JLab Weekly
Briefs
is an ongoing publication providing information on the status of
safety, accelerator operations, experiments, free-electron laser,
reviews, upcoming activities and special events. Deadline for
submission is every Tuesday by 10 a.m. Submit new items to: Public Affairs or contact Kandice
Carter at x7263.
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Jefferson Lab Weekly Briefs
June 3, 2009
12 GeV Upgrade
The 12 GeV Upgrade Project has awarded a contract for the 4-meter
dipole magnets to be used in the arc 10 beamline and the beamline to
Hall D. In addition, the responses to the requests for the Best and
Final Offers have been received for the beamline quadrupole magnet
fabrication. Technical evaluation of the final submittals for the
superconducting radiofrequency cavity fabrication contract has been
completed. A design and safety review of the low-level RF controls was
held on May 21; the review committee’s comments were positive.
Physics
In Hall A, production running for experiment E05-102, Measuring the
Transverse Asymmetries in the 3He (e,e'd) Reaction, has been proceeding
very smoothly.
The eg1-dvcs run is running smoothly, with the polarized target
operating without problems in Hall B. The lost time, due to mechanical
damage of the target during the first week, has been partially
recovered. Hall B is at about 85 percent of its planned scenario at
this time during the run. If things continue this way, the goal for
this run should be achieved by the end of the run on June 13.
In Hall C, installation of the hypernuclear experiment continues with
the High Resolution Kaon Spectrometer and the High Resolution Electron
Spectrometer aligned into their final positions (including the tilt of
the HES). The stand for the splitter magnet is in place and ready for
splitter installation. The walls of the spectrometer shielding bunkers
are mostly in place, and the personnel access platforms for both
spectrometers are in place. Installation of detectors has started. The
HKS wire chambers are installed and aligned.
Accelerator
The accelerator is running well, and Halls A & B received more than
170 hours of beam. There were two minor magnet problems, one with
MARC1A, which was quickly fixed. The other problem was with the shunt
magnet MYRAT03, which required a control module to be replaced. This
period was marked overall by very smooth beam delivery to the two halls.
Free-Electron Laser (FEL)
Repairs to the low-conductivity water system were finished, and the
system is being brought back into operation. FEL staffers provided
first beam on Friday and will try to re-establish the robust and stable
operation achieved before the lcw system failure. Staffers also held an
external review of plans for a soft X-ray FEL. The ideas were well
received, and a number of actions were identified to prepare a
proposal for submission to DOE in September.
Theory Center
The leading-twist pion distribution amplitude (DA) describes the
sharing (in fractions x and 1-x) of the total momentum of a fast-moving
pion, when the pion is just a quark-antiquark pair. A possibility is
investigated in <arXiv:0906.0323
[hep-ph]> that the pion DA is constant for all values of x. Such
a model is shown to reproduce the recent large-Q2 BaBar data
on the photon-pion transition form factor, considered the simplest
observable to extract the pion DA, and can be used in the future to
calculate other processes.
JLab's Safety Numbers
149 Days since Last Recordable Accident (JLab record:
331)
266 Days since Last Lost Workday Accident (JLab record: 676)
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Environment, Safety, Health & Quality
With the weather starting to turn warmer, many of us are starting
another year of yard work. The American Society of Hand Therapists
suggests some basic gardening safety practices. It is important to
remember that yard/gardening activities involve many repetitive tasks
such as raking, weeding, digging and pruning. You can help avoid
injuries by following these safety tips:
- Always wear gloves: The soil is full of bacteria and
fungus that could cause an infection in a small irritation or cut in
your skin;
- Keep you arms covered, too. Coverage protects you
against the sun, poison ivy, and other small residents (rodents or
spiders) of your garden or yard;
- Use wide-handled, lightweight tools. Tools with
padded or thicker handles protect the smaller joints in your hands;
- Take a break about every hour or switch to another
activity. Repetitive motions, such as digging, can cause tendonitis of
the elbow or lead to carpal tunnel syndrome;
- Use tools to dig in new areas. Buried sharp objects
can cut or puncture your skin;
- Avoid the habit of sitting back on your knees.
Bending your knees this far is a hard position for the knee joints.
Instead, use a short gardening stool or bench;
- Plan you activities. Consider using a small cart or
wagon to carry supplies; some even provide convenient seating. Always
put tools away to prevent anyone from tripping over them.
During April, JLab’s Quality Assurance Program was assessed by a team
of four DOE representatives. The objective of this review was to
evaluate how well JSA has implemented the Quality Assurance Program, in
accordance with the Quality Assurance Order, DOE O 414.1C, which is
part of the JSA management and operating contract. The review concluded
that eight of the 10 criteria evaluated were met, and two criteria were
partially met. The program was found to be programmatically compliant.
The outcome represents a significant milestone and progress toward
successful implementation of the JSA-JLab QA Program. A broad spectrum
of JLab personnel were involved in this assessment and are commended
for their participation and involvement.
Announcements
JLab Emergency Backup Website Reminder
JLab has an emergency website that will be used in the event that its
website, www.jlab.org, is shut down due to an emergency. The emergency
website is hosted offsite and can be found at: status.jlab.org. The
website, which is still in the development stages, will be used to post
important information for Users and staff during a local or regional
emergency. Please save and remember this address.
Specialty Gases Lab Truck
Visit
On
Thursday, 9:30 a.m. to 1:45 p.m., GTS-Welco will have its mobile lab
truck for specialty gases onsite in the Test Lab parking lot. All
employees interested are welcome to tour the mobile lab and talk with
the representative to receive information on the latest developments in
special gas delivery systems and cryogenics.
Trailer #35 Has Moved
The home of the Industrial Hygiene Group, Trailer #35, has been moved
to a new location on the accelerator site behind Hall B. For questions
or concerns, contact Jennifer Williams at x7882 or Dick Owen at x6381.
Timely Timesheets Aid
Salary Adjustment
Process
In order for Payroll to begin processing the salary adjustments, it is
imperative that employee timesheets for the June 1-15
timesheet period be completed and received in Finance by the set
deadlines. Employee timesheets are always due at the end of the
employee's last work day of the timesheet period. If employees are
absent, supervisors are responsible for completing the employees'
timesheets by this same deadline. Supervisor and project manager
approvals on the timesheets are always due no later than 2 p.m. on the
first work day following the last day of the timesheet
period.
Watch for Construction
Traffic Entering/Exiting JLab
Construction traffic is using Hogan and the access road on the east
side of the Residence Facility to access the Hall D construction area.
Please be alert to slow-moving or oversized construction vehicles
moving in and out of the area. Use caution when driving through the
intersection of Hogan and Rattley Road just east of the Residence
Facility. Please obey all traffic signs.
JLab Calendar of Events
June 1-19: HUGS
2009
June 2-4: 53nd Annual
Materials Management Workshop
June 8-10: Users
Group Workshop and Annual Meeting
June 17: JLab Colloquium and Public Lecture, CC auditorium, 4 p.m.
July 1: Due
date for several physics award applications
July 3: JLab closed for Independence Day
Summer Education Calendar
June 1-19: HUGS 2009 - Hampton University Graduate Students
May 26-July 31: SULI - Science Undergraduate Laboratory Internship
May 26 - July 31: REU - Research Experience for Undergraduates
June 18 - July 31: HSSHP - High School Summer Honors Program
July 7 - 31: DOE ACTS - Academies Creating Teacher Scientists
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