Jefferson Lab Weekly Briefs December 22, 2010
Jefferson Lab Weekly Briefs
December 22, 2010
12 GeV Upgrade
Contracts have been awarded for the dipole magnet and the second and third quadrupole magnets for the Super High Momentum Spectrometer for Hall C. All three magnets are of the "warm iron" type; separate contracts for the associated steel yokes will be placed in fiscal year 2012. The second coil for the horizontal bend dipole magnet at the front of the SHMS has been wound at Michigan State University. The first thousand meters of the copper stabilizer that is soldered to the superconducting cable has been extruded, with the balance to follow soon, and the contract for the soldering step is now awarded. Assembly of the first two of five cryogenic control reservoirs for the SHMS magnets is nearing completion at the vendor.
2011 SURA Distinguished Scientist Award Nominations Due
Nominations Due for Outstanding Nuclear Physicist Award
JSA/JLab Graduate Fellowship Program
JSA/JLab Sabbatical Support Program
APS April Meeting Abstracts Due
AIP Seeking Applicants for Congressional Fellowship Program
The accelerator has been running well with low trip rates. Both Hall A and Hall B are happy with their beam. On Thursday, there was a beam strike event upstream of the target chamber in Hall C. The event caused the vacuum in Hall C to deteriorate and caused some downtime in the hall. The damaged portion of the beamline was replaced. Hall C started to take beam on Dec. 19.
The machine lased well in the ultraviolet this week, allowing the FEL team to continue characterizing the vacuum ultraviolet third harmonic output.
Theoretical and Computational Physics
New evidence from lattice QCD is presented <arXiv:1012.3812> for the existence of a bound H-dibaryon, an isospin 0, total spin 0, strangeness -2 state with valence quark structure uuddss, at a pion mass of mπ ~ 389 MeV. Using the results of the lattice QCD calculations, one finds an H-dibaryon bound by B = 16.6 ± 2.1 ± 4.6 MeV at this pion mass.
Engineering Division Professional Development Program
The first set of eight seminars will be devoted to Cryogenics and presented by the lab's award-winning staff, Jan. 25-April 26. Two overview sessions are open to all lab staff, representatives from local industry and graduate engineering students who have a professional interest in the topic; overview sessions will be held at Jefferson Lab in the CEBAF Center auditorium. Six technical presentations are for engineers, senior/mid-level technicians and graduate engineering students; technical sessions will be held in CEBAF Center, Room F113. Eight Continuing Education Units will be granted by the Virginia State Licensing Board to professional engineers who complete the cryogenics series. Space is limited and advanced reservations are required for all sessions.
Facilities Management and Logistics
Holiday Shutdown Power Outage Reminder
Reminder: Personal Space Heaters Not Allowed in JLab Work Areas
Computing and Networking Infrastructure
Holidays Trigger Phishing, Spams and Scams
Computer User Audit Coming
Personal Dosimeter Change Out Is Today
Announcing the Winners of the Holiday Door & Cubicle Decorating Contest!
Assist IT Division By Completing Survey and Get Chance to Win Raffle
2011 General Access RWP Available for Signature
JLab Calendar of Events
Dec. 22: Personal Dosimeter Change Out