User name S. Bailey
Log entry time 23:51:33 on July26,2005
Entry number 149600
keyword=Swing Shift Summary
Swing shift summary:
S. Bailey, K. Grimm, J. Katich
16:00 Still in controlled access.
16:00 Pedestal Run 3845 (no beam)
17:00 Moved from 4He target to empty target
17:08 Pedestal Run 3846, 5uA at the very end
17:20 Power Permit
17:30 5 uA, 14x14 raster, spott++
17:35 Moved from empty target to 4He
17:45 Increased current to 40 uA, in increments of 10 uA
17:50 Called MCC to decrease y-positions of both BPMA and BPMB
17:54 Production Run 3837
18:05 Start Compton Run
18:40 Septum quenched at 7.7 K (Run 3837), beam off
19:04 Pedestal Run 3848
While we wait for the septum temperature to drop below 7.8K, MCC will install
new optics. The following runs are taken with the new optics.
19:25 Moved from 4He target to empty target
19:30 Dithering Test, Run 3849, 5 uA
19:40 Dithering Test, Run 3850, 30 uA
Results show no improvement.
19:45 Called MCC and asked them to back out of the change. No beam.
Continue to cool septum temperature.
19:55 Moved from empty target to 4He target
20:00 Septum temperature @ 7.8 K. Reset right septum interlock, set
right current septum
20:04 Pedestal Run 3851 (no beam)
20:45 The right septum temperature is 6.658 K and the right septum
current is 278.22 A. We are ready to take production runs.
20:45 MCC lost the electron gun due to a radiation alarm. They are
troubleshooting the problem.
20:54 Pedestal Run 3852 (no beam)
21:05 Beam is back, 5 uA, spot++
21:15 Increased to 38 uA, in increments of 10 uA
Interrupted. Beam down to tune Hall C.
21:20 Beam returns. Increased to 38 uA, in increments of 10 uA.
21:22 Production Run 3853
21:22 Start Compton Run 11561
21:35 The right septum temperature was fastly approaching 7.6K so I
dropped beam current from 38 uA to 35 uA.
22:00 Dropped beam current from 35 uA to 34 uA.
22:05 Stopped Compton Run 11561 due to Roc5 problems. Started Compton Run
22:13 Production Run 3854
22:20 Tried to adjust raster size to yield 4 x 4 (suggested by Rob F.)
I did numerous iterations in both x and y and there was no
clear correlation between set points and spot++ points. Back to 14 x 14
22:26 Production Run 3855
22:38 Beam down, box supply needs to be fixed.
22:40 No response from Happex DAQ. Rebooted DAQ twice. Adaql1
rebooted itself. According to Bryan, right spectrometer needs to
reboot. He said to request a controlled access. Rob is coming in
and will do this.
22:45 Rob enters Hall in Controlled Access