Jefferson Lab Weekly Briefs November 2, 2011
Jefferson Lab Weekly Briefs
November 2, 2011
12 GeV Upgrade
The coils and yoke pieces of the Hall D solenoid are now installed in the hall. All 48 Barrel Calorimeter (BCAL) modules for Hall D have been built at the University of Regina in Saskatchewan, Canada, and 44 have now arrived at JLab. The first full six-layer package (of four total needed) is being tested for the Forward Drift Chamber. The custom preamplifier ASIC, used for the readout of the Forward and Central Drift Chambers, is being assembled onto the production preamplifier boards. All straws are inserted into the Central Drift Chamber at Carnegie Mellon University, and wire-stringing and electronics hook-up wiring has begun. The main production of 2500 bases for the lead-glass Forward Calorimeter is over one-third complete at Indiana University. Bids are being reviewed for the several hundred FADC-250 modules to be used in pipelined electronics and triggers in all halls.
There was a proposal to refurbish the Hall B polarized target magnet and use it in Hall A to replace the one that has burned out. Most of the physics goals (except for some higher-Q2 points) can be accomplished with this plan. This proposal has been approved by JLab management, and the goal is to have the target ready for g2p/GEp in Hall A by mid-February. The target work is being done by the polarized target group (Chris Keith). Meanwhile, Hall A is continuing to prepare for running and hopes to have some commissioning time with beam to check the new beamline instrumentation and detector systems. If Hall A can do it before the winter holiday break, it will make the workflow more efficient when the target arrives.
Studies were done in the injector by Q-weak personnel, and installation and alignment of the Polarized Electrons for Polarized Positrons experiment continued. New and refurbished magnet components were installed in the northeast spreader region, completing repairs to damaged components in this area. A 2K Cold Box trip was initiated to support Central Helium Liquefier repairs on Tuesday. Damaged circulators in several radiofrequency zones resulted in water in RF waveguides. RF commissioning of SL25 continued. RF zone 1L04 was found to have a compromised burst disk, which will necessitate warming up the zone to replace it. An A/C unit in the MCC equipment room malfunctioned, resulting in overheating of the archive server; A/C was restored and the archiver is back online. Checks of box supplies continued throughout the week in preparation for planned beam spin up next week.
The Survey and Alignment group has been busy:
JLab Calendar of Events
Nov. 2: JAG Beam Kickoff Tailgate Picnic
Environment, Safety, Health and Quality
First National Emergency Alert System Test Set for Nov. 9
JLab Beam Kickoff and Tailgate Party
Annual E-Commerce Small Business Vendor Show
Take Time to Tango
JLab Colloquium and Public Lecture Offered Nov. 16
Mark Your Calendar for Fall Feast and Desserts
JAG Dog Club Collects Food Donations for Peninsula Foodbank
Tracking Thomas at JLab
Congratulations this week go to Michael Wilson, Deborah Dowd, Susan Brown, Brita Hampton, Andy Kowalski, Dave Fazenbaker, Karen Bartek, Chandra Gilchrist, Narciso Gomez, Adam Carpenter, DeAnn Maddox, Jason Willoughby, Jodi Patient, Debra Brand and Saptarshi Mandal, who were the first to correctly identify the Oct. 26 location.
Honorable mentions go to Richard Jacobsen, Stephen Smith, Mike Syptak, Casey Heck, Pashupati Dhakal, Sam Stevens, Michael Haddox-Schatz, Tonya Evans, Stephanie Vermeire, Cindy Eller, Kim Kindrew, Stephen Wood, Michelle Shinn, Ryan Bodenstein, Anusha Liyanage, Rob Mahurin, Karsten Flowers, Lori Zukerman, Harry Fanning, Todd Meier, Dick Owen and Douglas Higinbotham. Check out the Tracking Thomas webpage for a better view of his last location and this week's new mystery photo.