CDF muon detection

The muon detection system now being constructed for CDF is briefly described. This system is composed of magnetized iron toroids covering the polar angle range 30 < theta < 170 with respect to both circulating p's and anti p's, and a central muon detector covering +- 350 about 900 to the beams. Muons above about 3 GeV/c psub(perpendicular) are identified at the trigger level by requiring tracks to be straight within the spatial resolution of the trigger hardware and to penetrate 6 lambdasub(a) or more of Fe. At the trigger level the rate is dominated by π → μ decays in flight. An initial trigger rate at 1030 cm-2 sec-1 luminosity of 100 hz for single muons can be decreased to a few hz by using more complete fast pattern recognition. Proposed enhancement of the muon coverage as a part of the detector upgrade is also described. (author)