Jefferson Lab Weekly Briefs
August 12, 2009
12 GeV UpgradeThe first components for the upgrade of the accelerator have been received; they will be used in the instrument air system of the upgraded cryogenics plant. The order has been placed for components to be used in the controllers for the stepper motors that will adjust the resonant frequencies of the accelerating cavities. Responses to the Request for Proposals (RFP’s) for cryomodule cold tuners, vacuum vessels and space frames are under evaluation. Similarly, the RFP responses for the isolators to be used in the radiofrequency system (RF) are being evaluated. Responses to the Request for Information have been received for the warm compressors to be used in the cryogenics system upgrade.
AcceleratorThe Scheduled Accelerator Down is wrapping up. The Personnel Safety System certification was completed, with a few things identified. An RF module C50-9 was installed at 1L04. High-current, continuous-wave beam (199 microAmps) was set up to the injector inline dump over the weekend.
Free-Electron LaserThe FEL ran well all last week. Staffers exposed surrogate out-coupler mirrors to 1.06 micron fundamental and harmonic radiation; the transmitted and reflected power was recorded as a function of time for several irradiances. These mirrors were produced by Carmen Menoni and her team at Colorado State University under a Joint Technology Office-Multidisciplinary Research Initiative contract. The Gun Test Stand gun is being high-voltage processed with krypton gas. Preliminary results at 200 kV show improvement in processing the field emitter. FEL staffers successfully certified the Laser Personnel Safety System in user lab 6, so that beam can be brought into the lab to test stability of delivery.
Theory CenterQuark and gluon propagation and hadronization in the nuclear medium provides an experimental probe of the dynamics of color confinement, which forbids a quark or gluon appearing in the final state of a scattering experiment. A comprehensive review article <arXiv:0907.3534 [nucl-th]> outlines recent experimental and theoretical progress in the study of the nuclear modification of parton propagation and hadron production. It covers, in a unified way, high-energy deep inelastic lepton-nucleus scattering, proton-nucleus and heavy-ion collisions, as well as Drell-Yan processes in hadron-nucleus collisions, and provides a preview of new facilities and experiments.
JLab's Safety Numbers28 Days since Last Recordable Accident (JLab record: 331)
336 Days since Last Lost Workday Accident (JLab record: 676)
JLab Calendar of EventsAug. 13: Amazing Caves in 3D lunchtime presentation
Aug. 18: Identity Theft presentation
Aug. 19: Jefferson Activities Group Luau
Aug. 19-21: GPUs for Lattice QCD Workshop
Aug. 27: Safety Shoe Vendor onsite
Sept. 7: Labor Day holiday
Sept. 17: JSA's Electronic Commerce Vendor Show
Environment, Safety, Health & QualitySince mid-June, there have been four reported insect stings at JLab. Although seemingly minor, these types of events are painful, and, if you're allergic, could cause a problematic reaction.
The stings have occurred at various locations across the site, mostly in the fenced area. The main concentration of wasps and bees is in the wildflower areas behind the accelerator service buildings. These areas are near roadways and walking paths, thus stinging insects may be encountered more frequently. Regardless of where you are, stings may be prevented with the following basic information:
Computing and Networking InfrastructureSprint Cell Phone Coverage Extended
Sprint cell phone coverage has been extended into all three of the experimental halls. Anyone with a Sprint cell phone can now send and receive phone calls while in any of the experimental halls.
Helpdesk Summer Hours Ending
The IT division Helpdesk will be closing in the afternoons starting on Monday, Aug. 24. After that date, the Helpdesk will be open from 8 a.m. until noon, Monday through Friday.
AnnouncementsAmazing Caves in 3D
This Thursday, August 13, Peter and Ann Bosted will provide noon-hour 3D photographic infotainment in the CEBAF Center auditorium. Come join the fun as they share their 30-year passion for cave exploring, mapping and photography starting at noon and lasting for about 45 minutes. Three image shows set to music will be presented (each one about 8 minutes long), featuring Mammoth Cave (the longest in the world), the colorful lava caves of Hawaii, and the giant Lechuguilla Cave in New Mexico, generally considered as one of the most spectacularly decorated caves in the world. A brief introduction will be given to each show, and there will be time for questions at the end. 3D glasses will be provided. Please eat lunch before or after the shows (food is not allowed in the auditorium), and please enter the auditorium only through the ground level door, when it will be opened between each show for latecomers. For more information, e-mail or call Peter Bosted at x5851.
Identity Theft: What Is It and How Can We Protect Ourselves?
Alex J. Turner, FBI special agent in charge of the Norfolk Division, will give a seminar on how you can protect yourself and your family from identity theft at 2 p.m. on Tuesday, Aug. 18, in the CEBAF Center auditorium.
JAG Luau Set for Wednesday, Aug. 19
Plans are in full swing for the lab's summer luau. The free event, open to all lab employees and their families, users and students, will be from 3-6 p.m. on Wednesday, Aug. 19, on the lawn behind the Residence Facility. Refreshments will include summer favorites: hamburgers, hotdogs, chips, side dishes, cold beverages, and special treats.
Activities planned for the afternoon include a Hawaiian shirt contest, slip & slide, bean bag toss, limbo, hula hoop contest and tug-o-war. The luau is geared toward families, but adults will be able to join in on the fun as well.
The success of JAG-sponsored events depends on everyone's participation. Volunteering just one hour of your time to assist with set up, or help with an activity or event, or clean up, will go a long way toward making this event a success. JAG needs volunteers to help with a variety of tasks. Volunteer today!
Call for Papers for the International Symposium on Hydrogen in Matter
The Third International Symposium on Hydrogen in Matter will take place Dec. 13-16 at the Indian Institute of Technology Madras, Chennai, India. Symposium sponsors have announced an Aug. 31 deadline for submitting abstracts. Abstract selections will be made on Sept. 15. Selected full-length papers will need to be submitted by Oct. 30. For more information, see the ISOHIM-2009 website or posters around the JLab campus.