Jefferson Lab Weekly Briefs February 8, 2017
Jefferson Lab Weekly Briefs
February 8, 2017
12 GeV Upgrade
Starting on Feb. 3, high-energy beam was delivered to the upgraded CLAS12 spectrometer for the first time. The beam delivery and the performance of the new Hall B spectrometer was quite impressive, as was the commitment of the Accelerator Operations crew and the CLAS12 collaboration in reaching this important event. Beam delivery throughout the weekend was of high quality. All components of CLAS12 (Torus, Detectors, Electronics, Data Acquisition) worked well, and the CLAS12 team was poised for real-time analysis, monitored through event displays and histograms that had been vetted in advance using cosmic rays. This beam run was focused on demonstrating the Key Performance Parameter (KPP) required for completion of this part of the 12 GeV Upgrade Project. The CLAS12 data from the weekend run has been reviewed by DOE, and concurrence that the KPP has been met was received on Feb. 7, 2017. Congratulations to everyone involved in the achievement of this important milestone!
Thanks to the talented efforts of many hard-working individuals during a dedicated period of leak-checking, pressure-tests and welding, the in-place assembly of the Super High Momentum Spectrometer dipole magnet in Hall C has been completely finished. The magnet is now being slowly cooled down, a process that is expected to take about two weeks. The Q3 quadrupole magnet was also pressure-tested and is cooled down. It is filled with liquid helium, fully instrumented and connected to its power supply. Following verification of the interlocks and instrument readings, the low-power testing of Q3 has begun. Final alignment is underway for all of the SHMS magnets, the target scattering chamber, and the upstream and downstream beam pipes. When all five spectrometer magnets are tested and operational, all vacuum systems closed, and the last detector and concrete blocks installed, Hall C will be ready for its beam run to demonstrate the KPP required for completion of this part of the 12 GeV Upgrade Project.
Publications Training Offered
These steps are required for Jefferson Lab's compliance to the Department of Energy's Public Access Plan. If you plan to attend, let Kim Edwards know by emailing email@example.com no later than Thursday, Feb. 23.
Nominations Are Being Accepted for the 2016 JSA Thesis Prize
JSA/JLab Graduate Fellowship Program Now Taking Applications
Apply Now for Sabbatical and Research Leave Support at Jefferson Lab
Center for Theoretical and Computational Physics
A new paper discusses a lattice QCD calculation using the "Domain Wall" formulation of valence quarks and "HISQ" sea quarks. In this setup, lattice simulations can be achieved with small lattice spacing errors with physical quark masses and multiple lattice spacings, enabling controlled extrapolations to the continuum limit. In the future, this technology will be used to perform calculations relevant to hadronic structure, such the nucleon axial coupling.
Jefferson Lab Celebrates National Engineers Week, Feb. 19-25
Environment, Safety, Health and Quality
Danger for Road/Utility Workers in the Twilight/Dark
According to information provided by the Bureau of Labor Statistics on this Centers for Disease Control webpage, more than 100 road workers are killed on the job each year. To reduce this statistic, drivers must be more alert and drive with extra caution around construction zones, especially as those zones approach Jefferson Lab entrances. As the hours of darkness overlap business hours here at Jefferson Lab, you will need to be extra cautious during these times. Give the work zone as much room as possible when passing. Keep an eye out for workers who may not see your vehicle and step up onto the edge of the road. Pay attention to work zone markings and signs, and obey all directions, barriers and flaggers.
Computing and Networking Infrastructure
Critical CUE Software Updates Set for Thursday, Feb. 9
Jefferson Lab Encourages Digital Literacy With Hour of Code Event
Physics Seminar: From Light Hadrons to Charm: Early Results from the GlueX Experiment
Jefferson Lab Benefits Open Enrollment Begins Wednesday, Feb. 15
Reminder: Annual Property Training & Validation Due March 31
Reminder: TIAA-CREF Individual Counseling Sessions Offered
Jefferson Lab Calendar of Events
Feb. 16-18: GlueX Collaboration Meeting
|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: the Communications Office or contact Kandice Carter at x7263.|