Jefferson Lab Weekly Briefs
November 20, 2013
AcceleratorExtra Hands Needed For Tunnel Housekeeping
Accelerator Operations is preparing for the end of the Long Shutdown and is getting ready for CEBAF accelerator commissioning activities. One of the last things to do before commissioning is general housekeeping in the tunnel. Extra (volunteer) help is still needed for the rest of this week. Tunnel housekeeping is planned for Thursday and Friday, 8:30-11:45 a.m.
Anyone that can spare this block of time for one morning or more is asked to contact Harry Fanning, x7619. If you aren't Radiation Worker and Oxygen Deficiency Hazard trained, you can still sign up and be escorted. Everyone participating in this effort must wear flat- or low-heeled, closed-toe shoes, long pants and a short- or long-sleeved shirt (wear comfortable clothing as it can get warm in the tunnel). Volunteers with Radiation Worker and ODH training must wear their personal dosimeters. For staff members that don't normally get into the tunnel, this is a great way to meet Jefferson Lab colleagues from outside your work area and to learn more about CEBAF. Pizza lunches will be available for volunteers at the end of the cleanup activities each day.
PhysicsJefferson Lab Published Articles, Nov. 4-8
Remember to submit your papers for approval to the Jefferson Lab Publications database. The next Publications Refresher Course will take place Monday, Dec. 9 at 9 a.m. in CEBAF Center room F226. To attend, R.S.V.P. to Kim Kindrew.
Center for Theoretical and Computational PhysicsThe possibility of measuring the parity-violating asymmetry in Møller scattering at Jefferson Lab with sufficient accuracy to determine the weak mixing angle to 0.1 percent offers a complementary path to the discovery of new physics to that followed at high energy colliders. A new calculation has just been performed of the γZ box contribution to parity-violating electron-proton scattering, which constitutes an important uncertainty in computing the background to this process. It shows that while the γZ correction grows rapidly with energy, it can be relatively well constrained by data from parity-violating inelastic scattering and parton distribution functions.
EngineeringMechanical engineering reports that the 12 GeV CEBAF Songsheets have been reviewed and updated to match what has been installed in the tunnel, as well as matching what is in the CEBAF Element Database. The songsheets are now in the approval process and will be released into the Document Repository. Engineering staff will communicate the updated method for retrieving the PDF versions of the songsheets once all the links are established.
JLab Calendar of Events
Nov. 20-23: CLAS Collaboration Meeting
Environment, Safety, Health and QualitySafety Showers and Eyewash Stations
Many Jefferson Lab workers have seen the safety showers and/or eyewash stations in various locations at the lab. Fortunately, there are only a few people working in areas or with materials that may require the use of an eyewash or shower. The major criterion used to determine if an eyewash or shower is required is the presence or use of hazardous chemicals. A chemical manufacturer will list on the Safety Data Sheet (formerly Material Safety Data Sheet) whether an eyewash and/or shower is required.
ESH&Q is often asked where and how far apart the eyewashes stations/showers should be located. There are various ANSI standards and federal regulations that detail the location (i.e. no more than 10 seconds or no more than 100 feet with an unobstructed walkway) from the hazard. Also, the prescribed volume of water and flow patterns must be checked, as well as the water temperature and cleanliness. Weekly checks are required, so thanks to the Safety Wardens who conduct these tests!
Eyewash stations and safety showers are designed to be easy to use - either push a flat panel for an eyewash or pull on a handle for a shower. Some locations are electronically monitored so that when activated, it notifies the guards and other responders. If you are ever splashed with a chemical, never hesitate to use an eyewash or shower; the difference may be saving your sight or your life.
AnnouncementsJAG Dog Club Collects Food Donations through Friday, Nov. 22
Members of the JAG Dog Club, in coordination with Dan Young, Physics Division, are collecting nonperishable food items for the Peninsula Foodbank through 5 p.m. Friday, Nov. 22. Donation collection boxes are located in the CEBAF Center lobby, the Support Service Center, the TEDF lobby, and Building 89. Bring only items packaged in cans, plastic or cardboard; items packaged in glass cannot be accepted. For more information, see the full announcement on We Hear That.
Thanksgiving Warm-Up Buffet in the Quark Cafe
The annual Quark Cafe Thanksgiving Feast is set for Thursday, Nov. 21, 11:30 a.m.-1:30 p.m. This year's buffet will feature roast turkey with cornbread sage dressing, gravy, fresh orange-cranberry sauce, wild mushroom ravioli in a lobster Boursin® cream sauce, carved prime rib of beef, Yukon gold garlic mashed potatoes, sweet potato casserole, green beans almandine, maple-walnut Brussels sprouts, dinner rolls and assorted pies. The buffet is $10.13 (plus tax) and includes a medium fountain drink. Buffet items will be available for a la carte purchase.
Order Thanksgiving Desserts from Quark Cafe by Nov. 22
The cafe is accepting holiday dessert orders through Friday, Nov. 22 (date corrected), during breakfast, lunch and Wednesday snack hours. The cafe is offering a selection of whole pies, including pumpkin, southern pecan and fruits of the forest. Pumpkin cheesecake is also available. Pre-ordered desserts will be available for pickup on Tuesday and Wednesday, Nov. 26-27. Pick up your order form and get more information in the Quark Cafe.
Colloquium and Public Lecture Scheduled for Nov. 26
Lisa J. Kaufman, Indiana University's Center for Exploration of Energy & Matter, will discuss recent results from an experiment to measure neutrinos. While neutrinos are all around us, many of their properties remain a mystery. The study of a theorized process called neutrinoless double beta decay can shed light on the properties of neutrino mass, whether the neutrino is its own anti-particle and a potential discovery of physics beyond the Standard Model. The Enriched Xenon Observatory (EXO) program is aimed at searching for neutrinoless double beta decay in Xenon-136. In this talk, titled "Back to the Salt Mines: The Search for Neutrinoless Double Beta Decay in Xe-136," Kaufman will discuss the current status of double beta decay, with special emphasis on recent results from EXO-200, which has made the most precise measurement of the two-neutrino double beta decay of any isotope and has placed one of the most stringent limits on the absolute neutrino mass to date. The colloquium will take place in the CEBAF Center auditorium on Nov. 26 at 3 p.m. Cookies and coffee will be served in the lobby beginning at 2:30 p.m.
JAG Holiday Party for Jefferson Lab Children and the Young at Heart
The JAG Holiday Party is scheduled for Saturday, Dec. 14, 10 a.m.-1 p.m. in the CEBAF Center lobby. All employees, contractors, users and their children are invited. Families are encouraged to bring a new, unopened toy for the U.S. Marine Corps Reserve's Toys for Tots program. Get your picture taken with Santa Claus, who plans to drop by with the snow dogs, Nikko and Tally. (Owners Dan and Kim Young are members of the JAG Dog Training Club, and Nikko and Tally are trained service dogs). Come and enjoy holiday-themed games, crafts and light snacks, including ice cream prepared with liquid nitrogen. To end the day, staff from Jefferson Lab's Science Education department will perform their Cryo Show. All children must be accompanied by an adult.
Volunteers Needed to Help With the Holiday Party
Volunteers are needed to help with the JAG holiday party. Sign up online today. Positions include:
Jefferson Lab will again participate in the U.S. Marine Corps Reserve's annual Toys for Tots toy drive. Collection boxes will soon be placed near the main entrances of CEBAF Center, MCC, SSC, ARC and TED Buildings.
Ready, Set, Hang Those Decorations
The Jefferson Activities Group is sponsoring a Holiday Office Door/Cubicle Decorating Contest. Prizes will be awarded to Best Decorated, Most Original and Silliest. All employees, users and contractors with an office or cubicle may enter the contest (individuals or groups). Include your name(s), building number and office/cube location. Judging will take place Dec. 17. Winning entries will be announced Wednesday, Dec. 18. Decorations may go up as early as Dec. 2 and should be taken down by Jan. 3. Decorating materials must be fire resistant and only UL-approved lighting/electronics may be used. No unwrapped food items are allowed. To enter, email JAG Chair Mary Jo Bailey by COB Dec. 13.
Tracking Thomas at Jefferson Lab
|JLab Weekly Briefs is an ongoing publication providing information on the status of safety, accelerator operations, experiments, free-electron laser, reviews, upcoming activities and special events. Deadline for submission is every Tuesday by 10 a.m. Submit new items to: Public Affairs or contact Kandice Carter at x7263.|