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User name V. Sulkosky
Log entry time 11:36:11 on February 09, 2011
Entry number 346209
Followups:
keyword=BB dE and E-plane Thresholds (?)
This morning I noticed that the dE and E-plane thresholds appeared to be
set to -8 mV giving a rate of 80 Hz and 1500 Hz for the dE and E plane
triggers. I guess this has been this way since the last time the camac
crate was port scanned over the weekend. The wire chamber thresholds were
still set correctly.
I changed the thresholds to -50 mV for both E and dE. The E-plane rate
doubled to about 160 Hz and the dE rate went up to 6 kHz. I tried to set
the dE rate to -100 mV, but it instead claimed to have set it to -36 mV.
However the rate for dE dropped down to 1.8 kHz instead.
I am confused on what the threshold software is doing. Perhaps there is a
bug in the code. It also sometimes takes several minutes for the code to
complete getting or setting the thresholds.
A copy of this log entry has been emailed to: nmuangma,lselvy,brads