Jefferson Lab Weekly Briefs April 9, 2014
Jefferson Lab Weekly Briefs
April 9, 2014
12 GeV Upgrade
The concrete shield house for the Hall C Super High Momentum Spectrometer has been constructed on the new support carriage and is being outfitted with specialized boron carbide and lead shielding panels. Work continues to outfit the platform itself with electrical, cryogenic and other services in anticipation of the arrival of the new magnets. The first two new magnets, the HB dipole and Q1 quadrupole, are now in the last stages of construction of the cold masses, which includes final welding of the helium vessels. Parts for the LN2 shield for the HB dipole have been test fit, and the vacuum vessel and support links for HB are ready. The thermal shield for Q1 has been delivered to the magnet vendor and will be attached next. The first double-pancake of the production coil for the Dipole magnet has been wound. Two more double pancakes are required to complete the first full Dipole coil. The vendor’s second winding station is being readied to start winding of the second Dipole coil in parallel with continuing the first coil. Very similar tooling and techniques will be used afterwards by the same vendor to fabricate the Q2 and Q3 magnets starting in the summer.
Jefferson Lab Published Journal Articles, March 31-April 6
Remember to submit your papers for approval to the Jefferson Lab Publications database.
Time To Celebrate Records & Information Month
RIM Fact of the Week
RIM Not-So-Trivial Trivia Question of the Week
Center for Theoretical and Computational Physics
Computer simulations on a finite space-time lattice ("Lattice QCD") are a first-principles method of describing the internal structure of the proton and neutron on the basis of the fundamental theory of strong interactions, Quantum Chromodynamics. While they deliver increasingly accurate results for static properties and the excitation spectrum, such calculations face considerable challenges in predicting the quark and gluon momentum distributions measured in high-energy electron scattering experiments. At a recent workshop at the University of Maryland's Center for Fundamental Physics, researchers explored an innovative approach that would allow them to calculate these distributions more directly than was possible so far, by simulating cleverly designed virtual high-energy scattering processes on the lattice. If developed further, this approach may considerably extend the reach of Lattice QCD for nucleon structure measured with the Jefferson Lab 12 GeV Upgrade and other facilities worldwide.
JLab Calendar of Events
Environment, Safety, Health and Quality
At Jefferson Lab, our subcontractor, A-Active Pest Control, is certified, licensed and trained to safely handle and apply pesticides. However, it is known that spray cans of pesticides have been used at the lab by employees. These pesticide cans should be handled carefully and should be limited to only urgent situations. For pest control service, submit a Facilities Maintenance Work Order. If you have an immediate need, call x7400.
Computing and Networking Infrastructure
CNI Maintenance on Tuesday, April 15, 5-7 p.m.
Office 2003 End of Support
Red Cross Blood Drive Set for April 15
April 2 Colloquium Available on YouTube
Annual Property Training & Validation Due April 18
Tracking Thomas at Jefferson Lab
Jonathan Trexler correctly guessed the location for April 2. Honorable mentions go to Doug Higinbotham, Anna Shabalina, Ryan Bodenstien, Silvia Miccolai, Mark Weihl, Sam Holben and Dick Owen. Check out Tracking Thomas on flickr for a better view of his last location.
|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.|