B2b/src/ChamberParameterisation.cc

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0027 /// \file B2/B2b/src/ChamberParameterisation.cc
0028 /// \brief Implementation of the B2b::ChamberParameterisation class
0029
0030 #include "ChamberParameterisation.hh"
0031
0032 #include "G4SystemOfUnits.hh"
0033 #include "G4ThreeVector.hh"
0034 #include "G4Tubs.hh"
0035 #include "G4VPhysicalVolume.hh"
0036
0037 namespace B2b
0038 {
0039
0040 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0041
0042 ChamberParameterisation::ChamberParameterisation(G4int noChambers,
0043                                                  G4double startZ,  //  Z of center of first
0044                                                  G4double spacingZ,  //  Z spacing of centers
0045                                                  G4double widthChamber, G4double lengthInitial,
0046                                                  G4double lengthFinal)
0047 {
0048   fNoChambers = noChambers;
0049   fStartZ = startZ;
0050   fHalfWidth = 0.5 * widthChamber;
0051   fSpacing = spacingZ;
0052   fRmaxFirst = 0.5 * lengthInitial;
0053   if (noChambers > 0) {
0054     fRmaxIncr = 0.5 * (lengthFinal - lengthInitial) / (noChambers - 1);
0055     if (spacingZ < widthChamber) {
0056       G4Exception("ChamberParameterisation::ChamberParameterisation()", "InvalidSetup",
0057                   FatalException, "Width>Spacing");
0058     }
0059   }
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063
0064 void ChamberParameterisation::ComputeTransformation(const G4int copyNo,
0065                                                     G4VPhysicalVolume* physVol) const
0066 {
0067   // Note: copyNo will start with zero!
0068   G4double Zposition = fStartZ + copyNo * fSpacing;
0069   G4ThreeVector origin(0, 0, Zposition);
0070   physVol->SetTranslation(origin);
0071   physVol->SetRotation(nullptr);
0072 }
0073
0074 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0075
0076 void ChamberParameterisation::ComputeDimensions(G4Tubs& trackerChamber, const G4int copyNo,
0077                                                 const G4VPhysicalVolume*) const
0078 {
0079   // Note: copyNo will start with zero!
0080   G4double rmax = fRmaxFirst + copyNo * fRmaxIncr;
0081   trackerChamber.SetInnerRadius(0);
0082   trackerChamber.SetOuterRadius(rmax);
0083   trackerChamber.SetZHalfLength(fHalfWidth);
0084   trackerChamber.SetStartPhiAngle(0. * deg);
0085   trackerChamber.SetDeltaPhiAngle(360. * deg);
0086 }
0087
0088 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0089
0090 }  // namespace B2b