Perhaps there is something flaky with the left FASTBUS crate power supply;
maybe one of the DC voltages drifts sometimes, causes the TDCs to register
overflows rather than valid times, and power-cycling the crate resets
it. Although I've looked at the front panel meter, and not seen anything
wrong...
There's a repaired power supply on its way back from New Mexico, and we
could try to swap that in if this problem persists.
Karen
At 08:10 PM 12/8/2003 -0500, you wrote:
>Operators: adrian tancredi nikolas
>
>Hall was open between 3 and 6 PM.
>A broken wire from the right WC was fixed.
>
>All runs taken before are being crunched...
>Left TOF TDCs disappeared again right before 8 PM. Tancredi power cycled
>the crate - that brought TDCs back. Maybe this was just overheating?...
>
>Looking at the runs we took over the weekend, we realized most of them
>were OK. The problem was that after run 3629 the left TOF TDCs had lots of
>overflows (good data was there too, so analysis should be OK) and that
>threw off the fit of the TOF monitor, resulting in data points all over
>the place... we do not know why we had those overflows (hot channels?)...
>
>Adrian
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