Jefferson Lab Weekly Briefs October 6, 2016

Jefferson Lab Weekly Briefs
October 6, 2016

12 GeV Upgrade

The Torus magnet for CLAS12 has been cooled down to 5 Kelvin in the coils. Tuning of the cryogenic circuits is ongoing to establish stable helium levels in the magnets, and final interlock checkout is underway. Once this is complete, then the first tests with current are planned, starting with up to 10 percent of the design current to check that the magnet is indeed superconducting and the field is as expected. Further tests will then ramp to successively higher currents, followed by a map at full current of the field near the hub in each of the six sectors.

The two splices connecting the first and third, and the second and fourth, of the four “Field” coils of the CLAS12 Solenoid have been made and then clamped in place with G-10 and thermally anchored using copper cooling blocks to the coil thermal mass to insure the splices themselves are superconducting. The helium piping, including supply, return and quench piping, is now being welded in place. This is the last step in fabricating the bobbin carrying the four field coils of the Solenoid. The fifth, or “Shield”, coil for the Solenoid is complete and has the preparatory work needed to splice it to the first four coils also complete. The Shield coil is suspended in the specialized tooling used to mate it with the first four coils for the Solenoid. In this next, major step, the five coils are joined into one assembly by suspending the bobbin with the four Inner and Intermediate coils inside of the bobbin for the Shield coil. This “cold mass” assembly is then covered with a radiation screen and multi-layer insulation before being placed inside the cryostat for the Solenoid. Planning for shipping the Solenoid to Jefferson Lab is now underway, including the design of the shipping cradle and isolation springs needed for the road trip to Virginia.

Hall C is waiting for the Q2 magnet to arrive. Once the magnet has arrived, it will be uncrated and loaded on a low-boy trailer for transport to Jefferson Lab. The magnet will be placed on the Super High Momentum Spectrometer platform, where it will undergo acceptance testing, final installation and commissioning.

Facilities Management & Logistics

Data Center Work to Impact CEBAF Center F-Wing Access on Saturday, Oct. 8
The Computer Center 10-Year Plan portion of the Utilities Infrastructure Modernization Project will be installing foam insulation in the Data Center on Saturday, Oct. 8. CEBAF Center occupants may notice a musty odor on the first floor near this work. A portion of the CEBAF Center 1st floor F-Wing hallway will be temporarily closed due to subcontractor insulation and air hoses impeding the walkway. Hoses will be routed from inside the Data Center to the exterior through F111 (see map). The CEBAF Center F-Wing K stairwell will also be affected, and it will be open for use for the second and third floors only. Additionally, the contractor will have a work truck set up in the loading dock driveway. Due to the extensive area that this work will affect, Facilities Management & Logistics recommends that lab staff and users plan to avoid this area on Saturday and plan instead to use the CEBAF Center FWing L stairwell entrance for access to the F-wing. For questions or concerns about this work, contact Michele Solaroli at or x7751.

Jefferson Lab Calendar of Events

Oct. 5-7: JLEIC Collaboration Meeting
Oct. 13: American Red Cross Blood Drive
Oct. 17: Safety Shoe Truck on-site
Oct. 17-19: Physics of Photocathodes for Photoinjectors (P3) Workshop
Oct. 24: Jefferson Lab All-Staff Photo
Oct. 27: JAG Oktoberfest
Nov. 24-25: Thanksgiving holiday, Jefferson Lab closed

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.

Computing and Networking Infrastructure

CNI Group Works to Integrate macOS Sierra (10.12) into CUE
The latest version of the macOS, Sierra (10.12), was released on Tuesday, Sept. 20. Starting today, Sierra will be available to customers as an automatic download via the App Store. The IT Division is currently working to integrate Sierra into the Common User Environment for Jefferson Lab-owned Macs. If you're currently using a Jefferson Lab-owned Mac, please do not install Sierra until further notice. Once the IT Division has integrated Sierra into the CUE, an announcement of support will be made, and you can then install Sierra on your Jefferson Lab-owned Mac. If you have any questions or concerns about this announcement, contact the IT Division Helpdesk  at x7155 or


Save the Date: Say Cheese for the First All-Staff Photo in Two Decades!
On Monday, Oct. 24, Jefferson Lab Public Affairs is planning to capture the first photo to be taken since 1996 of all staff members. All regular, term and casual staff members who receive their pay checks from Jefferson Science Associates, LLC, are invited to participate. The photo will be taken at 9:30 a.m. on-site near CEBAF Center. Further details will be announced nearer the date. If you have questions about the event, contact Public Affairs at or x7263.

Flatbed Trailer for Use by LCLS-II Only
A flatbed trailer has been parked in the lay-down area on the Accelerator Site. The black curtain-side on the trailer has "Miller Transfer" printed in white letters, and a yellow Kingpin lock is installed on the fifth-wheel coupler. The trailer is strictly for use by the LCLS-II project for transporting Cryomodules off-site; no other usage is authorized. If the trailer is impeding other work and needs to be moved, contact John Fischer at x7408. For other inquiries regarding the trailer, contact Naeem Huque at x7485.

Come Out and Enjoy JAG Oktoberfest!
Jefferson Lab employees and users are invited to the Jefferson Lab Activities Group (JAG) Oktoberfest scheduled for Thursday, Oct. 27, 3-6 p.m. in the field behind the SURA Residence Facility. A variety of foods will be available, as well as games and activities, including a Bounce House and Pumpkin Toss. The United Way winning raffle tickets will be drawn at 4:30 p.m. For more information, see the JAG website.

Volunteers Critical to Oktoberfest Success
Volunteer participation is critical to the Oktoberfest's success. Volunteer positions are available for a variety of activities, ranging from tent set-up, replenishing food, distributing ID bracelets and clean up. Volunteer for an one hour and party the other two! The best volunteer spots are taken early, so sign up today.

Red Cross Blood Drive Scheduled for Thursday, Oct. 13
The next American Red Cross Blood Drive will take place Thursday, Oct. 13, 10 a.m.-4 p.m. in CEBAF Center room F113. To schedule an appointment, visit and enter Sponsor Code: TJNAF. You can also schedule an appointment by contacting Johnie Banks at or x7539. Visit the website for donation eligibility requirements.

Tornado Warning Siren Test Set for 10:30 a.m. on Friday, Oct. 7
Jefferson Lab's tornado warning siren will undergo its monthly operational test at 10:30 a.m. on Friday, Oct. 7. 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.

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.