[d2n-analysis-talk] bbps1 question

[MATTHEW R POSIK]

On Tue, Oct 19, 2010 at 4:15 PM, Brad Sawatzky <brads at jlab.org> wrote:

> On Tue, 19 Oct 2010, posik at jlab.org wrote:
>
> > I have been doing a finer skim of the BigBite production list and
> > found about 30 runs (1858-1882) where bbps1:2002 S10, L10.0 was turned
> > on, but should have been turned off. I was wondering what the bbps1
> > refers to and if it being switched on would cause those 30 or so runs
> > to be no good?
>
> bbps1:2002 was a BigBite PortServer that controlled one of our high
> voltage crates.  Something ON when it should have been OFF is usually
> not a problem.  (Sometimes we turned off some HV channels to help
> protect the system during beam tuning, etc.  If we forgot, the system
> would typically just trip -- no big deal.)
>
> If it was OFF and should have been ON, then yes, that could be a
> problem -- it all depends was being powered by Slot 10, channel 0
> in that crate.
>
> All the HVs get written to the Halog Start of Run entries.  I looked
> through a random sample in the range you list and don't see anything we
> would care about that is turned off.
>
> It's also weird that the comment only mentions is a single channel.
> Fatiha turned this on, presumably in response to this auto-logged
> warning:
>  http://www.jlab.org/~adaq/halog/html/0902_archive/090227065935.html<http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227065935.html>
>  http://www.jlab.org/~adaq/halog/html/0902_archive/090227071752.html<http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227071752.html>
> Then Diana turned it back off
>  http://www.jlab.org/~adaq/halog/html/0902_archive/090227213718.html<http://www.jlab.org/%7Eadaq/halog/html/0902_archive/090227213718.html>
>
> I think the wire chamber warning was a spurious comm problem (HVs look
> good) and had nothing to do with the HV channel that Fatiha turned on.
> It may be that nothing was plugged into that channel at all...
>
> Is there any indication the runs are no good (missing channels, etc)?
>
> 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.



> -- Brad
>
> --
> Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
> Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
> The most exciting phrase to hear in science, the one that heralds new
>  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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-- 
Matthew Posik
Email: posik at temple.edu
Temple University Physics Dept.
Office: BA-319
Office #:  215-204-1331
WebSites:
Temple:
http://quarks.temple.edu/
d2n:
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