User name E.Chudakov
Log entry time 01:24:13 on March10,2005
Entry number 141019
keyword=HV settings on BigBite
The HV could be changed only for E and DE detectors.
The script analyzing the data provided 10dim histograms
with some recommendation for the amplitude change.
The AUX detectors were presented only with scatter plots
on which we could not see any signal.
In order to change the HV values a couple of scripts were used.
The location of the scripts as well as the tables of the old
and new HV values are located in: /adaqfs/adaq/gen/bb/
The channel are enumerated from 1 to 156
(all 13 slots in the BB crate)
dv_bb.0 - initial values
dv_bb.3 - first useful iterration
dv_bb.4 - the 2-nd iterration
One can read the current HV values using a script:
./getval.com bb DV
The files dv_bb.3 was written using:
./getval.com bb DV > dv_bb.3
Then one can:
cp dv_bb.3 dv_bb.upd.3
edit dv_bb.upd.3 (one may leave only the channels one wants to update)
./setval.com bb DV dv_bb.upd.3 - to upload the voltages to EPICS