Jefferson Lab Weekly Briefs October 6, 2010
Jefferson Lab Weekly Briefs
October 6, 2010
12 GeV Upgrade
At the request of the Office of Nuclear Physics, Daniel Lehman, Director of the Office of Project Assessment in DOE's Office of Science, convened a team of 22 experts plus nine DOE observers in an Independent Project Review of the 12 GeV Upgrade at JLab Sept. 28-30. The purpose of the review was to assess progress in all aspects of the project since April 2010. The review committee concluded that the project is making satisfactory progress and provided 21 recommendations to guide activities in the coming months.
Cooling of the Hall A superconducting magnets started Thursday after the End Station Refrigerator came back online. Cooling of the superconducting Moller polarimeter magnet proceeded quickly, and Hall A staffers began checkout of the system with beam on Thursday evening. Cooling of all left-High Resolution Spectrometer magnets took until Monday. Some of the HRS superconducting magnet power supplies were repaired during the maintenance period, and final checkout of these supplies required having the magnets superconducting again. The commissioning process began Monday and is expected to last a few days. Pump and purge of the cryogenic target system was performed Monday evening. Limited (no HRS) experiment commissioning has taken place during the evenings with low beam currents and un-cooled solid targets.
AIP State Department Fellowship Application Deadline is Nov. 1
The first week of beam operations went well after the summer down with beam to Halls A and B. Hall C is not ready for beam. Some accelerator issues were indentified and addressed. The injector gun#2 is operating at 130 kilovolts. The gun high voltage appears to be a bit unstable at times when the gun is power cycled. The machine optics and energy needs some fine tuning and adjustment.
FEL staffers continued the careful characterization of the ultraviolet FEL, while also quantifying the details of the injector systems under brightness-optimized conditions.
United Way Picnic Set for Thursday
Win an iPad in United Way Raffle
Dust off those clubs! It's time for the JLab 2010 Fall Golf Tournament
Applications for New Dosimetry Now Online!
JLab Calendar of Events
Oct. 7: United Way Donation Drive Begins
JLab's Safety Numbers
37 Days since Last Recordable Accident (JLab record: 331)