Summary for week of 8/20 - 8/26

Sydney A. Taegar (taegar@physics.arizona.edu)
Fri, 27 Aug 1999 15:07:13 -0700 (MST)

Summary of E832 Week 11: Aug 20 - Aug 26 Runs: 14277-14325

Hours of beam used/delivered : 109.73 / 125.05 = 87.7%

Vac00 (week) : 470K @ 6.8E12 (a record KTeV week!)

Vac00 (99run) : 3.39 million

Comments: Most beam loss due to:
6 hour Tuesday shutdown for Run II / FT intensity studies.
21 hour Thursday TeV shutdown for repairs.

KTEV used 87.7% of the available beam
KTEV loss due mainly to replacing trigger mask AZLAT and
ET LV power supply. Smaller losses due to
MF6 controller swap and NM4AN trip.

hours of beam:
Shift used/delivered comment
---------------------------------------------------------------------
Fri Aug 20 OWL: 6.6/6.9 MF6 drops out a couple of times.
DAY: 2.8/4.8* Access to replace MF6 controller.
EVE: 6.25/8.0 DC2 hangs on plane 1 stream 3.

Sat Aug 21 OWL: 6.2/6.3
DAY: 7.4/8.4 Pipeline reboots.
EVE: 7.7/8.0

Sun Aug 22 OWL: 6.75/7.0 2V1 source -300ps timing shift.
DAY: 8.0/8.5
EVE: 8.1/8.3

Mon Aug 23 OWL: 6.75/7.0
DAY: 6.3/8.0 NM4AN trip.
EVE: 6.0/8.0 Bad trigger mask AZLAT.

Tue Aug 24 OWL: 4.93/5.60* Random beam stop closings.
DAY 1.05/1.75* Random beam stop closings cont. TeV studies.
EVE: 5.5/7.5 ET 5V/50A PS dies.

Wed Aug 25 OWL: 4.7/4.9 TeV quench, MI problems.
DAY: 6.7/7.3* LINAC, MI problems.
EVE: 5.2/5.5 MI problems.

Thu Aug 26 OWL: 2.8/3.3* TeV shutdown prologue.
DAY: ------- TeV shutdown Act I.
EVE: ------- TeV shutdown Act II.
---------------------------------------------------------------------
TOTAL 109.73/125.05
---------------------------------------------------------------------

* Beam delivered time modified to reflect low intensity.