ElectronBenchmarkDetector.cc

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// $Id: ElectronBenchmarkDetector.cc 101670 2016-11-21 09:17:10Z gcosmo $
//

#include "ElectronBenchmarkDetector.hh"
    
#include "ElectronBenchmarkDetectorMessenger.hh"

#include "G4RunManager.hh"
#include "G4UImanager.hh"
#include "G4NistManager.hh"
#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"
#include "G4Material.hh"
#include "G4Tubs.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"
#include "G4VisAttributes.hh"
#include "G4Colour.hh"
#include "G4SDManager.hh"
#include "G4SDParticleFilter.hh"
#include "G4MultiFunctionalDetector.hh"
#include "G4VPrimitiveScorer.hh"
#include "G4PSCellFlux.hh"
#include "G4PSPopulation.hh"
#include "G4SystemOfUnits.hh"

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ElectronBenchmarkDetector::ElectronBenchmarkDetector()
:G4VUserDetectorConstruction(),
fMaterialPrimFoil(0),
fLogPrimFoil(0),
fSolidPrimFoil(0),
fScorerRingLog(0),
fLogWorld(0),
fMessenger(0),
fWorldVisAtt(0),
fWindowVisAtt(0),
fPrimFoilVisAtt(0),
fMonVisAtt(0),
fBagVisAtt(0),
fHeliumVisAtt(0),
fRingVisAtt(0),
fScorerVisAtt(0)
{
    // Exit Window
    fPosWindow0     =   0.000000*cm;
    fPosWindow1     =   0.004120*cm;
    
    // Scattering Foil
    fPosPrimFoil    =   2.650000*cm;
    fHalfThicknessPrimFoil = 0.0*cm;
    
    // Monitor Chamber
    fPosMon0        =   5.000000*cm;
    fPosMon1        =   5.011270*cm;
    
    // Helium Bag
    fPosBag0        =   6.497500*cm;
    fPosHelium0     =   6.500000*cm;
    fPosHelium1     = 116.500000*cm;
    fPosBag1        = 116.502500*cm;
    fThicknessRing  =   1.4*cm;
    
    // Scoring Plane
    fPosScorer      = 118.200000*cm;
    fThicknessScorer= 0.001*cm;
    fWidthScorerRing= 0.1*cm;
    
    // Radii
    fRadOverall     =  23.3*cm;
    fRadRingInner   =  20.0*cm;
    
    // Extra space remaining in world volume around apparatus
    fPosDelta       =   1.*cm;
    fRadDelta       =   0.1*cm;

    fMessenger = new ElectronBenchmarkDetectorMessenger(this);
    DefineMaterials();
}

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ElectronBenchmarkDetector::~ElectronBenchmarkDetector()
{
    delete fMessenger;
    
    delete fWorldVisAtt;
    delete fWindowVisAtt;
    delete fPrimFoilVisAtt;
    delete fMonVisAtt;
    delete fBagVisAtt;
    delete fHeliumVisAtt;
    delete fRingVisAtt;
    delete fScorerVisAtt;
}

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G4VPhysicalVolume* ElectronBenchmarkDetector::Construct()
{
    return CreateGeometry();
}

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

void ElectronBenchmarkDetector::DefineMaterials(){
    // Use NIST database for elements and materials whereever possible.
    G4NistManager* man = G4NistManager::Instance();
    man->SetVerbose(1);
    
    // Take all elements and materials from NIST
    man->FindOrBuildMaterial("G4_He");
    man->FindOrBuildMaterial("G4_Be");
    man->FindOrBuildMaterial("G4_Al");
    man->FindOrBuildMaterial("G4_Ti");
    man->FindOrBuildMaterial("G4_Ta");
    man->FindOrBuildMaterial("G4_AIR");
    man->FindOrBuildMaterial("G4_MYLAR");
    
    G4Element* C  = man->FindOrBuildElement("C");
    G4Element* Cu = man->FindOrBuildElement("Cu");
    G4Element* Au = man->FindOrBuildElement("Au");
    G4Element* Ti = man->FindOrBuildElement("Ti");
    G4Element* Al = man->FindOrBuildElement("Al");
    G4Element* V  = man->FindOrBuildElement("V");
    
    // Define materials not in NIST.
    // While the NIST database does contain default materials for C, Cu and Au,
    // those defaults have different densities than the ones used in the
    // benchmark specification.
    G4double density;
    G4int ncomponents;
    G4double fractionmass;
    
    G4Material* G4_C = new G4Material("G4_C", density= 2.18*g/cm3,
                                      ncomponents=1);
    G4_C->AddElement(C, fractionmass=1.00);
    
    G4Material* G4_Cu = new G4Material("G4_Cu", density= 8.92*g/cm3,
                                       ncomponents=1);
    G4_Cu->AddElement(Cu, fractionmass=1.00);
    
    G4Material* G4_Au = new G4Material("G4_Au", density= 19.30*g/cm3,
                                       ncomponents=1);
    G4_Au->AddElement(Au, fractionmass=1.00);

    G4Material* TiAlloy = new G4Material("TiAlloy", density= 4.42*g/cm3,
                                       ncomponents=3);
    TiAlloy->AddElement(Ti, fractionmass=0.90);
    TiAlloy->AddElement(Al, fractionmass=0.06);
    TiAlloy->AddElement(V,  fractionmass=0.04);

    // Print materials table
    G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}

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

G4VPhysicalVolume* ElectronBenchmarkDetector::CreateGeometry(){
    // Clean old geometry, if any
    G4GeometryManager::GetInstance()->OpenGeometry();
    G4PhysicalVolumeStore::GetInstance()->Clean();
    G4LogicalVolumeStore::GetInstance()->Clean();
    G4SolidStore::GetInstance()->Clean();
    
    // Instantiate the world
    G4VPhysicalVolume* physiworld = CreateWorld();
    fLogWorld = physiworld->GetLogicalVolume();
    
    // Instantiate the geometry
    CreateExitWindow(fLogWorld);
    CreatePrimaryFoil(fLogWorld);
    CreateMonitor(fLogWorld);
    CreateHeliumBag(fLogWorld);
    
    // Create the scorers
    CreateScorer(fLogWorld);
    
    return physiworld;
}

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G4VPhysicalVolume* ElectronBenchmarkDetector::CreateWorld(){
    G4double halfLengthWorld = fPosScorer/2. + fPosDelta;
    G4double radWorld = fRadOverall + fRadDelta;
    G4VSolid* worldSolid = new G4Tubs("WorldSolid", 0.*cm, radWorld,
                                      halfLengthWorld, 0.*deg, 360.*deg);
    G4LogicalVolume* worldLog = new G4LogicalVolume(worldSolid,
                        G4Material::GetMaterial("G4_AIR"), "WorldLog");
    
    fWorldVisAtt = new G4VisAttributes(G4Colour(1.0,1.0,1.0));
    worldLog->SetVisAttributes(fWorldVisAtt);
    
    G4VPhysicalVolume* worldPhys =
    new G4PVPlacement(0, G4ThreeVector(0.,0.,0.),
                      worldLog,"World", 0, false, 0);
    
    return worldPhys;
}

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

void ElectronBenchmarkDetector::CreateExitWindow(G4LogicalVolume* worldLog){
    G4double halfLengthWorld = fPosScorer/2.;
    G4double halfThicknessWindow = fPosWindow1/2.;
    G4VSolid* windowSolid = new G4Tubs("windowSolid", 0.*cm, fRadOverall,
                                halfThicknessWindow, 0.*deg, 360.*deg);
    G4LogicalVolume* windowLog = new G4LogicalVolume(windowSolid,
                                     G4Material::GetMaterial("TiAlloy"),
                                                     "windowLog");
    
    fWindowVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    windowLog->SetVisAttributes(fWindowVisAtt);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      halfThicknessWindow - halfLengthWorld),
                      windowLog,"ExitWindow",worldLog,false,0);
}

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

void ElectronBenchmarkDetector::CreatePrimaryFoil(G4LogicalVolume* worldLog){
    G4double halfLengthWorld = fPosScorer/2.;

    // For some energies, we have no Primary Foil.
    if (fHalfThicknessPrimFoil==0.) return;
    
    fSolidPrimFoil = new G4Tubs("PrimFoilSolid", 0.*cm, fRadOverall,
                                fHalfThicknessPrimFoil, 0.*deg, 360.*deg);
    fLogPrimFoil = new G4LogicalVolume(fSolidPrimFoil,
                                       fMaterialPrimFoil, "PrimFoilLog");
    
    fPrimFoilVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    fLogPrimFoil->SetVisAttributes(fPrimFoilVisAtt);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      fPosPrimFoil + fHalfThicknessPrimFoil - halfLengthWorld),
                      fLogPrimFoil,"ScatteringFoil",worldLog,false,0);
}

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

void ElectronBenchmarkDetector::CreateMonitor(G4LogicalVolume* worldLog){
    G4double halfLengthWorld = fPosScorer/2.;
    G4double halfThicknessMon = (fPosMon1 - fPosMon0) /2.;
    G4VSolid* monSolid = new G4Tubs("monSolid", 0.*cm, fRadOverall,
                             halfThicknessMon, 0.*deg, 360.*deg);
    G4LogicalVolume* monLog = new G4LogicalVolume(monSolid,
                                  G4Material::GetMaterial("G4_MYLAR"),
                                                  "monLog");
    
    fMonVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    monLog->SetVisAttributes(fMonVisAtt);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      fPosMon0 + halfThicknessMon - halfLengthWorld),
                      monLog,"MonitorChamber",worldLog,false,0);
}

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

void ElectronBenchmarkDetector::CreateHeliumBag(G4LogicalVolume* worldLog){
    G4double halfLengthWorld = fPosScorer/2.;
    
    // Construct cylinder of Mylar
    G4double halfThicknessBag = (fPosBag1 - fPosBag0) /2.;
    G4VSolid* bagSolid = new G4Tubs("bagSolid", 0.*cm, fRadOverall,
                                    halfThicknessBag, 0.*deg, 360.*deg);
    G4LogicalVolume* bagLog = new G4LogicalVolume(bagSolid,
                                  G4Material::GetMaterial("G4_MYLAR"),
                                                  "bagLog");
    
    fBagVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    bagLog->SetVisAttributes(fBagVisAtt);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      fPosBag0 + halfThicknessBag - halfLengthWorld),
                      bagLog,"HeliumBag",worldLog,false,0);
    
    // Insert cylinder of Helium into the Cylinder of Mylar
    G4double halfThicknessHelium = (fPosHelium1 - fPosHelium0) /2.;
    G4VSolid* heliumSolid = new G4Tubs("heliumSolid", 0.*cm, fRadOverall,
                                halfThicknessHelium, 0.*deg, 360.*deg);
    G4LogicalVolume* heliumLog = new G4LogicalVolume(heliumSolid,
                                     G4Material::GetMaterial("G4_He"),
                                                     "heliumLog");
    
    fHeliumVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    heliumLog->SetVisAttributes(fHeliumVisAtt);
    
    new G4PVPlacement(0, G4ThreeVector(0.,0.,0.),
                      heliumLog,"Helium",bagLog,false,0);
    
    // Insert two rings of Aluminum into the Cylinder of Helium
    G4double halfThicknessRing = fThicknessRing /2.;
    G4VSolid* ringSolid = new G4Tubs("ringSolid", fRadRingInner, fRadOverall,
                                     halfThicknessRing, 0.*deg, 360.*deg);
    G4LogicalVolume* ring0Log = new G4LogicalVolume(ringSolid,
                                    G4Material::GetMaterial("G4_Al"),
                                                    "ring0Log");
    G4LogicalVolume* ring1Log = new G4LogicalVolume(ringSolid,
                                    G4Material::GetMaterial("G4_Al"),
                                                    "ring1Log");
    
    fRingVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    ring0Log->SetVisAttributes(fRingVisAtt);
    ring1Log->SetVisAttributes(fRingVisAtt);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      -halfThicknessHelium + halfThicknessRing),
                      ring0Log,"Ring0",heliumLog,false,0);
    
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                      halfThicknessHelium - halfThicknessRing),
                      ring1Log,"Ring1",heliumLog,false,0);
}

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

void ElectronBenchmarkDetector::CreateScorer(G4LogicalVolume* worldLog){
    G4double halfLengthWorld = fPosScorer/2.;
    G4double halfThicknessScorer = fThicknessScorer /2.;
    
    G4VSolid* scorerSolid = new G4Tubs("scorerSolid", 0.*cm, fRadOverall,
                                halfThicknessScorer, 0.*deg, 360.*deg);
    G4LogicalVolume* scorerLog = new G4LogicalVolume(scorerSolid,
                                     G4Material::GetMaterial("G4_AIR"),
                                                     "scorerLog");
    
    fScorerVisAtt = new G4VisAttributes(G4Colour(0.5,1.0,0.5));
    scorerLog->SetVisAttributes(fScorerVisAtt);
    new G4PVPlacement(0,
                      G4ThreeVector(0.,0.,
                                    halfLengthWorld - halfThicknessScorer),
                      scorerLog,"Scorer",worldLog,false,0);
    
    G4VSolid* scorerRingSolid = new G4Tubs("scorerRingSolid", 0.*cm,
                                           fRadOverall,
                                    halfThicknessScorer, 0.*deg, 360.*deg);
    fScorerRingLog = new G4LogicalVolume(scorerRingSolid,
                         G4Material::GetMaterial("G4_AIR"), "scorerRingLog");
    new G4PVReplica("ScorerRing",fScorerRingLog,scorerLog,kRho,
                    G4int(fRadOverall/fWidthScorerRing),fWidthScorerRing);

    ConstructSDandField();
}

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

// Note that this method is called both at start of job and again after
// any command causes a change to detector geometry
void ElectronBenchmarkDetector::ConstructSDandField()
{
    G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
    
    // G4Cache mechanism is necessary for multi-threaded operation
    // as it allows us to store separate detector pointer per thread
    G4MultiFunctionalDetector*& sensitiveDetector =
    fSensitiveDetectorCache.Get();
    
    if (!sensitiveDetector) {
        sensitiveDetector = new G4MultiFunctionalDetector("MyDetector");
        
        G4VPrimitiveScorer* primitive;
        
        G4SDParticleFilter* electronFilter =
        new G4SDParticleFilter("electronFilter", "e-");
        
        primitive = new G4PSCellFlux("cell flux");
        sensitiveDetector->RegisterPrimitive(primitive);
        
        primitive = new G4PSCellFlux("e cell flux");
        primitive->SetFilter(electronFilter);
        sensitiveDetector->RegisterPrimitive(primitive);
        
        primitive = new G4PSPopulation("population");
        sensitiveDetector->RegisterPrimitive(primitive);
        
        primitive = new G4PSPopulation("e population");
        primitive->SetFilter(electronFilter);
        sensitiveDetector->RegisterPrimitive(primitive);
    }
    G4SDManager::GetSDMpointer()->AddNewDetector(sensitiveDetector);
    SetSensitiveDetector("scorerRingLog",sensitiveDetector);
}

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

void ElectronBenchmarkDetector::SetPrimFoilMaterial(G4String matname){
    fMaterialPrimFoil = G4Material::GetMaterial(matname);
    if (fLogPrimFoil) {
      fLogPrimFoil->SetMaterial(fMaterialPrimFoil);
    }
    else CreatePrimaryFoil(fLogWorld);
    G4RunManager::GetRunManager()->PhysicsHasBeenModified();
}

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

void ElectronBenchmarkDetector::SetPrimFoilThickness(G4double thicknessPrimFoil)
{
    fHalfThicknessPrimFoil = thicknessPrimFoil / 2.;
    if (fSolidPrimFoil) {
      fSolidPrimFoil->SetZHalfLength(fHalfThicknessPrimFoil);
    }
    else CreatePrimaryFoil(fLogWorld);
    G4RunManager::GetRunManager()->GeometryHasBeenModified();
}

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