Shift Summary for DAY, Dec. 25, 1999

Angela Bellavance (
Sat, 25 Dec 1999 15:36:53 -0600 (CST)

Shift Summary for day shift, 25/Dec/99

On Shift: P. Shanahan, A. Bellavance

Hours of beam delivered at all intensities: 4.3
Hours of beam delivered at nominal intensity: 3.9
Hours of E799 data (special runs not included): 3.4
Hours of special runs (laser scans, muon runs...): 0.8

Accounting of lost time: TeV quenches and other TeV problems.
Our messing with the kumquats / ktrig window.

Runs ended this shift:
Run 15286 - 12.9M events - BEAM_799
Run 15287 - LASERSCAN
Run 15288 - 2.6M events - BEAM_799
Run 15289 - ongoing

Tapes brought to FCC this shift: UPA253-258

Accesses during shift: none
Overview of shift:
Smooth data taking through early morning. Beam disappears around 9 and
doesn't return until 13:00. We crash ourselves in the afternoon and miss
0.9 hours of beam.

Description of Shift:

run spill time comment
15286 07:00 Take over, run ongoing.
07:46 Repeated request for tape mount of UPLA12 in
ktev3-tps2d4. Arun e-mailed about possibly faulty
drive. We clean the drive again and try to
re-mount the tape again. It looks like it's being
written to...maybe a software fault?
212 08:41 Reload Etotal and HCC to try to fix a small
221 08:52 TeV abort and we enter a SY conservation period.
237 09:13 HCC ineff. alarm. Goes away next spill on its
own. No beam yet.
09:43 Message from web page: left bends trip.
09:50 TeV quench at B4.
09:56 Ch. 13:"Est. 15 minutes."
10:25 Another TeV quench at B4.
10:39 Ch. 13:"Est. 20 minutes."
11:18 Ch. 13:"Estimate 45 minutes."
11:28 Stop run to do a laser scan. Run refuses to
finish. Do fresh-start.
11:45 UPLA wants to be mounted again. Arun paged. He's
coming in for a look.
15287 12:01 Start Laser scan.
15288 1 13:00 Start run. Beam returns on spill 2. Nominal
intensity by spill 5.
11-13 13:13 TeV aborts.
19 MCR warns us they are tuning. Lots of scaler
44 MCR done tuning. # scaler alarms much less now.
14:06 Tape mount request for UPK034.
58 14:18 Looking at histograms discovers a problem with the
kumquats for chamber 3. Try reloading kumquats.
60 Reload didn't work. Try a reset of the crate.
That doesn't work, send for Tony.
14:45 Lab Director and Mrs. Witherell stop by KTeV with
a delivery of home-made chocolate chip cookies!
They are heartfully appreciated.
15:05 Run Control appears hopelessly hung. Do a
drt-fresh-start and load new tapes.
15289 1 15:11 Run started successfully. And the original
problem is still there! Tony says don't worry
about it.

Follow up Notes on Previous Shift

Don't worry about the "heater" temp. Just be sure the "CsI-Bot" and
CsI-Top" readings are about 15 and 19 degrees, respectively.

Items to Follow up on Next Shift

-kumquat for chamber 3 has a hot channel. Wait for expert to return from
-inefficient HCC bit 1767. Bad connection in ET that will be worked on
next long down time.
-latches are out of the readout so some of the monitoring histograms look

Angela Bellavance work: (630) 840-2801 home: (630) 548-3412 page: (630) 722-6861
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