Jefferson Lab Weekly Briefs
January 8, 2014

12 GeV Upgrade

All sectors of the PreShower Calorimeter for CLAS12 have been mounted on the forward carriage in Hall B. One sector has been connected to the new flash analog-to-digital converters (FADCs), discriminators and high voltage and is being read out. The first three sectors of the Forward Time-of-Flight1-a arrays have also been mounted onto the forward carriage. All of the Region 2 Drift Chambers have been shipped from the Old Dominion University group to Jefferson Lab, and the Region 1 Drift Chambers are complete and planned to be shipped from Idaho State University to Jefferson Lab starting this month. The sixth Region 3 Drift Chamber is now mounted on the stringing fixture at Jefferson Lab and is having guard and tension wires installed prior to the start of field- and then sense-wire stringing. This is the last Drift Chamber sector to be built. The first several production modules of the Silicon Vertex Tracker (SVT) barrel have been assembled and fully tested at Fermilab, with assembly expected to continue until the fall of 2014. The parts for the SVT support structure are now being acquired. The internal frame for the containment vessel for the High Threshold Cerenkov Counter (HTCC) has been assembled, and the carbon-fiber entry dish and related parts added. The first seven coated production mirror segments for the HTCC have arrived and have been tested. They will next be assembled into the first of 12 half-sectors for the HTCC mirror. The mirror refurbishment has also been started for the existing Low Threshold Cerenkov Counter. The practice coil for the Torus magnet is complete at Fermilab and has been test fit into its case; the success of this effort led to the decision to start coil production, which is now underway. Major parts for the Torus are starting to arrive and are expected to continue for another six months. The Torus cryostat factory is set up and being readied to receive the practice coil from Fermilab. The vendor for the Solenoid magnet is focusing on completing calculations for a final design review planned for late February/early March and has been asked to start acquiring the manufacturing tooling to wind the Solenoid coils.


Jefferson Lab Published Articles, Dec. 16 - Jan. 5

  • M. Dugger et al. (CLAS Collaboration), "Beam asymmetry Σ for π+ and π0 photoproduction on the proton for photon energies from 1.102 to 1.862 GeV." Phys. Rev. C 88 065203 (2013).
  • J. Pierce et. al., "Dynamically polarized target for the g2p and GEp experiments at Jefferson Lab." Nucl. Instr. Meth. A 738 54-60 (2014).

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

APS April Meeting Deadline Nears
Abstracts for the American Physical Society April Meeting 2014 are due Jan. 10. The meeting is scheduled for April 5-8 in Savannah, Ga. Details and more information can be found on the APS website.

Center for Theoretical and Computational Physics

The unpolarized transverse momentum dependent parton distributions (TMDs) and fragmentation functions have been extracted from HERMES and COMPASS measurements of semi-inclusive deep-inelastic scattering multiplicities for charged hadron production. A simple factorized functional form of the TMDs is adopted with a Gaussian dependence on the intrinsic transverse momentum. A comparison of the extracted TMDs with previous data from CERN and Jefferson Lab confirms the adequacy of this functional form.

JLab Calendar of Events

Jan. 13: Safety Shoe vendor onsite
Jan. 15-16: MEIC Review
Jan. 16-18: Exploring Hadron Structure with Tagged Structure Functions Workshop
Jan. 20: Martin Luther King, Jr. Day; Jefferson Lab closed
Jan. 28: American Red Cross Blood Drive
Jan. 28-30: Accelerator Readiness Review Phase 2
Feb. 1: Virginia Regional High School Science Bowl

Environment, Safety, Health and Quality

Resolving ES&H Concerns
To ensure your welfare and productivity, Jefferson Lab has several mechanisms for employees, or anyone who comes into contact with the lab, to report issues potentially affecting the safety of workers, visitors, lab neighbors or the environment without fear of retaliation or reprisal. ES&H Manual Chapter 2310 lists a variety of mechanisms for resolving and reporting ES&H concerns and for preventing similar concerns from occurring in the future.
Here is a list of the options you have for resolving an ES&H concern:

  • If possible, resolve the ES&H concern yourself.
  • If you are unable to resolve the concern yourself, refer the concern to your supervisor  and management chain using the mechanisms outlined here.
  • You may also consult your Safety Warden, Division Safety Officer, your representative to the Worker Safety Committee, or contact an ESH&Q staff member directly for any ES&H concerns you may have.
  • If you would like to remain anonymous, or if you feel that it is more appropriate, use Jefferson Lab’s Employee Concerns Program.
  • If one or more of the above steps have not resulted in resolution of the concern, or if you feel that it is more appropriate, you may also use the formal DOE Employee Concerns Management System hotline at 800-676-3267.
  • Or use this link to the form for the DOE's Differing Professional Opinion (DPO) process also found in DOE Order 442.2 or by calling or emailing the DOE DPO Manager, Scott Davis, at 301-903-9641.

The DOE DPO process ensures that all JSA employees and contractor employees have the right to report environment, safety, and health technical concerns that have not been resolved through routine work processes.

Once your concern has been addressed, communicate any lessons learned to your staff, co-workers, supervisors and your Division Lessons Learned Coordinator. ES&H Manual Chapter 2310 offers more information on concern resolution.


GEN034 Annual Security Awareness for Employees & Subcontractors
The GEN034 Annual Security Awareness training module is now available. Each year, all employees and subcontractors are required to complete GEN034. If you have not yet completed the training module for 2014, be sure to do so by Jan. 31. If you have any questions about this module or any other training, contact Brandye Rogers, x5959, or Bruce Ullman, x7170.

2014 Holiday Calendar Posted
The Jefferson Lab 2014 Holiday Calendar has been posted to the Human Resources website.

Red Cross Blood Drive Set for Jan. 28
The next American Red Cross Blood Drive is scheduled for Tuesday, Jan. 28, 10 a.m.-4 p.m. in CEBAF Center, Room F113. New and repeat donors are encouraged to attend. Appointments and walk-ins are welcome. To schedule an appointment, contact Johnie Banks, x7539. The linked page lists all eligibility requirements.

Procedures for Opening PDF Files from Docushare
If you use Jefferson Lab's document management system, Docushare, for opening PDF files in Firefox, you must complete the following steps in your browser prior to attempting to open a PDF file in Docushare to ensure the files open properly:

  • Firefox Browser-> Tools (or Options)-> Options-> Applications-> Portable Document Format (PDF)-> Use Adobe Acrobat(in Firefox).-> Save Settings

For additional Docushare help, email

JAG Dog Club Rings in New Year with Pet Photography Tips
How do you take a picture of your dog that looks great and captures him at his best? To kick off the 2014 Canine Good Citizen/Therapy Dog class, the JAG Dog Training Club will be offering a lunchtime pet photography talk on Tuesday, Jan. 28 at noon. Bring a bag lunch to the Science Education classrooms, Support Service Center Rooms 72 A and B, to hear Alan Gavalya's tips for capturing your dog's personality in a photo. After the talk, there will be a presentation on the upcoming dog training class. The new class will meet on Tuesday evenings at 7 p.m. in the SSC lobby, starting on Feb. 4. No dogs are welcome at this initial lunch time meeting, but come, sit and stay with the JAG Dog Club members! For more information, contact Joyce Miller, x7163, or Brian Kross, x7022.

Tracking Thomas at Jefferson Lab
Little Thomas is visiting all corners of the Jefferson Lab campus. If you can identify his location this week, email Kandice Carter with your guess. Guesses are accepted through Friday.

Samika Hawkins correctly guessed the location for Dec. 18. Honorable mentions go to Michael Haddox-Schatz, Jonathan Trexler, Silvia Niccolai and Elaine Zuchowicz. Check out Tracking Thomas on flickr for a better view of his last location and this week's new mystery photo.

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.