Jefferson Lab Weekly Briefs October 12, 2016
Jefferson Lab Weekly Briefs
October 12, 2016
12 GeV Upgrade
After a brief delay in Halifax, the ship bearing the French-built Q2 magnet for the Super High Momentum Spectrometer (SHMS) finally arrived in Norfolk last week. Representatives of Jefferson Lab and the vendor SigmaPhi greeted the magnet at the sea terminal in Norfolk, where it was uncrated and loaded on a lowboy truck for transport to Jefferson Lab. Q2 arrived on the floor of Hall C on Thursday. After passing an incoming inspection, it was promptly surveyed and mounted on the SHMS carriage. Work is now proceeding to connect the magnet to its services and to prepare for its consideration by the Physics Division Experiment Readiness Review committee. The coming weeks will be very busy as Q2 is instrumented and prepared for operation. The second French magnet, the large Dipole, is in Belgium awaiting a ship that will carry it to the U.S. The final new Hall C magnet, Q3, is undergoing final assembly in France and is expected to begin its journey early next month.
Jefferson Lab Published Journal Articles, Oct. 2 - 8
Center for Theoretical and Computational Physics
A new analysis of the strange-antistrange parton distribution function (PDF) asymmetry in the proton has been performed in the framework of chiral effective theory, including the full set of lowest order diagrams with off-shell and contact interactions, in addition to the usual on-shell contributions. The analysis identifies δ-function contributions to the s PDF at zero parton momentum fraction, x=0, with a corresponding valence-like component of the s-quark PDF at larger x. These findings allow greater flexibility for the shape of the s-s difference and will impact the extraction of strange quark PDFs in global QCD analysis.
Jefferson Lab Calendar of Events
Oct. 13: American Red Cross Blood Drive
Environment, Safety, Health and Quality
Cold Weather and Critters
If you encounter what may be a poisonous insect or other animal in a difficult location, the proper response is to leave the insect or animal alone and, if needed, contact Facilities Management and Logistics at x7400 for removal. Never try to kill or physically handle such critters. Jefferson Lab has properly trained contractors who, following the laws and regulations for animal removal, can properly handle the situation promptly.
Computing and Networking Infrastructure
Maintenance Period Scheduled for Tuesday, Oct. 18
Red Cross Blood Drive Scheduled for Thursday, Oct. 13
William & Mary Physics Department Hosts Annual PhysicsFest on Saturday
Colloquium: Gravitational Waves and Black Holes
Veterans Day Collage Needs Your Submissions
Save the Date: Say Cheese for the First All-Staff Photo in Two Decades!
Flatbed Trailer for Use by LCLS-II Only
Come Out and Enjoy JAG Oktoberfest!
Volunteers Critical to Oktoberfest Success
Performance Appraisal Process Is Underway
|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.|