Jefferson Lab Weekly Briefs
February 10, 2010

12 GeV Upgrade

The January 2010 tunnel work for 12 GeV installation is wrapping up, with tunnel lock-up starting in a few weeks. All radiofrequency waveguides for the penetrations have been installed in the new zones, and final plates and stone filling of the penetrations are in progress. Cryomodule baseplates for the new zones have been installed, with only a few plates remaining for final alignment and grouting. Arc 10 stand layouts and anchor installations have been completed. Installation of the west arc low-conductivity water (LCW) five-inch supply and return line is in progress.

Physics

HDice Frozen Spin Target for CLAS
The HDice project has taken beneficial occupancy of the Northwest Annex of the Test Lab. The newly renovated space provides a series of pits that will house the dilution refrigerators and low-temperature cryostats that will be used to polarize solid hydrogen. Work continues in parallel on a new cryostat that will hold polarized solid HD within the CLAS detector.

Theory Center

A new study of the γZ box diagram contribution to parity-violating electron scattering has just been completed using dispersion relations, arXiv:1002.0740 [hep-ph], with input constrained by recent JLab data on electroproduction in the resonance region, as well as high-energy data from HERA. Within the Standard Model, this correction moves the central value of the proton weak charge, for the kinematics of the Q-weak experiment, from 0.0716(8) to 0.0763{+0.0014}{-0.0009}. The shift in the central value is highly significant with respect to the anticipated Q-weak experimental uncertainty of ±0.0032, while the small increase in the error associated with the Standard Model expectation is very minor.

JLab's Safety Numbers

19 Days since Last Recordable Accident (JLab record: 331)
19 Days since Last Lost Workday Accident (JLab record: 676)

JLab Calendar of Events

Feb. 10: Colloquium: The Technology of Particle Therapy: Today and Tomorrow
Feb. 15: Presidents Day holiday - JLab closed
Feb. 25: Safety Shoe Vendor onsite
Feb. 27: Virginia Regional High School Science Bowl
March 2: Science Series Lecture: Restoration of the USS Monitor
March 6: Virginia Regional Middle School Science Bowl
March 10: Colloquium: Physics and Forensics
March 25: Safety Shoe Vendor onsite

 

 

 

Environment, Safety, Health & Quality

Here are a few, simple steps that all of us can take to help ensure a safe office and work area: Use approved step stools and ladders (never stand on chairs, desks, boxes or etc.)

  • Keep aisles, walkways and floor areas clear
  • Hold onto chair arms/back/seat when sitting or rising
  • Obtain an ergonomic assessment by calling Occupational Medicine
  • Use only office furniture approved by Facilities Management and Logistics
  • Clean up spills immediately to protect colleagues and yourself from slips
  • Close file, desk and cabinet drawers in your area
  • Report clutter to your supervisor and safety warden
  • Contact Facilities Management and Logistics to resolve deficient conditions

Computing and Networking Infrastructure

Linux/Mac Printing Changes
The CNI group has begun supporting printing via a central CUPS server for use on both Unix/Linux and Macintosh systems. Users can go online to find out how to configure and use this printing method. The previous use of PDQ and XPDQ will be discontinued on March 1. If you have questions or concerns, you may contact the Helpdesk at x7155.

CNI Maintenance Day, Tuesday, Feb 16
The CNI group has planned a maintenance period from 5-10 p.m. on Tuesday, Feb 16. During this time, central servers, including e-mail and web servers, will be rebooted to complete patch installations. Additionally, network connectivity on the 2nd floor of CEBAF Center's F Wing will be down from 5:30-7:30 p.m. as the network switch undergoes maintenance. Plan accordingly for this network outage. In addition, the central calendar server will be down for about one hour; it will be back online no later than 10 p.m. For additional information, check the Scheduled System Maintenance webpage.

New General Purpose Solaris System Available
A new general purpose login server, jlabs3, is available to all users and staff at JLab. This system is running Solaris 10 and will be replacing the current general purpose systems: jlabs1 and jlabs2. If you cannot use the central linux systems (jlabl1, jlabl2 and jlabl3), then begin using jlabs3, since jlabs1 and jlabs2 will be taken out of service in the near future. If you have any questions or concerns, e-mail or call Kelvin Edwards, x7770.

Announcements

JLab’s 2010 Benefits Open Enrollment Begins Next Wednesday
The Benefits Open Enrollment will be offered via the Employee Self Service System to all regular and term staff employees beginning on Wednesday, Feb. 17 and closing on March 2.


Volunteers Needed for Science Bowls on Feb. 27 and March 6
Volunteers are needed for a range of activities for the Virginia Regional High School (rescheduled for Feb. 27) and the Middle School (March 6) Science Bowl competitions. Training and practice is provided to all volunteers. All volunteers receive a 2010 original-design Science Bowl T-shirt and lunch if they work all day. JLab staff, users, spouses and children (over age 13) are eligible to assist. Anyone interested in more information or in volunteering may contact Jan Tyler.

Particle Therapy Colloquium and Public Lecture
Dr. Jay Flanz of The Francis H. Burr Proton Therapy Center, located on the main hospital campus of Massachusetts General Hospital, will present "The Technology of Particle Therapy: Today and Tomorrow," a special colloquium today at 4 p.m. in the CEBAF Center auditorium.

Valentines Week at the Quark Cafe
In Celebration of Valentines Day, the Quark Cafe is featuring a different chocolate dessert Monday through Thursday this week. On Thursday, Quark Cafe staff will offer a variety of tempting lunch specials, including steak pinwheel with sun-dried tomato dressing, shrimp scampi with jasmine rice, steamed lemon asparagus, lobster mashed potatoes and mini-French fries. The Quark Cafe is located in CEBAF Center and is open daily from 11:30 a.m. to 1:30 p.m. for lunch.

Free H1N1 Flu Vaccination Clinics Offered Locally
H1N1 vaccinations are being offered free of charge through February. On Wednesdays, a clinic will be held at Sentara Port Warwick from 9 a.m.-2 p.m. and 4 p.m.-7 p.m. On Thursdays, a clinic will be offered on the Sentara CarePlex Hospital Campus at the Hampton River Medical Arts Building from 9 a.m.-2 p.m. and 4 p.m.-8 p.m. More detailed information can be found on the Occupational Medicine webpage.