DetectorConstruction.cc

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//
// $Id: DetectorConstruction.cc,v 1.1 2007-06-21 15:18:32 jjacquem Exp $
// GEANT4 tag $Name: not supported by cvs2svn $
//
// 

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#include "DetectorConstruction.hh"
#include "DetectorMessenger.hh"

#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"

#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"

#include "G4UnitsTable.hh"
#include "G4SystemOfUnits.hh"

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DetectorConstruction::DetectorConstruction()
:pBox(0), aMaterial(0)
{
  BoxSize = 1*mm;
  DefineMaterials();
  SetMaterial("Germanium");  
  detectorMessenger = new DetectorMessenger(this);
}

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DetectorConstruction::~DetectorConstruction()
{ delete detectorMessenger;}

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G4VPhysicalVolume* DetectorConstruction::Construct()
{
  return ConstructVolumes();
}

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void DetectorConstruction::DefineMaterials()
{
  //
  // define Elements
  //
  G4double z,a;
  
  G4Element* H  = new G4Element("Hydrogen" ,"H" , z= 1., a=   1.01*g/mole);
  G4Element* N  = new G4Element("Nitrogen" ,"N" , z= 7., a=  14.01*g/mole);
  G4Element* O  = new G4Element("Oxygen"   ,"O" , z= 8., a=  16.00*g/mole);
  G4Element* Ge = new G4Element("Germanium","Ge", z=32., a=  72.59*g/mole);
  G4Element* Bi = new G4Element("Bismuth"  ,"Bi", z=83., a= 208.98*g/mole);
  
  //
  // define materials
  //
  G4double density;
  G4int ncomponents, natoms;
  G4double fractionmass;  
  
  G4Material* Air = 
  new G4Material("Air", density= 1.290*mg/cm3, ncomponents=2);
  Air->AddElement(N, fractionmass=70.*perCent);
  Air->AddElement(O, fractionmass=30.*perCent);

  G4Material* H2l = 
  new G4Material("H2liquid", density= 70.8*mg/cm3, ncomponents=1);
  H2l->AddElement(H, fractionmass=1.);
  
  G4Material* H2O = 
  new G4Material("Water", density= 1.000*g/cm3, ncomponents=2);
  H2O->AddElement(H, natoms=2);
  H2O->AddElement(O, natoms=1);
  H2O->GetIonisation()->SetMeanExcitationEnergy(75.0*eV);
  
  G4Material* steam = 
  new G4Material("WaterSteam", density= 1.0*mg/cm3, ncomponents=1);
  steam->AddMaterial(H2O, fractionmass=1.);
  steam->GetIonisation()->SetMeanExcitationEnergy(71.6*eV);  
    
  G4Material* BGO = 
  new G4Material("BGO", density= 7.10*g/cm3, ncomponents=3);
  BGO->AddElement(O , natoms=12);
  BGO->AddElement(Ge, natoms= 3);
  BGO->AddElement(Bi, natoms= 4);  
    
  new G4Material("Aluminium"  , z=13., a= 26.98*g/mole, density= 2.700*g/cm3);
  new G4Material("Silicon"    , z=14., a= 28.09*g/mole, density= 2.330*g/cm3);
  new G4Material("liquidArgon", z=18., a= 39.95*g/mole, density= 1.390*g/cm3);  
  new G4Material("Iron"       , z=26., a= 55.85*g/mole, density= 7.870*g/cm3);
  new G4Material("Copper"     , z=29., a= 63.55*g/mole, density= 8.960*g/cm3);
  new G4Material("Germanium"  , z=32., a= 72.61*g/mole, density= 5.323*g/cm3);    
  new G4Material("Silver"     , z=47., a=107.87*g/mole, density= 10.50*g/cm3);
  new G4Material("Tungsten"   , z=74., a=183.85*g/mole, density= 19.30*g/cm3);
  new G4Material("Lead"       , z=82., a=207.19*g/mole, density= 11.35*g/cm3);
  new G4Material("Uranium"    , z=92., a=238.03*g/mole, density= 18.95*g/cm3);
  

  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}

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G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
{
  // Cleanup old geometry
  G4GeometryManager::GetInstance()->OpenGeometry();
  G4PhysicalVolumeStore::GetInstance()->Clean();
  G4LogicalVolumeStore::GetInstance()->Clean();
  G4SolidStore::GetInstance()->Clean();

  G4Box* 
    sBox = new G4Box("Container",           //its name
             BoxSize/2,BoxSize/2,BoxSize/2);    //its dimensions
           
  G4LogicalVolume*
    lBox = new G4LogicalVolume(sBox,            //its shape
                   aMaterial,       //its material
                   aMaterial->GetName());   //its name

  pBox = new G4PVPlacement(0,               //no rotation
               G4ThreeVector(),     //at (0,0,0)
                           lBox,            //its logical volume
                           aMaterial->GetName(),    //its name
                           0,               //its mother  volume
                           false,           //no boolean operation
                           0);              //copy number
                 
  //always return the root volume
  //
  return pBox;
}

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void DetectorConstruction::PrintParameters()
{
  G4cout << "\n The Box is " << G4BestUnit(BoxSize,"Length")
         << " of " << aMaterial->GetName() << G4endl;
}

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#include "G4RunManager.hh"

void DetectorConstruction::SetMaterial(G4String materialChoice)
{
  // search the material by its name, or build it from nist data base
  G4Material* pttoMaterial = 
     G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);

  if (pttoMaterial) {
    aMaterial = pttoMaterial;
    if (pBox) G4RunManager::GetRunManager()
                             ->DefineWorldVolume(ConstructVolumes());
  } else {
    G4cout << "\n--> warning from DetectorConstruction::SetMaterial : "
           << materialChoice << " not found" << G4endl;  
  }  
}

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