TestEm10/src/DetectorSimpleALICE.cc

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0025 //
0026 /// \file DetectorSimpleALICE.cc
0027 /// \brief Implementation of the DetectorSimpleALICE class
0028
0029 #include "DetectorSimpleALICE.hh"
0030
0031 #include "Materials.hh"
0032 #include "SensitiveDetector.hh"
0033
0034 #include "G4Box.hh"
0035 #include "G4FieldManager.hh"
0036 #include "G4LogicalVolume.hh"
0037 #include "G4Material.hh"
0038 #include "G4PVPlacement.hh"
0039 #include "G4Region.hh"
0040 #include "G4SDManager.hh"
0041 #include "G4SystemOfUnits.hh"
0042 #include "G4TransportationManager.hh"
0043 #include "G4UniformMagField.hh"
0044 #include "G4UnitsTable.hh"
0045 #include "G4ios.hh"
0046
0047 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0048
0049 DetectorSimpleALICE::DetectorSimpleALICE() : fRadiatorDescription(0) {}
0050
0051 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0052
0053 DetectorSimpleALICE::~DetectorSimpleALICE()
0054 {
0055   // delete fRadiatorDescription;
0056   // the description is deleted in detector construction
0057 }
0058
0059 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0060
0061 G4VPhysicalVolume* DetectorSimpleALICE::Construct()
0062 {
0063   // Geometry parameters
0064   //
0065
0066   G4cout << "DetectorSimpleALICE setup" << G4endl;
0067
0068   G4double worldSizeZ = 400. * cm;
0069   G4double worldSizeR = 20. * cm;
0070
0071   // Radiator and detector parameters
0072
0073   G4double radThickness = 0.020 * mm;
0074   G4double gasGap = 0.250 * mm;
0075   G4double foilGasRatio = radThickness / (radThickness + gasGap);
0076   G4int foilNumber = 220;
0077
0078   G4double absorberThickness = 38.3 * mm;
0079   G4double absorberRadius = 100. * mm;
0080
0081   G4double windowThick = 51.0 * micrometer;
0082   G4double electrodeThick = 10.0 * micrometer;
0083   G4double gapThick = 10.0 * cm;
0084   G4double detGap = 0.01 * mm;
0085
0086   G4double startZ = 100.0 * mm;
0087
0088   // Materials
0089   //
0090
0091   // Change to create materials using NIST
0092   G4Material* air = Materials::GetInstance()->GetMaterial("Air");
0093   G4Material* mylar = Materials::GetInstance()->GetMaterial("Mylar");
0094   G4Material* xe15CO2 = Materials::GetInstance()->GetMaterial("Xe15CO2");
0095
0096   G4double foilDensity = mylar->GetDensity();
0097   G4double gasDensity = air->GetDensity();
0098   G4double totDensity = foilDensity * foilGasRatio + gasDensity * (1.0 - foilGasRatio);
0099
0100   G4double fractionFoil = foilDensity * foilGasRatio / totDensity;
0101   G4double fractionGas = gasDensity * (1.0 - foilGasRatio) / totDensity;
0102
0103   G4Material* radiatorMat = new G4Material("radiatorMat", totDensity, 2);
0104   radiatorMat->AddMaterial(mylar, fractionFoil);
0105   radiatorMat->AddMaterial(air, fractionGas);
0106
0107   // Radiator description
0108   fRadiatorDescription = new RadiatorDescription;
0109   fRadiatorDescription->fFoilMaterial = mylar;
0110   // CH2; // Kapton; // Mylar ; // Li ; // CH2 ;
0111   fRadiatorDescription->fGasMaterial = air;  // CO2; // He; //
0112   fRadiatorDescription->fFoilThickness = radThickness;
0113   fRadiatorDescription->fGasThickness = gasGap;
0114   fRadiatorDescription->fFoilNumber = foilNumber;
0115
0116   G4Material* worldMaterial = air;  // CO2;
0117   G4Material* absorberMaterial = xe15CO2;
0118
0119   // Volumes
0120   //
0121
0122   G4VSolid* solidWorld = new G4Box("World", worldSizeR, worldSizeR, worldSizeZ / 2.);
0123
0124   G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld, worldMaterial, "World");
0125
0126   G4VPhysicalVolume* physicsWorld =
0127     new G4PVPlacement(0, G4ThreeVector(), "World", logicWorld, 0, false, 0);
0128
0129   // TR radiator envelope
0130
0131   G4double radThick = foilNumber * (radThickness + gasGap) - gasGap + detGap;
0132   G4double radZ = startZ + 0.5 * radThick;
0133
0134   G4VSolid* solidRadiator =
0135     new G4Box("Radiator", 1.1 * absorberRadius, 1.1 * absorberRadius, 0.5 * radThick);
0136
0137   G4LogicalVolume* logicRadiator = new G4LogicalVolume(solidRadiator, radiatorMat, "Radiator");
0138
0139   new G4PVPlacement(0, G4ThreeVector(0, 0, radZ), "Radiator", logicRadiator, physicsWorld, false,
0140                     0);
0141
0142   fRadiatorDescription->fLogicalVolume = logicRadiator;
0143
0144   // create region for window inside windowR for
0145
0146   G4Region* radRegion = new G4Region("XTRradiator");
0147   radRegion->AddRootLogicalVolume(logicRadiator);
0148
0149   // Absorber
0150
0151   G4VSolid* solidAbsorber =
0152     new G4Box("Absorber", absorberRadius, absorberRadius, absorberThickness / 2.);
0153
0154   G4LogicalVolume* logicAbsorber = new G4LogicalVolume(solidAbsorber, absorberMaterial, "Absorber");
0155
0156   G4double windowZ = startZ + radThick + windowThick / 2. + 15.0 * mm;
0157   G4double gapZ = windowZ + windowThick / 2. + gapThick / 2. + 0.01 * mm;
0158   G4double electrodeZ = gapZ + gapThick / 2. + electrodeThick / 2. + 0.01 * mm;
0159   G4double absorberZ = electrodeZ + electrodeThick / 2. + absorberThickness / 2. + 0.01 * mm;
0160
0161   new G4PVPlacement(0, G4ThreeVector(0., 0., absorberZ), "Absorber", logicAbsorber, physicsWorld,
0162                     false, 0);
0163
0164   G4Region* regGasDet = new G4Region("XTRdEdxDetector");
0165   regGasDet->AddRootLogicalVolume(logicAbsorber);
0166
0167   // Sensitive Detectors: Absorber
0168
0169   SensitiveDetector* sd = new SensitiveDetector("AbsorberSD");
0170   G4SDManager::GetSDMpointer()->AddNewDetector(sd);
0171   logicAbsorber->SetSensitiveDetector(sd);
0172
0173   // Print geometry parameters
0174
0175   G4cout << "\n The  WORLD   is made of " << worldSizeZ / mm << "mm of "
0176          << worldMaterial->GetName();
0177   G4cout << ", the transverse size (R) of the world is " << worldSizeR / mm << " mm. " << G4endl;
0178   G4cout << " The ABSORBER is made of " << absorberThickness / mm << "mm of "
0179          << absorberMaterial->GetName();
0180   G4cout << ", the transverse size (R) is " << absorberRadius / mm << " mm. " << G4endl;
0181   G4cout << " Z position of the (middle of the) absorber " << absorberZ / mm << "  mm." << G4endl;
0182
0183   G4cout << "radZ = " << radZ / mm << " mm" << G4endl;
0184   G4cout << "startZ = " << startZ / mm << " mm" << G4endl;
0185
0186   G4cout << "fRadThick = " << radThick / mm << " mm" << G4endl;
0187   G4cout << "fFoilNumber = " << foilNumber << G4endl;
0188   G4cout << "fRadiatorMat = " << radiatorMat->GetName() << G4endl;
0189   G4cout << "WorldMaterial = " << worldMaterial->GetName() << G4endl;
0190   G4cout << G4endl;
0191
0192   return physicsWorld;
0193 }
0194
0195 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......