Jefferson Lab Weekly Briefs January 12, 2011
Jefferson Lab Weekly Briefs
January 12, 2011
12 GeV Upgrade
The Hall D Ready-for-Equipment (RFE) inspection was held in early December, with representatives from 12 GeV Upgrade management, the Hall D Group and the ESH&Q Division. The inspection resulted in a summary list of open issues. The construction contractor completed the remaining items and RFE was established on Dec. 28.
The pre-construction meeting for Phase III of the Hall D (Civil) construction contract was held on Dec. 20. Phase III includes the connection to the existing accelerator tunnel at the northeast stub. Onsite work will begin with the start of the scheduled accelerator shutdown in May 2011.
The contract for the North and South Access low-conductivity water (LCW) upgrades was awarded in December, and the pre-construction meeting was held on Jan. 5.
In Hall C, major repairs to the Qtor magnet power supply were completed in December, restoring magnet operation, although some reliability issues remained. Further minor repairs in January have restored the power supply to reliable operation. Modifications to the Q-weak target eliminated a small helium leak, and the target was cooled down in the first week of January. Q-weak has resumed data taking, starting with low-current tracking mode calibration runs and to be followed by high-current production running this week.
APS April Meeting Abstracts Due Friday
Nominations for Outstanding Nuclear Physicist Award Due Friday
AIP Congressional Fellowship Program Applications Due Saturday
After the holiday break, the accelerator was successfully restored in four days. Hall B and Hall C started to take continuous wave beam on swing shift of Jan. 6. Hall A is down due to installation of a new experiment. The injector gun high-voltage (130 kilovolt) power supply failed at the end of the winter run. The injector gun is currently operating at 100 kV.
Installation of improved ultraviolet optics was the primary focus of the first week back after the holidays. The FEL team continued preparations for the U.S. Particle Accelerator School to be held in Hampton Jan. 17-28. This week, the team will exercise the systems and do dry runs.
Theoretical and Computational Physics
A new paper <arXiv:1101.1011> by Theory Center staff and physicists in Italy studies semi-inclusive deep inelastic scattering (SIDIS) within a generalized parton model approach, taking into account the transverse motion of quarks and assuming factorization. Complete formulas for single- and double-spin asymmetries are derived, and expressions for asymmetries are presented using simplified Gaussian parametrizations of transverse momentum dependent distributions. These will be useful for phenomenological studies and analysis of future SIDIS data from JLab.
Young Scientist Prize - Computational Physics
Engineering Division Professional Development Program
The first set of eight seminars will be devoted to Cryogenics and presented by the lab's award-winning staff, Jan. 25-April 26. Two overview sessions are open to all lab staff, representatives from local industry and graduate engineering students who have a professional interest in the topic; overview sessions will be held at Jefferson Lab in the CEBAF Center auditorium. Six technical presentations are for engineers, senior/mid-level technicians and graduate engineering students; technical sessions will be held in CEBAF Center, Room F113. Eight Continuing Education Units will be granted by the Virginia State Licensing Board to professional engineers who complete the cryogenics series. Space is limited and advanced reservations are required for all sessions.
Facilities Management and Logistics
With the shorter hours of winter days upon us, drivers must consider how the sun’s low position in the sky impairs vision, even at JLab.
Most employees and users leave the lab near 5 p.m., which is currently at sunset and the onset of twilight. During the twilight period, the eyes are slowly transiting from daylight color vision to black and white night vision, so vision is not optimized for either. It has been reported that, in general, a person aged 60-plus has significantly less measurable night vision than a 20 year old.
Computing and Networking Infrastructure
Computer User Audit Is Underway
JLab_guest Wireless Changes On the Way
American Red Cross Blood Drive
Canine Good Citizen/Therapy Dog International Training at JLab
Last Chance to Complete IT Division Survey
E-Verify Processing - Are You Finished?
For more information on E-Verify, visit the Human Resources E-verify webpage. If you believe you might have deleted the two e-mails from PERFECTCOMPLIANCE.COM in error, contact Sue Ewing at x7687. If you have questions about the I-9 or E-verify process, contact Sue Ewing or Rhonda Barbosa.
JSA/JLab Graduate Fellowship Program
JSA/JLab Sabbatical Support Program
JLab Calendar of Events
Jan. 10-14: PAC 37