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.

Physics

Jefferson Lab Published Journal Articles, March 31-April 6

  • Nathan L. Hall, et al. "Hadronic γZ box corrections in Møller scattering." Phys. Lett. B 731 287 (2014).
  • Anatoly Radyushkin and Asli Tandogan Kunkel. "Analytic Evolution of Singular Distribution Amplitudes in QCD." Phys. Rev. D 89 074003 (2014).
  • Alexandre Camsonne, et al. "JLab Measurement of the 4He Charge Form Factor at Large Momentum Transfers." Phys. Rev. Lett. 112 132503 (2014).
  • Carlos Salgado, et al. "On the partial-wave analysis of mesonic resonances decaying to multiparticle final states produced by polarized photons." Phys. Rept. 537 1 (2014).

Remember to submit your papers for approval to the Jefferson Lab Publications database.

Time To Celebrate Records & Information Month
April is Records and Information Management (RIM) Month. Each week in April, look in the JLab Weekly Briefs for the RIM Fact of the Week, followed by the Trivia Question of the Week. Correct responses via email are entered into a drawing for a Starbucks gift card! (Limit one prize per person). For more information, contact Kim Kindrew.

RIM Fact of the Week
Jefferson Lab uses the Department of Energy Records Schedules and the General Records Schedules of the National Archives and Records Administration (NARA) to assign retention and disposition of its records. Each person who is responsible for departmental records should be familiar with his or her particular records retention requirements. The schedules are available on the Jefferson Lab website.

RIM Not-So-Trivial Trivia Question of the Week
Congratulations to Chandra Gilchrist for correctly answering last week's question. Her name was randomly selected from 20 who gave the answer, "Arthur Andersen LLP." This week's question: According to the Department of Energy's R&D Records Schedule, raw data generally has a 10-year retention period. By contrast, this related type of data generally has a lengthier retention period, and may even be considered "permanent" if it relates to a highly significant discovery. All responses must be received at kindrew@jlab.org by noon on Friday, when a drawing will take place of all correct answers. One person will win a Starbucks gift card! (Winner will be notified via email no later than 5 p.m. Friday following publication. Limit one gift card win per person.)

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

April 15: American Red Cross Blood Drive
April 18-19: USQCD All-Hands Meeting
April 21: Safety Shoe vendor onsite
April 22: Colloquium & Public Lecture
April 22-23: APEX Collaboration Meeting

Environment, Safety, Health and Quality

Pest Control
According to the Environmental Protection Agency, a pesticide is a chemical or biological agent used to deter, incapacitate, kill or otherwise discourage pests. If you use a pesticide, you must practice the safe handling and proper application in the most environmentally responsible way. Always read the label on the container and follow the instructions. See the EPA website for more information and informative brochures on safe pesticide use.

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.
On Tuesday, April 15, the IT Division will be conducting a maintenance period, 5-7 p.m. During this maintenance period, all MIS applications will be down while updates are applied to the backend servers. All systems will be back up and running no later than 7 p.m. The login servers (login.jlab.org) will also be updated and a slight configuration change made. Updated versions of Firefox and Thunderbird will be released to all CUE desktop systems. Also, Windows and Linux patches will be released to all desktops and servers. This may cause intermittent outages to services, but all outages will be complete by 7 p.m. Also, plan on rebooting any desktop systems (Windows and Linux) on the Wednesday or Thursday following the maintenance day to complete patch installation. If you have any questions or concerns, contact the IT Division Helpdesk, x7155.

Office 2003 End of Support
Microsoft's support of Office 2003 ended on April 8, along with Windows XP. If you are still using Office 2003, plan now to update to a newer version of Office (2007 or 2010). There are tools available to assist with this upgrade. If you have any questions or concerns, contact the IT Division Helpdesk, x7155.

Announcements

Red Cross Blood Drive Set for April 15
The next American Red Cross Blood Drive is scheduled for Tuesday, April 15, 10 a.m.-4 p.m. in CEBAF Center, Room F113. New and repeat donors are encouraged to attend. Appointments and walk-ins are welcome. To schedule an appointment, contact Johnie Banks, x7539. The linked page lists all eligibility requirements.

April 2 Colloquium Available on YouTube
The colloquium presented on April 2, "Tools, Techniques and Technology Connections of Particle Physics," is now available for viewing on YouTube. Presented by Marcel Demarteau, High Energy Physics Division, Argonne National Lab, the colloquium illustrated the story of invention in particle physics and the interplay between different fields of science and society.

Annual Property Training & Validation Due April 18
Jefferson Lab’s annual Property Custodian Training and annual Property and Key Validations must be completed by Friday, April 18. During this period, all Jefferson Lab property custodians are required to complete their Annual Property Custodian Refresher Training (GEN 150) and then conduct their annual Property and Key Validations. If you have property or property validation process questions or concerns, contact the Property office at x7348, Monday – Friday, 8 a.m. - 4 p.m. or email property@jlab.org. Every person who has one or more Jefferson Lab keys must also validate each key issued to them. If you have any non-essential or non-functional lab keys, return them to Dennis Merritt, Mail Stop 28G. If you have questions about the key validation process, contact Dennis Merritt.

Tracking Thomas at Jefferson Lab
Little Thomas has been visiting all corners of the Jefferson Lab campus, but this week, he's off on Spring Break.

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.