The new scintillating fiber detector of E835 at Fermilab

A cylindrical scintillating fiber detector for the measurement of the polar coordinate /spl theta/ has been built for experiment E835 at Fermilab. This is the first detector used in a high-energy physics experiment that exploits scintillating fibers and visible light photon counters (VLPCs). It combines the high granularity, flexibility, and fast response of the scintillating fibers with the high quantum efficiency of the VLPCs. Complete results about tracking resolution, detection efficiency, time resolution, long-term stability, and reliability are given.