Jefferson Lab Weekly Briefs
January 27, 2010
Speaker Nominations for the 2010 DNP Fall Meeting
Summer 2010 SULI Program Applications Due
The Injector Two Wien Filter project is going well. The low-conductivity water controls in the South Access Building were upgraded and new valve actuators installed in both the North and South Access Buildings. All the old steel shielding in the north stub dump has been surveyed and stacked on pallets. Repair of tunnel groundwater leaks has begun. Cryo staff continued cooldown of the Standby Refrigerator but ran into problems. The decision was made to defer planned maintenance and run tests on the Cryo plant. The Ops wall repair and maintenance efforts were concluded with the wall operational software upgrade.
The FEL staff held an offsite meeting to discuss future plans for the FEL Division, covering especially the proposed efforts for JLAMP. The team had significant results in getting the Genesis/OPC code and Medusa/OPC running at JLab.
Low-energy nucleon-nucleon, hyperon-nucleon and hyperon-hyperon interactions have been calculated in lattice QCD at a pion mass ~390 MeV <arXiv:0912.4243 [hep-lat]> by the NPLQCD collaboration, involving Theory Center staff and users. The isospin-3/2 N-Σ interactions were found to be highly spin-dependent, and the interaction in the 3S1 channel was found to be strong. The Λ-Λ interaction was determined to be attractive, as anticipated from model-dependent discussions regarding the H-dibaryon.
Construction has started for the Experimental Staging Building (ESB) located at the northeast corner of the accelerator site. The construction contractor has relocated the fence, cleared trees and is placing the surcharge on approximately one third of the building’s footprint, in the more heavily loaded portion of the building. The surcharge is the large pile of sand that you see behind the North Linac Service Building. The surcharge program is a ground improvement technique that pre-consolidates the construction site and minimizes settlement of the building after construction. The need for surcharge on this project is due to a combination of the ESB floor load requirement of 500 pounds per square foot and the thick layer of very soft clay in the construction area. The surcharge will be in-place for approximately 1.5 months and will be removed prior to start of the building foundation construction. Data gathered from the surcharge program will be used as a learning tool to refine and more accurately predict the settlements associated with the remaining portion of the buildings. Dynamic compaction is another method that is used to pre-consolidate soil. This process involves dropping a heavy weight repeatedly on the ground at regularly spaced intervals, which creates significant vibration. Due to accelerator operations, dynamic compaction was not an option for this project.
JLab's Safety Numbers
5 Days since Last Recordable Accident (JLab record: 331)
JLab Calendar of Events
Jan. 25-29: PAC 35
Environment, Safety, Health & Quality
A place for everything and everything in its place. While it's simple in theory, it can be difficult for some to practice. Every quarter, ESH&Q analyzes the data that’s been collected in the CATS, Safety Observation and Safety Warden Inspections databases to identify trends that should be addressed before there is an incident. For the last three quarters, housekeeping has been the top problem category identified by safety wardens.
Poor housekeeping can contribute to incidents by hiding hazards that cause injuries. Good housekeeping leaves work areas neat and orderly; keeps halls and floors free of slip and trip hazards; and removes waste materials and other fire hazards from work areas. It also requires paying attention to important details, such as the layout of the whole workplace, aisle marking, the adequacy of storage facilities and maintenance. Housekeeping requires continual maintenance. You can accomplish this by integrating housekeeping into work processes, considering such questions as: Do you have a plan for maintaining orderly work and storage spaces?, Have you addressed day-to-day cleanup?, and Do you regularly remove wastes and unused materials?
Computing and Networking Infrastructure
IT Helpdesk Hours
Attention JLab Smartcard Users
Using A Personal Cell Phone as A Pager
Pages can be sent from the laboratory's main search page or e-mail addressed using the format USERNAMEfirstname.lastname@example.org. Other paging methods, including directly dialing 584-xxxx, will not work with text-message paging.
Spam and Virus Filtering by McAfee
Employee Job Task Analysis Due Friday, Jan. 29
Last Chance to Sign General Access RWP
New Service Offered at Quark Cafe Every Wednesday from 3-4 p.m.
TIAA-CREF Individual Counseling
Proper Disposal of Non-working UPS Boxes
For more information about a specific UPS unit, check the owner's pamphlet or contact the Helpdesk at x7155. For questions regarding excessing and properly disposing of JLab property, contact the Property office at x7348, x6270 or x5972.