Jefferson Lab Weekly Briefs December 10, 2015
Jefferson Lab Weekly Briefs
December 10, 2015
12 GeV Upgrade
Late last month, the new spectrometer in Hall C was rotated to its maximum angle relative to the electron beam for the first time. This is a triumph for those who designed, surveyed and installed the Super High Momentum Spectrometer, since it must come very close to the curved wall of Hall C. After Jefferson Lab staff removed or relocated a final few items from the wall, the SHMS was rotated to a scattering angle of 40.2 degrees. The design specification calls for reaching at least 40 degrees.
A leak that was previously reported in Q2, one of three SHMS magnets under construction in France, was found to be in the leak-test equipment, not in the magnet. The Q3 magnet coil is inside its helium vessel awaiting further electrical tests before the vessel is permanently welded closed. The vendor continues to lose time due to problems with manufacturing the liquid-nitrogen-cooled thermal shields. Most of the shield pieces are now ready, but fabrication of the inner shield for the dipole remains to be done, as does the final testing of the shields for all three magnets. The outer-most part of each magnet is its vacuum vessel, and good progress is being made on all three of these.
The closure welding is complete on the vacuum jackets of the hex beams connecting the six coils of the CLAS12 Torus magnet that is being assembled in Hall B. Next steps include a detailed survey, followed by transferring the weight of the magnet to the main support legs. The major work in January and February will include installing the cryogenics service tower for the Torus and connecting it to the distribution can for cryogens. The distribution can fabrication is on track for delivery in January. The fabrication of the Torus Service Tower is in its final assembly stage. The Torus and Solenoid magnet power supplies have completed full current tests. Installation of the control cable harnesses and needed firmware is progressing. The vendor for the CLAS12 Solenoid is preparing for epoxy impregnation of both of the “Intermediate” coils. The bobbin for the fifth coil, or “Shield” coil, is expected to be delivered to the Solenoid vendor by mid-December, with the Shield coil to be wound and then epoxy-impregnated by late January.
Jefferson Lab Published Journal Articles, Nov. 30-Dec. 4
Remember to submit your papers for approval to the Jefferson Lab Publications database.
Publications Refresher Course Offered Jan. 12, 2016
JSA Thesis Prize Call for Nominations
JSA Postdoctoral Research Prize Call for Nominations
AIP Congressional Science Fellowship Program Now Accepting Applications
2016 L’Oréal USA For Women in Science Fellowship Program Now Accepting Applications
The Machine Shop has been working on the following projects:
Additional work continues for multiple lab customers.
Computing and Networking Infrastructure
IT Maintenance Day Set for Tuesday, Dec. 15, 5-10 p.m.
BlueJeans Videoconferencing Service Restored
On-Site Safety Shoe Vendor to Change
Mobile Mammography Unit to Visit Jefferson Lab
Jefferson Lab Travel Card Fraud Alerts Offered
TIAA-CREF 401(k) GSRA Open Enrollment Ends Dec. 17
Opportunity to Update Your Form W-4
Holiday Party for Jefferson Lab Children and the Young at Heart
Volunteers Needed for JAG Holiday Party on Saturday, Dec. 12
Toys for Wes' Wish
Celebrate the Holidays with Your Creative Decorations
Jefferson Lab Calendar of Events
Dec. 12: JAG Holiday Party
|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.|