Shift Summary for DAY shift 8/30/99

Sami Amasha (
Mon, 30 Aug 1999 15:30:16 -0500

Shift Summary for DAY shift, 30/Aug/99

On Shift: Sasha Ledovskoy, Sami Amasha

Hours of beam available at all intensities: 8.5
Hours of beam available at nominal intensity: 8.5
Hours of E832 data (special runs not included): 7.75
Hours of special runs (laser scans, muon runs...): 0

Accounting of lost time: Changing tapes and initializing a run;
Laser illumination problems;

Runs ended this shift:
Run 14376 - 15.8M events - BEAM_832
Run 14377 - 6.0M events - BEAM_832 (Bad spills 76-end of Run: CsI quad

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

Accesses during shift:

Overview of shift:
Steady beam, continuous data taking.

Description of Shift:

run spill time comment
14376 07:15 Inherit smooth E832 data taking.

07:45 Tapes full. Change tapes. Update ADGN constants.

14377 1 07:58 start run 14377: BEAM_832

08:22 notice while filling out run sheed that
vv'ewud has low efficiency

76 09:37 Pipeline errors-reset pipeline & do KFREND.

81 09:45 laser illumination problem: upper left quadrant
is not illuminated. Laser stability RMS and other
CsI plots have only 2325 entries. Paged Ed.
With the help of BobT, we decide to do a

09:57 End run 14377. Do drt_fresh_start.

14378 10:10 Start run 14378

11:39 During routine histogram check, we notice that
lslope vs. plane plot in dc#summary shows a frown:
1 point above red line, 4 others very close to line

11:56 SEM has been a little high recently. Call MCR.

141 13:18 ktevana errors. KFREND.

14:00 TRD 1-8 HV is ON

212 14:52 LIVE_TIME error. Stop triggers and check busy
status, restart triggers. Ktevana errors.
KFREND. Start triggers again during spill 214.

Follow up Notes on Previous Shift

Items to Follow up on Next Shift

o if we lose beam for >= 40 minutes, and the DA works, do a laser scan.

o keep your eyes on channel 450 (see log book p. 103). If it remains stable,
and we do a laser calibration, maybe we don't need to swap the divider
(ask Ed). If it is unstable, page Julie and Ed.