A plastic-BaF/sub 2/ phoswich telescope for charged/neutral particle and photon detection

BaF/sub 2/ has become a very versatile scintillator for particle and photon detection commonly applied in medium and high energy physics experiments. The intrinsic properties allow particle identification via time-of-flight, /spl Delta/E-E and pulse-shape techniques. A new NE102A-BaF/sub 2/ phoswich detector using the standard TAPS crystals has been tested at relativistic energies. The drastically improved particle identification and first results obtained with a large annular forward wall consisting of 120 phoswich modules with 15 mm NE102A attached to the BaF/sub 2/-crystal will be discussed in detail.