Jefferson Lab Weekly Briefs March 15, 2017

Jefferson Lab Weekly Briefs
March 15, 2017

12 GeV Upgrade

With all equipment installed for the 12 GeV Upgrade of Hall C, the hall was swept and locked. The Counting Room was staffed, and the accelerator started delivering electrons to the hall on March 8. Once the beam was measured and tuned, a thin carbon target was put in position in the scattering chamber, and checkout of the new Super High Momentum Spectrometer began. Everything worked as planned! The five superconducting magnets in the spectrometer were turned on and signals from the detectors showed that high-energy particles were passing through them. Researchers collected and quickly analyzed the data and began to optimize the magnet polarities and currents, detector high voltages, trigger timing and data-acquisition settings. The results of the data analysis, including beam properties, was compiled as a demonstration of the Key Performance Parameter, a critical milestone indicating that the Hall C portion of the 12 GeV Upgrade Project has achieved its performance goals. Concurrence that this milestone has been met was received from the DOE Federal Program Manager and Federal Project Director today. The Hall C staff and users now look forward to using this shiny new tool to study some exciting physics.


Hall A
Hall A continued taking data on the argon spectral function experiment, which is now roughly half completed.

Hall D
The GlueX experiment has taken data for about 40 days this spring, which is about 22 percent of the time approved by the Program Advisory Committee for the first stage of the experiment. During this run, the Hall D equipment has been working well, close to the initial specifications. A substantial progress in speeding up the front-end electronics and data acquisition system has been achieved since spring 2016. The experiment is able to run at a slightly higher luminosity than initially planned. Several studies of possible systematic uncertainties have been performed, including a half-day of running at a low luminosity in order to study the rate-driven effects. The GlueX collaboration is planning to finish the necessary calibrations and start the analysis of the full data set by mid-May.

Jefferson Lab Published Journal Articles, March 5-11

  • A.V. Anisovich, V. Burkert, J. Hartmann, E. Klempt, V.A. Nikonov, E. Pasyuk, A.V. Sarantsev, S. Strauch, U. Thoma. "Evidence for Delta(2200)7/2^- from photoproduction and consequence for chiral-symmetry restoration at high mass." Phys. Lett. B 766, 35.
  • M. Boglione, J. Collins, L. Gamberg, J.O. Gonzalez-Hernandez, T.C. Rogers, N. Sato. "Kinematics of current region fragmentation in semi-inclusive deeply inelastic scattering." Phys. Lett. B 766, 245.
  • J.A. Magee, A. Narayan, D. Jones, R. Beminiwattha, J.C. Cornejo, M.M. Dalton, W. Deconinck, D. Dutta, D. Gaskell, J.W. Martin, K.D. Paschke, V. Tvaskis, A. Asaturyan, J. Benesch, G. Cates, B.S. Cavness, L. .A. Dillon-Townes, G. Hays, J. Hoskins, E. Ihloff, R. Jones et al. "A novel comparison of Moller and Compton electron-beam polarimeters." Phys. Lett. B 766, 339.
  • Ling-Yun Dai, M. R. Pennington. "Pascalutsa-Vanderhaeghen light-by-light sum rule from photon-photon collisions." Phys. Rev. D 95, 056007.
  • Pashupati Dhakal, Gianluigi Ciovati, Ganapati Rao Myneni. "Role of Thermal Resistance on the Performance of Superconducting Radio Frequency Cavities." Phys. Rev. Accel. Beams 20, 032003.
  • I. Bedlinskiy et al. "Exclusive η electroproduction at W>2 GeV with CLAS and transversity generalized parton distributions." Phys. Rev. C 95, 035202.

Get Up-To-Date on Professional Publications at Jefferson Lab on March 23
If you are new to the lab or new to writing journal articles and conference proceedings papers, mark your calendar to attend the Publications Training and Refresher Course on Thursday, March 23, at 3 p.m. in CEBAF Center room F224-225. This monthly course typically lasts less than 45 minutes and provides:

  • Important facts about the DOE Public Access Plan and how it affects Jefferson Lab;
  • An overview of policies and procedures;
  • A live demonstration of the Jefferson Lab Publications System; and
  • Answers to all of your publications questions.

If you plan to attend, R.S.V.P. to by Wednesday, March 22nd.

Apply Now for 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 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 laboratory's programs. Application materials are due by March 31. More information and applications requirements can be found online.

    Center for Theoretical and Computational Physics

    Feasibility studies for transverse single spin asymmetries (SSAs) in lepton-pair and quarkonium production have been made in a new analysis for the proposed experiment "AFTER@LHC" (A Fixed Target Experiment at the LHC). Depending on the process, measurements of the transverse SSAs can be interpreted in terms of transverse momentum dependent (TMD) factorization or collinear factorization at twist-3. Combined with TMD measurements in semi-inclusive deep-inelastic scattering at Jefferson Lab, these will provide new insights into hadron structure and the proton spin puzzle.


    The Mechanical Engineering Group completed the final set of drawings on the "FRIB Cryomodule Engineering and Design Finalization" work package. This represents the end of two years of work involving the Beta 0.041 and 0.29 modules, where the group took conceptual-design models from the Facility for Rare Isotope Beams as a starting point and developed them into complete engineering packages ready for cryomodule fabrication. Last week, the 0.041 cryomodule was placed and aligned in the FRIB tunnel. The 0.29 cryomodule/coldmass assembly is proceeding, and FRIB is looking forward to early beam commissioning of these cryomodules starting in 2018.

    Environment, Safety, Health and Quality

    Year-Round Awareness Needed for Tornado Preparedness
    Tornadoes can occur year round in eastern Virginia; they can develop in association with severe weather fronts, seasonal temperature swings, and even in conjunction with hurricanes, and can strike with little warning. Therefore, it is critical to maintain a high level of tornado preparedness. Everyone at Jefferson Lab should take time – at least annually – to review tornado awareness and response actions. A new poster highlights the most critical aspects of tornado preparedness. For more information, see the poster or the full memo.

    NWS Will Send Tornado Warning Test to Weather Radios at 9:45 a.m. on March 21
    At approximately 9:45 a.m. on Tuesday, March 21, the National Weather Service will send a test tornado warning over NOAA Weather Radios. This test signal will sound a tone alert, show a test message or flash to indicate a message, simulating what people would hear or see during an actual tornado warning. Local radio stations, TV stations and cable outlets will also broadcast the test message via the Emergency Alert System.

    Computing and Networking Infrastructure

    IT Maintenance Day Set for Tuesday, March 21, 5-10 p.m.
    The IT Division is planning a maintenance period for 5-10 p.m. on Tuesday, March 21. During this time, there will be a couple of short network outages while the central firewall is upgraded. During these outages, access to central services, such as file servers, will be interrupted. In addition, IT Division staff will be upgrading the external DNS server, the scientific computing name server, the webmail server, and the central scratch file server. These systems should be offline for about 15 minutes each while new servers are put in place. All services will be available by 7 p.m. Core Computer User Environment software updates will also be released to all Windows systems for Firefox, Thunderbird and other centrally managed software packages. Finally, Windows and Linux patches will be released to all CUE-managed desktops and servers, and there may be short outages over night while these servers are rebooted to finalize patch installation. Due to these updates and patches, plan on rebooting your Windows or Linux desktop no later than Friday, March 24, to finalize installation. If you have any questions or concerns about this maintenance period, contact the IT Division Helpdesk at or x7155.


    Food Services Contractor: More About Elite
    Elite Management Group is taking over as subcontractor for all Jefferson Lab food services starting on April 3, which includes café, catering and vending. Led by Zeel Desai and Ritesh Patel, Elite is a small business that prides itself on using new and innovative approaches for managing food service operations. According to Elite CEO, Zeel Desai, the management team at Elite has more than 45 years of experience in menu formation, implementation and customer service, and the company strives to serve not only good food but to provide service to all of its clients in every industry. Elite also prioritizes purchasing locally and from small business, such as buying fresh, seasonal produce that is grown nearby, whenever possible.

    ODU Physics Department Open House Set for March 18
    The Old Dominion University Physics Department will hold an open house on Saturday, March 18. The event will include lab tours, an exhibit of meteorites, planetarium shows, and a variety of hands-on activities and live demonstrations. The event is free and open to all ages. R.S.V.P.s are not required, but are appreciated. For more information, the R.S.V.P. utility, parking garage locations and a campus map, visit

    Last Chance to Submit Your Design Ideas for the 2017 JLab T-shirt Contest!
    The Jefferson Lab Activities Group is seeking entries for the annual T-shirt design contest. Your idea could become the winning design for Jefferson Lab's 2017 T-shirt! New ideas and previously submitted designs are welcome. The winning design will be unveiled at the lab's annual Run-A-Round event, scheduled for May 17. Submit your design online via the JAG webpage by close of business on Friday, March 17. Design requirements and more information may be found in the memo.

    Reminder: Annual Property Training & Validation Due March 31
    Jefferson Lab’s annual Property Custodian Training and Property Validation for 2017 was launched on Feb. 1 and continues through Friday, March 31. It is important for everyone to complete the training and validation during this period to allow Property Management to conduct the sample inventory required under our Department of Energy contract. See the full memo for links to the training and validation. If you have property or property validation process questions or concerns, contact the Property office at x7348 or

    Jefferson Lab Calendar of Events

    March 15-17: 3D Nucleon Tomography Workshop
    March 17: Workshop on Science at LERF
    March 20: Safety Shoe Truck on-site
    March 28-31: CLAS Collaboration meeting
    April 3-5: JLEIC Collaboration Meeting Spring 2017
    April 11: American Red Cross Blood Drive
    April 20: JSA's 2017 Small Business Outreach Fair

    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: the Communications Office or contact Kandice Carter at x7263.