Jefferson Lab Weekly Briefs
May 7, 2014

12 GeV Upgrade

On May 3, the first beam was delivered to the front section of the beamline to Hall D, thus demonstrating that all 5.5 passes of the accelerator were functional, and there were no obstructions in the way of the beam. That was done with each linac operating at 550 MeV, and the machine was then scaled up to 950 MeV in each linac to achieve greater than 10 GeV beam after 5.5 passes. Stable 10.5 GeV beam reached the Hall D beamline early this morning (May 7). This significant accomplishment completes a major 12 GeV Project milestone and puts Jefferson Lab one step closer to approval of Critical Decision-4A (Accelerator Project Completion and Start of Operations). It also sets a new energy record for beam from CEBAF. Authorization to put this beam into the Hall D tagger vault is being evaluated by the Chair of the Accelerator Readiness Review Committee, Manager of the DOE Site Office, and the Lab Director. When the authorization is given, the Head of Accelerator Operations and the commissioning team will send the beam down the new beamline into the Hall D tagger vault for the first time.


JSA Sabbatical and Research Leave Support at Jefferson Lab
The JSA/JLab Sabbatical and Research Leave Support Program enhances research opportunities for faculty through access to Jefferson Lab facilities and interaction with Jefferson Lab researchers and users, strengthens the teaching and research capabilities of universities through faculty involvement, and strengthens the research programs of Jefferson Lab by attracting "new blood" and integrating university faculty members in the lab's programs. JSA will award living expenses up to $1,500 per month for up to twelve months to qualified faculty members to relocate to the Hampton Roads area to conduct full-time research at Jefferson Lab while on an approved sabbatical or research leave. For eligibility and application information, see the JSA website. Application deadline is June 2.

Jefferson Lab Published Journal Articles, April 28-May 2

  • P. Jimenez-Delgado and E. Reya. "Delineating parton distributions and the strong coupling." Phys. Rev. D 89 074049 (2014).

Remember to submit your papers for approval to the Jefferson Lab Publications database.

Records and Information Management Month Ends
Thanks for playing the Weekly RIM Trivia Questions during RIM month in April. The winner of the final Starbucks gift card was Katherine Wilson, whose name was randomly selected from those who answered last week's trivia question correctly. The answer was "Kamino." Until next April, remember, "Records management is everyone's responsibility!"

Center for Theoretical and Computational Physics

The study of baryons in lattice QCD with different number of colors, Nc, has recently become available, with simulations carried out at different values of the quark masses, down to the realm where chiral symmetry plays an important role, and with Nc= 3, 5 and 7. Recent work has analyzed the lattice results for baryon masses within a framework that combines an expansion in 1/Nc and chiral perturbation theory, and constrains the Nc dependene of certain low energy constants. The new scheme helps to organize and understand baryon physics with the aid of an expansion in 1/Nc and to elucidate the spin-flavor properties of baryons.


The Machine Shop is presently manufacturing or continuing to manufacture:

  • Multi-spoke superconductive cavity, 500 MHz full size spoke die assembly and a full-scale copper mock-up of the cavity;
  • Core extensions and core modifications for CX, CW, and CV dipole magnets;
  • For the Hall C Super High Momentum Spectrometer, SIV SLIT Vacuum Box Assembly (final machining complete, waiting for final assembly);
  • Forty 304 stainless steel fundamental waveguide warm window flanges;
  • A miniMott load chamber for the injector group;
  • An insertion dump viewer body for the Hall A beam dump; and
  • Various small machining jobs for lab customers.

Facilities Management and Logistics

Parking Lot Closure
The parking lot on the northeast side of the Test Lab, Bldg. 58, will be closed May 8-11, so that the surface can be seal coated and striped. No vehicles will be allowed in the area during that time. All will need to use other parking lots. If you have any questions about this project, contact Suresh Chandra, x7248.

Spring Cleanup Underway
Jefferson Lab’s lab-wide spring cleanup is this week. All managers are responsible for ensuring the participation of their individual staffs. The goal is to clean up individual work areas, as well as to remove scrap wood, cardboard, metals, trash and any excess items that may have piled up over time both indoors and out. Contact the Property Office at x7348 for the removal of excess and unused equipment, furniture and materials.

During the cleanup, please be careful not to mix recyclables. In other words, wood scrap, recyclable metals, cardboard, paper and other permissible recyclable office waste go into the proper collection containers at the Central Materials Storage Area (CMSA). General waste is to be collected and brought to the CMSA’s “trash” compactor. For those who do not have access to the CMSA, the gate will be open daily this week, 10 a.m.-2 p.m., for your convenience.

If you have questions or need assistance, contact Mike Lewellen, x7169, or Tony Sessoms, x7348.

Environment, Safety, Health and Quality

Portable Generator Safety
We are fast approaching the summer season here in Hampton Roads, and with that come hurricane season and higher temperatures. While portable generators can be a good source of temporary power during weather-induced electrical outages, these generators also can prove to be dangerous or even deadly if used improperly. Following some simple precautions can keep you and others safe from the dangers of electric shock and carbon monoxide poisoning resulting from improper use of a portable generator. Here are some safety tips to follow:

  • Do not connect the generator directly to the house wiring, use an approved transfer switch;
  • Use Ground Fault Circuit Interrupters (GFCIs) with the generator if they are not already built in;
  • Make sure extension cords have no damage and are of a sufficient size for the load to be powered;
  • Do not use the generator inside your home/garage - operate it in a well-ventilated area outdoors away from windows, doors and vents;
  • Make sure your home has a working carbon monoxide alarm; and
  • Always turn the generator off and allow it to cool down before fueling.

As always, follow the manufacturer guidelines for setup and operation. It is also strongly recommended to have a licensed electrician install your home generator.


Open House Volunteers Still Needed
Jefferson Lab's 2014 Open House is scheduled for Saturday, May 17. The key to the event's success is our volunteers. You and your co-workers, members of our user community, students and family members over 13 years of age are needed to fill the variety of volunteer taskings for the event. We need scientists and non-scientists, engineers and non-engineers, and technical and administrative staff. You can work the whole event (eight hours) or a four-hour shift (morning or afternoon). Non-exempt employees will be paid, with advance approval from their supervisors. To volunteer, sign up as soon as possible. If you have any questions, contact Open House Volunteer Coordinator, Tina Menefee, 768-4030.

See Jefferson Lab Researchers Speak at Particle Fever Debut
Three researchers affiliated with Jefferson Lab will give presentations at a local showing of "Particle Fever." The film gives audiences a front row seat to a profound scientific breakthrough as it happens - the confirmation of the existence of "the god particle." Particle Fever follows six brilliant scientists during the launch of the Large Hadron Collider in Switzerland. Directed by Mark Levinson, a physicist turned filmmaker, and edited by Walter Murch (Apocalypse Now, The English Patient), Particle Fever is a celebration of discovery, revealing the very human stories behind this epic machine. The film will be shown on May 14 at the Naro Expanded Cinema in Norfolk. The post-film discussion will be led by three researchers affilitated with Jefferson Lab: Charles Hyde, a professor of physics at ODU who is working to understand how the interactions of quarks and gluons generate the 98 percent of the mass of ordinary matter that is not generated by the Higgs field; Larry Weinstein, a professor and eminent scholar in physics at ODU and author of "Guesstimation: Solving the World's Problems on the Back of a Cocktail Napkin," and Todd Satogata, a senior scientist at Jefferson Lab who has designed, built and operated particle accelerators for 25 years.

Jefferson Lab Calendar of Events

May 17: JLab Open House: Accelerating Discovery
May 19: Safety Shoe vendor onsite
May 19-22: Program Advisory Committee, PAC41
May 26: Memorial Day holiday, Lab closed
May 27-29: Hypernuclear Collaboration Meeting


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.