Jefferson Lab Weekly Briefs September 29, 2010

Jefferson Lab Weekly Briefs
September 29, 2010


AIP State Department Fellowship Application Deadline is Nov. 1
Qualified scientists at any stage of their careers who are U.S. citizens, have a Ph.D. in physics or closely related fields, are members of one or more of AIP’s 10 member societies and are eligible to receive appropriate security clearances are encouraged to apply. Final interviews will take place early in 2011 and the 12-month Fellowship term will begin in September 2011. For more information and to apply, visit the AIP website.


The summer Scheduled Accelerator Down ended on Sept. 27 and operations personnel started to deliver continuous wave beam to Hall B. The hall reported that the beam quality was good. Neither Hall A or Hall C is ready for beam. Injector gun2 is operating at 130 kilovolts. The restoration of beam after the SAD went well.

Free-Electron Laser

Operational characterization of the ultraviolet FEL continued last week, with a number of gain and power measurements. The team was able to produce over 1 kilowatt in macropulse operation and measured small signal gains exceeding 100 percent. The team also took electron beam performance data from the injector with low emittance being achieved for the 60 picocoulomb performance of the UV setup.

Center for Theoretical and Computational Physics

To describe deep-inelastic scattering at small values of Bjorken-x (where x is the momentum fraction carried by partons in the nucleon) at next-to-leading order (NLO) accuracy requires both the Pomeron intercept and the impact factor, or the amplitude of production of the Pomeron by the virtual photon at NLO. While the Pomeron intercept was calculated more than 10 years ago, the analytic expression for the impact factor has just been computed in a new paper by Theory Center staff <arXiv:1009.4729>. This result will be important for understanding data in high-energy experiments, such as those planned for a future Electron-Ion Collider.

Facilities Management and Logistics

New Accelerator Site Entrance Opens this Saturday
The new CEBAF Accelerator Site entry gate on Hadron Drive is scheduled to open at 9 a.m. on Saturday, Oct. 2. At that time, the gate on SURA Road will close permanently. The new entry point is located on Hadron Drive; Hadron Drive now extends from Rattley Road to the accelerator site, passing behind the Experimental Equipment Lab (Bldg. 90) and the Test Lab (Bldg. 58) and between the Test Lab and Radiation Control buildings (Trailer 52B).

JLab Calendar of Events

Oct. 5: Safety Shoe Vendor onsite
Oct. 5: American Red Cross Blood Drive
Oct. 5: Science Series: Einstein for Everyone
Oct. 13-15: Nucleon Structure at Large Bjorken x (HiX2010) Workshop

JLab's Safety Numbers

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

Computing and Networking Infrastructure

CNI Group Begins Managing Mac Systems
Starting on Monday, Oct. 4, the CNI group will begin contacting all owners of JLab-owned Macintosh systems and incorporating them into the JLab CUE environment. This environment will allow access to CUE home directories and group areas and provide anti-virus and patch management features to the system. For more information, contact the IT division Helpdesk at x7155 or


United Way Campaign at JLab Kicks Off With Oct. 7 Picnic and Raffle
The United Way annual fund-raising campaign at JLab kicks off Thursday, Oct. 7, with a picnic lunch at Quark Cafe, 11:30 a.m.-1:30 p.m. The picnic will take place in the CEBAF Center lobby and will feature hot dogs, hamburgers, veggie burgers, chips, sodas and bottled water for $1 per item donation to United Way. Senior JLab leadership will serve the food, and the Quark Cafe will be open with side dishes for purchase. The food and beverages are being donated by the Quark Cafe contractor, Eurest.

A United Way fund-raising raffle for two 16 gigabyte iPads also will begin during lunch on Oct. 7. Raffle tickets will be $1 each and may be purchased at a table in the CEBAF Center lobby, 12-1 p.m., on workdays through Oct. 27. A winning ticket for each iPad will be drawn during the Jefferson Activities Group's Oktoberfest on Wednesday, Oct. 27. Winners need not be present to win and will have until Monday, Nov. 1 to claim their iPads.

All money collected through the picnic and raffle will go to the United Way to support community services.

American Red Cross Blood Drive
The next American Red Cross Blood Drive is scheduled for Tuesday, Oct. 5, 10 a.m.- 4 p.m. in CEBAF Center, Room F113. New and repeat donors are encouraged to attend. Appointments and walk-ins are welcome. To schedule an appointment, e-mail or call Johnie Banks at x7539.

JLab's BEAMS Outreach Program Needs Your Help
Becoming Enthusiastic About Math and Science, Jefferson Lab's long-running math and science enrichment program, needs your help. Nearly 1,500 students and their teachers visit JLab each school year to participate in science and math activities conducted by scientists, engineers, technicians and administrators. Volunteers spend about 75 minutes in a BEAMS classroom (VARC 72A & 72B), either leading an activity or assisting students as they carry out an activity. Volunteers are also needed to provide 15-minute role model visits in their office or other appropriate work area for the students. For additional information, contact Christine Wheeler at x7560.

Einstein For Everyone Kicks Off Fall Science Series Lecture Series
The first fall Science Series lecture is set for 7 p.m. on Oct. 5 in the CEBAF Center auditorium. Robert Piccioni, author of "Everyone's Guide to Atoms, Einstein and the Universe," will discuss how Einstein overcame rejection to become the most famous scientist in history. Science Series lectures are free and open to the public.

Flu Vaccines Now Available
The annual JLab flu vaccination program for employees has begun. Based on experience from previous years, the lab has 250 doses. If you are a JLab employee and would like to be vaccinated, schedule an appointment with Occupational Medicine at x7539. Vaccination typically takes less than 15 minutes. For more information about vaccination, visit the Centers for Disease Control and Prevention website, or contact your personal physician or Smitty Chandler at x7455.