Jefferson Lab Weekly Briefs March 18, 2015
Jefferson Lab Weekly Briefs
March 18, 2015
12 GeV Upgrade
The second superconducting magnet for the new Hall C Super High Momentum Spectrometer (SHMS) was delivered on March 6. The HB (Horizontal-Bend) magnet is the end product of a program that started in 2006 as an R&D collaboration between Jefferson Lab and Michigan State University. Construction began in 2010 and has involved staff of the National Superconducting Cyclotron Laboratory and the Facility for Rare Isotope Beams, as well as MSU. The HB Magnet must be compact but provide a high magnetic field, so that particles scattered at very small angles from the electron beam may be captured and analyzed by the SHMS. It uses saddle-shaped coils wound using reshaped SSC superconducting cable. The coils are tightly enclosed within a thick, heavily-welded stainless-steel H-shaped box. It must resist the 180-ton force that the coils will exert on it when they are fully energized. The HB Magnet is currently passing a series of incoming inspections on the floor of Hall C. It will be put in place on the SHMS carriage in the coming weeks.
At the request of DOE's Office of Nuclear Physics, Stephen Meador, Director of the Office of Project Assessment in DOE's Office of Science, convened a team of seven experts and five observers in an Independent Project Review of the 12 GeV CEBAF Upgrade Project held at Jefferson Lab on March 12. This review was to follow up on remaining questions from the November 2014 review. In the closeout, the committee found that the team had appropriately addressed recommendations from previous reviews. Further, while the superconducting magnets present challenges – with continued emphasis on process control, QA and vendor oversight – the project is positioned to be completed within the established cost and schedule performance baseline.
Jefferson Lab Published Journal Articles March 9-13
Remember to submit your papers for approval to the Jefferson Lab Publications database.
JSA Minority/Female Undergraduate Research Assistantship
HUGS Is Accepting Applications
New evidence for the interesting charmonium-like state X(3872) has been found from first principles using lattice QCD. The quark-antiquark and DD* Fock components are found to be more important for this state than the diquark-antidiquark ones. The charged partner of the X(3872) is not found in this simulation, in agreement with the absence of such a state in experiment. The yet unconfirmed state Y(4140) is searched for by simulating the 1++ channel with hidden strangeness, but no candidate for this state is found.
Jefferson Lab Calendar of Events
March 23: Annual T-Shirt Contest entry deadline
Environment, Safety, Health & Quality
Making Configuration Changes Safely
Jefferson Lab's Configuration Management (CM) Program is in place to help prevent such unsafe changes. It is derived from DOE-STD-1073: Configuration Management, which states that the objectives of CM are to establish consistency among design requirements, physical configuration and documentation (including analysis, drawings, and procedures), and to maintain this consistency throughout the life of the facility or activity, particularly as changes are being made. Configuration Management is accomplished through the key elements of:
At Jefferson Lab, the governing procedure for the entire lab is QA44: Configuration Management Governance Procedure. This procedure references document ENG-AD-01-001, currently revision A, The Conduct of Engineering Manual. Chapter 5 defines Configuration Management.
New Jefferson Lab Policy Posted: Assessing and Approving Outside Work
Weight Loss Support Group Planning Meeting
Last Chance to Enter 2015 Annual T-Shirt Design Contest
New JLab SOTRs Can Get Required Training on March 24
2015 E-Commerce Vendor Fair
All members of the Jefferson Lab community are invited to the annual JSA E-Commerce Vendor Fair scheduled for 9 a.m.–1 p.m. on Thursday, March 26. The theme is safety, so come ready to ask vendors about their safety information, supplies and equipment. Vendor displays and tables will be set up in the CEBAF Center atrium and room F113. Refreshments will be available throughout the day. If you have any questions or concerns about this event, contact Renee Carter, x7954.
Student Projects, Volunteer Mentors Needed for High School Interns
|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.|