B2b/src/ChamberParameterisation.cc

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0025 //
0026 /// \file ChamberParameterisation.cc
0027 /// \brief Implementation of the B2b::ChamberParameterisation class
0028
0029 #include "ChamberParameterisation.hh"
0030
0031 #include "G4SystemOfUnits.hh"
0032 #include "G4ThreeVector.hh"
0033 #include "G4Tubs.hh"
0034 #include "G4VPhysicalVolume.hh"
0035
0036 namespace B2b
0037 {
0038
0039 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0040
0041 ChamberParameterisation::ChamberParameterisation(G4int noChambers,
0042                                                  G4double startZ,  //  Z of center of first
0043                                                  G4double spacingZ,  //  Z spacing of centers
0044                                                  G4double widthChamber, G4double lengthInitial,
0045                                                  G4double lengthFinal)
0046 {
0047   fNoChambers = noChambers;
0048   fStartZ = startZ;
0049   fHalfWidth = 0.5 * widthChamber;
0050   fSpacing = spacingZ;
0051   fRmaxFirst = 0.5 * lengthInitial;
0052   if (noChambers > 0) {
0053     fRmaxIncr = 0.5 * (lengthFinal - lengthInitial) / (noChambers - 1);
0054     if (spacingZ < widthChamber) {
0055       G4Exception("ChamberParameterisation::ChamberParameterisation()", "InvalidSetup",
0056                   FatalException, "Width>Spacing");
0057     }
0058   }
0059 }
0060
0061 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0062
0063 void ChamberParameterisation::ComputeTransformation(const G4int copyNo,
0064                                                     G4VPhysicalVolume* physVol) const
0065 {
0066   // Note: copyNo will start with zero!
0067   G4double Zposition = fStartZ + copyNo * fSpacing;
0068   G4ThreeVector origin(0, 0, Zposition);
0069   physVol->SetTranslation(origin);
0070   physVol->SetRotation(nullptr);
0071 }
0072
0073 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0074
0075 void ChamberParameterisation::ComputeDimensions(G4Tubs& trackerChamber, const G4int copyNo,
0076                                                 const G4VPhysicalVolume*) const
0077 {
0078   // Note: copyNo will start with zero!
0079   G4double rmax = fRmaxFirst + copyNo * fRmaxIncr;
0080   trackerChamber.SetInnerRadius(0);
0081   trackerChamber.SetOuterRadius(rmax);
0082   trackerChamber.SetZHalfLength(fHalfWidth);
0083   trackerChamber.SetStartPhiAngle(0. * deg);
0084   trackerChamber.SetDeltaPhiAngle(360. * deg);
0085 }
0086
0087 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0088
0089 }  // namespace B2b