Owl shift summary(12/19/08)
Youcai Wang (SL) Yi Zhang (TO) Ya Li (3rd)
Left p0=+2.35 GeV/c 16 degrees Beam 5892MeV 12 micro amps
continuing to taking data from swing shift
00:35 MCC gave call tells that HallC is scheduled tonight, so MCC will take beam off about 30 minutes to make pass change.
01:02 MCC turn off the beam 01:03 stop run 4593 01:17 Flip sequence pause after Spin Flip stopped. 01:49 moved Target to empty Target 02:09 Target motion does not work well, Yi Zhang asked MCC no beam for target test. Target IOC(26) doe not work. 02:53 page Yi Qiang come, call controlled access to hard reboot Target IOC. 03:02 go into Hall A 03:15 page run coordinator, because Yi told that when he hard reboot Target IOC there are some failure message in VME, later Yi told that Target IOC is coming back.
03:35 Target motion become normal. 03:40 ask MCC for 2uA beam and correct beam value, ask mcc to tune up (Target is moved at empty target position). 03:50 ask MCC to get permission to move target to 3He, then do polarization(68.2%). Move target to Empty target position again, ask MCC to for 2uA and let MCC tune up. 04:02 Move target to BeO,
04:05 BB HV trip. reboot all ROCs. 04:25 BeO spot ++ 04:27 Move target to 3He, check 3X4 raster on, 5X6.6 raster on rates is similiar. Ask Mcc to 3X4 raster on and beam up to 12 uA then go to Production. RUN 4594 start run fails, RUN 4595 BeO test RUN 4596 3He 3X4 2 uA RUN 4597 3He 5X6.6 2uA 04:41 RUN 4598 production (12 uA) without Happex (Target is ready by Yi Qiang)
RUN 4599 Production with Happex 30595. ROC 8 has not reported so reboot ROC8 ,ending failure no ending inforamtion, startcoda again.
RUN 4600 good run RUN 4601 ROC 8 and EB1 has not reported, reboot ROCs.
Run 4602 continues to day shift
Start time End time RUN number events Coulomb
Run 4592 1M BCM u3[0]: 0.04077 Run 4593 716K BCM u3[0]: 0.0291 Run 4594 startcoda failed Run 4595 Check BeO Run 4596 Check rates 3He 3X4 Run 4597 Check rates 3He 5X6.6 Run 4598 227K BCM u3[0]: 0.009322 Run 4599 632K(?) BCM u3[0]: 0.028 (estimated) RUN 4600 1M BCM u3[0] :0.04502 RUN 4601 BCM u3[0]: 0 Total : 0.1477 Coulomb