Peak-sensing discriminator for multichannel detectors with cross-talk

In view of handling the anode signals from the position-sensitive photomult iplier a new front-end electronic circuit has been designed and realized, w hich allows one to suppress annoying effects of the cross-talk between adja cent channels. The circuit was tested in association with a scintillating f ibre detector in a test beam at CERN. The basic performances, such as the d etection efficiency and its uniformity, as well as the hit multiplicity for single tracks were compared to those of the conventional electronics based on the simple threshold discriminators. A great advantage of the peak-sens ing circuit was experimentally demonstrated, in particular, in its real-tim e digitization of the track position without significant ambiguity of the t rack position due to the cross-talk, (C) 2000 Elsevier Science B.V. All rig hts reserved.