3 ////////////////////////////////////////////////
4 // Manager and hits classes for set: TRD //
5 ////////////////////////////////////////////////
7 #include "AliDetector.h"
10 class AliTRD : public AliDetector {
14 Int_t fGasMix; // Gas mixture. 0: Xe/Isobutane 1: Xe/CO2
15 Int_t fSensSelect; // Switch to select only parts of the detector
16 Int_t fSensPlane; // Sensitive detector plane
17 Int_t fSensChamber; // Sensitive detector chamber
18 Int_t fSensSector; // Sensitive detector sector
22 AliTRD(const char *name, const char *title);
24 virtual void AddHit(Int_t, Int_t*, Float_t*);
25 virtual void BuildGeometry();
26 virtual void CreateMaterials();
27 Int_t DistancetoPrimitive(Int_t px, Int_t py);
29 virtual Int_t IsVersion() const =0;
30 virtual void StepManager()=0;
31 virtual void SetGasMix(Int_t imix = 0);
32 virtual void SetSensPlane(Int_t iplane = 0);
33 virtual void SetSensChamber(Int_t ichamber = 0);
34 virtual void SetSensSector(Int_t isector = 0);
36 ClassDef(AliTRD,1) // Transition Radiation Detector base class
39 ////////////////////////////////////////////////
41 ////////////////////////////////////////////////
43 const Int_t nsect = 18; // Number of sectors in the full detector
44 const Int_t nmodul = 6; // Number of modules in each sector
45 const Int_t ncham = 6; // Number of different chambers
46 const Int_t narmsec = 5; // Number of sectors in one arm (geometry 1)
48 const Float_t rmin = 294.0; // r-dimensions of the TRD-frame
49 const Float_t rmax = 368.0;
51 const Float_t zmax1 = 378.35; // z-dimensions of the TRD-frame
52 const Float_t zmax2 = 302.0;
54 const Float_t zleni = 110.0; // z-dimension of the inner chamber
55 const Float_t zlenn = 156.0; // z-dimension of the neighbouring chambers
56 const Float_t zleno = 156.0; // z-dimension of the outer chambers
58 const Float_t widpl1 = 99.6; // rphi-dimension of the innermost plane
60 const Float_t alframe = 1.0; // Thickness of the aluminium of the support frame
62 const Float_t ccframe = 1.0; // Thickness of the carbon chamber frame
64 // Thicknesses of the the material layers
65 const Float_t sethick = 0.02; // Radiator seal
66 const Float_t rathick = 4.2; // Radiator
67 const Float_t pethick = 0.20; // PE-layer in the radiator
68 const Float_t mythick = 0.005; // Mylar-layer
69 const Float_t xethick = 3.5; // Gas mixture
70 const Float_t cuthick = 0.001; // Pad plane
71 const Float_t suthick = 0.06; // HEXCEL+G10 support structure (= 0.31% X0)
72 const Float_t fethick = 0.0044; // FEE + signal lines (= 0.31% X0)
73 const Float_t cothick = 0.02; // PE of the cooling device
74 const Float_t wathick = 0.01; // Cooling water
76 // Position of the material layers
77 const Float_t sezpos = -5.657; // Radiator seal
78 const Float_t razpos = -3.557; // Radiator
79 const Float_t pezpos = 0.0; // PE-layer in the radiator
80 const Float_t myzpos = -1.4545; // Mylar-layer
81 const Float_t xezpos = 0.298; // Gas mixture
82 const Float_t cuzpos = 2.047; // Pad plane
83 const Float_t suzpos = 3.046; // HEXCEL+G10 support structure
84 const Float_t fezpos = 4.0482; // FEE + signal lines
85 const Float_t cozpos = 4.1504; // PE of the cooling devices
86 const Float_t wazpos = 4.3004; // Cooling water
88 ////////////////////////////////////////////////
89 // Parameter for the energy loss calculation
90 ////////////////////////////////////////////////
92 const Float_t kPoti = 12.1; // First ionization potential (eV)
93 const Float_t kEend = 50000.0; // Maximum energy (50 keV);
95 //_____________________________________________________________________________
96 class AliTRDhit : public AliHit {
99 Int_t fSector; // TRD sector number
100 Int_t fChamber; // TRD chamber number
101 Int_t fPlane; // TRD plane number
102 Float_t fQ; // Charge created by a hit (geometry 2)
106 AliTRDhit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits);
107 virtual ~AliTRDhit() {}
109 ClassDef(AliTRDhit,1) // Hits for Transition Radiation Detector