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User name R. Michaels
Log entry time 14:08:03 on August 23, 2009
Entry number 285466
keyword=PREX Quartz off or unplugged
PREX Quartz does not appear in ADCs or TDCs.
Its supposed to be in the 2nd Cerenkov channel (R-HRS).
The 1st and 3rd channels (HAPPEX and PREX-scint) do
show up, so there isn't anything grossly wrong at the
The xscaler display is showing ~0.3 Hz at 20 uA but at that level
it could simply be crosstalk from an adjacent channel.
Tentative conclusion is that either the HV is off or the
signal is not plugged into the discriminator. I'd check
there on a scope first.
A copy of this log entry has been emailed to: mcnulty,kkumar