Vanwdani: Created page with "

 // // ******************************************************************** // * License and Disclaimer                                           * // *..."

2018-01-23T03:06:25Z

Created page with "<pre> // // ******************************************************************** // * License and Disclaimer * // *..."

New page

<pre>
//
// ********************************************************************
// * 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: ExN02DetectorConstruction.cc 69899 2013-05-17 10:05:33Z gcosmo $
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#include "ExN02DetectorConstruction.hh"
#include "ExN02DetectorMessenger.hh"
#include "ExN02ChamberParameterisation.hh"
#include "ExN02MagneticField.hh"
#include "ExN02TrackerSD.hh"

#include "G4Material.hh"
#include "G4Box.hh"
#include "G4Sphere.hh"
#include "G4EllipticalCone.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVParameterised.hh"
#include "G4SDManager.hh"
#include "G4GeometryTolerance.hh"
#include "G4GeometryManager.hh"

#include "G4UserLimits.hh"

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

#include "G4SystemOfUnits.hh"
#include "G4ios.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ExN02DetectorConstruction::ExN02DetectorConstruction()
:solidWorld(0), logicWorld(0), physiWorld(0),
solidTarget(0), logicTarget(0), physiTarget(0),
solidTracker(0),logicTracker(0),physiTracker(0),
solidChamber(0),logicChamber(0),physiChamber(0),
TargetMater(0), ChamberMater(0),chamberParam(0),
stepLimit(0), fpMagField(0),
fWorldLength(0.), fTargetLength(0.), fTrackerLength(0.),
NbOfChambers(0) , ChamberWidth(0.), ChamberSpacing(0.)
{
fpMagField = new ExN02MagneticField();
detectorMessenger = new ExN02DetectorMessenger(this);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ExN02DetectorConstruction::~ExN02DetectorConstruction()
{
delete fpMagField;
delete stepLimit;
delete chamberParam;
delete detectorMessenger;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4VPhysicalVolume* ExN02DetectorConstruction::Construct()
{
//--------- Material definition ---------

G4double a, z;
G4double density, temperature, pressure;
G4int nel;

density=universe_mean_density;
temperature=0.1*kelvin;
pressure=1.0e-19*pascal;

//New Material
G4Material *BadVacuum = new G4Material("Galactic",z=1.,a=1.01*g/mole,density,kStateGas,temperature, pressure);

//Air
G4Element* N = new G4Element("Nitrogen", "N", z=7., a= 14.01*g/mole);
G4Element* O = new G4Element("Oxygen" , "O", z=8., a= 16.00*g/mole);

G4Material* Air = new G4Material("Air", density= 1.29*mg/cm3, nel=2);
Air->AddElement(N, 70*perCent);
Air->AddElement(O, 30*perCent);

//Lead
G4Material* Pb =
new G4Material("Lead", z=82., a= 207.19*g/mole, density= 11.35*g/cm3);

//Xenon gas
/* G4Material* Xenon =
new G4Material("XenonGas", z=54., a=131.29*g/mole, density= 5.458*mg/cm3,
kStateGas, temperature= 293.15*kelvin, pressure= 1*atmosphere);
*/
// Print all the materials defined.
//
G4cout << G4endl << "The materials defined are : " << G4endl << G4endl;
G4cout << *(G4Material::GetMaterialTable()) << G4endl;

//--------- Sizes of the principal geometrical components (solids) ---------
G4double coneRadiusTop = 21.5*mm;
G4double coneRadiusBot = 149.247*mm;
G4double semiAxis = (coneRadiusBot-coneRadiusTop)/(1325.9*mm);
G4cout << "semiAxis=" << semiAxis/cm << " cm" << G4endl;
G4double zHeight = (coneRadiusTop+coneRadiusBot)/(2.*semiAxis);
G4cout << "zHeight=" << zHeight/cm << " cm" << G4endl;

NbOfChambers = 1;
ChamberWidth = 1.5*cm;
ChamberSpacing = 40*cm;

fTrackerLength = (NbOfChambers+1)*ChamberSpacing; // Full length of Tracker
G4cout << G4endl << "Full length of Tracker=" << fTrackerLength/cm << " cm" << G4endl;
fTargetLength = 132.59*cm; // Full length of Target

TargetMater = Pb;
ChamberMater = BadVacuum;

// fWorldLength= 1.2 *(fTargetLength+fTrackerLength);
fWorldLength= 400 *cm;
G4double targetSize = 0.5*fTargetLength; // Half length of the Target
G4double trackerSize = 0.5*fTrackerLength; // Half length of the Tracker

//--------- Definitions of Solids, Logical Volumes, Physical Volumes ---------

//------------------------------
// World
//------------------------------

G4double HalfWorldLength = 0.5*fWorldLength;

G4GeometryManager::GetInstance()->SetWorldMaximumExtent(fWorldLength);
G4cout << "Computed tolerance = "
<< G4GeometryTolerance::GetInstance()->GetSurfaceTolerance()/mm
<< " mm" << G4endl;

solidWorld= new G4Box("world",HalfWorldLength,HalfWorldLength,HalfWorldLength);
logicWorld= new G4LogicalVolume( solidWorld, BadVacuum, "World", 0, 0, 0);

// Must place the World Physical volume unrotated at (0,0,0).
//
physiWorld = new G4PVPlacement(0, // no rotation
G4ThreeVector(), // at (0,0,0)
logicWorld, // its logical volume
"World", // its name
0, // its mother volume
false, // no boolean operations
0); // copy number

//------------------------------
// Target
//------------------------------

G4ThreeVector positionTarget = G4ThreeVector(0,0,-104.295*cm);

// solidTarget = new G4Box("target",targetSize,targetSize,targetSize);
solidTarget = new G4EllipticalCone("target",semiAxis,semiAxis,zHeight,targetSize);
logicTarget = new G4LogicalVolume(solidTarget,TargetMater,"Target",0,0,0);
G4RotationMatrix *ConeFlip = new G4RotationMatrix();
ConeFlip->rotateY(180*deg);
physiTarget = new G4PVPlacement(ConeFlip, // no rotation
positionTarget, // at (x,y,z)
logicTarget, // its logical volume
"Target", // its name
logicWorld, // its mother volume
false, // no boolean operations
0); // copy number

G4cout << "Target is " << fTargetLength/cm << " cm of "
<< TargetMater->GetName() << G4endl;

//------------------------------
// Tracker
//------------------------------

G4ThreeVector positionTracker = G4ThreeVector(0,0,-200*cm);
G4cout << "trackerSize= "<< trackerSize/cm << " cm" << G4endl;
solidTracker = new G4Sphere("tracker",200*cm,202*cm,90*degree,180*degree,90*degree,180*degree);
logicTracker = new G4LogicalVolume(solidTracker , BadVacuum, "Tracker",0,0,0);
G4RotationMatrix *SphereFlip = new G4RotationMatrix();
SphereFlip->rotateY(180*deg);
physiTracker = new G4PVPlacement(SphereFlip, // no rotation
positionTracker, // at (x,y,z)
logicTracker, // its logical volume
"Tracker", // its name
logicWorld, // its mother volume
false, // no boolean operations
0); // copy number

//------------------------------
// Tracker segments
//------------------------------
//
// An example of Parameterised volumes
// dummy values for G4Box -- modified by parameterised volume

solidChamber = new G4Box("chamber", 10*cm, 10*cm, 10*cm);
logicChamber = new G4LogicalVolume(solidChamber,BadVacuum,"Chamber",0,0,0);

G4double firstPosition = -trackerSize + 0.5*ChamberWidth;
G4cout << "firstPostion=" << firstPosition/cm << " cm" << G4endl;
G4double firstLength = fTrackerLength/2;
G4double lastLength = fTrackerLength;

chamberParam = new ExN02ChamberParameterisation(
NbOfChambers, // NoChambers
firstPosition, // Z of center of first
ChamberSpacing, // Z spacing of centers
ChamberWidth, // Width Chamber
firstLength, // lengthInitial
lastLength); // lengthFinal

// dummy value : kZAxis -- modified by parameterised volume
//
physiChamber = new G4PVParameterised(
"Chamber", // their name
logicChamber, // their logical volume
logicTracker, // Mother logical volume
kZAxis, // Are placed along this axis
NbOfChambers, // Number of chambers
chamberParam); // The parametrisation

G4cout << "There are " << NbOfChambers << " chambers in the tracker region. "
<< "The chambers are " << ChamberWidth/mm << " mm of "
<< ChamberMater->GetName() << "\n The distance between chamber is "
<< ChamberSpacing/cm << " cm" << G4endl;

//------------------------------------------------
// Sensitive detectors
//------------------------------------------------

G4SDManager* SDman = G4SDManager::GetSDMpointer();

G4String trackerChamberSDname = "ExN02/TrackerChamberSD";
ExN02TrackerSD* aTrackerSD = new ExN02TrackerSD( trackerChamberSDname );
SDman->AddNewDetector( aTrackerSD );
logicChamber->SetSensitiveDetector( aTrackerSD );

//--------- Visualization attributes -------------------------------

G4VisAttributes* BoxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));//White
logicWorld ->SetVisAttributes(BoxVisAtt);
G4VisAttributes* ConeVisAtt= new G4VisAttributes(G4Colour(1.0,0.0,0.0));//Red
logicTarget ->SetVisAttributes(ConeVisAtt);
G4VisAttributes* TrackVisAtt= new G4VisAttributes(G4Colour(0.0,0.0,1.0));//Blue
logicTracker->SetVisAttributes(TrackVisAtt);

G4VisAttributes* ChamberVisAtt = new G4VisAttributes(G4Colour(1.0,1.0,0.0));//Yellow
logicChamber->SetVisAttributes(ChamberVisAtt);

//--------- example of User Limits -------------------------------

// below is an example of how to set tracking constraints in a given
// logical volume(see also in N02PhysicsList how to setup the processes
// G4StepLimiter or G4UserSpecialCuts).

// Sets a max Step length in the tracker region, with G4StepLimiter
//
G4double maxStep = 0.05*ChamberWidth;
stepLimit = new G4UserLimits(maxStep);
logicTracker->SetUserLimits(stepLimit);

// Set additional contraints on the track, with G4UserSpecialCuts
//
// G4double maxLength = 2*fTrackerLength, maxTime = 0.1*ns, minEkin = 10*MeV;
// logicTracker->SetUserLimits(new G4UserLimits(maxStep,maxLength,maxTime,
// minEkin));

return physiWorld;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExN02DetectorConstruction::setTargetMaterial(G4String materialName)
{
// search the material by its name
G4Material* pttoMaterial = G4Material::GetMaterial(materialName);
if (pttoMaterial)
{TargetMater = pttoMaterial;
logicTarget->SetMaterial(pttoMaterial);
G4cout << "\n----> The target is " << fTargetLength/cm << " cm of "
<< materialName << G4endl;
}
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExN02DetectorConstruction::setChamberMaterial(G4String materialName)
{
// search the material by its name
G4Material* pttoMaterial = G4Material::GetMaterial(materialName);
if (pttoMaterial)
{ChamberMater = pttoMaterial;
logicChamber->SetMaterial(pttoMaterial);
G4cout << "\n----> The chambers are " << ChamberWidth/cm << " cm of "
<< materialName << G4endl;
}
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExN02DetectorConstruction::SetMagField(G4double fieldValue)
{
fpMagField->SetMagFieldValue(fieldValue);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExN02DetectorConstruction::SetMaxStep(G4double maxStep)
{
if ((stepLimit)&&(maxStep>0.)) stepLimit->SetMaxAllowedStep(maxStep);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

</pre>

ExN02DetectorConstruction.cc - Revision history

Vanwdani: Created page with "
// // ******************************************************************** // * License and Disclaimer * // *..."