Jefferson Lab Weekly Briefs
September 10, 2008
12 GeV Upgrade
Accelerator, Physics, and Civil systems all continue preparations for major acquisitions in FY2009 following the official start of the construction phase. For the civil construction of the Hall D Complex, the Technical Proposals and Offers, Phase II of the solicitation, were received on August 19, 2008. The Technical Evaluation Committee has reconvened and is evaluating the Offerors’ capability. In support of an application to the Commonwealth of Virginia for a permit to discharge groundwater from the excavation dewatering operations, a subcontract was awarded to an environmental consultant to perform groundwater sampling in the planned excavation areas of the Hall D construction site.
In Hall A, the installation of the polarized 3He target is proceeding smoothly, but with some delay. The assembly of the polarized target proper has now been started. The installation of the new electron detector for the Compton polarimeter, designed by the University of Clermont-Ferrand, is near completion with technical support from Clermont-Ferrand. The cooldown of the High Resolution Spectrometers (HRS) has been initiated.
In Hall B, work on the Cerenkov Counter is completed, and a new lifting fixture is being prepared. Maintenance work in the hall has been completed. Preparations for the E1-DVCS run are ongoing. The installation of the Saclay Solenoid is in preparation. Preparation of the DVCS (deeply virtual Compton scattering) Inner Calorimeter has been started by the ITEP group.
Hall C access training will be offered on Monday, Sept. 15 at 1:30 p.m. at the Counting House. Participants must arrive promptly and will need to bring their radiation film badge and must already be ODH (Oxygen Deficiency Hazard) trained.
Hurricane preparations went well. Gun high-voltage beam studies were completed. The ARC3 magnet box supply was repaired and tested "good". A leak at Cryomodule NL04 was detected. Surface monuments for the alignment group were cemented; alignment work is now underway. Finally, the tunnel paging system was taken down for maintenance.
Free-Electron Laser (FEL)
The infrared beamline is now leak-checked and under high vacuum, and the gun bake has established excellent vacuum. FEL staff members are looking forward to bringing the Infrared Demo up the first week of October. High-voltage processing starts this week.
JLab's Safety Numbers
331 Days since Last Recordable Accident (JLab record: 331)
Environment, Safety, Health & Quality
The Thomas Jefferson Site Office will be reviewing the Jefferson Lab Accelerator Startup Plan the week of Oct. 1-5. Per the Site Office, this will be conducted as a performance-based walkdown of the process. The review will focus on the lab's accelerator "startup procedures, protocols and processes" and will cover from "accelerator down to beam on".
Computing and Networking Infrastructure (CNI)
Network Switch Upgrades in the ARC Building
During these maintenance times, the ARC network will be unavailable for several hours while the switches are upgraded to support automatic vlan assignment. To avoid extended outages after the upgrade, register your machine(s) now. If you have no network connectivity on the day following your scheduled upgrade, please contact the Computer Center HelpDesk at x7155.
Maintenance Period Set for Sept. 16, 5-10 p.m.
Tee'em Up for the JLab 2008 Fall Golf Tournament!
Column from Hugh Montgomery
JSA Electronic Commerce Vendor Show
JLab Calendar of Events
Sept. 11: JLab Colloquium and Public Lecture: The Next Great Particle Accelerator