Shift Summary for Eve shift, 09/30/99

Sydney A. Taegar (taegar@physics.arizona.edu)
Thu, 30 Sep 1999 22:56:57 -0700 (MST)

Shift Summary for Eve shift, 09/30/99

On Shift: Ruth/Stephen Pordes, Sydney Taegar
Also present: Hogan, Valeri, PeterSh, JasonL, Arun

Hours of beam delivered at all intensities: 0
Hours of beam delivered at nominal intensity: 0
Hours of E832 data (special runs not included): 0
Hours of special runs (laser scans, muon runs...): 0.75

Accounting of lost time:

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Runs ended this shift:
Run 14785 - LASER_SCAN

Tapes brought to FCC this shift:

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Accesses during shift:

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Overview of shift:

Absolutely no beam at all, whatsoever.

The "notch" in the DC3X cosmic illumination is traced to a bug
in the COSMICS trigger file. For COSMICS, B16 is defined as
RAN_RF8 (random pulser at RF/8) but RAN_RF8 had been accidentally
mapped to the DC3OR_LEFT_HOLE trigger source, giving B16 a large
overlap with B08 (DC_ILLUM) for the "notch" region of DC3X.
When the DC3OR_LEFT_HOLE trigger source fires too early, the B08
trigger is vetoed by L2-ACCEPT of B16.

At 22:20, MCR informed us that LINAC vacuum leak
repair and pump down will take ~6-8 hours.

The Pordes family, in concert with Arun and JasonL, labelled 120 tapes.

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Description of Shift:

run spill time comment
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14786 74 Extensive and inappropriate discussion among
shift crew members re use of "accidental" in
shift summary; would "incorrectly" not have been
more appropriate?

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Follow up Notes on Previous Shift

120 tapes labelled.
DC3X "notch" mystery solved.
Long laser scan taken.



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Items to Follow up on Next Shift