Jefferson Lab Weekly Briefs February 24, 2016
Jefferson Lab Weekly Briefs
February 24, 2016
12 GeV Upgrade
The design of the downstream support structure for the Central Time of Flight (CTOF) detector for CLAS12, as well as that of the installation arm, is now underway. The light fiber bundle to distribute monitoring laser light to the CTOF slats is on order, and the transport crates to move the slats to Hall B have been received. Timing measurements of the assembled CTOF slats have been used to determine the best discriminator settings for timing resolution. Refurbishment of the last of the six sectors of the Low Threshold Cerenkov Counter (LTCC) is complete, with the windows attached and pressure and leak tests passed. Installation of five of the six LTCC sectors has been done, with the sixth sector staged for installation. Installation of the Forward TOF panel 2 sectors is planned for early March, which will complete the Forward Carriage part of CLAS12. The first article is expected to arrive soon for the remaining fast electronic modules, the crate trigger processors, needed to complete the data acquisition and triggering systems for Hall B.
Apply Now for the Graduate Fellowship Program at Jefferson Lab
JSA Offers Sabbatical and Research Leave Support at Jefferson Lab
Center for Theoretical and Computational Physics
The first calculation of strongly coupled-channel meson-meson scattering, with channels πη, KK and πη', is presented using a first-principles approach to QCD. The energy dependence of the S-matrix is determined from the discrete spectrum of eigenstates in three volumes extracted from lattice QCD correlation functions, with the S-wave featuring a prominent cusp-like structure in πη → πη close to KK threshold coupled with a rapid turn on of amplitudes leading to the KK final-state. This behavior is traced to an a0(980)-like resonance, strongly coupled to both πη and KK, which is identified with a pole in the complex energy plane, appearing on only a single unphysical Riemann sheet.
Jefferson Lab Calendar of Events
Feb. 23-26: CLAS Collaboration meeting
Environment, Health, Safety and Quality
Preparation for Adverse Weather
A little preparation now may save you from regrets later.
Microsoft Training Opportunity Offered
Stockroom and Property Updates
The Property Office is processing surplus property to make it available to public schools and institutions for donation. To start the donation process for your unused items, contact Christian Whalen at firstname.lastname@example.org. Also, you can excess any items that you no longer need (whether the item is tagged or untagged) via the Property webpage.
Jefferson Lab Open House Set for April 30
2016 Annual T-Shirt Design Contest Is On
Free Health Screenings Offered on March 23
|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.|