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| dimensions |
Envelope: 752mm in z, 238mm in r for
azimuthal angles between xx and xx, and r=290 elsewhere The barrel is 64 cm long, holding 12 strip detectors. each detector has 256 strips, 200 um pitch. |
| acceptance |
full coverage in azimuthal angle. pseudorapidity coverage: <=2.5 for the barrel, between 1.8 and 2.65 for the pads. |
| channels |
inner barrel: 12 c-modules x 6 in phi x 256
strips/detector= xxx outer barrel: ( 4x6 + 8x2 ) x 256 = xxx pads: 8 detectors in phi x 12 columns x 20 in r = xxx total: 38K channels |
| weight | a few pounds |
| thickness | X0 = 0.61% for tracks traversing 1 silicon detector, and 0.96% for 2 silicon layers. |
| resolution | 2mm in z at the trigger level, ~0.2mm offline |