Jefferson Lab Weekly Briefs February 1, 2017

Jefferson Lab Weekly Briefs
February 1, 2017

12 GeV Upgrade

The Central Time of Flight (CTOF) detector was installed on a temporary stand in Hall B for the upcoming first beam run for CLAS12. The stand reproduces the points on the Solenoid cryostat to which the CTOF must attach in its final configuration following magnet arrival and commissioning. The CTOF was subsequently cabled, brought to operating voltage and checked for light leaks. The High Threshold Cherenkov Counter (HTCC) was moved from its construction area in the TEDF Building to Hall B and placed on the beamline. The tungsten Moeller shield cone was then added, and the HTCC was rolled into place and hooked up to signal and high-voltage cables, after which circulation of the carbon dioxide operating gas was started. The Silicon Vertex Tracker was then brought to Hall B from the Experimental Equipment Lab cleanroom. After some adjustment, it was rolled into its space inside the CTOF, which in turn had been rolled downstream close to the HTCC. The CTOF was stopped just short of what will be its final operating position in the future in order to accommodate a temporary target for the first beam run. This target is a carbon fiber that is mounted onto a beam harp and placed just at the entrance to the HTCC gas volume. The upstream and downstream sections of beamline were added and pumped out. Finally, some lead bricks were placed at the spot on the existing tagger magnet where the beamline exits to act as extra shielding for the upcoming first beam-tuning exercises.


Hall A
Hall A is celebrating the timely, successful completion of the Super BigBite Spectrometer (SBS) project. This DOE capital equipment project has successfully constructed 40 planes of large Gas Electron Multiplier (GEM) tracking detectors, a dipole magnet and associated moveable support and beamline systems, and a novel scintillator-based coordinate detector. Five approved experiments will use this new spectrometer, which will also involve a new hadron calorimeter, electron calorimeter and state-of-the-art polarized helium-3 target. Hall A received additional good news this week with the announcement that Critical Decision-0 was awarded (although paused for funding) for the MOLLER experiment.

Publications Training Offered
If you’re new to the lab or are writing your first journal article or proceedings paper, the next Publications Training and Refresher course is for you! This 45-60 minute course will be held on Friday, Feb. 24, at 10:00 a.m. in CEBAF Center room F224-225. After this session, you will be prepared to:

  • Submit manuscripts to the Publications Review and Approval System;
  • Make recommended revisions to papers during the signature process;
  • Add the relevant information once the paper is published; and
  • Input the final, peer-reviewed accepted manuscript into our system.

These steps are required for Jefferson Lab's compliance to the Department of Energy's Public Access Plan. If you plan to attend, let Kim Edwards know by emailing no later than Thursday, Feb. 23. 

Nominations Are Being Accepted for the 2016 JSA Thesis Prize
The Users Group Board of Directors will award the 2016 JSA Thesis Prize for the best Jefferson Lab-related thesis. Theses completed during the calendar year 2016 are eligible, as well as theses completed during the last quarter of 2015 (if they haven't been submitted before). Nomination deadline is Feb. 24. Details and nomination requirements are available online.

JSA/JLab Graduate Fellowship Program Now Taking Applications
The JSA/JLab Graduate Fellowship Program contributes to addressing the nation's commitment to grow our future science leaders and researchers by providing the environment and financial resources for graduate students to work alongside Jefferson Lab researchers. Application materials are due by March 10. More information and application requirements can be found online.

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

    New work from the Theory Center presents a nonperturbative relation between the finite-volume spectrum of coupled two- and three-particle systems of identical scalar bosons and the infinite-volume S-matrix for such theories. This is a necessary formal development that will allow future lattice QCD studies of resonances that couple to two- and three-particle states. One prominent example of the latter is the Roper, which decays approximately 25-45 percent of the time to N + π + π.

    Facilities Management and Logistics

    Jefferson Lab Entrance at Rattley Road Closed for Construction on Saturday, Feb. 4
    On Saturday, Feb. 4, the Jefferson Lab entrance at Rattley Road will be closed for installation of sewer piping under the road. During this period, the Lawrence Drive entrance at Hogan Drive will be open. Incoming traffic may only access Jefferson Lab via Lawrence Drive. Commuters may access Lawrence Drive via Hogan Drive or Jefferson Avenue. Traffic exiting the lab will need to leave through the Lawrence /Jefferson Ave. exit. See the map for detour routes and open entrance and exit routes.

    If you have questions about this road closure, contact Bob Sperlazza at x6241 or

    Environment, Safety, Health and Quality

    Fire Protection Is Everyone's Responsibility
    Jefferson Lab maintains a variety of fire protection and suppression systems to minimize loss from fire and related hazards consistent with what is considered private industry’s “highly protected risk” status. The fire protection program outlined within ES&H Manual Chapter 6900 Fire Protection Program provides the procedures used to incorporate fire safety into facility planning, operations, maintenance activities and work processes. The objectives of our fire protection program are:

    • Minimize the likelihood of occurrence of a fire-related event;
    • Minimize the consequence of a fire-related event that could affect the public, workers, environment, property and missions; and
    • Provide a level of safety protection consistent with “highly protected risk” status.

    The Fire Protection program applies to everyone at Jefferson Lab, and you can find out more about the program by clicking the link above.


    Tornado Warning Siren Test Set for Friday, Feb. 3
    Jefferson Lab's tornado warning siren will undergo its monthly operational test at 10:30 a.m. on Friday, Feb. 3. Don't respond to the siren; this is a test of the siren system and not a personnel response exercise. Individuals planning to be in the Central Materials Storage Area (where the siren is located) while the test is taking place must have with them and wear two layers of hearing protection.

    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

    People in the News

    Jefferson Lab's Chief Technology Officer, Drew Weisenberger, was in the news last week at the University of Regina for work involving PhytoPET. Read all about it in the Regina Leader-Post.

    Jefferson Lab Calendar of Events

    Feb. 4: Va. Regional High School Science Bowl
    Feb. 16-18: GlueX Collaboration Meeting
    Feb. 20: Safety Shoe Truck on-site
    Feb. 24-25: Q-Weak Collaboration Meeting
    March 4: Va. Regional Middle School Science Bowl
    March 15-17: 3D Nucleon Tomography Workshop
    March 17: Workshop on Science at LERF
    March 28-31: CLAS Collaboration meeting

    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.