Re: tof<->problem solved?

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From: W.J. Llope (llope_at_physics.rice.edu)
Date: Fri Mar 07 2003 - 10:59:01 EST

At 9:26 AM -0600 3/7/03, Frank Geurts wrote:
>we are back to the problems caused by very late L2 accepts ...
>apparently Zoran M. is messing with that again.

hmmmm. this started at ~4:20am (zoran sleeping?)
and it was in the middle of a spill
(we had behaved fine in previous runs in the same spill).
maybe some reboot of some daq vme thing was needed too?

(no note in the shift log on any of this yet - grrrrr)

> I'll collect some more stuff from the log files and will contact CR
>later and ask them what's going on. In any case, TOF is *not* the
>problem, it's just the indicator of another problem. More later ...

3rd time this run something like this happened (we get
booted but the problem wasn't on our side)... sigh

>I though of holding it back but I suppose we should come up w/ more
>ammunition now: Bill, can you make a spreadsheet with localmon vs.
>STAR events per day. I will be needing that to convince startrig ...

a spreadsheet might be a bit much just to describe the effects
to startrg. a few sentence summary would go just as far...
how about:

days 24-49, all tof systems running fine.
snow
days 53-55, lots of email traffic about new L2 & DAQ issues.
        day 53, our data looks wierd, #'s make no sense
        day 54-55, we take reasonable-looking data but at
                a fraction of the expected rate. i.e. tof
                "missing" for ~3/4 of the star events.
days >60, all tof systems running fine again. tof not missing
                star events any more...

last night (early day 66), tof had been running fine, but
just after 4 am started 'going red' under run control.
tof detectors and rack equipment show no problems.

how's that? hasta

>
>-f.
>
>
>
>
>
>W.J. Llope wrote:
>>
>>just a guess - based on the fact that in the last ~1 hr
>>someone ran a ped run including us... i see ~1k
>>strobe events in a localmon.dat file that i refreshed
>>a little before 9am EDT....
>>
>>we'll see (they're all in the 10am mtg now)...
>>
>>hasta 

-- 

  W.J. Llope, Ph.D.                      Res. Assoc. Professor
  T.W. Bonner Nuclear Laboratory         phone:  713-348-4741
  Rice University, MS-315                fax:    713-348-5215
  6100 S. Main St.                  
  Houston, TX 77005-1892            
             e-mail:     llope_at_physics.rice.edu
             WWW home:   http://wjllope.rice.edu/default.html

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