Jefferson Lab Weekly Briefs September 16, 2009

Jefferson Lab Weekly Briefs

September 16, 2009


Experiment E05-109, HAPPEx-III, a measurement of the nucleon strange form factors at high Q2, continues taking production data in a reasonably smooth fashion in Hall A.

APS April Meeting Abstract Submission Deadline is Oct. 23
The 2010 APS April Meeting will take place at the Marriott Wardman Park Hotel in Washington, DC. Because the April Meeting will be held in conjunction with the annual winter meeting of the American Association of Physics Teachers (AAPT), it has been moved to February. The deadline for receipt of abstracts is Friday, Oct. 23, at 5 p.m. EDT (2 p.m. PDT).


The accelerator delivered beam to the halls with some down times and issues. Magnets DOG2E and DOG3E tripped a few times and were fixed. RF (radiofrequency) separators tripped off several times and were scheduled to be acid flushed. During the Saturday swing shift, beam would not transport out of the injector, most likely due to a vacuum valve. After cycling some injector vacuum valves many times, Operations staffers were able to deliver beam again. Hall A Compton counts were unstable at times, and more troubleshooting is needed for this problem.

Free-Electron Laser

The FEL team was able to complete installation of the ultraviolet line and get most of it aligned last week. The UV line is fully under vacuum and the dipole strings have been powered up. The source of a water leak in one optical chicane magnet is an unauthorized joint in an interior winding; the team is swapping the coil with one used for the Light Pseudoscalar and Scalar Search (slow leak, so it can be used intermittently) while a re-manufacture of the coil is being arranged. Some tests on the Gun Test Stand regarding vacuum conditioning were also successfully performed. Lastly, the team completed the JLAMP Proposal for DOE Basic Energy Sciences.

Theory Center

A new chiral approach to analyzing reaction processes including the ground nonet pseudoscalar mesons has been developed <arXiv:0909.1606 [hep-ph]>. The approach treats effects of chiral symmetry breaking in the reaction processes without relying on any unphysical limits or expansion schemes and provides an appropriate theoretical basis for addressing the nature of broken chiral symmetry in the nonperturbative QCD domain. New chiral Ward identities for the gluon topological susceptibility and the decay amplitudes of π0, η, η′→ γ(*)γ(*) are derived, showing a significant role of the U(1) axial anomaly and the mass difference among u, d and s quarks in a model-independent way.

JLab's Safety Numbers

63 Days since Last Recordable Accident (JLab record: 331)
371 Days since Last Lost Workday Accident (JLab record: 676)

JLab Calendar of Events

Sept. 14 - Nov. 20: The Jefferson Laboratory Upgrade to 12 GeV INT Program
Sept. 17: JSA's Electronic Commerce Vendor Show
Sept. 18: Adopt-A-Spot Litter Pickup
Sept. 22-24: DOE SC OPA Independent Project Review of the 12 GeV CEBAF Upgrade Project
Sept. 24: Safety Shoe Vendor onsite
Sept. 29: Jefferson Lab's 25th Anniversary Celebration
Oct. 6: American Red Cross Blood Drive
Oct. 7: Safety Glasses vendor onsite
Oct. 8: Farewell Reception for Chief Scientist Tony Thomas
Oct. 20: Science Series Lecture - The Founders of Modern Astronomy
Oct. 28: William F. Brinkman, Director of DOE's Office of Science visits JLab
Oct. 29: Safety Shoe Vendor onsite




Environment, Safety, Health & Quality

September is National Preparedness Month. The steps to preparing for an emergency are: (1) get a kit, (2) make a plan and (3) be informed. When preparing for a possible emergency situation, it's best to think first about the basics of survival: fresh water, food, clean air and warmth. Here is a list of recommended items to include in a basic emergency supply kit:

  • Water, one gallon of water per person per day for at least three days, for drinking and sanitation;
  • Food, at least a three-day supply of non-perishable food;
  • Battery-powered or hand-crank radio and a NOAA Weather Radio with tone alert and extra batteries for both;
  • Flashlight and extra batteries;
  • First Aid kit;
  • Whistle to signal for help;
  • Dust mask to help filter contaminated air and plastic sheeting and duct tape to shelter-in-place;
  • Moist towelettes, garbage bags and plastic ties for personal sanitation;
  • Wrench or pliers to turn off utilities;
  • Manual can opener for food (if kit contains canned food);
  • Local maps;
  • Cell phone with chargers.

More information can be found on FEMA's Ready America website.


Flu Vaccine Still Available
Vaccinations are provided to JLab employees only. If you would like to receive seasonal flu vaccine, contact Occupational Medicine at x7539 to schedule an appointment. Keep in mind that for 15 minutes after vaccination, you should remain at JLab in the presence of other people and avoid safety-sensitive activities, including driving.
JSA Electronic Commerce Vendor Show
JLab staff, users and subcontractors are invited to attend the annual JSA Electronic Commerce Show, which will be held on Thursday, Sept. 17 from 9 a.m. to 2 p.m. in CEBAF Center. Meet the vendors, enjoy give-aways, free samples and refreshments.

JLab Adopt-A-Spot Litter Pick Up Set For Sept. 18
The next JLab Adopt-A-Spot Litter Pick up will be Friday, Sept. 18. Everyone at JLab is invited to take part in this community service project. Sign up on the webpage in advance so adequate supplies can be provided. Litter pick up will cover the sidewalk and grass areas paralleling Jefferson Avenue, from the JLab property line just south of Onnes Drive to Oyster Point Road. Meet in the CEBAF Center lobby at 11:15 a.m. for a short safety briefing, trash bags and to get area assignments. Wear comfortable clothes; a long-sleeved shirt, long pants and sturdy shoes and gloves are best. More information and an electronic volunteer signup sheet is available online. If you have questions, contact Deb Magaldi, x5102.

Learn About Influenza
Dr. Chandler will provide information about flu on Tuesday, Sept. 22 at 2 p.m. in the CEBAF Center auditorium. This question-and-answer session will include topics such as the biology, prevention and treatment of flu.

SRF Colloquium Set for Oct. 1
A special colloquium, High-Field Losses in SRF Cavities, will be presented by Gianluigi Ciovati of the Accelerator Division SRF Institute and recipient of the Presidential Early Career Award for Scientists and Engineers on Thursday, Oct. 1 from 3:30 to 4:30 p.m. in the CEBAF Center auditorium.

No Puttering Around: Register Now for Oct. 8 Golf Tourney
Dust off those clubs! It's time for the JLab 2009 Fall Golf Tournament. The event will be held Thursday, Oct. 8, at the Golden Horseshoe Golf Club (Green Course) in Williamsburg. Teams must have at least two JLab employees. Registration for JLab employees is $50 and for non-JLab employees is $65. To sign up, see Mike Zarecky, ARC 500/47. When you sign up, you must list your average score for 18 holes. Make checks payable to Mike Zarecky. The deadline for registering for the tournament is Friday, Oct. 2. If you have any questions, contact Danny Machie, x7501 or Mike Zarecky, x7609.