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Dawson, J.W.; Byrum, K.L.; Haberichter, W.N.; Nodulman, L.J.; Wicklund, A.B.; Turner, K.J.; Gerdes, D.W.
Argonne National Lab., IL (United States). Funding organisation: USDOE, Washington, DC (United States)1993
Argonne National Lab., IL (United States). Funding organisation: USDOE, Washington, DC (United States)1993
AbstractAbstract
[en] As part of the upgrade program at CDF, electronics has been built to bring the shower max (CES) and preshower (CPR) data into the trigger at level 2. After each crossing, 384 bits from shower max and 192 from the preshower wires are latched. Data from tracks are bussed to this module to provide the wire address and momentum which are then successively compared to the wire data in large look-up tables. Approximately 50 nanoseconds is required to determine a match, write the results in FIFO, and make the results available to track memory. Monte Carlo analysis has indicated that an increase in efficiency of a factor of three in triggering on b decays will be achieved with this hardware
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1993; 5 p; 5. annual international industrial symposium on the Super Collider and exhibition; San Francisco, CA (United States); 6-8 May 1993; CONF-930537--88; CONTRACT W-31109-ENG-38; Also available from OSTI as DE93017461; NTIS; US Govt. Printing Office Dep
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