e+e- COLLIDER DETECTOR Revised 3/2001 - DESIGN S2

Component

Radius (cm)

Min

Max

Axial (cm) Z| 

Min

Max

Technology

Performance
Vertex Detectors (layer 1) 1.2   -2.5 2.5 CCD 4.5u+5.5 u /psin3/2
Vertex Detectors (layer 2-5) 2.4, 3.6, 4.8, 6   -12.5 12.5 CCD 4.5u+5.5 u /psin3/2
Central Tracking 14

15

42

43

70

71

   -31

-31

-89

-89

-147

-147

 31

31

89

89

147

147

 Si strips (delta)/P2~6x10-5 high p

(delta)P/P~0.4% low p
Forward Tracking 4.4

7.7

11.1

14.4

17.5

 15.1

29.6

44.1

58.6

72.5

 +/- 31

+/- 61

+/- 91

+/- 121

+/- 149

 

 

 

 

 

 Si discs (delta)/P2~6x10-5 high p

(delta)P/P~0.4% low p

EM Calorimeter 

Barrel
End Cap
 
78
24
 
103
70
 
-180
152.5
 
180
177.5
Tungsten/Si pads (delta)E/E~ 12%/(root) E +1%
Coil Magnet 129 158 -178 178 SC Solenoid

~1/2 (lambda) thick

 6 Tesla

Hadron Calorimeter
Barrel
End Cap
 
188
26
 
286.8
178
 
-269
189
 
269
287.8
Cu/Scintillator (delta)E/E~50%/(root)E +2%

Muon Detector
Barrel
End Cap
 
300
25
 
420
303
 
-298
298
 
298
418
Fe/gas  
Luminosity Monitor 6 15 151 176 Tungsten/Si   

 

Vertex Dector - as in Snowmass

    5 layers of CCD's                      0.12 -- per xo layer

           radii of layer    1                 1.2cm, +/-  2.5 cm long

                                      2                2.4cm, +/- 5 cm long

                                      3                 3.6cm, +/- 7.5 cm long

                                     4                 4.8cm, +/- 10 cm long

                                      5                 6.0cm, +/- 12.5 cm long

           CCD's                 20 u x 20u pixels

                                      point error ~ 5u

Central Tracker

           Silicon u strips 

           Layer              1                    14cm 1=  +/- 1.2m

                                  2                     15

                                  3                     42

                                  4                     43

                                  5                     70

                                  6                     71

        1% of Xo per layer

EM Calorimeter

            Tungsten/Silicon pad readout

            Tungsten xo = 0.35cm, (lambda) =9.6cm

            Structure:

                    50 layers:                 2 mm Tungsten

            total thickness 25cm

                    100 mm of Tungsten/3.5mm = 29 xo total,~ 1(lambda) 

            segmentation             1.5 cm x 1.5 cm pads

                                                 1.5 mrad x 15 mrad

                                                 50 longitudinal layers

Hadronic Calorimeter

            Copper/Scintillator towers

                    Cu     (lambda) =14.8cm

            Copper

            38 layers of: 20mm Copper

                                     5mm Scintillator

             total thickness 95 cm = 5.1  lambda

         EM + Had Calorimter                 6.1 lambda

        Segmentation of HCal

                        Transverse      40 mrad x 40 mrad

                        Longitudinal - 3 segments

Muon detectors - 10 Iron plates, 10 cm thick each

        10 cm thick Fe plates with gas chambers inside in 2 cm gaps.

         Continus pad structure of hadron calorimeter for tailcatcher.

        Position resolution

                    10 layers - 1 cm in theta direction

                    2 layers   - 1 cm in Z direction

Last Modified: 01/13/04 12:37