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 12, 2009
12 GeV Upgrade
The first components for the upgrade of the accelerator have been
received; they will be used in the instrument air system of the
upgraded cryogenics plant. The order has been placed for components to
be used in the controllers for the stepper motors that will adjust the
resonant frequencies of the accelerating cavities. Responses to the
Request for Proposals (RFP’s) for cryomodule cold tuners, vacuum
vessels and space frames are under evaluation. Similarly, the RFP
responses for the isolators to be used in the radiofrequency system
(RF) are
being evaluated. Responses to the Request for Information have been
received for the warm compressors to be used in the cryogenics system
upgrade.
Accelerator
The Scheduled Accelerator Down is wrapping up. The Personnel Safety
System certification was completed, with a few things identified. An RF
module C50-9 was installed at 1L04.
High-current, continuous-wave beam (199 microAmps) was set up to the
injector
inline dump over the weekend.
Free-Electron Laser
The FEL ran well all last week. Staffers exposed surrogate out-coupler
mirrors to 1.06 micron fundamental and harmonic radiation; the
transmitted and reflected power was recorded as a function of time for
several irradiances. These mirrors were produced by Carmen Menoni
and her team at Colorado State University under a Joint Technology
Office-Multidisciplinary Research Initiative contract. The Gun Test
Stand gun is being high-voltage processed with krypton gas. Preliminary
results at 200 kV show improvement in processing the field emitter. FEL
staffers
successfully certified the Laser Personnel Safety System in user lab 6,
so that beam can be brought into the lab to test stability of delivery.
Theory Center
Quark and gluon propagation and hadronization in the nuclear medium
provides an experimental probe of the dynamics of color confinement,
which forbids a quark or gluon appearing in the final state of a
scattering experiment. A comprehensive review article
<arXiv:0907.3534 [nucl-th]>
outlines recent experimental and theoretical progress in the study of
the nuclear modification of parton propagation and hadron production.
It covers, in a unified way, high-energy deep inelastic lepton-nucleus
scattering, proton-nucleus and heavy-ion collisions, as well as
Drell-Yan processes in hadron-nucleus collisions, and provides a
preview of new facilities and experiments.
JLab's Safety Numbers
28 Days since Last Recordable Accident (JLab record:
331)
336 Days since Last Lost Workday Accident (JLab record: 676)
JLab Calendar of Events
Aug.
13: Amazing
Caves in 3D lunchtime presentation
Aug. 18: Identity Theft presentation
Aug. 19: Jefferson Activities Group Luau
Aug. 19-21: GPUs for Lattice QCD Workshop
Aug. 27: Safety
Shoe Vendor onsite
Sept. 7: Labor Day holiday
Sept. 17: JSA's
Electronic Commerce Vendor Show
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Environment, Safety, Health & Quality
Since mid-June,
there have been four reported insect stings
at JLab. Although seemingly minor, these types of events are
painful, and, if you're allergic, could cause a problematic reaction.
The stings have occurred at various locations
across the site, mostly in the fenced area. The main
concentration of wasps and bees is in the wildflower areas behind the
accelerator service buildings. These areas are near roadways and
walking paths, thus stinging
insects may be encountered more frequently. Regardless of where
you are, stings may be prevented with the following basic
information:
- Remove colas or drinks from golf carts and ensure any
sticky food or drink residue is cleaned off of carts.
- Avoid wearing perfumes and scented lotions. Floral
scents can attract stinging insects.
- Avoid wearing bright clothing or jewelry if possible.
- Wear a hat if you'll be working in a fielded
area. Bees are in a heightened state of readiness when they are
close to hair or fur due to their protective nature.
- Move slowly away from a stinging insect that is
bothering you. Rapid movement can provoke a sting.
If you are stung by an insect during normal business hours, report
immediately to Occupational Medicine for treatment. If onsite after
normal business hours, immediately apply ice and then clean the area
with soap and water. Ensure the incident is reported to Occupational
Medicine the next business day. Additionally, if you are stung onsite
after hours and have a known history of serious allergic reactions,
seek care at an emergency clinic.
Computing and
Networking Infrastructure
Sprint Cell Phone Coverage Extended
Sprint cell phone coverage has been extended into all three of the
experimental halls. Anyone with a Sprint cell phone can now send and
receive phone calls while in any of the experimental halls.
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
Amazing
Caves in 3D
This Thursday, August 13, Peter and Ann Bosted will provide noon-hour
3D photographic infotainment in the CEBAF Center auditorium. Come join
the fun as they share their 30-year passion for cave exploring, mapping
and photography starting at noon and lasting for about 45 minutes.
Three image shows set to music will be presented (each one about 8
minutes long), featuring Mammoth Cave (the longest in the world), the
colorful lava caves of Hawaii, and the giant Lechuguilla Cave in New
Mexico, generally considered as one of the most spectacularly decorated
caves in the world. A brief introduction will be given to each show,
and there will be time for questions at the end. 3D glasses will be
provided. Please eat lunch before or after the shows (food is not
allowed in the auditorium), and please enter the auditorium only
through the ground level door, when it will be opened between each show
for latecomers. For more information, e-mail
or call Peter Bosted at x5851.
Identity Theft: What Is It
and How Can We Protect Ourselves?
Alex J. Turner, FBI special agent in charge of the Norfolk Division,
will give a seminar on how you can protect yourself and your family
from identity theft at 2 p.m. on Tuesday, Aug. 18, in the CEBAF
Center auditorium.
JAG Luau Set for Wednesday,
Aug. 19
Plans are in full swing for the lab's summer luau. The free event, open
to all lab employees and their families, users and students, will be
from 3-6 p.m. on Wednesday, Aug. 19, on the lawn behind the Residence
Facility. Refreshments will include summer favorites: hamburgers,
hotdogs, chips, side dishes, cold beverages, and special treats.
Activities planned for the afternoon include a Hawaiian shirt contest,
slip & slide, bean bag toss, limbo, hula hoop contest and
tug-o-war. The luau is geared toward families, but adults will be able
to join in on the fun as well.
The success of JAG-sponsored events depends on everyone's
participation. Volunteering just one hour of your time to assist with
set up, or help with an activity or event, or clean up, will go a long
way toward making this event a success. JAG needs volunteers to help
with a variety of tasks. Volunteer today!
Call for Papers for the
International Symposium on Hydrogen in Matter
The Third International Symposium on Hydrogen in Matter will take place
Dec. 13-16 at the Indian Institute of Technology Madras, Chennai,
India. Symposium sponsors have announced an Aug. 31 deadline for
submitting abstracts. Abstract selections will be made on Sept. 15.
Selected full-length papers will need to be submitted by Oct. 30. For
more information, see the ISOHIM-2009
website or posters around the JLab campus.
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