NEXT
Make New Entry,
Make Followup Entry
User name V. Sulkosky
Log entry time 08:09:54 on September 13, 2009
Entry number 289327
keyword=Owl Shift Summary
September 13, 2009
SL: V. Sulkosky
TO: X. Yan
3rd: Y. Oh
Owl Shift Summary:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00:00 Begin shift with no beam due to problems with beam transport past
0L06.
01:43 Talked with MCC. New problem with RF separators.
02:35 Restart Happex DAQ, run 12267 had no events.
04:00 Talked with MCC. Work still ongoing. The suspected culprit is a
faulty valve in
North Linac. May
have beam in 2 hours.
04:55 MCC called. Problem has been isolated. Expect beam by 6 am.
06:15 MCC is going to send tune beam to Hall A.
06:26 MCC is ready to send CW beam. Asked for 5 uA to verify beam
positions.
06:36 Beam positions look good. Ask for raster off and harp scans.
06:42 Turned on L-HRS S0 HV's to check raster.
06:44 Beam profile is focusing towards the target: Asked MCC to achieve
between 150-300 um.
A: 727 x
237 microns
B: 351 x
123 microns
07:12 Beam profile still focusing in y at target:
A: 326 x
114 microns
B: 348 x
52 microns
However, the individual wires do not indicate this!
07:18 Move target to Carbon with hole.
07:20 Target in place ask for 5 uA for raster check.
07:40 Asked for MCC to do a bit more tuning to defocus the beam in the
y-direction.
07:50 Beam profile at Harp B is good now: 260 microns x 159 microns.
08:02 RF separator problems. Should be 10-15 minutes.
Parity Run Summary:
Start Run Events Comments
==========================================================================================================
00:27 12265 100k No beam, pedestal run
01:24 12266 100k No beam, pedestal run
02:22 12267 0 No beam, junk, run failed to take data
02:37 12268 100k No beam, pedestal run
03:34 12269 100k No beam, pedestal run
04:31 12270 100k No beam, pedestal run
05:28 12271 100k No beam, pedestal run
06:25 12272 6.2k short run