Log entry time 21:06:17 on October 07, 2010

Entry number 333901

All magnet power supplies are now operational, but the left arm NMR multiplexer is not working, so we are not able to lock the dipole. We will replace the multiplexer with a spare from Hall C tomorrow, but we are also working on allowing the Hall probe to regulate the dipole as a backup. In an effort to not heat up the target, which is no longer in liquid phase due to the Qweak target cooldown, we will not take beam tonight.

Because of a bad valve in the south linac today, Hall B lost beamtime which pushes their calorimeter calibration back several hours. This moves putting all three halls online to Monday. The Compton tune will occur sometime in the week after that.

Plans for the next 24 hours:

• Hall in restricted overnight
• Techs will bleed up the left spectrometer and replace NMR multiplexer

Plans for the next week:

• HRS commissioning/5 pass optics (Friday swing and over the weekend)
• 8 hours Moller commissioning (Sunday, needs to be confirmed with Sasha)
• BCM calibration, moved to beam studies Tuesday
• Compton tuning after Monday injector work (Tuesday swing/Wednesday?)
• Arc energy scanner run (needs to be done in the day on a weekday)
• Arc energy measurement