Jefferson Lab Weekly Briefs February 13, 2013
Jefferson Lab Weekly Briefs
February 13, 2013
12 GeV Upgrade
Progress continues on the detector and tagger equipment for Hall D. Some 90 percent of the light guides for the Hall D Barrel Calorimeter have arrived from the University of Santa Maria and are being attached to the calorimeter modules. The full shipment of the light monitoring system that goes with them arrived from the University of Athens. The lead-glass calorimeter is being stacked into its support frame by a group from Indiana University. The Central Drift Chamber is having the gas manifold added at Carnegie Mellon University prior to undergoing full checkout. The fourth package of the planar drift chambers is being assembled. The production FADC-250 modules for reading out the two calorimeters are complete, and more than 90 percent have been tested at the University of Massachusetts. The first articles of the FADC-125 modules have arrived, as have the first F1TDC modules. Florida State University has begun assembling the Time-of-Flight wall. The tagger magnet has been delivered and is being assembled. The cool-down of the solenoid magnet has started, with the magnet now at liquid nitrogen temperature. Further cooling to liquid helium temperature awaits completion of some work on the cryogenics compressors.
Research Assistantship Offered
The FEL team is hosting two graduate students from the University of Guanajuato in Mexico, who will be at the lab for six months on a scholarship funded by the Mexican Science Council. They will be learning about accelerator physics and associated technical/engineering aspects.
Activities for the new injector development have decreased significantly due to funding issues. However, some activities continue at a minimum level. For example, the other half of the gun stainless steel electrode is being hand polished with 600 grit sand paper. Engineering labor will also be kept at a minimum but sufficient to complete the design and drawings for the gun electrode support assembly. The components for the puck engagement mechanism vacuum test are at hand and will be sent to the production chemical room next week for ultra-high voltage cleaning. Afterwards, the system will be assembled and tested in Lab 3A.
Over the past few weeks, the Alignment and Metrology group has:
system cleanup was started last week. The group will be restarting the plant soon. The ESR remains off and warm.
Treat Your Valentine to Lunch at the Quark Cafe
Come Out and Play on the JLab Softball Team!
JLab Golf League Forming for Season; Meeting on Feb. 27
Piping Available for Use
Tracking Thomas at JLab
Crystal Baker correctly guessed the location for Feb. 6. Honorable mentions go to Chris Curtis, Paul Vasilauskis, Debra Brand, Monty Lehmann, Harry Fanning, Dennis Merritt, Michael McCaughan and Dick Owen. Check out the Tracking Thomas webpage for a better view of his last location and this week's new mystery photo.
Environment, Safety, Health and Quality
Hand Sanitizer Available
Also available are disinfectant wipes that may be used for hands as well as for common-use workplace surfaces, such as phones and keyboards. These items can be picked up at Free Stock in Bldg. 90, 8 a.m.-4 p.m., Monday-Friday. If you have any questions, call x6297 or x7225.
Computing and Networking Infrastructure
CNI Maintenance Day, Feb. 19, 5-10 p.m.
If you have any comments or questions about this planned maintenance period, contact the IT Helpdesk, x7155.
Java 1.6 End-of-Life Preparations
Computer User Account Audit
JLab Calendar of Events
Feb. 25: Safety Shoe vendor onsite