Detector requirements

Match tracks from the central arms and the muon arms to hits in multiple layers in the silicon detector
Position resolution sufficient to resolve secondary vertices of charm and beauty decays, i.e. 30-50 mm
For mid-rapidity tracks, spatial resolution needs to be predominantly in the r-f plane, for tracks at forward rapidities, good resolution in z is required.
The detector must match acceptances of the current and proposed central arm and muon arm detectors.
The detector should be thin. The desire is to achieve 1% of a radiation length, including electronics, cooling and support structure.

Match tracks from the central arms and the muon arms to hits in multiple layers in the silicon detector