Jefferson Lab Weekly Briefs
August 20, 2008
12 GeV Upgrade
The pre-bid conference and site visit, attended by over 35 contractor personnel, was held July 21 for the civil construction of the Hall D Complex. A second site visit was held Aug. 8 for another 10 contractor personnel. Approximately 50 proposal inquiries have been answered formally with two amendments issued. Closing date for the Phase II Technical Proposals and Offer was Aug. 19. The Technical Evaluation Committee will reconvene to evaluate the Offerors' capability prior to reviewing the price offers.
On Aug. 19, Facilities Management team members held a meeting with ESH&Q and Accelerator personnel to discuss the internal design and safety review comments of the 100 percent design documents for the Tunnel Air Conditioning project.
The electrical circuit supplied by Transformer LN1 was hooked up to Transformer LN2 using a large cable that was delivered after a delay. The temporary generator that had been supplying power to a few of the LN1 circuits was disconnected (LN1 is undergoing repairs).
The cryomodule at NL12 was removed for rebuilding. A C50-6 cryomodule was placed in the North Linac in the NL11 position, and the lengthy installation process has begun. Trees situated too close to the 40MVA substation were removed due to the potential hazard they represented (falling during a storm and shorting out the substation). And End Station Refrigerator maintenance was completed.
Free-Electron Laser (FEL)The FEL gun is now under vacuum and preparing for a bake. FEL staff used the injector radiofrequency (rf) system for power testing of some rf windows – successfully transmitting 60 kW through a 1500 MHz ceramic window. Staff is now completing the checkout and commissioning of the wiggler controls. The group is down to the last four rf module calibrations and have fully checked out the ultraviolet viewer controller.
The proton in Quantum Chromodynamics is a complicated many-body system, whose properties exhibit quantum fluctuations caused by the random motion of the color fields inside hadrons. In deep-inelastic scattering experiments at JLab energies usually only the quantum average of the quark- and gluon densities is observable. A collaboration of theorists has now pointed out that in diffractive scattering at collider energies (HERA, future Electron Ion Collider) one can see direct evidence of the quantum fluctuations of the quark- and gluon densities and study this fundamental characteristic of the proton [arXiv:0808.0182].
EngineeringThe Engineering Safety Systems Group hosted the 2008 DOE Accelerator Safety Workshop Aug. 12-14. The two-and-a-half day workshop covered accelerator safety topics, such as vacuum systems, nano-materials, radiological concerns, the Accelerator Safety Order, Office of Science safety management, and programmable safety systems. Attendees included representatives from all of the major DOE accelerator facilities and DOE field offices, as well as DOE headquarters. Feedback for the workshop has been very positive.
JLab's Safety Numbers310 Days since Last Recordable Accident (JLab record: 319)
655 Days since Last Lost Workday Accident (JLab record: 655)
JLab Calendar of Events
Aug. 19-21: DOE Security Survey
Environment, Safety, Health & QualityIn order to fully use JLab’s Automated Quality Information - Corrective Action Tracking System (AQIS/CATS - https://mis.jlab.org/ehs/), a Users' Committee was recently formed. AQIS/CATS is one of JLab's primary improvement tools, and as such is used to identify and track high visibility issues as well as trends of all types.
The cross-functional Users' Committee has representatives from all the major AQIS/CATS users across the lab; their intent is to provide feedback for current and future operation of this improvement tool, thus making it more effective in both preventing and managing issues. Currently anyone can view items in CATS and about 90 of our colleagues (ESH&Q, Division Safety Officers, Safety Wardens and general users) can enter items into the database. Bob Doane is the AQIS/CATS administrator in the Quality Assurance/Continuous Improvement group within the ESH&Q Division. Please contact him at x6380 if you have ideas for improvement, suggestions, or questions
Computing and Networking Infrastructure (CNI)HelpDesk Hours Are Changing
The HelpDesk will close in the afternoons starting on Monday, Aug. 25. The new HelpDesk hours will be from 8 a.m. until noon, Monday through Friday.
TIAA-CREF Retirement Counseling Sessions
The annual United Way Day of Caring will be Friday Sept. 12. JLab needs 15 volunteers to spread mulch in existing beds around the Victory YMCA, Yorktown, and perform some minor landscaping and planting. No prior experience is required. Volunteers are asked to fill out this form and send it to Joshua Cameron, CEBAF Center room B214, MS12B, with your supervisor's approval by Friday, Aug. 22. Volunteers must have their supervisor's signature on the Volunteer Form in order to participate. Click here for the complete announcement