Compter deadtime and buffered mode

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User name M Jones

Log entry time 14:48:07 on November 08, 2007

Entry number 144613

keyword=Compter deadtime and buffered mode

During beam studies , I set the threshold on bigcal to -50mV to get some
trigger rate. With the changes to the sfigep1 and sfigep2 crl code the
computer deadtime decreased in the unbuffered mode to a more reasonable
10% at 1kHz. With buffered mode, the deadtime decrease by roughly a factor
of two. When in buffered mode didn't problems with extra flags in Roc 13
or roc14. So maybe it has something to do with the rates on the FPP
chambers. We had no target in during beam studies so the rate in the HMS
hut was low.

I put the threshold on bigcal back to -350 ( -380 in readback).