Jefferson Lab Weekly Briefs October 7, 2015

Jefferson Lab Weekly Briefs
October 7, 2015


Jefferson Lab Published Journal Articles, Sept. 28-Oct. 2

  • I. G. Aznauryan and V. D. Burkert. "Electroexcitation of the Delta(1232)3/2+ and Delta(1600)3/2+ in a light-front relativistic quark model." Phys. Rev. C 92, 035211.
  • Tech Note: Haipeng Wang. "Beam Diagnostic System Analysis in HIRFL-CSRm at Institute of Modern Physics, China for the Bunched Electron Cooling Demo Experiment." JLAB-TN-15-039.
  • Tech Note: Haipeng Wang et al. "Alternative Estimate of the Required Power for the SLAC Transverse Stripeline RF Kicker to be Used in the MEIC Circular Cooler Ring by Analytics and CST Simulations." JLAB-TN-15-040.
  • Tech Note: Haipeng Wang et al. "Transient Time Factor of an Ion Linac and its Efficiencies for Different Species Acceleration at Different Geometry Beta Sections and Stripping Energies." JLAB-TN-15-041.
  • Jonathan Crumpler et al. "PEPII Magnet Feasibility in the MEIC Electron Collider Ring." JLAB-TN-15-031.

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

Center for Theoretical and Computational Physics

Two-nucleon axial charge and current operators are derived in chiral effective field theory up to one loop order, using time-order perturbation theory. The resulting axial current is finite and conserved in the chiral limit, while the axial charge requires renormalization. A complete set of contact terms for the axial charge up to the relevant order in the power counting is constructed.


The Alignment group has been busy the past few weeks with the following projects:

  • Aligning the five meter magnet measurement stand in the Jefferson Lab Magnet Measurement Facility;
  • Aligning the Hall A Halo girder;
  • Fiducializing and aligning the injector bubble chamber;
  • Conducting control surveys (updating existing monumentation) in lines A, B, C, the Beam Switchyard, the West Arc and the southwest corner areas;
  • Conducting control and elevation surveys in Hall D, which involves tying in the main accelerator to the surface and back into the hall;
  • Alignment of the laser pointing device for Hall B's Low Threshold Cherenkov Counter detectors (Units 1 and 2 of six);
  • Surveying and adjusting the Hall B torus magnet with all six cryostats in position (Adjustments were made to achieve the design geometry. This was carried out twice as equipment was added.);
  • Assisting the Cryogenics group with alignment of the North Linac cryo pipes;
  • Aligning the rails and piers for the LCLS-II/SRF group;
  • Control monument installation and measurement for the Injector Test Cave; and
  • Aligning Hall A's Moller magnet mapper.

Jefferson Lab Calendar of Events

Oct. 8-10: GlueX Collaboration Meeting
Oct. 16: Red Cross Blood Drive
Oct. 19: NSAC Long Range Plan presentation
Oct. 21-23: CLAS Collaboration Meeting
Oct. 26-28: HPS Collaboration Meeting
Nov. 16-17: Q-weak Collaboration Meeting
Nov. 26-27: Thanksgiving holiday; Lab closed

Environment, Safety, Health & Quality

Resolving ES&H Concerns
To ensure your welfare and productivity, Jefferson Lab has several mechanisms for employees, or anyone who comes into contact with the lab, to report issues potentially affecting the safety of workers, visitors, lab neighbors or the environment without fear of retaliation or reprisal. ES&H Manual Chapter 2310 lists a variety of mechanisms for resolving and reporting ES&H concerns and for preventing similar concerns from occurring in the future.
Here is a list of the options you have for resolving an ES&H concern:

  • If possible, resolve the ES&H concern yourself.
  • If you are unable to resolve the concern yourself, refer the concern to your supervisor  and management chain using the mechanisms outlined here.
  • You may also consult your Safety Warden, Division Safety Officer, your representative to the Worker Safety Committee, or contact an ESH&Q staff member directly for any ES&H concerns you may have.
  • If you would like to remain anonymous, or if you feel that it is more appropriate, use Jefferson Lab’s Employee Concerns Program.
  • If one or more of the above steps have not resulted in resolution of the concern, or if you feel that it is more appropriate, you may also use the formal DOE Employee Concerns Management System hotline at 800-676-3267.
  • Or use this link to the form for the DOE's Differing Professional Opinion (DPO) process also found in DOE Order 442.2 or by calling or emailing the DOE DPO Manager, Scott Davis, at 301-903-9641.

The DOE DPO process ensures that all JSA employees and contractor employees have the right to report environment, safety, and health technical concerns that have not been resolved through routine work processes.

Once your concern has been addressed, communicate any lessons learned to your staff, co-workers, supervisors and your Division Lessons Learned Coordinator. ES&H Manual Chapter 2310 offers more information on concern resolution.

Computing and Networking Infrastructure

Video Teleconference Requests
There has been an uptick in video teleconference (VTC) and meeting room requests. This includes BlueJeans audio and/or video connections, streaming and recording, wireless assistance for conference attendees, and hardware problems in meeting rooms. CNI asks that you please submit VTC requests at least one week prior to your event, so that the group can schedule activities. With sufficient notice, the group can better accommodate your needs and avoid Helpdesk interruptions and delaying other requests. Thank you for your patience and understanding as the group continues to make changes to better accommodate the lab's needs. ​You may submit a VTC request through the Computer Center Problem Reporting system or by contacting the ​IT Division Helpdesk, x7155.

Central File Server Outage Planned for Tuesday, Oct. 20, 5:30-7 p.m.
During the upcoming IT Division Maintenance Period, CNI is currently planning to upgrade the central file server for /group, /site, /apps (K, L and M drives). The file server will go offline at around 5:30 p.m. and should be back up and serving data by 7 p.m. Note that this may cause Jefferson Lab-managed web servers to be inaccessible, as well as other central services that depend upon the group file server. Plan your work around this important outage. If you have any questions or concerns, contact the IT Division Helpdesk, x7155.


Volunteer for the Poquoson Seafood Festival
Sign up now to represent Jefferson Lab at an upcoming festival! Volunteers are needed to engage festival goers with hands-on science demos, to hand out neat giveaways and informational brochures to interested attendees, and to chat about Jefferson Lab, its basic mission, and his/her own position at the laboratory at the Poquoson Seafood Festival, Oct. 17-18. Science demo materials, along with suitable background information on the demos and the laboratory will be provided. A member of Jefferson Lab's Public Affairs staff or an experienced volunteer will be present for each shift. Festival logistics information (volunteer parking, setup, etc.) will be provided to volunteers in advance. Volunteers may choose to sign up for just one half-day shift or two shifts to stay the whole day. Sign up via the link, or, if you have any questions about volunteering, contact Mike Robbins, x7617.

Red Cross Blood Drive Scheduled for Friday, Oct. 16
The next American Red Cross Blood Drive will take place Friday, Oct. 16, 10 a.m.-4 p.m. in CEBAF Center room F113. New and repeat donors are encouraged to attend. To schedule an appointment, visit and enter Sponsor Code: TJNAF. You can also schedule an appointment by contacting Johnie Banks at or x7539. Visit the website for donation eligibility requirements.

Radworker I and Radworker II Classes Offered in October
A full-day Radiation Worker I class is scheduled for Monday, Oct. 12, and a half-day Radiation Worker II class is scheduled for the morning of Tuesday, Oct. 20. The classes will be taught in the ARC, exact location TBD. To attend the class, register through the Learning Management System or by contacting Maya Keller at x6021.

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.