OWL 08/24/99 shift summary

Alexander Ledovskoy (ledovsko@fnpxsr)
Tue, 24 Aug 1999 07:06:28 -0500

Shift Summary for OWL shift, 24-AUG-99

On Shift: Jason Hamm, Sasha Ledovskoy

Hours of beam available at all intensities: 7.00h
Hours of beam available at nominal intensity: 5.60h
Hours of E832 data (special runs not included): 6.33h
(4.93h at nominal
intensity)
Hours of special runs (laser scans, muon runs...): 0.08h

Accounting of lost time: Tape change, magnet polarity change, muon run

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Runs ended this shift:

14308 13.7M events BEAM_832
14309 Muon run

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Tapes brought to FCC this shift:

QKS315-320
QKC315-320
QKK315-320
QKB110-111

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Accesses during shift: none
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Overview of shift:

Smooth E832 data taking until 3:20. After 3:20, beam stop keeps dropping
in almost all the time. We did not count spills when B.S. was in as beam
available at nominal intensity. We also labeled a bunch of tapes

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Description of Shift:

run spill time comment
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14308 0:00 Smooth E832 data taking is in progress

0:50 Tapes are full.

14309 1:15 Start muon run
1:20 Stop muon run

14310 1:30 Start BEAM_832 run with negative NM4AN

82 beam stop drops, MCR investigating. beam goes away
until spill 89

90 beam stop is out

98 beam stop drops. call MCR
99 beam stop out in the middle of this spill

3:55 DC currents: DC1=200uA, DC2=254uA
Hogan paged. Long discussion with Hogan. We blame
humidity (60%). BOA=1.1

112 beam stop falls in. MCR checked interlocks -
it is not interlocks. Investigating
120 Beam stop is out.

121-129 beam stop is in.

133 ktevana errors. kfrend fixes it.

142 ktevana errors - kfrend

144-146 beam stop is in

156-162 beam stop is in

166-168 beam stop is in

172-173 beam stop is in

6:04 ONLINE SPLIT QKSM14 is mounted on ktev4 tps3d2

207-219 beam stop is in

223-227 beam stop is in

242-243 beam stop is in


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