Shift summary for Evening shift, 8/25/99

Christine Pietrykowski (pietryko@hep.uchicago.edu)
Wed, 25 Aug 1999 23:54:51 -0500

Shift Summary for Evening Shift, 8/25/99

On Shift: CP, NS

Hours of beam available at all intensities:5.5
Hours of beam available at nominal intensity:5.5
Hours of E832 data (special runs not included):5.25
Hours of special runs (laser scans, muon runs...): 0

Accounting of lost time: MI dead, Tape changes
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Runs ended this shift:
14323
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Accesses during shift: none
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Tapes taken to vault:
QKC 327-329
QKK 327-329
QKS 327-329
QKB 114
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Overview of shift:
E832 Normal Hyperon Beam intensity-unstable at times.

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Description of Shift:

run spill time comment
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14323 15:45 Added tape QKN029 to KTeV4
338 16:04 Pipeline errors. Reset pipeline.
357 16:28 Ran kfrend.
416 17:50 KTeVANA errors, ran kfrend
424 18:00 Seed2 monitor, beam was off target. MCR was
called. MCR called back immediately with news
that NM2V (steering magnet) went out. The
controller card was out. It was being replaced.
428 Good spill.
432 18:08 End Run (Change Tapes)
14324 18:21 New Run started
18:21 Noticed a very scattered beam. Called MCR to see
about adjustments. MCR called back-QXR
compenstaion, adjustments are being made.
27 18:56 Lost beam, main injector problems, no estimate.
Experts called in.
141 21:30 Beam is back, but unstable.
147 Beam is gone again. MI Injection problems
return. Experts investigating.
153 21:45 Beam returns.
175 22:15 Beam lost, same MI problem.
179 Beam returns.
184 KTeVana errors-Kfrend was run.

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Follow up Notes on Previous Shift:
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Items to Follow up on Next Shift
Next new run do a dart-fresh-start.