Log entry time 12:23:50 on February 28, 2009

Entry number 263864

This entry is a followup to: 263668

Summary for Feb 27 owl - Feb 27 swing

Data taking at fifth pass with more beam trips.

Beam in Use

shift	ABU	BANU	BNA
2009/02/27 owl	7.32	0.07	0.62
2009/02/27 day	6.16	0.07	1.77
2009/02/27 swing	5.18	0.49	2.32
total	18.7	0.6	4.7

Main events/issues:

• February 27^th
  • Production on kinematic K: P_lhrs = 1.51 GeV/c, 45^o.
  • Beam availability deteriorated throughout the day due to frequent trips
    and RF problems.
  • 17:45-19:50 BigBite T6 trigger threshold scan.
  • Average target polarization for February 27^th: 62.8%.

  
  

  Plans for the next couple of days:

  • February 27^th to March 2^nd: Production on kinematics K, I, G, E and C.
  • 10:30 Insert beam half-wave plate.
  • March 2^nd:
    • 6:30 Controlled Access for left HRS polarity change to +ve.
    • 9:00-17:00 left HRS positron data.
    • 17:00 Controlled access for left HRS polarity change to -ve.
    • 19:00 Moller measurement.
    • 23:00 Resume polarized production at 5^th pass.
  
  
  
  A copy of this log entry has been emailed to: brads,jpchen,jiang,meziani,choi