Jefferson Lab Weekly Briefs
December 4, 2013

12 GeV Upgrade

Significant progress continues to be made as the 12 GeV Upgrade Project transitions from construction to pre-operations and commissioning of the accelerator. The first phase of the Accelerator Readiness Review (ARR) is complete, and the letter approving the start of accelerator commissioning has been received from the Thomas Jefferson Site Office. In the experimental halls, the new detectors are being assembled/upgraded and installed in both Halls B and D. In Hall C, the Super High Momentum Spectrometer carriage and detector hut are taking shape, and Hall A is preparing for the ARR Phase 2.

It is important to remain focused on safety as the remaining accelerator work is done. The lab has revisited the near-term schedule to ensure that the work load can be completed without jeopardizing safety. Everyone is reminded that safety is not a passive process, and all must actively evaluate the hazards of the tasks at hand. If there are any questions or concerns, always stop, assess, resolve and then move forward.  


Jefferson Lab Published Articles, Nov. 25-29

  • William P. Ford and J. W. Van Orden, "Off-shell extrapolation of Regge-model NN-scattering amplitudes describing final-state interactions in 2H(e,e'p)." Phys. Rev. C 88 054004 (2013).

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 Physics

There is growing evidence for the existence of hadrons that fall beyond the ordinary quark-antiquark classification. A new paper applies low-energy constraints to compute the Regge trajectory containing the scalar σ meson. The resulting trajectory is found to be very different from quark model expectations, which adds to the mounting evidence that the σ meson is not an ordinary quark-antiquark resonance.


There is an update to the 12 GeV Machine Configuration Beam Transport drawings (common name is songsheets). There are 43 new drawings that have the finalized names and locations of equipment throughout the accelerator and the halls. Web links to these drawings should be available within the next week.

The Document Control Office, located on the 2nd floor of the ARC Building, no longer posts the names of authorized personnel allowing "after-hours" access. After-hours access to the Document Control Office is only available using the current procedure of contacting the Security Office, who in turn will contact Butch Dillon-Townes, Terrie Fuell or Bridget Paul for permission to enter the office.

JLab Calendar of Events

Dec. 9: Safety Shoe vendor onsite
Dec. 11: Sentara Mobile Mammography Unit Onsite
Dec. 11: Requirements Briefing for Lab-Sponsored Travelers
Dec. 14: JAG Children's Holiday Party
Dec. 16-17: Gamma-Z Workshop
Dec. 16-18: Hall A Collaboration Meeting
Dec. 23-Jan. 1: Holidays & Shutdown Days, Lab closed

Environment, Safety, Health and Quality

Fluorescent Light Bulb Safety and Disposal
Fluorescent light bulbs, including compact fluorescent light bulbs or CFLs, are used throughout Jefferson Lab and your home. Fluorescent bulbs contain 4-20 milligrams of mercury, depending on the type of bulb; even bulbs with "green tips" still contain mercury. Mercury is hazardous if inhaled or touched, so special precautions should be taken if a bulb is broken and when disposing of non-functioning bulbs to keep mercury out of the environment. The following bullets provide information on recycling bulbs at work and at home.

At work:

  • Bulbs are changed and handled for recycling by Facilities Management and Logistics and ESH&Q;
  • Specific waste regulations must be followed. Unless you are trained, do not change bulbs yourself, submit a work request; and
  • If you break a fluorescent bulb or find a broken bulb, contact the Industrial Hygiene group, x6254 or x7882.

At home:

  • Bulbs can be recycled through your city/county solid waste management agency through household hazardous waste programs; see the appropriate city/county website at the link for details on collection times;
  • Some local businesses also accept used bulbs for recycling; and
  • If you have a broken fluorescent bulb at home, follow these instructions from the Environmental Protection Agency.

The Department of Energy website is currently featuring a piece on The History of the Light Bulb for consumers. For more information on what to do in case of mercury contamination at home, see this EPA website.


Personal Dosimeter Changeout Set for Monday, Dec. 16
Jefferson Lab's semi-annual personal dosimeter changeout will take place mid-afternoon on Monday, Dec. 16. This includes the dosimeters of all lab staff, users and subcontractors. If you won't be using your dosimeter during the changeout period, place it in its assigned place in the dosimetry racks for the changeout. If you need to use your dosimeter during the changeout period on Dec. 16, you may exchange it that morning in the Radiation Control Dosimetry Office in Bldg. 52B, Room 4, 8 a.m.-1 p.m. If you have questions, contact Becky Mosbrucker, x7236.

Travel Requirements Briefing for Travelers
All personnel who engage in lab-sponsored travel should attend a Dec. 11 briefing on lab policies, procedures and practices. Gain a better understanding of DOE's conference attendance and foreign travel requirements, and get your travel questions answered. The briefing will take place in the CEBAF Center auditorium, 2:30-3:30 p.m. Questions about the briefing may be directed to Carol Kinsey, x7519.

Lab Phones to Display Tornado Siren Notification for Friday Test
Jefferson Lab's tornado warning siren will undergo its monthly operational test at 10:30 a.m on Friday, Dec. 6. In addition, a text alert notification will also be issued to all Cisco IP Phones onsite. The text will appear in the message box of desktop Cisco phones. Don't respond to the siren; this is a test of the siren system and not a personnel response exercise. If this were an actual Tornado Warning, this message would direct you to take cover immediately in a Severe Wind Take Cover area.

The latest "Montage" by Lab Director Hugh Montgomery has been posted to the website. In this newest article, titled "LDRD, Investing in Ourselves," Mont explains the impetus behind and the purpose of the Lab-Directed Research Funding plan.

Sentara Mobile Mammography
This is your last chance to make your appointment for the Sentara Mobile Mammography Unit, which will be at Jefferson Lab on Dec. 11, 9 a.m.-2 p.m. To make an appointment, visit and find Mobile Mammography Screenings under Screenings and Events or call 1-800-SENTARA (736-8272).

Open Enrollment Underway for GSRA
The 401(k) Group Supplemental Retirement Annuity (GSRA) Open Enrollment for Calendar Year 2014 is offered through Dec. 13. All elections will be reflected in the Jan. 15 paycheck.

2014 General Access RWP Is Available
The 2014 General Access Radiological Work Permit (RWP) is now available for signature. If you are a radiation worker at Jefferson Lab, you must sign the new RWP before Dec. 31 to retain your accelerator site access. To access the RWP, visit the web-based training page and open document SAF801kd. You may access, read and sign this document from offsite. If you have questions about the permit, contact Radiation Control at 876-1743.

Holiday Party for Jefferson Lab Children and the Young at Heart
The JAG Children's 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:

  • Craft-table monitoring – All crafts and supplies are provided;
  • Game Helpers – Monitor participants and hand out prizes;
  • Snack Area – Replenish platters and general area maintenance; and
  • Santa's Helpers – General lobby monitoring and crowd control.

Toys for Tots Toy Drive
Jefferson Lab is participating in the U.S. Marine Corps Reserve's annual Toys for Tots toy drive. Collection boxes have been placed near the main entrances of CEBAF Center, MCC, SSC, ARC and TED Buildings. Leave your donation of a new, unwrapped toy for a child aged 12 and under in a collection box by Friday, Dec. 13, or bring your donation to the Children's Holiday Party on Saturday, Dec. 14.

Ready, Set, Hang Those Decorations
The JAG 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
Little Thomas is visiting all corners of the Jefferson Lab campus. If you can identify his location this week, email Kandice Carter with your guess. Guesses are accepted through Friday.

Silvia Niccolai, Maurizio Ungaro, Ron Bartek and Jason Willoughby correctly guessed the location for Nov. 27. Honorable mentions go to Anna Shabalina, April Sessoms, Marcy Stutzman, Debra Brand and Michael Haddox-Schatz. Check out Tracking Thomas on flickr for a better view of his last location and this week's new mystery photo.

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.