Jefferson Lab Weekly Briefs
November 21, 2007
12 GeV Upgrade
The 12 GeV Upgrade achieved a critical milestone on Nov. 9, when the Department of Energy approved the project’s baseline scope, cost and schedule. The approval, known as Critical Decision 2 or CD-2, Approve Performance Baseline, caps years of planning and preparation by the Jefferson Lab User community and project team. According to DOE, CD-2 authorizes the final design phase to begin and is required prior to requesting a project’s construction funding in a federal budget. The 12 GeV project will provide scientists worldwide with a tool to greatly expand our knowledge of the quark-gluon structure of nucleons, nuclei, and the forces that bind them, and further solidify the Lab’s standing as a preeminent nuclear physics research facility. CD-2 is the third step in a five-step process. The final two steps are CD-3, Approve Start of Construction (scheduled for 2008), and CD-4, Approve Start of Operations (scheduled for 2015). This has been an outstanding year for the 12 GeV Upgrade project, with the highest recommendation in the NSAC Long-Range Planning process, the approval of CD-2, and overall excellent progress in ongoing R&D and design work.
After the End Station Refrigerator was repaired and back online, the experimental halls resumed taking beam. Multiple pass changes were done for the Halls, starting with the first one on day shift Nov. 15. Additional pass changes followed on Nov. 16, 17 and 18. By Monday, Nov. 19, a total of 181 hours of beam had been delivered among the three halls, and no major accelerator problems had been encountered.
Free-Electron Laser (FEL)
A lot was accomplished this week in a number of areas. For the Gun Test Stand, the high-voltage power supply was brought up to 500 kilovolts in preparation for hooking up the gun, which requires delivery of the pressure tank that passed certification once a leaky O-ring was fixed. The cathode scanner was successfully bench tested. For the FEL gun, the cathode was installed and pumped down in preparation for the vacuum bake. In the Terahertz Lab, after cooling the solenoid magnet to 2K, it was run up to 16 Tesla. Finally, the pulsed laser deposition system was delivered for Lab 5.
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JLab Children's Holiday Party
Toys for Tots Drive Underway
Ready, Set, Decorate!
JLab's Safety Numbers
JLab Calendar of Events
Nov. 22-23: Thanksgiving holidays
Environment, Safety, Health & Quality
Building Alarm? Evacuate now. No exceptions!
Each person onsite -- whether staff, User, contractor or visitor -- also has a responsibility to themselves and others to actively participate in fire safety. This includes the prompt, orderly evacuation of a building when the fire alarm sounds. An alarm may be due to a developing fire or other life-threatening situation; it could be a planned drill; or it might be due to a speck of dirt in a smoke detector. Trained, appropriately-equipped specialists will diagnose the actual cause, but all occupants need to be out of the building, gathered at their designated mustering point. On occasion, JLab conducts evacuation drills, or there are unplanned alarms, and not everyone proceeds directly to the nearest exit. What would cause this potentially risky behavior? Safety experts name several motivations:
JLab is required by law to conduct fire drills. Studies show that people who have participated in regular fire drills, and in ideal conditions, will evacuate a non-high-rise building in about two minutes. Evacuation time triples to about six minutes when fire drills are not conducted regularly. Building occupants are expected to respond to fire alarm signals promptly and in accordance with the building’s evacuation plan. These are posted on walls at strategic locations. Every occupant of a building should know her or his primary exit route and at least one alternate route. Visitors in buildings, especially those who are unaccompanied by Lab staff, should be informed about evacuation routes and alarm response. During an evacuation, regular occupants should assist visitors in exiting the building and moving to the nearest muster point (also shown on the evacuation diagrams). Attempting to re-enter a building with the alarm sounding or to travel up stairs or against “traffic flow” is both reckless and unacceptable.
Holiday Food Safety Tips
Computing and Networking Infrastructure
'Tis the season for E-Card Scams
Microsoft Office 2007 and Windows Vista
Redhat Enterprise Linux 5 Now Available
Windows Vista Deployment Information