Log entry time 19:33:38 on June 13, 2009

Entry number 281103

This entry is a followup to: 281092

Followups:

• 281364 06/14/09 16:01 V. Sulkosky Experiment Summary for June 13 owl - June 13 swing

Summary for June 10 owl - June 10 swing

Smooth 2^nd pass production.

Beam in Use

shift	ABU	BANU	BNA
2009/06/10 owl	5.54	0.86	1.59
2009/06/10 day	5.52	1.19	1.29
2009/06/10 swing	6.92	0.63	0.45
total	18.0	2.7	3.3

Main events/issues:

June 10, 2009

• BHWP: IN, Target spin: Transverse
• 00:00-00:35 Reference cell data.
• 00:38 Change right HRS P₀ = 1.865 GeV/c for Delta data.
• 00:40 Continue ³He(e,e'd) production for left HRS.
• 02:15 Right dipole set and begin Delta production.
• 04:45-6:07 Beam down due to North LINAC RF problem.
• 08:55 Beam half-wave plate retracted.
• 11:40-12:10 Rotate target direction from Transverse to Longitudinal.
• 13:25-14:02 No beam due to cooling water to beam dump trip.
• 16:45-18:45 Laser work during production running:
  • 16:15 Target polarization 60.1%.
  • 16:45 lasers off to check fiber connections.
  • Discoverd two laser fibers were damaged.
  • Replaced with better fibers.
  • 18:10 Lasers turned back on.
  • One fiber is still hot.
  • 18:44 Target polarization drops to 51.2% during work.
  • Runs taken during this work: 3450-3453 and 22321-22324.
• 17:55 Beam half-wave plate inserted.
• Average target polarization for June 10^th: 57.6%.