Jefferson Lab Weekly Briefs April 22, 2015

Jefferson Lab Weekly Briefs
April 22, 2015

12 GeV Upgrade

The giant, concrete shield doors on the Hall C Super High Momentum Spectrometer (SHMS) have been outfitted with drive motors so that they may easily be opened and closed. Inside the shield house, the Heavy Gas Cerenkov (HGC) counter is now in position and connected to its data-acquisition electronics. Researchers from the University of Regina, who built the detector, obtained much of the funding for it through a grant from the Canadian government. The remainder of the detector was paid for by the 12 GeV Upgrade Project, as were the JLab-designed alignment, gas, and electronic systems.  

The SHMS Q1 magnet, which arrived in January, has been cooled to liquid-helium temperature and successfully tested to its full design field. Connection of the HB magnet to its control, power, and cryogenic services is continuing on schedule. Cool-down testing is expected to begin soon, and power tests will follow.

The vendor of the final three SHMS magnets is making good progress. All coil winding has been completed, and only two of the 10 sub-coils remain to be impregnated with epoxy. The two sub-coils of the Dipole magnet have been glued together to form a cylindrical assembly, and the outer surface of this has been shaved down to make a nearly-perfect cylinder. The next step is to heat large aluminum rings and slip them over the coil so that when they cool and contract they will tightly squeeze the coil and hold the conductors in place.


Jefferson Lab Published Journal Articles, April 13-17
K. Park et al. (The CLAS Collaboration).  "Measurements of ep->epi+n at W= 1.6 - 2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS."  Phys. Rev. C 91, 045203 (2015).

D. Wang et al. (The PVDIS Collaboration).  "Measurement of parity-violating asymmetry in electron-deuteron inelastic scattering." Phys. Rev. C 91, 045506 (2015).

Tech notes, April 13-17
JLAB-TN-15-007.  Jennifer S. Williams, Patricia Hunt, and Brett Lewis.  "Empirical Nitrogen Dioxide Generation Using Spent Buffered Chemical Polish."

Records and Information Management Month Fact of the Week
If you or one of your employees will be leaving the lab (including retiring), there are some steps to follow regarding records. These records management requirements are posted on the lab website at:

Remember, lab records are lab property, and departing employees should not take records with them when they leave.

RIM Trivia Question of the Week
Another film trivia question:  Records are evidence of activities.  In this futuristic film starring Tom Cruise, three individuals with extraordinary skills predict crimes of violence before they happen, giving cause for the authorities to detain the individuals who will commit the crimes.  Name the film.   All responses must be received by Kim Edwards by noon on Monday, when a random drawing will take place of all correct answers. One person will win a Starbucks gift card! (Winners will be notified via email no later than 5 p.m. Monday.  Limit one gift card win per person.)

Last week's winner:  Lori Zuckerman won the Starbucks gift card in a random drawing of correct answers.  The answer to last week's trivia:  Spy Game

Center for Theoretical and Computational Physics

A new paper <arXiv:1504.03973> from the Adelaide-Jefferson Lab-Manitoba collaboration examines the interference γZ box corrections to parity-violating elastic electron-proton scattering in the light of the recent observation <arXiv:1304.7741> of quark-hadron duality in parity-violating deep-inelastic scattering from the deuteron at low Q2. Using the similarity of electromagnetic and γZ structure function moments and those extracted from leading twist parton distributions down to Q2≈1 GeV2, duality is found to constrain the γZ box correction to the proton's weak charge to be (5.4 ± 0.4) x 10-3 at the kinematics of the Q-weak experiment. Within the same model, estimates are also provided of the γZ corrections for future experiments, such as MOLLER at Jefferson Lab..

Facilities Management and Logistics

Lab-wide Cleanup Set for April 27-30
Jefferson Lab will hold a lab-wide spring cleanup April 27-30 (Monday – Thursday) in advance of a site visit on May 5 by members of the Commission to Review the Effectiveness of the National Energy Laboratories. The cleanup will involve all divisions and all employees. All managers are responsible for ensuring the participation of their individual staffs. The goal is to clean up individual work areas, as well as to remove scrap wood, cardboard, metals, trash and any excess items that may have piled up over time both indoors and out. See memo for details.

TED Building Entrance Closed While Brickwork is Sealed
The Technology and Engineering Development Building main entrance will be closed for approximately three days for cleaning and sealing the masonry brick walls at the exterior display case. A subcontractor will be cleaning the masonry brick with a pressure washer. To avoid over-spray on personnel, the TED Building entrance will be blocked during the work activities. Inside the TED Building, temporary signs will be placed for re-routing egress paths. The work is scheduled to start the week of April 20. Work activities are weather dependent and may shift later due to schedule impacts. Building Managers will be notified of exact dates. If you have any questions about this work, contact Rebecca Yasky at x7507 or Maynard Brown at x6162.

CEBAF Center Parking Lot Will Be Impacted During Utilities Infrastructure Upgrade Project
A section of the CEBAF Center parking lot adjacent to the east side of the F Wing (facing Hadron Drive) will be fenced off for the contractor's lay down area throughout the Utilities Infrastructure Modernization (UIM) Computer Center Cooling and Power Upgrade project.  The contractor will delineate the area with fencing; 18 parking spaces will be impacted.

A temporary chiller and trailer will be staged inside the fence.  The upgrade work will be occurring in the CEBAF Center mechanical room and data center.  The work is scheduled to start the week of May 4 and continue until March 31, 2016.

Questions about this project may be directed to Michele Solaroli, Facilities Management, at x7751


The Machine Shop is presently manufacturing or continuing to manufacture:

For SRF - 5 Resonator Sample Support assemblies
- Niobium BNL 56MHz HOM Damper Production Filter Assemble EBW Tooling
- Niobium 56 MHz Tuna Half Can, Bushing, Loop Transition, and Bent Tube
- Half Wave Coaxial Cavity, Cavity Shell pressing dies and Cut Fixture
For Hall C, a 12 Gev Beam line Stand, Shielding Support, and a stand for the raster magnet shielding
For Hall B, a 12 Gev Detector SVT R4 Cold Plate

And various small machining jobs for lab customers.

Environment, Safety, Health and Quality

Safe Digging at Home and at JLab
Spring time in Hampton Roads is a very busy time with planting, installing decks and fences, repairing lawn irrigation systems, and many other outside work activities at your home. One thing that all these tasks may have in common is that they involve outdoor digging/excavation.
As we all know, there is a good chance that you have buried utilities (electric, natural gas, cable TV, telephone …) in your yard. So before you begin any outdoor digging/excavation project at home, first call Miss Utility of Virginia at 811 (or 1-800-552-7001) or visit them at

Home owners should contact Miss Utility at least three working days before you plan to dig/excavate. Remember, even if your project is small, it is always best to call. It’s a free service and it is for your safety.

At Jefferson Lab we have a similar process for digging/excavation and blind penetration operations. Refer to and look under ‘Fillable Forms’ for more information on these two activities.

Two Hurricane Preparedness Sales Tax Holidays Planned for 2015
Legislation enacted by the 2015 General Assembly (SB 1319) combines three existing sales tax holidays into one in August effective July 1, 2015. This includes the hurricane and emergency preparedness sales tax holiday. However, the Virginia Department of Taxation has confirmed this year’s hurricane and emergency preparedness sales tax holiday for May 25-31 and Aug. 7-9. In subsequent years, there will be one hurricane and emergency preparedness sales tax holiday in August.

VDEM is updating sales tax holiday outreach materials to reflect the upcoming campaign and will post them to as soon as possible. 
Information from the Department of Taxation regarding this event is posted at:


Registration is Open for the May 13, JAG 30th Anniversary Run-A-Round
Check your running shoes and sign up now for your competition bib. The 30th annual Jefferson Lab Run-A-Round event will be held Wednesday, May 13, 3-6 p.m. JLab staff, users, students, full-time contractors and immediate family members are invited to participate. Staff and users that participate in the run or that volunteer can receive a free 2015 JLab T-shirt. All runners and walkers must register online to be eligible for prizes. Online registration is open through 5 p.m. on Tuesday, May 12. Register yourself and your family members who are planning to participate today at the link on the JAG website.
The JAG committee has added a new race category: Master's (for ages 46 and over).

Register online at:

Thanks to Participants of April 14 Blood Drive
Jefferson Lab donors made a significant contribution to the American Red Cross with April's Blood Drive!  A total of 34 productive pints were collected, a little short of our goal of 38. 

The JLab Occupational Medicine staff and the Red Cross, extend a sincere thank you to everyone who participated with this blood drive.  The next JLab blood drive will be in August.

TIAA-CREF Individual Counseling Available by Appointment
TIAA-CREF will be offering additional Individual Counseling Sessions in the coming months. The consultant will be available to discuss how to help you achieve your financial goals by investing in financial solutions such as mutual funds, brokerage, life insurance and annuities. Sessions will be offered on June 17, July 22 and 23, August 13, Sept. 17, Oct. 8, Nov. 19 and Dec. 16 in Support Service Center room 41a. A few appointment times are still available for May 14. To schedule an appointment with a TIAA-CREF Individual Consultant to discuss your plan and options for managing your retirement savings, call TIAA-CREF at (800) 732-8353, Monday through Friday, 9:00 a.m. to 8:00 p.m. (ET).  For the full memo, visit:

Reminder: RadCon Has Moved to 1st Floor Library Area of ARC Building
The Jefferson Lab Radiation Control (RadCon) Operations Group, Electronics Group, Training Group, Analytical Lab and Dosimetry Group have moved to the ARC Library (first floor).

Jefferson Lab Calendar of Events
May 23: Take Our Daughters and Sons to Work Day
May 23: Retirement Reception for Noel Okay
May 3-8: International Particle Accelerator Conference (IPAC15)
May 13: JAG Run-A-Round
May 14-15: Final State Nucleons for Neutrino-Nucleus Interactions Workshop
May 25: Memorial Day holiday - Jefferson Lab closed
May 26-30: QCD Evolution 2015 Workshop

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.