Jefferson Lab Weekly Briefs October 22, 2014
Jefferson Lab Weekly Briefs
October 22, 2014
12 GeV Upgrade
Civil construction for the 12 GeV Upgrade project has resumed with the backup cooling towers for the low conductivity water (LCW) systems at the North and South Access Buildings. This work was combined with the Utilities Infrastructure Modernization’s cooling tower work at various locations around the accelerator site. The prime contractor is Warwick Plumbing & Heating of Newport News. WPH has done various projects at the Lab before including Hall D and Technology and Engineering Development Facility project mechanical work and the Central Helium Liquefier-1 replacement cooling towers. The 12 GeV backup towers were delivered last week and set in place on the existing structure steel platforms. The solicitation for the last of the 12 GeV Project Civil scope, Tunnel Air Conditioning, has been posted with proposals due on Oct 30. The vendor site visit for this solicitation was held Oct 16.
Jefferson Lab Published Journal Articles Oct. 14 - 19
Remember to submit your papers for approval to the Jefferson Lab Publications database.
Center for Theoretical and Computational Physics
The advantage and disadvantage of different dispersive representations to treat three-body decays are presented in a new paper. In particular, a toy model has been used to analyze the sensitivity of the solutions to the left-hand cut for the two-body scattering amplitude. The change of the Watson theorem produced by re-scattering effects in the three-body final state is also discussed.
In the last month, Electrical Engineering Systems in the Engineering Division completed several major milestones. The DC Power group completed their final piece of the 12 GeV accelerator upgrade, as did the Instrumentation and Controls group. The Safety System group completed their certification process, paving the way for turn on of equipment. With these final items completed, 100 percent of the accelerator scope of the 12 GeV construction project is now finished. Much effort has also gone into restoring equipment to operational status so that accelerator startup can take place. The completion of UIM power outages and cryogenic system recovery allowed the turning on of the 53 radiofrequency accelerating systems and the extraction RF separators, the final EES pieces needed to begin beam operations and tune up. Now that beam is back, the effort will be to optimize all systems so recovery, commissioning and physics operation can resume in the 12 GeV era.
Jefferson Lab Calendar of Events
Oct. 29: JAG Oktoberfest
Environment, Safety, Health and Quality
Prepare your Vehicles Now for Winter
Lastly, if your vehicle is covered by snow or ice in a winter storm, be sure to clean off all of the windows, headlights, signal lights and brake lights before getting behind the wheel. The Virginia Department of Transportation offers additional winter driving safety tips.
Come Out and Enjoy JAG Oktoberfest!
Volunteers Critical to Event Success
Food Drive Begins at Oktoberfest
Sign Up for Cornhole at Oktoberfest
Red Cross Blood Drive Scheduled for Oct. 31
Share Your Photo for Veteran’s Day Tribute
Discount Entertainment Tickets Available
|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.|