B4cDetectorConstruction Class Reference

#include <B4cDetectorConstruction.hh>

Inheritance diagram for B4cDetectorConstruction:

Collaboration diagram for B4cDetectorConstruction:

Public Member Functions
	B4cDetectorConstruction ()
virtual	~B4cDetectorConstruction ()
virtual G4VPhysicalVolume *	Construct ()
virtual void	ConstructSDandField ()
Public Member Functions inherited from G4VUserDetectorConstruction
	G4VUserDetectorConstruction ()
virtual	~G4VUserDetectorConstruction ()
virtual void	CloneSD ()
virtual void	CloneF ()
void	RegisterParallelWorld (G4VUserParallelWorld *)
G4int	ConstructParallelGeometries ()
void	ConstructParallelSD ()
G4int	GetNumberOfParallelWorld () const
G4VUserParallelWorld *	GetParallelWorld (G4int i) const

Private Member Functions
void	DefineMaterials ()
G4VPhysicalVolume *	DefineVolumes ()

Private Attributes
G4bool	fCheckOverlaps
G4int	fNofLayers

Static Private Attributes
static G4ThreadLocal G4GlobalMagFieldMessenger *	fMagFieldMessenger = 0

Additional Inherited Members
Protected Member Functions inherited from G4VUserDetectorConstruction
void	SetSensitiveDetector (const G4String &logVolName, G4VSensitiveDetector *aSD, G4bool multi=false)
void	SetSensitiveDetector (G4LogicalVolume *logVol, G4VSensitiveDetector *aSD)

Detailed Description

Detector construction class to define materials and geometry. The calorimeter is a box made of a given number of layers. A layer consists of an absorber plate and of a detection gap. The layer is replicated.

Four parameters define the geometry of the calorimeter :

• the thickness of an absorber plate,
• the thickness of a gap,
• the number of layers,
• the transverse size of the calorimeter (the input face is a square).

In ConstructSDandField() sensitive detectors of B4cCalorimeterSD type are created and associated with the Absorber and Gap volumes. In addition a transverse uniform magnetic field is defined via G4GlobalMagFieldMessenger class.

Definition at line 56 of file B4cDetectorConstruction.hh.

Constructor & Destructor Documentation

B4cDetectorConstruction()

B4cDetectorConstruction::B4cDetectorConstruction

(

)

Definition at line 58 of file B4cDetectorConstruction.cc.

 : G4VUserDetectorConstruction(),
   fCheckOverlaps(true),
   fNofLayers(-1)
{
}

~B4cDetectorConstruction()

B4cDetectorConstruction::~B4cDetectorConstruction ( )

virtual

Definition at line 67 of file B4cDetectorConstruction.cc.

{ 
}  

Member Function Documentation

Construct()

G4VPhysicalVolume * B4cDetectorConstruction::Construct ( void  )

virtual

Implements G4VUserDetectorConstruction.

Definition at line 73 of file B4cDetectorConstruction.cc.

{
  // Define materials 
  DefineMaterials();
  
  // Define volumes
  return DefineVolumes();
}

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ConstructSDandField()

void B4cDetectorConstruction::ConstructSDandField ( )

virtual

Reimplemented from G4VUserDetectorConstruction.

Definition at line 275 of file B4cDetectorConstruction.cc.

{
  // G4SDManager::GetSDMpointer()->SetVerboseLevel(1);

  // 
  // Sensitive detectors
  //
  B4cCalorimeterSD* absoSD 
    = new B4cCalorimeterSD("AbsorberSD", "AbsorberHitsCollection", fNofLayers);
  SetSensitiveDetector("AbsoLV",absoSD);

  B4cCalorimeterSD* gapSD 
    = new B4cCalorimeterSD("GapSD", "GapHitsCollection", fNofLayers);
  SetSensitiveDetector("GapLV",gapSD);

  // 
  // Magnetic field
  //
  // Create global magnetic field messenger.
  // Uniform magnetic field is then created automatically if
  // the field value is not zero.
  G4ThreeVector fieldValue = G4ThreeVector();
  fMagFieldMessenger = new G4GlobalMagFieldMessenger(fieldValue);
  fMagFieldMessenger->SetVerboseLevel(1);
  
  // Register the field messenger for deleting
  G4AutoDelete::Register(fMagFieldMessenger);
}

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DefineMaterials()

void B4cDetectorConstruction::DefineMaterials ( )

private

Definition at line 84 of file B4cDetectorConstruction.cc.

{ 
  // Lead material defined using NIST Manager
  G4NistManager* nistManager = G4NistManager::Instance();
  nistManager->FindOrBuildMaterial("G4_Pb");
  
  // Liquid argon material
  G4double a;  // mass of a mole;
  G4double z;  // z=mean number of protons;  
  G4double density; 
  new G4Material("liquidArgon", z=18., a= 39.95*g/mole, density= 1.390*g/cm3);
         // The argon by NIST Manager is a gas with a different density

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

  // Print materials
  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}

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DefineVolumes()

G4VPhysicalVolume * B4cDetectorConstruction::DefineVolumes ( )

private

Definition at line 107 of file B4cDetectorConstruction.cc.

{
  // Geometry parameters
  fNofLayers = 10;
  G4double absoThickness = 10.*mm;
  G4double gapThickness =  5.*mm;
  G4double calorSizeXY  = 10.*cm;

  G4double layerThickness = absoThickness + gapThickness;
  G4double calorThickness = fNofLayers * layerThickness;
  G4double worldSizeXY = 1.2 * calorSizeXY;
  G4double worldSizeZ  = 1.2 * calorThickness; 
  
  // Get materials
  G4Material* defaultMaterial = G4Material::GetMaterial("Galactic");
  G4Material* absorberMaterial = G4Material::GetMaterial("G4_Pb");
  G4Material* gapMaterial = G4Material::GetMaterial("liquidArgon");
  
  if ( ! defaultMaterial || ! absorberMaterial || ! gapMaterial ) {
    G4ExceptionDescription msg;
    msg << "Cannot retrieve materials already defined."; 
    G4Exception("B4DetectorConstruction::DefineVolumes()",
      "MyCode0001", FatalException, msg);
  }  
   
  //     
  // World
  //
  G4VSolid* worldS 
    = new G4Box("World",           // its name
                 worldSizeXY/2, worldSizeXY/2, worldSizeZ/2); // its size
                         
  G4LogicalVolume* worldLV
    = new G4LogicalVolume(
                 worldS,           // its solid
                 defaultMaterial,  // its material
                 "World");         // its name
                                   
  G4VPhysicalVolume* worldPV
    = new G4PVPlacement(
                 0,                // no rotation
                 G4ThreeVector(),  // at (0,0,0)
                 worldLV,          // its logical volume                         
                 "World",          // its name
                 0,                // its mother  volume
                 false,            // no boolean operation
                 0,                // copy number
                 fCheckOverlaps);  // checking overlaps 
  
  //                               
  // Calorimeter
  //  
  G4VSolid* calorimeterS
    = new G4Box("Calorimeter",     // its name
                 calorSizeXY/2, calorSizeXY/2, calorThickness/2); // its size
                         
  G4LogicalVolume* calorLV
    = new G4LogicalVolume(
                 calorimeterS,     // its solid
                 defaultMaterial,  // its material
                 "Calorimeter");   // its name
                                   
  new G4PVPlacement(
                 0,                // no rotation
                 G4ThreeVector(),  // at (0,0,0)
                 calorLV,          // its logical volume                         
                 "Calorimeter",    // its name
                 worldLV,          // its mother  volume
                 false,            // no boolean operation
                 0,                // copy number
                 fCheckOverlaps);  // checking overlaps 
   
  //                                 
  // Layer
  //
  G4VSolid* layerS 
    = new G4Box("Layer",           // its name
                 calorSizeXY/2, calorSizeXY/2, layerThickness/2); //its size
                         
  G4LogicalVolume* layerLV
    = new G4LogicalVolume(
                 layerS,           // its solid
                 defaultMaterial,  // its material
                 "Layer");         // its name

  new G4PVReplica(
                 "Layer",          // its name
                 layerLV,          // its logical volume
                 calorLV,          // its mother
                 kZAxis,           // axis of replication
                 fNofLayers,        // number of replica
                 layerThickness);  // witdth of replica
  
  //                               
  // Absorber
  //
  G4VSolid* absorberS 
    = new G4Box("Abso",            // its name
                 calorSizeXY/2, calorSizeXY/2, absoThickness/2); // its size
                         
  G4LogicalVolume* absorberLV
    = new G4LogicalVolume(
                 absorberS,        // its solid
                 absorberMaterial, // its material
                 "AbsoLV");        // its name
                                   
   new G4PVPlacement(
                 0,                // no rotation
                 G4ThreeVector(0., 0., -gapThickness/2), // its position
                 absorberLV,       // its logical volume                         
                 "Abso",           // its name
                 layerLV,          // its mother  volume
                 false,            // no boolean operation
                 0,                // copy number
                 fCheckOverlaps);  // checking overlaps 

  //                               
  // Gap
  //
  G4VSolid* gapS 
    = new G4Box("Gap",             // its name
                 calorSizeXY/2, calorSizeXY/2, gapThickness/2); // its size
                         
  G4LogicalVolume* gapLV
    = new G4LogicalVolume(
                 gapS,             // its solid
                 gapMaterial,      // its material
                 "GapLV");         // its name
                                   
  new G4PVPlacement(
                 0,                // no rotation
                 G4ThreeVector(0., 0., absoThickness/2), // its position
                 gapLV,            // its logical volume                         
                 "Gap",            // its name
                 layerLV,          // its mother  volume
                 false,            // no boolean operation
                 0,                // copy number
                 fCheckOverlaps);  // checking overlaps 
 
  //
  // print parameters
  //
  G4cout
    << G4endl 
    << "------------------------------------------------------------" << G4endl
    << "---> The calorimeter is " << fNofLayers << " layers of: [ "
    << absoThickness/mm << "mm of " << absorberMaterial->GetName() 
    << " + "
    << gapThickness/mm << "mm of " << gapMaterial->GetName() << " ] " << G4endl
    << "------------------------------------------------------------" << G4endl;
  
  //                                        
  // Visualization attributes
  //
  worldLV->SetVisAttributes (G4VisAttributes::Invisible);

  G4VisAttributes* simpleBoxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
  simpleBoxVisAtt->SetVisibility(true);
  calorLV->SetVisAttributes(simpleBoxVisAtt);

  //
  // Always return the physical World
  //
  return worldPV;
}

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Member Data Documentation

fCheckOverlaps

G4bool B4cDetectorConstruction::fCheckOverlaps

private

Definition at line 77 of file B4cDetectorConstruction.hh.

fMagFieldMessenger

G4ThreadLocal G4GlobalMagFieldMessenger * B4cDetectorConstruction::fMagFieldMessenger = 0

staticprivate

Definition at line 74 of file B4cDetectorConstruction.hh.

fNofLayers

G4int B4cDetectorConstruction::fNofLayers

private

Definition at line 78 of file B4cDetectorConstruction.hh.

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The documentation for this class was generated from the following files:

• B4cDetectorConstruction.hh
• B4cDetectorConstruction.cc