Jefferson Lab Weekly Briefs July 27, 2016
Jefferson Lab Weekly Briefs
July 27, 2016
12 GeV Upgrade
Hall B is expecting to begin the cool-down of the Torus magnet later this week following closeout of recommendations from the related Experimental Readiness Review (ERR). In anticipation of energizing the magnet following cool-down, the Physics Division convened a power-up ERR last week, and the team is working to address those recommendations. For Hall C, the inspector in France has certified that Quadrupole 2 (Q2) magnet for the Super High Momentum Spectrometer has passed the required leak and pressure tests, and it is certified to meet the ASME pressure vessel safety code requirements. Q2 is expected to be shipped by the vendor in France in mid-August with arrival in Hall C in mid-September.
DOE Posts Lab Publications
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Center for Theoretical and Computational Physics
A new paper presents for the first time a determination of the energy dependence of the isoscalar π π elastic scattering phase-shift within a first-principles numerical lattice approach to QCD. Hadronic correlation functions are computed, including all required quark propagation diagrams. From these, the discrete spectrum of states in the finite volume is obtained, constraining the S-wave phase-shift up to the K-K threshold. Calculations are performed at two values of the u, d quark mass corresponding to mπ = 236, 391 MeV, and the resulting amplitudes are described in terms of a σ meson, which evolves from a bound state below π π threshold at the heavier quark mass to a broad resonance at the lighter quark mass.
Facilities Management & Logistics
Time-Limited Parking Spaces Now Available
Jefferson Lab Calendar of Events
July 25-29: Program Advisory Committee meeting (PAC44)
Environment, Health, Safety and Quality
Safe Digging at Home and at Jefferson Lab
Jefferson Lab has a similar process for digging/excavation and blind penetration operations. Refer to Facilities Management & Logistics and look under ‘Fillable Forms’ for more information on these two activities.
Annual Property Inventory Continues
Travel Services Transition to Omega World Travel to Begin on July 29
Department of Energy Sponsors Food Drive
Reminder: JSA Initiatives Fund Program Proposals Due Aug. 8
Jefferson Lab Employee Tour Set for Thursday, Aug. 11
Red Cross Blood Drive Scheduled for Tuesday, Aug. 16
Reminder: Hall C Safety Awareness Training Updated
|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.|