Log entry time 15:58:23 on November 28, 2010

Entry number 341817

Crew:
J. Roche (SL/TO)
B. Waidyawansa (3rd)

Highlights:
Beam conditions getting worse starting around 10am: lost of trips and Compton rates wondering a bit.
Production on Kin I-low still going on

Timeline:

• 10:15: Noticed that the Compton rates are degrading, MCC reports that the energy of the machine is pretty unstable and that they are running the program Krest to try to solve it. The hope is that once the machine is stable again, the rates will quiet down.
• 12:40: Lowered by the Compton HV to 1675V before the Compton run 24311
• 12:30: MCC takes the beam away to adress the beam tripping problems.
• 13:00: beam is back
• Compton HV back at 1750V in the middle of run 24312.
• 15:00 and after: MCC is still chasing after the source of energy instabilities, tries to setup the feedback on Hall A , reverts this after a few minutes.
• leaving shift with run 9059 on going.

 Run    Events  BCM U3   D3 (C)    Time         Avg Curr      Deadtime
9052   342 k   0.01147  0.01261   67.5 mins    2.9728 uA     6.35%
9053   306 k   0.01028  0.01136   60.7 mins    2.9739 uA     6.17%
9054   292 k   0.00957  0.01055   62.8 mins    2.6679 uA     6.37%
9055   end of run failed so no end of run halog entry
9056   221 k   0.00700  0.00772   51.7 mins    2.3714 uA     6.23%
9057   271 k   0.00860  0.00947   63.0 mins    2.3899 uA     6.02%
9058   218 k   0.00590  0.00648   68.9 mins    1.4971 uA     5.94%

24305, 24306, 24307,24308,24309, 24310, 24316