Log entry time 08:06:48 on November 29, 2010

Entry number 341913

Crew:
J. Roche (SL/TO)
F. Itard (3rd)

Highlights:
Quiet production on Kin I-low
Strange drift gain on Cerenkov 2 starting at run 9065 and going away during run 9074.
Changed bcm calibration constant used for end of run halog during run 9068

Timeline:

• 1:53: Efficiency run 9069 (ps3=1,ps4=1, all other at 0), config=LHRS.
• 2:28: Optics run 9070, with config=LHRS and (ps3=1,ps4=1, all other at 0). This run (9070) was stopped after 15min as MCC request to take beam away for some minor tuning. Repeated this setting with run 9071.
• 3:00: MCC reports trouble with the RF separator, the beam is taken away for a few minutes
• 3:13: Back to LH2 target, run 9072 is junk. Hall C goes off line for the night.
• 7:00 trip of HV channel 1 and 7 slot 11. Restored without any difficulties.

 Run    Events  BCM U3   D3 (C)    Time         Avg Curr      Deadtime
 9066   298 k   0.01001  0.01102   59.1 mins    2.9674 uA     7.21%
 9067   337 k   0.01137  0.01253   65.1 mins    3.0578 uA     6.45%
 9068   275 k   0.00881  0.00976   61.7 mins    2.5067 uA     6.69%
 9073   346 k   0.01206  0.01207   62.9 mins    3.1943 uA     6.43%
 9062   299 k   0.00937  0.01037   59.5 mins    2.7621 uA    10.09%
 9074   318 k   0.01095  0.01089   61.3 mins    2.9681 uA     6.41%
 9075   305 k   0.01031  0.01029   61.3 mins    2.7995 uA     6.41%
 9076   347 k   0.01181  0.01179   68.3 mins    2.8780 uA     6.65%

Special Run list (LHRS coda config):

 Run    Events  BCM U3   D3 (C)    Time         Avg Curr      Deadtime
 9069   149 k   0.00503  0.00554   29.6 mins    2.9791 uA    10.60% === efficiency run
 9070    22 k   0.00171  0.00188   12.9 mins    2.3140 uA     6.37% === optics run
 9071    29 k   0.00152  0.00167   18.8 mins    1.4134 uA     5.95% === optics run

Compton Run list:

24332, 24333, 24334, 24335, 24336, 24337, 24338, 24339, 24340, 24342