Jefferson Lab Weekly Briefs February 24, 2016

Jefferson Lab Weekly Briefs
February 24, 2016

12 GeV Upgrade

The design of the downstream support structure for the Central Time of Flight (CTOF) detector for CLAS12, as well as that of the installation arm, is now underway. The light fiber bundle to distribute monitoring laser light to the CTOF slats is on order, and the transport crates to move the slats to Hall B have been received. Timing measurements of the assembled CTOF slats have been used to determine the best discriminator settings for timing resolution. Refurbishment of the last of the six sectors of the Low Threshold Cerenkov Counter (LTCC) is complete, with the windows attached and pressure and leak tests passed. Installation of five of the six LTCC sectors has been done, with the sixth sector staged for installation. Installation of the Forward TOF panel 2 sectors is planned for early March, which will complete the Forward Carriage part of CLAS12. The first article is expected to arrive soon for the remaining fast electronic modules, the crate trigger processors, needed to complete the data acquisition and triggering systems for Hall B.


Apply Now for the Graduate Fellowship Program at Jefferson Lab
JSA is now accepting applications for the JSA/JLab Graduate Fellowship Program for the 2016-2017 academic year. Each fellowship will provide the awardee's home institution with a $10,000 stipend. The awardee's home institution must agree to provide the remaining research assistant stipend from institutional or research funds. An additional $2,000 supplemental stipend is provided to the awardee's home institution for the graduate student. Conference travel support is also available for use during the fellowship period. The JSA/JLab Graduate Fellowship Program is funded by the JSA Initiatives Fund. Application materials are due by Feb. 29. Visit the website for an application form and application requirements. If you have any questions about the program, contact Elizabeth L. Lawson at

JSA Offers Sabbatical and Research Leave Support at Jefferson Lab
JSA is now accepting applications for the JSA/JLab Sabbatical and Research Leave Support Program for the 2016-2017 academic year, with support beginning as early as summer 2016. The program is funded by the JSA Initiatives Fund. Application materials for the program are due by March 31. Visit the website for an application form and proposal requirements. If you have any questions about the program, contact Elizabeth L. Lawson at

Center for Theoretical and Computational Physics

The first calculation of strongly coupled-channel meson-meson scattering, with channels πη, KK and πη', is presented using a first-principles approach to QCD. The energy dependence of the S-matrix is determined from the discrete spectrum of eigenstates in three volumes extracted from lattice QCD correlation functions, with the S-wave featuring a prominent cusp-like structure in πηπη close to KK threshold coupled with a rapid turn on of amplitudes leading to the KK final-state. This behavior is traced to an a0(980)-like resonance, strongly coupled to both πη and KK, which is identified with a pole in the complex energy plane, appearing on only a single unphysical Riemann sheet.

Jefferson Lab Calendar of Events

Feb. 23-26: CLAS Collaboration meeting
March 6: Va. Regional Middle School Science Bowl
March 14-15: Hypernuclear Workshop
March 16-18: Future Trends in Nuclear Physics Computing Workshop
March 29-31: JLEIC Collaboration meeting

Environment, Health, Safety and Quality

Preparation for Adverse Weather
The National Safety Council (NSC) has provided a handy list of items to have on hand in case of severe weather:

  • Keep an emergency kit in your car and at least three days of food and water at home, as well as any medications;
  • Be sure to store all important documents – birth certificates, insurance policies, etc. – in a fire-proof safe or safety deposit box;
  • Have at least one family member knowledgeable in first aid and CPR;
  • Know how to shut off your home or apartment's utilities; and
  • Keep a battery-powered or hand-crank radio.

A little preparation now may save you from regrets later.


Microsoft Training Opportunity Offered
Training is gauging interest in hosting a Microsost Excel, and/or PowerPoint course in May or early June of 2016. If you are interested in one of these offerings, email Descriptions of the courses are available at the following links: Power Level 1, Power Level 2, Excel Intermediate, Excel Advanced.

Stockroom and Property Updates
If you’re looking to purchase items, be sure to check the Freestock/Re-utilization webpage to see if the lab already has your item in stock. Lab personnel are able to browse the pictures and click on what they want to generate an email work-order, so the items can be delivered. The Stockroom is also now carrying common sizes of batteries again (back by popular demand!).

The Property Office is processing surplus property to make it available to public schools and institutions for donation. To start the donation process for your unused items, contact Christian Whalen at Also, you can excess any items that you no longer need (whether the item is tagged or untagged) via the Property webpage.

Jefferson Lab Open House Set for April 30
Jefferson Lab's next biennial Open House has been set for April 30, 2016. To make it easier to share information about the event with interested relatives, friends, neighbors and colleagues, Public Affairs has posters, flyers and save-the-date business cards available for pick up at the brochure table in the CEBAF Center lobby. If you would like large quantities of any of these items or more information sent to professional organizations, civic clubs or other groups, contact Deb Magaldi, x5102,

2016 Annual T-Shirt Design Contest Is On
Put your creative talents to work and submit the winning design for the 31st Annual Jefferson Lab T-shirt Contest. Entries will be accepted through March 11. Each submission must include a front “pocket-size” and back design. "Jefferson Lab," "DOE," "JSA, LLC," and "2016" must be included in the design.  Resubmission of previous non-winning designs is welcome. To enter, submit your design, username, division and telephone (contact) number online. The lab community will vote on designs March 14-25. The contest winner(s) will be revealed at the Jefferson Lab Run-A-Round on May 4.

Free Health Screenings Offered on March 23
Optima Health is offering free and confidential health screenings to employees, users and subcontractors at Jefferson Lab on Wednesday, March 23. The 10-minute screenings will take place in CEBAF Center, room F113. The tests that will be done include: blood pressure checks, cholesterol finger stick, and body mass index studies. The nurses providing the services will discuss the results, and no prep is needed for the screenings. An appointment is required for this screening, and a limited number of appointment times are available, 1-4 p.m. To schedule an appointment for this free service, call Occupational Medicine at x7539 or x5585. See the full memo.

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.