Jefferson Lab Weekly Briefs
November 13, 2013

Accelerator

Extra 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 will be several days of general housekeeping in the tunnel. Extra (volunteer) help will be needed. Tunnel housekeeping is being planned for Nov. 18-22, 8:30-11:45 a.m. each day.

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.

Physics

Jefferson Lab Published Articles, Nov. 4-8

  • J. J. Ethier and W. Melnitchouk, "Comparative study of nuclear effects in polarized electron scattering from 3He." Phys. Rev. C 88 054001 (2013).

Submit your papers for approval to the Jefferson Lab Publications database. The next Publications Refresher Course will take place Monday, Dec. 8 at 9 a.m. in CEBAF Center room F226. To attend, R.S.V.P. to Kim Kindrew.

ORCIDs Needed
Having an ORCID persistent digital identifier is one way to make sure that your publications are credited to you and not to another researcher with a similar name or initials. DOE's Office of Scientific and Technical Information (OSTI) is now keeping track of professional publications from research performed at Jefferson Lab through ORCID identifiers. To keep this information current and to get the credit you deserve for your publications, be sure to notify Kim Kindrew of your unique ORCID identifier.

Center for Theoretical and Computational Physics

A comprehensive analysis has been performed of the role of nonperturbative (or "intrinsic") charm in the nucleon, arising from five-quark components of the nucleon wave function represented by charmed mesons and baryons. A surprisingly dominant contribution is found to come from the D*0 Λc+ configuration, which, together with other meson-baryon components, produces an asymmetry between the charm and anticharm quark distributions at high momentum fractions x. The paper discusses how studies of charmed baryons and mesons in hadronic reactions can be used to constrain models, and how future measurements could provide benchmarks for establishing the presence of intrinsic charm in the nucleon.

JLab Calendar of Events

Nov. 14-16: Q-weak Collaboration Meeting
Nov. 18: Safety shoe vendor onsite
Nov. 20-23: CLAS Collaboration Meeting
Nov. 28-29: Thanksgiving Holiday, Lab closed
Dec. 11: Sentara Mobile Mammography Unit Onsite
Dec. 14: JAG Childrens 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

Ticks, Lyme Disease and the Fall
Many people take advantage of the cooler weather to play with their kids in newly raked leaves, to venture into the woods to enjoy the changing foliage colors or to clear away brush. Unfortunately, ticks carrying a variety of diseases, such as Lyme disease, are still active. Ticks may also be present around Jefferson Lab, and as we prepare for the cooler months, some workers may enter areas where ticks lurk.

The carrier for Lyme disease is the deer tick,. Another very common tick in Virginia, the lone star tick, can also transmit other diseases. Always take precautions when you are in the woods or brush areas. Use a spray to repel ticks and check yourself upon return. Don't forget to check your pets, as well, since they can also become infected with Lyme disease. The Centers for Disease Control and Prevention has very good infromation about ticks and tick-related illnesses and diseases. The CDC also offers guidance on how to remove a tick and on when you should report a tick bite to your doctor.

Computing and Networking Infrastructure

Systems Maintenance Period Scheduled for Nov. 19, 5-7 p.m.
There will be a CNI Systems Maintenance Period on Tuesday, Nov. 19, 5-7 p.m. During this time, the central general purpose Linux servers, jlabl1 and jlabl2, will be upgraded to Red Hat Enterprise Linux version 6, 32 bit. To ensure that your work is not affected, make sure you have logged out of those systems before 5 p.m. The new systems should be in place by 6 p.m. In addition, there will be intermittent network outages affecting offsite connections during the maintenance period. All offsite connections will be stable by 7 p.m. Updates to Firefox, Thunderbird and Java will be released to all managed Windows systems. Finally, Windows and Linux patches will be released to all managed desktop systems. These patches may require a reboot, so plan on rebooting your desktop system by Thursday, Nov. 21. If you have any questions or concerns, contact the IT Division Helpdesk at x7155.

Announcements

Sentara Mobile Mammography
The Sentara Mobile Mammography Unit will be at Jefferson Lab on Dec. 11, 9 a.m.-2 p.m. Mammography detects breast cancer, and The American Cancer Society recommends scheduling your first or baseline mammogram by age 40. It only takes 15 minutes! This service is open to all employees as well as their family members or friends as personal health insurances will be billed. To make an appointment, visit www.sentara.com and find Mobile Mammography Screenings under Screenings and Events or call 1-800-SENTARA (736-8272).

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

The cafe is accepting holiday dessert orders through Friday, Nov. 22 (*date corrected 11/18), 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.

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.

Richard Owen correctly guessed the location for Nov. 5. 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.