Jefferson Lab Weekly Briefs August 26, 2015
Jefferson Lab Weekly Briefs
August 26, 2015
12 GeV Upgrade
Commissioning of the tunnel air conditioning system installed under the 12 GeV CEBAF Upgrade project is finishing up this week. The chilled water to the chilled beams in each arc was balanced last week. A final inspection was held on Aug. 18, with representatives from the project, the construction contractor, Facilities Management & Logistics and ESH&Q. The construction contractor is working to complete the punchlist items in the tunnel by end of the month.
Center for Theoretical and Computational Physics
The lowest-lying masses of baryons made of heavy quarks have been analyzed as a function of the number of colors Nc in QCD. Using the well-known potential between static color charges determined in lattice QCD at various Nc and a Hartree approximation, predictions for those masses are given. The considered limit of large Nc and large quark masses is the cleanest possible for predicting baryon properties using analytic methods; comparison with early lattice QCD calculations of baryons at Nc = 3, 5 and 7 are discussed and similar calculations with heavier quark masses are encouraged.
The Machine Shop is currently working on these projects for various clients around the lab:
Jefferson Lab Calendar of Events
Aug. 27: Jefferson Lab Employee Tour
Environment, Safety, Health and Quality
Employee Death Due to Lack of Situational Awareness
Here at Jefferson Lab, we also have situations where worker safety can be affected by factors outside the direct work area. These factors include possible configuration changes in equipment or possible changes in processes that may be made without worker knowledge. Before you begin a task, plan your work and communicate those plans to others using the appropriate Task List (ATLis, for example). Then, it only takes a few minutes to do a pre-job walkdown to verify that the conditions and configurations you thought were in-place are still "good to go” and to look for items that may negatively impact your work or could compromise another's safety. Finally, remember to use the Lock, Tag, Try procedure process or configuration management tools, as appropriate, to maintain safe working conditions.
Computing and Networking Infrastructure
MIS Outage Set for Saturday, Aug. 29
Jefferson Lab Campus-Wide Phone Outage Scheduled for Saturday, Sept. 12
To Get Help and Report Emergencies During the Outage:
Inquiries during the outage can be made to Jefferson Lab Security’s cell phone at 757-342-9868. For more information regarding this outage, contact the IT Division Helpdesk, x7155.
Volunteers Needed for Gloucester County Public Schools STEM Career Day
Volunteers Sought for Sept. 11 United Way Day of Caring
2015 Jefferson Lab Fall Golf Outing Set for Sept. 18
|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.|