GB06DetectorConstruction.cc

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#include "GB06DetectorConstruction.hh"
#include "G4SystemOfUnits.hh"

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

#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4LogicalVolumeStore.hh"

#include "G4NistManager.hh"

#include "GB06SD.hh"
#include "G4SDManager.hh"


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GB06DetectorConstruction::GB06DetectorConstruction()
 : G4VUserDetectorConstruction()
{}

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GB06DetectorConstruction::~GB06DetectorConstruction()
{}

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G4VPhysicalVolume* GB06DetectorConstruction::Construct()
{
  G4Material*    worldMaterial =
    G4NistManager::Instance()->FindOrBuildMaterial("G4_Galactic");
  G4Material* concreteMaterial =
    G4NistManager::Instance()->FindOrBuildMaterial("G4_CONCRETE");


  G4VSolid*        solidWorld = new G4Box("World.solid", 10*m, 10*m, 10*m );
  
  G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld,      // its solid
                                                    worldMaterial,   // its material
                                                    "World.logical");// its name
  
  G4PVPlacement*   physiWorld = new   G4PVPlacement(nullptr,         // no rotation
                                                    G4ThreeVector(), // at (0,0,0)
                                                    logicWorld,      // its logical volume
                                                    "World.physical",// its name
                                                    nullptr,         // its mother volume
                                                    false,           // no bool. operation
                                                    0);              // copy number
  
  // ----------------------------------------------------
  // -- volume of shield, made of concrete, in one block:
  // ----------------------------------------------------
  G4double halfXY = 1.5*m;
  G4double halfZ  = 2.5*m;
  G4VSolid*      solidShield = new G4Box("shield.solid", halfXY, halfXY, halfZ );
  
  G4LogicalVolume* logicTest = new G4LogicalVolume(solidShield,        // its solid
                                                   concreteMaterial,   // its material
                                                   "shield.logical");  // its name
  
  new G4PVPlacement(nullptr,                       // no rotation
                    G4ThreeVector(0, 0, halfZ),    // volume entrance is set at (0,0,0)
                    logicTest,                     // its logical volume
                    "shield.physical",             // its name
                    logicWorld,                    // its mother  volume
                    false,                         // no boolean operation
                    0);                            // copy number
  
  // ------------------------------------------------------------
  // -- dummy volume to display exiting neutron flux information:
  // ------------------------------------------------------------
  G4double halfz = 1*cm;
  G4VSolid*        solidMeasurement = new G4Box("meas.solid", halfXY, halfXY, halfz );
  
  G4LogicalVolume* logicMeasurement = new G4LogicalVolume(solidMeasurement,// its solid
                                                          worldMaterial,   // its material
                                                          "meas.logical"); // its name
  
  new G4PVPlacement(nullptr,                               // no rotation
                    G4ThreeVector(0, 0, 2*halfZ + halfz),  // entrance set after shield
                    logicMeasurement,                      // its logical volume
                    "meas.physical",                       // its name
                    logicWorld,                            // its mother  volume
                    false,                                 // no boolean operation
                    0);                                    // copy number

  
  // -- world volume pointer returned:
  return physiWorld;
}


void GB06DetectorConstruction::ConstructSDandField()
{
  
  // ---------------------------------------------------------------------------------
  // -- Attach sensitive detector to print information on particle exiting the shield:
  // ---------------------------------------------------------------------------------
  // -- create and register sensitive detector code module:
  G4SDManager* SDman = G4SDManager::GetSDMpointer();
  G4VSensitiveDetector* sd = new GB06SD("Measurer");
  SDman->AddNewDetector(sd);
  // -- Fetch volume for sensitivity and attach sensitive module to it:
  G4LogicalVolume* logicSD =
    G4LogicalVolumeStore::GetInstance()->GetVolume("meas.logical");
  logicSD->SetSensitiveDetector(sd);

}