Jefferson Lab Weekly Briefs May 6, 2015
Jefferson Lab Weekly Briefs
May 6, 2015
12 GeV Upgrade
Hall B: The first two regions of the Silicon Vertex Tracker (SVT) for CLAS12 in Hall B have been mounted on the cooling plate in the clean room at Jefferson Lab and are undergoing testing and burn-in. The separate cooling plate and support structure for SVT region 4 is also complete and is being assembled in preparation for mounting. The magnetic shielding materials for the Central Time-of-Flight (CTOF) have arrived and been checked. The CTOF slats have all had their outer light-tight wrapping added, and photomultiplier tube (PMT) and magnetic shield mounting has started. The large mirror for the High Threshold Cerenkov Counter (HTCC) has been assembled, checked and mounted in the large containment vessel. A gimbal-mounted laser is being used to scan the HTCC mirror segments and check the spatial and angular positioning of the 48 mounts for PMTs. The work to refurbish the boxes for the Low Threshold Cerenkov Counter is nearing completion and the mounting of components, including the Winston Cones, PMTs, bases and cabling, inside the first box has started in the clean tent. Calibration work for the Forward Time-Of-Flight, Pre-Shower Calorimeter and Electromagnetic Calorimeter already mounted on the forward carriage is proceeding steadily.
R. Briceno Receives 2015 JSA Postdoc Research Grant
A. Subedi and C. Fanelli Share 2015 JSA Thesis Prize
Both programs are supported by the Jefferson Science Associates Initiatives Fund Program (http://www.jsallc.org/IF/IFProjects.html), a commitment from the JSA owners, SURA and PAE Applied Technologies. Initiatives Funds support programs, initiatives, and activities that further the scientific outreach, and promote the science, education and technology of Jefferson Lab and benefit the laboratory’s extended user community in ways that complement the lab's basic and applied research missions.
Congratulations to Raul, Adesh and Cristiano!
Published Journal Articles, April 27- May 1, 2015
Tech notes, April 27- May 1, 2015
JLAB-TN-15-008. Charles Reece, Ari Palczewski. "Report for JLab High Q0 R&D for LCLS-II - FY14."
JLAB-TN-15-010. David Douglas. "Can A Magnetized Beam Be Generated From A Conventional Uncoupled Beam Using Only Transverse Optics?"
JLAB-TN-15-011. David Douglas. "Aperture Scaling In High Power CW SRF Recirculated Linacs and ERLs."
JLAB-TN-15-012. Kenneth Butler, Michael Talbott, David Shires. "caLabs/LabVIEW implementation of Soft IOC."
JLAB-TN-15-013. Kenneth Butler, Michael Talbott, David Shires. "Labview softIOC using caLabs and pyepics Python client Instructions."
Center for Theoretical and Computational Physics
A new review article <arXiv:1504.05063> provides a summary of experiments that have measured electromagnetic form factors of few-nucleon systems, and of current theoretical approaches used to describe these systems. The theoretical approaches assume that the nucleus consists of interacting protons and neutrons and that the effects of their internal substructure can be accounted for by effective forces and currents. The quantitative success they have achieved in reproducing the data indicates that even at the highest Q2 there is no evidence for new effects coming from quark and gluon degrees of freedom at short distances for these observables.
Facilities Management and Logistics
CEBAF Center Parking Lot Impact During Infrastructure Upgrade Project
Questions about this project may be directed to Michele Solaroli, Facilities Management, at x7751.
Environment, Safety, Health and Quality
Time to Plan for Portable Generator Safety
Additional guidance, provided by the National Safety Council, is available online at: http://www.nsc.org/NSCDocuments_Advocacy/Fact%20Sheets/Portable-Generator-Safety-Tips.pdf
Watch for Insects that Bite or Sting and other Critters
When you do your pre-job walk down, look for flying insects and evidence of wasp nests, and be cautious when disturbing grounds, equipment or building locations that have been undisturbed for long periods. It is also a good time to look for evidence of other critters that can infiltrate work areas (such as snakes). If you see evidence of flying, stinging insects, or other critters, call x7400 and ask Facilities Management and Logistics to respond. FM&L has a pest control subcontractor that routinely applies environmentally friendly insecticide to locations around the site to help manage pests. If you are bitten or stung by a bug of any kind, obtain prompt first aid from Occupational Medicine.
Upcoming Jefferson Lab Pager Audit
Registration for Lab Run-A-Round Closes at 5 p.m. on Tuesday, May 12
Help Make the Run-A-Round a Success: Volunteer to Help out!
Reminder: RadCon Has Moved to 1st Floor Library Area of ARC Building
Jefferson Lab Calendar of Events
|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.|