An asynchronous version of a binary pixel readout circuit has been implemented in an array with 16 columns at 500 mum pitch and 63 rows at 75 mum pitch. This readout chip has been bonded with solder bumps to a silicon detector with matching pixel elements. Event information in a pixel can be strobed into a local memory by a trigger signal and subsequently read out. WithoUt a Strobe the information in this memory is continuously cleared. The complete hybrid detector has been successfully tested with ionizing particles from a radioactive source. Three such devices have been put in the CERN heavy ion experiment WA94 in the Omega spectrometer where they recorded particle tracks from high multiplicity S-32 interactions.
展开▼
