A POSITION-SENSITIVE CATHODE STRIP DETECTOR WITH SINGLE STRIP READOUT

The detector presented is a special kind of MWPC combined with a scint illator and is used for nuclear spectroscopy at the Munich Q3D magneti c spectrograph. It allows both identification and position determinati on of the incident particles, The position is derived from the charge distribution influenced on a few neighboring cathode strips which are read out individually, During data acquisition the position is calcula ted with the center of gravity method, This reduces the dead time per event to about 60 mu s but causes a systematic error. This is eliminat ed later in a replay, which calculates the position by fitting the cha rge distribution, With this method the position precision is better th an 0.1 mm.