Latest Weekly Briefs

Wed, 2017-03-22 17:21

Jefferson Lab Weekly Briefs
March 22, 2017

12 GeV Upgrade

A setback was encountered at the vendor in transferring the load of the Hall B Solenoid magnet cold mass to its vacuum cryostat. The cold mass is suspended from the vacuum cryostat via eight support links, which are joined to the cryostat via stainless-steel pockets that are welded to the cryostat. The part of the link that penetrates the vacuum shell, and was to have been machined from a single piece of Inconel, was found to be made from two pieces welded together, which could not support the required load. A new set of links is being manufactured, all original links have been removed, and the cryostat shell has been rolled back from its position over the cold mass in preparation for installation of new links. The remaining sections of the radiation shield have been prepared with multi-layer insulation. Planning is complete for shipping the Solenoid to Jefferson Lab, with the shipping cradle together with its isolation springs having been delivered to the shipping contractor.

Physics

One Week Left to Apply 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

    A new study examines the two-photon exchange corrections to elastic electron-proton scattering within a dispersive approach, including contributions from nucleon and Δ intermediate states. The dispersive analysis avoids off-shell uncertainties inherent in traditional approaches based on direct evaluation of loop diagrams, and guarantees the correct unitary behavior in the high energy limit. The results are compared with recent measurements of e+p to e-p cross section ratios from the CLAS, VEPP-3 and OLYMPUS experiments, as well as with polarization transfer observables.

    Facilities Management and Logistics

    Tracking Tags Offered by Property Management Office
    The Property Management Office has a limited number of tracking tags available for use in keeping track of tagged property items that exceed $5,000 in value. These tags offer an easier way to determine the exact location of high-value and portable tagged property that may be moved often during use, such as oscilloscopes, multimeters and function generators. The tags are small, about the size of a walnut; they don't interfere with sensitive equipment; and they are available free of charge to your department. The tags update a property item's location via wifi automatically as it is moved. However, they may not be used in Radiologically Controlled Areas during beam operations, and the battery must be changed every five years (a reminder will be sent by the Property Management Office to all tag owners to change batteries). If you are interested in obtaining tags for your equipment, contact Christian Whalen at x7025 or Danielle Tarver at x5899.

    Jefferson Lab Calendar of Events

    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

    Environment, Safety, Health and Quality

    Sealed Sources
    The Radiation Control Department has a number of radioactive sealed sources (for temporary use) available for check out by staff members/users/students. A selection of commonly used sources are stored in the KeyWatcher box, a locked electronic cabinet system located in the Experimental Equipment Lab, Bldg. 90. To check out a source, you must be a qualified Radiation Worker, sign a Sealed Source User’s Agreement, and have a dosimeter. For details on checking out a source, review the sealed source checkout information on our webpage. If the type and quantity of radionuclide you require is not available, you can order a new source via the purchase requisition system. For information regarding sealed sources, contact Adam Hartberger at x7463 or adamh@jlab.org.

    Announcements

    JSA Receives 2017 EPEAT Purchaser Award
    It’s not easy being green, but JSA managed to do just that by selecting electronics that meet both IT and sustainability goals. JSA’s efforts at Jefferson Lab in 2016 were rewarded on March 13 at a ceremony in Arlington, in which JSA was presented with a 2017 EPEAT Purchaser Award. Read more about the award at the link.

    Vote for Your Favorite 2017 Jefferson Lab T-Shirt Design
    Vote for your favorite submission in the 2017 Jefferson Lab Annual T-Shirt Contest. There are 11 different designs to choose from this year. Voting will remain open until April 7. The winning design will be unveiled at the lab's annual Run-A-Round on May 17.

    Red Cross Blood Drive at Jefferson Lab Set For April 11
    An American Red Cross Blood Drive will take place at Jefferson Lab on Tuesday, April 11, 2017, 10 a.m.-4 p.m. in CEBAF Center, Room F113. New and repeat donors are encouraged to attend. Walk-ins are welcome. All participation is appreciated. For information on scheduling an appointment and the new Rapid Pass system that can save time at the donation site, see the full memo.

    Food Services Contract Update: Transition Notes
    The Jefferson Lab food services subcontract is two weeks into transition and two weeks remain before Elite assumes the work on April 3. Thus far, the process is going well. Elite interviewed the incumbent food services team, and several of the Eurest staff have accepted offers from Elite. The current Café Manager, Gaye Davenport, has plans to stay with the Eurest organization, and Patty Barry is pursuing a professional growth opportunity in Williamsburg. Also, the lab will soon be welcoming Vincent Savage from Elite, who, as Food Service Director and Manager, brings 25 years of food service experience, including nutrition services, menu planning and food service management for a variety of clients. Stay tuned next week for new ideas that Elite will be bringing to food service at Jefferson Lab.

    New 2017 Dates Offered for TIAA-CREF Individual Counseling Sessions
    TIAA-CREF is offering Individual Counseling Sessions, where you can discuss your personal financial situation with a TIAA-CREF financial consultant on a confidential basis. The consultant will be available at Jefferson Lab for multiple dates in Support Service Center room 22i to discuss how to help you achieve your financial goals by investing in financial solutions, such as mutual funds, brokerage, life insurance and annuities. To schedule an appointment, call TIAA-CREF at (800) 732-8353, Monday through Friday, 9 a.m.–8 p.m. (ET).

    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 property@jlab.org.

    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.