Jefferson Lab Weekly Briefs January 6, 2010
Jefferson Lab Weekly Briefs
January 6, 2010
Radioactive Material Disposal
These waste bins are for disposal of beamline and other hardware that is known/expected to be radioactive. The bins are labeled with reminders about prohibited materials. Do not dispose of materials in these containers that are not potentially radioactive (items that were not subject to activation), or any items listed on the prohibited items list. Standard (non-radiological) waste cans in these locations should be used for materials known not to be radioactive (materials not subject to beam-on conditions).
RadCon will check the bins routinely. For disposal of large items, contact RadCon directly. If you have any questions about use of the containers, contact David Hamlette at 876-1743.
Copier Replacement Schedule Delayed
The work schedule has been updated accordingly, and it's expected that all old machines will be replaced by the end of the week. For the updated schedule, as well as instructions on how to update your drivers, see the copier replacement document. For questions regarding the scheduling of this work, contact Walt Akers.
12 GeV Upgrade
The January 2010 scheduled accelerator shutdown started at the end of December, and tunnel installation work for the 12 GeV Upgrade is in progress. Penetrations have been opened in preparation for the new radiofrequency waveguide installations. Base plate swaps for the new cryomodules are near completion. Electrical power tie-ins to support the civil construction for the Central Helium Liquefier (CHL) building addition and the Hall D Complex have been completed. Additional 12 GeV work planned for this shutdown period include Arc 10 stand layout with anchor installation and the west arc low-conductivity water (LCW) header installations.
JSA/JLab Graduate Fellowship Program
JSA/JLab Sabbatical Support Program
During the holiday break, some scheduled work was performed. The injector vacuum was monitored, 12 GeV baseplates were installed, pallets were staged at the northeast Stub Dump and the energy-recovery setup was removed. There were scheduled power outages in support of new construction; most Linux systems were patched; and devfs memory was restored to full capacity.
The FEL was shut down over the holidays. The FEL team is preparing for installation of the SL-21 module in zone 2.
In a recent study <arXiv:0912.1942 [hep-ph]> it has been found that the coupling to the ρ meson production channel leads to a fair accounting of the exclusive charged pion cross section at large angles. Such a treatment provides an explanation of the s-7 scaling of the cross section (where s is the total center of mass energy squared) in the JLab energy range (up to 12 GeV) that follows from the constraints of unitarity, but does not rely directly on quark degrees of freedom.
Environment, Safety, Health & Quality
Food for Thought: Remaining Focused at Work
Computing and Networking Infrastructure
IT Helpdesk Hours
Main Phone Number for SURA Residence Facility is 757-223-1167
Transportainer Move Rescheduled for Tomorrow
Red Cross Blood Drive at JLab Jan. 22
Puppy Obedience Training at JLab
JLab Road Closure Update and Important Pedestrian and Traffic Notices
JLab's Safety Numbers
48 Days since Last Recordable Accident (JLab record: 331)
JLab Calendar of Events
Jan. 6: Tidewater Regional Fire Academy Graduation Ceremony