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.
Archives
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Jefferson Lab Weekly Briefs
August 19, 2009
12 GeV Upgrade
Construction of the Hall D Barrel Calorimeter detector is underway at
the University of Regina in Saskatchewan, Canada. Production shipments
of the Kuraray scintillating fibers are arriving according to schedule,
and the first shipment of lead has been received and passed acceptance
tests. Procedures for fabrication of the first article construction
module have been finalized, and the base lead layer has been
successfully glued to the aluminum base plate.
Accelerator
The Scheduled Accelerator Down ended on Aug. 17, with a lot of work
done. Ops restored 5.97 GeV accelerator operation successfully over the
weekend. Continuous wave beam (5 μA) was established to the beam
switchyard dump. On Monday, the accelerator was scaled down to 5.764
GeV.
Free-Electron Laser
The FEL team had a successful week of operation devoted to beam
measurements and optics characterization. Staffers also did some
preparation for user runs on the Light Pseudoscalar and Scalar Search
experiment by providing alignment beam to several labs and
operating at secondary wavelengths.
Theory Center
A fully relativistic calculation of the polarized 2H(e,e'p)n reaction has
just been performed <arXiv:0907.3712
[nucl-th]> at large Q2 in the impulse approximation,
employing the Gross equation to describe the deuteron ground state and
the SAID parametrization of the full nucleon-nucleon scattering
amplitude to describe the final state interactions. The target
spin asymmetries are shown to be sensitive to the full spin structure
of the final state interaction. The results of this calculation are
being used in support of the JLab E93-009 experiment in Hall B
(EG1 run group).
JLab's Safety Numbers
35 Days since Last Recordable Accident (JLab record:
331)
343 Days since Last Lost Workday Accident (JLab record: 676)
JLab Calendar of Events
Aug. 19: Jefferson Activities Group Luau
Aug. 19-21: GPUs for Lattice QCD Workshop
Aug. 26: Colloquium
and Public Lecture
Aug. 27: Safety
Shoe Vendor onsite
Sept. 2: EAP
Seminar: Stretching Your Dollar
Sept. 7: Labor Day holiday
Sept. 17: JSA's
Electronic Commerce Vendor Show
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Environment, Safety, Health & Quality
Excessive heat
exposure caused 8,015 deaths in the U.S. from 1979-2003. More people
died from extreme heat
in this period than from hurricanes, lightning, tornadoes, floods and
earthquakes
combined.
People suffer heat-related illness when their bodies can't properly
cool themselves. The body normally cools itself
by sweating; under some conditions, sweating isn't enough. As a
person's body temperature rapidly rises, damage can occur to the brain
and other vital organs.
To protect
your health when temperatures are extremely high, remember to keep
cool, use common sense and use the following tips:
- Avoid hot foods and heavy meals—they add heat to your
body.
- Drink plenty of fluids and replace salts and minerals
in your body. Do not take salt tablets unless under medical supervision.
- Dress infants and children in cool, loose clothing
and shade their heads and faces with hats or an umbrella.
- Limit sun exposure during mid-day hours and in places
of potential severe exposure such as beaches – use sunscreen.
- Protect those at risk: keep infants and the elderly
in air-conditioned spaces; do not leave infants, children, or pets in
a parked car.
- Provide plenty of fresh water for your pets, and
leave the water in a shady area.
- Monitor those at high risk and use a buddy system
when prudent.
- Know the
symptoms of heat disorders and overexposure to the sun, and be
ready to give first aid treatment or call 911.
For more information, visit the Centers for Disease Control "Extreme
Heat" website.
Computing and
Networking Infrastructure
Helpdesk
Summer Hours
Ending
The IT Division Helpdesk will be closing in the afternoons starting on
Monday, Aug. 24. After that date, the Helpdesk will be open from
8 a.m. until noon, Monday through Friday.
Announcements
Nuclear and Particle
Physics at the Spallation Neutron Source
Dr. Geoff Greene, University of Tenn. and Oak Ridge National Lab, will
present this colloquium
and public lecture in the CEBAF Center auditorium at 4 p.m. on
Wednesday, Aug. 26.
Register for a Personal
Finance Lunchtime Seminar: Stretching Your Dollar
This bring-your-own-lunch seminar will take place in CEBAF Center room
F113, noon-1 p.m. on Wednesday, Sept. 2. It offers tips and
techniques on how to save money, no matter how much you make! It will
offer useful short and long-term savings options and insightful ideas
on how to make effective decisions about tracking and spending your
money. Make a budget and make a difference. Facilitated by Optima's
Employee Assistance Program. Registration is required due to
limited space. To sign up, contact Betty Beeler (beeler@jlab.org)
x6999 or Bruce Ullman (ullman@jlab.org) x7170.
Public Tours Briefly
Suspended
Due to the experiment schedule and a number of tours scheduled in
conjunction with upcoming reviews, Public Affairs has suspended general
and public tours for the remainder of August and the month of
September. Public tours will resume in October. Campus drive-through
tours will still be available as needed on new employee orientation
dates.
Remembering Camille 40
Years Later
Hurricane Camille was a Category 5 hurricane when it flattened the
Mississippi Gulf Coast on this day in 1969. Several days later,
although the storm had weakened to a tropical depression, it wreaked
havoc on communities in Virginia with 27 inches of rain and
contributing to 153 deaths in Virginia (256 total). The storm led to
the creation of what is now known as the Virginia Department of
Emergency Management. Read more about this natural disaster on PilotOnline.
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