eve shift - 9/20/99

Ron Ray (rray@fnppd)
Tue, 21 Sep 1999 00:14:58 -0500

Shift Summary for eve shift, Sept 20, 1999

On Shift:RT, RR

Hours of beam available at all intensities: 7:50
Hours of beam available at nominal intensity: 7:35
Hours of E799 data (special runs not included):7:00
Hours of special runs (laser scans, muon runs...): 0:50 (special runs
for hyperon trigger)

Accounting of lost time: A few kfrends, tape change

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Runs ended this shift:
Run 14650 - - Special hyperon trigger run
Run 14651 - - Special hyperon trigger run
Run 14652 - 3.0M events - BEAM_799

Tapes brought to FCC this shift:
(including tapes for online split)

none

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Accesses during shift:None

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Overview of shift:
E.g., calibrate CsI, E832 datataking

Rate studies for hyperon trigger. Nominal E799 running.
A number of problems have been identified with monitor histograms.
Some histograms have not yet been updated for 799 running. A few
indicate potential problems. Possible problems include DC inefficiencies,
RC source TDC timing, RC hitmap, cosmic ray counters, level 3 processing
time (1 CPU), and VVH high voltage settings. RC hitmap and 3pi0 center-
of-gravity suggest that the East beam may be off in the horizontal direction.
Details and plots in logbook. Email sent to various experts.

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Description of Shift:

run spill time comment
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14653 41-42 19:16 kfrend
14653 20:44 left bend problems. No beam for 40 minutes
14653 165-168 22:02 Beam position fluctuates for a few spills

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Follow up Notes on Previous Shift

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Items to Follow up on Next Shift

---------------------------------------------------------
Ron Ray - Fermilab - (630)840-8090 - rray@fnal.gov
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