Jefferson Lab Weekly Briefs March 15, 2017
Jefferson Lab Weekly Briefs
March 15, 2017
12 GeV Upgrade
With all equipment installed for the 12 GeV Upgrade of Hall C, the hall was swept and locked. The Counting Room was staffed, and the accelerator started delivering electrons to the hall on March 8. Once the beam was measured and tuned, a thin carbon target was put in position in the scattering chamber, and checkout of the new Super High Momentum Spectrometer began. Everything worked as planned! The five superconducting magnets in the spectrometer were turned on and signals from the detectors showed that high-energy particles were passing through them. Researchers collected and quickly analyzed the data and began to optimize the magnet polarities and currents, detector high voltages, trigger timing and data-acquisition settings. The results of the data analysis, including beam properties, was compiled as a demonstration of the Key Performance Parameter, a critical milestone indicating that the Hall C portion of the 12 GeV Upgrade Project has achieved its performance goals. Concurrence that this milestone has been met was received from the DOE Federal Program Manager and Federal Project Director today. The Hall C staff and users now look forward to using this shiny new tool to study some exciting physics.
Jefferson Lab Published Journal Articles, March 5-11
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Center for Theoretical and Computational Physics
Feasibility studies for transverse single spin asymmetries (SSAs) in lepton-pair and quarkonium production have been made in a new analysis for the proposed experiment "AFTER@LHC" (A Fixed Target Experiment at the LHC). Depending on the process, measurements of the transverse SSAs can be interpreted in terms of transverse momentum dependent (TMD) factorization or collinear factorization at twist-3. Combined with TMD measurements in semi-inclusive deep-inelastic scattering at Jefferson Lab, these will provide new insights into hadron structure and the proton spin puzzle.
The Mechanical Engineering Group completed the final set of drawings on the "FRIB Cryomodule Engineering and Design Finalization" work package. This represents the end of two years of work involving the Beta 0.041 and 0.29 modules, where the group took conceptual-design models from the Facility for Rare Isotope Beams as a starting point and developed them into complete engineering packages ready for cryomodule fabrication. Last week, the 0.041 cryomodule was placed and aligned in the FRIB tunnel. The 0.29 cryomodule/coldmass assembly is proceeding, and FRIB is looking forward to early beam commissioning of these cryomodules starting in 2018.
Environment, Safety, Health and Quality
Year-Round Awareness Needed for Tornado Preparedness
NWS Will Send Tornado Warning Test to Weather Radios at 9:45 a.m. on March 21
Computing and Networking Infrastructure
IT Maintenance Day Set for Tuesday, March 21, 5-10 p.m.
Food Services Contractor: More About Elite
ODU Physics Department Open House Set for March 18
Last Chance to Submit Your Design Ideas for the 2017 JLab T-shirt Contest!
Reminder: Annual Property Training & Validation Due March 31
Jefferson Lab Calendar of Events
March 15-17: 3D Nucleon Tomography Workshop
|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.|