Jefferson Lab Weekly Briefs August 29, 2012
Jefferson Lab Weekly Briefs
August 29, 2012
12 GEV Upgrade
Assembly of C100 cryomodules continues. Excellent progress continues to be made on the rebuild of the beamlines; installation of the new configuration has begun. All stands have been installed in the East Recombiner. Initial installation of the moveable shield wall in the tunnel to the Hall D tagger has begun. Work by the vendors of the compressors and coldbox for Central Helium Liquefier-2 is nearly complete.
Work on removing the SOS spectrometer from Hall C is continuing, with a focus on preparations for removing the dipole in September. Work in the hall this week will be devoted to cleaning up from the flooding. The water level in Hall C reached 28 inches, nearly enough to fill half an Olympic swimming pool.
The FEL team did some very important housekeeping in preparation for future activities by cleaning out storage areas in the shipping containers. The team also tackled a successful recovery from the unexpected effects of a power outage. In addition, presentations were made to the Defense Threat Reduction Agency in Fort Belvoir, while preparations also were made for next week’s FEL conference in Nara, Japan.
Center for Theoretical and Computational Physics
Precision lattice calculations of hadronic masses are now feasible with methods that have an accelerated approach to the physical limit. However, calculations of hadronic matrix elements require additional effort to maintain this accelerated convergence, and additionally require a nonperturbative matching to the continuum renormalization schemes used to analyze experimental measurements. Two recent technical papers, <arXiv:1208.4661> and <arXiv:1208.4591>, demonstrate that such a method exists and is feasible, laying the groundwork for precise lattice calculations of QCD matrix elements, such as the generalized parton distributions of the nucleon.
JLab Calendar of Events
Aug. 29: Theory Seminar
Environment, Safety, Health and Quality
We have all heard the expression – “Just use common sense.” But it’s apparent that “common sense” can mean different things to different people. For example, how would you react if you saw a stack of 10-foot long, 2-inch pipes with no anti-roll wedges or blocks? Or what would you do if asked to go head first into stacks of items that have sharp corners and uncapped bolt threads sticking out, as well as stiff wires sticking out from every direction? Would you consider wearing wrap-around eye protection? The point is that around the lab we see many hazards. Our job is to point them out when we see them – it’s just common sense.
Computing and Networking Infrastructure
JLab Migrates to Zimbra Calendar Over Weekend
The Zimbra training handout, for individuals who couldn't attend one of the four training sessions, will be available for pick up at the HelpDesk and will be posted online at: cc.jlab.org/zimbra
Added Zimbra Training for Designated People and Resources Schedulers
The CNI group has added an additional Zimbra calendar training session for administrators and anyone who handles the scheduling of designated individuals and/or resources. The training session will take place at 1:30 p.m. on Thursday, Aug. 30, in CEBAF Center, room F113.
JLab Mail Delivery
Successful Blood Drive
Important Change in Radiological Status of Hall B
New Dates Offered for Onsite TIAA-CREF Counseling
JLab Publications Refresher Training Offered
The United Way School Tools Drive Is Underway
Tracking Thomas at JLab
Check out the Tracking Thomas webpage for last week's mystery photo.