Jefferson Lab Weekly Briefs
December 11, 2013

12 GeV Upgrade

In-tunnel testing of the 12 GeV cryomodule known as C100-8 has resumed. Installation and final alignment is complete for the beamlines in the main "racetrack" of the accelerator, including closing locations used for access to the beam switchyard, injector, Hall D and southeast stub. Final vacuum hookup and alignment of the beamlines to Halls A, B and C are nearly complete. Final alignment of the Hall D beamline has been completed upstream of the shield wall/door at the top of the ramp. The arc 1 dipoles have been operated with the new arc 1 box supply. The arc 2 box supply is almost ready to connect to the dipole magnets. Box supplies for arcs 3 through 6, LAM1C, and the Hall A beamline are on site and in various stages of installation and testing. Delivery of the 20 Amp trim power supplies has resumed. The final procurements for the stripline beam position monitor electronics are about to go out. Installation of the Personnel Safety System for Hall D continues. 


Jefferson Lab Published Articles, Dec. 2-6

  • Ian Balitsky and Giovanni Chirilli, "Rapidity evolution of Wilson lines at the next-to-leading order." Phys. Rev. D 88 111501 (2013).

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

Center for Theoretical and Computational Physics

A new paper explores the use of twisted boundary conditions in extracting the nucleon mass and the binding energy of two-baryon systems, such as the deuteron, from lattice QCD and lattice effective field theory calculations. By choosing clever boundary conditions, one can reduce finite volume contamination of the deuteron binding energy by a factor of 10-20 for moderate volumes. Using the experimentally determined phase shifts and mixing angles, the reported analysis determines the expected energies of the deuteron states over a range of lattice volumes for a selection of twisted boundary conditions and numerically confirms the analytical observations which are speculated to hold for arbitrary N-body systems.


The alignment group has been busy throughout the Jefferson Lab site. The initial alignment of the installed Hall B beamline components in the beam switchyard has been completed up to the shield wall. The final alignment of the Hall A beamline components, again in the BSY, is nearing completion. In Hall D, the Forward Drift Clamber located in the solenoid is undergoing initial alignment. Additionally in Hall B, the Pre-Shower Calorimeter detectors are being fiducialized relative to the forward carriage. In the group's magnetic measurement facility, the YB magnet refurbishment is being carried out.

Facilities Management & Logistics

Unplug Those Holiday Decorations
Everyone is reminded to turn off and unplug all electrical decorations when they depart work each day or by 6 p.m. In addition, all decorating materials must be resistant to fire, and only UL-approved lighting/electronics may be used.

JLab Calendar of Events

Dec. 14: JAG Children's Holiday Party
Dec. 16-17: Gamma-Z Workshop
Dec. 16-18: Hall A Collaboration Meeting
Dec. 23-Jan. 1: Holidays & Shutdown Days, Lab closed
Jan. 2: Tidewater Regional Fire Academy Graduation in CEBAF Center
Jan. 16-18: Exploring Hadron Structure with Tagged Structure Functions Workshop
Jan. 28: American Red Cross Blood Drive
Jan. 28-30: Accelerator Readiness Review Phase 2

Environment, Safety, Health and Quality

Junk Drawers and Nine-Volt Batteries
Just about every home has a drawer that holds a collection of all the little pieces of life that don't have another home. Often, uncapped batteries are also tossed in the drawer. This is a particularly dangerous situation in the case of nine-volt batteries. When the battery's top terminals are bridged with some metal - a paper clip, keys, etc. -  there is a flow of current through the connecting material. Resistance in the material can generate sufficient heat to cause flammable items in the drawer to catch fire.

The simple way to prevent this from happening is to keep all batteries out of the junk drawer. Another solution is to cover batter terminals: keep the original plastic cap over the terminals of nine-volt batteries, seal off the terminals temporarily with electrical tape, or place the batteries in an intact plastic bag. These simple steps can protect you, your family and your coworkers from battery-initiated fire.

Computing and Networking Infrastructure

CNI Maintenance Period Set for Tuesday, Dec. 17, 5-7 p.m.
The IT Division's CNI group is planning a systems and network maintenance period for Tuesday, Dec. 17, 5-7 p.m. During this time, there will be a short network outage while equipment failover is tested and a configuration upgrade is performed. There will also be a voicemail outage, and all Management and Information Systems applications will experience a short outage while system patches are installed. A Symantec Anti-Virus software upgrade will be pushed out to all managed systems; this update should be transparent, but a complete virus scan will be performed when installation is complete. Also, Firefox, Thunderbird and Adobe Flash player updates will be released to all Windows systems, and Windows and Linux patches will be released to all desktop systems. Plan on rebooting your desktop system later in the week or, at least, prior to your departure for the holiday break. As always, if you have any questions or concerns about these or other computing-related topics, contact the IT Division Helpdesk, x7155

Test of Public Address System Will Intermittently Impact Live Calls
Also during the CNI Maintenance Period on Tuesday, Dec. 17, the lab will test the public address capability of its Cisco IP phones. The test will commence at 5:30 p.m. and will be broken into two parts: a lab-wide test of the public address system, followed by building-specific tests in each of the following areas: ARC, SSC (Bldg. 28), CEBAF Center (Bldg. 12), EEL (Bldg. 90), Test Lab (Bldg. 58) and the TED (Bldg. 55). When the public address system is activated, all "in progress" phone calls will automatically be put on hold. Each set of tests should last 1-2 minutes and could include up to two separate voice announcements from the speaker on Cisco IP phones. As soon as an announcement is completed, you may access and resume any interrupted calls.


Due Today: One-Time Training Requirement for GERT/Radiation Workers
A new, short training document, Rad Area Posting Change (SAF001) has been posted by the Radiation Control group to notify everyone with current GERT and Radiation Worker training of the status and entry requirement changes on the accelerator site that are being made for 12 GeV commissioning. This document is a one-time training requirement that must be completed by COB today. You can access the training in the Environment, Safety and Health section of the Web-Based Training page.

Ends Friday: Open Enrollment for GSRA
The 401(k) Group Supplemental Retirement Annuity (GSRA) Open Enrollment for Calendar Year 2014 is offered through Dec. 13. All elections will be reflected in the Jan. 15 paycheck.

JAG Holiday Events - Toys for Tots, Party and Contest
Jefferson Lab is participating in the U.S. Marine Corps Reserve's annual Toys for Tots toy drive. Leave your donation of a new, unwrapped toy for a child aged 12 and under in a collection box by Friday, Dec. 13. The JAG Children's Holiday Party is scheduled for Saturday, Dec. 14, 10 a.m.-1 p.m. in the CEBAF Center lobby. All employees, contractors, users and their children are invited and encouraged to bring a donation for Toys for Tots. Finally, sign up for the Holiday Office Door/Cubicle Decorating Contest by Friday. You can find more details about all of these events on the JAG webpage.

Personal Dosimeter Changeout Set for Monday, Dec. 16
Jefferson Lab's semi-annual personal dosimeter changeout will take place mid-afternoon on Monday, Dec. 16. This includes the dosimeters of all lab staff, users and subcontractors. If you won't be using your dosimeter during the changeout period, place it in its assigned place in the dosimetry racks for the changeout. If you need to use your dosimeter during the changeout period on Dec. 16, you may exchange it that morning in the Radiation Control Dosimetry Office in Bldg. 52B, Room 4, 8 a.m.-1 p.m. If you have questions, contact Becky Mosbrucker, x7236.

Annual Holiday Bake Sale Set for Friday, Dec. 20
Quark Cafe staff invites the Jefferson Lab community to its annual Holiday Bake Sale on Friday, Dec. 20, 10:30 a.m.–1:30 p.m. The bake sale will be in the CEBAF Center lobby and will include a variety of breads, holiday cakes and pies by Gerry Fortin, owner of Lucille's Bakery in Richmond. Bakery items will be available in a range of prices.

Pressure Systems Awareness Training Offered
Pressure Systems Awareness Training, SAF130A, will be held Jan. 8 at 11 a.m. in CEBAF Center room F113.  Registration is available through the Learning Management System. Additionally, Job Task Analysis (JTA) questions regarding pressure systems and safety hazards have been revised. In order for updates to reflect in your Skill Requirements List, your supervisor must go into the JTA and update the record. The updated questions are: Does this position require the operation, repair or design of a pressure or vacuum system? (SAF130A Pressure Systems Awareness); and Does the work involve stored energy or movement hazards (e.g. compressed gasses, magnets, robotics)? (MED01 Medical Monitoring for Hazardous Work, SAF104 Lock Tag and Try).

GEN034 Annual Security Awareness for Employees & Subcontractors
Each year, all employees and subcontractors are required to complete Annual Security Awareness training, GEN034. The GEN034 module is currently being revised and will remain unavailable until Jan. 2. Due to the delayed access to this module, the expiration date for the current period has been extended to Jan. 31. Training and Performance appreciates your patience as they work to update the training material. If you have any questions about training, contact Brandye Rogers, x5959, or Bruce Ullman, x7170.

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.

Harry Fanning and Kevin Jordan correctly guessed the location for Dec. 4. 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.