Jefferson Lab Weekly Briefs March 29, 2017
Jefferson Lab Weekly Briefs
March 29, 2017
Jefferson Lab Published Journal Articles, March 19-25
Get Up-To-Date on Professional Publications at Jefferson Lab on April 7
Photo Trivia for Records and Information Management Month
Entry periods will be as follows:
Winners will be announced in the subsequent JLab Weekly Briefs. Prize can be picked up from the library. If you have any questions about the trivia challenge, contact Kim Edwards at firstname.lastname@example.org.
Last Chance to Apply for Sabbatical and Research Leave Support at Jefferson Lab
Center for Theoretical and Computational Physics
A new paper addresses a critical issue in first principles lattice QCD calculations, namely, nonperturbative renormalisation of currents. Using these results, the most accurate calculations to date have been achieved for the mass and decay constant of the φ vector meson. This work can be extended to compute pseudoscalar and vector meson electromagnetic form factors at high momentum transfer, relevant to the Jefferson Lab 12 GeV experimental physics program.
The Metrology Group has completed many tasks in the last two months, including:
In Hall A, the group has completed eight surveys of both the right and left spectrometers. Additionally, the Hall A target was aligned as required after repairs. A system was developed to process all 36 of the various detectors located on Hall B's forward carriage. This will allow rapid calculation of all the detector locations after the forward carriage is moved, relative to the target. Additional work completed in Hall B include the alignment of the central time of flights and many other components in the beamline to prepare for the Key Performance Parameter run.
In Hall C, the survey network of monuments in the hall and on the Super High Momentum Spectrometer (SHMS) and HMS were updated to take into account deflections of the floor due to the increased weight of the spectrometers. Also in conjunction with meeting Hall C's KPP, the target can, beamline, superharps and the beam dump were aligned to specification parameters. All five major magnets on the SHMS have been installed
Over in the CEBAF Accelerator, the beam chopper in the injector was aligned to assist with beam delivery. All survey monuments were also monitored in the accelerator. The monitoring helps track tunnel movements, which is fed to beam operations. Small movements in the tunnel affect beam steering. The alignment crews also assisted in the repair/replacement of the RF separators earlier in the year. Support for the UITF also continues as beamline components are installed.
Work also continues supporting the LCLS-II project. One of the many jobs the crews completed was monitoring the prototype cryomodule before and after the test road trip.
Finally, the magnet measurement group restored the five-meter test stand to operational status.
Environment, Safety, Health and Quality
Emergency Manager Thanks Lab Community for Time on Tornado Preparedness
DOE Women in STEM Panel Discussion Today at 10 a.m.
Food Services Contract Transition: Farewell to Eurest
Food Services Contract Transition: Hello to Elite
In the News: Jefferson Lab Accomplishes Critical Milestones Toward Completion of 12 GeV Upgrade
In the News: Dark Matter in Science
Jefferson Lab Recognized for Sustainable Acquisition
Vote for Your Favorite 2017 Jefferson Lab T-Shirt Design
Red Cross Blood Drive at Jefferson Lab Set For April 11
New 2017 Dates Offered for TIAA-CREF Individual Counseling Sessions
Last Reminder: Annual Property Training & Validation Due March 31
Jefferson Lab Calendar of Events
|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: the Communications Office or contact Kandice Carter at x7263.|