Title :
A fast and programmable trigger processor for ring image Cherenkov detectors
Author :
Baur, Roland ; Gläb, Joachim ; Männer, Reinhard
Author_Institution :
Heidelberg Univ., Germany
Abstract :
A systolic processor array has been developed as a second level trigger for RICH detectors. A pattern recognition of the two-dimensional readout image is performed within 45 μs. In a multistep correlation process, distant e+e- pairs are recognized and close rings (e.g., from photon conversions) are rejected. The processor is built up with 28500 processing elements which are integrated in 440 VLSI chips. The trigger efficiency for open pairs in p-nucleus collisions is 68% with a rejection factor of 100
Keywords :
Cherenkov counters; VLSI; nuclear electronics; pattern recognition; physics computing; systolic arrays; trigger circuits; (p, X); 45 mus; RICH detectors; VLSI chips; close rings; fast trigger processor; multistep correlation process; open pairs; pattern recognition; photon conversions; positron+electron pairs; programmable trigger processor; rejection factor; ring image Cherenkov detectors; second level trigger; systolic processor array; trigger efficiency; two-dimensional readout image; Counting circuits; Detectors; Electrons; Flip-flops; Image converters; Mesons; Pattern recognition; Pixel; Production; Very large scale integration;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301242
