Shift report for evening 8/17/99

Sasha Glazov (
Wed, 18 Aug 1999 00:03:53 -0500

Shift Summary for eve shift, 17/aug/99

On Shift: UE, SG.

Hours of beam available at all intensities: ~5h 50min
Hours of beam available at nominal intensity: ~5h 50min
Hours of E832 data (special runs not included): ~5h 40min
Hours of special runs (laser scans, muon runs...): 40min (laser scan)

Accounting of lost time: Tape change

Runs ended this shift:
Run 14253 -- Laser scan
Run 14256 -- 13.8M beam_e832

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

Accesses during shift:

End of plan shutdown: work on CSi channels 216,226.

Overview of shift:
End of shutdown, Laser scan, E832 datataking

Description of Shift:

Fixing of CsI problems during shutdown time followed by laser scan.
Then E832 data taking with variable intensity (4 & 7 E12) and many

run spill time comment
14238 15:30 Shift starts -- no beam, down time continues
17:00 Problems with channels 216-226 are fixed.
The problem was due to loose cable conection.
17:08 Start laser scan
17:52 "Excellent!"
18:00 Put analysis magnet back on, initialize E832 run
18:07 Beam is back. But there are problems in crate 53,
right after initialization: UCLA scaler has yellow
light. Do manual init before the run start
14256 18:12 Kfrend, start data taking.
9-10 18:21 Beam is off target. Called MCR, they
say they are tuning. Also intensity is low (4E12).
22 Intensity goes to 7E12 but the rate of aborts
gets higher as well.
~160 21:55 MCR informs us that intensity will be low for a
while. (we notice decrease in the rate of aborts
as well)
22:22 MCR informs us that intensity will be high again
(we see also higher rate of aborts...)

Follow up Notes on Previous Shift

Items to Follow up on Next Shift

Monitor CsI channels 1137, 128.