GB03DetectorConstruction.cc

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// $Id$
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#include "GB03DetectorConstruction.hh"

#include "G4RunManager.hh"

#include "G4Material.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"

#include "G4VisAttributes.hh"
#include "G4Colour.hh"

#include "G4SDManager.hh"
#include "G4MultiFunctionalDetector.hh"
#include "G4PSEnergyDeposit.hh"
#include "G4PSFlatSurfaceFlux.hh"
#include "G4SDNeutralFilter.hh"
#include "G4SDChargedFilter.hh"
#include "G4ios.hh"

#include "GB03DetectorMessenger.hh"

#include "GB03BOptrGeometryBasedBiasing.hh"

#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

G4int GB03DetectorConstruction::fNumberOfLayers = 40;
G4ThreadLocal G4bool GB03DetectorConstruction::fConstructedSDandField = false;

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GB03DetectorConstruction::GB03DetectorConstruction()
: G4VUserDetectorConstruction(),
  fTotalThickness (2.0*m), fLayerThickness(0.),
  fConstructed(false), 
  fWorldMaterial(0), fAbsorberMaterial(0), fGapMaterial(0),
  fLayerSolid(0), fGapSolid(0),
  fWorldLogical(0), fCalorLogical(0), fLayerLogical(0), fGapLogical(0),
  fWorldPhysical(0), fCalorPhysical(0), fLayerPhysical(0), fGapPhysical(0),
  fDetectorMessenger(0), fVerboseLevel(1)
{
  fLayerThickness = fTotalThickness / fNumberOfLayers;
  fCalName = "Calor";
  fDetectorMessenger = new GB03DetectorMessenger(this);
}

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GB03DetectorConstruction::~GB03DetectorConstruction()
{ delete fDetectorMessenger;}

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G4VPhysicalVolume* GB03DetectorConstruction::Construct()
{
  if(!fConstructed)
  {
    fConstructed = true;
    DefineMaterials();
    SetupGeometry();
  }
  if (GetVerboseLevel()>0)
  { PrintCalorParameters(); }

  return fWorldPhysical;
}

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void GB03DetectorConstruction::ConstructSDandField()
{
  if(!fConstructedSDandField)
  {
    fConstructedSDandField = true;
    SetupDetectors();
    SetupBiasing();
  }
}

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void GB03DetectorConstruction::DefineMaterials()
{ 
  G4String name, symbol;             //a=mass of a mole;
  G4double a, z, density;            //z=mean number of protons;  
  G4int iz;                          //iz=number of protons  in an isotope; 
  G4int n;                           // n=number of nucleons in an isotope;

  G4int ncomponents, natoms;
  G4double abundance, fractionmass;
  G4double temperature, pressure;

  //
  // define Elements
  //

  a = 1.01*g/mole;
  G4Element* H  = new G4Element(name="Hydrogen",symbol="H" , z= 1., a);

  a = 12.01*g/mole;
  G4Element* C  = new G4Element(name="Carbon"  ,symbol="C" , z= 6., a);

  a = 14.01*g/mole;
  G4Element* N  = new G4Element(name="Nitrogen",symbol="N" , z= 7., a);

  a = 16.00*g/mole;
  G4Element* O  = new G4Element(name="Oxygen"  ,symbol="O" , z= 8., a);

  //
  // define an Element from isotopes, by relative abundance 
  //

  G4Isotope* U5 = new G4Isotope(name="U235", iz=92, n=235, a=235.01*g/mole);
  G4Isotope* U8 = new G4Isotope(name="U238", iz=92, n=238, a=238.03*g/mole);

  G4Element* U  = new G4Element(name="enriched Uranium",symbol="U",ncomponents=2);
  U->AddIsotope(U5, abundance= 90.*perCent);
  U->AddIsotope(U8, abundance= 10.*perCent);

  //
  // define simple materials
  //

  new G4Material(name="Aluminium", z=13., a=26.98*g/mole, density=2.700*g/cm3);
  new G4Material(name="Silicon", z=14., a= 28.09*g/mole, density= 2.33*g/cm3);
  new G4Material(name="Iron", z=26., a=55.85*g/mole, density=7.87*g/cm3);
  new G4Material(name="ArgonGas",z=18., a= 39.95*g/mole, density=1.782*mg/cm3);
  new G4Material(name="He", z=2., a=4.0*g/mole, density=0.1786e-03*g/cm3);

  density = 1.390*g/cm3;
  a = 39.95*g/mole;
  new G4Material(name="liquidArgon", z=18., a, density);

  density = 11.35*g/cm3;
  a = 207.19*g/mole;
  G4Material* Pb = new G4Material(name="Lead"     , z=82., a, density);

  //
  // define a material from elements.   case 1: chemical molecule
  //
 
  density = 1.000*g/cm3;
  G4Material* H2O = new G4Material(name="Water", density, ncomponents=2);
  H2O->AddElement(H, natoms=2);
  H2O->AddElement(O, natoms=1);

  density = 1.032*g/cm3;
  G4Material* Sci = new G4Material(name="Scintillator", density, ncomponents=2);
  Sci->AddElement(C, natoms=9);
  Sci->AddElement(H, natoms=10);

  //
  // define a material from elements.   case 2: mixture by fractional mass
  //

  density = 1.290*mg/cm3;
  G4Material* Air = new G4Material(name="Air"  , density, ncomponents=2);
  Air->AddElement(N, fractionmass=0.7);
  Air->AddElement(O, fractionmass=0.3);

  //
  // examples of vacuum
  //

  density     = universe_mean_density;
  pressure    = 3.e-18*pascal;
  temperature = 2.73*kelvin;
  G4Material* Vacuum = new G4Material(name="Galactic", z=1., a=1.01*g/mole,
                                    density,kStateGas,temperature,pressure);

  if (GetVerboseLevel()>1) {
    G4cout << *(G4Material::GetMaterialTable()) << G4endl;
  }

  //default materials of the calorimeter
  fWorldMaterial    = Vacuum;
  fAbsorberMaterial = Pb;
  fGapMaterial      = Sci;
}

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void GB03DetectorConstruction::SetupGeometry()
{
  //     
  // World
  //
  G4VSolid* worldSolid = new G4Box("World",2.*m,2.*m,fTotalThickness*2.);
  fWorldLogical = new G4LogicalVolume(worldSolid,fWorldMaterial,"World");
  fWorldPhysical = new G4PVPlacement(0,G4ThreeVector(),fWorldLogical,"World",
                        0,false,0);
  
  //                               
  // Calorimeter
  //  
  G4VSolid* calorSolid = new G4Box("Calor",0.5*m,0.5*m,fTotalThickness/2.);
  fCalorLogical = new G4LogicalVolume(calorSolid,fAbsorberMaterial,fCalName);
  fCalorPhysical = new G4PVPlacement(0, G4ThreeVector(0.,0.,0.),
                       fCalorLogical,fCalName,fWorldLogical,false,0);
 
  //                                 
  // Layers --- as absorbers
  //
  fLayerSolid = new G4Box("Layer",0.5*m,0.5*m,fLayerThickness/2.);
  fLayerLogical
      = new G4LogicalVolume(fLayerSolid,fAbsorberMaterial,fCalName+"_LayerLog");
  fLayerPhysical
      = new G4PVReplica(fCalName+"_Layer",fLayerLogical,fCalorLogical,
                        kZAxis,fNumberOfLayers,fLayerThickness);
   
  //
  // Gap
  //
  fGapSolid = new G4Box("Gap",0.5*m,0.5*m,fLayerThickness/4.);
  fGapLogical = new G4LogicalVolume(fGapSolid,fGapMaterial,fCalName+"_Gap");
  fGapPhysical = new G4PVPlacement(0,G4ThreeVector(0.,0.,fLayerThickness/4.),
                fGapLogical,fCalName+"_gap",fLayerLogical,false,0);

  //                                        
  // Visualization attributes
  //
  fWorldLogical->SetVisAttributes(G4VisAttributes::GetInvisible());
  G4VisAttributes* simpleBoxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
  simpleBoxVisAtt->SetVisibility(true);
  fCalorLogical->SetVisAttributes(simpleBoxVisAtt);
  fLayerLogical->SetVisAttributes(simpleBoxVisAtt);
  fGapLogical->SetVisAttributes(simpleBoxVisAtt);
  
}

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void GB03DetectorConstruction::SetupDetectors()
{
  G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
  G4String filterName;

  G4SDNeutralFilter* neutralFilter
    = new G4SDNeutralFilter(filterName="neutralFilter");
  G4SDChargedFilter* chargedFilter
    = new G4SDChargedFilter(filterName="chargedFilter");

  for(G4int j=0;j<2;j++)
  {
    // Loop counter j = 0 : absorber
    //                = 1 : gap
    G4String detName = fCalName;
    if(j==0)
    { detName += "_abs"; }
    else
    { detName += "_gap"; }
    G4MultiFunctionalDetector* det = new G4MultiFunctionalDetector(detName);
    G4SDManager::GetSDMpointer()->AddNewDetector(det);
    // The second argument in each primitive means the "level" of geometrical 
    // hierarchy, the copy number of that level is used as the key of the 
    // G4THitsMap.
    // For absorber (j = 0), the copy number of its own physical volume is used.
    // For gap (j = 1), the copy number of its mother physical volume is used, 
    // since there is only one physical volume of gap is placed with respect 
    // to its mother.
    G4VPrimitiveScorer* primitive;
    primitive = new G4PSEnergyDeposit("eDep",j);
    det->RegisterPrimitive(primitive);
    primitive = new G4PSFlatSurfaceFlux("nNeutral",1,j);
    primitive->SetFilter(neutralFilter);
    det->RegisterPrimitive(primitive);
    primitive = new G4PSFlatSurfaceFlux("nCharged",1,j);
    primitive->SetFilter(chargedFilter);
    det->RegisterPrimitive(primitive);

    if(j==0)
    { SetSensitiveDetector(fLayerLogical, det); }
    else
    { SetSensitiveDetector(fGapLogical, det);}
   
  }
  G4SDManager::GetSDMpointer()->SetVerboseLevel(0);
}

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void GB03DetectorConstruction::SetupBiasing()
{
  GB03BOptrGeometryBasedBiasing* biasingOperator = new GB03BOptrGeometryBasedBiasing();
  biasingOperator->AttachTo(fLayerLogical);
}

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void GB03DetectorConstruction::PrintCalorParameters() const
{
  G4cout 
    << "--------------------------------------------------------" << G4endl;
  G4cout 
    << " Absorber is made of " << fAbsorberMaterial->GetName() << G4endl
    << " Gap is made of " << fGapMaterial->GetName() << G4endl
    << "--------------------------------------------------------" << G4endl;
}

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void GB03DetectorConstruction::SetAbsorberMaterial(G4String materialChoice)
{
  // search the material by its name   
  G4Material* pttoMaterial = G4Material::GetMaterial(materialChoice);     
  if(pttoMaterial)
  {
    fAbsorberMaterial = pttoMaterial;
    if(fConstructed) 
    {
      fCalorLogical->SetMaterial(fAbsorberMaterial);
      fLayerLogical->SetMaterial(fAbsorberMaterial);
    }
    G4RunManager::GetRunManager()->GeometryHasBeenModified();
    if (GetVerboseLevel()>1) {
      PrintCalorParameters();
    }
  }
  else
  { 
    G4cerr 
      << materialChoice << " is not defined. - Command is ignored." << G4endl; 
  }
}

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G4String GB03DetectorConstruction::GetAbsorberMaterial() const
{ return fAbsorberMaterial->GetName(); }

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void GB03DetectorConstruction::SetGapMaterial(G4String materialChoice)
{
  // search the material by its name 
  G4Material* pttoMaterial = G4Material::GetMaterial(materialChoice);  
  if(pttoMaterial)
  {
    fGapMaterial = pttoMaterial;
    if(fConstructed) 
    { fGapLogical->SetMaterial(fGapMaterial); }
    G4RunManager::GetRunManager()->GeometryHasBeenModified();
    if (GetVerboseLevel()>1) {
      PrintCalorParameters();
    }
  }
  else
  { 
    G4cerr 
      << materialChoice << " is not defined. - Command is ignored." << G4endl; 
  }
}

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G4String GB03DetectorConstruction::GetGapMaterial() const
{ return fGapMaterial->GetName(); }

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void GB03DetectorConstruction::SetNumberOfLayers(G4int nl)
{
  fNumberOfLayers = nl;
  fLayerThickness = fTotalThickness/fNumberOfLayers;
  if(!fConstructed) return;

  fLayerSolid->SetZHalfLength(fLayerThickness/2.);
  fGapSolid->SetZHalfLength(fLayerThickness/4.);

  fCalorLogical->RemoveDaughter(fLayerPhysical);
  delete fLayerPhysical;
  fLayerPhysical 
      = new G4PVReplica(fCalName+"_Layer",fLayerLogical,fCalorLogical,
                        kZAxis,fNumberOfLayers,fLayerThickness);
  fGapPhysical->SetTranslation(G4ThreeVector(0.,0.,fLayerThickness/4.));
  
  G4RunManager::GetRunManager()->GeometryHasBeenModified();
}

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