DetectorConstruction.cc

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/// \file scavenger/src/DetectorConstruction.cc
/// \brief Implementation of the scavenger::DetectorConstruction class
 
#include "DetectorConstruction.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4VisAttributes.hh"
#include "G4SystemOfUnits.hh"
#include "G4SDManager.hh"
#include "G4MultiFunctionalDetector.hh"
#include "G4VPrimitiveScorer.hh"
#include "ScoreSpecies.hh"
#include "PrimaryKiller.hh"
 
namespace scavenger
{
 
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DetectorConstruction::DetectorConstruction()
  : G4VUserDetectorConstruction() {}
 
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G4VPhysicalVolume *DetectorConstruction::Construct() {
  // Water is defined from NIST material database
  auto *man = G4NistManager::Instance();
  auto *water = man->FindOrBuildMaterial("G4_WATER");
 
  // World
  G4double world_sizeXYZ = 1. * km;
  auto solidWorld =
    new G4Box("World",
              0.5 * world_sizeXYZ,
              0.5 * world_sizeXYZ,
              0.5 * world_sizeXYZ);
 
  auto logicWorld =
    new G4LogicalVolume(solidWorld,
                        water,
                        "World");
 
  G4VPhysicalVolume *physWorld =
    new G4PVPlacement(nullptr,               //no rotation
                      G4ThreeVector(),       //its position at (0,0,0)
                      logicWorld,            //its logical volume
                      "World",               //its name
                      nullptr,               //its mother  volume
                      false,                 //no boolean operation
                      0,                     //copy number
                      true);                 //checking overlaps
 
  // Visualization attributes
  auto worldVisAtt = new G4VisAttributes(G4Colour(.5, 1.0, .5));
  worldVisAtt->SetVisibility(true);
  logicWorld->SetVisAttributes(worldVisAtt);
  return physWorld;
}
 
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void DetectorConstruction::ConstructSDandField() {
  G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
  /**
   * declare World as a MultiFunctionalDetector scorer
   */
  auto mfDetector = new G4MultiFunctionalDetector("mfDetector");
 
  // Kill primary track after a chosen energy loss OR under a chosen
  // kinetic energy
  auto primaryKiller = new PrimaryKiller("PrimaryKiller");
  primaryKiller->SetMinLossEnergyLimit(500. * eV); // default value
  primaryKiller->SetMaxLossEnergyLimit(1. * keV); // default value
  mfDetector->RegisterPrimitive(primaryKiller);
 
  // Record Species scorer:
  //  - score number of species over time
  //  - score the total energy deposition
  //  - compute the radiochemical yields (G values)
  G4VPrimitiveScorer *gValues = new ScoreSpecies("Species");
  mfDetector->RegisterPrimitive(gValues);
  G4SDManager::GetSDMpointer()->AddNewDetector(mfDetector);
  SetSensitiveDetector("World", mfDetector);
}
 
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}