The use of content addressable memories in the level 2 trigger for the CLAS detector at CEBAF

Journal Article · Thu Feb 01 04:00:00 EST 1996 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.486014· OSTI ID:212111

Doughty, Jr, D C; Hodson, R F; Allgood, D; Bickley, M; Campbell, S; Putnam, T; Spivak, R; Lemon, S; Wilson, W C

The LEVEL 2 trigger in the CLAS detector will find tracks and associate a momentum and angle with each track within 2 {micro}s after the event. This is done through a hierarchical track finding design in which track segments are found in each drift chamber axial superlayer. An array of 384 custom content addressable (or associative) memories (CAMs) uses independent subfield matching to link these track segments into roads. The track parameters corresponding to each found road are then looked up in a separate memory. The authors present the overall architecture of the LEVEL 2 trigger, the details of how the CAM chip links tracks segments to find roads, and report on the performance of the prototype CAM chips.

• OSTI ID: 212111
• Report Number(s): CONF-950534--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 1Pt1 Vol. 43; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CEBAF ACCELERATOR
CHARGED PARTICLE DETECTION
CHERENKOV COUNTERS
DESIGN
DRIFT CHAMBERS
MEMORY DEVICES
PARTICLE TRACKS
PERFORMANCE
RADIATION DETECTORS
SCINTILLATION COUNTERS
SHOWER COUNTERS
TIME RESOLUTION
TRIGGER CIRCUITS