Jefferson Lab Weekly Briefs April 1, 2015
Jefferson Lab Weekly Briefs
April 1, 2015
12 GeV Upgrade
The fifth of six coils needed for the CLAS12 torus magnet arrived in its coil case from Fermilab on March 21 and was prepared for testing at liquid nitrogen temperatures. The fourth coil has completed this test at Jefferson Lab and is being readied for adding layers of multi-layer insulation (MLI), to be followed by the thermal shield, more MLI and its cryostat. The third coil has been placed into its cryostat which is now being welded, the second has been moved to Hall B in preparation for mounting, and the first coil is now mounted in place on the cold hub for the torus in Hall B.
Jefferson Lab Published Journal Articles March 23-27
Remember to submit your papers for approval to the Jefferson Lab Publications database.
Records and Information Management Month Fact of the Week
RIM Trivia Question of the Week
All responses must be received by Kim Kindrew by noon on Friday, when a random drawing will take place of all correct answers. One person will win a Starbucks gift card! (Winners will be notified via email no later than 5 p.m. Friday following publication. Limit one gift card win per person.)
JSA Minority/Female Undergraduate Research Assistantship
Center for Theoretical and Computational Physics
Recent theoretical work has provided new insight into the charge and magnetization densities in the proton's periphery, where they arise from the "pion cloud" and can be computed from first principles using methods of chiral effective field theory. The orbital motion of the quantum pions surrounding the proton causes a left-right asymmetry of the internal current in a transversely polarized state and leads to a simple relation between the peripheral charge and magnetization densities. The striking effect attests to the relativistic nature of pion-nucleon dynamics and could be observed in measurements of proton and neutron elastic form factors at Jefferson Lab and other facilities.
The Electrical Engineering Systems (EES) department has had a busy few weeks. The major effort in the past several weeks has been to support operation of the accelerator during set up for three-hall operation. This effort required maintaining and repairing all the usual systems while concentrating on commissioning of the new 750 MHz radiofrequency beam separators that allow simultaneous running of multiple halls at full energy. When a site-wide power outage occurred, efforts were shifted to a rapid response to secure critical systems and to begin recovery and checkout of all accelerator components.
Other tasks that have been in progress have included support for 12 GeV Hall B engineering, work on the LCLS-II project low-level RF controls, planning and costing for an Injector Test Facility (UITF ), a Personnel Safety System Design Review and multiple other improvement projects for the accelerator (dogleg power supply construction, Harp improvements, cavity and stripline beam position monitor upgrades for Halls B and D, and accelerator path length diagnostic enhancements). More of the same is expected as time marches towards the summer shutdown.
Environment, Safety, Health & Quality
Resolving ES&H Concerns
The DOE DPO process ensures that all JSA employees and contractor employees have the right to report environment, safety, and health technical concerns that have not been resolved through routine work processes.
Once your concern has been addressed, communicate any lessons learned to your staff, co-workers, supervisors and your Division Lessons Learned Coordinator. ES&H Manual Chapter 2310 offers more information on concern resolution.
Vote for Your Favorite 2015 Jefferson Lab T-Shirt Design
TIAA-CREF Individual Counseling Available by Appointment
Reminder: RadCon Services Limited March 25-April 17
Student Projects, Volunteer Mentors Needed for High School Interns
Jefferson Lab Calendar of Events
April 11-14: APS April Meeting
|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.|