Summary for week of 8/13 - 8/19

Sydney A. Taegar (taegar@physics.arizona.edu)
Fri, 27 Aug 1999 15:05:56 -0700 (MST)

I forgot to send this out last week.
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Summary of E832 Week 10: Aug 13 - Aug 19 Runs: 14213-14276

Hours of beam used/delivered : 91.5 / 101.2 = 90.4%

Vac00 (week) : 393K @ 6.8E12

Vac00 (99run) : 2.92 million

Comments: Most beam loss due to:
19 hour recovery from low beta magnet problems on Saturday
8 hours of scheduled machine studies on Tuesday
8 hours of NM2EU magnet power supply problems on Thursday
Some low intensity (4E12) running due to TeV injection problems.

KTEV used 90.4% of the available beam.
KTEV loss due mainly to DAQ related problems:
kumquat reset/busies, ktev1 crash, hung pipeline crate 3;
also NM2V magnet trip.

hours of beam:
Shift used/delivered comment
---------------------------------------------------------------------
Fri Aug 13 OWL: 2.6/3.3* Run abort - ktev3_drv2. TeV water heater probs.
DAY: 6.2/6.3* Smooth E832 datataking.
EVE: 3.5/3.6* Various TeV problems.

Sat Aug 14 OWL: 2.9/3.0 Low beta magnet quench.
DAY: ------- Recovering from low beta magnet problems.
EVE: 0.5/1.5 Kumquat initialization problems.

Sun Aug 15 OWL: 6.25/7.0 ktev1 crash.
DAY: 7.9/8.35* Multiple drt_fresh_starts after tape change.
EVE: 8.25/8.5 Smooth E832 datataking.

Mon Aug 16 OWL: 5.9/6.0 Smooth E832 datataking.
DAY: 6.4/7.4* ktev1 UPSII error due to full root partition.
EVE: 6.4/7.0 Few spills with beam off target.

Tue Aug 17 OWL: 6.6/6.8 Smooth E832 datataking.
DAY 1.4/1.5 Machine studies. CsI 1137 HV cable replaced.
EVE: 5.7/5.8 CsI 216,226 loose HV connection fixed.

Wed Aug 18 OWL: 3.9/4.0* Mostly low intensity due to multiple aborts.
DAY: 4.5/4.6* Targetting problems. Intensity varying 3-6E12.
EVE: 3.5/3.6 NM2EU power supply problems -> beam off target.

Thu Aug 19 OWL: ------- NM2EU magnet trip.
DAY: 4.5/6.4* NM2V magnet trip.
EVE: 4.6/6.5* Kumquat busies. Pipeline crate 3 hangs.
---------------------------------------------------------------------
TOTAL 91.5/101.2
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* Beam delivered time modified to reflect low intensity.