Jefferson Lab Weekly Briefs
April 16, 2014

12 GeV Upgrade

At the request of DOE's Office of Nuclear Physics, Stephen Meador, Acting Director of the Office of Project Assessment in DOE's Office of Science, convened a team of 16 experts and eight observers in an Independent Project Review of the 12 GeV CEBAF Upgrade Project at Jefferson Lab April 8-10. The purpose of the review was to assess all aspects of the project, including technical, cost, schedule, management and ES&H. The review team provided valuable feedback in all areas and a total of 12 specific recommendations in the areas of superconducting magnets and project management. The committee congratulated the 12 GeV Team on the significant progress made in the accelerator and experimental hall detectors, as well as the project’s safety record and lab implementation of the Accelerator Readiness Review and commissioning processes.


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 in June 2.

Jefferson Lab Published Journal Articles,  April 7-13

  • Carlos Salgado, et al. "On the partial-wave analysis of mesonic resonances decaying to multiparticle final states produced by polarized photons." Phys. Rept. 537 1 (2014).
  • K. Allada et al. (Jefferson Lab Hall A Collaboration). "Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized 3He Target." Phys. Rev. C 89 042201(R) (2014).
  • Chien-Yi Chen et al. "Next-to-minimal two Higgs doublet model." Phys. Rev. D 89 075009 (2014).
  • Wesley Gohn et al. "Beam-spin asymmetries from semi-inclusive pion electroproduction." Phys. Rev. D 89 072011 (2014).
  • Raúl A. Briceño et al. "Two Baryons with Twisted Boundary Conditions." Phys. Rev. D 89 074509 (2014).

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

Records and Information Management Month Fact of the Week
Leaving the lab? JLab Records Management provides a list of activities employees who are departing the lab should review to ensure their records are adequately protected and transferred to their supervisor or co-worker. Review the information at this link.

RIM Trivia Question of the Week
The correct answer to last week's question was "evaluated or summarized data." There were no correct answers last week, so this week we will give away two Starbucks gift cards to two randomly selected individuals who provide the correct answer to this trivia question: One of the patron saints of archivists, this individual was executed in the 3rd Century by being roasted on a large gridiron. He is also the patron saint of librarians, deacons and cooks. All responses must be received at by noon on Friday, when a drawing will take place of all correct answers. Two people will each win a Starbucks gift card! (Winners will be notified via email no later than 5 p.m. Friday following publication. Limit one gift card win per person.)

Center for Theoretical and Computational Physics

Amplitude analysis of two-photon production of ππ and KK, using S-matrix constraints and fitting all available data, including the latest high statistics results from Belle, yields a single partial wave solution up to 1.4 GeV. The two-photon couplings of the σ/f0(500), f0(980) and f2(1270) are determined from the residues of the resonance poles. Thanks to the very recent construction of a dispersive framework for Light-by-Light reactions, the results presented in the new analysis will bring a new precision to the on-going calculation of the hadronic contribution to the anomalous magnetic moment of the muon. Reducing these uncertainties is essential if new experiments planned at Fermilab and J-PARC are to deduce hints of physics beyond the Standard Model that can compete with a series of Jefferson Lab experiments, such as Q-weak and APEX.


In the last six weeks, the Installation and Vacuum groups completed their 12 GeV beam transport work. This work included quadrupole girder swaps in the tunnel sections to Halls A, B and C. This work also involved beam pipe installation with leak checking.
The Hall D Tagger building had an extensive amount of work completed:

  • SEG block shielding walls were constructed, girders and beam pipe were installed;
  • Instrument air and low conductivity water lines were run and connected;
  • The beam dump was installed;
  • Dump pump and resin skids were fabricated and installed;
  • Dump piping was fabricated, welded and installed.

The Cryogenics group provided installation with two skilled welders to work the skids and piping for the Hall D dump, and they were instrumental in completing this work on schedule.

The Installation group also worked on hot hheckout for the accelerator, supported EES with power supply moves, and completed LCW work to the radiofrequency separator amplifiers. Ahead of the summer down, work has begun on the Hall C Moeller and Compton projects, and prep work has been done for the dogleg magnets upgrade. Additionally shimming of the Hall B beamline was completed to accommodate the raised beam height.

Facilities Management and Logistics

Jefferson Lab Parking Lots to Be Closed April 26-27 for Markings Painting
On Saturday, April 26, and Sunday, April 27, road traffic markings and parking lot markings are scheduled to be re-painted. If the weather conditions are not favorable that weekend, the work will be re-scheduled for the following weekend. Parking will be limited onsite to specific areas. For a list and map of available parking areas during the work, see the full announcement.

The subcontractor will provide traffic control to ensure the safety of its crews while also allowing traffic to continue to flow in and about the lab. Awareness of their presence as well as adhering to the traffic controls is required. Refer to the attached PDF to see the scope or the project. All road traffic markings and highlighted parking areas are scheduled for re-painting. Thank you for your attention to this work.

Jefferson Lab Calendar of Events

April 18-19: USQCD All-Hands Meeting
April 22: Colloquium & Public Lecture
April 22-23: APEX Collaboration Meeting
May 7: JAG Annual Run-A-Round
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

Environment, Safety, Health and Quality

Mismatched Caps
Recently at another DOE facility, a potentially dangerous situation was discovered involving a carboy containing a hazardous chemical. In order to move it from one location to another, an employee grabbed the nearest cap to seal the container. Unknown to the worker, the cap selected, while it "sort of fit" on the carboy, would not have contained the chemical. Before there was an incident, it was determined that the cap used was not correct.

The investigation found that three types of similar looking and sized caps were used in the chemical area. Some caps had six threads per inch and others had eight threads per inch, while the third had a slightly larger diameter. Obviously, using a matched size and thread type cap is critical for chemical safety. However, this should be applied to other containers as well. Make sure the original cap is kept with the container when it is removed. This applies to any size or type container and not just carboys of hazardous chemicals. The injury you may prevent could be your own.


Computing and Networking Infrastructure

Network Outages planned for Tuesday, April 22, 5-7 p.m.
On Tuesday, April 22, starting at 5:30 p.m., the following areas will have brief network outages for the installation of updated software on the network switches. Each outage should last no more than 15 minutes. During the outage, Cisco phones will reset. Areas that will be affected include:

  • CEBAF Center (Bldg 12) A, B, C, and F wing office spaces and conference rooms;
  • Experimental Equipment Lab (Bldg 90);
  • Building 36 (excluding accelerator controls networks);
  • Support Service Center (Bldg 28);
  • Applied Research Center; and
  • Counting House (Bldg 97) second floor.

If you have any questions or concerns, contact the IT Division Helpdesk, x7155.


Jefferson Science Associates Minority/Female Undergraduate Research Assistantship
Jefferson Lab is seeking candidates for a research assistantship. JSA will provide funds to support the student at the university during the 2014-2015 academic year. This project is supported by the JSA Initiatives Fund Program, a commitment from the JSA owners, SURA and PAE Applied Technologies. Initiatives Funds support programs, initiatives, and activities that further the scientific outreach, promote the science, education and technology of the Jefferson Lab and benefit the Lab’s extended user community in ways that complement the lab’s basic and applied research missions. Nominations will be accepted through May 2. For more information, visit the website.

TIAA-CREF Individual Counseling Available by Appointment
TIAA-CREF will be offering additional Individual Counseling Sessions in June. The consultant will be available to discuss how to help you achieve your financial goals by investing in financial solutions such as mutual funds, brokerage, life insurance and annuities. Sessions will be offered on Thursday and Friday, June 19-20, 8:30 a.m.-5 p.m. in Support Service Center Room 21. To schedule an appointment with a TIAA-CREF Individual Consultant to discuss your plan and options for managing your retirement savings, call TIAA-CREF at (800) 732-8353, Monday through Friday, from 9:00 a.m. to 8:00 p.m. (ET).

Dark Forces, Dark Matter, and the GeV-Scale Discovery Frontier
The search for dark matter and new forces mediated by sub-GeV particles with very weak coupling to matter (“dark forces”) is an emerging frontier in fundamental physics. Philip Schuster, a Faculty Member of the Perimeter Institute for Theoretical Physics and a SLAC Research Associate, will present the theoretical motivations for dark forces and their possible connections to dark matter and the anomalous magnetic moment of the muon. He will also discuss strategies, results, and prospects for searches at high-energy colliders, flavor factories, and dedicated fixed-target experiments, focusing particularly on the near-term program of searches for dark forces at Jefferson Lab, including APEX in Hall A and HPS in Hall B. He will also briefly describe opportunities to directly search for dark matter at Jefferson Lab in the future. The colloquium will be held on April 22 at 3 p.m. in the CEBAF Center auditorium.

Annual Property Training & Validation Due April 18
Jefferson Lab’s annual Property Custodian Training and annual Property and Key Validations must be completed by Friday, April 18. During this period, all Jefferson Lab property custodians are required to complete their Annual Property Custodian Refresher Training (GEN 150) and then conduct their annual Property and Key Validations. If you have property or property validation process questions or concerns, contact the Property office at x7348, Monday – Friday, 8 a.m. - 4 p.m. or email Every person who has one or more Jefferson Lab keys must also validate each key issued to them. If you have any non-essential or non-functional lab keys, return them to Dennis Merritt, Mail Stop 28G. If you have questions about the key validation process, contact Dennis Merritt.

Student Projects, Volunteer Mentors Needed for High School Interns
Six outstanding high school students have been selected to participate in the lab's High School Summer Honors Program, which will be held June 23 - Aug. 1. Critical to the success of their internship experience are projects for the students and mentors who can oversee one or more students as they carry out their work. The students are currently in the 11th and 12th grades and have expressed interest in pursuing scientific and technical careers. Lab scientists, engineers and other technical managers who are interested in serving as a mentor to high-achieving high school students and have a project, or any number of small projects that can be accomplished over the summer, are asked to contact Brita Hampton with a description of the work to be assigned. If you have questions email or call her at x7633. She needs ideas or proposals by May 1.

Tracking Thomas at Jefferson Lab
Little Thomas is still on his Spring Break. He'll return for more romps around the lab next week.


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.