Jefferson Lab Weekly Briefs February 17, 2016

Jefferson Lab Weekly Briefs
February 17, 2016

12GeV Upgrade

In November 2015, the heating element for the current lead mass flow overheated the lexan-like cover around the Super High Momentum Spectrometer Q1 magnet leads in Hall C, causing a small fire. The thermometers of the lead mass flow heaters were cross-connected so that the thermostat controls were not properly matched to the correct heater. The top of the cryo can is congested with piping, valves and associated wiring, so tracing the lines visually is difficult. This is compounded when equipment is similar and not labelled or otherwise identifiable. The system initial setup was done in February 2015, and parties are not aware of any changes that were made to this setup since then. 

Statement of Lessons Learned:

  1. Although hard to accomplish, maintaining a clean and organized work space will aid in the workers’ ability to navigate to various hard to reach areas within congested work areas.
  2. Whenever possible, purchase systems as a single unit. This will eliminate the possibility of getting the wire connected improperly during the installation process.
  3. As per the fire extinguisher training, when you see or suspect a fire, pull the closest fire alarm in a timely manner, and the appropriately trained personnel will respond to your area.
  4. Whether temporary or permanent systems, design and fabrication need to conform to established engineering principles, including the identification and mitigation of hazards.
  5. Conformance with the lab procedures for fabrication and modification of electrical equipment that is not listed by a Nationally Recognized Testing Laboratory will ensure that a subject matter expert's review is completed, so that potential hazards can be identified and mitigated.


Jefferson Lab Published Journal Articles, Feb. 8-12

  • N.L. Hall, P.G. Blunden, W. Melnitchouk, A.W. Thomas, and R.D. Young. "Quark–hadron Duality Constraints on γZ Box Corrections to Parity-violating Elastic Scattering." Physics Letters B 753, 221.
  • D. C. Pace, M. J. Lanctot, G. L. Jackson, A. M. Sandorfi, S. P. Smith, and X. Wei. "Controlling Fusion Yield in Tokamaks with Spin Polarized Fuel, and Feasibility Studies on the DIII-D Tokamak." Journal of Fusion Energy J 35, No. 1: 54.

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

Publications Refresher Course Offered Feb. 23
The next Publications Training and Refresher course will be held on Tuesday, Feb. 23, at 9 a.m. in CEBAF Center room F224-225. A brief introduction to the Department of Energy's Public Access Plan and how it affects Jefferson Lab will be presented. In this session, authors will learn how to submit manuscripts to the Publications Review and Approval System, how to make recommended revisions to papers during the signature process, and how to add the relevant information once the paper is published. If you would like to attend, R.S.V.P. to Kim Edwards by Friday, Feb. 19.

Apply Now for the Graduate Fellowship Program at Jefferson Lab
JSA is now accepting applications for the JSA/JLab Graduate Fellowship Program for the 2016-2017 academic year. Each fellowship will provide the awardee's home institution with a $10,000 stipend. The awardee's home institution must agree to provide the remaining research assistant stipend from institutional or research funds. An additional $2,000 supplemental stipend is provided to the awardee's home institution for the graduate student. Conference travel support is also available for use during the fellowship period. The JSA/JLab Graduate Fellowship Program is funded by the JSA Initiatives Fund. Application materials are due by Feb. 29. Visit the website for an application form and application requirements. If you have any questions about the program, contact Elizabeth L. Lawson at

JSA Offers Sabbatical and Research Leave Support at Jefferson Lab
JSA is now accepting applications for the JSA/JLab Sabbatical and Research Leave Support Program for the 2016-2017 academic year, with support beginning as early as summer 2016. The program is funded by the JSA Initiatives Fund. Application materials for the program are due by March 31. Visit the website for an application form and proposal requirements. If you have any questions about the program, contact Elizabeth L. Lawson at

Center for Theoretical and Computational Physics

A new set of parton distribution functions (PDFs) from the CTEQ-Jefferson Lab collaboration (dubbed "CJ15") has been presented, which take advantage of developments in the theoretical treatment of nuclear corrections as well as new data. The analysis includes, for the first time, data on the free neutron structure function from the BONuS experiment at Jefferson Lab and new high-precision charged lepton and W-boson asymmetry data from Fermilab. These significantly reduce the uncertainty on the down-quark to up-quark PDF ratio at large parton momentum fractions x and provide new insights into the partonic structure of bound nucleons.


The Machine Shop is presently manufacturing or continuing to manufacture the following items. For Hall A, the Super BigBite Spectrometer conical vacuum chamber has been complete and manufacturing of all related shielding continues, a gear motor diffuser support assembly is being manufactured, and workers are estimating the cost to fabricate a personnel access target system platform. For Hall B, stainless steel parts for the dilution refrigerator for the HDice experiment are being manufactured, and modifications of the cryogenics helium vessel nozzles are being made to obtain the proper length. For Hall C, horizontal mirror box assemblies, viewer tubes and connectors are being made. Additionally, various small machining jobs are underway for lab customers.

Jefferson Lab Calendar of Events

Feb. 18: Colloquium and Public Lecture: Tunnel Visions by Micheal Riordan
Feb. 18-20: GlueX Collaboration meeting
Feb. 22: Golf League Season Kickoff meeting
Feb. 23-26: CLAS Collaboration meeting
March 6: Va. Regional Middle School Science Bowl
March 14-15: Hypernuclear Workshop
March 16-18: Future Trends in Nuclear Physics Computing Workshop
March 29-31: JLEIC Collaboration meeting

Environment, Health, Safety and Quality

Niels Bohr is credited with saying, "Prediction is very difficult, especially if it's about the future." This is especially true in the safety and health business, where we review work plans, processes and materials to mitigate hazards today that may have effects that will only be seen in the future.

For example, it is not easy to predict whether or not occupational disease will manifest 20 to 40 years in the future for a particular individual, depending on that individual's biological constitution and a varying exposure pattern. However, the epidemiological sciences can show us that a population exposed to certain hazards will most likely suffer a known negative outcome down the road. Since we can't control an individual's susceptibility factors, we need to eliminate or control an individual's exposures.

At Jefferson Lab, the goal is to take precautions to prevent unnecessary exposure by, for example, substituting a less hazardous material, properly using local exhaust ventilation, and wearing respiratory protection or the correct type of glove or hearing protection. Taking advantage of these precautions today can prevent problems that are likely to manifest down the road.

Computing and Networking Infrastructure

Group Directory Survey Planned
As part of an overall initiative to improve cybersecurity across the enterprise, the Department of Energy is currently rolling out a plan to deploy multi-factor authentication (MFA) to protect data and systems. MFA usually combines a pin or a password with some kind of hardware token or card, which makes it more difficult to compromise an account. Jefferson Lab already has MFA rolled out to protect certain types of sensitive data/systems, such as those on the business services network. In order to comply with the current DOE initiatives and align with best-business practices, the lab will be enhancing its MFA implementation using an approach that will minimize the impact on lab mission while reducing the risk.

As part of this process, IT personnel are doing some analysis to better understand our environment. One step we are taking is to better understand the directories housed on the group fileserver. If you are on Windows, you access this on the M:\ drive; on Linux/Mac, the equivalent is the /group directory. If you are the owner of a group directory, you will be receiving an email in the near future with a link to answer a few questions about the group and group directory. Please take the time to fill out this information, as IT Division personnel will be using that information to make some important upcoming decisions. As always, if you have any questions or concerns about this group directory audit, please contact the IT Division Helpdesk, or x7155.

Watchguard Spam Quarantine Report Guidance Offered
The IT Division Helpdesk has received some reports of non-spam email being caught by Jefferson Lab's spam filter. Remember that spam quarantine reports are emailed to each user every morning with a list of the current, possible spam listed. If you find an email in that list that is not spam, then you should click the "Not Spam" button to the right of the message. This will release the message to your email inbox and add an entry for that exact email address to the list of allowed messages. If you find that you are continuing to get certain types of messages blocked even after clicking the "Not Spam" button, you can go to the Jefferson Lab User Spam Quarantine Administration webpage and add the email address to your "Always Allow" filter. Once this is added and saved, you should stop seeing these messages quarantined. If this continues to be a problem, or if you find you are having other issues with the Spam Quarantine Report, submit a Computer Center Problem Report (CCPR) by sending an email to the IT Division Helpdesk,


Jefferson Lab Open House Set for April 30
Jefferson Lab's next biennial Open House has been set for April 30, 2016. To make it easier to share information about the event with interested relatives, friends, neighbors and colleagues, Public Affairs has posters, flyers and save-the-date business cards available for pick up at the brochure table in the CEBAF Center lobby. If you would like large quantities of any of these items or more information sent to professional organizations, civic clubs or other groups, contact Deb Magaldi, x5102,

Tunnel Visions - Colloquium and Public Lecture
In October 1993, the U.S. Congress terminated the Superconducting Super Collider, which, at over $10 billion, was the largest and costliest basic-science project ever attempted. According to Michael Riordan, UC Santa Cruz (retired), it was a disastrous loss for the nation's once-dominant high-energy physics community. Riordan is the author of The Hunting of the Quark and lead author of Tunnel Visions: The Rise and Fall of the Superconducting Super Collider. He’ll discuss how, in hindsight, a combination of fiscal austerity, continuing SSC cost overruns, intense Congressional scrutiny, lack of major foreign contributions, waning Presidential support, and the widespread public perception of mismanagement led to the project's demise nearly five years after it had begun, while there were alternative projects the U.S. high-energy physics community could have pursued. This colloquium will be held in the CEBAF Center auditorium at 11 a.m. on Thursday, Feb. 18.

Free Health Screenings Offered on March 23
Optima Health is offering free and confidential health screenings to employees, users and subcontractors at Jefferson Lab on Wednesday, March 23. The 10-minute screenings will take place in CEBAF Center, room F113. The tests that will be done include: blood pressure checks, cholesterol finger stick, and body mass index studies. The nurses providing the services will discuss the results, and no prep is needed for the screenings. An appointment is required for this screening, and a limited number of appointment times are available, 1-4 p.m. To schedule an appointment for this free service, call Occupational Medicine at x7539 or x5585. See the full memo.

2016 Annual T-Shirt Design Contest Is On
Put your creative talents to work and submit the winning design for the 31st Annual Jefferson Lab T-shirt Contest. Entries will be accepted through March 11. Each submission must include a front “pocket-size” and back design. "Jefferson Lab," "DOE," "JSA, LLC," and "2016" must be included in the design.  Resubmission of previous non-winning designs is welcome. To enter, submit your design, username, division and telephone (contact) number online. The lab community will vote on designs March 14-25. Th contest winner(s) will be revealed at the Jefferson Lab Run-A-Round on May 4. 

JLab Golf League Forming for 2016 Season
The Jefferson Lab Golf League is open to all current staff, retirees, users, and their spouses. All levels of play are welcomed. A 2016 season organizational meeting will be held on Monday, Feb. 22, in CEBAF Center room F113, noon-1 p.m. No food will be served at the meeting, but attendees are welcome to bring their lunch or purchase something from the cafeteria. See more information about the league and sign up on We Hear That.

Ending Soon: Benefits Open Enrollment for All Regular and Term Employees
The 2016 Benefits Online Open Enrollment Period for Jefferson Lab will be offered through Tuesday, Feb. 23. This is your opportunity to review and, if necessary, modify your benefits options. See detailed information and optional enrollment system training in the full, all-staff memo linked above.

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.