerLogical", 0, 0, 0);
  
  G4String tName2("Tower");
  
  // -- and placements inside the calorimeter:
  copyNo=0;
  G4int nXhad = 23;
  G4int nYhad = 23;
  for (G4int jj = 0; jj < nYhad; jj++)
    {
      yTlate = -detectSize + 3*TowerY + jj*2*TowerY;
      for (G4int i = 0; i < nXhad; i++)
         {
          xTlate = -detectSize + 3*TowerX + i*2*TowerX;
           new G4PVPlacement(0,G4ThreeVector(xTlate,yTlate,0*cm),
                             tName2,
                             theTowerLog,
                             hadCaloPhys,false,copyNo++);
         }
    }
  
  
  //--------- Sensitive detector -------------------------------------
  G4SDManager* SDman = G4SDManager::GetSDMpointer();
  G4String calorimeterSDname = "ExN05/Calorimeter";
  ExN05CalorimeterSD* CalorimeterSD = new ExN05CalorimeterSD( calorimeterSDname, nX*nY, "CalCollection" );
  SDman->AddNewDetector( CalorimeterSD );
  theCrystalLog->SetSensitiveDetector(CalorimeterSD); 

   G4String hadCalorimeterSDname = "ExN05/HadronCalorimeter";
   ExN05CalorimeterSD* HadCalorimeterSD = new ExN05CalorimeterSD( hadCalorimeterSDname, nXhad*nYhad, "HadCollection" );
   SDman->AddNewDetector( HadCalorimeterSD );
   theTowerLog->SetSensitiveDetector(HadCalorimeterSD); 
  
  //------------------ Parameterisation Models --------------------------
  // -- Makes the calorimeterLog volume becoming a G4Region: 
   G4Region* caloRegion = new G4Region("EM_calo_region");
   caloRegion->AddRootLogicalVolume(calorimeterLog);
   std::vector<double> cuts; 
   cuts.push_back(1.0*mm);cuts.push_back(1.0*mm);cuts.push_back(1.0*mm);cuts.push_back(1.0*mm);
   caloRegion->SetProductionCuts(new G4ProductionCuts());
   caloRegion->GetProductionCuts()->SetProductionCuts(cuts);
  // builds a model and sets it to the envelope of the calorimeter:
   new ExN05EMShowerModel("emShowerModel",caloRegion);
   // -- uncomment for seeing warning message with /param/showSetup command  new ExN05PiModel(caloRegion);

   // ---------------- Makes had. calo a region too ------------------
   G4Region* hadRegion = new G4Region("HAD_calo_region");
   hadRegion->AddRootLogicalVolume(hadCaloLog);
   cuts.clear();
   cuts.push_back(1.0*cm);cuts.push_back(1.0*cm);cuts.push_back(1.0*cm);cuts.push_back(1.0*cm);
   hadRegion->SetProductionCuts(new G4ProductionCuts());
   hadRegion->GetProductionCuts()->SetProductionCuts(cuts);

  //--------- Visualization attributes -------------------------------
  WorldLog->SetVisAttributes(G4VisAttributes::Invisible);

  G4VisAttributes * driftchamberTubeVisAtt
    = new G4VisAttributes(G4Colour(0.0,1.0,0.0));
  driftchamberTubeVisAtt->SetForceWireframe(true);
  driftChamberLog->SetVisAttributes(driftchamberTubeVisAtt);
  
  G4VisAttributes * calorimeterBoxVisAtt
    = new G4VisAttributes(G4Colour(0.0,0.0,1.0));
  calorimeterBoxVisAtt->SetForceWireframe(true);
  calorimeterLog->SetVisAttributes(calorimeterBoxVisAtt);
  
  G4VisAttributes * crystalVisAtt
    = new G4VisAttributes(G4Colour(1.0,0.0,0.0));
  crystalVisAtt->SetForceWireframe(true);
  theCrystalLog->SetVisAttributes(crystalVisAtt);

  G4VisAttributes * hadCaloBoxVisAtt
    = new G4VisAttributes(G4Colour(1.0,0.0,1.0));
  hadCaloBoxVisAtt->SetForceWireframe(true);
  hadCaloLog->SetVisAttributes(hadCaloBoxVisAtt);
  
  G4VisAttributes * towerVisAtt
    = new G4VisAttributes(G4Colour(0.5,0.0,1.0));
  towerVisAtt->SetForceWireframe(true);
  theTowerLog->SetVisAttributes(towerVisAtt);
  
  //------------------------------------------------------------------
  
  
  //-----------------------
  // Returns the pointer to
  // the physical world:
  //-----------------------
  return WorldPhys;
}