Jefferson Lab Weekly Briefs February 18, 2015
Jefferson Lab Weekly Briefs
February 18, 2015
12 GeV Upgrade
The 66 modules needed for all four regions of the Silicon Vertex Tracker (SVT) for CLAS12 have been completed and tested at Fermilab and were then transferred to Jefferson Lab. The cooling plate and support structure to mount the first three of the four regions of the SVT are nearing completion, after which assembly will start in the large clean room in the Experimental Equipment Lab. The magnetic shielding materials for the Central Time-of-Flight (CTOF) have arrived and are being checked. The CTOF slats are glued together and are in the process of having the outer light-tight wrapping added, after which photomultiplier tube mounting and testing will start. The large mirror for the High Threshold Cerenkov Counter (HTCC) has been assembled and is being checked. The large containment vessel for the HTCC has been assembled and stood up on edge in preparation for a test mounting of the mirror on its support ring. The work to refurbish the boxes for the Low Threshold Cerenkov Counter, after its long service in CLAS, is nearing completion, and the mounting of components inside the first box has started in the clean tent. Calibration work for the detectors already mounted on the Forward Carriage (Forward Time-of-Flight, Preshower Calorimeter, and Electromagnetic Calorimeter) has proceeded steadily, and the calibration plans for the entire CLAS12 were recently reviewed.
Jefferson Lab Published Journal Articles Feb. 9-13
Remember to submit your papers for approval to the Jefferson Lab Publications database.
JSA Accepting Applications for 2015-16 Graduate Fellowships
2014 JSA Thesis Prize Nominations Accepted
JSA Accepting Applications for 2015-16 Sabbatical Leave Support Program
Center for Theoretical and Computational Physics
Matrix elements describing the coupling of mesons to photons are embedded in three-point correlation functions, which can be calculated from first principles using lattice QCD. A recent publication explored the application of variational techniques, previously employed in lattice spectrum calculations, to the calculation of these matrix elements, demonstrating a set of methods which can be used to study form factors and transition matrix elements, even for excited states. First results for the pion and its first excitation, as well as for the ρ meson and its first two excitations, were presented.
Jefferson Lab Calendar of Events
Feb. 18-March 2: Benefits Open Enrollment
Environment, Safety, Health & Quality
A level of safety in the workplace where incidents are a rare occurrence does not guarantee future success; however, it is an indication of a strong safety culture. It's up to all of us to never let our guard down. Continuous safety maintenance is the backbone of a strong safety culture and a truly safe workplace.
Computing and Networking Infrastructure
Annual Computer User Account Audit Is Underway
CNI Maintenance Period Set for Feb. 24
Symantec Anti-Virus Software Update On Feb. 24
Jefferson Lab Benefits Open Enrollment Is Underway
JAG Dog Training Club Class Start Date Postponed to Feb. 24
Graduate Student Research Grants Available
Annual Travel Workshop for Travelers
|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.|