Jefferson Lab Weekly Briefs
November 16, 2011

12 GeV Upgrade

The Six-Month Shutdown is wrapping up this week with machine restoration and preparation for the upcoming physics run. Installation work for 12 GeV during the shutdown was successful, and C-100 cryomodule testing continues in the accelerator. Closeout reports and lessons learned are being captured in preparation for the 12-month shutdown scheduled to start in May 2012. The schedule of 12 GeV installation activities for the long shutdown is under development and will be incorporated into the labwide integrated installation schedule. 

Physics

Hall A is preparing for a possible beamline commissioning run in December. There is some concern that the beam position monitors will not be completed in time for that; if not, the hall might not get beam until January. Meanwhile, the target group is refurbishing the Hall B polarized target magnet for use with the g2p experiment.

Accelerator

Problems with stability and hardware limitations forced a reevaluation of the beam breakup setup, so the accelerator energy was increased to 282 MeV/linac. This resulted in lower permissible maximum beam current to the beam switchyard dump, but allowed BBU data to be taken. Commissioning of the C100 zones SL24 and SL25 continued; both zones operated with beam for BBU testing. Detailed repairs also continued on accelerator systems in preparation for beam delivery to the halls next week. These repairs included valves in the South Linac, various viewers throughout the machine and the low-conductivity water supply lines to magnet dipole segments, which had been found to be electrically shorted. Five-pass beam was spun up and the optics optimization procedures are in progress in preparation for beam delivery next week.

 

JLab Calendar of Events

Nov. 16 Colloquium and Public Lecture
Nov. 17: Quark Cafe's Thanksgiving Feast
Nov. 21: Safety Shoe vendor onsite
Nov. 24-25: Thanksgiving holiday; JLab closed
Dec. 2: Hall D Open House for Staff and Users
Dec. 5: Safety Shoe vendor onsite
Dec. 10: JAG Children's Holiday Party
Dec. 23-Jan. 1: Winter holidays/Shutdown days - JLab closed

Environment, Safety, Health and Quality

Automated External Defibrillator (AED) Use at JLab
According to the American Heart Association, more than 250,000 sudden cardiac deaths occur each year. A person suffering cardiac arrest has minutes to live and responding with an AED within those minutes can mean the difference between life and death for the victim.
 
Jefferson Lab has 14 AEDs located around the site, and many people are trained to use them. If you have seen them and wondered if you should use it, you must first receive training. JLab offers the AED training class (SAF 105) twice a month; all you have to do is sign up on line in order to attend. You may be a lifesaver some day.

Announcements

JLab Colloquium and Public Lecture Set for Nov. 16
Marc Kamionkowski, Johns Hopkins University, will present "The Cosmic Microwave Background: Beyond the Power Spectrum" in a colloquium set for Wednesday, Nov. 16 at 4 p.m. in the CEBAF Center auditorium. Kamionkowski will discuss new signatures in the cosmic microwave background.

Quark Cafe Offers Holiday Desserts
The cafe is accepting holiday dessert orders through Nov. 18 during breakfast, lunch and Wednesday snack hours. The cafe is offering a selection of whole pies, including sweet potato, pumpkin, pecan, apple high and fruits of the forest. Pumpkin cheesecake is also available. Pre-ordered desserts will be available for pickup on Tuesday and Wednesday, Nov. 22-23. Pick up your order form and get more information in the Quark Cafe.

Maximum Vacation Reminder

The maximum vacation leave balance that can be carried forward at the end of calendar year is 240 hours. Any accrued vacation over this limit that has not been taken by Dec. 31, 2011, will be lost. Please remember to include the vacation accrual for the remainder of this calendar year (through Dec. 31) when figuring your remaining vacation balance for the year.

Thanksgiving Warm-Up Buffet in the Quark Cafe
The annual Quark Cafe Thanksgiving Feast is set for Thursday, Nov. 17. This year's buffet will feature roast turkey with cornbread sage dressing, gravy, fresh orange-cranberry sauce, Smithfield ham, roast prime rib of beef with au jus and horseradish cream, Yukon gold garlic mashed potatoes, sweet potato casserole, green beans almandine, maple-walnut brussel sprouts, dinner rolls and assorted pies. The buffet is $9.99 (plus tax).

Tracking Thomas at JLab
Little Thomas is visiting all corners of the JLab campus. If you can identify his location this week, email Kandice Carter with your guess. Guesses are accepted through Friday.

Congratulations this week go to Doug Higinbotham, Stephanie Vermeire and Michael Haddox-Schatz, who were the first to correctly identify the Nov. 9 location. Honorable mentions go to DeAnn Maddox, Karen Bartek, Greg Adams, Michelle Bailey, Dennis Merritt and Ron Bartek. Check out the Tracking Thomas webpage for a better view of his last location and this week's new mystery photo.