| Number 132
||May 12, 2003
New subatomic particle
The BaBaR experiment at DOE's Stanford
Linear Accelerator Center has identified a new subatomic particle.
The new particle called the Ds (2317), which combines a charm
quark with another heavy quarkan anti strange, has unexpected
properties that will provide insight into the force that binds
the quarks together. The existence of the particle is not a surprise,
but its mass is lower than expected, which will send theorists
back to the drawing boards. A scientific
paper was sent for publication in Physical Review Letters
on April 11th 2003.
Chem/bio defense for
San Francisco International Airport
San Francisco International Airport spokesman Mike McCarron recently
praised "the wonderful relationship" with DOE's Sandia
National Laboratories that led to the first
testing of chemical and biological defense at a major international
airport. The research is an outgrowth of work with the Washington
Metro, begun in 1997 with Argonne National Laboratory, to characterize
chemical detection systems in a subway setting. That sensor system
is now entering operation at several Metro stations. The San Francisco
airport work began in DOE's Chemical and Biological National Security
Program and now continues under the Department of Homeland Security's
Science and Technology Directorate.
Oak Ridge tracks down
explosives from the air
Using state-of-the-art equipment, researchers from DOE's Oak
Ridge National Laboratory have developed several sophisticated
airborne sensor systems that can detect, characterize and digitally
map unexploded ordnanceincluding items buried as deeply
as 30 feet into the ground. These helicopter-mounted systems have
applications for the military as efforts are under way in the
Persian Gulf region to unearth and destroy mines, weapons caches
and other dangerous hidden ordnance-related materials.
[Fred Strohl, 865/574-4165;
Jefferson Lab experiment
could lead way to new class of accelerators
DOE's Jefferson Lab recently conducted
an experiment with the Continuous Electron Beam Accelerator to
determine the feasibility and effectiveness of energy-recovery
technology that could lead to a new class of particle accelerators.
With minor modifications, Jlab's accelerator became a "novel test
bed" for recirculating linacs with energy-recovery capabilities.
If results are what scientists hope for, any advances could be
applied to future energy-recovery linacs, or ERLs. Existing machines,
like Jlab's Free-Electron Laser, could benefit, as well as next-generation
devices such as ion colliders and advanced light sources. Energy
recovery is the centerpiece of a new operation mode for recirculating
linacs, where the high-energy beam returns its energy for further
acceleration of a "fresh" batch of electrons.
PNNL Finds the killer
Even the world's most powerful army can be brought down by a killer
weed. Scotch Broom, a prolific, noxious weed, which competes with
other plants, has invaded the U.S. Army's Fort Lewis military base
in Washington state and is inhibiting effective troop training.
Researchers at DOE's Pacific Northwest
National Laboratory recently completed a project where remote
sensing and target detection techniques, aided by satellite data,
were applied to build a map of the location of noxious weeds at
the base. The map will be used by crews at Fort Lewis to guide weed
eradication. Fort Lewis contains 86,000 acres of forest, prairies
and wetlands and houses more than 25,000 soldiers and civilian workers.
The installation has abundant high-quality training areas, including
115 live-fire ranges.
With six distinct physical phases, a melting point of only
1184°F, and a density approaching twice that of lead, element
number 94 is a truly puzzling substance. It's manmade in reactors,
a powerful energy source, and emotionally chargedbecause
it's the stuff that bombs are made of. As Associate Director
for Defense and Nuclear Technologies, Bruce Goodwin heads the
nuclear weapons program at Lawrence
Livermore National Laboratory. And as someone who has designed
and tested nuclear weapons, he's also a renowned expert on the
behavior in nuclear weapons of the heavy radioactive metal called
For his theoretical plutonium work, Goodwin recently received
DOE's E.O. Lawrence Award in the national security category.
Established in 1959, the award honors the late Ernest Orlando
Lawrence, inventor of the cyclotron and namesake for DOE's Lawrence
Livermore and Lawrence Berkeley
Goodwin revised equations of state for plutonium under extreme
pressuresinformation essential to the nation's stewardship
of aging nuclear weapons without full-scale nuclear testing.
"I came up with some theories for the equations of state for
plutonium under extreme conditions derived from peculiarities
I saw in nuclear test data," Goodwin said. "I was flying in
the face of 40 years of research, and even I thought it couldn't
be true." But Goodwin's ideas did prove true.
For earlier nuclear design work, Goodwin three times received
the "Award of Excellence" for Significant Contribution to the
Nuclear Weapons Program from DOE's Office of Military Application.
He also has received Aviation Week and Space Technology Magazine
Year 2000 "Aerospace Laurels Honor" for significant contributions
to the aerospace field.
An honors graduate in Physics from The City College of the
City University of New York, Goodwin earned an M.S. in Aeronautical
and Astronautical Engineering from the University of Illinois,
followed by his Ph.D. in Aeronautical and Astronautical Engineering
from the University of Illinois at Urbana-Champaign.
Submitted by DOE's Lawrence Livermore