Jefferson Lab Weekly Briefs December 23, 2015
Jefferson Lab Weekly Briefs
December 23, 2015
12 GeV Upgrade
After several months of computer modeling and analysis, the Hall C superconducting magnet team was given a green light to test the Horizontal Bend (HB) magnet on the Super High Momentum Spectrometer to its full operating current. An engineer from Michigan State University, where the HB magnet was built, is present each time the current is increased to a new maximum value. The testing program calls for increasing the current in steps and exercising the magnet systems while recording performance data. The data are reviewed for any indication of a malfunction before testing proceeds to the next current setting. As of mid-December, this magnet has been tested to 3500 Amps, or almost 90 percent of its anticipated operating point for the 11 GeV research program.
The three SHMS magnets being built in France are once again making steady progress. The dipole magnet has been shipped back to the magnet vendor's factory where the outer vacuum can, thermal screens and insulation are being assembled around the coil. All of the sub-assemblies for the quadrupole (Q2) magnet are expected to be ready for shipment from the metal shop to the magnet factory in early January. The third quadrupole (Q3) magnet helium vessel final weld is more than 80 percent complete. This vessel and the remaining Q3 components are on schedule for transport to the magnet vendor late in January.
Jefferson Lab New Tech Note, Dec. 7-11
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
Center for Theoretical and Computational Physics
A new paper examines the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA and the anti-up/anti-down quark asymmetry in the proton. The analysis disfavors several models of the pion flux used in the literature and yields an improved extraction of the pion structure function and its uncertainties at small parton momentum fractions. The analysis provides estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.
Environment, Health, Safety and Quality
Careful Cooking Over the Holidays
Jefferson Lab Closed Dec. 24-Jan. 3
Radiation Worker I Class Set for Jan. 19
2015 Holiday Office Door/Cubicle Decorating Contest Winners Announced
Pictures of all of this year’s entries are available for viewing on the JAG website.
TIAA-CREF Individual Counseling Available by Appointment
Mobile Mammography Unit to Visit Jefferson Lab
Rad Workers: Sign 2016 General Access RWP as Soon as Possible
Jefferson Lab Calendar of Events
Dec. 24-Jan. 1: Holidays and Shutdown Days, Jefferson Lab closed
|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.|