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User name R. Michaels
Log entry time 22:58:54 on February 06, 2014
Entry number 385911
keyword=L-HRS HV status -- working, but somewhat flakey
At the moment, the L-HRS HV is back on and the target voltages restored
from a file I saved this afternoon.
The readback voltages look ok, except for card 0, which looks strange.
At about 3 pm today, Jack and I investigated why the laptop could not
talk to the HV crate, which the intelPC (intelha3) could. After
examining signals, we decided to try to swap out the serial card on the
crate. Chuck did this work and I tested it using the low-level C code.
At first, this seemed ok. However, it turns out there is a small
probability that the card returns an empty string, and when this happens
(as is already well known) the Java GUI segfaults. This was happening
whether intelha3 or the laptop (ahut1) was host.
I had to go somewhere, but came back at 9:30 pm, and found to my surprise
that the HV works now -- well, mostly. I can get the Java GUI to come
up, but on some trials it segfaulted. It seems like if it gets through the
initialization phase, it works fine -- as long as I've been able to
That's where we are at the moment. I'll leave the HV on overnight, with
the usual intelha3 host.
A copy of this log entry has been emailed to: mlong,segal,camsonne,kalyan,bogdanw,rom,romanip