Detection of high momentum particles with identification of the final state

Two detectors for PEP are described which will measure and identify charged particles with good momentum resolution in the range 0.2 - 15 GeV/c. Complete identification is attempted for almost all charged hadrons as well as for a significant fraction of electrons, muons, and photons. In this way, events involving high momentum particles can be studied nearly completely. Whereas both detectors use solenoidal magnets with Cherenkov and time of flight counters and drift chambers, the more favorable design assumes light sensitive detectors operating within a magnetic field. A comparison to the detector designed by the 1974 group is made, and ideas suggesting substitutions for part of this apparatus are discussed