DetectorConstruction.cc

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//
//
//
//
// DetectorConstruction
//
// Created: 20.06.2008 V.Ivanchenko
//
// Modified:
//
// 

#include "DetectorConstruction.hh"
#include "DetectorMessenger.hh"

#include "G4Tubs.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"

#include "G4RunManager.hh"

#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"

#include "G4VisAttributes.hh"
#include "G4Colour.hh"

#include "G4UnitsTable.hh"
#include "G4ios.hh"

#include "G4NistManager.hh"

#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

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DetectorConstruction::DetectorConstruction()
: G4VUserDetectorConstruction(),
  fTargetMaterial(nullptr), fWorldMaterial(nullptr),
  fSolidW(nullptr), fSolidA(nullptr),
  fLogicTarget(nullptr), fLogicWorld(nullptr),
  fPhysWorld(nullptr), fPhysList(nullptr)
{
  fDetectorMessenger = new DetectorMessenger(this);

  fRadius = 5.*cm;
  fLength = 10.*cm;

  fTargetMaterial = G4NistManager::Instance()->FindOrBuildMaterial("G4_Al");
  fWorldMaterial = 
    G4NistManager::Instance()->FindOrBuildMaterial("G4_Galactic");

  ComputeGeomParameters();
}

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DetectorConstruction::~DetectorConstruction()
{ 
  delete fDetectorMessenger;
}

void DetectorConstruction::ComputeGeomParameters()
{
  // Sizes
  fWorldR  = fRadius + CLHEP::cm;
  fWorldZ  = fLength + CLHEP::cm;
  if(fPhysWorld) {
    fSolidW->SetOuterRadius(fWorldR);
    fSolidW->SetZHalfLength(fWorldZ*0.5);
    fSolidA->SetOuterRadius(fRadius);
    fSolidA->SetZHalfLength(fLength*0.5);
  }
}

G4VPhysicalVolume* DetectorConstruction::Construct()
{
  if(fPhysWorld) { return fPhysWorld; }
  ComputeGeomParameters();

  //
  // World
  //
  fSolidW = new G4Tubs("World", 0., fWorldR, 0.5*fWorldZ, 0., twopi);
  fLogicWorld = new G4LogicalVolume(fSolidW, fWorldMaterial,"World");
  fPhysWorld  = new G4PVPlacement(nullptr, G4ThreeVector(0.,0.,0.),
                                  fLogicWorld, "World", 
                                  nullptr, false, 0);

  //
  // Target volume
  //
  fSolidA = new G4Tubs("Target", 0., fRadius, 0.5*fLength, 0.,twopi);
  fLogicTarget = new G4LogicalVolume(fSolidA, fTargetMaterial, "Target");
  new G4PVPlacement(nullptr, G4ThreeVector(), fLogicTarget, "Target",
                    fLogicWorld, false, 0);

  G4cout << "### Target consist of " 
         << fTargetMaterial->GetName() 
         << " disks with R(mm)= " << fRadius/mm
         << "  fLength(mm)= " << fLength/mm
         <<  "  ###" << G4endl;

  // colors
  fLogicWorld->SetVisAttributes(G4VisAttributes::GetInvisible());

  G4VisAttributes* regCcolor = new G4VisAttributes(G4Colour(0., 0.3, 0.7));
  fLogicTarget->SetVisAttributes(regCcolor);

  G4cout << *(G4Material::GetMaterialTable()) << G4endl;

  return fPhysWorld;
}

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void DetectorConstruction::SetTargetMaterial(const G4String& mat)
{
  // search the material by its name
  G4Material* material = G4NistManager::Instance()->FindOrBuildMaterial(mat);

  if (material && material != fTargetMaterial) {
    fTargetMaterial = material;
    if(fLogicTarget) { fLogicTarget->SetMaterial(fTargetMaterial); }
    G4RunManager::GetRunManager()->PhysicsHasBeenModified();
  }
}

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void DetectorConstruction::SetWorldMaterial(const G4String& mat)
{
  // search the material by its name
  G4Material* material = G4NistManager::Instance()->FindOrBuildMaterial(mat);

  if (material && material != fWorldMaterial) {
    fWorldMaterial = material;
    if(fLogicWorld) { fLogicWorld->SetMaterial(fWorldMaterial); }
    G4RunManager::GetRunManager()->PhysicsHasBeenModified();
  }
}

void DetectorConstruction::SetTargetRadius(G4double val)  
{
  if(val > 0.0 && val != fRadius) {
    fRadius = val;
    ComputeGeomParameters();
  } 
}

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void DetectorConstruction::SetTargetLength(G4double val)  
{
  if(val > 0.0 && val != fLength) {
    fLength = val;
    ComputeGeomParameters();
  } 
}

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