Jefferson Lab Weekly Briefs May 21, 2014
Jefferson Lab Weekly Briefs
May 21, 2014
12 GeV Upgrade
Accelerator Operations ended last week, marking the start of the summer 2014 Scheduled Accelerator Down (SAD). During the next three months, construction activities will ramp up as the Utilities Infrastructure Maintenance (UIM) project begins. This work addresses needed infrastructure support for operations in the 12 GeV era. In Hall D, installation work is progressing to prepare for the start of commissioning activities at the completion of the SAD. Hall C work continues on the Super High Momentum Spectrometer (SHMS), with electrical and cryogenic services being installed. Shielding work in the SHMS that began in April will be completed at months end, leaving installation of the access flooring to complete.
JSA Sabbatical and Research Leave Support at Jefferson Lab
Center for Theoretical and Computational Physics
A comparison of proton-deuteron and proton-proton Drell-Yan cross sections for the inclusive production of charged lepton pairs provides the clearest evidence for the flavor asymmetry in the proton sea, dbar - ubar. A new paper computes nuclear smearing and nucleon off-shell corrections associated with the structure of the bound nucleon inside the deuteron, using methodology similar to that employed for studying nuclear corrections in electron-deuteron scattering at Jefferson Lab. The corrections are found to be significant at intermediate and large values of the quark momentum fraction x, and will need to be accounted for in future Drell-Yan experiments at Fermilab and J-PARC which aim to determine the dbar/ubar ratio for x < 0.6.
Training Sessions for Geometric Dimensioning and Tolerancing
Environment, Safety, Health and Quality
Homeowners should contact Miss Utility at least three working days before you plan to dig/excavate. Remember, even if your project is small, it is always best to call. It’s a free service and it is for your safety. Here at Jefferson Lab, we have a similar process for digging/excavation and blind penetration operations. Refer to www.jlab.org/fm/ and look under ‘Fillable Forms’ for more information on these two activities.
Computing and Networking Infrastructure
To avoid problems and delays, be sure to have your card renewed between June 2 and July 11. Once the expiration date passes, the card will no longer work, and the user will not be able to log in to Jefferson Lab systems using the card. If you have any questions or concerns, contact the IT Division Helpdesk, x7155.
Maintenance Period Scheduled for Tuesday, May 27, 5-7 p.m.
Short phone outages on Saturday, May 31
Public Zimbra Briefcase Lives Up to Its Name
Jefferson Lab Spam and Virus filter software changing
Upcoming Jefferson Lab Pager Audit
Open House Photos, Please!
Pressure Systems Awareness Training Offered
Electronic Tour Database
Jefferson Lab Calendar of Events
May 19-22: Program Advisory Committee, PAC41
|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.|