Subject: eve shift 7 Jan 00
From: Vivian O'Dell (email@example.com)
Date: Fri Feb 04 2000 - 15:09:48 CST
Evening Shift 7 Jan 00
On Shift: Sydney,Marj
Hours of beam available at all intensities: 7.0
Hours of beam available at nominal intensity: 7.0
Hours of E799 data (special runs not included): 6.0
Hours of special runs (laser scans, muon runs...): 0.1
Accounting of lost time:
KFRENDs, Pipeline reset, starting and stopping runs
Tapes brought to FCC this shift: None
Accesses during shift: None
Runs ended this shift:
15427 E799 data 19M events
15430 Muon run, 100K events
15431 E799 data, 1.1M events but DC1 T0's are bad
15432 E799 data 2.6M events
15433 E799 data, ongoing
Overview of shift: Fairly smooth E799 data. A rash of lost permits
around 21:00, the problem went away with multiple KFRENDs. Also took
a muon run (with BA HV's as per Mike Arenton), changed NM4AN polarity
to positive. The new T0's loaded around 18:00 had a problem, went back
to old file.
Rick K put quartz bar into BA33 channel.
Description of Shift:
run spill time comment
15427 Run ongoing as shift starts.
15427 370,371 KTEVANA errors, KFREND
372 pipeline errors, reset pipline several times
380 resume data-taking after pipeline reset
15427 394-400 17:00 beam off for several spills, then returns
15427 405-406 17:15 Ktevana errors again, KFREND
15427 17:35 Beam off, linac klystron problems, no est.
End run, load new tapes, prepare for muon run,
NM4AN changed to positive.
18:00 Load new T0's while beam is off.
15430 19:00 beam returns, muon run, 3 spills
15431 19:20 Beam 799 data!
19:30 Most displays are hosed, run Fix_display
Need to drt_fresh_start at next start of run
15431 20:00 End 15431, DC1 had very low efficiency. Traced to
bad T0's in the new file, reload T0's from run 15268
15432 20:10 Start new run, now DC eff's look OK.
15432 64-74 21:25 Trigger hangs, multiple KFREND's, power
cycles, disable triggers, re-enable, then
triggers work. Continue taking data.
15432 21:45 Rick K thinks he smells smoke, but we find
nothing. It did appear, however, that ktev2 had
stopped processing. End run and drt_fresh_start.
15433 22:00 Start new run, all seems OK.
22:10 Rick K discovers that the H-bank was being read out,
he fixes it so that at next KFREND it will not
be read out.
Rick connects quartz bar PMT to channel
33 of the BA. Need to click "reset quartz" button
each time you do KFREND or start a new run.
Items to Follow up on Next Shift
Keep an eye on DCOR LV power supply for DC2, it is reading low (4.8V).
Label 30 QKE tapes for short reg run and other special runs
Don't forget to hit "reset quartz" button after each KFREND.
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