ExGflash3DetectorConstruction.cc

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/// \file ExGflash3DetectorConstruction.cc
/// \brief Implementation of the ExGflash3DetectorConstruction class
//
// Created by Joanna Weng 26.11.2004
 
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// User Classes
#include "ExGflash3DetectorConstruction.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"
 
// fast simulation
#include "GFlashHitMaker.hh"
#include "GFlashHomoShowerParameterisation.hh"
#include "GFlashParticleBounds.hh"
#include "GFlashShowerModel.hh"
 
#include "G4FastSimulationManager.hh"
 
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ExGflash3DetectorConstruction::ExGflash3DetectorConstruction()
{
  G4cout << "ExGflash3DetectorConstruction::Detector constructor" << G4endl;
}
 
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ExGflash3DetectorConstruction::~ExGflash3DetectorConstruction()
{
  delete fFastShowerModel;
  delete fParameterisation;
  delete fParticleBounds;
  delete fHitMaker;
}
 
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G4VPhysicalVolume* ExGflash3DetectorConstruction::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* experimentalHall_phys =
    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
                                     pbWO4,  // 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);
 
  // Individual crystals are created as part of the readout geometry in the parallel world
 
  experimentalHallLog->SetVisAttributes(G4VisAttributes::GetInvisible());
  auto caloVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
  caloLog->SetVisAttributes(caloVisAtt);
 
  // define the fParameterisation region
  fRegion = new G4Region("crystals");
  caloLog->SetRegion(fRegion);
  fRegion->AddRootLogicalVolume(caloLog);
 
  return experimentalHall_phys;
}
 
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void ExGflash3DetectorConstruction::ConstructSDandField()
{
  // SD moved to parallel world
 
  // -- fast simulation models:
  // **********************************************
  // * Initializing shower modell
  // ***********************************************
  G4cout << "Creating shower parameterization models" << G4endl;
  fFastShowerModel = new GFlashShowerModel("fFastShowerModel", fRegion);
  fParameterisation = new GFlashHomoShowerParameterisation(fRegion->GetMaterialIterator()[0]);
  fFastShowerModel->SetParameterisation(*fParameterisation);
  // Energy Cuts to kill particles:
  fParticleBounds = new GFlashParticleBounds();
  fFastShowerModel->SetParticleBounds(*fParticleBounds);
  // Makes the EnergieSpots
  fHitMaker = new GFlashHitMaker();
  // Important: use SD defined in different geometry
  fHitMaker->SetNameOfWorldWithSD("parallelWorld");
  fFastShowerModel->SetHitMaker(*fHitMaker);
  G4cout << "end shower parameterization." << G4endl;
  // **********************************************
}
 
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