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 24, 2008
12 GeV Upgrade
The CLAS12 drift chambers in Hall B are designed to provide high
tracking accuracy, while maintaining high-rate capability and large
acceptance. This necessitates small drift cells and very thin endplates
with low-profile onboard electronics and cables. A full-scale prototype
of a region-1 chamber was built, strung and instrumented as a joint
JLab & Old Dominion University project. As a result, the
construction technique was validated, and the board and cable mounting
schemes were refined. Electrostatic deflections of wire positions were
insignificant.
The Forward Drift Chambers (FDCs) in Hall D provide the necessary
tracking of charged particles traveling in the forward direction
through the GlueX apparatus. The test wire winding on four FDC
composite wire frames has been completed at the Indiana University
Cyclotron Facility. The test results indicate that the composite wire
frame design meets all structural requirements and validates that the
required precise tolerances for relative position distribution and wire
tension can be met. Valuable lessons were learned to improve on FDC
construction.
Physics
In Hall A, installation of the polarized helium-3 target is proceeding
smoothly. The assembly of the polarized target proper has been started
with the oven now in position. The installation of the new electron
detector for the Compton polarimeter, designed by the University of
Clermont-Ferrand, has been completed, and the beamline is back under
vacuum. The BigBite detector system has been installed in place and
surveyed. The cooldown of both High Resolution Spectrometers (HRS) is
underway, with the left one on cold return and the right one to follow
as soon as the cooldown of the left has been completed.
In Hall B, the cooldown of the Torus magnet began on Sept. 18 and is
expected to continue for 10-12 days. After that, the Saclay Solenoid
magnet will be cooled down. The Cerenkov counter has been closed up
again and leak tested, waiting for a final testing of the new lifting
fixture for installation in CLAS. The inner calorimeter needed for the
E1-DVCS run has been moved to the Hall for final preparations.
In preparation for the Spin Asymmetries of the Nucleon Experiment
(SANE) in Hall C, the polarized target girder and the polarized target
service platform have been installed. A detector shielding wall has
been installed near the target. The polarized target has been moved
into the hall and is being readied for installation.
Accelerator
The unit substation LN1 rebuilt transformer was delivered and then
installed with the help of a crane. After the electrical connections
were made, LN1 was powered successfully. The warmup of Cryomodule SL05
was begun. Turbines on the Central Helium Liquefier Main Cold Box were
re-started after the replacement of compressor C-6’s main shaft seal.
Personnel Safety System certification of RF (radiofrequncy) and box
supplies continued.
Free-Electron Laser (FEL)
The FEL is being prepared for startup of operations. The advanced drive
laser is ready, the SRF (superconducting radiofrequency) cooldown
started, and the gun high-voltage processing is underway.
Theory Center
A recent Theory Center paper (arXiv:0809.2582 [hep-ph]),
featuring a collaborative effort with an Old Dominion University
undergraduate supported by the JSA RIFA (Research Internship for
Foreign Undergraduates) program, considers how the results of lattice
QCD calculations of charmonium can be reconciled with successful
non-relativistic potential models. It provides a bound-state model
description of lattice data that indicates, for example, "hybrid"
states, which require excited gluonic fields in their structure - a
suggestion that is becoming increasingly relevant experimentally with
observations of states like the Y(4260). The light-quark analogs of
these states form the principal focus of the GlueX experiment.
Engineering
The Safety Systems group completed the functional certification of the
CEBAF accelerator, an important step required for upcoming operations.
Functional certification involves verifying that the PSS can shut off
hazardous equipment if needed.
The alignment and metrology group completed the transfer of the CEBAF
accelerator coordinate control to the new surface monuments. The
coordinate system in the main accelerator is required for the
construction of Hall D. Preliminary reduction of the data, at 1 sigma,
show errors of less than 0.5 millimeters over the length of the
accelerator linacs, or an error of 1.2 parts per million.
JLab's Safety Numbers
14 Days since Last Recordable Accident (JLab record:
331)
14 Days since Last Lost Workday Accident (JLab record: 676)
JLab Calendar of Events
Sept.
25: JSA's Electronic Commerce Vendor Show
Oct. 1-4: Workshop on
Sources of Polarized Electrons and High Brightness Electron Beams
(PESP2008)
Oct. 7: American
Red Cross Blood Drive
Oct. 13-15: Electromagnetic
N-N* Transition Form Factors Workshop
Oct. 14: Science
Series Lecture: Fun with Astronomy
Nov. 27-28: Thanksgiving holidays - JLab closed
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Environment, Safety, Health & Quality
The Quality Assurance and Continuous Improvement organization is in the
process of transmitting a series of procedures to a variety of site
personnel for required reading and/or general QA/CI program awareness.
The organization is working with Division Safety Officers to determine
a list of who should read and understand such procedures. In addition,
QA/CI organization personnel are beginning a series of quality and
safety minute presentations for MCC, FEL, SRF, and other weekly
meetings to educate and/or demonstrate the procedures, processes,
systems and tools expected to be a part of the site-wide QA/CI
programs. If you have any questions about the JSA QA/CI program, feel
free to contact Bruce Lenzer, QA/CI Manager, x7586.
Records Management for Individuals
Any document that you create that could be considered evidence of our
organization, functions, policies, decisions, procedures or operations
is considered a "record." There are certain instances in which the
records must be managed, which includes retention and disposal
requirements. A new QA procedure describes how individuals at JLab
manage the records they create or receive during their JLab activities.
If you create a JLab record, you can read the procedure at Records
Management for Individuals - Procedure for information or speak to
your Divisional Record Coordinator.
Beware of Poisonous
Spiders Onsite
JLab is in a natural setting, and as such, we interact with all types
of wildlife. Most of this wildlife will typically not enter buildings.
However, sometimes spiders will seek dry, dark areas; therefore, we
need to be aware of the hazards and implement the proper controls.
Further details can be found linked off of Insight.
Computing and
Networking Infrastructure (CNI)
CEBAF Center Wings A&B
Network Outage
The network in CEBAF Center wings A&B will be unavaliable for
several hours on Monday evening, Sept. 29 starting at 5 p.m. The
network switches are being upgraded to support automatic VLan
assignment. Please visit http://reggie.jlab.org
to ensure that your machine(s) are registered. If you are still
offline on Tuesday, Sept. 30, contact the HelpDesk at x7155.
JLab Computer Purchasing
Policy
JLab is committed to reducing its energy consumption and purchasing
more environmentally friendly products. To help achieve these goals,
all new computer purchases must meet the minimum requirements of the
Silver tier rating of the Electronic Product Environmental Assessment
Tool. During the coming month, JLab's CNI group will publish a
standardized list of computing systems for lab personnel that meet the
requirements defined by EPEAT for Silver tier systems. This list will
provide a variety of system specifications that have been loosely
configured to meet the various categories of work (CAD/Engineering,
Physics, Administration, Software Development, etc.) performed at JLab.
In addition to meeting the emerging requirements for energy efficiency,
reusability and recyclability as defined in new and existing DOE
requirements, the list also will ensure that systems purchased for JLab
work are appropriate for the work performed.
A purchasing policy will be released October 1 that further explains
how this program will be implemented in the future. Additional
information on EPEAT can be found at: http://www.epeat.net/.
For now, those wanting to procure a new desktop system can submit a
CCPR stating who the system is for, how it will be used and what
Project and Org to use for the purchase. The CNI group will submit a
requisition for the appropriate system on their behalf.
P2P Software Not Allowed
on JLab Network
The CNI group reminds computer users that JLab's
cybersecurity policy prohibits the use of Peer-to-Peer (P2P) software
on Lab systems or networks. Common examples of prohibited P2P software
include BitTorrent, LimeWire, Gnutella, TVAnts, eDonkey, Azureus/Vuze,
FlashGet, uTorrent, and many others. The only P2P application currently
allowed on JLab networks is Skype, as long as JLab's Skype
configuration guidelines are followed (see below).
Effective immediately, systems participating in prohibited P2P traffic
will be automatically blocked from the JLab network for one hour. At
the end of the hour, the ban will automatically be lifted and normal
network access will resume if the P2P activity has stopped. This is a
change from the current procedure, which requires the user to contact
the HelpDesk and have the ban lifted manually. This change should help
users who get blocked during weekends, holidays and other times when
the HelpDesk is closed.
For more information about JLab's P2P policies, visit the following
links:
DOE
TMR-18 Peer-to-Peer (P2P) Networking
Jefferson
Lab Skype Usage Policy
Tips on Skype
Configuration
Announcements
JSA Electronic Commerce
Vendor Show
The entire JLab community is invited to the annual JSA Electronic Commerce
Vendor Show tomorrow (Thursday, Sept. 25) from 9 a.m.–2 p.m. in
the CEBAF Center atrium and room F113. Come meet the many vendors and
manufacturers that will be showing off their products and answering
your questions. Enjoy give-aways, free samples and refreshments. For
additional information, contact Renee Carter at x7954 or carter@jlab.org.
Blood Drive Set for
October 7
The next American Red Cross Blood Drive is scheduled for Tuesday, Oct.
7, from 10 a.m. to 4 p.m. in CEBAF Center F113. New and repeat donors
are encouraged to attend. Appointments and walk-ins are welcome.
Contact Johnie Banks at x7539 or jbanks@jlab.org
to schedule an appointment or to volunteer.
$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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