XDetectorConstruction.cc

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// $Id: XDetectorConstruction.cc 84197 2014-10-10 14:33:03Z gcosmo $
//
// 20141006  For MT compatibility, move SD handling to ConstructSDandField()

#include "XDetectorConstruction.hh"

#include "G4Material.hh"
#include "G4NistManager.hh"

#include "G4Box.hh"
#include "G4Tubs.hh"
#include "G4Sphere.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4VisAttributes.hh"
#include "G4Colour.hh"
#include "G4SDManager.hh"

#include "XAluminumElectrodeSensitivity.hh"
#include "G4LatticePhysical.hh"
#include "G4LatticeLogical.hh"
#include "G4LatticeManager.hh"

#include "G4UserLimits.hh"
#include "G4SystemOfUnits.hh"
#include "G4ios.hh"


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XDetectorConstruction::XDetectorConstruction()
 : fConstructed(false), fIfField(false) {
  fLiquidHelium = NULL;
  fGermanium = NULL;
  fAluminum = NULL;
  fTungsten = NULL;
  fWorldPhys = NULL;
}

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XDetectorConstruction::~XDetectorConstruction() {;}

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G4VPhysicalVolume* XDetectorConstruction::Construct()
{
  if(!fConstructed)
  { 
    fConstructed = true;
    DefineMaterials();
    SetupGeometry();
  }
  return fWorldPhys;
}

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void XDetectorConstruction::DefineMaterials()
{ 
  G4NistManager* nistManager = G4NistManager::Instance();

  fLiquidHelium = nistManager->FindOrBuildMaterial("G4_AIR"); // to be corrected
  fGermanium = nistManager->FindOrBuildMaterial("G4_Ge");
  fAluminum = nistManager->FindOrBuildMaterial("G4_Al");
  fTungsten = nistManager->FindOrBuildMaterial("G4_W");
}

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void XDetectorConstruction::SetupGeometry()
{
  //     
  // World
  //
  G4VSolid* worldSolid = new G4Box("World",16.*cm,16.*cm,16.*cm);
  G4LogicalVolume* worldLogical =
    new G4LogicalVolume(worldSolid,fLiquidHelium,"World");
  worldLogical->SetUserLimits(new G4UserLimits(10*mm, DBL_MAX, DBL_MAX, 0, 0));
  fWorldPhys = new G4PVPlacement(0,G4ThreeVector(),worldLogical,"World",0,
                                 false,0);
  
  //                               
  // Germanium cylinder - this is the volume in which we will propagate phonons
  //  
  G4VSolid* fGermaniumSolid = new G4Tubs("fGermaniumSolid",0.*cm,3.81*cm,
                                         1.27*cm, 0.*deg, 360.*deg);
  G4LogicalVolume* fGermaniumLogical =
    new G4LogicalVolume(fGermaniumSolid,fGermanium,"fGermaniumLogical");
  G4VPhysicalVolume* GePhys =
    new G4PVPlacement(0,G4ThreeVector(),fGermaniumLogical,"fGermaniumPhysical",
                      worldLogical,false,0);

  //
  //Germanium lattice information
  //

  // G4LatticeManager gives physics processes access to lattices by volume
  G4LatticeManager* LM = G4LatticeManager::GetLatticeManager();
  G4LatticeLogical* GeLogical = LM->LoadLattice(fGermanium, "Ge");

  // G4LatticePhysical assigns G4LatticeLogical a physical orientation
  G4LatticePhysical* GePhysical =
    new G4LatticePhysical(GeLogical, GePhys->GetFrameRotation());
  LM->RegisterLattice(GePhys, GePhysical);

  // NOTE:  Above registration can also be done in single step:
  // G4LatticlePhysical* GePhysical = LM->LoadLattice(GePhys, "Ge");

  //
  // Aluminum - crystal end caps. This is where phonon hits are registered
  //
  G4VSolid* fAluminumSolid = new G4Tubs("aluminiumSolid",0.*cm,3.81*cm,0.01*cm,
                                        0.*deg, 360.*deg);

  G4LogicalVolume* fAluminumLogical =
    new G4LogicalVolume(fAluminumSolid,fAluminum,"fAluminumLogical");
  new G4PVPlacement(0,G4ThreeVector(0.,0.,1.28*cm),fAluminumLogical,
                    "fAluminumPhysical",worldLogical,false,0);
  new G4PVPlacement(0,G4ThreeVector(0.,0.,-1.28*cm),fAluminumLogical,
                    "fAluminumPhysical",worldLogical,false,1);

  //                                        
  // Visualization attributes
  //
  worldLogical->SetVisAttributes(G4VisAttributes::Invisible);
  G4VisAttributes* simpleBoxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
  simpleBoxVisAtt->SetVisibility(true);
  fGermaniumLogical->SetVisAttributes(simpleBoxVisAtt);
  fAluminumLogical->SetVisAttributes(simpleBoxVisAtt);
}

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void XDetectorConstruction::ConstructSDandField() { 
  //
  // detector -- Note : Aluminum electrode sensitivity is attached to Germanium 
  //
  XAluminumElectrodeSensitivity* electrodeSensitivity =
    new XAluminumElectrodeSensitivity("XAluminumElectrode");

  SetSensitiveDetector("fGermaniumLogical", electrodeSensitivity);
}

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