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User name V. Sulkosky
Log entry time 09:54:46 on August 12, 2008
Entry number 242023
keyword=S2m and A1 HV Problems Addressed
There were two problematic HV channels one each for the S2m and A1
detectors that have been addressed. For the A1 detector, the 1461P card
in slot # 14 has a problem with channel 2. Youcai Wang and I found a few
spare 1461P cards in the Physics storage building. We swapped out the
card in slot # 14 with one of these cards. The "new" card appears to work
fine.
When the HV was turned on for the sixth channel on the left side of S2m,
the current readback for the HV remained at zero. We traced this to a bad
HV cable. I suspect one or both of the connectors has a problem. We
replaced the 'L6' HV cable with a new one. The current readback is now
similar to the other S2m channels.
A copy of this log entry has been emailed to: ycwang@jlab.org,segal@jlab.org,jiang@jlab.org