Jefferson Lab Weekly Briefs October 19, 2016
Jefferson Lab Weekly Briefs
October 19, 2016
12 GeV Upgrade
The tooling to install the Central Time of Flight for CLAS12 has been delivered. These are the final items of tooling and installation fixtures for the Central Time of Flight, or for any CLAS12 detector on the 12 GeV Project, for that matter; the order includes the installation arm and transport strong-back needed to install CTOF slats into the Solenoid magnet bore. A contract was awarded for the tungsten-based Moeller-electron shield, which is needed to shield the downstream detectors in CLAS12 from that source of background hits. On the installation front, the six Region 2 Drift Chamber sectors have been installed into the Torus magnet, a few weeks after the six Region 1 Drift Chamber sectors were installed into the Torus magnet. Work is proceeding to wire up the low-voltage and high-voltage supplies for these and to prepare the manifolds for the chamber gas. The Region 3 Drift Chambers will be installed once the Torus magnet is tested at high current and then field-mapped.
Library Offers Free Books
Center for Theoretical and Computational Physics
Quantum Chromodynamics describes the strong interactions of quarks and gluons as mediated by a fundamental charge called "color." While in Nature the number of color charges is three, many interesting insights can be obtained by considering a hypothetical world with a large number of color charges, in which the dynamics simplifies and baryons behave like heavy classical bodies. Recent work has applied this method to study the Generalized Parton Distributions measured in high-momentum meson production experiments at Jefferson Lab (π0 and η) and found the predictions to be in good agreement with the CLAS 6 GeV results.
The metrology group has been busy supporting many activities throughout the lab, including the following.
Facilities Management and Logistics
Hogan Drive: Expansion Work to Begin Week of Oct. 24
During much of this process, the Jefferson Lab Hofstadter Road entrance off Hogan will be closed. Incoming traffic to the Support Service Center, Bldg. 28, can enter either at Lawrence Drive off Hogan or down Rattley Road. Traffic exiting the lab will need to leave through the Rattley/Hogan entrance or the Lawrence/Jefferson Ave. entrance. If you have any questions about this work, contact Bob Sperlazza at x6241 or firstname.lastname@example.org.
Jefferson Lab Calendar of Events
Oct. 24: Jefferson Lab All-Staff Photo
Environment, Safety, Health and Quality
Battery Recycling and Disposal
Say Cheese for the First All-Staff Photo in Two Decades!
TIAA-CREF Offers Financial Literacy Resources
Volunteers Needed to Make Oktoberfest a Success!
Jefferson Lab Public Address System Test Set for Thursday, Oct. 20, at 5:30 p.m.
Tickets Still Available for Raffle Benefitting the United Way
United Way Pledge Campaign Continues Through Nov. 7
Colloquium: Gravitational Waves and Black Holes
Veterans Day Collage Needs Your Submissions
Come Out and Enjoy JAG Oktoberfest!
|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.|