Small Detector: Central Detector
3 Tracker Doublets
1.1 mm G10, 600 mm Si
r = 14, 42, 71 cm
outer layers extend to z=149 cm
5 EC Tracker disks
z = 31, 61, 91, 121, 149 cm
inner r follows cosq=0.99
Luminosity monitor (Si/W)
‘Vestigial’ mask
cone from r=1.2 cm at z=10 cm to
r=20cm at z=155 cm