B2b/src/B2bChamberParameterisation.cc

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0026 //
0027 /// \file B2bChamberParameterisation.cc
0028 /// \brief Implementation of the B2bChamberParameterisation class
0029
0030 #include "B2bChamberParameterisation.hh"
0031
0032 #include "G4SystemOfUnits.hh"
0033 #include "G4ThreeVector.hh"
0034 #include "G4Tubs.hh"
0035 #include "G4VPhysicalVolume.hh"
0036
0037 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0038
0039 B2bChamberParameterisation::B2bChamberParameterisation(G4int noChambers,
0040                                                        G4double startZ,  //  Z of center of first
0041                                                        G4double spacingZ,  //  Z spacing of centers
0042                                                        G4double widthChamber,
0043                                                        G4double lengthInitial, G4double lengthFinal)
0044   : G4VPVParameterisation()
0045 {
0046   fNoChambers = noChambers;
0047   fStartZ = startZ;
0048   fHalfWidth = 0.5 * widthChamber;
0049   fSpacing = spacingZ;
0050   fRmaxFirst = 0.5 * lengthInitial;
0051   if (noChambers > 0) {
0052     fRmaxIncr = 0.5 * (lengthFinal - lengthInitial) / (noChambers - 1);
0053     if (spacingZ < widthChamber) {
0054       G4Exception("B2bChamberParameterisation::B2bChamberParameterisation()", "InvalidSetup",
0055                   FatalException, "Width>Spacing");
0056     }
0057   }
0058 }
0059
0060 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0061
0062 B2bChamberParameterisation::~B2bChamberParameterisation() {}
0063
0064 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0065
0066 void B2bChamberParameterisation::ComputeTransformation(const G4int copyNo,
0067                                                        G4VPhysicalVolume* physVol) const
0068 {
0069   // Note: copyNo will start with zero!
0070   G4double Zposition = fStartZ + copyNo * fSpacing;
0071   G4ThreeVector origin(0, 0, Zposition);
0072   physVol->SetTranslation(origin);
0073   physVol->SetRotation(0);
0074 }
0075
0076 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0077
0078 void B2bChamberParameterisation::ComputeDimensions(G4Tubs& trackerChamber, const G4int copyNo,
0079                                                    const G4VPhysicalVolume*) const
0080 {
0081   // Note: copyNo will start with zero!
0082   G4double rmax = fRmaxFirst + copyNo * fRmaxIncr;
0083   trackerChamber.SetInnerRadius(0);
0084   trackerChamber.SetOuterRadius(rmax);
0085   trackerChamber.SetZHalfLength(fHalfWidth);
0086   trackerChamber.SetStartPhiAngle(0. * deg);
0087   trackerChamber.SetDeltaPhiAngle(360. * deg);
0088 }
0089
0090 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......