Log entry time 16:01:12 on June 14, 2009

Entry number 281364

This entry is a followup to: 281103

Followups:

• 281558 06/15/09 11:35 V. Sulkosky Experiment Summary for June 14 owl - June 15 owl

Summary for June 13 owl - June 13 swing

Recovery from R-HRS dipole quench and resume 3^rd pass production at start of Day shift.

Beam in Use

shift	ABU	BANU	BNA
2009/06/13 owl	4.70	2.84	0.47
2009/06/13 day	6.03	1.39	0.58
2009/06/13 swing	5.38	0.60	2.02
total	16.1	4.8	3.1

Main events/issues:

June 13, 2009

• BHWP: IN, Target spin: Longitudinal
• 00:00-01:25 Several HRS magnets down due to right dipole quench: Left Q1 and dipole, Right Q1, dipole and Q3.
• 01:25 Left HRS magnets recovered. Ask for beam.
• 01:48 Resume production on polarized ³He with left HRS only while waiting for right HRS to recover.
• 02:15 Right HRS dipole and Q3 faults will not clear. Tech-on-call on his way to help reset them.
• 02:50-03:30 Controlled access for Ed Folts to reset right dipole and Q3.
• 03:30-08:00 Right Dipole slowly ramping up to 3.0855 GeV/c.
• 07:30 Begin taking Right HRS runs, momentum settling within a few MeV.
• 14:08-15:00 Problems with left DAQ.
• 15:56 Beam half-wave plate moved OUT.
• 22:19-24:00 Beam off due to NL06 low liquid level due to tripped vacuum pump.
• Average target polarization for June 13^th: 62.6%.