12 GeV Upgrade
The design effort on the conventional facilities to support the 12 GeV
CEBAF Upgrade is near completion. JLab Facilities & Logistics
personnel are incorporating design review comments for the FY10 and
FY11 procurements and completing the design of an FY12 procurement. The
focus has turned to preparations for the Department of Energy, Director
of Project Assessment Independent Project Review (IPR) of the 12 GeV
Continuous Electron Beam Accelerator Facility (CEBAF) Upgrade Project
scheduled for July 22-24 and the acquisition of the FY09 procurements.
The Hall D Complex Selection Committee convened this week and started
the evaluation of construction contractors’ qualification
proposals. The commissioning plans consisting of the functional
performance checklists for the Hall D Complex and CHL Addition are
complete.
Accelerator
A site-wide power event that occurred on Sunday was caused by a
temporary
failure of Dominion Power gear. This resulted in a loss of power
to many pieces of equipment onsite, causing the equipment to trip
breakers (including the 40MVA substation and the 4160V transformer that
supplies the cryogenics equipment). Numerous staff members
worked diligently on Monday (June 23) to bring all of the equipment
back online. In the injector, Gun 3 was reconditioned.
Substation planned maintenance continued around the site, as each
substation was shut down, maintenance work performed, and the unit
brought back into service. The Central Helium Liquefier is now
completely
off the Main Cold Box, with the Standby Refrigerator taking its place
online.
FEL
Progress is being made on reassembling the FEL gun, and a mild
bake on the gun test stand is proceeding to reduce background water so
as to improve quantum efficiency (QE) lifetime. Several user labs have
been certified for
laser ops and training, and certification for the new Laser Personnel
Protection System is proceeding. FEL staff began mounting magnet
girders for the amplifier/ultraviolet leg.
Theory
Properties of bound
nucleons (deep inelastic structure functions, elastic form factors,
etc.) are modified by the nuclear medium. Using the results of the
Quark-Meson Coupling model, which predicts these modifications, and
assuming that the bound nucleon generalized parton distributions are
modified in proportion to the corresponding bound nucleon elastic form
factors, a new approach was developed by Theory Center staff
(arXiv:0806.3288 [hep-ph])
to calculate the effect of medium
modifications on observables measured in deeply virtual Compton
scattering (DVCS). As an example, incoherent DVCS on 4He is
studied
in the 4He(e,e'γp)X reaction, which will be measured
in
the near future at JLab, and predictions are made for the
pattern of the xB- and t-dependence of the ratio of the
bound to
free proton beam-spin asymmetries, ALUp*(φ)/ALUp(φ).
JLab's Safety Numbers
254 Days since Last Recordable Accident (JLab record:
319)
599 Days since Last Lost Workday Accident (JLab record: 599)
JLab Calendar of Events
June
30-July 2: Science & Technology Review
July 4: Independence
Day Holiday (JLab closed)
July 8-10: DOE ES&H Inspection - Report Validation and Closeout
July 10-11: Teacher-to-Teacher Workshop at JLab
July 14-19: Lattice
2008
July 22-24: DOE Office of Science OPA Independent Project Review of the
12 GeV CEBAF Upgrade Project
July 22-25: Thin Film -
Superconducting Radiofrequency Technology Workshop
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Environment, Safety, Health & Quality
There are about 140,000 disabling eye injuries every year from
work-related causes. Most of these injuries, as many as 90 percent,
were
easily preventable. Proper eye protection, worn correctly, is all
that's needed to protect eyes from many hazards. Here are a few good
tips regarding eye protection:
- If something can poke you in the eye, splash into it,
fall or be hurled into it, you need eye protection.
- Observe mandatory eye-protection rules whether you
are performing or observing the task.
- Select eye protection that's appropriate for the
hazard; make sure it provides a good barrier.
- Replace eye protection when it's damaged. Chips or
scratches deep
enough to feel with your fingernail have compromised the strength of
the lens.
An article about how eye protection saved one JLab employee's eyesight
can be found in the JLab
OnTarget newsletter.
Computing
and Networking Infrastructure
Networking Changes in
CEBAF Center
This summer, the CEBAF Center network is
being changed to allow network ports to automatically recognize
registered computers when they are connected. Users of unregistered
computers may need to contact the HelpDesk
for assistance on the day the changes go into effect in your area.
Here is the schedule
for upcoming changes:
- Tuesday July 8: CEBAF Center F Wing 2nd floor
- Tuesday July 15: CEBAF Center F Wing 1st and 3rd
floors
- Tuesday July 22: CEBAF Center C Wing
- Tuesday July 29: The rest of CEBAF Center, including
Wings A and B
Individual machines may be registered here
at any time by using a web browser on that machine. If you are unsure
about your machine registration, it is fine to register again. Please
contact the HelpDesk, x7155,
about other registration-related queries.
Another Phishing Scam
Once again, JLab was the target of a
phishing attack. As you know, a phishing attack is usually an e-mail
sent to JLab e-mail account holders requesting confidential
information, such as usernames and passwords, to be provided via e-mail
or a separate web page. Be aware that the Computer Center will never
require you to send your password via e-mail. If you have any doubts
about a request received by e-mail, please contact the HelpDesk to make sure it is valid
before submitting any confidential information.
Announcements
Summer TLD Change Out is
Friday
The semi-annual TLD
change out for all badge racks will take place after 5 p.m. on Friday,
June 27. If you have a JLab radiation badge, be sure to place your
badge in its designated badge rack slot before you leave work on
Friday. Please be aware that RadCon is switching to a different
dosimeter supplier. Your dosimeter will look different, but it will
still collect the same data as before. All current dosimeters must be
collected as soon as possible, starting on Friday, June 27. If you have
questions, contact Becky Mosbrucker, x7236.
JSA Initiatives Fund
Website Update
The JSA Initiatives Fund
website
has been updated. JSA partners – the Southeastern Universities Research
Association and Computer Sciences Corporation/Applied Technologies
Division – established the JSA Initiatives Fund to support programs,
initiatives and activities that further the scientific outreach, and
promote the science, education and technology missions of Jefferson Lab
in ways that complement its basic and applied research focus.
Initiatives Fund awards are for those projects that benefit the JLab
user community and leverage the commitments of others.
Red Cross Accepting
Donations for Flood Relief
The American Red
Cross is asking for donations to continue its flood relief efforts for
those hardest hit in the Midwest. Donations may be made directly to the
Red Cross on its website.
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