<br><br><div class="gmail_quote">On Tue, Oct 19, 2010 at 4:15 PM, Brad Sawatzky <<a href="mailto:brads@jlab.org">brads@jlab.org</a>> wrote:<br><blockquote class="gmail_quote">
<div class="im">On Tue, 19 Oct 2010, <a href="mailto:posik@jlab.org">posik@jlab.org</a> wrote:<br>
<br>
> I have been doing a finer skim of the BigBite production list and<br>
> found about 30 runs (1858-1882) where bbps1:2002 S10, L10.0 was turned<br>
> on, but should have been turned off. I was wondering what the bbps1<br>
> refers to and if it being switched on would cause those 30 or so runs<br>
> to be no good?<br>
<br>
</div>bbps1:2002 was a BigBite PortServer that controlled one of our high<br>
voltage crates. Something ON when it should have been OFF is usually<br>
not a problem. (Sometimes we turned off some HV channels to help<br>
protect the system during beam tuning, etc. If we forgot, the system<br>
would typically just trip -- no big deal.)<br>
<br>
If it was OFF and should have been ON, then yes, that could be a<br>
problem -- it all depends was being powered by Slot 10, channel 0<br>
in that crate.<br>
<br>
All the HVs get written to the Halog Start of Run entries. I looked<br>
through a random sample in the range you list and don't see anything we<br>
would care about that is turned off.<br>
<br>
It's also weird that the comment only mentions is a single channel.<br>
Fatiha turned this on, presumably in response to this auto-logged<br>
warning:<br>
<a href="http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227065935.html">http://www.jlab.org/~adaq/halog/html/0902_archive/090227065935.html</a><br>
<a href="http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227071752.html">http://www.jlab.org/~adaq/halog/html/0902_archive/090227071752.html</a><br>
Then Diana turned it back off<br>
<a href="http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227213718.html">http://www.jlab.org/~adaq/halog/html/0902_archive/090227213718.html</a><br>
<br>
I think the wire chamber warning was a spurious comm problem (HVs look<br>
good) and had nothing to do with the HV channel that Fatiha turned on.<br>
It may be that nothing was plugged into that channel at all...<br>
<br>
Is there any indication the runs are no good (missing channels, etc)?<br>
<br></blockquote><div>I looked through the Halog and the run data base and there was nothing saying they were no good. I replayed one of the runs 1870 and everything looks ok. <br><br> <br></div><blockquote class="gmail_quote">
-- Brad<br>
<font color="#888888"><br>
--<br>
Brad Sawatzky, PhD <<a href="mailto:brads@jlab.org">brads@jlab.org</a>> -<>- Jefferson Lab / Hall C / C111<br>
Ph: 757-269-5947 -<>- Fax: 757-269-5235 -<>- Pager: <a href="mailto:brads-page@jlab.org">brads-page@jlab.org</a><br>
The most exciting phrase to hear in science, the one that heralds new<br>
discoveries, is not "Eureka!" but "That's funny..." -- Isaac Asimov<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Matthew Posik<br>Email: <a href="mailto:posik@temple.edu">posik@temple.edu</a><br>Temple University Physics Dept.<br>Office: BA-319<br>Office #: 215-204-1331 <br>
WebSites:<br>Temple:<br><a href="http://quarks.temple.edu/">http://quarks.temple.edu/</a><br>d2n:<br><a href="http://hallaweb.jlab.org/experiment/E06-014/">http://hallaweb.jlab.org/experiment/E06-014/</a><br><br>