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User name Ibrahim
Log entry time 08:04:04 on November 1,2008
Entry number 245872
keyword=Owl Shift Summary
Owl Shift Summary
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12:00AM Shift started while the hall is still in controlled access for the target optics work.
02:50am Finished the target optics work in the hall.
02:55am Moved the target to the Optics (BeO) position and asked MCC for a 2 uA Beam (Raster Off).
03:10am Threshold for BB is set to -80mV for T1 and T6.
03:25am Moving the target to the Optics Hole Position.
03:28am Asked MCC for a 5 uA rastered beam (4x4 MCC units).
03:50am Moved the target to the Optics position
04:16am Changed the beam to Raster off.
04:40am Cannot fill the reference cell with H2. Paged the run coordinator and he recomended to page JP. JP will come to check it.
05:10am Paged the run coordinator again because ROCS 8,9,10 cannot be rebooted remotely.
05:15am Called MCC to ask for an escorted controlled access. JP is here and will check the H2 gas problem. Also we will try to reboot ROCS 8,9,10.
5:52am JP found that the H2 valve was closed. Now we can fill the reference cell.
05:55am Moved the target to the reference cell with H2 at 100 psig.
06:10am Beam is back at 5 uA, 4x4 MCC raster. Taking 30 minute runs to the end of the shift
07:15am BB DC HV is tripping every few minutes due to the beam current fluctuations.
07:20am Took the beam briefly to check the BB DC HV problem and then lowered the current to 3 uA
07:28am Lowered the beam current again to 1 uA to try to avoid the BB DC HV tripping.
08:00am Shift ends.