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User name A. Puckett
Log entry time 23:51:27 on April 3,2006
Entry number 169451
Followups:
keyword=swing shift summary
Swing Shift Summary, 04/03/06
Shift Leader: Andrew Puckett
Target Operator: Kalyan Allada
Took over from day shift at 16:00 in the middle of production run 3626. Target position is Pol. 3He. Beam current is 8 muA.
Beam is pretty bad for most of the shift, there are 2 good production runs near the beginning of the shift and from about 21:30 to 22:30 (9:30-10:30 pm), but other than that, there is not much here. Almost immediately after the end of the second good run (22:30) the beam shuts off and doesn't come back on. After a few minutes, MCC calls to inform that there is a problem with the Hall A laser at the polarized source, the phase lock is broken/turned off. Injector expert is here, made an access and is working on the problem as I get ready to pass off to owl shift.
GEN DAQ RUNS:
Run # Start Stop Nevents Replay? Comments
3626 15:43 16:42 2M Y
3627 16:42 17:02 625K Y Ended early for MCC to fix RF problem
3628 17:44 17:46 no beam, take cosmic data, adjust prescalers
3629 17:47 19:06 cosmic run, changed thresholds and prescalers
3630 19:18 19:20 N beam back at 1 muA, spot check and readjust thresholds and prescalers...
3631 19:23 19:44 284K Y beam at 8 muA, production
3632 19:45 20:45 Y bad beam on and off availability
3633 20:59 21:23 Y bad sporadic beam
3634 21:23 22:30 2M Y good beam but many trips
3635 22:32 22:54 junk, almost no beam this run
3636 23:02 cosmic run, beam off Hall A laser at the source problem
COMPTON RUNS:
Run # Start Stop Pe*Pg S/N Comment
13261 19:29 21:36 92.9 3.8 beam pretty bad during this run
13262 21:38 22:57 89.4 5.2 also during this run
PARITY RUNS:
Run # Start Stop N Aq Comment
7214 20:32 bad beam most of run
7215 21:27 23:42 240K 144 better beam, kept running for a while with no beam forgot to end run