The Office of Science manages a unique
and vital infrastructure for America’s scientists,
engineers, teachers and students – and also the
international community.
The Office of Science oversees 10 outstanding
national laboratories with unmatched capabilities for
solving complex interdisciplinary problems.
In addition, the Office of Science also
builds and operates large-scale user facilities of importance
to all areas of science.
These Office of Science facilities and
capabilities have produced outstanding value, technological
advances and progress on many national priorities in
scientific research. What’s more, the Office of
Science’s national research infrastructure has
enabled scientists to exploit investments made in other
fields as well.
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National Laboratories
The Office of Science is the steward of 10 national
laboratories that support the missions of its science
programs. The national laboratory system, created over
a half-century ago, represents the most comprehensive
research system of its kind in the world. These laboratories
perform research and development that is not well suited
to university or private sector research facilities
because of its scope, infrastructure, or multidisciplinary
nature, but for which there is a strong public and national
purpose.
A high level of collaboration among all
of the national laboratories in the use of world-class
scientific equipment and supercomputers, facilities,
and multidisciplinary teams of scientists increases
their collective contribution to DOE and the Nation,
making the laboratory system more valuable as a whole
than as the sum of its parts.
The Office of Science oversees these 10
national laboratories:
· Ames
Laboratory
· Argonne National
Laboratory
· Brookhaven
National Laboratory
· Fermi National
Accelerator Laboratory
· Thomas Jefferson
National Accelerator Facility
· Lawrence Berkeley
National Laboratory
· Oak Ridge
National Laboratory
· Pacific Northwest
National Laboratory
· Princeton
Plasma Physics Laboratory
· Stanford
Linear Accelerator Center
In addition, the Office of Science funds
research and development projects conducted at these
additional national laboratories, which are overseen
by other DOE offices:
· Idaho
National Engineering and Environmental Laboratory
· Lawrence Livermore
National Laboratory
· Los
Alamos National Laboratory
· National
Energy Technology Laboratory
· National Renewable
Energy Laboratory
· Sandia National
Laboratory
· Savannah
River National Laboratory
User Facilities
The Office of Science also oversees the construction
and operation of some of the Nation's most advanced
research and development user facilities, located at
these national laboratories and universities. These
state-of-the-art facilities are shared with the science
community worldwide and contain some technologies and
instrumentation that are available nowhere else. They
include particle and nuclear physics accelerators, synchrotron
light sources, neutron scattering facilities, supercomputers,
and high-speed computer networks.
For example, the National Synchrotron Light Source at
Brookhaven National Laboratory is the world's brightest
continuous source of X-rays and ultraviolet radiation
for research. The William R. Wiley Environmental Molecular
Sciences Laboratory at the Pacific Northwest National
Laboratory houses one of the world's most powerful widebore
nuclear magnetic resonance (NMR) spectrometers. The
Spallation Neutron Source, currently being built at
Oak Ridge National Laboratory, will provide the most
intense pulsed neutron beams in the world for scientific
research and industrial development.
Each year, the Office of Science facilities are used
by more than 18,000 researchers from universities, other
government agencies, and private industry.
The major user facilities supported by the Office of
Science are listed below by program office:
Advanced Scientific Computing Research
Basic Energy Sciences
Biological and Environmental Research
Fusion Energy Sciences
High Energy Physics
Nuclear Physics
Advanced
Scientific Computing Research
· Energy
Sciences Network (ESnet):
ESnet is a high-speed network serving thousands of DOE
scientists and collaborators worldwide. A pioneer in
providing high-bandwidth, reliable connections, ESnet
enables researchers at national laboratories, universities
and other institutions to communicate with each other
using the collaborative capabilities needed to address
some of the world's most important scientific challenges.
Managed and operated by the ESnet staff at Lawrence
Berkeley National Laboratory, ESnet provides direct
connections to all major DOE sites with high performance
speeds, as well as fast interconnections to more than
100 other networks. Funded principally by DOE's Office
of Science, ESnet services allow scientists to make
effective use of unique DOE research facilities and
computing resources, independent of time and geographic
location. ESnet is funded by DOE’s Office of Science,
Advanced Scientific Computing Research program to provide
network and collaboration services in support of the
agency's research missions.
· National
Energy Research Scientific Computing (NERSC) Center:
NERSC is a world leader in accelerating scientific discovery
through computation. NERSC provides high-performance
computing tools and expertise that enable computational
science of scale, in which large, interdisciplinary
teams of scientists attack fundamental problems in science
and engineering that require massive calculations and
have broad scientific and economic impacts. Leading-edge
computing platforms and services make NERSC the foremost
resource for large-scale computation within DOE's Office
of Science, Advanced Scientific Computing Research program.
Basic
Energy Sciences
Synchrotron Radiation
Light Sources
· National
Synchrotron Light Source (NSLS):
NSLS, located at Brookhaven National Laboratory in Upton,
New York, is a national user research facility funded
by DOE’s Office of Science, Basic Energy Sciences
program. The NSLS operates two electron storage rings:
an X-Ray ring and a Vacuum UltraViolet ring, which provide
intense light spanning the electromagnetic spectrum
from the infrared through x-rays. Each year over 2500
scientists from universities, industries, and government
labs perform research at the NSLS.
·
Stanford
Synchrotron Radiation Laboratory (SSRL):
SSRL is located at the Stanford Linear Accelerator Center,
operated by Stanford University for DOE. SSRL is a national
user facility that provides synchrotron radiation, a
name given to x-rays or light produced by electrons
circulating in a storage ring at nearly the speed of
light. These extremely bright x-rays can be used to
investigate various forms of matter ranging from objects
of atomic and molecular size to man-made materials with
unusual properties. The obtained information and knowledge
is of great value to society, with impact in areas such
as the environment, future technologies, health, and
national security. SSRL is primarily supported by DOE’s
Office of Science, Basic Energy Sciences and Biological
and Environmental Research programs.
·
Advanced
Light Source (ALS):
ALS at Lawrence Berkeley National Laboratory is a national
user facility that generates intense light for scientific
and technological research. As one of the world's brightest
sources of ultraviolet and soft x-ray beams—and
the world's first third-generation synchrotron light
source in its energy range—the ALS makes previously
impossible studies possible. The facility welcomes researchers
from universities, industries, and government laboratories
around the world. ALS is funded by the DOE's Office
of Science, Basic Energy Sciences program.
· Advanced
Photon Source (APS):
The Advanced Photon Source (APS) at Argonne National
Laboratory is a national synchrotron-radiation light
source research facility funded by DOE’s Office
of Science, Basic Energy Sciences program. Using high-brilliance
x-ray beams from the APS, members of the international
synchrotron-radiation research community conduct forefront
basic and applied research in the fields of material
science; biological science; physics; chemistry; environmental,
geophysical, and planetary science; and innovative x-ray
instrumentation.
High-Flux Neutron
Sources
· High
Flux Isotope Reactor (HFIR) Center for Neutron Scattering:
The HFIR Center, located at Oak Ridge National Laboratory,
is the highest flux reactor-based source of neutrons
for condensed matter research in the U.S. The Center
is a national user facility funded by DOE’s Office
of Science, Basic Energy Sciences program. Thermal and
cold neutrons produced by the HFIR are used to study
physics, chemistry, materials science, engineering,
and biology.
·
Intense
Pulsed Neutron Source (IPNS):
IPNS, located at Argonne National Laboratory, is a facility
for research on condensed matter. It is officially designated
a national collaborative research center, serving the
needs of universities, industry, and other government
laboratories. In addition to encouraging, aiding and
performing neutron scattering research, IPNS staff are
engaged in advancing pulsed neutron instrumentation,
ancillary equipment and technology, such as targets,
moderators, and detectors. The IPNS is funded by DOE’s
Office of Science, Basic Energy Sciences program.
· Los
Alamos Neutron Science Center (LANSCE):
The Manuel Lujan Jr. Neutron Scattering Center (Lujan
Center) at Los Alamos National Laboratory provides an
intense pulsed source of neutrons to a variety of spectrometers
for neutron scattering studies. The Lujan Center features
instruments for measurement of high-pressure and high-temperature
samples, strain measurement, liquid studies, and texture
measurement. The facility has a long history and extensive
experience in handling actinide samples. A 30 Tesla
magnet is also available for use with neutron scattering
to study samples in high-magnetic fields. The Lujan
Center is part of the Los Alamos Neutron Science Center
(LANSCE), which is comprised of a high-power 800-MeV
proton linear accelerator, a proton storage ring, production
targets to the Lujan Center and the Weapons Neutron
Research facility, and a variety of associated experiment
areas and spectrometers for national security research
and civilian research.
Electron Beam Microcharacterization
Centers
· Center
for Microanalysis of Materials (CMM):
The CMM is a world-class facility characterized by the
entirety of its complementary array of microstructural
and microchemical instrumentation in one location. It
places emphasis on in-situ materials science at the
atomic scale and has developed several unique instruments
permitting dynamic studies in surface, interface, and
thin film science as well as deformation processes in
aggressive environments. CMM is one of four collaborative
research centers for electron beam microcharacterization
supported by DOE’s Office of Science, Basic Energy
Sciences program.
·
Electron
Microscopy Center (EMC) for Materials Research:
EMC, located at Argonne National Laboratory, conducts
materials research using advanced microstructural characterization
methods and through the use of the microscope Intermediate
Voltage Electron Microscope. Research by EMC personnel
includes microscopy-based studies in high Tc superconducting
materials, irradiation effects in metals and semiconductors,
phase transformations, and processing-related structure
and chemistry of interfaces in thin films. EMC is one
of four collaborative research centers for electron
beam microcharacterization supported by DOE’s
Office of Science, Basic Energy Sciences program.
·
National Center
for Electron Microscopy (NCEM):
NCEM, at Lawrence Berkeley National Laboratory, maintains
world class capabilities in atomic resolution electron
microscopy. The facility features several unique instruments,
complemented by strong expertise in computer image simulation
and analysis. The center also maintains one-of-a-kind
instruments for imaging of magnetic materials, and develops
techniques and instrumentation for dynamic in-situ experimentation.
NCEM is one of four collaborative research centers for
electron beam microcharacterization supported by DOE’s
Office of Science, Basic Energy Sciences program.
· Shared
Research Equipment (SHaRE) Program:
ShaRE, located at Oak Ridge National Laboratory, is
a leading facility for the microscopy and microanalysis
of materials, with an emphasis on analytical microscopy.
ShaRE maintains a suite of analytical electron microscopes,
atom probe field ion microscopes and mechanical properties
microprobes, with particular application to the development
of alloys and structural ceramics, and the study of
interfacial segregation, radiation effects, microtexture
and residual stress. SHaRE provides a unique resource
for atom probe field ion microscopy and for the microcharacterization
of radioactive specimens on a routine basis. ShaRE is
one of four collaborative research centers for electron
beam microcharacterization supported by DOE’s
Office of Science, Basic Energy Sciences program.
Specialized Single-Purpose Centers
· Combustion
Research Facility (CRF):
CRF, located at Sandia National Laboratories, is home
to about 100 scientists, engineers, and technologists
who conduct basic and applied research focused on improving
energy efficiency and reducing emissions from the country's
energy conversion and utilization systems. The need
for a thorough and basic understanding of combustion
and combustion-related processes lies at the heart of
the research at the CRF. CRF is funded by DOE’s
Office of Science, Basic Energy Sciences program.
·
Materials
Preparation Center (MPC):
MPC at the Ames Laboratory is a DOE user facility sponsored
by DOE’s Office of Science, Basic Energy Sciences
program. MPC is recognized throughout the worldwide
research community for its unique capabilities in the
preparation, purification, and characterization of rare
earth, alkaline-earth, and refractory metal materials.
·
James
R. Macdonald Laboratory (JMRL):
JMRL at Kansas State University operates a 7-MV tandem
accelerator, a 9-MV superconducting linear accelerator
(LINAC) and a cryogenic electron beam ion source (CRYEBIS)
for the study of ion-atom collisions with highly charged
ions. The tandem can operate as a stand-alone accelerator
with six dedicated beam lines. The LINAC is operated
as a booster accelerator to the tandem. The tandem-LINAC
combination has four beam lines available. The CRYEBIS
is a stand-alone facility for studying collisions with
bare ions at low velocity. An ion-ion collision facility
using the CYREBIS and a new ECR ion source are under
development. The laboratory has a variety of experimental
apparatus for atomic physics research. These include
recoil ion sources, Auger electron spectrometers, X-ray
spectrometers, and a 45-inch-diameter scattering chamber.
The laboratory is available to users who require the
unique facilities of the laboratory for atomic collision
experiments. JMRL is funded by DOE’s Office of
Science, Basic Energy Sciences program.
·
Pulse
Radiolysis Facility:
The Pulse Radiolysis Facility within the Notre Dame
Radiation Laboratory at the University of Notre Dame
is based on a 2-100 ns electron pulse from an 8-MeV
linear accelerator. It is fully instrumented for computerized
acquisition of optical and conductivity information
on radiation chemical intermediates having lifetimes
of 5 ns and longer. An excimer laser/dye laser combination
is available for use at the pulse radiolysis facility
for double-pulse experiments involving photolysis of
radiolytic transients. Energies of ~400 mJ at 308 nm
and ~50 mJ at various near-UV and visible wavelengths
are available. This facility is funded by DOE’s
Office of Science, Basic Energy Sciences program.
Biological
and Environmental Research
·
William
R. Wiley Environmental Molecular Sciences Laboratory
(EMSL):
EMSL is a DOE national scientific user facility located
at Pacific Northwest National Laboratory, funded by
DOE’s Office of Science, Biological and Environmental
Research program. As a national scientific user facility
and a research organization, EMSL provides advanced
resources to scientists engaged in fundamental research
on the physical, chemical and biological processes that
underpin critical scientific issues, conducts fundamental
research in molecular and computational sciences to
achieve a better understanding of biological and environmental
effects associated with energy technologies—to
provide a basis for new and improved energy technologies,
and in support of DOE's other missions. EMSL also educates
scientists in the molecular and computational sciences
to meet the demanding challenges of the future.
·
Joint
Genome Institute (JGI):
JGI, established in 1997, is one of the largest and
most productive publicly funded human genome sequencing
institutes in the world. JGI was founded by three DOE
national laboratories managed by the University of California:
Lawrence Berkeley and Lawrence Livermore national laboratories,
and Los Alamos National Laboratory, funded by DOE’s
Office of Science, Biological and Environmental Research
program. JGI assumed a significant role in the effort
to determine the 3 billion letters ("base pairs")
worth of genetic text that make up the human genome
and currently conducts genome sequencing programs that
include vertebrates, fungi, plants, bacteria, and other
single-celled microbes.
·
Atmospheric
Radiation Measurement (ARM):
The ARM program maintains observation sites in the Southern
Great Plains, the Tropical Western Pacific, and the
North Slope of Alaska, gathering data on solar (incoming)
and infrared (outgoing) radiation to improve the modeling
of clouds and radiation in general circulation climate
models. This program is funded by DOE’s Office
of Science, Biological and Environmental Research program.
·
Free Air CO2
Experiment (FACE):
FACE is a climate change research program funded by
DOE’s Office of Science, Biological and Environmental
Research program. FACE technology provides a whole ecosystem
platform to study the effects of elevated atmospheric
carbon dioxide concentrations on terrestrial systems.
·
Structural
Biology Center (SBC):
SBC operates a national user facility for macromolecular
crystallography at Sector 19 of the Advanced Photon
Source at Argonne National Laboratory. The SBC makes
available to scientific community two experimental stations:
an insertion-device, 19ID, and a bending-magnet, 19BM
and a biochemistry laboratory. SBC beamlines are well
suited for a wide range of crystallographic experiments.
SBC receives support from DOE’s Office of Science,
Biological and Environmental Research program.
Fusion
Energy Sciences
· DIII-D
Tokamak Facility:
DIII-D, located at General Atomics in San Diego, California,
is the largest magnetic fusion facility in the U.S.
and is operated as a DOE national user facility. DIII-D
has been a major contributor to the world fusion program
over the past decade in areas of plasma turbulence,
energy and particle transport, electron-cyclotron plasma
heating and current drive, plasma stability, and boundary
layers physics using a “magnetic divertor”
to control the magnetic field configuration at the edge
of the plasma. DOE’s Office of Science, Fusion
Energy Sciences program is a major supporter in the
operation of this facility.
· Alcator
C-Mod:
Alcator C-Mod at the Massachusetts Institute of Technology
is operated as a DOE national user facility. Alcator
C-Mod is a unique, compact tokamak facility that uses
intense magnetic fields to confine high-temperature,
high-density plasmas in a small volume. One of its unique
features are the metal (molybdenum) walls to accommodate
high power densities. Alcator C-Mod has made significant
contributions to the world fusion program in the areas
of plasma heating, stability, and confinement of high
field tokamaks, which are important integrating issues
related to ignition of burning of fusion plasma. DOE’s
Office of Science, Fusion Energy Sciences program, is
a significant contributor to the operation of this facility.
· National
Spherical Torus Experiment (NSTX):
NSTX is an innovative magnetic fusion device that was
constructed by the Princeton Plasma Physics Laboratory
in collaboration with the Oak Ridge National Laboratory,
Columbia University, and the University of Washington
at Seattle. It is one of the world’s two largest
embodiments of the spherical torus confinement concept.
Like DIII-D and Alcator C-Mod, NSTX is also operated
as a DOE national scientific user facility. NSTX has
a unique, nearly spherical plasma shape that provides
a test of the theory of toroidal magnetic confinement
as the spherical limit is approached. Plasmas in spherical
torii have been predicted to be stable even when high
ratios of plasma-to-magnetic pressure and self-driven
current fraction exist simultaneously in the presence
of a nearby conducting wall bounding the plasma. If
these predictions are verified, it would indicate that
spherical torii use applied magnetic fields more efficiently
than most other magnetic confinement systems and could,
therefore, be expected to lead to more cost-effective
fusion power systems in the long term. DOE’s Office
of Science, Fusion Energy Sciences program is the major
contributor to the operation of this facility.
High
Energy Physics
· Tevatron
Collider:
Tevatron is the world's highest-energy particle accelerator.
It is located and managed by Fermi National Accelerator
Laboratory in Batavia, Illinois. The Tevatron, four
miles in circumference and originally named the Energy
Doubler when it began operation in 1983, is the world's
highest-energy particle accelerator. Its 1,000 superconducting
magnets are cooled by liquid helium to -268 degrees
C (-450 degrees F). Its low-temperature cooling system
was the largest ever built when it was placed in operation
in 1983. Two major components of the Standard Model
of Fundamental Particles and Forces were discovered
at Fermilab: the bottom quark (May-June 1977) and the
top quark (February 1995). In July 2000, Fermilab experimenters
announced the first direct observation of the tau neutrino,
the last fundamental particle to be observed. Filling
the final slot in the Standard Model, the tau neutrino
set the stage for new discoveries and new physics with
the inauguration of Collider Run II of the Tevatron
in March 2001. DOE’s Office of Science, High Energy
and Nuclear Physics program supports the Tevatron Collider
as well as 90 percent of the federally funded research
in high-energy physics in the U.S.
· Main
Injector:
The Main Injector, completed in 1999, is an accelerator
facility at Fermi National Accelerator Laboratory in
Batavia, Illinois. It accelerates particles and transfers
beams. It has four functions: (1) It accelerates protons
from 8 GeV to 150 GeV. (2) It produces 120 GeV protons,
which are used for antiproton production (see picture
and text at bottom). (3) It receives antiprotons from
the Antiproton Source and increases their energy to
150 GeV. (4) It injects protons and antiprotons into
the Tevatron. Inside the Main Injector tunnel, physicists
have also installed an Antiproton Recycler (green ring).
It stores antiprotons that return from a trip through
the Tevatron, waiting to be re-injected. The Main Injector
is supported by DOE’s Office of Science, High
Energy and Nuclear Physics program.
· Booster
Neutrino (BooNE):
BooNE is a facility managed by at Fermi National Accelerator
Laboratory in Batavia, Illinois. BooNE investigates
the question of neutrino mass by searching for neutrino
oscillations from muon neutrinos to electron neutrinos.
This is done by directing a muon neutrino beam into
the MiniBooNE detector and looking for electron neutrinos.
This experiment is motivated by the oscillation results
reported by the LSND experiment at Los Alamos. By changing
the muon neutrino beam into an anti-neutrino beam, BooNE
can explore oscillations from muon anti-neutrinos to
electron anti-neutrinos. A comparison between neutrino
and anti-neutrino results will tell us about CP- and
CPT-violation. The BooNE collaboration consists of approximately
sixty-five physicists from 13 institutions but is primarily
supported by DOE’s Office of Science, High Energy
and Nuclear Physics program.
· Neutrinos
at the Main Injector (NuMI):
NuMI is a facility at Fermi National Accelerator Laboratory
in Batavia, Illinois, that uses protons from the Main
Injector accelerator to produce a beam of neutrinos
aimed at the Soudan Mine in Northern Minnesota. NuMI
is supported by DOE’s Office of Science, High
Energy and Nuclear Physics program.
· B-Factory:
The B-Factory at Stanford Linear Accelerator Center
near Menlo Park, California, consists of a portion of
the 3.2 kilometer- (2-mile-) long linear accelerator,
a set of circular storage rings for electrons and positrons,
and a large detector. At this facility, beams of electrons
and positrons will collide nearly (but not quite) head-on
and make B mesons. The mesons, each containing a bottom
(or anti-bottom) quark will decay after a short interval,
providing information about the mysterious CP-violation
phenomenon. B-Factory as well as the Stanford Linear
Accelerator Center are supported by DOE’s Office
of Science, High Energy and Nuclear Physics program.
· Next
Linear Collider Test Accelerator (NLCTA ):
NLCTA at Stanford Linear Accelerator Center near Menlo
Park, California, is a small accelerator that is a prototype
for the Next Linear Collider (NLC) accelerator design.
This test facility has been run using an NLC prototype
klystron and has produced electron bunch accelerations
that meet the NLC design criteria. Further testing and
prototyping is being carried out to design and test
efficient production methods for such a structure. The
NLCTA is supported by DOE’s Office of Science,
High Energy and Nuclear Physics program.
· Final
Focus Test Beam (FFTB):
FFTB facility at Stanford Linear Accelerator Center
near Menlo Park, California, was built in 1993 by an
international collaboration and includes magnets and
other beam elements constructed in Russia, Japan, and
Germany, as well as the U.S. Its purpose is to investigate
the factors that limit the size and stability of the
beam at the collision point for a linear collider. Since
the rate of collisions depends on beam density, the
ability to focus the beam to a tiny size at the collision
is one of the critical parameters that will determine
the research capability of such a facility. FFTB is
supported by DOE’s Office of Science, High Energy
and Nuclear Physics program.
· Accelerator
Test Facility (ATF):
ATF at Brookhaven National Laboratory on Long Island
in Upton, New York, is a users facility dedicated for
long-term R&D in Physics of Beams. The ATF core
capabilities include a high-brightness photoinjector
electron gun, a 70 MeV linac, high power lasers synchronized
to the electron beam to a picosecond level, four beam
lines (most with energy spectrometers) and a sophisticated
computer control system. ATF users, from universities,
national labs and industry, are carrying out R&D
on Advanced Accelerator Physics and are studying the
interactions of high power electromagnetic radiation
and high brightness electron beams, including laser
acceleration of electrons and Free-Electron Lasers.
Other topics include the development of electron beams
with extremely high brightness, photo-injectors, electron
beam and radiation diagnostics and computer controls.
ATF is supported by DOE’s Office of Science, High
Energy and Nuclear Physics program and Basic Energy
Sciences program.
Nuclear
Physics
· Relativistic
Heavy Ion Collider (RHIC):
RHIC at Brookhaven National Laboratory is a world-class
scientific research facility that began operation in
2000, following 10 years of development and construction.
Hundreds of physicists from around the world use RHIC
to study what the universe may have looked like in the
first few moments after its creation. RHIC drives two
intersecting beams of gold ions head-on, in a subatomic
collision. What physicists learn from these collisions
may help us understand more about why the physical world
works the way it does, from the smallest subatomic particles,
to the largest stars. RHIC is supported by DOE’s
Office of Science, High Energy and Nuclear Physics program.
· Continuous
Electron Beam Accelerator Facility (CEBAF):
CEBAF at Thomas Jefferson National Accelerator Facility
in Newport News, Virginia, supports Jefferson Lab's
main mission of nuclear physics research. Based on superconducting
radio-frequency (SRF) accelerating technology, CEBAF
is the world's most advanced particle accelerator for
investigating the quark structure of the atom's nucleus.
CEBAF is supported by DOE’s Office of Science,
High Energy and Nuclear Physics program.
· Bates
Linear Accelerator Center:
Bates Linear Accelerator Center is a university-based
facility for nuclear physics, operated by the Massachusetts
Institute of Technology for DOE’s Office of Science,
High Energy and Nuclear Physics program, as a National
User Facility. Over 200 physicists from 52 institutions
are currently involved in active experiments at Bates.
Bates carries out frontier research in nuclear physics
with electron beams up to approximately 1 GeV in energy.
Active areas of study presently at Bates include determination
of the strange quark contribution to the intrinsic magnetism
of the proton (SAMPLE) and a precise determination of
the small components of the transition of the nucleon
to its first excited state (OOPS). For the future, a
major new detector is under construction to measure
spin-dependent electron scattering from polarized nuclei
(BLAST). In addition to carrying out research in nuclear
physics, Bates has educated and trained a large number
of students and post-docs in nuclear physics over the
last twenty years.
· Holifield
Radioactive Ion Beam Facility (HRIBF):
HRIBF at Oak Ridge National Laboratory in Oak Ridge,
Tennessee, began operation in early 1997 providing accelerated
radioactive ion beams (RIBs) for research in nuclear
structure physics and nuclear astrophysics. The HRIBF
incorporates two previously existing ORNL accelerators
with a newly constructed RIB injector system (high voltage
production target and ion source platform together with
two stages of mass separation) into a coupled system
for the production and acceleration of radioactive ions.
The facility is based on the isotope separator on-line
(ISOL) method using the k=100 Oak Ridge Isochronous
Cyclotron (ORIC) to provide intense light-ion (p, d,
^3,4He) beams for production of radioactive species
and the 25 MV ORNL Tandem to accelerate the RIBs to
energies required for nuclear physics research. HRIBF
is supported by DOE’s Office of Science, High
Energy and Nuclear Physics program.
· Argonne
Tandem Linear Accelerator System (ATLAS):
ATLAS is a national user facility at Argonne National
Laboratory in Argonne, Illinois. ATLAS is the world's
first heavy-ion accelerator to use superconducting elements
for beam focusing and acceleration. Its superconducting
resonators make possible a continuous beam. Traditional
materials would produce too much heat, requiring a pulsed
beam. Physicists from institutions across the United
States and more than a dozen foreign countries participate
in experiments at the facility. Physicists from all
over the world use ATLAS to probe the structure of the
atomic nucleus by studying the gamma rays and particles
emitted when ion beams smash into targets. The 500-foot-long
accelerator is capable of accelerating ions (atoms stripped
of one or more electrons) of any element up to uranium
to energies as high as 17 million electron volts (MeV)
per nucleon - about 15 percent of the speed of light.
ATLAS staff currently are investigating the possibility
of accelerating unstable (radioactive) atoms with a
new addition to ATLAS called the Rare Isotope Accelerator.
Beams of unstable ions would be extremely valuable in
a wide range of studies, including nuclear astrophysics--the
field that attempts to understand the origin and abundance
of the elements that make up all matter in the universe.
ATLAS is supported by DOE’s Office of Science,
High Energy and Nuclear Physics program.
· Triangle
Universities Nuclear Laboratory (TUNL):
TUNL is funded by DOE’s Office of Science, High
Energy and Nuclear Physics program, with research faculty
from three major universities within the Research Triangle
area: Duke University, North Carolina State University,
and the University of North Carolina-Chapel Hill. Located
on the campus of Duke University in Durham, North Carolina,
behind the Physics department, TUNL draws additional
collaborators from many universities in the southeast,
as well as from labs and universities across the country
and all over the world.
· Texas
A&M Cyclotron Institute:
Texas A&M Cyclotron Institute is a DOE university
facility that is jointly supported by DOE’s Office
of Science, High Energy and Nuclear Physics program,
and the State of Texas. It is a major technical resource
for the State and the Nation. Internationally recognized
for its research contributions, the institute provides
the primary infrastructure support for the University’s
graduate programs in nuclear chemistry and nuclear physics.
The Institute’s programs focus on conducting basic
research, educating students in accelerator-based science
and technology, and providing technical capabilities
in a wide variety of applications in space science,
materials science, analytical procedures, and nuclear
medicine.
·
University
of Washington Tandem Van de Graaff:
The University of Washington tandem Van de Graaff accelerator
provides precisely characterized proton beams for extended
running periods for research in fundamental nuclear
interactions and nuclear astrophysics. The accelerator
is part of the Center for Experimental Nuclear Physics
and Astrophysics (CENPA) at the University of Washington
in Seattle. CENPA supports a broad program of experimental
physics research, providing a unique setting for the
training and education of graduate students in the U.S.,
where they have the opportunity to be involved in all
aspects of low energy nuclear research.
· The
Yale University Tandem Van de Graaff:
The Wright Nuclear Structure Laboratory
(WNSL) at Yale University in New Haven, Connecticut,
houses a powerful stand-alone tandem Van de Graaff accelerator,
capable of terminal voltages in excess of 20 MV. There
are active in-house research programs in nuclear structure,
nuclear astrophysics, and relativistic heavy ion physics.
The nuclear structure group studies the behavior of
the atomic nucleus under the induced stress of high
angular momentum, high excitation energies, or extreme
ratios of proton to neutron number. The nuclear astrophysics
program centers on the study of the nuclear reactions
involved in explosive nucleosynthesis. The facility
provides a variety of stable beams for an extensive
suite of instruments that, along with the opportunity
for extended running times, making possible detailed
studies on symmetry, collective structures, and evolution
of properties in nuclei and nuclear astrophysics.
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