Jefferson Lab Weekly Briefs
December 10, 2014
12 GeV UpgradeThe first Coil Cold Mass for the Hall B Torus magnet arrived at Jefferson Lab from Fermilab last month. After addition of some sensor wiring, it was checked for any structural and electrical issues by cooling to liquid nitrogen temperature, and the coil passed with flying colors, after which it was moved to the cryostat factory area in the Test Lab and work was begun to enclose it in its vacuum cryostat. The second CCM is readied for its second and final epoxy potting in its case at Fermilab, after which it will be shipped here. The third CCM is halfway through winding, and the fourth is having its initial parts set up for winding next at Fermilab. The assembly spit for the Torus has been placed and aligned in Hall B, and the cold hub, the first permanent part of the Torus to be added, is installed on it. Pre-assembly of the Torus thermal shields is complete at Jefferson Lab, as well as advance welding of the parts for the vacuum jackets. The practice coil winding for the Hall B Solenoid was completed, epoxy-potted and tested at the vendor and was then shipped to Jefferson Lab. Here, electrical tests were performed, the coil was mapped at low current, and the coil was then sectioned in the shop to check the quality of the epoxy potting. As a result, the vendor was told to proceed to schedule a manufacturing review of the coil winding and epoxy potting, which will take place Dec. 17; after the review, winding of the production prototype coil will commence.
PhysicsJefferson Lab Published Journal Articles Nov. 30-Dec. 5
Center for Theoretical and Computational PhysicsA new analysis studies the semi-inclusive deep inelastic scattering (SIDIS) cross section as a function of the transverse momentum, qT, utilizing soft gluon re-summation techniques. The authors find that the commonly used prescription of matching the re-summed cross section to a fixed order collinear calculation through the so-called Y-factor is problematic, and its treatment requires special attention. Experimental data spanning a wide region of qTare needed for future phenomenological and theoretical exploration of the SIDIS process.
Jefferson Lab Calendar of EventsDec. 15-16: PREX/CREX Collaboration meeting
Dec. 17: Colloquium: Assembling Carbon Nanotubes for Advanced Applications
Dec. 22: Safety Shoe Vendor on-site
Dec. 24-Jan. 2: Holidays and Shutdown Days, Jefferson Lab closed
Environment, Safety, Health and Quality
Take Care with Poisons at Home for the Holidays
Some holiday plants are poisonous if vigorously rubbed or eaten. For instance, the leaves and stems of poinsettias can cause blisters, swelling and irritation. Further, ingesting poinsettia or holly berries can potentially be life threatening. If you have young children of your own or will have young visitors, be sure to place these and other plants or decorations that may cause harm out of reach of younger children.
Computing and Networking InfrastructureZimbra Email and Calendar Upgrade
The Zimbra email and calendar system will be upgraded on Jan. 2, 2015. During the upgrade, there will be intermittent outages as systems are upgraded and rebooted. Current plans are to start the upgrade at around 8 a.m. All email should be back up and stable by 8 p.m. If you have any questions or concerns regarding this upgrade, contact the IT Division Helpdesk at firstname.lastname@example.org or x7155.
CNI Systems Maintenance Period Set for Tuesday, Dec. 16, 5-10 p.m.
The IT Division's CNI group is planning a maintenance period on Tuesday, Dec. 16, 5-10 p.m. During this time, there may be a short incoming email delay while the certificates are updated on several Zimbra email servers. There may also be a short, intermittent outage to the Crytpocard servers; this may cause issues with logging in to the hallgw, and acclogin systems until the update process is completed. Also, updates to Flash Player, Firefox and Thunderbird will be released to all desktop systems. During the maintenance period, there may be some intermittent outages to Common User Environment webservers while system updates are installed. Additionally, patches will be released to all MIS servers; MIS services will be offline for a few minutes while the servers are rebooted after patch installation, and all services should be back online by 10 p.m. Finally, patches will be released to all Windows and Linux systems on-site. Plan on rebooting your desktop system on Thursday or Friday to finalize patch installation. If you have any questions or concerns, contact the IT Division Helpdesk at email@example.com or x7155.
2015 Jefferson Lab Holiday Calendar Posted
Get Involved in Community STEM Events
Photos Now Available from Jefferson Lab Holiday Party
Ends Friday: TIAA-CREF 401(k) GSRA Open Enrollment
Vacation Donation Program Offered Through Friday
2015 General Access RWP Ready for Review
The JAG is sponsoring a Holiday Office Door/Cubicle Decorating Contest. Prizes will be awarded to Best Decorated, Most Original, and Silliest. All employees, users and contractors with an office or cubicle may enter the contest (individuals or groups). Include your name(s), building number and office/cube location. Judging will take place Thursday, Dec. 18. Winning entries will be announced Friday, Dec. 19. Decorations may go up as early as Dec. 1 and should be taken down by Jan. 6. Decorating materials must be fire resistant and only UL-approved lighting/electronics may be used. No unwrapped food items are allowed. To enter, email JAG Chair Mary Jo Bailey by COB Dec. 16.
|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.|