A cylindrical scintillating fiberdetector for the measurement of the polar coordinate 9 has been built for experiment E835 at Fermilab. This is the firstdetector used in a high-energy-physics experiment which exploits scintillating fibers and Visible Light Photon Counters. It combines the high granularity, flexibility and fast response of the scintillating fibers with the high quantum efficiency of the Visible Light Photon Counters (VLPC). Complete results about tracking resolution, detection efficiency time resolution, long term stability and reliability are given.
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