ExGflash2DetectorConstruction.cc

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/// \file ExGflash2DetectorConstruction.cc
/// \brief Implementation of the ExGflash2DetectorConstruction class
//
// Created by Joanna Weng 26.11.2004
 
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// User Classes
#include "ExGflash2DetectorConstruction.hh"
 
#include "ExGflash2SensitiveDetector.hh"
 
// G4 Classes
#include "G4AutoDelete.hh"
#include "G4Box.hh"
#include "G4Colour.hh"
#include "G4LogicalVolume.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4SDManager.hh"
#include "G4SystemOfUnits.hh"
#include "G4ThreeVector.hh"
#include "G4VPhysicalVolume.hh"
#include "G4VisAttributes.hh"
#include "globals.hh"
 
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ExGflash2DetectorConstruction::ExGflash2DetectorConstruction()
{
  G4cout << "ExGflash2DetectorConstruction::Detector constructor" << G4endl;
}
 
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ExGflash2DetectorConstruction::~ExGflash2DetectorConstruction() = default;
 
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G4VPhysicalVolume* ExGflash2DetectorConstruction::Construct()
{
  //--------- Definitions of Solids, Logical Volumes, Physical Volumes ---------
  G4cout << "Defining the materials" << G4endl;
  // Get nist material manager
  G4NistManager* nistManager = G4NistManager::Instance();
  // Build materials
  G4Material* air = nistManager->FindOrBuildMaterial("G4_AIR");
  G4Material* pbWO4 = nistManager->FindOrBuildMaterial("G4_PbWO4");
 
  /*******************************
   * The Experimental Hall       *
   *******************************/
  G4double experimentalHall_x = 1000. * cm;
  G4double experimentalHall_y = 1000. * cm;
  G4double experimentalHall_z = 1000. * cm;
 
  G4VSolid* experimentalHall_box = new G4Box("expHall_box",  // World Volume
                                             experimentalHall_x,  // x size
                                             experimentalHall_y,  // y size
                                             experimentalHall_z);  // z size
 
  auto experimentalHallLog = new G4LogicalVolume(experimentalHall_box, air, "expHallLog",
                                                 nullptr,  // opt: fieldManager
                                                 nullptr,  // opt: SensitiveDetector
                                                 nullptr);  // opt: UserLimits
  G4VPhysicalVolume* experimentalHallPhys =
    new G4PVPlacement(nullptr,
                      G4ThreeVector(),  // at (0,0,0)
                      "expHall", experimentalHallLog, nullptr, false, 0);
 
  //------------------------------
  // Calorimeter segments
  //------------------------------
  // Simplified `CMS-like` PbWO4 crystal calorimeter
 
  G4int nbOfCrystals = 10;  // this are the crystals PER ROW in this example
                            // cube of 10 x 10 crystals
                            // don't change it @the moment, since
                            // the readout in event action assumes this
                            // dimensions and is not automatically adapted
                            // in this version of the example :-(
  // Simplified `CMS-like` PbWO4 crystal calorimeter
  G4double calo_xside = 31 * cm;
  G4double calo_yside = 31 * cm;
  G4double calo_zside = 24 * cm;
 
  G4double crystalWidth = 3 * cm;
  G4double crystalLength = 24 * cm;
 
  calo_xside = (crystalWidth * nbOfCrystals) + 1 * cm;
  calo_yside = (crystalWidth * nbOfCrystals) + 1 * cm;
  calo_zside = crystalLength;
 
  auto calo_box = new G4Box("CMS calorimeter",  // its name
                            calo_xside / 2.,  // size
                            calo_yside / 2., calo_zside / 2.);
  auto caloLog = new G4LogicalVolume(calo_box,  // its solid
                                     air,  // its material
                                     "calo log",  // its name
                                     nullptr,  // opt: fieldManager
                                     nullptr,  // opt: SensitiveDetector
                                     nullptr);  // opt: UserLimit
 
  G4double xpos = 0.0;
  G4double ypos = 0.0;
  G4double zpos = 100.0 * cm;
  new G4PVPlacement(nullptr, G4ThreeVector(xpos, ypos, zpos), caloLog, "calorimeter",
                    experimentalHallLog, false, 1);
 
  // Crystals
  G4VSolid* crystal_box = new G4Box("Crystal",  // its name
                                    crystalWidth / 2, crystalWidth / 2, crystalLength / 2);
  // size
  fCrystalLog = new G4LogicalVolume(crystal_box,  // its solid
                                    pbWO4,  // its material
                                    "CrystalLog");  // its name
 
  for (G4int i = 0; i < nbOfCrystals; i++) {
    for (G4int j = 0; j < nbOfCrystals; j++) {
      G4int n = i * 10 + j;
      G4ThreeVector crystalPos((i * crystalWidth) - 135, (j * crystalWidth) - 135, 0);
      fCrystalPhys[n] = new G4PVPlacement(nullptr,  // no rotation
                                          crystalPos,  // translation
                                          fCrystalLog,
                                          "crystal",  // its name
                                          caloLog, false, i);
    }
  }
  G4cout << "There are " << nbOfCrystals << " crystals per row in the calorimeter, so in total "
         << nbOfCrystals * nbOfCrystals << " crystals" << G4endl;
  G4cout << "They have width of  " << crystalWidth / cm << "  cm and a length of  "
         << crystalLength / cm << " cm. The Material is " << pbWO4 << G4endl;
 
  experimentalHallLog->SetVisAttributes(G4VisAttributes::GetInvisible());
  auto caloVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
  auto crystalVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 0.0));
  caloLog->SetVisAttributes(caloVisAtt);
  fCrystalLog->SetVisAttributes(crystalVisAtt);
 
  // Parametrisation region defined in ExGflash2ParallelWorld
 
  return experimentalHallPhys;
}
 
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void ExGflash2DetectorConstruction::ConstructSDandField()
{
  // -- sensitive detectors:
  G4SDManager* SDman = G4SDManager::GetSDMpointer();
  auto CaloSD = new ExGflash2SensitiveDetector("Calorimeter", this);
  SDman->AddNewDetector(CaloSD);
  fCrystalLog->SetSensitiveDetector(CaloSD);
 
  // Fast simulation implemented in ExGflash2ParallelWorld
}
 
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