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User name V. Sulkosky
Log entry time 08:19:21 on September 12, 2009
Entry number 289208
keyword=Owl Shift Summary
September 12, 2009
SL: V. Sulkosky
TO: X. Yan
3rd: J. Roche
Owl Shift Summary:
+++++++++++++++++++++++++++++++++++++++++
00:00 Begin shift with beam tuning. Compton photon rates at 500 Hz/uA
after Moller.
Right Q2 magnet is down due to power supply problems.
01:05 Compton photon rate now between 100-200 Hz/uA.
01:14 Beam profile looks good from Harp scans:
A: 278 x
62 microns
B: 310 x
156 microns
01:16 Move to holey carbon target to check raster. Ask for raster on (11
x 8.5 MCC units).
01:19 Target at holey carbon, asked for 5 uA to check raster size.
01:30 Noticed BPMB positions were off. Asked MCC to set them to the
nominal positions (-0.8,2.1).
01:40 Beam positions look good now.
01:43 Move target to loop 3 LH2 target.
01:47 Target at LH2.
01:54 S0 HV's turned off after raster check.
02:10 Compton HV for GSO tripped, reset.
02:15 Compton HV for GSO tripped again, reset.
03:23 Changed fast FB BPM gain control from auto to manual.
03:39 Change current to 80 uA during boiling study.
03:55 Change current to 60 uA during boiling study.
04:13 Change current to 40 uA during boiling study.
04:28 Completed boiling test.
04:32 Ask for 100 uA to finally begin production again.
04:33 Changed fast FB BPM gain control back to automatic.
04:35 Begin producton on LH2.
05:02 Changed fast FB BPM gain control from auto to manual.
Parity Run Summary:
Start Run Events Comments
=======================================================================================================
02:00 12234 Test run for BCM/density study
02:13 12235 Unser switched from adc22_1 to adc23_2
02:17 12236 1.7k Junk, Unser switched back to adc22_1
02:18 12237 Test run
02:20 12238 50k BCM/density study ramp current 70-100
uA, then 90,80,70,50 and 30 uA
03:02 12239 20k Boiling study 40 uA, BPM FB in
automatic gain
03:23 12240 114k Boiling study 40, 60, 80, 100 uA, BPM
FB in manual gain
04:35 12241 49k LH2 (loop 3) 100 uA BPM FB in auto gain
05:04 12242 100k Production LH2 (loop 3) 100 uA BPM FB
in manual gain
06:08 12243 100k Production LH2 (loop 3) 100 uA BPM FB
in manual gain
07:07 12244 100k Production LH2 (loop 3) 100 uA BPM FB
in manual gain