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
September 17, 2008
12 GeV Upgrade
The Beam Transport team completed the measurements on the prototype
beamline quadrupole magnets. Final design decisions have been made
based on the results. The Request For Proposals (RFP) was released for
the beam transport quadrupole contract.
Accelerator
Good News! The rebuilt transformer for LN1 is due to be delivered
Wednesday, Sept. 17. A tour was conducted for the guests from the
International Linear Collider. The dismantling and removal of the
Northeast stub equipment and fixtures is going well. Cement bases for
surface monuments to be used for alignment of the Hall D infrastructure
were installed. The long process of cooling down the End Station
Refrigerator and the Central Helium Liquefier began as the accelerator
started preparations for beam delivery in a few weeks.
Free-Electron Laser (FEL)
FEL staff members continue to prepare for bringing the FEL up with a
final mild water bakeout of the gun. The optics transport control
system and the final checkout of the drive laser is nearing completion.
A clean pumping on the cryomodules is underway in preparation for
cooldown in two weeks.
Engineering
The EESIC group (Electrical Engineering Support/Instrument &
Control) reports that CAMAC to VME conversion of W5 is in the final
stages of hardware and software testing. The 2 Kilowatt beam dumps
and viewers are the only remaining systems to convert. These will be
completed in FY09 due to software priorities and design issues. The
4-Channel to switched electrode electronics (SEE) type beam position
monitor (BPM) conversion has been completed successfully. W1 and W3
system conversions are being budgeted for FY09. The Survey and
Alignment group has transferred the main accelerator's survey system to
the ground surface and is in the process of densifying a new network in
support of the Hall D construction. This work has to be completed
during this year's summer shutdown, as access to the main accelerator
later in the year will not be possible. The desired final accuracy
between the existing survey network and the new hall must be less than
1 millimeter.
JLab's Safety Numbers
7
Days since Last Recordable Accident (JLab record:
331)
7 Days since Last Lost Workday Accident (JLab record: 676)
JLab Calendar of Events
Sept.
17: JLab
Colloquium and Public Lecture: Guesstimation
Sept. 25: JSA's Electronic Commerce Vendor Show, 9 a.m.-2 p.m.
Oct. 1-4: Workshop on
Sources of Polarized Electrons and High Brightness Electron Beams
(PESP2008)
Oct. 13-15: Electromagnetic
N-N* Transition Form Factors Workshop
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Environment, Safety, Health & Quality
Recently, an attachment cord that was wired incorrectly led to a
potential safety incident. A VC-4000 voltage converter was being used
during troubleshooting operations, when it was discovered that the hot
and neutral cord connections at the back of the unit were reversed (see
picture). This effectively bypassed the on-off switch, allowing voltage
to be present at the front connections (output) of the unit even when
the unit was switched off. Technicians realized the severity of the
issue when a spark was seen, and the technicians immediately secured
the system. No one was injured.
If you use a voltage converter in your work area, now is a good time to
check that the connections were made correctly. Additionally, remember
that all electrical work should be done at the lowest possible energy
state. If you have questions or if any additional situations are found,
contact Todd Kujawa at x7006.
Please also take this opportunity to review work control documents for
applicable situations, analyze the hazards and then develop and
implement the appropriate hazard controls.
Shield Block Move Lesson Learned
During a shielding block movement in Hall C last week, a JLab colleague
sustained a serious finger injury. Our colleague is recovering but was
unable to work the past few days. An investigative team has been
assembled and is collecting information on the events leading up to and
possibly causing the injury, as well as a chronology of events after
the injury occurred. When appropriate, the team will work with the
injured employee to understand the event and establish safeguards for
similar work in the future.
Computing and
Networking Infrastructure (CNI)
CEBAF Center Wings A, B
& C Network Outage
A network outage is planned for CEBAF Center Wings A, B and C for
Monday, Sept. 22 at 5 p.m. The outage will allow for an upgrade of
network switches.
If your machine has not been registered, it may not be able to rejoin
the network following the upgrade. To ensure connectivity, register
your individual machines by visiting this link at any time by using a
web browser on each machine. If you are unsure about your machine
registration, it is OK to register again. If you experience problems
with your machine following the upgrade, contact the HelpDesk at x7155.
RedHat Enterprise Linux 3
After Tuesday, Sept 16, the Scientific Computing batch farm for
experimental physics will no longer include RedHat Enterprise Linux 3
systems; all batch farm computing will be on Fedora 8.
Announcements
PRL Editorial Spotlights Physics
Gene D. Sprouse, American Physical Society editor-in-chief, has penned
an editorial introducing Physics,
the American Physical Society's new web publication that offers
"expert-written commentary articles that highlight and provide context
for a select group of papers published by APS and occasionally others."
The goal is to provide more content that is accessible to physicists of
all disciplines, broadening an article's reach to those outside of the
authors' subspecialty. The editorial
is available in the current issue of Letters on the APS website.
School Tools Drive a
Success
The lab has just completed the annual School Tools drive for the United
Way, and Human Resources staff would like to extend our appreciation
for all of your support in this effort! We received eight full
boxes of school supplies from the lab community. Because of your
generosity and caring, children in our community, who may not otherwise
be able to have the school supplies they need, can start this school
year ready to succeed. Remember that if you were unable to participate
in the activity, you can still make your contributions during the
upcoming United Way campaign. More information and details will follow
soon.
$4-off Coupons for State
Fair Ride Wristband
The
State Fair of Virginia runs Sept. 25 - Oct. 5. A supply of State Fair
brochures and $4-off ride wristband coupons are currently available at
the CEBAF Center , VARC and ARC reception desks. This is the last year
that the State Fair will be held in Richmond at the Richmond
International Raceway. Next year, it will be held at its new home in
Caroline County north of Richmond on I-95.
Tee'em Up for the JLab
2008 Fall Golf Tournament!
The tournament will be held on Wednesday, Oct. 8, at the Williamsburg
Country Club in Williamsburg. The event will begin at 1 p.m. with a
shotgun start. The tournament will be a four-person Captain's Choice.
All teams will be handicapped. There must be at least two JLab
employees per team. The cost for JLab employees is $45 each, and the
cost for non-JLab employees is $60. The fee includes range balls, green
fees, cart, food (afterwards) and the prize fund.
See Danny Machie (ARC 402/09, x7501) to sign up. Golfers must list
their average score for 18 holes, and checks should be made payable to
Danny Machie. The entry deadline is Friday, Oct. 3.
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