Log entry time 20:07:44 on March 04, 2009

Entry number 264597

Summary for Mar 3 swing - Mar 4 Day

Finished LHRS positron running last night. Charge accumulation is near what was expected.

Performed Moller measurment Tuesday evening.

Switched back to negative polarity near start of day shift, but have had only had about 1 hour of beam due to several magnet problems.

Beam in Use

Shift	ABU	BANU	BNA
2009/03/03 Swing	4.09	2.36	1.15
2009/03/04 Owl	5.09	1.72	1.19
2009/03/04 Day	0.95	1.13	5.93
TOTAL	10.13	5.21	8.27

Main events/issues:

• Mar 3
  • Continued running with positron data taking.
  • Moller for 3/3 was 80.3 +/- 2.0%, in agreement with Compton
• Mar 4
  • Finished positive polarity running and switched back to negative polarity.
  • Problems with an ARC magnet prevents data taking from about 09:00 to 16:00.

  
  

Plans for the next few days:

• Continue 5-pass transverse production until pass change.
• Pass change will occur either late tomorrow afternoon or (more likely) Friday depending on how work progresses in Hall C's magnet and chicane reconfiguration.
• Will start 4-pass running with longitudinal polarization. Moller will be done Friday night.
• 4-pass positron running will likely take place on Monday day when techs are available.