Jefferson Lab Weekly Briefs
June 5, 2013
12 GeV Upgrade
Acceptance testing of the tenth and final C100 cryomodule in the Cryomodule Test Facility has been completed. In-tunnel checkout of C100-3 has been completed and checkout of C100-7 has begun. A major event for the new 4 Kelvin helium plant was recently achieved by producing 4500 liters/hour of liquefaction; this was a contract deliverable performance criterion for the vendor. Testing into shorts has been completed on zone 23 in the North Linac, and testing has begun on zone 25. The installation/re-assembly of the east spreader is lacking only the YB septa magnet, the drift tubes, and some low-conductivity water tubing. The pedestals for the 4-meter dipole magnets in the beamline to Hall D have been installed. Forty of the new 10A trim supplies have been received and another 20 are in transit from the vendor. The new box supply for the arc 1 dipole magnet string is being tested at the vendor’s facility. Plating of the new radiofrequency separator cavities has been completed. All 12 GeV project work for the control system hardware has been completed.
Center for Theoretical and Computational Physics
As lattice QCD calculations steadily approach percent-level precision for the masses and weak decays of stable hadrons, many researchers are exploring progressively more challenging and correspondingly more interesting QCD computations. In recent work, a new method has been developed for calculating the continuous momentum dependence of the QCD vacuum-polarization function. This is related to the measured energy dependence of the production of hadrons in electron-positron collisions and to the QCD corrections to precision Standard Model observables, such as the anomalous magnetic moment of the muon.
JLab Calendar of Events
June 4-5: Super BigBite Collaboration Meeting
Environment, Safety, Health and Quality
Safety and Proper Transaction (Ordering) Codes
Also, the use of the proper code helps in screening for radioactive materials, lasers or other hazards that the professionals in those fields need to either track or add to inventories or licenses, or even notify government agencies. There are quantity limits for various materials Jefferson Lab is allow to have on site due to permits. By not using the correct code, Jefferson Lab may inadvertently exceed those limits, which could have significant adverse consequences.
Be sure to mark the ordering code correctly and not try to sneak something "under the radar" - as improper possession at Jefferson Lab could have far wider impact than you may be aware.
Last Chance to Order 2013 Run-A-Round T-Shirt
JLab Publications Refresher Offered
Sequestration Q&A Posted on Insight
Monthly Tornado Siren Test Set for Friday
Summer Rental Car Discounts For Jefferson Lab Employees
Tracking Thomas at JLab
|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.|