Gabriele Cosmo
357 lines
13 KiB
C++
357 lines
13 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
// $Id$
|
|
//
|
|
/// \file B2bDetectorConstruction.cc
|
|
/// \brief Implementation of the B2bDetectorConstruction class
|
|
|
|
#include "B2bDetectorConstruction.hh"
|
|
#include "B2bDetectorMessenger.hh"
|
|
#include "B2bChamberParameterisation.hh"
|
|
#include "B2TrackerSD.hh"
|
|
|
|
#include "G4Material.hh"
|
|
#include "G4NistManager.hh"
|
|
|
|
#include "G4Box.hh"
|
|
#include "G4Tubs.hh"
|
|
#include "G4LogicalVolume.hh"
|
|
#include "G4PVPlacement.hh"
|
|
#include "G4PVParameterised.hh"
|
|
#include "G4GlobalMagFieldMessenger.hh"
|
|
#include "G4AutoDelete.hh"
|
|
|
|
#include "G4GeometryTolerance.hh"
|
|
#include "G4GeometryManager.hh"
|
|
|
|
#include "G4UserLimits.hh"
|
|
|
|
#include "G4VisAttributes.hh"
|
|
#include "G4Colour.hh"
|
|
|
|
#include "G4SystemOfUnits.hh"
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
G4ThreadLocal
|
|
G4GlobalMagFieldMessenger* B2bDetectorConstruction::fMagFieldMessenger = 0;
|
|
|
|
B2bDetectorConstruction::B2bDetectorConstruction()
|
|
:G4VUserDetectorConstruction(),
|
|
fLogicTarget(NULL), fLogicChamber(NULL),
|
|
fTargetMaterial(NULL), fChamberMaterial(NULL),
|
|
fStepLimit(NULL),
|
|
fCheckOverlaps(true)
|
|
{
|
|
fMessenger = new B2bDetectorMessenger(this);
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
B2bDetectorConstruction::~B2bDetectorConstruction()
|
|
{
|
|
delete fStepLimit;
|
|
delete fMessenger;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
G4VPhysicalVolume* B2bDetectorConstruction::Construct()
|
|
{
|
|
// Define materials
|
|
DefineMaterials();
|
|
|
|
// Define volumes
|
|
return DefineVolumes();
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
void B2bDetectorConstruction::DefineMaterials()
|
|
{
|
|
// Material definition
|
|
|
|
G4NistManager* nistManager = G4NistManager::Instance();
|
|
|
|
// Air defined using NIST Manager
|
|
nistManager->FindOrBuildMaterial("G4_AIR");
|
|
|
|
// Lead defined using NIST Manager
|
|
fTargetMaterial = nistManager->FindOrBuildMaterial("G4_Pb");
|
|
|
|
// Xenon gas defined using NIST Manager
|
|
fChamberMaterial = nistManager->FindOrBuildMaterial("G4_Xe");
|
|
|
|
// Print materials
|
|
G4cout << *(G4Material::GetMaterialTable()) << G4endl;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
G4VPhysicalVolume* B2bDetectorConstruction::DefineVolumes()
|
|
{
|
|
G4Material* air = G4Material::GetMaterial("G4_AIR");
|
|
|
|
// Sizes of the principal geometrical components (solids)
|
|
|
|
G4int NbOfChambers = 5;
|
|
G4double chamberSpacing = 80*cm; // from chamber center to center!
|
|
|
|
G4double chamberWidth = 20.0*cm; // width of the chambers
|
|
G4double targetLength = 5.0*cm; // full length of Target
|
|
|
|
G4double trackerLength = (NbOfChambers+1)*chamberSpacing;
|
|
|
|
G4double worldLength = 1.2 * (2*targetLength + trackerLength);
|
|
|
|
G4double targetRadius = 0.5*targetLength; // Radius of Target
|
|
targetLength = 0.5*targetLength; // Half length of the Target
|
|
G4double trackerSize = 0.5*trackerLength; // Half length of the Tracker
|
|
|
|
// Definitions of Solids, Logical Volumes, Physical Volumes
|
|
|
|
// World
|
|
|
|
G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
|
|
|
|
G4cout << "Computed tolerance = "
|
|
<< G4GeometryTolerance::GetInstance()->GetSurfaceTolerance()/mm
|
|
<< " mm" << G4endl;
|
|
|
|
G4Box* worldS
|
|
= new G4Box("world", //its name
|
|
worldLength/2,worldLength/2,worldLength/2); //its size
|
|
G4LogicalVolume* worldLV
|
|
= new G4LogicalVolume(
|
|
worldS, //its solid
|
|
air, //its material
|
|
"World"); //its name
|
|
|
|
// Must place the World Physical volume unrotated at (0,0,0).
|
|
//
|
|
G4VPhysicalVolume* worldPV
|
|
= new G4PVPlacement(
|
|
0, // no rotation
|
|
G4ThreeVector(), // at (0,0,0)
|
|
worldLV, // its logical volume
|
|
"World", // its name
|
|
0, // its mother volume
|
|
false, // no boolean operations
|
|
0, // copy number
|
|
fCheckOverlaps); // checking overlaps
|
|
|
|
// Target
|
|
|
|
G4ThreeVector positionTarget = G4ThreeVector(0,0,-(targetLength+trackerSize));
|
|
|
|
G4Tubs* targetS
|
|
= new G4Tubs("target",0.,targetRadius,targetLength,0.*deg,360.*deg);
|
|
fLogicTarget
|
|
= new G4LogicalVolume(targetS, fTargetMaterial,"Target",0,0,0);
|
|
new G4PVPlacement(0, // no rotation
|
|
positionTarget, // at (x,y,z)
|
|
fLogicTarget, // its logical volume
|
|
"Target", // its name
|
|
worldLV, // its mother volume
|
|
false, // no boolean operations
|
|
0, // copy number
|
|
fCheckOverlaps); // checking overlaps
|
|
|
|
G4cout << "Target is " << 2*targetLength/cm << " cm of "
|
|
<< fTargetMaterial->GetName() << G4endl;
|
|
|
|
// Tracker
|
|
|
|
G4ThreeVector positionTracker = G4ThreeVector(0,0,0);
|
|
|
|
G4Tubs* trackerS
|
|
= new G4Tubs("tracker",0,trackerSize,trackerSize, 0.*deg, 360.*deg);
|
|
G4LogicalVolume* trackerLV
|
|
= new G4LogicalVolume(trackerS, air, "Tracker",0,0,0);
|
|
new G4PVPlacement(0, // no rotation
|
|
positionTracker, // at (x,y,z)
|
|
trackerLV, // its logical volume
|
|
"Tracker", // its name
|
|
worldLV, // its mother volume
|
|
false, // no boolean operations
|
|
0, // copy number
|
|
fCheckOverlaps); // checking overlaps
|
|
|
|
// Tracker segments
|
|
|
|
// An example of Parameterised volumes
|
|
// Dummy values for G4Tubs -- modified by parameterised volume
|
|
|
|
G4Tubs* chamberS
|
|
= new G4Tubs("tracker",0, 100*cm, 100*cm, 0.*deg, 360.*deg);
|
|
fLogicChamber
|
|
= new G4LogicalVolume(chamberS,fChamberMaterial,"Chamber",0,0,0);
|
|
|
|
G4double firstPosition = -trackerSize + chamberSpacing;
|
|
G4double firstLength = trackerLength/10;
|
|
G4double lastLength = trackerLength;
|
|
|
|
G4VPVParameterisation* chamberParam =
|
|
new B2bChamberParameterisation(
|
|
NbOfChambers, // NoChambers
|
|
firstPosition, // Z of center of first
|
|
chamberSpacing, // Z spacing of centers
|
|
chamberWidth, // chamber width
|
|
firstLength, // initial length
|
|
lastLength); // final length
|
|
|
|
// dummy value : kZAxis -- modified by parameterised volume
|
|
|
|
new G4PVParameterised("Chamber", // their name
|
|
fLogicChamber, // their logical volume
|
|
trackerLV, // Mother logical volume
|
|
kZAxis, // Are placed along this axis
|
|
NbOfChambers, // Number of chambers
|
|
chamberParam, // The parametrisation
|
|
fCheckOverlaps); // checking overlaps
|
|
|
|
G4cout << "There are " << NbOfChambers << " chambers in the tracker region. "
|
|
<< G4endl
|
|
<< "The chambers are " << chamberWidth/cm << " cm of "
|
|
<< fChamberMaterial->GetName() << G4endl
|
|
<< "The distance between chamber is " << chamberSpacing/cm << " cm"
|
|
<< G4endl;
|
|
|
|
// Visualization attributes
|
|
|
|
G4VisAttributes* boxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
|
|
worldLV ->SetVisAttributes(boxVisAtt);
|
|
fLogicTarget ->SetVisAttributes(boxVisAtt);
|
|
trackerLV ->SetVisAttributes(boxVisAtt);
|
|
|
|
G4VisAttributes* chamberVisAtt = new G4VisAttributes(G4Colour(1.0,1.0,0.0));
|
|
fLogicChamber->SetVisAttributes(chamberVisAtt);
|
|
|
|
// Example of User Limits
|
|
//
|
|
// Below is an example of how to set tracking constraints in a given
|
|
// logical volume
|
|
//
|
|
// Sets a max step length in the tracker region, with G4StepLimiter
|
|
|
|
G4double maxStep = 0.5*chamberWidth;
|
|
fStepLimit = new G4UserLimits(maxStep);
|
|
trackerLV->SetUserLimits(fStepLimit);
|
|
|
|
/// Set additional contraints on the track, with G4UserSpecialCuts
|
|
///
|
|
/// G4double maxLength = 2*trackerLength, maxTime = 0.1*ns, minEkin = 10*MeV;
|
|
/// trackerLV->SetUserLimits(new G4UserLimits(maxStep,
|
|
/// maxLength,
|
|
/// maxTime,
|
|
/// minEkin));
|
|
|
|
// Always return the physical world
|
|
|
|
return worldPV;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
void B2bDetectorConstruction::ConstructSDandField()
|
|
{
|
|
// Sensitive detectors
|
|
|
|
G4String trackerChamberSDname = "B2/TrackerChamberSD";
|
|
B2TrackerSD* aTrackerSD = new B2TrackerSD(trackerChamberSDname,
|
|
"TrackerHitsCollection");
|
|
SetSensitiveDetector( fLogicChamber, aTrackerSD );
|
|
|
|
// Create global magnetic field messenger.
|
|
// Uniform magnetic field is then created automatically if
|
|
// the field value is not zero.
|
|
G4ThreeVector fieldValue = G4ThreeVector();
|
|
fMagFieldMessenger = new G4GlobalMagFieldMessenger(fieldValue);
|
|
fMagFieldMessenger->SetVerboseLevel(1);
|
|
|
|
// Register the field messenger for deleting
|
|
G4AutoDelete::Register(fMagFieldMessenger);
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
void B2bDetectorConstruction::SetTargetMaterial(G4String materialName)
|
|
{
|
|
G4NistManager* nistManager = G4NistManager::Instance();
|
|
|
|
G4Material* pttoMaterial =
|
|
nistManager->FindOrBuildMaterial(materialName);
|
|
|
|
if (fTargetMaterial != pttoMaterial) {
|
|
if ( pttoMaterial ) {
|
|
fTargetMaterial = pttoMaterial;
|
|
if (fLogicTarget) fLogicTarget->SetMaterial(fTargetMaterial);
|
|
G4cout
|
|
<< G4endl
|
|
<< "----> The target is made of " << materialName << G4endl;
|
|
} else {
|
|
G4cout
|
|
<< G4endl
|
|
<< "--> WARNING from SetTargetMaterial : "
|
|
<< materialName << " not found" << G4endl;
|
|
}
|
|
}
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
void B2bDetectorConstruction::SetChamberMaterial(G4String materialName)
|
|
{
|
|
G4NistManager* nistManager = G4NistManager::Instance();
|
|
|
|
G4Material* pttoMaterial =
|
|
nistManager->FindOrBuildMaterial(materialName);
|
|
|
|
if (fChamberMaterial != pttoMaterial) {
|
|
if ( pttoMaterial ) {
|
|
fChamberMaterial = pttoMaterial;
|
|
if (fLogicChamber) fLogicChamber->SetMaterial(fChamberMaterial);
|
|
G4cout
|
|
<< G4endl
|
|
<< "----> The chambers are made of " << materialName << G4endl;
|
|
} else {
|
|
G4cout
|
|
<< G4endl
|
|
<< "--> WARNING from SetChamberMaterial : "
|
|
<< materialName << " not found" << G4endl;
|
|
}
|
|
}
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
void B2bDetectorConstruction::SetMaxStep(G4double maxStep)
|
|
{
|
|
if ((fStepLimit)&&(maxStep>0.)) fStepLimit->SetMaxAllowedStep(maxStep);
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|