Jefferson Lab Weekly Briefs - July 13, 2016
Jefferson Lab Weekly Briefs
July 13, 2016
12 GeV Upgrade
Hall C staff recently finished installation of the scattering chamber, both of the Super High Momentum Spectrometer sieve-slit stations and of the complete SHMS vacuum system through the first two magnets. Permanent installation of the cryogenic gas lines has advanced as far as possible before the final magnets arrive. These three remaining magnets have experienced good progress recently. The Q2 quadrupole has just passed its pressure tests, and now the thick final welds for the outer vacuum vessel are being made. A preliminary seal weld is in place on the dipole so that it can be pumped-out and undergo its pressure tests in the coming days. Seal welding, pressure testing, and final welding of the Q3 magnet will come next.
Jefferson Lab Published Journal Articles, Feb. 8-12
Remember to submit your papers for approval to the Jefferson Lab Publications database.
A Note to Publication Authors
Center for Theoretical and Computational Physics
Flavor singlet contributions to nucleon matrix elements are a major challenge for lattice QCD calculations, as they require the computation of the trace of a large matrix which is only implicitly known through the quark propagator. A new paper describes a numerical method that allows for efficient computation of such traces. This method relies on projecting out the lowest singular vectors of the Dirac matrix and improves over the previous "Hierarchical Probing" method that allowed precise computations of strange quark contributions to nucleon electromagnetic form factors.
Jefferson Lab Calendar of Events
July 21: 50 Years in the DOE SC Complex: A Symposium Honoring Claus Rode
2016 Summer Physics, Science Education, Enrichment Programs at JLab
Computing and Networking Infrastructure
IT Division Maintenance Period Set for Tuesday, July 19, 5-10 p.m.
Last Chance to R.S.V.P. for July 21 Symposium to Honor Claus Rode
Hall C Safety Awareness Training Updated: Current Training Expires Sept. 1
Red Cross Blood Drive Scheduled for Tuesday, August 16
Retirement Reception for Lyn Wells Set for July 18
|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.|