Log entry time 11:35:33 on June 15, 2009

Entry number 281558

This entry is a followup to: 281364

Summary for June 14 owl - June 15 owl

3^rd pass production.

Beam in Use

shift	ABU	BANU	BNA
2009/06/14 owl	3.83	1.96	2.21
2009/06/14 day	6.66	0.73	0.60
2009/06/14 swing	4.54	2.12	1.34
2009/06/15 owl	5.51	0.60	1.89
total	20.5	5.4	6.1

Main events/issues:

June 14, 2009

• BHWP: OUT, Target spin: Longitudinal
• 00:00-01:00 Beam off due to vacuum problem in NL06.
• 01:00-03:30 Beam tuning, position and profile check.
• 03:30 Resume production on polarized ³He.
• 04:25-04:50 Mulitple wire chamber trips and beam down.
• 06:15 Begin target spin rotation to Transverse.
• 06:15-08:09 Calibration runs with reference cell: ³He, empty, H₂ and N₂.
• 08:22 Begin transverse production on ³He.
• 08:38 BigBite and HAND HV trip due to beam excursion.
• 09:20 BigBite and HAND HV trip due to beam excursion.
• 16:30-17:50 Controlled Access:
  • Swap hydrogen bottle for deuterium.
  • Compton electronics work.
• 18:00-18:20 Beam restoration, position and raster check.
• 18:23-18:41 Deuterium reference cell run.
• 18:50 Resume transverse production.
• 20:00 Request MCC to insert BHWP.
• 20:04-21:00 Beam off due to HV Gun comparator FSD trips.
• Average longitudinal target polarization for June 14^th: 63.2%.
• Average transverse target polarization for June 14^th: 56.2%.

• BHWP: IN, Target spin: Transverse
• 00:00-07:01 Smooth production running on polarized ³He.
• 07:01 Beam off, end of ³He(e,e'd) and BigFamily of Experiments!
• Average transverse target polarization for June 15^th: 56.3%.
• Total charge for 3^rd pass:
  • 0.9C Longitudinal.
  • 0.9C Transverse.