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B2bChamberParameterisation.cc
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29 
30 #include "B2bChamberParameterisation.hh"
31 
32 #include "G4VPhysicalVolume.hh"
33 #include "G4ThreeVector.hh"
34 #include "G4Tubs.hh"
35 #include "G4SystemOfUnits.hh"
36 
37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
38 
39 B2bChamberParameterisation::B2bChamberParameterisation(
40  G4int noChambers,
41  G4double startZ, // Z of center of first
42  G4double spacingZ, // Z spacing of centers
43  G4double widthChamber,
44  G4double lengthInitial,
45  G4double lengthFinal )
46  : G4VPVParameterisation()
47 {
48  fNoChambers = noChambers;
49  fStartZ = startZ;
50  fHalfWidth = 0.5*widthChamber;
51  fSpacing = spacingZ;
52  fRmaxFirst = 0.5 * lengthInitial;
53  if( noChambers > 0 ){
54  fRmaxIncr = 0.5 * (lengthFinal-lengthInitial)/(noChambers-1);
55  if (spacingZ < widthChamber) {
56  G4Exception("B2bChamberParameterisation::B2bChamberParameterisation()",
57  "InvalidSetup", FatalException,
58  "Width>Spacing");
59  }
60  }
61 }
62 
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64 
65 B2bChamberParameterisation::~B2bChamberParameterisation()
66 { }
67 
68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69 
70 void B2bChamberParameterisation::ComputeTransformation
71 (const G4int copyNo, G4VPhysicalVolume* physVol) const
72 {
73  // Note: copyNo will start with zero!
74  G4double Zposition = fStartZ + copyNo * fSpacing;
75  G4ThreeVector origin(0,0,Zposition);
76  physVol->SetTranslation(origin);
77  physVol->SetRotation(0);
78 }
79 
80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
81 
82 void B2bChamberParameterisation::ComputeDimensions
83 (G4Tubs& trackerChamber, const G4int copyNo, const G4VPhysicalVolume*) const
84 {
85  // Note: copyNo will start with zero!
86  G4double rmax = fRmaxFirst + copyNo * fRmaxIncr;
87  trackerChamber.SetInnerRadius(0);
88  trackerChamber.SetOuterRadius(rmax);
89  trackerChamber.SetZHalfLength(fHalfWidth);
90  trackerChamber.SetStartPhiAngle(0.*deg);
91  trackerChamber.SetDeltaPhiAngle(360.*deg);
92 }
93 
94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......