Jefferson Lab Weekly Briefs August 1, 2012
Jefferson Lab Weekly Briefs
August 1, 2012
12 GeV Upgrade
There are now four operational 12 GeV cryomodules plus associated new radiofrequency zones installed in CEBAF. In-tunnel checkout of the fourth cryomodule (C100-4) has been completed, and it was operated at 106 Megavolts. Assembly of the remaining six C100 cryomodules has resumed in the new work area in the Test Lab Addition. The vendors for the major components of the new refrigerator, the Central Helium Liquefier-2, continue their on-site installation work. Excellent progress is being made on the rework of the beamlines, including completion of nearly 50 percent of the total required machining on the re-used dipole magnets.
Q-weak removal is continuing in Hall C. The main detector bunker, shield wall and Ferris wheel (main detector support structure) have been removed from the hall. Two of the three lead acceptance-defining collimators have been dismounted, and work continues on the region I collimator and hardware. The Engineering Division is removing the beamline upstream of the Q-weak target, a prerequisite to the eventual removal of the Short Orbit Spectrometer.
Installation, removal and alignment work is continuing in the CEBAF tunnel and halls, including the removal of the beamline to Hall C, a non-trivial task given the height and complexity of the system. A lot of attention has been given this week to the preparation for the Central Helium Liquefier warm-up, scheduled to start today. A complete and controlled warm-up of the CHL-1 and the Linacs is a first in the history of the lab and a critical step towards the upgrade to 12 GeV. The equipment needed for the demolition of the large wall in the Test Lab is on site, and work should start this week.
The FEL team completed the DarkLight beam tests early last the week. Until today, the team has provided time for some beam studies of halo, for Terahertz measurements and for alternative transport setups.
Center for Theoretical and Computational Physics
To see if the BFKL pomeron is relevant for existing or future deep-inelastic scattering accelerators, such as the Electron-Ion Collider (EIC) or the Large Hadron-electron Collider (LHeC), one needs to know how large are the next-to-leading order (NLO) corrections to the pomeron intercept and pomeron residue (the so-called "impact factor"). In a new paper, Theory Center staff confirmed the NLO intercept of the pomeron and obtained for the first time the NLO impact factor for the photon. The result is represented as an NLO transverse momentum factorization formula.
Facilities Management and Logistics
Electronic Forms Now Available for Property Storage Requests
JLab Calendar of Events
Aug. 3: JLab 2012 Summer Interns Poster Session
Environment, Safety, Health and Quality
Temporary Worker Training
Every worker should be looking out for their fellow workers' safety, especially of those who are undertaking tasks that they don't perform on a regular basis. Sharing experiences, noting proper protocols and conducting a task-hazard analysis beforehand are all good practices that will help a job run smoothly and prevent injuries.
Computing and Networking Infrastructure
Zimbra Training Offered in August
JSA Initiatives Fund Proposal Deadline is Friday
2012 JLab T-Shirts Back by Popular Demand - Preorder by Aug. 9
Quantities are limited, so be sure to order yours today!
Department of Energy Sponsors Food Drive at JLab, Aug. 6-16
JLab to Test Tornado Warning Siren Friday at 10:30 a.m.
Onsite Blood Drive Set for Aug. 21
JLab Community Invited to Intern Poster Session on Aug. 3
Tracking Thomas at JLab
Congratulations this week go to Ryan Roussel, Samika Hawkins, Tommy Michaelides Dave Fazenbaker, Brita Hampton and Pashupati Dhakal, who were the first to correctly identify the location for July 25. Honorable mentions go to Saptarshi Mandal, Narciso Gomez, Michelle Shinn, Anna Cornejo, Harry Fanning, Lori Zukerman, Dan Lazarz, Abi McFarland, Robert Martin and Keith Harding. Check out the Tracking Thomas webpage for a better view of his last location and this week's new mystery photo.