National Library of Energy BETA

Sample records for finding subatomic particles

  1. Supercomputers Speed Search for New Subatomic Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Supercomputers Speed Search for New Subatomic Particles Supercomputers Speed Search for New Subatomic Particles High-Precision Lattice QCD Computations Find Unexpected 'Penguin' Decay December 2, 2015 Contact: Kathy Kincade, kkincade@lbl.gov, 510-495-2124 penguin Artist's rendering of a rare B-meson "penguin" (decay process) showing the quark-level process. Image: Daping Du, Syracuse University A team of theoretical high-energy physicists in the Fermilab Lattice and MILC Collaborations

  2. Supercomputers Speed Search for New Subatomic Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Additionally, the new theory should account for the astrophysical observations of dark matter and dark energy. The particle nature of dark matter is a complete mystery." Scientists ...

  3. Subatomic Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5 Subatomic Physics We play a major role in large-scale scientific collaborations around the world, performing nuclear physics experiments that advance the understanding of the hidden subatomic reactions of the universe and how high explosives affect matter. Contact Us Group Leader Melynda Brooks Email Deputy Group Leader Frans Trouw Email Group Office (505) 667-6941 A detector that uses muons, tiny particles generated when cosmic rays interact with Earth's atmosphere to look inside the cores of

  4. Commercial and Cost Effective Production of Two-Dimensional Read-Out Boards for Sub-Atomic Particle Detectors

    SciTech Connect (OSTI)

    Crary, David; Majka, Richard

    2010-10-22

    We report results from research aimed at developing and demonstrating production of 2-D readout structures for GEM (Gas Electron Multiplier) charged particle tracking chambers at Tech-Etch. Readout boards of two types, bi-planar and single plane, were fabricated and evaluated. The results show that Tech-Etch can produce suitable boards of either type however the single plane board has a number of advantages both in production and use that will likely make it the preferred choice for GEM tracking chambers.

  5. Commercial and Cost Effective Production of Two-Dimensional Read-Out Boards for Sub-Atomic Particle Detectors

    SciTech Connect (OSTI)

    Crary, David; Majka, Richard

    2010-10-22

    Tech-Etch has considerable experience in numerous related high precision etched KaptonÂź products including production of GEM foils. The required precision and production process for 2-D readout boards is similar to that developed for GEM foil production. Additionally, Tech-Etch has strong ties with several research institutions (namely Brookhaven National Laboratory, MIT and Yale University) that can help design and evaluate the performance of the readout boards produced at Tech-Etch. Since Tech-Etch is a small company, it also has the capability to produce a large variety of part configurations, optimized for a particular customer's requirements. We report results from research aimed at developing and demonstrating production of 2-D readout structures for GEM (Gas Electron Multiplier) charged particle tracking chambers at Tech-Etch. Readout boards of two types, bi-planar and single plane, were fabricated and evaluated. The results show that Tech-Etch can produce suitable boards of either type however the single plane board has a number of advantages both in production and use that will likely make it the preferred choice for GEM tracking chambers.

  6. Fermilab | Science | Particle Physics 101 | How to find the smallest

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    particles - Particle Detectors How to find the smallest particles - Particle Detectors Scientists have invented and built many types of devices to detect particles. Most experiments at Fermilab use huge detectors that consist of intricate configurations of different detection devices, designed to collect the most possible information about the different types of particles created in a particle collision. Different types of particle detectors: Scintillators - When a high energy particle

  7. Big Bang Day: 5 Particles - 5. The Next Particle

    ScienceCinema (OSTI)

    None

    2011-04-25

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 5. The Next Particle The "sparticle" - a super symmetric partner to all the known particles could be the answer to uniting all the known particles and their interactions under one grand theoretical pattern of activity. But how do researchers know where to look for such phenomena and how do they know if they find them? Simon Singh reviews the next particle that physicists would like to find if the current particle theories are to ring true.

  8. Fermilab | Science | Particle Physics | Muons

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Muons photo Two planned Fermilab experiments, Mu2e and Muon g-2, will use particles called muons to search for rare and hidden phenomena in the quantum realm. In recent years, particle physicists have increasingly turned their attention to finding evidence for physics beyond the already known building blocks of matter and subatomic forces that determine their interactions. Discoveries beyond the well-established Standard Model will help scientists answer some of the most puzzling and pressing

  9. Finding

    Office of Legacy Management (LM)

    Finding of No Significant Impact Ground Water Compliance at the Grand Junction UMTRA Project Site (Climax Uranium Millsite) September 1999 U.S. Department of Energy Grand Junction ...

  10. Big Bang Day: 5 Particles - 3. The Anti-particle

    ScienceCinema (OSTI)

    None

    2011-04-25

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 3. The Anti-particle. It appears to be the stuff of science fiction. Associated with every elementary particle is an antiparticle which has the same mass and opposite charge. Should the two meet and combine, the result is annihilation - and a flash of light. Thanks to mysterious processes that occurred after the Big Bang there are a vastly greater number of particles than anti-particles. So how could their elusive existence be proved? At CERN particle physicists are crashing together subatomic particles at incredibly high speeds to create antimatter, which they hope will finally reveal what happened at the precise moment of the Big Bang to create the repertoire of elementary particles and antiparticles in existence today.

  11. Scientists Find Asymmetry in Topological Insulators - News Releases | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists Find Asymmetry in Topological Insulators Surprising findings bolster case for energy efficient quantum computer August 12, 2013 New research shows that a class of materials being eyed for the next generation of computers behaves asymmetrically at the sub-atomic level. This research is a key step toward understanding the topological insulators that may have the potential to be the building blocks of a super-fast quantum computer that could run on almost no electricity. Scientists from

  12. Big Bang Day: 5 Particles - 4. The Neutrino

    ScienceCinema (OSTI)

    None

    2011-04-25

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". It's the most populous particle in the universe. Millions of these subatomic particles are passing through each one of us. With no charge and virtually no mass they can penetrate vast thicknesses of matter without any interaction - indeed the sun emits huge numbers that pass through earth at the speed of light. Neutrinos are similar to the more familiar electron, with one crucial difference: neutrinos do not carry electric charge. As a result they're extremely difficult to detect . But like HG Wells' invisible man they can give themselves away by bumping into things at high energy and detectors hidden in mines are exploiting this to observe these rare interactions.

  13. Award-winning technology provides a breakthrough in particle physics |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Argonne National Laboratory Award-winning technology provides a breakthrough in particle physics By Jared Sagoff * August 3, 2012 Tweet EmailPrint High-energy physics, it turns out, is a lot like life - it's all about the timing. In order to identify the tiny subatomic particles that erupt from the atom-smashing experiments that occur in subterranean laboratories like the Large Hadron Collider near Geneva, Switzerland, scientists need detectors that have split-second reflexes. The desire to

  14. HERSCHEL FINDS EVIDENCE FOR STELLAR WIND PARTICLES IN A PROTOSTELLAR ENVELOPE: IS THIS WHAT HAPPENED TO THE YOUNG SUN?

    SciTech Connect (OSTI)

    Ceccarelli, C.; López-Sepulcre, A.; Dominik, C.; Kama, M.; Padovani, M.; Caux, E.; Caselli, P.

    2014-07-20

    There is evidence that the young Sun emitted a high flux of energetic (?10 MeV) particles. The collisions of these particles with the material at the inner edge of the Protosolar Nebula disk induced spallation reactions that formed short-lived radionuclei, like {sup 10}Be, whose trace is now visible in some meteorites. However, it is poorly known exactly when this happened, and whether and how it affected the solar system. Here, we present indirect evidence for an ejection of energetic particles in the young protostar, OMC-2 FIR 4, similar to that experienced by the young solar system. In this case, the energetic particles collide with the material in the protostellar envelope, enhancing the abundance of two molecular ions, HCO{sup +} and N{sub 2}H{sup +}, whose presence is detected via Herschel observations. The flux of energetic particles at a distance of 1 AU from the emitting source, estimated from the measured abundance ratio of HCO{sup +} and N{sub 2}H{sup +}, can easily account for the irradiation required by meteoritic observations. These new observations demonstrate that the ejection of ?10 MeV particles is a phenomenon occurring very early in the life of a protostar, before the disappearance of the envelope from which the future star accretes. The whole envelope is affected by the event, which sets constraints on the magnetic field geometry in the source and opens up the possibility that the spallation reactions are not limited to the inner edge of the Protosolar Nebula disk.

  15. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, K.E.

    1988-07-28

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non- superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propagating in a superconducting transmission line are used to resolve N/sup 2/ ambiguity of charged particle events. 6 figs.

  16. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, Kenneth E.

    1989-01-01

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non-superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propogating in a superconducting transmission line are used to resolve N.sup.2 ambiguity of charged particle events.

  17. RESONATOR PARTICLE SEPARATOR

    DOE Patents [OSTI]

    Blewett, J.P.

    1962-01-01

    A wave guide resonator structure is described for use in separating particles of equal momentum but differing in mass and having energies exceeding one billion electron volts. The particles are those of sub-atomic size and are generally produced as a result of the bombardment of a target by a beam such as protons produced in a high-energy accelerator. In this wave guide construction, the particles undergo preferential deflection as a result of the presence of an electric field. The boundary conditions established in the resonator are such as to eliminate an interfering magnetic component, and to otherwise phase the electric field to obtain a traveling wave such as one which moves at the same speed as the unwanted particle. The latter undergoes continuous deflection over the whole length of the device and is, therefore, eliminated while the wanted particle is deflected in opposite directions over the length of the resonator and is thus able to enter an exit aperture. (AEC)

  18. Big Bang Day: 5 Particles - 2. The Quark

    SciTech Connect (OSTI)

    None

    2009-10-07

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 2. The Quark "Three Quarks for Master Mark! Sure he hasn't got much of a bark." James Joyce's Finnegans Wake left its mark on modern physics when physicist Murray Gell Mann proposed this name for a group of hypothetical subatomic particles that were revealed in 1960 as the fundamental units of matter. Basic particles it seems are made up of even more basic units called quarks that make up 99.9% of visible material in the universe.. But why do we know so little about them? Quarks have never been seen as free particles but instead, inextricably bound together by the Strong Force that in turn holds the atomic nucleus together. This is the hardest of Nature's fundamental forces to crack, but recent theoretical advances, mean that the properties of the quark are at last being revealed.

  19. Big Bang Day: 5 Particles - 2. The Quark

    ScienceCinema (OSTI)

    None

    2011-04-25

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 2. The Quark "Three Quarks for Master Mark! Sure he hasn't got much of a bark." James Joyce's Finnegans Wake left its mark on modern physics when physicist Murray Gell Mann proposed this name for a group of hypothetical subatomic particles that were revealed in 1960 as the fundamental units of matter. Basic particles it seems are made up of even more basic units called quarks that make up 99.9% of visible material in the universe.. But why do we know so little about them? Quarks have never been seen as free particles but instead, inextricably bound together by the Strong Force that in turn holds the atomic nucleus together. This is the hardest of Nature's fundamental forces to crack, but recent theoretical advances, mean that the properties of the quark are at last being revealed.

  20. 100 years of elementary particles [Beam Line, vol. 27, issue 1, Spring 1997

    SciTech Connect (OSTI)

    Pais, Abraham; Weinberg, Steven; Quigg, Chris; Riordan, Michael; Panofsky, Wolfgang K.H.; Trimble, Virginia

    1997-04-01

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe.

  1. 100 years of Elementary Particles [Beam Line, vol. 27, issue 1, Spring 1997

    DOE R&D Accomplishments [OSTI]

    Pais, Abraham; Weinberg, Steven; Quigg, Chris; Riordan, Michael; Panofsky, Wolfgang K. H.; Trimble, Virginia

    1997-04-01

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe.

  2. DOE Science Showcase - Particle Physics | OSTI, US Dept of Energy Office

    Office of Scientific and Technical Information (OSTI)

    of Scientific and Technical Information Particle Physics Particle Physics Research in DOE Databases Energy Citations Database DOE R&D Accomplishments DOE Data Explorer ScienceCinema Science.gov WorldWideScience.gov More information ATLAS and CMS experiments present Higgs search status , CERN The U.S. at the Large Hadrons Collider A Subatomic Venture CERN What is a Higgs Boson? Fermilab video Brookhaven Lab and the Search for the Higgs, BNL ANL particle physicist Tom LeCompte Visit the

  3. Big Bang Day: 5 Particles - 1. The Electron

    ScienceCinema (OSTI)

    None

    2011-04-25

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 1. The Electron Just over a century ago, British physicist J.J. Thompson experimenting with electric currents and charged particles inside empty glass tubes, showed that atoms are divisible into indivisible elementary particles. But how could atoms be built up of these so called "corpuscles"? An exciting 30 year race ensued, to grasp the planetary model of the atom with its orbiting electrons, and the view inside the atom was born. Whilst the number of electrons around the nucleus of an atom determines their the chemistry of all elements, the power of electrons themselves have been harnessed for everyday use: electron beams for welding,cathode ray tubes and radiation therapy.

  4. Big Bang Day: 5 Particles - 1. The Electron

    SciTech Connect (OSTI)

    2009-10-07

    Simon Singh looks at the stories behind the discovery of 5 of the universe's most significant subatomic particles: the Electron, the Quark, the Anti-particle, the Neutrino and the "next particle". 1. The Electron Just over a century ago, British physicist J.J. Thompson experimenting with electric currents and charged particles inside empty glass tubes, showed that atoms are divisible into indivisible elementary particles. But how could atoms be built up of these so called "corpuscles"? An exciting 30 year race ensued, to grasp the planetary model of the atom with its orbiting electrons, and the view inside the atom was born. Whilst the number of electrons around the nucleus of an atom determines their the chemistry of all elements, the power of electrons themselves have been harnessed for everyday use: electron beams for welding,cathode ray tubes and radiation therapy.

  5. Find Journals

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    | Department of Energy Find Energy Incentives Quicker and Easier with DSIRE Open Data and Website Find Energy Incentives Quicker and Easier with DSIRE Open Data and Website March 3, 2015 - 4:16pm Addthis The updated Database of State Incentives for Renewables & Efficiency helps homeowners and businesses find incentive programs that can reduce or defray installation or purchase costs of technologies like photovoltaic systems. | Photo by Dennis Schroeder, National Renewable Energy

  6. Find Books

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Books Find Books The Library Catalog is available to the public, though many eBooks are limited to LANL researchers. Question? 667-5809 Email Library Catalog: Search here for all...

  7. Find Clear

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

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    Find Clear Slide Title Duration Status myMail@adobe.com http:Adobe.com More Info>>

  8. Find Clear

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

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    Find Clear Slide Title Duration Status myMail@adobe.com http:Adobe.com More Info>>

  9. Find Reports

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reports Find Reports Most of the reports sources below are publicly accessible. Question? 667-5809 Email Unclassified Los Alamos Reports Library Catalog - Print and electronic (1943-present) Los Alamos Authors (LANL-only access) - LA-, LA-CP, and LA-UR reports (1973-present) Los Alamos Research Online - Find published versions of Los Alamos research (2006-present) Classified reports - contact the SI-RMS Technical Report Collection for an appointment: phone icon 5-4168 / email icon

  10. Particle preconcentrator

    DOE Patents [OSTI]

    Linker, K.L.; Conrad, F.J.; Custer, C.A.; Rhykerd, C.L. Jr.

    1998-12-29

    An apparatus and method are disclosed for preconcentrating particles and vapors. The preconcentrator apparatus permits detection of highly diluted amounts of particles in a main gas stream, such as a stream of ambient air. A main gas stream having airborne particles entrained therein is passed through a pervious screen. The particles accumulate upon the screen, as the screen acts as a sort of selective particle filter. The flow of the main gas stream is then interrupted by diaphragm shutter valves, whereupon a cross-flow of carrier gas stream is blown parallel past the faces of the screen to dislodge the accumulated particles and carry them to a particle or vapor detector, such as an ion mobility spectrometer. The screen may be heated, such as by passing an electrical current there through, to promote desorption of particles therefrom during the flow of the carrier gas. Various types of screens are disclosed. The apparatus and method of the invention may find particular utility in the fields of narcotics, explosives detection and chemical agents. 3 figs.

  11. Particle preconcentrator

    DOE Patents [OSTI]

    Linker, Kevin L.; Conrad, Frank J.; Custer, Chad A.; Rhykerd, Jr., Charles L.

    2000-01-01

    An apparatus and method for preconcentrating particles and vapors. The preconcentrator apparatus permits detection of highly diluted amounts of particles in a main gas stream, such as a stream of ambient air. A main gas stream having airborne particles entrained therein is passed through a pervious screen. The particles accumulate upon the screen, as the screen acts as a sort of selective particle filter. The flow of the main gas stream is then interrupted by diaphragm shutter valves, whereupon a cross-flow of carrier gas stream is blown parallel past the faces of the screen to dislodge the accumulated particles and carry them to a particle or vapor detector, such as an ion mobility spectrometer. The screen may be heated, such as by passing an electrical current there through, to promote desorption of particles therefrom during the flow of the carrier gas. Various types of screens are disclosed. The apparatus and method of the invention may find particular utility in the fields of narcotics, explosives detection and chemical agents.

  12. Particle preconcentrator

    DOE Patents [OSTI]

    Linker, Kevin L.; Conrad, Frank J.; Custer, Chad A.; Rhykerd, Jr., Charles L.

    2005-09-20

    An apparatus and method for preconcentrating particles and vapors. The preconcentrator apparatus permits detection of highly diluted amounts of particles in a main gas stream, such as a stream of ambient air. A main gas stream having airborne particles entrained therein is passed through a pervious screen. The particles accumulate upon the screen, as the screen acts as a sort of selective particle filter. The flow of the main gas stream is then interrupted by diaphragm shutter valves, whereupon a cross-flow of carrier gas stream is blown parallel past the faces of the screen to dislodge the accumulated particles and carry them to a particle or vapor detector, such as an ion mobility spectrometer. The screen may be heated, such as by passing an electrical current there through, to promote desorption of particles therefrom during the flow of the carrier gas. Various types of screens are disclosed. The apparatus and method of the invention may find particular utility in the fields of narcotics, explosives detection and chemical agents.

  13. Particle preconcentrator

    DOE Patents [OSTI]

    Linker, Kevin L.; Conrad, Frank J.; Custer, Chad A.; Rhykerd, Jr., Charles L.

    1998-01-01

    An apparatus and method for preconcentrating particles and vapors. The preconcentrator apparatus permits detection of highly diluted amounts of particles in a main gas stream, such as a stream of ambient air. A main gas stream having airborne particles entrained therein is passed through a pervious screen. The particles accumulate upon the screen, as the screen acts as a sort of selective particle filter. The flow of the main gas stream is then interrupted by diaphragm shutter valves, whereupon a cross-flow of carrier gas stream is blown parallel past the faces of the screen to dislodge the accumulated particles and carry them to a particle or vapor detector, such as an ion mobility spectrometer. The screen may be heated, such as by passing an electrical current there through, to promote desorption of particles therefrom during the flow of the carrier gas. Various types of screens are disclosed. The apparatus and method of the invention may find particular utility in the fields of narcotics, explosives detection and chemical agents.

  14. Find Patents

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Patents Find Patents Some of these resources are Lab-only and will require Remote Access. Questions? 667-5809 Email US Patents Google Patents - search USPTO patents in a Google interface USPTO Database (United States Patent and Trademark Office) DOE Patents - only patents resulting from DOE-sponsored research Worldwide Patents Espacenet Patent Search (European Patent Office) Free Patents Online SciFinder information (from Chemical Abstracts Service) Ordering Patents Thomson Innovation - contact

  15. Find Preprints

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Preprints Find Preprints Journal preprints may only be available via subscription and thus require Remote Access. Questions? 667-5809 Email Databases arXiv.org - open access eprints in Physics, Mathematics, Computer Science, Quantitative Biology, and Statistics bioRxiv.org - preprint server for Biology operated by Cold Spring Harbor Laboratory INSPIRE - High Energy Physics (HEP) papers updated daily (a collaboration of CERN, DESY, Fermilab, and SLAC) Journals Online journals often offer

  16. Nano Particles - Supercritical Fluid Process - Energy Innovation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Nano Particles ... Applications and Industries Nano particles, supercritical fluid, photovoltaic devices, ...

  17. TOPAS Tool for Particle Simulation

    Energy Science and Technology Software Center (OSTI)

    2013-05-30

    TOPAS lets users simulate the passage of subatomic particles moving through any kind of radiation therapy treatment system, can import a patient geometry, can record dose and other quantities, has advanced graphics, and is fully four-dimensional (3D plus time) to handle the most challenging time-dependent aspects of modern cancer treatments.TOPAS unlocks the power of the most accurate particle transport simulation technique, the Monte Carlo (MC) method, while removing the painstaking coding work such methods usedmore » to require. Research physicists can use TOPAS to improve delivery systems towards safer and more effective radiation therapy treatments, easily setting up and running complex simulations that previously used to take months of preparation. Clinical physicists can use TOPAS to increase accuracy while reducing side effects, simulating patient-specific treatment plans at the touch of a button. TOPAS is designed as a “user code” layered on top of the Geant4 Simulation Toolkit. TOPAS includes the standard Geant4 toolkit, plus additional code to make Geant4 easier to control and to extend Geant4 functionality. TOPAS aims to make proton simulation both “reliable” and “repeatable.” “Reliable” means both accurate physics and a high likelihood to simulate precisely what the user intended to simulate, reducing issues of wrong units, wrong materials, wrong scoring locations, etc. “Repeatable” means not just getting the same result from one simulation to another, but being able to easily restore a previously used setup and reducing sources of error when a setup is passed from one user to another. TOPAS control system incorporates key lessons from safety management, proactively removing possible sources of user error such as line-ordering mistakes In control files. TOPAS has been used to model proton therapy treatment examples including the UCSF eye treatment head, the MGH stereotactic alignment in radiosurgery treatment head and the MGH gantry

  18. Particle Astrophysics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Particle Astrophysics Particle Astrophysics Understanding discoveries at the Energy, Intensity, and Cosmic Frontiers Get Expertise Rajan Gupta (505) 667-7664 Email Bruce Carlsten (505) 667-5657 Email Particle Astrophysics Stars offer unique laboratories for particle physics. They can be sensitive to minute interactions of neutrinos, as well as to other, hypothetical weakly interacting particles. The origin of this sensitivity lies in the mechanism of stellar evolution: it can be sped up, or even

  19. Particle separation

    DOE Patents [OSTI]

    Moosmuller, Hans; Chakrabarty, Rajan K.; Arnott, W. Patrick

    2011-04-26

    Embodiments of a method for selecting particles, such as based on their morphology, is disclosed. In a particular example, the particles are charged and acquire different amounts of charge, or have different charge distributions, based on their morphology. The particles are then sorted based on their flow properties. In a specific example, the particles are sorted using a differential mobility analyzer, which sorts particles, at least in part, based on their electrical mobility. Given a population of particles with similar electrical mobilities, the disclosed process can be used to sort particles based on the net charge carried by the particle, and thus, given the relationship between charge and morphology, separate the particles based on their morphology.

  20. Particle generator

    DOE Patents [OSTI]

    Hess, Wayne P.; Joly, Alan G.; Gerrity, Daniel P.; Beck, Kenneth M.; Sushko, Peter V.; Shlyuger, Alexander L.

    2005-06-28

    Energy tunable solid state sources of neutral particles are described. In a disclosed embodiment, a halogen particle source includes a solid halide sample, a photon source positioned to deliver photons to a surface of the halide, and a collimating means positioned to accept a spatially defined plume of hyperthermal halogen particles emitted from the sample surface.

  1. Pileup per particle identification

    SciTech Connect (OSTI)

    Bertolini, Daniele; Harris, Philip; Low, Matthew; Tran, Nhan

    2014-10-09

    We propose a new method for pileup mitigation by implementing “pileup per particle identification” (PUPPI). For each particle we first define a local shape α which probes the collinear versus soft diffuse structure in the neighborhood of the particle. The former is indicative of particles originating from the hard scatter and the latter of particles originating from pileup interactions. The distribution of α for charged pileup, assumed as a proxy for all pileup, is used on an event-by-event basis to calculate a weight for each particle. The weights describe the degree to which particles are pileup-like and are used to rescale their four-momenta, superseding the need for jet-based corrections. Furthermore, the algorithm flexibly allows combination with other, possibly experimental, probabilistic information associated with particles such as vertexing and timing performance. We demonstrate the algorithm improves over existing methods by looking at jet pT and jet mass. As a result, we also find an improvement on non-jet quantities like missing transverse energy.

  2. Pileup per particle identification

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bertolini, Daniele; Harris, Philip; Low, Matthew; Tran, Nhan

    2014-10-09

    We propose a new method for pileup mitigation by implementing “pileup per particle identification” (PUPPI). For each particle we first define a local shape α which probes the collinear versus soft diffuse structure in the neighborhood of the particle. The former is indicative of particles originating from the hard scatter and the latter of particles originating from pileup interactions. The distribution of α for charged pileup, assumed as a proxy for all pileup, is used on an event-by-event basis to calculate a weight for each particle. The weights describe the degree to which particles are pileup-like and are used tomore » rescale their four-momenta, superseding the need for jet-based corrections. Furthermore, the algorithm flexibly allows combination with other, possibly experimental, probabilistic information associated with particles such as vertexing and timing performance. We demonstrate the algorithm improves over existing methods by looking at jet pT and jet mass. As a result, we also find an improvement on non-jet quantities like missing transverse energy.« less

  3. Pileup per particle identification

    SciTech Connect (OSTI)

    Bertolini, Daniele; Harris, Philip; Low, Matthew; Tran, Nhan

    2014-10-09

    We propose a new method for pileup mitigation by implementing “pileup per particle identification” (PUPPI). For each particle we first define a local shape ? which probes the collinear versus soft diffuse structure in the neighborhood of the particle. The former is indicative of particles originating from the hard scatter and the latter of particles originating from pileup interactions. The distribution of ? for charged pileup, assumed as a proxy for all pileup, is used on an event-by-event basis to calculate a weight for each particle. The weights describe the degree to which particles are pileup-like and are used to rescale their four-momenta, superseding the need for jet-based corrections. Furthermore, the algorithm flexibly allows combination with other, possibly experimental, probabilistic information associated with particles such as vertexing and timing performance. We demonstrate the algorithm improves over existing methods by looking at jet pT and jet mass. We also find an improvement on non-jet quantities like missing transverse energy.

  4. Pileup per particle identification

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bertolini, Daniele; Harris, Philip; Low, Matthew; Tran, Nhan

    2014-10-09

    We propose a new method for pileup mitigation by implementing “pileup per particle identification” (PUPPI). For each particle we first define a local shape ? which probes the collinear versus soft diffuse structure in the neighborhood of the particle. The former is indicative of particles originating from the hard scatter and the latter of particles originating from pileup interactions. The distribution of ? for charged pileup, assumed as a proxy for all pileup, is used on an event-by-event basis to calculate a weight for each particle. The weights describe the degree to which particles are pileup-like and are used tomore »rescale their four-momenta, superseding the need for jet-based corrections. Furthermore, the algorithm flexibly allows combination with other, possibly experimental, probabilistic information associated with particles such as vertexing and timing performance. We demonstrate the algorithm improves over existing methods by looking at jet pT and jet mass. We also find an improvement on non-jet quantities like missing transverse energy.« less

  5. Particle separator

    DOE Patents [OSTI]

    Hendricks, Charles D. (Livermore, CA)

    1990-01-01

    Method and apparatus (10) are provided for separating and classifying particles (48,50,56) by dispersing the particles within a fluid (52) that is upwardly flowing within a cone-shaped pipe (12) that has its large end (20) above its small end (18). Particles of similar size and shape (48,50) migrate to individual levels (A,B) within the flowing fluid. As the fluid is deflected by a plate (42) at the top end of the pipe (12), the smallest particles are collected on a shelf-like flange (40). Ever larger particles are collected as the flow rate of the fluid is increased. To prevent particle sticking on the walls (14) of the pipe (12), additional fluid is caused to flow into the pipe (12) through holes (68) that are specifically provided for that purpose. Sticking is further prevented by high frequency vibrators (70) that are positioned on the apparatus (10).

  6. Got a Minute? Which Higgs did we find?

    ScienceCinema (OSTI)

    Stupak, John

    2014-09-15

    Dr. John Stupak talks about the discovery of the Higgs boson. Did scientists find the Higgs boson predicted back in 1964 or did they find just one of a group of particles, with the others still to be found?

  7. Got a Minute? Which Higgs did we find?

    SciTech Connect (OSTI)

    Stupak, John

    2014-06-26

    Dr. John Stupak talks about the discovery of the Higgs boson. Did scientists find the Higgs boson predicted back in 1964 or did they find just one of a group of particles, with the others still to be found?

  8. HOPE Release 3 Pitch Angle Sneak Peak

    SciTech Connect (OSTI)

    Larsen, Brian Arthur; Skoug, Ruth M.

    2015-12-04

    This report describes how the HOPE instrument is used to measure subatomic particles in the Van Allen belts.

  9. Carbon particles

    DOE Patents [OSTI]

    Hunt, Arlon J.

    1984-01-01

    A method and apparatus whereby small carbon particles are made by pyrolysis of a mixture of acetylene carried in argon. The mixture is injected through a nozzle into a heated tube. A small amount of air is added to the mixture. In order to prevent carbon build-up at the nozzle, the nozzle tip is externally cooled. The tube is also elongated sufficiently to assure efficient pyrolysis at the desired flow rates. A key feature of the method is that the acetylene and argon, for example, are premixed in a dilute ratio, and such mixture is injected while cool to minimize the agglomeration of the particles, which produces carbon particles with desired optical properties for use as a solar radiant heat absorber.

  10. Particle blender

    DOE Patents [OSTI]

    Willey, Melvin G.

    1981-01-01

    An infinite blender that achieves a homogeneous mixture of fuel microspheres is provided. Blending is accomplished by directing respective groups of desired particles onto the apex of a stationary coaxial cone. The particles progress downward over the cone surface and deposit in a space at the base of the cone that is described by a flexible band provided with a wide portion traversing and in continuous contact with the circumference of the cone base and extending upwardly therefrom. The band, being attached to the cone at a narrow inner end thereof, causes the cone to rotate on its arbor when the band is subsequently pulled onto a take-up spool. As a point at the end of the wide portion of the band passes the point where it is tangent to the cone, the blended particles are released into a delivery tube leading directly into a mold, and a plate mounted on the lower portion of the cone and positioned between the end of the wide portion of the band and the cone assures release of the particles only at the tangent point.

  11. Supertwistors and massive particles

    SciTech Connect (OSTI)

    Mezincescu, Luca; Routh, Alasdair J.; Townsend, Paul K.

    2014-07-15

    In the (super)twistor formulation of massless (super)particle mechanics, the mass-shell constraint is replaced by a “spin-shell” constraint from which the spin content can be read off. We extend this formalism to massive (super)particles (with N-extended space–time supersymmetry) in three and four space–time dimensions, explaining how the spin-shell constraints are related to spin, and we use it to prove equivalence of the massive N=1 and BPS-saturated N=2 superparticle actions. We also find the supertwistor form of the action for “spinning particles” with N-extended worldline supersymmetry, massless in four dimensions and massive in three dimensions, and we show how this simplifies special features of the N=2 case. -- Highlights: •Spin-shell constraints are related to Poincaré Casimirs. •Twistor form of 4D spinning particle for spin N/2. •Twistor proof of scalar/antisymmetric tensor equivalence for 4D spin 0. •Twistor form of 3D particle with arbitrary spin. •Proof of equivalence of N=1 and N=2 BPS massive 4D superparticles.

  12. Find Theses and Dissertations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Theses and Dissertations Find Theses and Dissertations Most of the theses sources below are publicly accessible. Questions? 667-5809 Email Electronic Databases Open Access Theses and Dissertations - Results limited to freely accessible, full-text ETDs Center for Research Libraries - Foreign Dissertations Collection Theses Canada - Canadian theses from Library and Archives Canada EThOS (Electronic Theses Online Service) - UK theses from the British Library Networked Digital Library of Theses and

  13. Fermilab | Science | Particle Physics | Benefits of Particle Physics |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Workforce Workforce Development In this Section: thumb Medicine thumb Homeland Security thumb Industry thumb Computing thumb Sciences thumb Workforce Development thumb A Growing List Training scientists Particle physics has a profound influence on the workforce. Basic science is a magnet that attracts inquisitive and capable students. In particle physics, roughly one sixth of those completing PhDs ultimately pursue careers in basic high-energy physics research. The rest find their way to

  14. Trillion Particles,

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Trillion Particles, 120,000 cores, and 350 TBs: Lessons Learned from a Hero I/O Run on Hopper Surendra Byna ∗ , Andrew Uselton ∗ , Prabhat ∗ , David Knaak † , and Yun (Helen) He ∗ ∗ Lawrence Berkeley National Laboratory, USA. Email: {sbyna, acuselton, prabhat, yhe}@lbl.gov † Cray Inc., USA. Email: knaak@cray.com Abstract-Modern petascale applications can present a variety of configuration, runtime, and data management challenges when run at scale. In this paper, we describe our

  15. Microfabricated particle focusing device

    DOE Patents [OSTI]

    Ravula, Surendra K.; Arrington, Christian L.; Sigman, Jennifer K.; Branch, Darren W.; Brener, Igal; Clem, Paul G.; James, Conrad D.; Hill, Martyn; Boltryk, Rosemary June

    2013-04-23

    A microfabricated particle focusing device comprises an acoustic portion to preconcentrate particles over large spatial dimensions into particle streams and a dielectrophoretic portion for finer particle focusing into single-file columns. The device can be used for high throughput assays for which it is necessary to isolate and investigate small bundles of particles and single particles.

  16. Press Pass - Press Releases

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    would otherwise flood the particle detector with unwanted signals. The changeover from iron mining to mining the secrets of subatomic particles also provides economic stimulus...

  17. The Standard Model

    ScienceCinema (OSTI)

    Lincoln, Don

    2014-08-12

    Fermilab scientist Don Lincoln describes the Standard Model of particle physics, covering both the particles that make up the subatomic realm and the forces that govern them.

  18. Press Pass - Press Releases

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    schoolers were working to correct the calibration of the detection of certain particle jets that contain subatomic particles called muons. Lincoln had noted a problem in the...

  19. The Standard Model

    SciTech Connect (OSTI)

    Lincoln, Don

    2012-10-02

    Fermilab scientist Don Lincoln describes the Standard Model of particle physics, covering both the particles that make up the subatomic realm and the forces that govern them.

  20. Extending the Capabilities of Single Particle Mass Spectrometry: II. Measurements of Aerosol Particle Density without DMA

    SciTech Connect (OSTI)

    Vaden, Timothy D.; Imre, D.; Beranek, Josef; Zelenyuk, Alla

    2011-01-04

    Particle density is an important and useful property that is difficult to measure because it usually 5 requires separate instruments to measure two particle attributes. As density measurements are 6 often performed on size-classified particles, they are hampered by low particle numbers, and 7 hence poor temporal resolution. We present here a new method for measuring particle densities 8 using our single particle mass spectrometer, SPLAT. This method takes advantage of the fact 9 that the detection efficiency in our single particle mass spectrometer drops off very rapidly as the 10 particle size decreases below ~125 nm creating a distinct sharp feature on the small particle side 11 of the vacuum aerodynamic size distribution. Thus, the two quantities needed to determine 12 particle density, the particle diameter and vacuum aerodynamic diameter, are known. We first 13 test this method on particles of known composition and find that the densities it yields are 14 sufficiently accurate. We then apply the method to obtain the densities of particles that were 15 characterized during an airborne field campaign. In addition, we show that the distinctive 16 features of the vacuum aerodynamic size distribution can be used to characterize the instrument 17 detection efficiency as a function of particle size. In general, the method presented here reduces 18 complexity and yields information with high temporal resolution while the instrument is 19 collecting routine data on particle size and composition.

  1. Particle physics. Positrons ride the wave

    SciTech Connect (OSTI)

    Piot, Philippe

    2015-08-26

    Here, experiments reveal that positrons — the antimatter equivalents of electrons — can be rapidly accelerated using a plasma wave. The findings pave the way to high-energy electron–positron particle colliders.

  2. Particle physics. Positrons ride the wave

    SciTech Connect (OSTI)

    Piot, Philippe

    2015-08-26

    Experiments reveal that positrons — the antimatter equivalents of electrons — can be rapidly accelerated using a plasma wave. The findings pave the way to high-energy electron–positron particle colliders.

  3. The Future of Hadrons: The Nexus of Subatomic Physics

    SciTech Connect (OSTI)

    Quigg, Chris

    2011-09-01

    The author offers brief observations on matters discussed at the XIV International Conference on Hadron Spectroscopy and explore prospects for hadron physics. Quantum chromodynamics (QCD) has been validated as a new law of nature. It is internally consistent up to very high energies, and so could be a complete theory of the strong interactions. Whether QCD is the final answer for the strong interactions is a subject for continuing experimental tests, which are being extended in experimentation at the Large Hadron Collider. Beyond the comparison of perturbative calculations with experiment, it remains critically important to test the confinement hypothesis by searching for free quarks, or for signatures of unconfined color. Sensitive negative searches for quarks continue to be interesting, and the definitive observation of free quarks would be revolutionary. Breakdowns of factorization would compromise the utility of perturbative QCD. Other discoveries that would require small or large revisions to QCD include the observation of new kinds of colored matter beyond quarks and gluons, the discovery that quarks are composite, or evidence that SU(3){sub c} gauge symmetry is the vestige of a larger, spontaneously broken, color symmetry. While probing our underlying theory for weakness or new openings, we have plenty to do to apply QCD to myriad experimental settings, to learn its implications for matter under unusual conditions, and to become more adept at calculating its consequences. New experimental tools provide the means for progress on a very broad front.

  4. Brookhaven-Built Magnet Will Catch Subatomic Debris

    ScienceCinema (OSTI)

    Peter Wanderer

    2013-07-22

    Peter Wanderer, head of Brookhaven's Superconducting Magnet Division, describes the magnet that's being built for the Facility for Rare Isotope Beams at Michigan State University

  5. Advanced Characterization of Particles and Particle-Cell Interactions...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Characterization of Particles and Particle-Cell Interactions Advanced Characterization of Particles and Particle-Cell Interactions 2004 Diesel Engine Emissions Reduction (DEER) ...

  6. Finding of No Significant Impact

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    U.S. Department of Energy Finding of No Significant Impact 2 June 2001 This page intentionally left blank. U.S. Department of Energy Finding of No Significant Impact 12 June 2001 This page intentionally left blank.

  7. ARM - Research Highlights: Notable Findings

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    HighlightsNotable Research Findings Form Submit a New Research Highlight Sort Highlights Submitter Title Research Area Working Group Submission Date DOE Progress Reports Notable Research Findings for 2001-2006 Office of Science Abstracts Database Research Highlights Summaries Notable Research Findings for the Past Five Years Aerosols Cloud Parameterization and Modeling (Currently Cloud Modeling) Cloud Properties Instantaneous Radiative Flux (Currently Radiative Processes)

  8. Find R&D Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find technical reports, journal articles, accepted manuscripts, conference papers, patents, theses, books, multimedia, and data information. Use the basic or advanced search to get ...

  9. Particle capture device

    DOE Patents [OSTI]

    Jayne, John T.; Worsnop, Douglas R.

    2016-02-23

    In example embodiments, particle collection efficiency in aerosol analyzers and other particle measuring instruments is improved by a particle capture device that employs multiple collisions to decrease momentum of particles until the particles are collected (e.g., vaporized or come to rest). The particle collection device includes an aperture through which a focused particle beam enters. A collection enclosure is coupled to the aperture and has one or more internal surfaces against which particles of the focused beam collide. One or more features are employed in the collection enclosure to promote particles to collide multiple times within the enclosure, and thereby be vaporized or come to rest, rather than escape through the aperture.

  10. Laser particle sorter

    DOE Patents [OSTI]

    Martin, J.C.; Buican, T.N.

    1987-11-30

    Method and apparatus are provided for sorting particles, such as biological particles. A first laser is used to define an optical path having an intensity gradient which is effective to propel the particles along the path but which is sufficiently weak that the particles are not trapped in an axial direction. A probe laser beam is provided for interrogating the particles to identify predetermined phenotypical characteristics of the particles. A second laser beam is provided to intersect the driving first laser beam, wherein the second laser beam is activated by an output signal indicative of a predetermined characteristic. The second laser beam is switchable between a first intensity and a second intensity, where the first intensity is effective to displace selected particles from the driving laser beam and the second intensity is effective to propel selected particles along the deflection laser beam. The selected particles may then be propelled by the deflection beam to a location effective for further analysis. 2 figs.

  11. Laser particle sorter

    DOE Patents [OSTI]

    Martin, John C.; Buican, Tudor N.

    1989-01-01

    Method and apparatus for sorting particles, such as biological particles. A first laser defines an optical path having an intensity gradient which is effective to propel the particles along the path but which is sufficiently weak that the particles are not trapped in an axial direction. A probe laser beam interrogates the particles to identify predetermined phenotypical characteristics of the particles. A second laser beam intersects the driving first laser beam, wherein the second laser beam is activated by an output signal indicative of a predetermined characteristic. The second laser beam is switchable between a first intensity and a second intensity, where the first intensity is effective to displace selected particles from the driving laser beam and the second intensity is effective to propel selected particles along the deflection laser beam. The selected particles may then be propelled by the deflection beam to a location effective for further analysis.

  12. EA-1655: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    5: Finding of No Significant Impact EA-1655: Finding of No Significant Impact The Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development The Proposed Action would create and operate an experimental facility for further advancing the development of laser-driven, plasma-based, particle beam accelerators. An existing, approximately 7,000-square-foot, accelerator laboratory area inside Building 71 at Lawrence Berkeley National Laboratory (LBNL)

  13. High Speed Particle Image Velocimetry - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Energy Analysis Energy Analysis Find More Like This Return to Search High Speed Particle Image Velocimetry Simultaneously track the motion of high numbers of object images under extreme, high concentration conditions National Energy Technology Laboratory Contact NETL About This Technology Publications: PDF Document Publication Partnership Opportunity Notice: High Speed Particle Image Velocimetry (534 KB) Particle imaging Particle imaging <p> HSPI system recognizing and simultaneously

  14. Find a Job | Careers | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find a Job We're looking for scientists, research technicians, engineers, analysts, managers and project leaders, administrators, and communicators, along with information technology, security, facilities, and clerical/administrative support specialists. Interested in joining our team? Find your opportunity We're passionate about our mission-to develop clean energy and energy efficiency technologies and practices, advance related science and engineering, and provide knowledge and innovations to

  15. Fermilab | Science | Particle Accelerators

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Particle Accelerators PXIE As America's particle physics laboratory, Fermilab operates and builds powerful particle accelerators for investigating the smallest things human beings have ever observed. About 2,300 physicists from all over the world come to Fermilab to conduct experiments using particle accelerators. These machines not only drive discovery, they are themselves the subjects of research and innovation. Scientists and engineers at Fermilab actively advance accelerator science and

  16. Nanolipoprotein Particles for Hydrogen Production - Energy Innovation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Portal Hydrogen and Fuel Cell Hydrogen and Fuel Cell Find More Like This Return to Search Nanolipoprotein Particles for Hydrogen Production Lawrence Livermore National Laboratory Contact LLNL About This Technology Technology Marketing Summary Lawrence Livermore National Laboratory has developed a method using nanolipoprotein particles (NLP) to solubilize and isolate membrane bound hydrogenases for the biological production of hydrogen. Hydrogen is a renewable energy carrier that has the

  17. Physical Sciences

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and the universe around us. Physics Division researchers are studying these interactions from the outermost reaches of the cosmos, to the innermost confines of subatomic particles....

  18. Environmental Assessment for Cleanup and Closure of the Energy...

    Office of Environmental Management (EM)

    ... Activation Neutrons are electrically neutral subatomic particles. In a nuclear reactor, neutrons from uranium (contained in cylindrical fuel pellets and placed in fuel assemblies) ...

  19. Fermilab Today

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is concerned with manipulating objects the size of atoms and making molecular machines. Protons, electrons and other subatomic particles are hundreds of thousands of...

  20. EXO

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    designed to look for an ultra-rare phenomenon that could reveal key secrets about the nature of the neutrino. Neutrinos - meaning "small neutral ones" - are subatomic particles...

  1. The CMS Masterclass and Particle Physics Outreach

    SciTech Connect (OSTI)

    Cecire, Kenneth; Bardeen, Marjorie; McCauley, Thomas

    2014-01-01

    The CMS Masterclass enables high school students to analyse authentic CMS data. Students can draw conclusions on key ratios and particle masses by combining their analyses. In particular, they can use the ratio of W^+ to W^- candidates to probe the structure of the proton, they can find the mass of the Z boson, and they can identify additional particles including, tentatively, the Higgs boson. In the United States, masterclasses are part of QuarkNet, a long-term program that enables students and teachers to use cosmic ray and particle physics data for learning with an emphasis on data from CMS.

  2. Adhesive particle shielding

    DOE Patents [OSTI]

    Klebanoff, Leonard Elliott; Rader, Daniel John; Walton, Christopher; Folta, James

    2009-01-06

    An efficient device for capturing fast moving particles has an adhesive particle shield that includes (i) a mounting panel and (ii) a film that is attached to the mounting panel wherein the outer surface of the film has an adhesive coating disposed thereon to capture particles contacting the outer surface. The shield can be employed to maintain a substantially particle free environment such as in photolithographic systems having critical surfaces, such as wafers, masks, and optics and in the tools used to make these components, that are sensitive to particle contamination. The shield can be portable to be positioned in hard-to-reach areas of a photolithography machine. The adhesive particle shield can incorporate cooling means to attract particles via the thermophoresis effect.

  3. Peak finding using biorthogonal wavelets

    SciTech Connect (OSTI)

    Tan, C.Y.

    2000-02-01

    The authors show in this paper how they can find the peaks in the input data if the underlying signal is a sum of Lorentzians. In order to project the data into a space of Lorentzian like functions, they show explicitly the construction of scaling functions which look like Lorentzians. From this construction, they can calculate the biorthogonal filter coefficients for both the analysis and synthesis functions. They then compare their biorthogonal wavelets to the FBI (Federal Bureau of Investigations) wavelets when used for peak finding in noisy data. They will show that in this instance, their filters perform much better than the FBI wavelets.

  4. Writing audit findings: Be reasonable!

    SciTech Connect (OSTI)

    Girvin, N.W.

    1992-05-01

    A customary approach to auditing and reporting deficiencies is to keep a running list of those that are found, evaluate the severity of each, and based on the evidence, document findings or observations or concerns in an audit report. The report is issued and the auditee is normally requested to address ``root cause`` as part of their corrective action. This paper describes a ``root problems`` approach to documenting audit findings that is designed not only to put the QA auditor in a more favorable light, but to more effectively enable the auditee to identify root cause and meaningful corrective action. The positive results of this approach are considerable. You will have fewer findings but those you do have will be substantial. You will cite requirements that sound reasonable and make arguments difficult. If some of the supporting deficiencies (examples) prove to be incorrect, you will still have ample support for the original finding. You will be seen as reasonable individual who can help lead the auditee towards identification of root cause without taking away part of the responsibility. You even have a fair chance of fostering a sense of commitment to quality improvement on the auditee`s part. This in itself, is its own reward.

  5. Writing audit findings: Be reasonable

    SciTech Connect (OSTI)

    Girvin, N.W.

    1992-05-01

    A customary approach to auditing and reporting deficiencies is to keep a running list of those that are found, evaluate the severity of each, and based on the evidence, document findings or observations or concerns in an audit report. The report is issued and the auditee is normally requested to address root cause'' as part of their corrective action. This paper describes a root problems'' approach to documenting audit findings that is designed not only to put the QA auditor in a more favorable light, but to more effectively enable the auditee to identify root cause and meaningful corrective action. The positive results of this approach are considerable. You will have fewer findings but those you do have will be substantial. You will cite requirements that sound reasonable and make arguments difficult. If some of the supporting deficiencies (examples) prove to be incorrect, you will still have ample support for the original finding. You will be seen as reasonable individual who can help lead the auditee towards identification of root cause without taking away part of the responsibility. You even have a fair chance of fostering a sense of commitment to quality improvement on the auditee's part. This in itself, is its own reward.

  6. Find Internships | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Internships Find Internships Internships in energy efficiency and renewable energy-related fields, such as solar and fuel cells, energy efficiency, atmospheric sciences, ecology, global carbon cycles, climatology, and more, include EERE's own student internship program. Featured Internships Clean Cities University Workforce Development Program Clean Cities logo Science Undergraduate Laboratory Internships (SULI) Fall 2013 Picture of tow people in a labratory working Minority Educational

  7. Fermilab | Science | Particle Physics 101

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Particle Physics 101 Photo Have you ever wondered how often you could split a grain of sand into smaller pieces? Have you asked yourself what the sky is made of? Perhaps you have dreamed of traveling backwards in time? Physicists are as curious as you are. They look for answers to questions that people have pondered since they first began to wonder about the world and their place within it. You'll find some of the answers to these questions here. Explore the sections below to take a crash course

  8. CLASHING BEAM PARTICLE ACCELERATOR

    DOE Patents [OSTI]

    Burleigh, R.J.

    1961-04-11

    A charged-particle accelerator of the proton synchrotron class having means for simultaneously accelerating two separate contra-rotating particle beams within a single annular magnet structure is reported. The magnet provides two concentric circular field regions of opposite magnetic polarity with one field region being of slightly less diameter than the other. The accelerator includes a deflector means straddling the two particle orbits and acting to collide the two particle beams after each has been accelerated to a desired energy. The deflector has the further property of returning particles which do not undergo collision to the regular orbits whereby the particles recirculate with the possibility of colliding upon subsequent passages through the deflector.

  9. Methods for forming particles

    DOE Patents [OSTI]

    Fox, Robert V.; Zhang, Fengyan; Rodriguez, Rene G.; Pak, Joshua J.; Sun, Chivin

    2016-06-21

    Single source precursors or pre-copolymers of single source precursors are subjected to microwave radiation to form particles of a I-III-VI.sub.2 material. Such particles may be formed in a wurtzite phase and may be converted to a chalcopyrite phase by, for example, exposure to heat. The particles in the wurtzite phase may have a substantially hexagonal shape that enables stacking into ordered layers. The particles in the wurtzite phase may be mixed with particles in the chalcopyrite phase (i.e., chalcopyrite nanoparticles) that may fill voids within the ordered layers of the particles in the wurtzite phase thus produce films with good coverage. In some embodiments, the methods are used to form layers of semiconductor materials comprising a I-III-VI.sub.2 material. Devices such as, for example, thin-film solar cells may be fabricated using such methods.

  10. Precision gap particle separator

    DOE Patents [OSTI]

    Benett, William J.; Miles, Robin; Jones, II., Leslie M.; Stockton, Cheryl

    2004-06-08

    A system for separating particles entrained in a fluid includes a base with a first channel and a second channel. A precision gap connects the first channel and the second channel. The precision gap is of a size that allows small particles to pass from the first channel into the second channel and prevents large particles from the first channel into the second channel. A cover is positioned over the base unit, the first channel, the precision gap, and the second channel. An port directs the fluid containing the entrained particles into the first channel. An output port directs the large particles out of the first channel. A port connected to the second channel directs the small particles out of the second channel.

  11. FINDING OF NO SIGNIFICANT IMPACT

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    COMMERCIAL DEMONSTRATION OF THE MANUFACTURED AGGREGATE PROCESSING TECHNOLOGY UTILIZING SPRAY DRYER ASH 1 AGENCY: U.S. Department of Energy (DOE) ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The DOE has prepared an Environmental Assessment (EA), DOE/EA-1449, to analyze the potential environmental consequences of participating in a cooperative agreement with Universal Aggregates, LLC, for the design, construction, and operation of a plant to manufacture lightweight aggregates. The

  12. Find Jobs | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Jobs Find Jobs Clean energy jobs can be found in the public, private, and nonprofit sectors and can range from entry-level to professional positions in a wide range of fields. This section can help you familiarize yourself with different types of green energy jobs as you begin your search for a job that meets your interests and skills. EERE Career Opportunities EERE Career Opportunities Energy Efficency and Renewable Energy, the DOE office leading the nation's effort to enhance energy efficiency

  13. Fermilab | Science | Particle Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Particle Physics photo At Fermilab, a robust scientific program pursues answers to key questions about the laws of nature and the cosmos. The challenge of particle physics is to discover what the universe is made of and how it works. By building some of the largest and most complex machines in the world, Fermilab scientists expand humankind's understanding of matter, energy, space and time. Fermilab is at the forefront of research into neutrinos, ubiquitous but hard-to-catch particles that might

  14. Sandia Energy - Particle Diagnostics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of combustion-generated particles with fast time response and high sensitivity. Measurement techniques are targeted for studies of soot formation and evolution and must...

  15. Bioactivation of particles

    DOE Patents [OSTI]

    Pinaud, Fabien; King, David; Weiss, Shimon

    2011-08-16

    Particles are bioactivated by attaching bioactivation peptides to the particle surface. The bioactivation peptides are peptide-based compounds that impart one or more biologically important functions to the particles. Each bioactivation peptide includes a molecular or surface recognition part that binds with the surface of the particle and one or more functional parts. The surface recognition part includes an amino-end and a carboxy-end and is composed of one or more hydrophobic spacers and one or more binding clusters. The functional part(s) is attached to the surface recognition part at the amino-end and/or said carboxy-end.

  16. Particle Physics Outreach to Secondary Education

    SciTech Connect (OSTI)

    Bardeen, Marjorie G.; Johansson, K.Erik; Young, M.Jean

    2011-11-21

    This review summarizes exemplary secondary education and outreach programs of the particle physics community. We examine programs from the following areas: research experiences, high-energy physics data for students, informal learning for students, instructional resources, and professional development. We report findings about these programs' impact on students and teachers and provide suggestions for practices that create effective programs from those findings. We also include some methods for assessing programs.

  17. RESEARCH IN PARTICLE PHYSICS

    SciTech Connect (OSTI)

    Kearns, Edward

    2013-07-12

    This is the final report for the Department of Energy Grant to Principal Investigators in Experimental and Theoretical Particle Physics at Boston University. The research performed was in the Energy Frontier at the LHC, the Intensity Frontier at Super-Kamiokande and T2K, the Cosmic Frontier and detector R&D in dark matter detector development, and in particle theory.

  18. DEM Particle Fracture Model

    SciTech Connect (OSTI)

    Zhang, Boning; Herbold, Eric B.; Homel, Michael A.; Regueiro, Richard A.

    2015-12-01

    An adaptive particle fracture model in poly-ellipsoidal Discrete Element Method is developed. The poly-ellipsoidal particle will break into several sub-poly-ellipsoids by Hoek-Brown fracture criterion based on continuum stress and the maximum tensile stress in contacts. Also Weibull theory is introduced to consider the statistics and size effects on particle strength. Finally, high strain-rate split Hopkinson pressure bar experiment of silica sand is simulated using this newly developed model. Comparisons with experiments show that our particle fracture model can capture the mechanical behavior of this experiment very well, both in stress-strain response and particle size redistribution. The effects of density and packings o the samples are also studied in numerical examples.

  19. HIGH ENERGY PARTICLE ACCELERATOR

    DOE Patents [OSTI]

    Courant, E.D.; Livingston, M.S.; Snyder, H.S.

    1959-04-14

    An improved apparatus is presented for focusing charged particles in an accelerator. In essence, the invention includes means for establishing a magnetic field in discrete sectors along the path of moving charged particles, the magnetic field varying in each sector in accordance with the relation. B = B/ sub 0/ STAln (r-r/sub 0/)/r/sub 0/!, where B/sub 0/ is the value of the magnetic field at the equilibrium orbit of radius r/sub 0/ of the path of the particles, B equals the magnetic field at the radius r of the chamber and n equals the magnetic field gradient index, the polarity of n being abruptly reversed a plurality of times as the particles travel along their arcuate path. With this arrangement, the particles are alternately converged towards the axis of their equillbrium orbit and diverged therefrom in successive sectors with a resultant focusing effect.

  20. Imaging alpha particle detector

    DOE Patents [OSTI]

    Anderson, David F.

    1985-01-01

    A method and apparatus for detecting and imaging alpha particles sources is described. A conducting coated high voltage electrode (1) and a tungsten wire grid (2) constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source (3) to be quantitatively or qualitatively analyzed. A thin polyester film window (4) allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

  1. Imaging alpha particle detector

    DOE Patents [OSTI]

    Anderson, D.F.

    1980-10-29

    A method and apparatus for detecting and imaging alpha particles sources is described. A dielectric coated high voltage electrode and a tungsten wire grid constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source to be quantitatively or qualitatively analyzed. A thin polyester film window allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

  2. DOE Science Showcase - Exciting Higgs Boson Research | OSTI, US Dept of

    Office of Scientific and Technical Information (OSTI)

    Energy Office of Scientific and Technical Information Exciting Higgs Boson Research Image Credit: Claudia Marcelloni, CERN Some of the most exciting research happening in recent decades has been the observation and tentative confirmation of the elusive subatomic particle known as the Higgs boson at the Large Hadron Collider at CERN, Geneva, Switzerland. These findings, produced from one of the largest scientific experiments ever conducted, have provided a direction for the exploration and

  3. Slow Waveguide Structures for Particle Accelerators - Energy Innovation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Portal Energy Analysis Energy Analysis Electricity Transmission Electricity Transmission Early Stage R&D Early Stage R&D Find More Like This Return to Search Slow Waveguide Structures for Particle Accelerators Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryA waveguide design that can save time and money in the construction and tuning of a particle accelerator was developed by ORNL researchers. Particle accelerators use electromagnetic

  4. Charged particle accelerator grating

    DOE Patents [OSTI]

    Palmer, Robert B.

    1986-09-02

    A readily disposable and replaceable accelerator grating for a relativistic particle accelerator. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams into the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.

  5. Charged particle accelerator grating

    DOE Patents [OSTI]

    Palmer, Robert B.

    1986-01-01

    A readily disposable and replaceable accelerator grating for a relativistic particle accelerator. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams into the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.

  6. Apparatus for measuring particle properties

    DOE Patents [OSTI]

    Rader, D.J.; Castaneda, J.N.; Grasser, T.W.; Brockmann, J.E.

    1998-08-11

    An apparatus is described for determining particle properties from detected light scattered by the particles. The apparatus uses a light beam with novel intensity characteristics to discriminate between particles that pass through the beam and those that pass through an edge of the beam. The apparatus can also discriminate between light scattered by one particle and light scattered by multiple particles. The particle`s size can be determined from the intensity of the light scattered. The particle`s velocity can be determined from the elapsed time between various intensities of the light scattered. 11 figs.

  7. In-Situ Characterization of Cloud Condensation Nuclei, Interstitial, and background Particles using Single Particle Mass Spectrometer, SPLAT II

    SciTech Connect (OSTI)

    Zelenyuk, Alla; Imre, D.; Earle, Michael; Easter, Richard C.; Korolev, Alexei; Leaitch, W. R.; Liu, Peter; Macdonald, A. M.; Ovchinnikov, Mikhail; Strapp, Walter

    2010-10-01

    Aerosol indirect effect remains the most uncertain aspect of climate change modeling because proper test requires knowledge of individual particles sizes and compositions with high spatial and temporal resolution. We present the first deployment of a single particle mass spectrometer (SPLAT II) that is operated in a dual data acquisition mode to measure all the required individual particle properties with sufficient temporal resolution to definitively resolve the aerosol-cloud interaction in this exemplary case. We measured particle number concentrations, asphericity, and individual particle size, composition, and density with better than 60 seconds resolution. SPLAT II measured particle number concentrations between 70 particles cm-3and 300 particles cm-3, an average particle density of 1.4 g cm-3. Found that most particles are composed of oxygenated organics, many of which are mixed with sulfates. Biomass burn particles some with sulfates were prevalent, particularly at higher altitudes, and processed sea-salt was observed over the ocean. Analysis of cloud residuals shows that with time cloud droplets acquire sulfate by the reaction of peroxide with SO2. Based on the particle mass spectra and densities we find that the compositions of cloud condensation nuclei are similar to those of background aerosol but, contain on average ~7% more sulfate, and do not include dust and metallic particles. A comparison between the size distributions of background, activated, and interstitial particles shows that while nearly none of the activated particles is smaller than 115 nm, more than 80% of interstitial particles are smaller than 115 nm. We conclude that for this cloud the most important difference between CCN and background aerosol is particle size although having more sulfate also helps.

  8. Particle Physics Masterclass

    ScienceCinema (OSTI)

    Helio Takai

    2010-01-08

    Students from six local high schools -- Farmingdale, Sachem East, Shoreham, Smithtown East, Ward Melville, and William Floyd -- came to Brookhaven National Laboratory to experience research with particle physicist Helio Takai. They were among more than 6,

  9. Accelerating Particles with Plasma

    SciTech Connect (OSTI)

    Litos, Michael; Hogan, Mark

    2014-11-05

    Researchers at SLAC explain how they use plasma wakefields to accelerate bunches of electrons to very high energies over only a short distance. Their experiments offer a possible path for the future of particle accelerators.

  10. Safe biodegradable fluorescent particles

    DOE Patents [OSTI]

    Martin, Sue I.; Fergenson, David P.; Srivastava, Abneesh; Bogan, Michael J.; Riot, Vincent J.; Frank, Matthias

    2010-08-24

    A human-safe fluorescence particle that can be used for fluorescence detection instruments or act as a safe simulant for mimicking the fluorescence properties of microorganisms. The particle comprises a non-biological carrier and natural fluorophores encapsulated in the non-biological carrier. By doping biodegradable-polymer drug delivery microspheres with natural or synthetic fluorophores, the desired fluorescence can be attained or biological organisms can be simulated without the associated risks and logistical difficulties of live microorganisms.

  11. ELEMENTARY PARTICLE INTERACTIONS

    SciTech Connect (OSTI)

    EFREMENKO, YURI; HANDLER, THOMAS; KAMYSHKOV, YURI; SIOPSIS, GEORGE; SPANIER, STEFAN

    2013-07-30

    The High-Energy Elementary Particle Interactions group at UT during the last three years worked on the following directions and projects: Collider-based Particle Physics; Neutrino Physics, particularly participation in “NO?A”, “Double Chooz”, and “KamLAND” neutrino experiments; and Theory, including Scattering amplitudes, Quark-gluon plasma; Holographic cosmology; Holographic superconductors; Charge density waves; Striped superconductors; and Holographic FFLO states.

  12. Small Particles, Big Impact

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Small Particles, Big Impact Small Particles, Big Impact Small-scale effects of Aerosols Add up Over Time August 24, 2011 Linda Vu, lvu@lbl.gov, +1 510 495 2402 High-resolution simulation for Mexico City (top), shows a more detailed and accurate picture of aerosol pollution compared to representations of a global climate model (bottom). The deep red to light green colors represent concentrations of aerosol pollution with red being highest, light green lowest. Using systems at the National Energy

  13. Regional Transmission Projects: Finding Solutions

    SciTech Connect (OSTI)

    The Keystone Center

    2005-06-15

    The Keystone Center convened and facilitated a year-long Dialogue on "Regional Transmission Projects: Finding Solutions" to develop recommendations that will help address the difficult and contentious issues related to expansions of regional electric transmission systems that are needed for reliable and economic transmission of power within and across regions. This effort brought together a cross-section of affected stakeholders and thought leaders to address the problem with the collective wisdom of their experience and interests. Transmission owners sat at the table with consumer advocates and environmental organizations. Representatives from regional transmission organizations exchanged ideas with state and federal regulators. Generation developers explored common interests with public power suppliers. Together, the Dialogue participants developed consensus solutions about how to begin unraveling some of the more intractable issues surrounding identification of need, allocation of costs, and reaching consensus on siting issues that can frustrate the development of regional transmission infrastructure. The recommendations fall into three broad categories: 1. Recommendations on appropriate institutional arrangements and processes for achieving regional consensus on the need for new or expanded transmission infrastructure 2. Recommendations on the process for siting of transmission lines 3. Recommendations on the tools needed to support regional planning, cost allocation, and siting efforts. List of Dialogue participants: List of Dialogue Participants: American Electric Power American Transmission Company American Wind Energy Association California ISO Calpine Corporation Cinergy Edison Electric Institute Environmental Defense Federal Energy Regulatory Commission Great River Energy International Transmission Company ISO-New England Iowa Public Utility Board Kanner & Associates Midwest ISO National Association of Regulatory Utility Commissioners National Association

  14. Inquiring Minds - Questions About Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Forces and Interactions Strong, weak, electromagnetic and gravitational, particle-wave dualism Photons in Electromagnetic Interactions How does the exchange of virtual photons as per QED explain the electrostatic attraction of particles of opposite charge? What is gravity? Is gravity a particle or a wave? Is the concept of gravity the same as a subatomic Graviton? Can it be a particle or a wave? Or both? Electro-magnet I need to find out why the current effects the strength of an electro-magnet.

  15. ARM - Measurement - Cloud ice particle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    : Lear Jet PARTIMG : Particle imager UAV-PROTEUS-MICRO : Proteus Cloud Microphysics ... particle imager MET : Surface Meteorological Instrumentation UAV-PROTEUS : UAV Proteus

  16. Nuclear & Particle Physics, Astrophysics, Cosmology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nuclear & Particle Physics Nuclear & Particle Physics, Astrophysics, Cosmology National security depends on science and technology. The United States relies on Los Alamos National ...

  17. System for forming janus particles

    DOE Patents [OSTI]

    Hong, Liang; Jiang, Shan; Granick, Steve

    2011-01-25

    The invention is a method of forming Janus particles, that includes forming an emulsion that contains initial particles, a first liquid, and a second liquid; solidifying the first liquid to form a solid that contains at least a portion of the initial particles on a surface of the solid; and treating the exposed particle sides with a first surface modifying agent, to form the Janus particles. Each of the initial particles on the surface has an exposed particle side and a blocked particle side.

  18. Yoichiro Nambu and the Mechanism of Spontaneous Broken Symmetries in

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Subatomic Physics Yoichiro Nambu and the Mechanism of Spontaneous Broken Symmetries in Subatomic Physics Resources with Additional Information * Awards Yoichiro Nambu Credit: University of Chicago Yoichiro Nambu was awarded the 2008 Nobel Prize in Physics "for the discovery of the mechanism of spontaneous broken symmetry in subatomic physics". Nambu 'has revolutionized modern scientific ideas about the nature of the most fundamental particles and the space through which they move.

  19. Large Particle Titanate Sorbents

    SciTech Connect (OSTI)

    Taylor-Pashow, K.

    2015-10-08

    This research project was aimed at developing a synthesis technique for producing large particle size monosodium titanate (MST) to benefit high level waste (HLW) processing at the Savannah River Site (SRS). Two applications were targeted, first increasing the size of the powdered MST used in batch contact processing to improve the filtration performance of the material, and second preparing a form of MST suitable for deployment in a column configuration. Increasing the particle size should lead to improvements in filtration flux, and decreased frequency of filter cleaning leading to improved throughput. Deployment of MST in a column configuration would allow for movement from a batch process to a more continuous process. Modifications to the typical MST synthesis led to an increase in the average particle size. Filtration testing on dead-end filters showed improved filtration rates with the larger particle material; however, no improvement in filtration rate was realized on a crossflow filter. In order to produce materials suitable for column deployment several approaches were examined. First, attempts were made to coat zirconium oxide microspheres (196 ”m) with a layer of MST. This proved largely unsuccessful. An alternate approach was then taken synthesizing a porous monolith of MST which could be used as a column. Several parameters were tested, and conditions were found that were able to produce a continuous structure versus an agglomeration of particles. This monolith material showed Sr uptake comparable to that of previously evaluated samples of engineered MST in batch contact testing.

  20. Particle physics and cosmology

    SciTech Connect (OSTI)

    Kolb, E.W.

    1986-10-01

    This series of lectures is about the role of particle physics in physical processes that occurred in the very early stages of the bug gang. Of particular interest is the role of particle physics in determining the evolution of the early Universe, and the effect of particle physics on the present structure of the Universe. The use of the big bang as a laboratory for placing limits on new particle physics theories will also be discussed. Section 1 reviews the standard cosmology, including primordial nucleosynthesis. Section 2 reviews the decoupling of weakly interacting particles in the early Universe, and discusses neutrino cosmology and the resulting limits that may be placed on the mass and lifetime of massive neutrinos. Section 3 discusses the evolution of the vacuum through phase transitions in the early Universe and the formation of topological defects in the transitions. Section 4 covers recent work on the generation of the baryon asymmetry by baryon-number violating reactions in Grand Unified Theories, and mentions some recent work on baryon number violation effects at the electroweak transition. Section 5 is devoted to theories of cosmic inflation. Finally, Section 6 is a discussion of the role of extra spatial dimensions in the evolution of the early Universe. 78 refs., 32 figs., 6 tabs.

  1. Finding Hidden Oil and Gas Reserves

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Finding Hidden Oil and Gas Reserves Finding Hidden Oil and Gas Reserves Key Challenges: Seismic imaging methods, vital in our continuing search for deep offshore oil and gas...

  2. Airborne soil organic particles generated by precipitation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Wang, Bingbing; Harder, Tristan H.; Kelly, Stephen T.; Piens, Dominique S.; China, Swarup; Kovarik, Libor; Keiluweit, Marco; Arey, Bruce W.; Gilles, Mary K.; Laskin, Alexander

    2016-05-02

    Airborne organic particles play a critical role in Earth’s climate1, public health2, air quality3, and hydrological and carbon cycles4. However, sources and formation mechanisms for semi-solid and solid organic particles5 are poorly understood and typically neglected in atmospheric models6. Laboratory evidence suggests that fine particles can be formed from impaction of mineral surfaces by droplets7. Here, we use chemical imaging of particles collected following rain events in the Southern Great Plains, Oklahoma, USA and after experimental irrigation to show that raindrop impaction of soils generates solid organic particles. We find that after rain events, sub-micrometre solid particles, with a chemicalmore » composition consistent with soil organic matter, contributed up to 60% of atmospheric particles. Our irrigation experiments indicate that intensive water impaction is sufficient to cause ejection of airborne soil organic particles from the soil surface. Chemical imaging and micro-spectroscopy analysis of particle physico-chemical properties suggest that these particles may have important impacts on cloud formation and efficiently absorb solar radiation. Lastly, we suggest that raindrop-induced formation of solid organic particles from soils may be a widespread phenomenon in ecosystems such as agricultural systems and grasslands where soils are exposed to strong, episodic precipitation events8.« less

  3. Precision wood particle feedstocks

    DOE Patents [OSTI]

    Dooley, James H; Lanning, David N

    2013-07-30

    Wood particles having fibers aligned in a grain, wherein: the wood particles are characterized by a length dimension (L) aligned substantially parallel to the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L; the L.times.H dimensions define two side surfaces characterized by substantially intact longitudinally arrayed fibers; the W.times.H dimensions define two cross-grain end surfaces characterized individually as aligned either normal to the grain or oblique to the grain; the L.times.W dimensions define two substantially parallel top and bottom surfaces; and, a majority of the W.times.H surfaces in the mixture of wood particles have end checking.

  4. Charged particle accelerator grating

    DOE Patents [OSTI]

    Palmer, R.B.

    1985-09-09

    A readily disposable and replaceable accelerator grating for a relativistic particle accelerator is described. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams onto the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.

  5. Biological particle identification apparatus

    DOE Patents [OSTI]

    Salzman, Gary C.; Gregg, Charles T.; Grace, W. Kevin; Hiebert, Richard D.

    1989-01-01

    An apparatus and method for making multiparameter light scattering measurements from suspensions of biological particles is described. Fourteen of the sixteen Mueller matrix elements describing the particles under investigation can be substantially individually determined as a function of scattering angle and probing radiations wavelength, eight elements simultaneously for each of two apparatus configurations using an apparatus which incluees, in its simplest form, two polarization modulators each operating at a chosen frequency, one polarizer, a source of monochromatic electromagnetic radiation, a detector sensitive to the wavelength of radiation employed, eight phase-sensitive detectors, and appropriate electronics. A database of known biological particle suspensions can be assembled, and unknown samples can be quickly identified once measurements are performed on it according to the teachings of the subject invention, and a comparison is made with the database.

  6. Carbon-particle generator

    DOE Patents [OSTI]

    Hunt, A.J.

    1982-09-29

    A method and apparatus whereby small carbon particles are made by pyrolysis of a mixture of acetylene carried in argon. The mixture is injected through a nozzle into a heated tube. A small amount of air is added to the mixture. In order to prevent carbon build-up at the nozzle, the nozzle tip is externally cooled. The tube is also elongated sufficiently to assure efficient pyrolysis at the desired flow rates. A key feature of the method is that the acetylene and argon, for example, are premixed in a dilute ratio, and such mixture is injected while cool to minimize the agglomeration of the particles, which produces carbon particles with desired optical properties for use as a solar radiant heat absorber.

  7. Carl Gagliardi Modern Particle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Carl Gagliardi Modern Particle Accelerators and Detectors A Household Survey Carl A. Gagliardi 2 Carl Gagliardi Alyson Clarke * High school All Star swimmer * My niece To do well in her sport, she really needs to know how to ACCELERATE 3 Carl Gagliardi Deena Greer * Physician * My wife To ACCELERATE healing, she needs to DETECT problems that are impossible to see 4 Carl Gagliardi How Do We Accelerate? Let's ask Alyson We drop things! 5 Carl Gagliardi How Do We "Drop" Particles? We can

  8. Amorphous silicon ionizing particle detectors

    DOE Patents [OSTI]

    Street, R.A.; Mendez, V.P.; Kaplan, S.N.

    1988-11-15

    Amorphous silicon ionizing particle detectors having a hydrogenated amorphous silicon (a--Si:H) thin film deposited via plasma assisted chemical vapor deposition techniques are utilized to detect the presence, position and counting of high energy ionizing particles, such as electrons, x-rays, alpha particles, beta particles and gamma radiation. 15 figs.

  9. Amorphous silicon ionizing particle detectors

    DOE Patents [OSTI]

    Street, Robert A.; Mendez, Victor P.; Kaplan, Selig N.

    1988-01-01

    Amorphous silicon ionizing particle detectors having a hydrogenated amorphous silicon (a--Si:H) thin film deposited via plasma assisted chemical vapor deposition techniques are utilized to detect the presence, position and counting of high energy ionizing particles, such as electrons, x-rays, alpha particles, beta particles and gamma radiation.

  10. Canfield's Couplet Clues for Finding Superconductors

    ScienceCinema (OSTI)

    Canfield, Paul

    2015-06-30

    Ames Laboratory scientist, Paul Canfield, summarizes his thoughts about finding new superconducting materials.

  11. Canfield's Couplet Clues for Finding Superconductors

    SciTech Connect (OSTI)

    Canfield, Paul

    2015-04-28

    Ames Laboratory scientist, Paul Canfield, summarizes his thoughts about finding new superconducting materials.

  12. Apparatus for measuring particle properties

    DOE Patents [OSTI]

    Rader, Daniel J.; Castaneda, Jaime N.; Grasser, Thomas W.; Brockmann, John E.

    1998-01-01

    An apparatus for determining particle properties from detected light scattered by the particles. The apparatus uses a light beam with novel intensity characteristics to discriminate between particles that pass through the beam and those that pass through an edge of the beam. The apparatus can also discriminate between light scattered by one particle and light scattered by multiple particles. The particle's size can be determined from the intensity of the light scattered. The particle's velocity can be determined from the elapsed time between various intensities of the light scattered.

  13. Elementary particle interactions

    SciTech Connect (OSTI)

    Bugg, W.M.; Condo, G.T.; Handler, T.; Hart, E.L.; Ward, B.F.L.; Close, F.E.; Christophorou, L.G.

    1990-10-01

    This report discusses freon bubble chamber experiments exposed to {mu}{sup +} and neutrinos, photon-proton interactions; shower counter simulations; SLD detectors at the Stanford Linear Collider, and the detectors at the Superconducting Super Collider; elementary particle interactions; physical properties of dielectric materials used in High Energy Physics detectors; and Nuclear Physics. (LSP)

  14. Battery Particle Simulation

    SciTech Connect (OSTI)

    2014-09-15

    Two simulations show the differences between a battery being drained at a slower rate, over a full hour, versus a faster rate, only six minutes (a tenth of an hour). In both cases battery particles go from being fully charged (green) to fully drained (red), but there are significant differences in the patterns of discharge based on the rate.

  15. Movement of particles using sequentially activated dielectrophoretic particle trapping

    DOE Patents [OSTI]

    Miles, Robin R.

    2004-02-03

    Manipulation of DNA and cells/spores using dielectrophoretic (DEP) forces to perform sample preparation protocols for polymerized chain reaction (PCR) based assays for various applications. This is accomplished by movement of particles using sequentially activated dielectrophoretic particle trapping. DEP forces induce a dipole in particles, and these particles can be trapped in non-uniform fields. The particles can be trapped in the high field strength region of one set of electrodes. By switching off this field and switching on an adjacent electrodes, particles can be moved down a channel with little or no flow.

  16. Experimental Particle Physics

    SciTech Connect (OSTI)

    Rosenfeld, Carl; Mishra, Sanjib R.; Petti, Roberto; Purohit, Milind V.

    2014-08-31

    The high energy physics group at the University of South Carolina, under the leadership of Profs. S.R. Mishra, R. Petti, M.V. Purohit, J.R. Wilson (co-PI's), and C. Rosenfeld (PI), engaged in studies in "Experimental Particle Physics." The group collaborated with similar groups at other universities and at national laboratories to conduct experimental studies of elementary particle properties. We utilized the particle accelerators at the Fermi National Accelerator Laboratory (Fermilab) in Illinois, the Stanford Linear Accelerator Center (SLAC) in California, and the European Center for Nuclear Research (CERN) in Switzerland. Mishra, Rosenfeld, and Petti worked predominantly on neutrino experiments. Experiments conducted in the last fifteen years that used cosmic rays and the core of the sun as a source of neutrinos showed conclusively that, contrary to the former conventional wisdom, the "flavor" of a neutrino is not immutable. A neutrino of flavor "e," "mu," or "tau," as determined from its provenance, may swap its identity with one of the other flavors -- in our jargon, they "oscillate." The oscillation phenomenon is extraordinarily difficult to study because neutrino interactions with our instruments are exceedingly rare -- they travel through the earth mostly unimpeded -- and because they must travel great distances before a substantial proportion have made the identity swap. Three of the experiments that we worked on, MINOS, NOvA, and LBNE utilize a beam of neutrinos from an accelerator at Fermilab to determine the parameters governing the oscillation. Two other experiments that we worked on, NOMAD and MIPP, provide measurements supportive of the oscillation experiments. Good measurements of the neutrino oscillation parameters may constitute a "low energy window" on related phenomena that are otherwise unobservable because they would occur only at energies way above the reach of conceivable accelerators. Purohit and Wilson participated in the BaBar experiment

  17. R&D carries story on Ames Lab fermion finding | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    R&D carries story on Ames Lab fermion finding R&D Magazine posted a story on Ames Laboratory researchers' discovery of a new type of Weyl semimetal, a material that opens the way for further study of Weyl fermions, a type of massless elementary particle hypothesized by high-energy particle theory and potentially useful for creating high-speed electronic circuits and quantum computers. A combination of angle resolved photoemission spectroscopy (ARPES), modelling, density functional theory

  18. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, V.

    1992-12-15

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution is disclosed. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector. 12 figs.

  19. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, Victor

    1992-01-01

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector.

  20. Particle measurement systems and methods

    DOE Patents [OSTI]

    Steele, Paul T.

    2011-10-04

    A system according to one embodiment includes a light source for generating light fringes; a sampling mechanism for directing a particle through the light fringes; and at least one light detector for detecting light scattered by the particle as the particle passes through the light fringes. A method according to one embodiment includes generating light fringes using a light source; directing a particle through the light fringes; and detecting light scattered by the particle as the particle passes through the light fringes using at least one light detector.

  1. TE Connectivity Finds Answers in Tomography

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    TE Connectivity Finds Answers in Tomography TE Connectivity Finds Answers in Tomography Print Thursday, 22 August 2013 10:50 TE Connectivity is a world leader in connectivity-the...

  2. PARTICLE BEAM TRACKING CIRCUIT

    DOE Patents [OSTI]

    Anderson, O.A.

    1959-05-01

    >A particle-beam tracking and correcting circuit is described. Beam induction electrodes are placed on either side of the beam, and potentials induced by the beam are compared in a voltage comparator or discriminator. This comparison produces an error signal which modifies the fm curve at the voltage applied to the drift tube, thereby returning the orbit to the preferred position. The arrangement serves also to synchronize accelerating frequency and magnetic field growth. (T.R.H.)

  3. falling-particle receiver

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    falling-particle receiver - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management Programs Advanced

  4. Dynamic radioactive particle source

    DOE Patents [OSTI]

    Moore, Murray E.; Gauss, Adam Benjamin; Justus, Alan Lawrence

    2012-06-26

    A method and apparatus for providing a timed, synchronized dynamic alpha or beta particle source for testing the response of continuous air monitors (CAMs) for airborne alpha or beta emitters is provided. The method includes providing a radioactive source; placing the radioactive source inside the detection volume of a CAM; and introducing an alpha or beta-emitting isotope while the CAM is in a normal functioning mode.

  5. Fermilab | Science | Particle Physics | More fundamental particles and

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    forces More fundamental particles and forces Fermilab is America's premier national laboratory for particle physics research. Particle physicists seek to understand the very building blocks of our universe-the smallest bits of matter and how they interact. Experiments at Fermilab use cutting-edge accelerator and detector technology to learn the secrets of these elementary particles and forces. For decades, thousands of scientists from universities and laboratories around the world have

  6. Particle Theory & Cosmology

    SciTech Connect (OSTI)

    Shafi, Qaisar; Barr, Steven; Gaisser, Thomas; Stanev, Todor

    2015-03-31

    1. Executive Summary (April 1, 2012 - March 31, 2015) Title: Particle Theory, Particle Astrophysics and Cosmology Qaisar Shafi University of Delaware (Principal Investigator) Stephen M. Barr, University of Delaware (Co-Principal Investigator) Thomas K. Gaisser, University of Delaware (Co-Principal Investigator) Todor Stanev, University of Delaware (Co-Principal Investigator) The proposed research was carried out at the Bartol Research included Professors Qaisar Shafi Stephen Barr, Thomas K. Gaisser, and Todor Stanev, two postdoctoral fellows (Ilia Gogoladze and Liucheng Wang), and several graduate students. Five students of Qaisar Shafi completed their PhD during the period August 2011 - August 2014. Measures of the group’s high caliber performance during the 2012-2015 funding cycle included pub- lications in excellent refereed journals, contributions to working groups as well as white papers, and conference activities, which together provide an exceptional record of both individual performance as well as overall strength. Another important indicator of success is the outstanding quality of the past and current cohort of graduate students. The PhD students under our supervision regularly win the top departmental and university awards, and their publications records show excellence both in terms of quality and quantity. The topics covered under this grant cover the frontline research areas in today’s High Energy Theory & Phenomenology. For Professors Shafi and Barr they include LHC related topics including supersymmetry, collider physics, fl vor physics, dark matter physics, Higgs boson and seesaw physics, grand unifi and neutrino physics. The LHC two years ago discovered the Standard Model Higgs boson, thereby at least partially unlocking the secrets behind electroweak symmetry breaking. We remain optimistic that new and exciting physics will be found at LHC 14, which explain our focus on physics beyond the Standard Model. Professors Shafi continued his

  7. Role of quantum statistics in multi-particle decay dynamics

    SciTech Connect (OSTI)

    Marchewka, Avi; Granot, Er’el

    2015-04-15

    The role of quantum statistics in the decay dynamics of a multi-particle state, which is suddenly released from a confining potential, is investigated. For an initially confined double particle state, the exact dynamics is presented for both bosons and fermions. The time-evolution of the probability to measure two-particle is evaluated and some counterintuitive features are discussed. For instance, it is shown that although there is a higher chance of finding the two bosons (as oppose to fermions, and even distinguishable particles) at the initial trap region, there is a higher chance (higher than fermions) of finding them on two opposite sides of the trap as if the repulsion between bosons is higher than the repulsion between fermions. The results are demonstrated by numerical simulations and are calculated analytically in the short-time approximation. Furthermore, experimental validation is suggested.

  8. Particle-free microchip processing

    DOE Patents [OSTI]

    Geller, Anthony S.; Rader, Daniel J.

    1996-01-01

    Method and apparatus for reducing particulate contamination in microchip processing are disclosed. The method and apparatus comprise means to reduce particle velocity toward the wafer before the particles can be deposited on the wafer surface. A reactor using electric fields to reduce particle velocity and prevent particulate contamination is disclosed. A reactor using a porous showerhead to reduce particle velocities and prevent particulate contamination is disclosed.

  9. Particle-free microchip processing

    DOE Patents [OSTI]

    Geller, A.S.; Rader, D.J.

    1996-06-04

    Method and apparatus for reducing particulate contamination in microchip processing are disclosed. The method and apparatus comprise means to reduce particle velocity toward the wafer before the particles can be deposited on the wafer surface. A reactor using electric fields to reduce particle velocity and prevent particulate contamination is disclosed. A reactor using a porous showerhead to reduce particle velocities and prevent particulate contamination is disclosed. 5 figs.

  10. Apparatus for separating particles utilizing engineered acoustic contrast capture particles

    DOE Patents [OSTI]

    Kaduchak, Gregory; Ward, Michael D

    2016-05-17

    An apparatus for separating particles from a medium includes a capillary defining a flow path therein that is in fluid communication with a medium source. The medium source includes engineered acoustic contrast capture particle having a predetermined acoustic contrast. The apparatus includes a vibration generator that is operable to produce at least one acoustic field within the flow path. The acoustic field produces a force potential minima for positive acoustic contrast particles and a force potential minima for negative acoustic contrast particles in the flow path and drives the engineered acoustic contrast capture particles to either the force potential minima for positive acoustic contrast particles or the force potential minima for negative acoustic contrast particles.

  11. Apparatus for separating particles utilizing engineered acoustic contrast capture particles

    DOE Patents [OSTI]

    Kaduchak, Gregory; Ward, Michael D.

    2011-12-27

    An apparatus for separating particles from a medium includes a capillary defining a flow path therein that is in fluid communication with a medium source. The medium source includes engineered acoustic contrast capture particle having a predetermined acoustic contrast. The apparatus includes a vibration generator that is operable to produce at least one acoustic field within the flow path. The acoustic field produces a force potential minima for positive acoustic contrast particles and a force potential minima for negative acoustic contrast particles in the flow path and drives the engineered acoustic contrast capture particles to either the force potential minima for positive acoustic contrast particles or the force potential minima for negative acoustic contrast particles.

  12. Apparatus for separating particles utilizing engineered acoustic contrast capture particles

    DOE Patents [OSTI]

    Kaduchak, Gregory; Ward, Michael D

    2014-10-21

    An apparatus for separating particles from a medium includes a capillary defining a flow path therein that is in fluid communication with a medium source. The medium source includes engineered acoustic contrast capture particle having a predetermined acoustic contrast. The apparatus includes a vibration generator that is operable to produce at least one acoustic field within the flow path. The acoustic field produces a force potential minima for positive acoustic contrast particles and a force potential minima for negative acoustic contrast particles in the flow path and drives the engineered acoustic contrast capture particles to either the force potential minima for positive acoustic contrast particles or the force potential minima for negative acoustic contrast particles.

  13. Real-Time Airborne Particle Analyzer - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find More Like This Return to Search Real-Time Airborne Particle Analyzer Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing Summary Particle analysis is useful for determining chemical compositions in a wide range of disciplines, from ascertaining the source of a petroleum sample to duplicating a fragrance. The technique is appealing to a broad cross section of analytical sciences, but its applications are limited because, for existing equipment, sample size

  14. Hadron particle theory

    SciTech Connect (OSTI)

    Alonso, J.R.

    1995-05-01

    Radiation therapy with ``hadrons`` (protons, neutrons, pions, ions) has accrued a 55-year track record, with by now over 30,000 patients having received treatments with one of these particles. Very good, and in some cases spectacular results are leading to growth in the field in specific well-defined directions. The most noted contributor to success has been the ability to better define and control the radiation field produced with these particles, to increase the dose delivered to the treatment volume while achieving a high degree of sparing of normal tissue. An additional benefit is the highly-ionizing, character of certain beams, leading to creater cell-killing potential for tumor lines that have historically been very resistant to radiation treatments. Until recently these treatments have been delivered in laboratories and research centers whose primary, or original mission was physics research. With maturity in the field has come both the desire to provide beam facilities more accessible to the clinical setting, of a hospital, as well as achieving, highly-efficient, reliable and economical accelerator and beam-delivery systems that can make maximum advantage of the physical characteristics of these particle beams. Considerable work in technology development is now leading, to the implementation of many of these ideas, and a new generation of clinically-oriented facilities is beginning to appear. We will discuss both the physical, clinical and technological considerations that are driving these designs, as well as highlighting, specific examples of new facilities that are either now treating, patients or that will be doing so in the near future.

  15. Analysis of ``soft`` recovered shaped charge jet particles

    SciTech Connect (OSTI)

    Lassila, D.H.; Nikkel, D.J. Jr.; Kershaw, R.P.; Walters, W.P.

    1996-04-01

    A shaped charge with an 81 mm diameter, 42{degree} apex angle oxygen-free high-conductivity (OFHC) copper conical liner was fired into a ``soft`` recovery bunker to allow metallurgical examination of recovered jet particles and the slug. The initial weight of the copper liner was 245 g, of which 184 g was recovered. The number of jet particles recovered was 37 (approximately 63% of the particles formed by the charge). Extensive metallurgical analyses were performed on the recovered slug and jet particles. The microstructural features associated with voids, e.g., dendritic grain growth, clearly indicate that the regions in the vicinity of the centerline of the slug and jet particles were melted. In this work the authors present calculations of jet temperature as a function of constitutive behavior. In order to predict melt in the center region of the jet they find it necessary to scale flow stress with a pressure dependent shear modulus.

  16. Particle Distribution Modification by Low Amplitude Modes

    SciTech Connect (OSTI)

    White, R. B.; Gorelenkov, N.; Heidbrink, W. W.; Van Zeeland, M. A.

    2009-08-28

    Modification of a high energy particle distribution by a spectrum of low amplitude modes is investigated using a guiding center code. Only through resonance are modes effective in modifying the distribution. Diagnostics are used to illustrate the mode-particle interaction and to find which effects are relevant in producing significant resonance, including kinetic Poincare plots and plots showing those orbits with time averaged mode-particle energy transfer. Effects of pitch angle scattering and drag are studied, as well as plasma rotation and time dependence of the equilibrium and mode frequencies. A specific example of changes observed in a DIII-D deuterium beam distribution in the presence of low amplitude experimentally validated Toroidal Alfven (TAE) eigenmodes and Reversed Shear Alfven (RSAE) eigenmodes is examined in detail. Comparison with experimental data shows that multiple low amplitude modes can account for significant modification of high energy beam particle distributions. It is found that there is a stochastic threshold for beam profile modification, and that the experimental amplitudes are only slightly above this threshold.

  17. The Morphology of Emulsion Polymerized Latex Particles

    DOE R&D Accomplishments [OSTI]

    Wignall, G. D.; Ramakrishnan, V. R.; Linne, M. A.; Klein, A.; Sperling, L. H.; Wai, M. P.; Gelman, R. A.; Fatica, M. G.; Hoerl, R. H.; Fisher, L. W.

    1987-11-01

    Under monomer starved feed conditions, emulsion polymerization of perdeuterated methyl methacrylate and styrene in the presence of preformed polymethylmethacrylate latexes resulted in particles with a core-shell morphology, as determined by small-angle neutron scattering (SANS) analysis for a hollow sphere. The locus of polymerization of the added deuterated monomer is therefore at the particle surface. In similar measurements a statistical copolymer of styrene and methyl methacrylate was used as seed particles for further polymerization of trideuteromethyl methacrylate. The resulting polymer latex was again shown to have a core-shell morphological structure as determined by SANS. SANS experiments were also undertaken on polystyrene latexes polymerized by equilibrium swelling methods, with deuterated polymer forming the first or second step. The experiments covered a molecular weight range of 6 x 10{sup 4} 10{sup 6} the molecular weights are consistent with the experimental errors, indicating that the deuterium labeled molecules are randomly distributed in the latex. These results led to the finding that the polymer chains were constrained in the latex particles by factors of 2 to 4 from the relaxed coil dimensions. For M < 10{sup 6} g/mol SANS gave zero angle scattering intensities much higher than expected on the basis of a random distribution of labeled molecules. Several models were examined, including the possible development of core-shell structures at lower molecular weights.

  18. Motion of charged test particles in Reissner-Nordstroem spacetime

    SciTech Connect (OSTI)

    Pugliese, Daniela; Quevedo, Hernando; Ruffini, Remo

    2011-05-15

    We investigate the circular motion of charged test particles in the gravitational field of a charged mass described by the Reissner-Nordstroem spacetime. We study in detail all the spatial regions where circular motion is allowed around either black holes or naked singularities. The effects of repulsive gravity are discussed by finding all the circles at which a particle can have vanishing angular momentum. We show that the geometric structure of stable accretion disks, made of only test particles moving along circular orbits around the central body, allows us to clearly distinguish between black holes and naked singularities.

  19. Particle physics---Experimental

    SciTech Connect (OSTI)

    Lord, J.J.; Boynton, P.E.; Burnett, T.H.; Wilkes, R.J.

    1991-08-21

    We are continuing a research program in particle astrophysics and high energy experimental particle physics. We have joined the DUMAND Collaboration, which is constructing a deep undersea astrophysical neutrino detector near Hawaii. Studies of high energy hadronic interactions using emulsion chamber techniques were also continued, using balloon flight exposures to ultra-high cosmic ray nuclei (JACEE) and accelerator beams. As members of the DUMAND Collaboration, we have responsibility for development a construction of critical components for the deep undersea neutrino detector facility. We have designed and developed the acoustical positioning system required to permit reconstruction of muon tracks with sufficient precision to meet the astrophysical goals of the experiment. In addition, we are making significant contributions to the design of the database and triggering system to be used. Work has been continuing in other aspects of the study of multiparticle production processes in nuclei. We are participants in a joint US/Japan program to study nuclear interactions at energies two orders of magnitude greater than those of existing accelerators, using balloon-borne emulsion chambers. On one of the flights we found two nuclear interactions of multiplicity over 1000 -- one with a multiplicity of over 2000 and pseudorapidity density {approximately} 800 in the central region. At the statistical level of the JACEE experiment, the frequency of occurrence of such events is orders of magnitude too large. We have continued our ongoing program to study hadronic interactions in emulsions exposed to high energy accelerator beams.

  20. ORISE: Forensic scientist finds truth in fingerprints

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Forensic scientist finds truth in fingerprints For more than 30 years, Imogene Van Buren has searched for truth in the friction ridges of fingerprints. She has identified victims...

  1. Right rock: Finding/refining customer expectations

    SciTech Connect (OSTI)

    Ashby, R.

    1997-11-01

    This report contains viewgraphs on methods of finding customer expectations of software and then refining the documentation and software to fit these expectations.

  2. Nonlinear particle behavior during cross-type optical particle separation

    SciTech Connect (OSTI)

    Kim, Sang Bok; Lee, Kyung Heon; Sung, Hyung Jin; Kim, Sang Soo

    2009-12-28

    The effects of varying the ratio of the optical force to the viscous drag force, termed S, on cross-type optical particle separation were investigated experimentally to test previous theoretical predictions. The experiments were performed for various flow velocities, powers of the laser beam, and radii of the laser beam waist and the particles. The behaviors of the particles during optical separation were examined by measuring the retention distances and analyzing the particle trajectories. For small values of S, the particles move with constant velocity in the flow direction and the retention distance increases linearly with S. However, the particles accelerate and decelerate within the laser beam and the retention distance increases nonlinearly with S when S increases further.

  3. What is a Higgs Boson?

    SciTech Connect (OSTI)

    Lincoln, Don

    2011-07-07

    Fermilab scientist Don Lincoln describes the nature of the Higgs boson. Several large experimental groups are hot on the trail of this elusive subatomic particle which is thought to explain the origins of particle mass.

  4. What is a Higgs Boson?

    ScienceCinema (OSTI)

    Lincoln, Don

    2014-08-12

    Fermilab scientist Don Lincoln describes the nature of the Higgs boson. Several large experimental groups are hot on the trail of this elusive subatomic particle which is thought to explain the origins of particle mass.

  5. SLAC All Access: Vacuum Microwave Device Department

    ScienceCinema (OSTI)

    Haase, Andy

    2014-06-13

    The Vacuum Microwave Device Department (VMDD) builds the devices that make SLAC's particle accelerators go. These devices, called klystrons, generate intense waves of microwave energy that rocket subatomic particles up to nearly the speed of light.

  6. Fermilab | Science | Particle Physics | Benefits of Particle Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Benefits of Particle Physics photo Each generation of particle accelerators and detectors builds on the previous one, raising the potential for discovery and pushing the level of technology ever higher. In 1930, Ernest O. Lawrence, the father of particle accelerators, built the first hand-held cyclotron at Berkeley, California. Larger and more powerful accelerators soon followed. After a day's research, Lawrence often operated the Berkeley cyclotrons through the night to produce medical isotopes

  7. Cooled particle accelerator target

    DOE Patents [OSTI]

    Degtiarenko, Pavel V.

    2005-06-14

    A novel particle beam target comprising: a rotating target disc mounted on a retainer and thermally coupled to a first array of spaced-apart parallel plate fins that extend radially inwardly from the retainer and mesh without physical contact with a second array of spaced-apart parallel plate fins that extend radially outwardly from and are thermally coupled to a cooling mechanism capable of removing heat from said second array of spaced-apart fins and located within the first array of spaced-apart parallel fins. Radiant thermal exchange between the two arrays of parallel plate fins provides removal of heat from the rotating disc. A method of cooling the rotating target is also described.

  8. Particle beam injection system

    DOE Patents [OSTI]

    Jassby, Daniel L.; Kulsrud, Russell M.

    1977-01-01

    This invention provides a poloidal divertor for stacking counterstreaming ion beams to provide high intensity colliding beams. To this end, method and apparatus are provided that inject high energy, high velocity, ordered, atomic deuterium and tritium beams into a lower energy, toroidal, thermal equilibrium, neutral, target plasma column that is magnetically confined along an endless magnetic axis in a strong restoring force magnetic field having helical field lines to produce counterstreaming deuteron and triton beams that are received bent, stacked and transported along the endless axis, while a poloidal divertor removes thermal ions and electrons all along the axis to increase the density of the counterstreaming ion beams and the reaction products resulting therefrom. By balancing the stacking and removal, colliding, strong focused particle beams, reaction products and reactions are produced that convert one form of energy into another form of energy.

  9. Fermilab | Science | Particle Physics 101 | How Particle Physics Discovery

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Works How Particle Physics Discovery Works Matter at the smallest scale is made of elementary particles, pieces of matter that cannot be divided into anything smaller. As scientists over the past century have looked deeper and deeper into the atom, they have found the smallest things human beings have ever seen. How do they do it? The first step: accelerators The collision of particles at high energy, either with other particles or with a stationary target, allows physicists not only to look

  10. Parallel halo finding in N-body cosmology simulations

    SciTech Connect (OSTI)

    Pfitzner, D.W.; Salmon, J.K.

    1996-12-31

    Cosmological N-body simulations on parallel computers produce large datasets - about five hundred Megabytes at a single output time, or tens of Gigabytes over the course of a simulation. These large datasets require further analysis before they can be compared to astronomical observations. We have implemented two methods for performing halo finding, a key part of the knowledge discovery process, on parallel machines. One of these is a parallel implementation of the friends of friends (FOF) algorithm, widely used in the field of N-body cosmology. The new isodensity (ID) method has been developed to overcome some of the shortcomings of FOR Both have been implemented on a variety of computer systems, and successfully used to extract halos from simulations with up to 256{sup 3} (or about 16.8 million) particles, which axe among the largest N-body cosmology simulations in existence.

  11. Fermilab | Science | Particle Physics | Neutrinos

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Neutrinos photo Our universe is permeated with neutrinos - nearly massless, neutral particles that interact so rarely with other matter that trillions of them pass through our bodies each second without leaving a trace. These tiny particles, studied in world-leading Fermilab experiments, could be key to a deeper understanding of our universe. Neutrinos, first discovered in 1956, have some mysterious characteristics. They have puzzlingly low masses, compared to other elementary particles, and

  12. High field gradient particle accelerator

    DOE Patents [OSTI]

    Nation, J.A.; Greenwald, S.

    1989-05-30

    A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications is disclosed. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle. 10 figs.

  13. High field gradient particle accelerator

    DOE Patents [OSTI]

    Nation, John A.; Greenwald, Shlomo

    1989-01-01

    A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle.

  14. ARM - Measurement - Aerosol particle size

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SPLATT-II : Single Particle Laser Ablasion Time flown on Aircraft TDMA-AIR : Tandem Differential Mobility Analyzer- Airborne UW-CONVAIR580 : University of Washington...

  15. Continuous flow dielectrophoretic particle concentrator

    DOE Patents [OSTI]

    Cummings, Eric B.

    2007-04-17

    A continuous-flow filter/concentrator for separating and/or concentrating particles in a fluid is disclosed. The filter is a three-port device an inlet port, an filter port and a concentrate port. The filter separates particles into two streams by the ratio of their dielectrophoretic mobility to their electrokinetic, advective, or diffusive mobility if the dominant transport mechanism is electrokinesis, advection, or diffusion, respectively.Also disclosed is a device for separating and/or concentrating particles by dielectrophoretic trapping of the particles.

  16. The Particle Physics of You

    Office of Energy Efficiency and Renewable Energy (EERE)

    Not only are we made of fundamental particles, we also produce them and are constantly bombarded by them throughout the day.

  17. National Electric Transmission Congestion Study: Preliminary Findings

    Broader source: Energy.gov [DOE]

    The Department hosted three webinars in August 2012 to receive input and suggestions concerning the preliminary findings of the National Electric Transmission Congestion Study. The updated presentation used in the webinars is now available.

  18. Missourian Finds New Opportunity in Energy Industry

    Broader source: Energy.gov [DOE]

    How one Missouri man decided to take matters into his own hands - creating a company that improves energy efficiency in homes and buildings - after not being able to find work during the recession.

  19. NREL Publishes Gearbox Reliability Collaborative Findings Report |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Publishes Gearbox Reliability Collaborative Findings Report NREL Publishes Gearbox Reliability Collaborative Findings Report October 3, 2011 - 12:56pm Addthis This is an excerpt from the Third Quarter 2011 edition of the Wind Program R&D Newsletter. In June, DOE's National Renewable Energy Laboratory (NREL) published the first formal report on the efforts of the Gearbox Reliability Collaborative (GRC) to address a major challenge for the wind energy industry-gearbox

  20. Mars Rover finds changing rocks, surprising scientists

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mars Rover finds changing rocks, surprising scientists Mars Rover finds changing rocks, surprising scientists As NASA's Curiosity rover treks up a three-mile-high mountain on Mars, the rocks are changing. Back on Earth, scientists analyzing the data realized this was something different: It turned out to be the first of the high-silica rocks. December 24, 2015 Mars landscape This color-adjusted composite of images taken by NASA's Curiosity rover in September shows the lower portion of Mount

  1. Floodplain Assessment and Statement of Findings

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Statement of Findings for Installation of a Renewable Energy Anaerobic Digester Facility at the University of California, Davis in Yolo County, California January 28, 2013 1.0 Introduction This Floodplain Assessment and Statement of Findings has been prepared in accordance with 10 Code of Federal Regulations (CFR) 1022, "Compliance with Floodplain and Wetland Environmental Review Requirements" which were promulgated to implement the requirements of the U.S. Department of Energy's

  2. Floodplain Statement of Findings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Floodplain Statement of Findings Floodplain Statement of Findings Loan Guarantee to AES Energy Storage, LLC Project Dyno Electric Grid Stability Advanced Battery Systems Project Dyno would provide ancillary services within the New York power market. The Project is composed of advanced lithium ion battery cells and power control technologies to store power to help maintain the stability of the electric power grid. The Project would be composed of ten fifty-three foot metal containers each housing

  3. Distributed PV Interconnection Recent Analysis Findings

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Recent Analysis Findings Page 1 of 18 Kristen Ardani, Miriam Makhyoun Page 1 of 18 [Speaker: Kristen Ardani] Cover Slide: Good afternoon, everyone. Thank you for joining the Distributed Generation Interconnection Collaborative informational webinar. Today, we are kicking off 2015 with a joint presentation from SEPA and NREL, in which each will discuss recent research and analysis findings related to interconnection. Slide 2: So really, the purpose of today's meeting is to hear recent research

  4. Distributed PV Interconnection: Recent Analysis Findings

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    January 21, 2015 "NREL and SEPA Recent Analysis Findings" Miriam Makhyoun, Solar Electric Power Association (SEPA) Kristen Ardani, National Renewable Energy Laboratory (NREL) 2 Purpose of Today's Meeting * Hear results from SEPA's recent survey of utility interconnection practices. o SEPA finds that utilities confront common challenges as they move towards more streamlined interconnection application processing. * Hear NREL results of forthcoming DGIC data collection and analysis,

  5. Jefferson Laboratory Findings Excite Theoreticians, Experimentatlists |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Laboratory Findings Excite Theoreticians, Experimentatlists Jefferson Laboratory Findings Excite Theoreticians, Experimentatlists March 1999 Seemingly reasonable assumptions define the human view of the world. But ruled of thumb can mislead - or be altogether incorrect. Fortunately, in physics, most assumptions can be tested. Those that don't measure up are amended. An experiment at the Department of Energy's Thomas Jefferson National Accelerator Facility (Jefferson Lab) has

  6. TE Connectivity Finds Answers in Tomography

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    TE Connectivity Finds Answers in Tomography TE Connectivity Finds Answers in Tomography Print Thursday, 22 August 2013 10:50 TE Connectivity is a world leader in connectivity-the $13 billion global company designs and manufactures more than 500,000 different electronic connectivity products for the automotive, energy, industrial, broadband communications, consumer device, healthcare, aerospace, and defense industries. TE Connectivity has a long-standing commitment to innovation and engineering

  7. TE Connectivity Finds Answers in Tomography

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    TE Connectivity Finds Answers in Tomography TE Connectivity Finds Answers in Tomography Print Thursday, 22 August 2013 10:50 TE Connectivity is a world leader in connectivity-the $13 billion global company designs and manufactures more than 500,000 different electronic connectivity products for the automotive, energy, industrial, broadband communications, consumer device, healthcare, aerospace, and defense industries. TE Connectivity has a long-standing commitment to innovation and engineering

  8. Particle deposition in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.

    2002-09-01

    Exposure to airborne particles is detrimental to human health and indoor exposures dominate total exposures for most people. The accidental or intentional release of aerosolized chemical and biological agents within or near a building can lead to exposures of building occupants to hazardous agents and costly building remediation. Particle deposition in heating, ventilation and air-conditioning (HVAC) systems may significantly influence exposures to particles indoors, diminish HVAC performance and lead to secondary pollutant release within buildings. This dissertation advances the understanding of particle behavior in HVAC systems and the fates of indoor particles by means of experiments and modeling. Laboratory experiments were conducted to quantify particle deposition rates in horizontal ventilation ducts using real HVAC materials. Particle deposition experiments were conducted in steel and internally insulated ducts at air speeds typically found in ventilation ducts, 2-9 m/s. Behaviors of monodisperse particles with diameters in the size range 1-16 {micro}m were investigated. Deposition rates were measured in straight ducts with a fully developed turbulent flow profile, straight ducts with a developing turbulent flow profile, in duct bends and at S-connector pieces located at duct junctions. In straight ducts with fully developed turbulence, experiments showed deposition rates to be highest at duct floors, intermediate at duct walls, and lowest at duct ceilings. Deposition rates to a given surface increased with an increase in particle size or air speed. Deposition was much higher in internally insulated ducts than in uninsulated steel ducts. In most cases, deposition in straight ducts with developing turbulence, in duct bends and at S-connectors at duct junctions was higher than in straight ducts with fully developed turbulence. Measured deposition rates were generally higher than predicted by published models. A model incorporating empirical equations based on

  9. Effect of Surface Modification and Macrophage Phenotype on Particle Internalization

    SciTech Connect (OSTI)

    Wang, Daniel; Phan, Ngoc; Isely, Christopher; Bruene, Lucas; Bratlie, Kaitlin M

    2014-11-10

    Material properties play a key role in the cellular internalization of polymeric particles. In the present study, we have investigated the effects of material characteristics such as water contact angle, zeta potential, melting temperature, and alternative activation of complement on particle internalization for pro-inflammatory, pro-angiogenic, and naïve macrophages by using biopolymers (?600 nm), functionalized with 13 different molecules. Understanding how material parameters influence particle internalization for different macrophage phenotypes is important for targeted delivery to specific cell populations. Here, we demonstrate that material parameters affect the alternative pathway of complement activation as well as particle internalization for different macrophage phenotypes. Here, we show that the quantitative structure–activity relationship method (QSAR) previously used to predict physiochemical properties of materials can be applied to targeting different macrophage phenotypes. These findings demonstrated that targeted drug delivery to macrophages could be achieved by exploiting material parameters.

  10. High spatial resolution particle detectors

    DOE Patents [OSTI]

    Boatner, Lynn A.; Mihalczo, John T.

    2012-09-04

    Disclosed below are representative embodiments of methods, apparatus, and systems for detecting particles, such as radiation or charged particles. One exemplary embodiment disclosed herein is particle detector comprising an optical fiber with a first end and second end opposite the first end. The optical fiber of this embodiment further comprises a doped region at the first end and a non-doped region adjacent to the doped region. The doped region of the optical fiber is configured to scintillate upon interaction with a target particle, thereby generating one or more photons that propagate through the optical fiber and to the second end. Embodiments of the disclosed technology can be used in a variety of applications, including associated particle imaging and cold neutron scattering.

  11. High spatial resolution particle detectors

    SciTech Connect (OSTI)

    Boatner, Lynn A.; Mihalczo, John T.

    2015-10-13

    Disclosed below are representative embodiments of methods, apparatus, and systems for detecting particles, such as radiation or charged particles. One exemplary embodiment disclosed herein is particle detector comprising an optical fiber with a first end and second end opposite the first end. The optical fiber of this embodiment further comprises a doped region at the first end and a non-doped region adjacent to the doped region. The doped region of the optical fiber is configured to scintillate upon interaction with a target particle, thereby generating one or more photons that propagate through the optical fiber and to the second end. Embodiments of the disclosed technology can be used in a variety of applications, including associated particle imaging and cold neutron scattering.

  12. Particle sizer and DNA sequencer

    DOE Patents [OSTI]

    Olivares, Jose A.; Stark, Peter C.

    2005-09-13

    An electrophoretic device separates and detects particles such as DNA fragments, proteins, and the like. The device has a capillary which is coated with a coating with a low refractive index such as Teflon.RTM. AF. A sample of particles is fluorescently labeled and injected into the capillary. The capillary is filled with an electrolyte buffer solution. An electrical field is applied across the capillary causing the particles to migrate from a first end of the capillary to a second end of the capillary. A detector light beam is then scanned along the length of the capillary to detect the location of the separated particles. The device is amenable to a high throughput system by providing additional capillaries. The device can also be used to determine the actual size of the particles and for DNA sequencing.

  13. Focusing particle concentrator with application to ultrafine particles

    DOE Patents [OSTI]

    Hering, Susanne; Lewis, Gregory; Spielman, Steven R.

    2013-06-11

    Technology is presented for the high efficiency concentration of fine and ultrafine airborne particles into a small fraction of the sampled airflow by condensational enlargement, aerodynamic focusing and flow separation. A nozzle concentrator structure including an acceleration nozzle with a flow extraction structure may be coupled to a containment vessel. The containment vessel may include a water condensation growth tube to facilitate the concentration of ultrafine particles. The containment vessel may further include a separate carrier flow introduced at the center of the sampled flow, upstream of the acceleration nozzle of the nozzle concentrator to facilitate the separation of particle and vapor constituents.

  14. Electrostatic wire stabilizing a charged particle beam

    DOE Patents [OSTI]

    Prono, D.S.; Caporaso, G.J.; Briggs, R.J.

    1983-03-21

    In combination with a charged particle beam generator and accelerator, apparatus and method are provided for stabilizing a beam of electrically charged particles. A guiding means, disposed within the particle beam, has an electric charge induced upon it by the charged particle beam. Because the sign of the electric charge on the guiding means and the sign of the particle beam are opposite, the particles are attracted toward and cluster around the guiding means to thereby stabilize the particle beam as it travels.

  15. Finding a Career in Energy Efficiency

    Broader source: Energy.gov [DOE]

    Kendra went to a county agency hoping they could help her find work, but what she really wanted was a career. That’s when she was referred to an upcoming weatherization training program hosted by the Laborers’ International Union of North America, a half-million strong labor union for construction workers, including weatherization workers.

  16. An interesting finding in sup 229 Th

    SciTech Connect (OSTI)

    Reich, C.W.

    1990-01-01

    Work at INEL has recently established that the first excited states of {sup 229}Th forms a closely spaced doublet with the ground state, the separation being 1 {plus minus} 4 electron volts. A discussion of the data and the reasoning supporting this unprecedented finding is given. Some potential applications are briefly mentioned. 27 refs., 3 figs., 2 tabs.

  17. Fermilab | Science | Particle Physics 101 | Worldwide Particle Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Discoveries Worldwide Particle Physics Discoveries Photo: PPD The current theoretical framework that describes elementary particles and their forces, known as the Standard Model, is based on experiments that started in 1897 with the discovery of the electron. Today, we know that there are six leptons, six quarks, four force carriers and the Higgs boson. The list below gives the dates of important discoveries, the names of scientists and laboratories involved, and Nobel Prizes awarded for the

  18. Hydrodynamic enhanced dielectrophoretic particle trapping

    DOE Patents [OSTI]

    Miles, Robin R.

    2003-12-09

    Hydrodynamic enhanced dielectrophoretic particle trapping carried out by introducing a side stream into the main stream to squeeze the fluid containing particles close to the electrodes producing the dielelectrophoretic forces. The region of most effective or the strongest forces in the manipulating fields of the electrodes producing the dielectrophoretic forces is close to the electrodes, within 100 .mu.m from the electrodes. The particle trapping arrangement uses a series of electrodes with an AC field placed between pairs of electrodes, which causes trapping of particles along the edges of the electrodes. By forcing an incoming flow stream containing cells and DNA, for example, close to the electrodes using another flow stream improves the efficiency of the DNA trapping.

  19. Particle detection systems and methods

    DOE Patents [OSTI]

    Morris, Christopher L.; Makela, Mark F.

    2010-05-11

    Techniques, apparatus and systems for detecting particles such as muons and neutrons. In one implementation, a particle detection system employs a plurality of drift cells, which can be for example sealed gas-filled drift tubes, arranged on sides of a volume to be scanned to track incoming and outgoing charged particles, such as cosmic ray-produced muons. The drift cells can include a neutron sensitive medium to enable concurrent counting of neutrons. The system can selectively detect devices or materials, such as iron, lead, gold, uranium, plutonium, and/or tungsten, occupying the volume from multiple scattering of the charged particles passing through the volume and can concurrently detect any unshielded neutron sources occupying the volume from neutrons emitted therefrom. If necessary, the drift cells can be used to also detect gamma rays. The system can be employed to inspect occupied vehicles at border crossings for nuclear threat objects.

  20. Lab supercomputer finds new home at UNM

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab supercomputer to UNM Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: September 1, 2016 all issues All Issues » submit Lab supercomputer finds new home at UNM Chance of a lifetime for students with complex research projects March 1, 2015 UNM logo. UNM logo. Contact Community Programs Director Kurt Steinhaus Email Editor Ute Haker Email The New Mexico Consortium has donated Los Alamos National Laboratory's Ulam supercomputer to the

  1. ARM - Measurement - Particle number concentration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    number concentration ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Particle number concentration The number of particles present in any given volume of air. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those

  2. ARM - Measurement - Particle size distribution

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    size distribution ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Particle size distribution The number of particles present in any given volume of air within a specified size range. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available

  3. Long range alpha particle detector

    DOE Patents [OSTI]

    MacArthur, D.W.; Wolf, M.A.; McAtee, J.L.; Unruh, W.P.; Cucchiara, A.L.; Huchton, R.L.

    1993-02-02

    An alpha particle detector capable of detecting alpha radiation from distant sources. In one embodiment, a high voltage is generated in a first electrically conductive mesh while a fan draws air containing air molecules ionized by alpha particles through an air passage and across a second electrically conductive mesh. The current in the second electrically conductive mesh can be detected and used for measurement or alarm. The detector can be used for area, personnel and equipment monitoring.

  4. Long range alpha particle detector

    DOE Patents [OSTI]

    MacArthur, Duncan W.; Wolf, Michael A.; McAtee, James L.; Unruh, Wesley P.; Cucchiara, Alfred L.; Huchton, Roger L.

    1993-01-01

    An alpha particle detector capable of detecting alpha radiation from distant sources. In one embodiment, a high voltage is generated in a first electrically conductive mesh while a fan draws air containing air molecules ionized by alpha particles through an air passage and across a second electrically conductive mesh. The current in the second electrically conductive mesh can be detected and used for measurement or alarm. The detector can be used for area, personnel and equipment monitoring.

  5. Hybrid particles and associated methods

    DOE Patents [OSTI]

    Fox, Robert V; Rodriguez, Rene; Pak, Joshua J; Sun, Chivin

    2015-02-10

    Hybrid particles that comprise a coating surrounding a chalcopyrite material, the coating comprising a metal, a semiconductive material, or a polymer; a core comprising a chalcopyrite material and a shell comprising a functionalized chalcopyrite material, the shell enveloping the core; or a reaction product of a chalcopyrite material and at least one of a reagent, heat, and radiation. Methods of forming the hybrid particles are also disclosed.

  6. Measuring momentum for charged particle tomography

    DOE Patents [OSTI]

    Morris, Christopher; Fraser, Andrew Mcleod; Schultz, Larry Joe; Borozdin, Konstantin N.; Klimenko, Alexei Vasilievich; Sossong, Michael James; Blanpied, Gary

    2010-11-23

    Methods, apparatus and systems for detecting charged particles and obtaining tomography of a volume by measuring charged particles including measuring the momentum of a charged particle passing through a charged particle detector. Sets of position sensitive detectors measure scattering of the charged particle. The position sensitive detectors having sufficient mass to cause the charged particle passing through the position sensitive detectors to scatter in the position sensitive detectors. A controller can be adapted and arranged to receive scattering measurements of the charged particle from the charged particle detector, determine at least one trajectory of the charged particle from the measured scattering; and determine at least one momentum measurement of the charged particle from the at least one trajectory. The charged particle can be a cosmic ray-produced charged particle, such as a cosmic ray-produced muon. The position sensitive detectors can be drift cells, such as gas-filled drift tubes.

  7. Self-assembly of submicron particles between electrodes

    SciTech Connect (OSTI)

    Gu, Z.-Z.; Meng, Q.-B.; Hayami, S.; Fujishima, A.; Sato, O.

    2001-08-15

    A method for the fabrication of opal films between parallel transparent electrodes is described. Monodispersed particles are assembled by taking advantage of the rheological force induced by the evaporation of a solvent in a thin capillary cell. Three-dimensional opal films with controllable thickness could be fabricated, in which a regular hexagonal arrangement of particles parallel to the substrates over a large area was observed. Such a sandwich-like photonic device may find applications in fabricating electrically tunable photonic crystals. {copyright} 2001 American Institute of Physics.

  8. Transverse-structure electrostatic charged particle beam lens

    DOE Patents [OSTI]

    Moran, M.J.

    1998-10-13

    Electrostatic particle-beam lenses using a concentric co-planar array of independently biased rings can be advantageous for some applications. Traditional electrostatic lenses often consist of axial series of biased rings, apertures, or tubes. The science of lens design has devoted much attention to finding axial arrangements that compensate for the substantial optical aberrations of the individual elements. Thus, as with multi-element lenses for light, a multi-element charged-particle lens can have optical behavior that is far superior to that of the individual elements. Transverse multiple-concentric-ring lenses achieve high performance, while also having advantages in terms of compactness and optical versatility. 7 figs.

  9. Transverse-structure electrostatic charged particle beam lens

    DOE Patents [OSTI]

    Moran, Michael J.

    1998-01-01

    Electrostatic particle-beam lenses using a concentric co-planar array of independently biased rings can be advantageous for some applications. Traditional electrostatic lenses often consist of axial series of biased rings, apertures, or tubes. The science of lens design has devoted much attention to finding axial arrangements that compensate for the substantial optical aberrations of the individual elements. Thus, as with multi-element lenses for light, a multi-element charged-particle lens can have optical behavior that is far superior to that of the individual elements. Transverse multiple-concentric-ring lenses achieve high performance, while also having advantages in terms of compactness and optical versatility.

  10. Particle analysis in an acoustic cytometer

    DOE Patents [OSTI]

    Kaduchak, Gregory; Ward, Michael D

    2012-09-18

    The present invention is a method and apparatus for acoustically manipulating one or more particles. Acoustically manipulated particles may be separated by size. The particles may be flowed in a flow stream and acoustic radiation pressure, which may be radial, may be applied to the flow stream. This application of acoustic radiation pressure may separate the particles. In one embodiment, the particles may be separated by size, and as a further example, the larger particles may be transported to a central axis.

  11. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion...

  12. Microfluidic ultrasonic particle separators with engineered node...

    Office of Scientific and Technical Information (OSTI)

    particle separators with engineered node locations and geometries Citation Details In-Document Search Title: Microfluidic ultrasonic particle separators with engineered node ...

  13. Ultrafine Condensation Particle Counter Instrument Handbook ...

    Office of Scientific and Technical Information (OSTI)

    Ultrafine Condensation Particle Counter Instrument Handbook Citation Details In-Document Search Title: Ultrafine Condensation Particle Counter Instrument Handbook The Model 3776 ...

  14. Condensation Particle Counter Instrument Handbook (Technical...

    Office of Scientific and Technical Information (OSTI)

    Condensation Particle Counter Instrument Handbook Citation Details In-Document Search Title: Condensation Particle Counter Instrument Handbook The Model 3772 CPC is a compact, ...

  15. Gasoline Vehicle Exhuast Particle Sampling Study | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Particle Measurement Methodology: Comparison of On-road and Lab Diesel Particle Size Distributions Evaluation of the European PMP Methodologies Using Chassis Dynamometer and ...

  16. Berkeley Lab Particle Accelerator Sets World Record

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Traditional particle accelerators, like the Large Hadron Collider at CERN, which is 17 miles ... Particle Accelerators NERSC Resources Used: Edison, Hopper DOE Program ...

  17. Nuclear and Particle Physics, Astrophysics, and Cosmology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nuclear and Particle Physics, Astrophysics, and Cosmology Providing scientific and technical leadership in fundamental and applied theoretical research on nuclear, particle, ...

  18. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused particle growth while...

  19. Research in Elementary Particle Physics (Technical Report) |...

    Office of Scientific and Technical Information (OSTI)

    Research in Elementary Particle Physics Citation Details In-Document Search Title: Research in Elementary Particle Physics This report details the accomplishments and research ...

  20. Technology Advancements for Next Generation Falling Particle...

    Office of Scientific and Technical Information (OSTI)

    Technology Advancements for Next Generation Falling Particle Receivers. Citation Details In-Document Search Title: Technology Advancements for Next Generation Falling Particle ...

  1. Best Possible Strategy for Finding Ground States

    SciTech Connect (OSTI)

    Franz, Astrid; Hoffmann, Karl Heinz; Salamon, Peter

    2001-06-04

    Finding the ground state of a system with a complex energy landscape is important for many physical problems including protein folding, spin glasses, chemical clusters, and neural networks. Such problems are usually solved by heuristic search methods whose efficacy is judged by empirical performance on selected examples. We present a proof that, within the large class of algorithms that simulate a random walk on the landscape, threshold accepting is the best possible strategy. In particular, it can perform better than simulated annealing and Tsallis statistics. Our proof is the first example of a provably optimal strategy in this area.

  2. Focus Series: Program Finds Community "Readiness" Is the Key...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Program Finds Community "Readiness" Is the Key to More Retrofits Focus Series: Program Finds Community "Readiness" Is the Key to More Retrofits Focus Series: Program Finds ...

  3. ARM: Tandem Differential Mobility Analyzer Aerosol Particle Sizer...

    Office of Scientific and Technical Information (OSTI)

    Subject: 54 Environmental Sciences Aerosol concentration; Aerosol particle size distribution; Hygroscopic growth; Particle number concentration; Particle size distribution Dataset ...

  4. Particle injector for fluid systems

    DOE Patents [OSTI]

    Ruch, Jeffrey F.

    1997-01-01

    A particle injector device provides injection of particles into a liquid eam. The device includes a funnel portion comprising a conical member having side walls tapering from a top opening (which receives the particles) down to a relatively smaller exit opening. A funnel inlet receives a portion of the liquid stream and the latter is directed onto the side walls of the conical member so as to create a cushion of liquid against which the particles impact. A main section of the device includes an inlet port in communication with the exit opening of the funnel portion. A main liquid inlet receives the main portion of the liquid stream at high pressure and low velocity and a throat region located downstream of the main liquid inlet accelerates liquid received by this inlet from the low velocity to a higher velocity so as to create a low pressure area at the exit opening of the funnel portion. An outlet opening of the main section enables the particles and liquid stream to exit from the injector device.

  5. Health Benefits of Particle Filtration

    SciTech Connect (OSTI)

    Fisk, William J.

    2013-10-01

    The evidence of health benefits of particle filtration in homes and commercial buildings is reviewed. Prior reviews of papers published before 2000 are summarized. The results of 16 more recent intervention studies are compiled and analyzed. Also, reviewed are four studies that modeled health benefits of using filtration to reduce indoor exposures to particles from outdoors. Prior reviews generally concluded that particle filtration is, at best, a source of small improvements in allergy and asthma health effects; however, many early studies had weak designs. A majority of recent intervention studies employed strong designs and more of these studies report statistically significant improvements in health symptoms or objective health outcomes, particularly for subjects with allergies or asthma. The percent age improvement in health outcomes is typically modest, for example, 7percent to 25percent. Delivery of filtered air to the breathing zone of sleeping allergic or asthmatic persons may be more consistently effective in improving health than room air filtration. Notable are two studies that report statistically significant improvements, with filtration, in markers that predict future adverse coronary events. From modeling, the largest potential benefits of indoor particle filtration may be reductions in morbidity and mortality from reducing indoor exposures to particles from outdoor air.

  6. Engineered plant biomass feedstock particles

    DOE Patents [OSTI]

    Dooley, James H.; Lanning, David N.; Broderick, Thomas F.

    2011-10-18

    A novel class of flowable biomass feedstock particles with unusually large surface areas that can be manufactured in remarkably uniform sizes using low-energy comminution techniques. The feedstock particles are roughly parallelepiped in shape and characterized by a length dimension (L) aligned substantially with the grain direction and defining a substantially uniform distance along the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L. The particles exhibit a disrupted grain structure with prominent end and surface checks that greatly enhances their skeletal surface area as compared to their envelope surface area. The L.times.H dimensions define a pair of substantially parallel side surfaces characterized by substantially intact longitudinally arrayed fibers. The W.times.H dimensions define a pair of substantially parallel end surfaces characterized by crosscut fibers and end checking between fibers. The L.times.W dimensions define a pair of substantially parallel top surfaces characterized by some surface checking between longitudinally arrayed fibers. At least 80% of the particles pass through a 1/4 inch screen having a 6.3 mm nominal sieve opening but are retained by a No. 10 screen having a 2 mm nominal sieve opening. The feedstock particles are manufactured from a variety of plant biomass materials including wood, crop residues, plantation grasses, hemp, bagasse, and bamboo.

  7. Confinement of test particles in warped spacetimes

    SciTech Connect (OSTI)

    Ghosh, Suman; Kar, Sayan; Nandan, Hemwati

    2010-07-15

    We investigate test particle trajectories in warped spacetimes with a thick brane warp factor, a cosmological on-brane line element, and a time dependent extra dimension. The geodesic equations are reduced to a first order autonomous dynamical system. Using analytical methods, we arrive at some useful general conclusions regarding possible trajectories. Oscillatory motion, suggesting confinement about the location of the thick brane, arises for a growing warp factor. On the other hand, we find runaway trajectories (exponential-like) for a decaying warp factor. Variations of the extra dimensional scale factor yield certain quantitative differences. Results obtained from explicit numerical evaluations match well with the qualitative conclusions obtained from the dynamical systems analysis.

  8. UDAC 2014 Findings and Recommendations | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2014 Findings and Recommendations UDAC 2014 Findings and Recommendations UDAC 2014 Findings and Recommendations (162.67 KB) More Documents & Publications Minutes from December 16, 2013 UDAC Meeting UDAC 2014 Report UDAC Findings and Recommendations 2014

  9. UDAC Findings and Recommendations 2014 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Findings and Recommendations 2014 UDAC Findings and Recommendations 2014 UDAC Findings and Recommendations 2014 (228.2 KB) More Documents & Publications Minutes from December 16, 2013 UDAC Meeting UDAC 2014 Report UDAC 2014 Findings and Recommendations

  10. Naked singularities as particle accelerators

    SciTech Connect (OSTI)

    Patil, Mandar; Joshi, Pankaj S.

    2010-11-15

    We investigate here the particle acceleration by naked singularities to arbitrarily high center of mass energies. Recently it has been suggested that black holes could be used as particle accelerators to probe the Planck scale physics. We show that the naked singularities serve the same purpose and probably would do better than their black hole counterparts. We focus on the scenario of a self-similar gravitational collapse starting from a regular initial data, leading to the formation of a globally naked singularity. It is seen that when particles moving along timelike geodesics interact and collide near the Cauchy horizon, the energy of collision in the center of mass frame will be arbitrarily high, thus offering a window to Planck scale physics.

  11. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    HOPE Release 3 Pitch Angle Sneak Peak Larsen, Brian Arthur ; Skoug, Ruth M. This report describes how the HOPE instrument is used to measure subatomic particles in the Van Allen ...

  12. Landfill aeration worldwide: Concepts, indications and findings

    SciTech Connect (OSTI)

    Ritzkowski, M.; Stegmann, R.

    2012-07-15

    Highlights: Black-Right-Pointing-Pointer Different landfill aeration concepts and accordant application areas are described. Black-Right-Pointing-Pointer Examples of full scale projects are provided for Europe, North-America and Asia. Black-Right-Pointing-Pointer Major project findings are summarised, including prospects and limitations. Black-Right-Pointing-Pointer Inconsistencies between laboratory and full scale results have been elaborated. Black-Right-Pointing-Pointer An explanatory approach in connection with the inconsistencies is provided. - Abstract: The creation of sustainable landfills is a fundamental goal in waste management worldwide. In this connection landfill aeration contributes towards an accelerated, controlled and sustainable conversion of conventional anaerobic landfills into a biological stabilized state associated with a minimised emission potential. The technology has been successfully applied to landfills in Europe, North America and Asia, following different strategies depending on the geographical region, the specific legislation and the available financial resources. Furthermore, methodologies for the incorporation of landfill aeration into the carbon trade mechanisms have been developed in recent years. This manuscript gives an overview on existing concepts for landfill aeration; their application ranges and specifications. For all of the described concepts examples from different countries worldwide are provided, including details regarding their potentials and limitations. Some of the most important findings from these aeration projects are summarised and future research needs have been identified. It becomes apparent that there is a great demand for a systematisation of the available results and implications in order to further develop and optimise this very promising technology. The IWWG (International Waste Working Group) Task Group 'Landfill Aeration' contributes towards the achievement of this goal.

  13. AEROSOL PARTICLE COLLECTOR DESIGN STUDY

    SciTech Connect (OSTI)

    Lee, S; Richard Dimenna, R

    2007-09-27

    A computational evaluation of a particle collector design was performed to evaluate the behavior of aerosol particles in a fast flowing gas stream. The objective of the work was to improve the collection efficiency of the device while maintaining a minimum specified air throughput, nominal collector size, and minimal power requirements. The impact of a range of parameters was considered subject to constraints on gas flow rate, overall collector dimensions, and power limitations. Potential improvements were identified, some of which have already been implemented. Other more complex changes were identified and are described here for further consideration. In addition, fruitful areas for further study are proposed.

  14. Elementary Particles and Weak Interactions

    DOE R&D Accomplishments [OSTI]

    Lee, T. D.; Yang, C. N.

    1957-01-01

    Some general patterns of interactions between various elementary particles are reviewed and some general questions concerning the symmetry properties of these particles are studied. Topics are included on the theta-tau puzzle, experimental limits on the validity of parity conservation, some general discussions on the consequences due to possible non-invariance under P, C, and T, various possible experimental tests on invariance under P, C, and T, a two-component theory of the neutrino, a possible law of conservation of leptons and the universal Fermi interactions, and time reversal invariance and Mach's principle. (M.H.R.)

  15. Charged particle mobility refrigerant analyzer

    DOE Patents [OSTI]

    Allman, S.L.; Chunghsuan Chen; Chen, F.C.

    1993-02-02

    A method for analyzing a gaseous electronegative species comprises the steps of providing an analysis chamber; providing an electric field of known potential within the analysis chamber; admitting into the analysis chamber a gaseous sample containing the gaseous electronegative species; providing a pulse of free electrons within the electric field so that the pulse of free electrons interacts with the gaseous electronegative species so that a swarm of electrically charged particles is produced within the electric field; and, measuring the mobility of the electrically charged particles within the electric field.

  16. Frontiers of particle beam physics

    SciTech Connect (OSTI)

    Sessler, A.M.

    1989-11-01

    First, a review is given of various highly-developed techniques for particle handling which are, nevertheless, being vigorously advanced at the present time. These include soft superconductor radio frequency cavities, hard superconductor magnets, cooling rings for ions and anti-protons, and damping rings for electrons. Second, attention is focused upon novel devices for particle generation, acceleration, and focusing. These include relativistic klystrons and free electron laser power sources, binary power multipliers, photocathodes, switched-power linacs, plasma beat-wave accelerators, plasma wake-field accelerators, plasma lenses, plasma adiabatic focusers and plasma compensators. 12 refs.

  17. The Fermilab Particle Astrophysics Center

    SciTech Connect (OSTI)

    Not Available

    2004-11-01

    The Particle Astrophysics Center was established in fall of 2004. Fermilab director Michael S. Witherell has named Fermilab cosmologist Edward ''Rocky'' Kolb as its first director. The Center will function as an intellectual focus for particle astrophysics at Fermilab, bringing together the Theoretical and Experimental Astrophysics Groups. It also encompasses existing astrophysics projects, including the Sloan Digital Sky Survey, the Cryogenic Dark Matter Search, and the Pierre Auger Cosmic Ray Observatory, as well as proposed projects, including the SuperNova Acceleration Probe to study dark energy as part of the Joint Dark Energy Mission, and the ground-based Dark Energy Survey aimed at measuring the dark energy equation of state.

  18. Method of identifying defective particle coatings

    DOE Patents [OSTI]

    Cohen, Mark E.; Whiting, Carlton D.

    1986-01-01

    A method for identifying coated particles having defective coatings desig to retain therewithin a build-up of gaseous materials including: (a) Pulling a vacuum on the particles; (b) Backfilling the particles at atmospheric pressure with a liquid capable of wetting the exterior surface of the coated particles, said liquid being a compound which includes an element having an atomic number higher than the highest atomic number of any element in the composition which forms the exterior surface of the particle coating; (c) Drying the particles; and (d) Radiographing the particles. By television monitoring, examination of the radiographs is substantially enhanced.

  19. Gantry for medical particle therapy facility

    DOE Patents [OSTI]

    Trbojevic, Dejan

    2012-05-08

    A particle therapy gantry for delivering a particle beam to a patient includes a beam tube having a curvature defining a particle beam path and a plurality of fixed field magnets sequentially arranged along the beam tube for guiding the particle beam along the particle path. In a method for delivering a particle beam to a patient through a gantry, a particle beam is guided by a plurality of fixed field magnets sequentially arranged along a beam tube of the gantry and the beam is alternately focused and defocused with alternately arranged focusing and defocusing fixed field magnets.

  20. Gantry for medical particle therapy facility

    DOE Patents [OSTI]

    Trbojevic, Dejan

    2013-04-23

    A particle therapy gantry for delivering a particle beam to a patient includes a beam tube having a curvature defining a particle beam path and a plurality of superconducting, variable field magnets sequentially arranged along the beam tube for guiding the particle beam along the particle path. In a method for delivering a particle beam to a patient through a gantry, a particle beam is guided by a plurality of variable field magnets sequentially arranged along a beam tube of the gantry and the beam is alternately focused and defocused with alternately arranged focusing and defocusing variable field magnets.

  1. Big Bang Day : The Great Big Particle Adventure - 1. Atom

    ScienceCinema (OSTI)

    None

    2011-04-25

    In this series, comedian and physicist Ben Miller asks the CERN scientists what they hope to find. The notion of atoms dates back to Greek philosophers who sought a natural mechanical explanation of the Universe, as opposed to a divine one. The existence what we call chemical atoms, the constituents of all we see around us, wasn't proved until a hundred years ago, but almost simultaneously it was realised these weren't the indivisible constituents the Greeks envisaged. Much of the story of physics since then has been the ever-deeper probing of matter until, at the end of the 20th century, a complete list of fundamental ingredients had been identified, apart from one, the much discussed Higgs particle. In this programme, Ben finds out why this last particle is so pivotal, not just to atomic theory, but to our very existence - and how hopeful the scientists are of proving its existence.

  2. LARGE PARTICLES IN ACTIVE ASTEROID P/2010 A2

    SciTech Connect (OSTI)

    Jewitt, David; Ishiguro, Masateru; Agarwal, Jessica

    2013-02-10

    The previously unknown asteroid P/2010 A2 rose to prominence in 2010 by forming a transient, comet-like tail consisting of ejected dust. The observed dust production was interpreted as the result of either a hypervelocity impact with a smaller body or a rotational disruption. We have re-observed this object, finding that large particles remain a full orbital period after the initial outburst. In the intervening years, particles smaller than {approx}3 mm in radius have been dispersed by radiation pressure, leaving only larger particles in the trail. Since the total mass is dominated by the largest particles, the radiation pressure filtering allows us to obtain a more reliable estimate of the debris mass than was previously possible. We find that the mass contained in the debris is {approx}5 Multiplication-Sign 10{sup 8} kg (assumed density 3000 kg m{sup -3}), the ratio of the total debris mass to the nucleus mass is {approx}0.1, and that events like P/2010 A2 contribute <3% to the Zodiacal dust production rate. Physical properties of the nucleus and debris are also determined.

  3. Ethanol assisted reduction and nucleation of ferromagnetic Co and Ni nanocrystalline particles

    SciTech Connect (OSTI)

    Huba, ZJ; Carpenter, EE

    2013-01-01

    In this report, we demonstrate the ability of ethanol to act as a solvent and reducing agent to nucleate nanocrystalline Co and Ni particles. Under solvothermal conditions, Co and Ni particles can be produced at 200 degrees C. The Ni and Co particles crystallized into FCC and a mixture of FCC and HCP crystal phases, respectively. Ni particles possessed a spherical morphology with diameters in the range of 200 nm to 300 nm. Co particles took on an ellipsoidal morphology, with diameters greater than 500 nm. Magnetizations for the Ni and Co particles were commensurate with bulk values, showing their high crystallinity and the presence of little oxide impurity. By finding inexpensive solvents with a lowered environmental impact, steps towards a "greener" synthetic process for ferromagnetic nanoparticles can be established.

  4. Ignition of Aluminum Particles and Clouds

    SciTech Connect (OSTI)

    Kuhl, A L; Boiko, V M

    2010-04-07

    Here we review experimental data and models of the ignition of aluminum (Al) particles and clouds in explosion fields. The review considers: (i) ignition temperatures measured for single Al particles in torch experiments; (ii) thermal explosion models of the ignition of single Al particles; and (iii) the unsteady ignition Al particles clouds in reflected shock environments. These are used to develop an empirical ignition model appropriate for numerical simulations of Al particle combustion in shock dispersed fuel explosions.

  5. Fermilab | Science | Particle Physics | Research & Development

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research & Development VLPC wafer for DZero future detector To investigate the smallest bits of matter, some of which last only a fraction of a second before decaying, scientists need something more powerful than a microscope. To study particles, physicists use particle detectors. These devices sense and record information about particles such as their masses, energies, momenta or points of origin. Different particles and different experiments require different types of particle detectors.

  6. New Techniques for Particle Acclerators

    SciTech Connect (OSTI)

    Sessler, Andrew M.

    1990-06-01

    A review is presented of the new techniques which have been proposed for use in particle accelerators. Attention is focused upon those areas where significant progress has been made in the last two years--in particular, upon two-beam accelerators, wakefield accelerators, and plasma focusers.

  7. New particle observations in SELEX

    SciTech Connect (OSTI)

    Jun, Soon Yung; /Carnegie Mellon U.

    2004-12-01

    Particle observations in data from SELEX, the charm hadro-production experiment (E781) at Fermilab are reviewed. These include observations of the doubly charmed baryon {Xi}{sub cc}{sup +}(3520) and the charmed strange meson D{sub sJ}{sup +}(2632).

  8. Engineered plant biomass feedstock particles

    DOE Patents [OSTI]

    Dooley, James H.; Lanning, David N.; Broderick, Thomas F.

    2011-10-11

    A novel class of flowable biomass feedstock particles with unusually large surface areas that can be manufactured in remarkably uniform sizes using low-energy comminution techniques. The feedstock particles are roughly parallelepiped in shape and characterized by a length dimension (L) aligned substantially with the grain direction and defining a substantially uniform distance along the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L. The particles exhibit a disrupted grain structure with prominent end and surface checks that greatly enhances their skeletal surface area as compared to their envelope surface area. The L.times.H dimensions define a pair of substantially parallel side surfaces characterized by substantially intact longitudinally arrayed fibers. The W.times.H dimensions define a pair of substantially parallel end surfaces characterized by crosscut fibers and end checking between fibers. The L.times.W dimensions define a pair of substantially parallel top surfaces characterized by some surface checking between longitudinally arrayed fibers. The feedstock particles are manufactured from a variety of plant biomass materials including wood, crop residues, plantation grasses, hemp, bagasse, and bamboo.

  9. Finding nonoverlapping substructures of a sparse matrix

    SciTech Connect (OSTI)

    Pinar, Ali; Vassilevska, Virginia

    2004-08-09

    Many applications of scientific computing rely on computations on sparse matrices, thus the design of efficient implementations of sparse matrix kernels is crucial for the overall efficiency of these applications. Due to the high compute-to-memory ratio and irregular memory access patterns, the performance of sparse matrix kernels is often far away from the peak performance on a modern processor. Alternative data structures have been proposed, which split the original matrix A into A{sub d} and A{sub s}, so that A{sub d} contains all dense blocks of a specified size in the matrix, and A{sub s} contains the remaining entries. This enables the use of dense matrix kernels on the entries of A{sub d} producing better memory performance. In this work, we study the problem of finding a maximum number of non overlapping rectangular dense blocks in a sparse matrix, which has not been studied in the sparse matrix community. We show that the maximum non overlapping dense blocks problem is NP-complete by using a reduction from the maximum independent set problem on cubic planar graphs. We also propose a 2/3-approximation algorithm for 2 times 2 blocks that runs in linear time in the number of nonzeros in the matrix. We discuss alternatives to rectangular blocks such as diagonal blocks and cross blocks and present complexity analysis and approximation algorithms.

  10. Finding Nonoverlapping Substructures of a Sparse Matrix

    SciTech Connect (OSTI)

    Pinar, Ali; Vassilevska, Virginia

    2005-08-11

    Many applications of scientific computing rely on computations on sparse matrices. The design of efficient implementations of sparse matrix kernels is crucial for the overall efficiency of these applications. Due to the high compute-to-memory ratio and irregular memory access patterns, the performance of sparse matrix kernels is often far away from the peak performance on a modern processor. Alternative data structures have been proposed, which split the original matrix A into A{sub d} and A{sub s}, so that A{sub d} contains all dense blocks of a specified size in the matrix, and A{sub s} contains the remaining entries. This enables the use of dense matrix kernels on the entries of A{sub d} producing better memory performance. In this work, we study the problem of finding a maximum number of nonoverlapping dense blocks in a sparse matrix, which is previously not studied in the sparse matrix community. We show that the maximum nonoverlapping dense blocks problem is NP-complete by using a reduction from the maximum independent set problem on cubic planar graphs. We also propose a 2/3-approximation algorithm that runs in linear time in the number of nonzeros in the matrix. This extended abstract focuses on our results for 2x2 dense blocks. However we show that our results can be generalized to arbitrary sized dense blocks, and many other oriented substructures, which can be exploited to improve the memory performance of sparse matrix operations.

  11. Trapping and Measuring Charged Particles in Liquids - Energy Innovation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Portal Advanced Materials Advanced Materials Find More Like This Return to Search Trapping and Measuring Charged Particles in Liquids Oak Ridge National Laboratory Contact ORNL About This Technology Publications: PDF Document Publication Printable fact sheet (552 KB) Planar aqueous Paul trap (PAPT) devices and experimental platform Planar aqueous Paul trap (PAPT) devices and experimental platform Technology Marketing SummaryA nanoscale version of the Paul ion trap was developed by

  12. Research in Elementary Particle Physics

    SciTech Connect (OSTI)

    White, Andrew Paul; De, Kaushik; Brandt, Andrew; Yu, Jaehoon; Farbin, Amir

    2015-02-02

    This report details the accomplishments and research results for the High Energy Physics Group at the University of Texas at Arlington at the Energy and Intensity Frontiers. For the Energy Frontier we have made fundamental contributions in the search for supersymmetric particles, proposed to explain the stabilization of the mass of the Higgs Boson – the agent giving mass to all known particles. We have also made major contributions to the search for additional Higgs Bosons and to the planning for future searches. This work has been carried out in the context of the ATLAS Experiment at CERN (European Nuclear Research Laboratory) and for which we have made major contributions to computing and data distribution and processing, and have worked to calibrate the detector and prepare upgraded electronics for the future. Our other contribution to the Energy Frontier has been to the International Linear Collider (ILC) project, potentially hosted by Japan, and to the Silicon Detector Concept (SiD) in particular. We have lead the development of the SiD Concept and have worked on a new form of precise energy measurement for particles from the high energy collisions of electrons and positrons at the ILC. For the Intensity Frontier, we have worked to develop the concept of Long Baseline Neutrino Experiment(s) (LBNE) at the Fermi National Accelerator Laboratory. Our contributions to detector development, neutrino beam studies, particle identification, software development will facilitate future studies of the oscillation of one type of neutrino into other type(s), establish the order of the neutrino masses, and, through an innovative new idea, allow us to create a beam of dark matter particles.

  13. Russian research capabilities: Findings of site visits

    SciTech Connect (OSTI)

    Wester, D.W.

    1994-02-01

    In June 1993, a proposal was presented to the International Environmental Institute (IEI) in Kennewick, Washington, to establish cooperation and coordination to further pursue the interests of the United States of America and the Republic of Russia in the application and promotion of environmental technology; characterization, treatment, handling, isolation, and disposal of hazardous and radioactive materials; conversion of defense sites to other purposes; and technology transfer, cooperative programs, joint technology development and contractual research. In response to this proposal, IEI and Pacific Northwest Laboratory (PNL) jointly provided funding to send Dr. Dennis W. Wester on a fact-finding mission to Novosibirsk, Moscow, and St. Petersburg, Russia. The trip covered a period of eight weeks, six of which were spent in Novosibirsk and adjoining or related cities and one of which was spent in each of Moscow and St. Petersburg. The general objectives of the trip were to establish a basis for cooperation between IEI and the Russian Academy of Sciences (RAS) for future coordination of mutual interests and objectives such as technology acquisition, development, demonstration, application, and commercialization; use of capabilities and assets developed by the U.S. Department of Energy (DOE) and the RAS; and expediting of cooperative agreements, personnel exchanges, joint ventures and other contractual relationships. The particular objectives of this trip were to evaluate the capabilities of the RAS to satisfy the technology needs associated with the cleanup of the Hanford Site and similar sites in the U.S. and to evaluate the expediency of establishing an IEI presence in Russia.

  14. Multi-particle inspection using associated particle sources

    DOE Patents [OSTI]

    Bingham, Philip R.; Mihalczo, John T.; Mullens, James A.; McConchie, Seth M.; Hausladen, Paul A.

    2016-02-16

    Disclosed herein are representative embodiments of methods, apparatus, and systems for performing combined neutron and gamma ray radiography. For example, one exemplary system comprises: a neutron source; a set of alpha particle detectors configured to detect alpha particles associated with neutrons generated by the neutron source; neutron detectors positioned to detect at least some of the neutrons generated by the neutron source; a gamma ray source; a set of verification gamma ray detectors configured to detect verification gamma rays associated with gamma rays generated by the gamma ray source; a set of gamma ray detectors configured to detect gamma rays generated by the gamma ray source; and an interrogation region located between the neutron source, the gamma ray source, the neutron detectors, and the gamma ray detectors.

  15. Fermilab | Science | Particle Physics | Benefits of Particle Physics |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Computing Computing In this Section: thumb Medicine thumb Homeland Security thumb Industry thumb Computing thumb Sciences thumb Workforce Development thumb A Growing List Computing: the World Wide Web The World Wide Web CERN scientist Tim Berners-Lee developed the World Wide Web to give particle physicists a tool to communicate quickly and effectively with globally dispersed colleagues at universities and laboratories. The Stanford Linear Accelerator Center had the first website in the

  16. Fermilab | Science | Particle Physics | Benefits of Particle Physics |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Sciences In this Section: thumb Medicine thumb Homeland Security thumb Industry thumb Computing thumb Sciences thumb Workforce Development thumb A Growing List Synchrotron light sources Particle physicists originally built electron accelerators to explore the fundamental nature of matter. At first, they looked on the phenomenon of synchrotron radiation as a troublesome problem that sapped electrons' acceleration energy. However, they soon saw the potential to use this nuisance

  17. Fermilab | Science | Particle Physics | Benefits of Particle Physics | A

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Growing List A Growing List In this Section: thumb Medicine thumb Homeland Security thumb Industry thumb Computing thumb Sciences thumb Workforce Development thumb A Growing List The science and technology of particle physics has contributed to many other areas of benefit to the nation's well-being. Food sterilization Medical isotope production Simulation of cancer treatments Reliability testing of nuclear weapons Scanning of shipping containers Proposed combination of PET and MRI imaging

  18. Circular, confined distribution for charged particle beams

    DOE Patents [OSTI]

    Garnett, Robert W.; Dobelbower, M. Christian

    1995-01-01

    A charged particle beam line is formed with magnetic optics that manipulate the charged particle beam to form the beam having a generally rectangular configuration to a circular beam cross-section having a uniform particle distribution at a predetermined location. First magnetic optics form a charged particle beam to a generally uniform particle distribution over a square planar area at a known first location. Second magnetic optics receive the charged particle beam with the generally square configuration and affect the charged particle beam to output the charged particle beam with a phase-space distribution effective to fold corner portions of the beam toward the core region of the beam. The beam forms a circular configuration having a generally uniform spatial particle distribution over a target area at a predetermined second location.

  19. Circular, confined distribution for charged particle beams

    DOE Patents [OSTI]

    Garnett, R.W.; Dobelbower, M.C.

    1995-11-21

    A charged particle beam line is formed with magnetic optics that manipulate the charged particle beam to form the beam having a generally rectangular configuration to a circular beam cross-section having a uniform particle distribution at a predetermined location. First magnetic optics form a charged particle beam to a generally uniform particle distribution over a square planar area at a known first location. Second magnetic optics receive the charged particle beam with the generally square configuration and affect the charged particle beam to output the charged particle beam with a phase-space distribution effective to fold corner portions of the beam toward the core region of the beam. The beam forms a circular configuration having a generally uniform spatial particle distribution over a target area at a predetermined second location. 26 figs.

  20. Process to make structured particles

    DOE Patents [OSTI]

    Knapp, Angela Michelle; Richard, Monique N; Luhrs, Claudia; Blada, Timothy; Phillips, Jonathan

    2014-02-04

    Disclosed is a process for making a composite material that contains structured particles. The process includes providing a first precursor in the form of a dry precursor powder, a precursor liquid, a precursor vapor of a liquid and/or a precursor gas. The process also includes providing a plasma that has a high field zone and passing the first precursor through the high field zone of the plasma. As the first precursor passes through the high field zone of the plasma, at least part of the first precursor is decomposed. An aerosol having a second precursor is provided downstream of the high field zone of the plasma and the decomposed first material is allowed to condense onto the second precursor to from structured particles.

  1. Boron doping a semiconductor particle

    DOE Patents [OSTI]

    Stevens, Gary Don; Reynolds, Jeffrey Scott; Brown, Louanne Kay

    1998-06-09

    A method (10,30) of boron doping a semiconductor particle using boric acid to obtain a p-type doped particle. Either silicon spheres or silicon powder is mixed with a diluted solution of boric acid having a predetermined concentration. The spheres are dried (16), with the boron film then being driven (18) into the sphere. A melt procedure mixes the driven boron uniformly throughout the sphere. In the case of silicon powder, the powder is metered out (38) into piles and melted/fused (40) with an optical furnace. Both processes obtain a p-type doped silicon sphere with desired resistivity. Boric acid is not a restricted chemical, is inexpensive, and does not pose any special shipping, handling, or disposal requirements.

  2. Boron doping a semiconductor particle

    DOE Patents [OSTI]

    Stevens, G.D.; Reynolds, J.S.; Brown, L.K.

    1998-06-09

    A method of boron doping a semiconductor particle using boric acid to obtain a p-type doped particle. Either silicon spheres or silicon powder is mixed with a diluted solution of boric acid having a predetermined concentration. The spheres are dried, with the boron film then being driven into the sphere. A melt procedure mixes the driven boron uniformly throughout the sphere. In the case of silicon powder, the powder is metered out into piles and melted/fused with an optical furnace. Both processes obtain a p-type doped silicon sphere with desired resistivity. Boric acid is not a restricted chemical, is inexpensive, and does not pose any special shipping, handling, or disposal requirements. 2 figs.

  3. Neutral particle beam intensity controller

    DOE Patents [OSTI]

    Dagenhart, W.K.

    1984-05-29

    The neutral beam intensity controller is based on selected magnetic defocusing of the ion beam prior to neutralization. The defocused portion of the beam is dumped onto a beam dump disposed perpendicular to the beam axis. Selective defocusing is accomplished by means of a magnetic field generator disposed about the neutralizer so that the field is transverse to the beam axis. The magnetic field intensity is varied to provide the selected partial beam defocusing of the ions prior to neutralization. The desired focused neutral beam portion passes along the beam path through a defining aperture in the beam dump, thereby controlling the desired fraction of neutral particles transmitted to a utilization device without altering the kinetic energy level of the desired neutral particle fraction. By proper selection of the magnetic field intensity, virtually zero through 100% intensity control of the neutral beam is achieved.

  4. CHARGED PARTICLE MULTIPLICITIES AT BRAHMS.

    SciTech Connect (OSTI)

    DEBBE, R., FOR THE BRAHMS COLLABORATION

    2001-07-30

    This report presents the measurement of charged particle multiplicity densities dN/d{eta} in ultrarelativistic heavy ion collisions as function of {eta} and the centrality of the collisions. This distributions were extracted from data collected by the BRAHMS collaboration during the first RHK run with gold ions at {radical}s{sub NN} = 130A {center_dot} GeV. The analysis method is described and, results are compared to some model predictions.

  5. Semiclassical geons at particle accelerators

    SciTech Connect (OSTI)

    Olmo, Gonzalo J.

    2014-02-01

    We point out that in certain four-dimensional extensions of general relativity constructed within the Palatini formalism stable self-gravitating objects with a discrete mass and charge spectrum may exist. The incorporation of nonlinearities in the electromagnetic field may effectively reduce their mass spectrum by many orders of magnitude. As a consequence, these objects could be within (or near) the reach of current particle accelerators. We provide an exactly solvable model to support this idea.

  6. Fermilab | Science | Particle Physics | Theory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Theory Chalkboard / blackboard with Questions for the Universe Theoretical physicists work to explain the way nature works at the smallest and largest levels, from the elementary particles that make up everything around us to the forces that influence the structure of entire galaxies. Physicists have discovered much about the way the universe works. Theorists' interpretation and synthesis of experimental results, research into quantum field theory, recognition of symmetries in nature, and

  7. Gyrokinetic approach in particle simulation

    SciTech Connect (OSTI)

    Lee, W.W.

    1981-10-01

    A new scheme for particle simulation based on the gyrophase-averaged Vlasov equation has been developed. It is suitable for studying low-frequency microinstabilities and the associated anomalous transport in magnetically confined plasmas. The scheme retains the gyroradius effects but not the gyromotion; it is, therefore, far more efficient and versatile than the conventional ones. Furthermore, the reduced Vlasov equation is also amenable to analytical studies.

  8. Particle Suspension Mechanisms - Supplemental Material

    SciTech Connect (OSTI)

    Dillon, M B

    2011-03-03

    This supplemental material provides a brief introduction to particle suspension mechanisms that cause exfoliated skin cells to become and remain airborne. The material presented here provides additional context to the primary manuscript and serves as background for designing possible future studies to assess the impact of skin cells as a source of infectious aerosols. This introduction is not intended to be comprehensive and interested readers are encouraged to consult the references cited.

  9. Condensation Particle Counter Instrument Handbook

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 Condensation Particle Counter Instrument Handbook C Kuang February 2016 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately

  10. EA-1922: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1922: Finding of No Significant Impact Combined Power and Biomass Heating System, Fort Yukon, Alaska Based on the EA, DOE finds that providng ...

  11. Neutral particle beam intensity controller

    SciTech Connect (OSTI)

    Dagenhart, W.K.

    1988-01-01

    A method is proposed in which an amplitude-modulated, rotating magnetic field is applied to an accelerated ion beam in a gas neutralizer to defocus the resultant neutral and ion beam in a controlled manner to control the intensity of the neutral beam along the beam axis at constant beam energy. Adjustments in the gas pressure determine the fraction of ions that is neutralized. The rotating magnetic field alters the orbits of the ions in the gas neutralizer before they are neutralized. By adjusting the gas pressure and the amplitude of the rotating magnetic field, one can control the fraction of neutral and ion particles transmitted out of the neutralizer along the central beam axis to a fusion device or other application. This method can also be used for applications where no neutralization gas is used and thus most of the beam remains in the ion state. The defocused neutral or ion particles are sprayed onto an actively cooled beam dump, which intercepts the deflected particles. The beam dump has a central opening for passage of the remaining beam along the central axis of the beam line. 4 refs., 4 figs.

  12. Engineered plant biomass feedstock particles

    DOE Patents [OSTI]

    Dooley, James H.; Lanning, David N.; Broderick, Thomas F.

    2012-04-17

    A new class of plant biomass feedstock particles characterized by consistent piece size and shape uniformity, high skeletal surface area, and good flow properties. The particles of plant biomass material having fibers aligned in a grain are characterized by a length dimension (L) aligned substantially parallel to the grain and defining a substantially uniform distance along the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L. In particular, the L.times.H dimensions define a pair of substantially parallel side surfaces characterized by substantially intact longitudinally arrayed fibers, the W.times.H dimensions define a pair of substantially parallel end surfaces characterized by crosscut fibers and end checking between fibers, and the L.times.W dimensions define a pair of substantially parallel top and bottom surfaces. The L.times.W surfaces of particles with L/H dimension ratios of 4:1 or less are further elaborated by surface checking between longitudinally arrayed fibers. The length dimension L is preferably aligned within 30.degree. parallel to the grain, and more preferably within 10.degree. parallel to the grain. The plant biomass material is preferably selected from among wood, agricultural crop residues, plantation grasses, hemp, bagasse, and bamboo.

  13. Modeling particle loss in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.; Nazaroff, William W.

    2003-04-01

    Empirical equations were developed and applied to predict losses of 0.01-100 {micro}m airborne particles making a single pass through 120 different ventilation duct runs typical of those found in mid-sized office buildings. For all duct runs, losses were negligible for submicron particles and nearly complete for particles larger than 50 {micro}m. The 50th percentile cut-point diameters were 15 {micro}m in supply runs and 25 {micro}m in return runs. Losses in supply duct runs were higher than in return duct runs, mostly because internal insulation was present in portions of supply duct runs, but absent from return duct runs. Single-pass equations for particle loss in duct runs were combined with models for predicting ventilation system filtration efficiency and particle deposition to indoor surfaces to evaluate the fates of particles of indoor and outdoor origin in an archetypal mechanically ventilated building. Results suggest that duct losses are a minor influence for determining indoor concentrations for most particle sizes. Losses in ducts were of a comparable magnitude to indoor surface losses for most particle sizes. For outdoor air drawn into an unfiltered ventilation system, most particles smaller than 1 {micro}m are exhausted from the building. Large particles deposit within the building, mostly in supply ducts or on indoor surfaces. When filters are present, most particles are either filtered or exhausted. The fates of particles generated indoors follow similar trends as outdoor particles drawn into the building.

  14. EIS-0372: Record of Decision and Floodplain Statement of Findings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Record of Decision and Floodplain Statement of Findings EIS-0372: Record of Decision and Floodplain Statement of Findings Bangor Hydro-Electric Company Northeast Reliability...

  15. EIS-0456: Record of Decision and Floodplain Statement of Findings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Record of Decision and Floodplain Statement of Findings EIS-0456: Record of Decision and Floodplain Statement of Findings Cushman Hydroelectric Project, Mason County, Washington...

  16. EA-1378: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    378: Finding of No Significant Impact EA-1378: Finding of No Significant Impact Site-Wide Environmental Assessment of National Renewable Energy Laboratory's National Wind ...

  17. EA-1698: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    8: Finding of No Significant Impact EA-1698: Finding of No Significant Impact Baldwin Wind Energy Center Project Baldwin Wind, LLC has requested to interconnect their proposed new...

  18. EA-1807: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1807: Finding of No Significant Impact Heartland Community College Wind Energy Project, Normal, McLean County, Illinois The Department of...

  19. EA-1819: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1819: Finding of No Significant Impact Kilowatts for Kenston Wind Energy Project, Chagrin Falls, Geauga County, Ohio The Department of Energy's...

  20. EA-1938: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1938: Finding of No Significant Impact Grieve Unit CO2 Enhanced Recovery Project, Natrona County, WY Western has reviewed BLM's EA "Grieve...

  1. EMGeo: Risk Minimizing Software for Finding Offshore Fossil Fuels...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find More Like This Return to Search EMGeo: Risk Minimizing Software for Finding Offshore ... developed advanced software for discovering and mapping offshore fossil fuel deposits. ...

  2. EA-1605: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    Finding of No Significant Impact EA-1605: Finding of No Significant Impact Biomass Cogeneration and Heating Facilities at the Savannah River Site, South Carolina The Department of...

  3. EA-1784: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4: Finding of No Significant Impact EA-1784: Finding of No Significant Impact Fotowatio Nevada Solar, LLC's APEX Solar Power Project in Clark County, Nevada The Department of...

  4. EA-1862: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1862: Finding of No Significant Impact Oneida Seven Generations Corporation: Energy Recovery Project, Green Bay, Wisconsin The U.S. Department...

  5. EA-1923: Mitigated Finding of No Significant Impact | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Mitigated Finding of No Significant Impact EA-1923: Mitigated Finding of No Significant Impact Green Energy School Wind Turbine Project on Saipan, Commonwealth of the Northern ...

  6. Jefferson Lab finds its man Mont (Inside Business) | Jefferson...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    https:www.jlab.orgnewsarticlesjefferson-lab-finds-its-man-mont-inside-business Jefferson Lab finds its man Mont Hugh Montgomery Hugh Montgomery, a British nuclear physicist...

  7. EA-1802: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2: Finding of No Significant Impact EA-1802: Finding of No Significant Impact Chicago View Wind Project Chicago Heights, Cook County, Illinois The Department of Energy's Proposed...

  8. Community Wind Handbook/Find an Installer | Open Energy Information

    Open Energy Info (EERE)

    * Submit Permit Applications * Find an Installer * Purchase Equipment * Plan for Maintenance Find an Installer Homeowners, ranchers, and small businesses can install wind...

  9. EA-1947: Draft Revised Finding of No Significant Impact | Department...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1947: Draft Revised Finding of No Significant Impact EA-1947: Draft Revised Finding of No Significant Impact Transfer of the Kansas City Plant, Kansas City, Missouri The National ...

  10. EA-1733: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1733: Finding of No Significant Impact Calpine Enhanced Geothermal Systems Project, Sonoma County, California DOE determined that providing...

  11. EA-1839: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    39: Final Environmental Assessment and Finding of No Significant Impact EA-1839: Final Environmental Assessment and Finding of No Significant Impact Department of Energy Loan ...

  12. EA-1829: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Final Environmental Assessment and Finding of No Significant Impact EA-1829: Final Environmental Assessment and Finding of No Significant Impact Phycal Algae Pilot Project, Wahiawa...

  13. EA-1866: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6: Final Environmental Assessment and Finding of No Significant Impact EA-1866: Final Environmental Assessment and Finding of No Significant Impact Argonne National Laboratory...

  14. EA-1889: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Final Environmental Assessment and Finding of No Significant Impact EA-1889: Final Environmental Assessment and Finding of No Significant Impact Disposal of Decommissioned,...

  15. EA-1869: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    69: Final Environmental Assessment and Finding of No Significant Impact EA-1869: Final Environmental Assessment and Finding of No Significant Impact General Motors LLC, Electric...

  16. EA-1769: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    9: Final Environmental Assessment and Finding of No Significant Impact EA-1769: Final Environmental Assessment and Finding of No Significant Impact Houston Advanced Research...

  17. Innovative Financing Solutions: Finding Money for Your Energy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Innovative Financing Solutions: Finding Money for Your Energy Efficiency Projects Innovative Financing Solutions: Finding Money for Your Energy Efficiency Projects Provides an ...

  18. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact Silver Peak Area Geothermal Exploration Project, Esmeralda County, NV December 7, 2012 EA-1863: Finding of No Significant Impact Vegetation...

  19. EA-1984: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1984: Finding of No Significant Impact Disposition of Five Signature Properties at Idaho National Laboratory DOE has decided to implement the...

  20. EA-1832: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    32: Finding of No Significant Impact EA-1832: Finding of No Significant Impact Rainer Biogas LLC Community Anaerobic Manure Digester, Enumclaw, King County, Washington The U.S....

  1. EA-1785: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    5: Finding of No Significant Impact EA-1785: Finding of No Significant Impact Phase III Anthropogenic Test Characterization Project, Mobile County, Alabama Based on the analyses in...

  2. EA-1853: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of No Significant Impact EA-1853: Finding of No Significant Impact Perrin Ranch Wind Energy Interconnection Project, Coconino County, Arizona Based on findings and analysis in...

  3. Method for fluidizing and coating ultrafine particles, device for fluidizing and coating ultrafine particles

    DOE Patents [OSTI]

    Li, Jie; Liu, Yung Y

    2015-01-20

    The invention provides a method for dispersing particles within a reaction field, the method comprising confining the particles to the reaction field using a standing wave. The invention also provides a system for coating particles, the system comprising a reaction zone; a means for producing fluidized particles within the reaction zone; a fluid to produce a standing wave within the reaction zone; and a means for introducing coating moieties to the reaction zone. The invention also provides a method for coating particles, the method comprising fluidizing the particles, subjecting the particles to a standing wave; and contacting the subjected particles with a coating moiety.

  4. Current experiments in particle physics - particle data group

    SciTech Connect (OSTI)

    Galic, H.; Lehar, F.; Kettle, P.R.

    1996-09-01

    This report contains summaries of current and recent experiments in Particle Physics. Included are experiments at BEPC (Beijing), BNL, CEBAF, CERN, CESR, DESY, FNAL, Frascati, ITEP (Moscow), JINR (Dubna), KEK, LAMPF, Novosibirsk, PNPI (St. Petersburg), PSI, Saclay, Serpukhov, SLAC, and TRIUMF, and also several proton decay and solar neutrino experiments. Excluded are experiments that finished taking data before 1991. Instructions are given for the World Wide Web (WWW) searching of the computer database (maintained under the SLAC-SPIRES system) that contains the summaries.

  5. Magnetic nano-particles | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Magnetic nano-particles The student will be involved in assembling CoFe2O4 nano-particles onto Si wafers for further studies by X-ray magnetic circular dichroism (XMCD) that will...

  6. Ordered transport and identification of particles

    DOE Patents [OSTI]

    Shera, E.B.

    1993-05-11

    A method and apparatus are provided for application of electrical field gradients to induce particle velocities to enable particle sequence and identification information to be obtained. Particle sequence is maintained by providing electroosmotic flow for an electrolytic solution in a particle transport tube. The transport tube and electrolytic solution are selected to provide an electroosmotic radius of >100 so that a plug flow profile is obtained for the electrolytic solution in the transport tube. Thus, particles are maintained in the same order in which they are introduced in the transport tube. When the particles also have known electrophoretic velocities, the field gradients introduce an electrophoretic velocity component onto the electroosmotic velocity. The time that the particles pass selected locations along the transport tube may then be detected and the electrophoretic velocity component calculated for particle identification. One particular application is the ordered transport and identification of labeled nucleotides sequentially cleaved from a strand of DNA.

  7. Ordered transport and identification of particles

    DOE Patents [OSTI]

    Shera, E. Brooks

    1993-01-01

    A method and apparatus are provided for application of electrical field gradients to induce particle velocities to enable particle sequence and identification information to be obtained. Particle sequence is maintained by providing electroosmotic flow for an electrolytic solution in a particle transport tube. The transport tube and electrolytic solution are selected to provide an electroosmotic radius of >100 so that a plug flow profile is obtained for the electrolytic solution in the transport tube. Thus, particles are maintained in the same order in which they are introduced in the transport tube. When the particles also have known electrophoretic velocities, the field gradients introduce an electrophoretic velocity component onto the electroosmotic velocity. The time that the particles pass selected locations along the transport tube may then be detected and the electrophoretic velocity component calculated for particle identification. One particular application is the ordered transport and identification of labeled nucleotides sequentially cleaved from a strand of DNA.

  8. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many...

  9. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    First Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 m in diameter, dispersed...

  10. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 m in diameter, dispersed in a...

  11. A research Program in Elementary Particle Physics

    SciTech Connect (OSTI)

    Sobel, Henry; Molzon, William; Lankford, Andrew; Taffard, Anyes; Whiteson, Daniel; Kirkby, David

    2013-07-25

    Work is reported in: Neutrino Physics, Cosmic Rays and Elementary Particles; Particle Physics and Charged Lepton Flavor Violation; Research in Collider Physics; Dark Energy Studies with BOSS and LSST.

  12. Article coated with flash bonded superhydrophobic particles

    DOE Patents [OSTI]

    Simpson, John T [Clinton, TN; Blue, Craig A [Knoxville, TN; Kiggans, Jr., James O [Oak Ridge, TN

    2010-07-13

    A method of making article having a superhydrophobic surface includes: providing a solid body defining at least one surface; applying to the surface a plurality of diatomaceous earth particles and/or particles characterized by particle sizes ranging from at least 100 nm to about 10 .mu.m, the particles being further characterized by a plurality of nanopores, wherein at least some of the nanopores provide flow through porosity, the particles being further characterized by a plurality of spaced apart nanostructured features that include a contiguous, protrusive material; flash bonding the particles to the surface so that the particles are adherently bonded to the surface; and applying a hydrophobic coating layer to the surface and the particles so that the hydrophobic coating layer conforms to the nanostructured features.

  13. Environmental applications of the particle analysis system

    SciTech Connect (OSTI)

    Moritz, E.J.; Hoffman, C.R.

    1993-09-28

    This study demonstrates the applicability of particle counting technology for analysis of various water treatment systems at the Rocky Flats Plant. The Particle Analysis System described in this study determined the water quality of samples from environmental remediation, stormwater treatment, and drinking water treatment operations. Samples were measured in either discrete or on-line mode. This data showed filtration efficiencies, particle counts, particle size distributions, and real-time treatment system performance. Particle counting proved more sensitive than the turbidimetric measurement technique commonly used by the water treatment industry. Particle counting is a two-dimensional measurement of counts and sizes, whereas turbidity is a one-dimensional measurement of water clarity. Samples showing identical turbidities could be distinguished easily with the Particle Analysis System. The Particle Analysis System proved to be an efficient and reliable water quality measurement tool, and it is applicable to a variety of water treatment systems at the Rocky Flats Plant.

  14. ARM - Measurement - Cloud particle size distribution

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    from you Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Cloud particle size distribution The number of cloud particles present in any given volume of air...

  15. ARM - Measurement - Cloud particle number concentration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    from you Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Cloud particle number concentration The total number of cloud particles present in any given volume...

  16. Deformation Behavior of Sub-micron and Micron Sized Alumina Particles in Compression.

    SciTech Connect (OSTI)

    Sarobol, Pylin; Chandross, Michael E.; Carroll, Jay; Mook, William; Boyce, Brad; Kotula, Paul G.; McKenzie, Bonnie B.; Bufford, Daniel Charles; Hall, Aaron Christopher.

    2014-09-01

    The ability to integrate ceramics with other materials has been limited due to high temperature (>800degC) ceramic processing. Recently, researchers demonstrated a novel process , aerosol deposition (AD), to fabricate ceramic films at room temperature (RT). In this process, sub - micro n sized ceramic particles are accelerated by pressurized gas, impacted on the substrate, plastically deformed, and form a dense film under vacuum. This AD process eliminates high temperature processing thereby enabling new coatings and device integration, in which ceramics can be deposited on metals, plastics, and glass. However, k nowledge in fundamental mechanisms for ceramic particle s to deform and form a dense ceramic film is still needed and is essential in advancing this novel RT technology. In this wo rk, a combination of experimentation and atomistic simulation was used to determine the deformation behavior of sub - micron sized ceramic particle s ; this is the first fundamental step needed to explain coating formation in the AD process . High purity, singl e crystal, alpha alumina particles with nominal size s of 0.3 um and 3.0 um were examined. Particle characterization, using transmission electron microscopy (TEM ), showed that the 0.3 u m particles were relatively defect - free single crystals whereas 3.0 u m p articles were highly defective single crystals or particles contained low angle grain boundaries. Sub - micron sized Al 2 O 3 particles exhibited ductile failure in compression. In situ compression experiments showed 0.3um particles deformed plastically, fractured, and became polycrystalline. Moreover, dislocation activit y was observed within the se particles during compression . These sub - micron sized Al 2 O 3 particles exhibited large accum ulated strain (2 - 3 times those of micron - sized particles) before first fracture. I n agreement with the findings from experimentation , a tomistic simulation s of nano - Al 2 O 3 particles showed dislocation slip and

  17. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Mapping Particle Charges in Battery Electrodes Print Friday, 26 July 2013 14:18 The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how

  18. ARM - Measurement - Aerosol particle size distribution

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AOS : Aerosol Observing System CSPHOT : Cimel Sunphotometer HTDMA : Humidified Tandem Differential Mobility Analyzer SMPS : Scanning mobility particle sizer TDMA : Tandem...

  19. Georges Charpak, Particle Detectors, and Multiwire Chambers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Georges Charpak, Particle Detectors, and Multiwire Chambers Resources with Additional Information * Patents Georges Charpak Courtesy of CERN Nobel laureate Georges Charpak [was] a pioneer in the art and science of particle detection ... . [He] developed a host of particle detectors used throughout experimental particle physics. In 1968, he invented and developed the first multiwire proportional chamber, for which he won the [Physics] Nobel Prize in 1992 ... . The multiwire chamber differed from

  20. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused

  1. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused

  2. How Particle Accelerators Work | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Particle Accelerators Work How Particle Accelerators Work June 18, 2014 - 4:11pm Addthis Infographic by <a href="/node/379579">Sarah Gerrity</a>, Energy Department. Infographic by Sarah Gerrity, Energy Department. Ben Dotson Ben Dotson Former Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? A particle accelerator is a machine that accelerates elementary particles, such as electrons or protons, to very high energies. Whether it's

  3. Yukawa particles in a confining potential

    SciTech Connect (OSTI)

    Girotto, Matheus Levin, Yan; Santos, Alexandre P. dos; Colla, Thiago

    2014-07-07

    We study the density distribution of repulsive Yukawa particles confined by an external potential. In the weak coupling limit, we show that the mean-field theory is able to accurately account for the particle distribution. In the strong coupling limit, the correlations between the particles become important and the mean-field theory fails. For strongly correlated systems, we construct a density functional theory which provides an excellent description of the particle distribution, without any adjustable parameters.

  4. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused

  5. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused

  6. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Print Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the ALS have revealed chemical reactions on and in atmospheric aerosol particles that caused

  7. Composition and Reactions of Atmospheric Aerosol Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Composition and Reactions of Atmospheric Aerosol Particles Composition and Reactions of Atmospheric Aerosol Particles Print Wednesday, 29 June 2005 00:00 Microscopic aerosol particles in the atmosphere contain carbonaceous components from mineral dust and combustion emissions released from around the world. How long these tiny particles remain in the atmosphere can have a huge impact on the global climate. Measurements based on high-resolution scanning transmission x-ray images obtained at the

  8. Optically active biological particle distinguishing apparatus

    DOE Patents [OSTI]

    Salzman, Gary C.; Kupperman, Robert H.

    1989-01-01

    The disclosure is directed to organic particle sorting and identification. High frequency pulses of circularly polarized light, alternating between left and right, intersect a fast moving stream of organic particles. Circular intensity differential scattering and linear intensity differential scattering are monitored to uniquely identify a variety of organic particles.

  9. Means for counteracting charged particle beam divergence

    DOE Patents [OSTI]

    Hooper, Jr., Edwin B.

    1978-01-01

    To counteract charge particle beam divergence, magnetic field-generating means are positioned along the edges of a charged particle beam to be controlled, such as to deflect and redirect particles tending to diverge from a desired beam direction. By selective arrangement of the magnetic field-generating means, the entire beam may be deflected and guided into different directions.

  10. Quantitative organic vapor-particle sampler

    DOE Patents [OSTI]

    Gundel, Lara; Daisey, Joan M.; Stevens, Robert K.

    1998-01-01

    A quantitative organic vapor-particle sampler for sampling semi-volatile organic gases and particulate components. A semi-volatile organic reversible gas sorbent macroreticular resin agglomerates of randomly packed microspheres with the continuous porous structure of particles ranging in size between 0.05-10 .mu.m for use in an integrated diffusion vapor-particle sampler.

  11. Electroless plating apparatus for discrete microsized particles

    DOE Patents [OSTI]

    Mayer, Anton

    1978-01-01

    Method and apparatus are disclosed for producing very uniform coatings of a desired material on discrete microsized particles by electroless techniques. Agglomeration or bridging of the particles during the deposition process is prevented by imparting a sufficiently random motion to the particles that they are not in contact with each other for a time sufficient for such to occur.

  12. Electrolytic plating apparatus for discrete microsized particles

    DOE Patents [OSTI]

    Mayer, Anton

    1976-11-30

    Method and apparatus are disclosed for electrolytically producing very uniform coatings of a desired material on discrete microsized particles. Agglomeration or bridging of the particles during the deposition process is prevented by imparting a sufficiently random motion to the particles that they are not in contact with a powered cathode for a time sufficient for such to occur.

  13. Floodplain Assessment and Statement of Findings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Statement of Findings Floodplain Assessment and Statement of Findings Floodplain Assessment and Statement of Findings for Installation of a Renewable Energy Anaerobic Digester Facility at the University of California, Davis in Yolo County, California. Statement of Findings (450.47 KB) More Documents & Publications Floodplain Assessment for Installation of a Renewable Energy Anaerobic Digester Facility

  14. Photobiomolecular metallic particles and films

    DOE Patents [OSTI]

    Hu, Zhong-Cheng

    2003-05-06

    The method of the invention is based on the unique electron-carrying function of a photocatalytic unit such as the photosynthesis system I (PSI) reaction center of the protein-chlorophyll complex isolated from chloroplasts. The method employs a photo-biomolecular metal deposition technique for precisely controlled nucleation and growth of metallic clusters/particles, e.g., platinum, palladium, and their alloys, etc., as well as for thin-film formation above the surface of a solid substrate. The photochemically mediated technique offers numerous advantages over traditional deposition methods including quantitative atom deposition control, high energy efficiency, and mild operating condition requirements.

  15. Gated charged-particle trap

    DOE Patents [OSTI]

    Benner, W. Henry

    1999-01-01

    The design and operation of a new type of charged-particle trap provides simultaneous measurements of mass, charge, and velocity of large electrospray ions. The trap consists of a detector tube mounted between two sets of center-bored trapping plates. Voltages applied to the trapping plates define symmetrically-opposing potential valleys which guide axially-injected ions to cycle back and forth through the charge-detection tube. A low noise charge-sensitive amplifier, connected to the tube, reproduces the image charge of individual ions as they pass through the detector tube. Ion mass is calculated from measurement of ion charge and velocity following each passage through the detector.

  16. Shifting Standards: Experiments in Particle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Shifting Standards: Experiments in Particle Physics in the Twentieth Century Allan Franklin University of Colorado July 15, 2015 4:00 p.m. (coffee @ 3:30) In this paper I will discuss changes in the presentation of experimental results from the early 20 th century to the present and their implications. In particular I will look at the history of high-energy physics from the 1960s to the present to see the evolution of the five-standards deviation discovery criterion. This history will

  17. Optical double-slit particle measuring system

    DOE Patents [OSTI]

    Tichenor, D.A.; Wang, J.C.F.; Hencken, K.R.

    1982-03-25

    A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3..mu..m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.

  18. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Direct Imaging of Swollen Microgel Particles First Direct Imaging of Swollen Microgel Particles Print Wednesday, 22 February 2006 00:00 Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like

  19. Optical double-slit particle measuring system

    DOE Patents [OSTI]

    Hencken, Kenneth R.; Tichenor, Daniel A.; Wang, James C. F.

    1984-01-01

    A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3 .mu.m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.

  20. Neutral particle beam intensity controller

    DOE Patents [OSTI]

    Dagenhart, William K. (Oak Ridge, TN)

    1986-01-01

    A neutral beam intensity controller is provided for a neutral beam generator in which a neutral beam is established by accelerating ions from an ion source into a gas neutralizer. An amplitude modulated, rotating magnetic field is applied to the accelerated ion beam in the gas neutralizer to defocus the resultant neutral beam in a controlled manner to achieve intensity control of the neutral beam along the beam axis at constant beam energy. The rotating magnetic field alters the orbits of ions in the gas neutralizer before they are neutralized, thereby controlling the fraction of neutral particles transmitted out of the neutralizer along the central beam axis to a fusion device or the like. The altered path or defocused neutral particles are sprayed onto an actively cooled beam dump disposed perpendicular to the neutral beam axis and having a central open for passage of the focused beam at the central axis of the beamline. Virtually zero therough 100% intensity control is achieved by varying the magnetic field strength without altering the ion source beam intensity or its species yield.

  1. On the dry deposition of submicron particles

    SciTech Connect (OSTI)

    Wesely, M. L.

    1999-10-08

    The air-surface exchange of particles can have a strong role in determining the amount, size, and chemical composition of particles in the troposphere. Here the authors consider only dry processes (deposition processes not directly aided by precipitation) and mostly address particles less than about 2 {micro}m in diameter (often referred to as submicron particles because most of such particles are less than 1 {micro}m in diameter). The processes that control the dry exchange of particulate material between the atmosphere and the surface of the Earth are numerous, highly varied, and sometimes poorly understood. As a result, determining which of the surface processes to parameterize or simulate in modeling the tropospheric mass budget of a particulate substance can be a significant challenge. Dry deposition, for example, can be controlled by a combination of Brownian diffusion, impaction, interception, and gravitational settling, depending on the size of the particles, the roughness of the surface on both micrometeorological and microscopic scales, the geometrical structure of vegetative canopies, and other surface characteristics such as wetness. Particles can be added to the lower atmosphere by resuspension from land surfaces and sea spray. The roles of rapid gas-to-particle conversion and growth or shrinkage of particles as a result of water condensation or evaporation in the lower few meters of the atmosphere can also have a significant impact on particle concentrations in the lower atmosphere. Here, a few micrometeorological observations and inferences on particle air-surface exchange are briefly addressed.

  2. Particle Measurement Methodology: Comparison of On-road and Lab...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Measurement Methodology: Comparison of On-road and Lab Diesel Particle Size Distributions Particle Measurement Methodology: Comparison of On-road and Lab Diesel Particle Size ...

  3. Particle creation by naked singularities in higher dimensions

    SciTech Connect (OSTI)

    Miyamoto, Umpei; Nemoto, Hiroya; Shimano, Masahiro

    2011-04-15

    Recently, the possibility was pointed out by one of the present authors and his collaborators that an effective naked singularity referred to as ''a visible border of spacetime'' is generated by high-energy particle collision in the context of large extra dimensions or TeV-scale gravity. In this paper, we investigate the particle creation by a naked singularity in general dimensions, while adopting a model in which a marginally naked singularity forms in the collapse of a homothetic lightlike pressureless fluid. We find that the spectrum deviates from that of Hawking radiation due to scattering near the singularity but can be recast in quasithermal form. The temperature is always higher than that of Hawking radiation of a same-mass black hole, and can be arbitrarily high depending on a parameter in the model. This implies that, in principle, the naked singularity may be distinguished from a black hole in collider experiments.

  4. Resonant wave-particle interactions modified by intrinsic Alfvenic turbulence

    SciTech Connect (OSTI)

    Wu, C. S.; Lee, K. H.; Wang, C. B.; Wu, D. J.

    2012-08-15

    The concept of wave-particle interactions via resonance is well discussed in plasma physics. This paper shows that intrinsic Alfven waves can qualitatively modify the physics discussed in conventional linear plasma kinetic theories. It turns out that preexisting Alfven waves can affect particle motion along the ambient magnetic field and, moreover, the ensuing force field is periodic in time. As a result, the meaning of the usual Landau and cyclotron resonance conditions becomes questionable. It turns out that this effect leads us to find a new electromagnetic instability. In such a process intrinsic Alfven waves not only modify the unperturbed distribution function but also result in a different type of cyclotron resonance which is affected by the level of turbulence. This instability might enable us to better our understanding of the observed radio emission processes in the solar atmosphere.

  5. Method for non-contact particle manipulation and control of particle spacing along an axis

    DOE Patents [OSTI]

    Goddard, Gregory Russ; Kaduchak, Gregory; Jett, James Hubert; Graves, Steven Wayde

    2012-09-11

    Method and system for uniformly spacing particles in a flowing system comprising suspending particles in an elongated fluid filled cavity; exposing said cavity to an axial acoustic standing wave field, wherein said axial acoustic standing wave field drives said particles to nodal and anti-nodal positions along the center axis of said cavity to result in uniformly spaced particles; and focusing said particles to the center axis of said cavity.

  6. Method for non-contact particle manipulation and control of particle spacing along an axis

    DOE Patents [OSTI]

    Goddard, Gregory R; Kaduchak, Gregory; Jett, James H; Graves, Steven W

    2015-01-13

    Method and system for uniformly spacing particles in a flowing system comprising suspending particles in an elongated fluid filled cavity; exposing said cavity to an axial acoustic standing wave field, wherein said axial acoustic standing wave field drives said particles to nodal and anti-nodal positions along the center axis of said cavity to result in uniformly spaced particles; and focusing said particles to the center axis of said cavity.

  7. Method for producing ceramic particles and agglomerates

    DOE Patents [OSTI]

    Phillips, Jonathan; Gleiman, Seth S.; Chen, Chun-Ku

    2001-01-01

    A method for generating spherical and irregularly shaped dense particles of ceramic oxides having a controlled particle size and particle size distribution. An aerosol containing precursor particles of oxide ceramics is directed into a plasma. As the particles flow through the hot zone of the plasma, they melt, collide, and join to form larger particles. If these larger particles remain in the hot zone, they continue melting and acquire a spherical shape that is retained after they exit the hot zone, cool down, and solidify. If they exit the hot zone before melting completely, their irregular shape persists and agglomerates are produced. The size and size distribution of the dense product particles can be controlled by adjusting several parameters, the most important in the case of powder precursors appears to be the density of powder in the aerosol stream that enters the plasma hot zone. This suggests that particle collision rate is responsible for determining ultimate size of the resulting sphere or agglomerate. Other parameters, particularly the gas flow rates and the microwave power, are also adjusted to control the particle size distribution.

  8. Gated charged-particle trap

    DOE Patents [OSTI]

    Benner, W.H.

    1999-03-09

    The design and operation of a new type of charged-particle trap provides simultaneous measurements of mass, charge, and velocity of large electrospray ions. The trap consists of a detector tube mounted between two sets of center-bored trapping plates. Voltages applied to the trapping plates define symmetrically-opposing potential valleys which guide axially-injected ions to cycle back and forth through the charge-detection tube. A low noise charge-sensitive amplifier, connected to the tube, reproduces the image charge of individual ions as they pass through the detector tube. Ion mass is calculated from measurement of ion charge and velocity following each passage through the detector. 5 figs.

  9. Coaxial microreactor for particle synthesis

    DOE Patents [OSTI]

    Bartsch, Michael; Kanouff, Michael P; Ferko, Scott M; Crocker, Robert W; Wally, Karl

    2013-10-22

    A coaxial fluid flow microreactor system disposed on a microfluidic chip utilizing laminar flow for synthesizing particles from solution. Flow geometries produced by the mixing system make use of hydrodynamic focusing to confine a core flow to a small axially-symmetric, centrally positioned and spatially well-defined portion of a flow channel cross-section to provide highly uniform diffusional mixing between a reactant core and sheath flow streams. The microreactor is fabricated in such a way that a substantially planar two-dimensional arrangement of microfluidic channels will produce a three-dimensional core/sheath flow geometry. The microreactor system can comprise one or more coaxial mixing stages that can be arranged singly, in series, in parallel or nested concentrically in parallel.

  10. RFQ device for accelerating particles

    DOE Patents [OSTI]

    Shepard, Kenneth W.; Delayen, Jean R.

    1995-01-01

    A superconducting radio frequency quadrupole (RFQ) device includes four spaced elongated, linear, tubular rods disposed parallel to a charged particle beam axis, with each rod supported by two spaced tubular posts oriented radially with respect to the beam axis. The rod and post geometry of the device has four-fold rotation symmetry, lowers the frequency of the quadrupole mode below that of the dipole mode, and provides large dipole-quadrupole mode isolation to accommodate a range of mechanical tolerances. The simplicity of the geometry of the structure, which can be formed by joining eight simple T-sections, provides a high degree of mechanical stability, is insensitive to mechanical displacement, and is particularly adapted for fabrication with superconducting materials such as niobium.

  11. RFQ device for accelerating particles

    DOE Patents [OSTI]

    Shepard, K.W.; Delayen, J.R.

    1995-06-06

    A superconducting radio frequency quadrupole (RFQ) device includes four spaced elongated, linear, tubular rods disposed parallel to a charged particle beam axis, with each rod supported by two spaced tubular posts oriented radially with respect to the beam axis. The rod and post geometry of the device has four-fold rotation symmetry, lowers the frequency of the quadrupole mode below that of the dipole mode, and provides large dipole-quadrupole mode isolation to accommodate a range of mechanical tolerances. The simplicity of the geometry of the structure, which can be formed by joining eight simple T-sections, provides a high degree of mechanical stability, is insensitive to mechanical displacement, and is particularly adapted for fabrication with superconducting materials such as niobium. 5 figs.

  12. Phosphorus doping a semiconductor particle

    DOE Patents [OSTI]

    Stevens, G.D.; Reynolds, J.S.

    1999-07-20

    A method of phosphorus doping a semiconductor particle using ammonium phosphate is disclosed. A p-doped silicon sphere is mixed with a diluted solution of ammonium phosphate having a predetermined concentration. These spheres are dried with the phosphorus then being diffused into the sphere to create either a shallow or deep p-n junction. A good PSG glass layer is formed on the surface of the sphere during the diffusion process. A subsequent segregation anneal process is utilized to strip metal impurities from near the p-n junction into the glass layer. A subsequent HF strip procedure is then utilized to removed the PSG layer. Ammonium phosphate is not a restricted chemical, is inexpensive, and does not pose any special shipping, handling, or disposal requirement. 1 fig.

  13. Phosphorous doping a semiconductor particle

    DOE Patents [OSTI]

    Stevens, Gary Don; Reynolds, Jeffrey Scott

    1999-07-20

    A method (10) of phosphorus doping a semiconductor particle using ammonium phosphate. A p-doped silicon sphere is mixed with a diluted solution of ammonium phosphate having a predetermined concentration. These spheres are dried (16, 18), with the phosphorus then being diffused (20) into the sphere to create either a shallow or deep p-n junction. A good PSG glass layer is formed on the surface of the sphere during the diffusion process. A subsequent segregation anneal process is utilized to strip metal impurities from near the p-n junction into the glass layer. A subsequent HF strip procedure is then utilized to removed the PSG layer. Ammonium phosphate is not a restricted chemical, is inexpensive, and does not pose any special shipping, handling, or disposal requirement.

  14. Micro-Spectroscopic Imaging and Characterization of Individually Identified Ice Nucleating Particles from a Case Field Study

    SciTech Connect (OSTI)

    Knopf, Daniel A.; Alpert, Peter A.; Wang, Bingbing; O'Brien, Rachel E.; Kelly, Stephen T.; Laskin, Alexander; Gilles, Mary K.; Moffet, Ryan C.

    2014-09-03

    The effect of anthropogenic and biogenic organic particles on atmospheric glaciation processes is poorly understood. We use an optical microscopy (OM) setup to identify the location of ice nuclei (IN) active in immersion freezing and deposition ice nucleation for temperatures of 200-273 K within a large population of particles sampled from an ambient environment. Applying multi-modal micro-spectroscopy methods we characterize the physicochemical properties of individual IN in particle populations collected in central California. Chemical composition and mixing state analysis of particle populations are performed to identify characteristic particle-type classes. All particle-types contained organic material. Particles in these samples take up water at subsaturated conditions, induce immersion freezing at subsaturated and saturated conditions above 226 K, and act as deposition IN below 226 K. The identified IN belong to the most common particle-type classes observed in the field samples: organic coated sea salt, Na-rich, and secondary and refractory carbonaceous particles. Based on these observations, we suggest that the IN are not always particles with unique chemical composition and exceptional ice nucleation propensity; rather, they are common particles in the ambient particle population. Thus, particle composition and morphology alone are insufficient to assess their potential to act as IN. The results suggest that particle-type abundance is also a crucial factor in determining the ice nucleation efficiency of specific IN types. These findings emphasize that ubiquitous organic particles can induce ice nucleation under atmospherically relevant conditions and that they may play an important role in atmospheric glaciation processes.

  15. Elementary particle physics---Experimental

    SciTech Connect (OSTI)

    Lord, J.J.; Burnett, T.H.; Wilkes, R.J.

    1990-09-20

    We are continuing a research program in high energy experimental particle physics and particle astrophysics. Studies of high energy hadronic interactions were performed using several techniques, in addition, a high energy leptoproduction experiment was continued at the Fermi National Accelerator Laboratory. We are participants in a joint US/Japan program to study nuclear interactions at energies two orders of magnitude greater than those of existing accelerators. The data are being collected with ballon-borne emulsion chambers. The properties of nuclear interactions at these high energies will reveal whether new production mechanisms come into play due to the high nuclear densities and temperatures obtained. We carried out closely related studies of hadronic interactions in emulsions exposed to high energy accelerator beams. We are members of a large international collaboration which has exposed emulsion chamber detectors to beams of {sup 32}S and {sup 16}O with energy 60 and 200 GeV/n at CERN and 15 GeV/n at Brookhaven National Laboratory. The primary objectives of this program are to determine the existence and properties of the hypothesized quark-gluon phase of matter, and its possible relation to a variety of anomalous observations. Studies of leptoproduction processes at high energies involve two separate experiments, one using the Tevatron 500 GeV muon beam and the other exploring the >TeV regime. We are participants in Fermilab experiment E665 employing a comprehensive counter/streamer chamber detector system. During the past year we joined the DUMAND Collaboration, and have been assigned responsibility for development and construction of critical components for the deep undersea neutrino detector facility, to be deployed in 1991. In addition, we are making significant contributions to the design of the triggering system to be used.

  16. GPU COMPUTING FOR PARTICLE TRACKING

    SciTech Connect (OSTI)

    Nishimura, Hiroshi; Song, Kai; Muriki, Krishna; Sun, Changchun; James, Susan; Qin, Yong

    2011-03-25

    This is a feasibility study of using a modern Graphics Processing Unit (GPU) to parallelize the accelerator particle tracking code. To demonstrate the massive parallelization features provided by GPU computing, a simplified TracyGPU program is developed for dynamic aperture calculation. Performances, issues, and challenges from introducing GPU are also discussed. General purpose Computation on Graphics Processing Units (GPGPU) bring massive parallel computing capabilities to numerical calculation. However, the unique architecture of GPU requires a comprehensive understanding of the hardware and programming model to be able to well optimize existing applications. In the field of accelerator physics, the dynamic aperture calculation of a storage ring, which is often the most time consuming part of the accelerator modeling and simulation, can benefit from GPU due to its embarrassingly parallel feature, which fits well with the GPU programming model. In this paper, we use the Tesla C2050 GPU which consists of 14 multi-processois (MP) with 32 cores on each MP, therefore a total of 448 cores, to host thousands ot threads dynamically. Thread is a logical execution unit of the program on GPU. In the GPU programming model, threads are grouped into a collection of blocks Within each block, multiple threads share the same code, and up to 48 KB of shared memory. Multiple thread blocks form a grid, which is executed as a GPU kernel. A simplified code that is a subset of Tracy++ [2] is developed to demonstrate the possibility of using GPU to speed up the dynamic aperture calculation by having each thread track a particle.

  17. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    in Kahuku, O'ahu, Hawaii May 18, 2010 EA-1699: Finding of No Significant Impact PopeDouglas Third Combustor Expansion Project, Alexandria, Minnesota May 7, 2010 EA-1635: Finding...

  18. EIS-0365: Record of Decision and Floodplain Statement of Findings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Record of Decision and Floodplain Statement of Findings EIS-0365: Record of Decision and Floodplain Statement of Findings Imperial-Mexicali 230-kV Transmission Lines DOE announces...

  19. Accident Investigation Board (AIB) findings about the drum breach...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Accident Investigation Board findings Accident Investigation Board (AIB) findings about the drum breach at WIPP WHEN: Apr 23, 2015 5:30 PM - 7:00 PM WHERE: Fuller Lodge 2132 ...

  20. EA-1767: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    7: Finding of No Significant Impact EA-1767: Finding of No Significant Impact Virginia State Energy Program's Cephas C&D Wastes Biomass Project, Richmond, Virginia Based on the...

  1. EA-1814: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1814: Finding of No Significant Impact City of Montpelier Combined Heat and Power, and District Energy System, Montpelier, Vermont The U.S....

  2. EA-1726: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1726: Finding of No Significant Impact Kahuku Wind Power, LLC, Construction of the Kahuku Wind Power Facility in Kahuku, O'ahu, Hawaii The ...

  3. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Project, Zachary, Louisiana November 24, 2010 EA-1797: Finding of No Significant Impact Agua Caliente Solar Project in Yuma County, Arizona November 19, 2010 EA-1727: Finding of No...

  4. Commercial Building Energy Asset Score: Pilot Findings and Program...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Commercial Building Energy Asset Score: Pilot Findings and Program Update The webinar was held on April 16, 2014, to share the findings from the 2013 Pilot and provide a program ...

  5. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2012 EA-1812: Finding of No Significant Impact Haxtun Wind Energy Project, Logan and Phillips Counties, CO January 3, 2012 EA-1606: Finding of No Significant Impact Proposed Use...

  6. EERE 2014 Wind Technologies Market Report Finds Wind Power at...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2014 Wind Technologies Market Report Finds Wind Power at Record Low Prices EERE 2014 Wind Technologies Market Report Finds Wind Power at Record Low Prices August 10, 2015 - 11:00am ...

  7. EA-1894: Finding of No Significant Impact | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Albeni Falls Flexible Winter Lake Operations, Bonner, Idaho As a result of the analysis in this EA, I have the following findings. I find that: 1) the FWPO is not a substantial...

  8. EA-1904: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-1904: Finding of No Significant Impact Linac Coherent Light Source II at Stanford Linear Accelerator Laboratory, San Mateo, CA Based on the findings in the EA, DOE has...

  9. Title 16 USC 1600 Congressional Findings | Open Energy Information

    Open Energy Info (EERE)

    600 Congressional Findings Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- StatuteStatute: Title 16 USC 1600 Congressional FindingsLegal Abstract...

  10. EA-1947: Finding of No Significant Impact | Department of Energy

    Energy Savers [EERE]

    7: Finding of No Significant Impact EA-1947: Finding of No Significant Impact Transfer of ... and NNSA is issuing this FONSI. EA-1947FONSI-2013.pdf (169.65 KB) More Documents ...

  11. EA-1833: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1833: Finding of No Significant Impact The City of El Dorado Wind Energy Project, El Dorado, Butler County, Kansas The U.S. Department of...

  12. EA-1928: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1928: Finding of No Significant Impact White-Tailed Deer Management at Brookhaven National Lab, Upton, New York Based on the information in the...

  13. EA-1665: Final Environmental Assessment and Finding of No Significant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    5: Final Environmental Assessment and Finding of No Significant Impact EA-1665: Final Environmental Assessment and Finding of No Significant Impact Davis-Kingman Tap 69-kV...

  14. Rainbows and Leprechauns: Finding Gold in Partnerships (101)...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Rainbows and Leprechauns: Finding Gold in Partnerships (101) Rainbows and Leprechauns: Finding Gold in Partnerships (101) March 17, 2016 1:00PM to 2:30PM EDT

  15. STEM Volunteer Training: Types of Volunteering and Where to Find...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Types of Volunteering and Where to Find Opportunities STEM Volunteer Training: Types of Volunteering and Where to Find Opportunities April 14, 2016 3:00PM to 4:00PM EDT

  16. EA-1809: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1809: Finding of No Significant Impact White Earth Nation Wind Energy Project II, Becker and Mahnomen Counties, MN DOE's Golden Field Office has...

  17. EA-1933: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1933: Finding of No Significant Impact Yakama Nation Drop 4 Hydropower Project, Yakama Nation Reservation, WA Based on the Final EA, DOE has...

  18. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    County, Nevada June 9, 2011 EA-1770: Finding of No Significant Impact Photovoltaic Solar Project at the Durango, Colorado Site June 3, 2011 EA-1858: Finding of No Significant...

  19. ULTRA-DEEP WATER ADVISORY COMMITTEE FINDINGS AND

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ULTRA-DEEP WATER ADVISORY COMMITTEE FINDINGS AND RECOMMENDATIONS 2014 ULTRA-DEEPWATER ADVISORY COMMITTEE COMMITTEE FINDINGS AND RECOMMENDATIONS i Table of Contents Research and Development Program Committee ............................................ 1 Sunset Committee .................................................................................................. 5 Advisory Committee Members ........................................................................... 7 ULTRA-DEEPWATER

  20. EA-1917: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1917: Finding of No Significant Impact Wave Energy Test Facility Project, Newport, OR Based on the information presented in the Final EA, (DOE...

  1. EA-1656: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-1656: Finding of No Significant Impact MARET Center at Crowder College, Neosho, Missouri The U.S. Department of Energy is preparing an...

  2. EIS-0369: Floodplain Statement of Finding | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    9: Floodplain Statement of Finding EIS-0369: Floodplain Statement of Finding Rail Alignment for the Construction and Operation of a Railroad in Nevada to a Geologic Repository at Yucca Mountain, Nye County, Nevada Floodplain Statement of Findings for the Final Environmental Impact Statement for a Rail Alignment for the Construction and Operation of a Railroad in Nevada to a Geologic Repository at Yucca Mountain, Nye County, Nevada Floodplain Statement of Findings for the Final Environmental

  3. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Findings of No Significant Impact (FONSI) Findings of No Significant Impact (FONSI) Findings of No Significant Impact are public documents issued by a Federal agency briefly presenting the reasons why an action for which the agency has prepared an environmental assessment will not have a significant effect on the human environment and, therefore, will not require preparation of an environmental impact statement. If you have any trouble finding a specific document, please contact

  4. Finding and Winning Simplified Acquisitions, Part 2 | Department of Energy

    Energy Savers [EERE]

    Finding and Winning Simplified Acquisitions, Part 2 Finding and Winning Simplified Acquisitions, Part 2 Presented at the 15th Annual DOE Small Business Forum & Expo by: Guy Timberlake, Chief Visionary Officer and Chief Executive Officer, The American Small Business Coalition Finding and Winning Simplified Acquisitions, Part 2 (6.47 MB) More Documents & Publications Finding and Winning Simplified Acquisitions, Part 1 December 12, 2013 Business Opportunity Session Presentations Acquisition

  5. Portsmouth Site Treatment Plan Director's Final Findings and Orders |

    Energy Savers [EERE]

    Department of Energy Treatment Plan Director's Final Findings and Orders Portsmouth Site Treatment Plan Director's Final Findings and Orders Portsmouth Site Treatment Plan Director's Final Findings and Orders is an agreement between the Ohio EPA and DOE approving the Site Treatment Plan and setting forth guidelines for storage and treatment of mixed wastes at the Portsmouth Facility. Portsmouth Site Treatment Plan Director's Final Findings and Order - 1995 (3.65 MB) More Documents &

  6. Modeling particle deposition on HVAC heat exchangers

    SciTech Connect (OSTI)

    Siegel, J.A.; Nazaroff, W.W.

    2002-01-01

    Fouling of fin-and-tube heat exchangers by particle deposition leads to diminished effectiveness in supplying ventilation and air conditioning. This paper explores mechanisms that cause particle deposition on heat exchanger surfaces. We present a model that accounts for impaction, diffusion, gravitational settling, and turbulence. Simulation results suggest that some submicron particles deposit in the heat exchanger core, but do not cause significant performance impacts. Particles between 1 and 10 {micro}m deposit with probabilities ranging from 1-20% with fin edge impaction representing the dominant mechanism. Particles larger than 10 {micro}m deposit by impaction on refrigerant tubes, gravitational settling on fin corrugations, and mechanisms associated with turbulent airflow. The model results agree reasonably well with experimental data, but the deposition of larger particles at high velocities is underpredicted. Geometric factors, such as discontinuities in the fins, are hypothesized to be responsible for the discrepancy.

  7. Composite of coated magnetic alloy particle

    DOE Patents [OSTI]

    Moorhead, Arthur J.; Kim, Hyoun-Ee

    2000-01-01

    A composite structure and method for manufacturing same, the composite structure being comprised of metal particles and an inorganic bonding media. The method comprises the steps of coating particles of a metal powder with a thin layer of an inorganic bonding media selected from the group of powders consisting of a ceramic, glass, and glass-ceramic. The particles are assembled in a cavity and heat, with or without the addition of pressure, is thereafter applied to the particles until the layer of inorganic bonding media forms a strong bond with the particles and with the layer of inorganic bonding media on adjacent particles. The resulting composite structure is strong and remains cohesive at high temperatures.

  8. Particle growth in silane-hydrogen discharges

    SciTech Connect (OSTI)

    Kujundzic, Damir; Gallagher, Alan

    2006-02-01

    The growth of silicon particles has been measured in silane-hydrogen radio-frequency (rf) discharges using a typical hydrogen/silane dilution ratio (20) and the pressure range (1.2-2.2 Torr) used for the production of amorphous and microcrystalline silicon films and devices. By operating brief discharges without gas flow, the particle size is obtained from the afterglow diffusion and the particle density from the scattered-light intensity. These small-reactor data thus provide the expected particle size and density versus location-in a commercial large-area-isothermal-flowing-gas reactor. Particle growth rate is a strong function of pressure, whereas film growth rate is almost independent of pressure. Both growth rates are sensitive to rf voltage, although particle growth is more sensitive.

  9. Electrostatic particle trap for ion beam sputter deposition ...

    Office of Scientific and Technical Information (OSTI)

    The electrostatic particle trap consists of an array of electrode surfaces, each ... particle; trap; consists; array; electrode; surfaces; maintained; electrostatic; ...

  10. Application of channeling in bent crystals to charged particle...

    Office of Scientific and Technical Information (OSTI)

    Language: English Subject: 43 PARTICLE ACCELERATORS; BEAM OPTICS; CHANNELING; ATTENUATION; ... BEAMS 430200* -- Particle Accelerators-- Beam Dynamics, Field Calculations, & Ion Optics

  11. Particle accelerator employing transient space charge potentials

    DOE Patents [OSTI]

    Post, Richard F.

    1990-01-01

    The invention provides an accelerator for ions and charged particles. The plasma is generated and confined in a magnetic mirror field. The electrons of the plasma are heated to high temperatures. A series of local coils are placed along the axis of the magnetic mirror field. As an ion or particle beam is directed along the axis in sequence the coils are rapidly pulsed creating a space charge to accelerate and focus the beam of ions or charged particles.

  12. Alpha particles in effective field theory

    SciTech Connect (OSTI)

    Caniu, C.

    2014-11-11

    Using an effective field theory for alpha (?) particles at non-relativistic energies, we calculate the strong scattering amplitude modified by Coulomb corrections for a system of two ?s. For the strong interaction, we consider a momentum-dependent interaction which, in contrast to an energy dependent interaction alone [1], could be more useful in extending the theory to systems with more than two ? particles. We will present preliminary results of our EFT calculations for systems with two alpha particles.

  13. Resistance probe for energetic particle dosimetry

    DOE Patents [OSTI]

    Wampler, W.R.

    A probe for determining the energy and flux of particles in a plasma comprises a carbon film adapted to be exposed to the plasma, the film having an electrical resistance which is related to the number of particles impacting the film, contacts for passing an electrical current throught the film, and contacts for determining the electrical resistance of the film. An improved method for determining the energy or flux of particles in a plasma is also disclosed.

  14. Flash evaporation of liquid monomer particle mixture

    DOE Patents [OSTI]

    Affinito, John D.; Darab, John G.; Gross, Mark E.

    1999-01-01

    The present invention is a method of making a first solid composite polymer layer. The method has the steps of (a) mixing a liquid monomer with particles substantially insoluble in the liquid monomer forming a monomer particle mixture; (b) flash evaporating the particle mixture and forming a composite vapor; and (c) continuously cryocondensing said composite vapor on a cool substrate and cross-linking the cryocondensed film thereby forming the polymer layer.

  15. Conformal Electromagnetic Particle in Cell: A Review

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Meierbachtol, Collin S.; Greenwood, Andrew D.; Verboncoeur, John P.; Shanker, Balasubramaniam

    2015-10-26

    We review conformal (or body-fitted) electromagnetic particle-in-cell (EM-PIC) numerical solution schemes. Included is a chronological history of relevant particle physics algorithms often employed in these conformal simulations. We also provide brief mathematical descriptions of particle-tracking algorithms and current weighting schemes, along with a brief summary of major time-dependent electromagnetic solution methods. Several research areas are also highlighted for recommended future development of new conformal EM-PIC methods.

  16. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how much power a battery can deliver. Despite the technological innovations

  17. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how much power a battery can deliver. Despite the technological innovations

  18. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how much power a battery can deliver. Despite the technological innovations

  19. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how much power a battery can deliver. Despite the technological innovations

  20. PREPARATION OF SPHERICAL URANIUM DIOXIDE PARTICLES

    DOE Patents [OSTI]

    Levey, R.P. Jr.; Smith, A.E.

    1963-04-30

    This patent relates to the preparation of high-density, spherical UO/sub 2/ particles 80 to 150 microns in diameter. Sinterable UO/sub 2/ powder is wetted with 3 to 5 weight per cent water and tumbled for at least 48 hours. The resulting spherical particles are then sintered. The sintered particles are useful in dispersion-type fuel elements for nuclear reactors. (AEC)

  1. Resistance probe for energetic particle dosimetry

    DOE Patents [OSTI]

    Wampler, William R.

    1988-01-01

    A probe for determining the energy and flux of particles in a plasma comprises a carbon film adapted to be exposed to the plasma, the film havinmg an electrical resistance which is related to the number of particles impacting the film, contacts for passing an electrical current through the film, and contacts for determining the electrical resistance of the film. An improved method for determining the energy or flux of particles in a plasma is also disclosed.

  2. Fermilab | Science | Particle Accelerators | Leading Accelerator Technology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Leading Accelerator Technology photo From blueprint to construction, Fermilab scientists and engineers develop particle accelerators to produce beams to take particle physics to the next level, collaborating with scientists and laboratories around the world to help build these complex machines. Researchers build accelerators to be efficient and robust along every step of the particle beam's path, from the time it's born to its termination on target. The machines themselves must be efficient,

  3. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone consists of trillions of particles. When a lithium-ion battery is charged or discharged lithium ions move from one electrode to another, filling and unfilling individual, variably-sized battery particles. The rates of these processes determine how much power a battery can deliver. Despite the technological innovations

  4. MASS SEPARATION OF HIGH ENERGY PARTICLES

    DOE Patents [OSTI]

    Marshall, L.

    1962-09-25

    An apparatus and method are described for separating charged, high energy particles of equal momentum forming a beam where the particles differ slightly in masses. Magnetic lenses are utilized to focus the beam and maintain that condition while electrostatic fields located between magnetic lenses are utilized to cause transverse separation of the particles into two beams separated by a sufficient amount to permit an aperture to block one beam. (AEC)

  5. Flash evaporation of liquid monomer particle mixture

    DOE Patents [OSTI]

    Affinito, J.D.; Darab, J.G.; Gross, M.E.

    1999-05-11

    The present invention is a method of making a first solid composite polymer layer. The method has the steps of (a) mixing a liquid monomer with particles substantially insoluble in the liquid monomer forming a monomer particle mixture; (b) flash evaporating the particle mixture and forming a composite vapor; and (c) continuously cryocondensing said composite vapor on a cool substrate and cross-linking the cryocondensed film thereby forming the polymer layer. 3 figs.

  6. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    First Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many potential applications in medicine, environmental

  7. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone...

  8. Dielectrophoretic concentration of particles under electrokinetic flow

    DOE Patents [OSTI]

    Miles, Robin R.; Bettencourt, Kerry A.; Fuller, Christopher K.

    2004-09-07

    The use of dielectrophoresis to collect particles under the conditions of electrokinetically-driven flow. Dielectrophortic concentration of particles under electrokinetic flow is accomplished by interdigitated electrodes patterned on an inner surface of a microfluid channel, a DC voltage is applied across the ends to the channel, and an AC voltage is applied across the electrodes, and particles swept down the channel electrokinetically are trapped within the field established by the electrodes. The particles can be released when the voltage to the electrodes is released.

  9. Particle Number & Particulate Mass Emissions Measurements on...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Heavy-duty Engine using the PMP Methodologies Particle Number & Particulate Mass Emissions Measurements on a 'Euro VI' Heavy-duty Engine using the PMP Methodologies Poster ...

  10. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many potential applications in medicine, environmental science, and

  11. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    First Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many potential applications in medicine, environmental

  12. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many potential applications in medicine, environmental science, and

  13. First Direct Imaging of Swollen Microgel Particles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Direct Imaging of Swollen Microgel Particles Print Microgels are soft-material particles consisting of cross-linked polymer networks, 100 nm to 1 ÎŒm in diameter, dispersed in a continuous medium such as water. A useful feature of certain types of microgel particles is that they can swell or shrink with changes in external triggers such as pH and temperature. Thus microgel particles can act like "nanosponges" and offer many potential applications in medicine, environmental science, and

  14. Experimental Survey of Strange Particle Decays

    DOE R&D Accomplishments [OSTI]

    Steinberger, J.

    1964-06-01

    It is the aim of these three lectures to summarize the present experimental knowledge concerning the decays of the strange particles.

  15. Mapping Particle Charges in Battery Electrodes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Particle Charges in Battery Electrodes Print The deceivingly simple appearance of batteries masks their chemical complexity. A typical lithium-ion battery in a cell phone ...

  16. Astronomy Particle Physics Light Sources Genomics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1 - 2 Astronomy Particle Physics Light Sources Genomics Climate * Big Data Software - Broad ecosystem of capabilities and technologies - Research and evaluate - Customize and...

  17. Biosensors based on directed assembly of particles

    DOE Patents [OSTI]

    Lu, Yi; Liu, Juewen

    2009-02-03

    A sensor system for detecting an effector or cofactor comprises (a) a nucleic acid enzyme; (b) a substrate for the nucleic acid enzyme, comprising a first polynucleotide; (c) a first set of particles comprising a second polynucleotide at least partially complementary to the substrate, where the polynucleotide is attached to the particles at its 3' terminus; and (d) a second set of particles comprising a third polynucleotide at least partially complementary to the substrate, where the polynucleotide is attached to the particles at its 5' terminus.

  18. Particle beam generator using a radioactive source

    DOE Patents [OSTI]

    Underwood, D.G.

    1993-03-30

    The apparatus of the present invention selects from particles emitted by a radioactive source those particles having momentum within a desired range and focuses the selected particles in a beam having at least one narrow cross-dimension, and at the same time attenuates potentially disruptive gamma rays and low energy particles. Two major components of the present invention are an achromatic bending and focusing system, which includes sector magnets and quadrupole, and a quadrupole doublet final focus system. Permanent magnets utilized in the apparatus are constructed of a ceramic (ferrite) material which is inexpensive and easily machined.

  19. Particle beam generator using a radioactive source

    DOE Patents [OSTI]

    Underwood, David G.

    1993-01-01

    The apparatus of the present invention selects from particles emitted by a radioactive source those particles having momentum within a desired range and focuses the selected particles in a beam having at least one narrow cross-dimension, and at the same time attenuates potentially disruptive gamma rays and low energy particles. Two major components of the present invention are an achromatic bending and focusing system, which includes sector magnets and quadrupole, and a quadrupole doublet final focus system. Permanent magnets utilized in the apparatus are constructed of a ceramic (ferrite) material which is inexpensive and easily machined.

  20. PARTICLE ACCELERATORS; ACCELERATORS; BEAM DUMPS; BENDING; CHANNELING...

    Office of Scientific and Technical Information (OSTI)

    Channeling through Bent Crystals Mack, Stephanie; Ottawa U. SLAC 43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DUMPS; BENDING; CHANNELING; CRYSTAL LATTICES; DETECTION; FORTRAN;...

  1. System for particle concentration and detection

    DOE Patents [OSTI]

    Morales, Alfredo M.; Whaley, Josh A.; Zimmerman, Mark D.; Renzi, Ronald F.; Tran, Huu M.; Maurer, Scott M.; Munslow, William D.

    2013-03-19

    A new microfluidic system comprising an automated prototype insulator-based dielectrophoresis (iDEP) triggering microfluidic device for pathogen monitoring that can eventually be run outside the laboratory in a real world environment has been used to demonstrate the feasibility of automated trapping and detection of particles. The system broadly comprised an aerosol collector for collecting air-borne particles, an iDEP chip within which to temporarily trap the collected particles and a laser and fluorescence detector with which to induce a fluorescence signal and detect a change in that signal as particles are trapped within the iDEP chip.

  2. Single particle imaging: opportunities and challenges | Stanford...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Single particle imaging: opportunities and challenges Thursday, December 17, 2015 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Speaker: Ivan Vartaniants, DESY Program...

  3. INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; RADIATION

    Office of Scientific and Technical Information (OSTI)

    interval technical basis document Chiaro, P.J. Jr. 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; RADIATION DETECTORS; RADIATION MONITORS; DOSEMETERS;...

  4. EXTRACTOR FOR HIGH ENERGY CHARGED PARTICLES

    DOE Patents [OSTI]

    Lambertson, G.R.

    1964-04-01

    A particle-extracting apparatus for use with a beam of high-energy charged particles such as travel in an evacuated chamber along a circular equilibrium axis is described. A magnetized target is impacted relatively against the beam whereby the beam particles are deflected from the beam by the magnetic induction in the target. To this end the target may be moved into the beam or the beam may coast into the target and achieve high angular particle deflection and slow extraction. A deflecting septum magnet may additionally be used for deflection at even sharper angles. (AEC)

  5. Statistics of particle time-temperature histories.

    SciTech Connect (OSTI)

    Hewson, John C.; Lignell, David O.; Sun, Guangyuan

    2014-10-01

    Particles in non - isothermal turbulent flow are subject to a stochastic environment tha t produces a distribution of particle time - temperature histories. This distribution is a function of the dispersion of the non - isothermal (continuous) gas phase and the distribution of particles relative to that gas phase. In this work we extend the one - dimensional turbulence (ODT) model to predict the joint dispersion of a dispersed particle phase and a continuous phase. The ODT model predicts the turbulent evolution of continuous scalar fields with a model for the cascade of fluctuations to smaller sc ales (the 'triplet map') at a rate that is a function of the fully resolved one - dimens ional velocity field . Stochastic triplet maps also drive Lagrangian particle dispersion with finite Stokes number s including inertial and eddy trajectory - crossing effect s included. Two distinct approaches to this coupling between triplet maps and particle dispersion are developed and implemented along with a hybrid approach. An 'instantaneous' particle displacement model matches the tracer particle limit and provide s an accurate description of particle dispersion. A 'continuous' particle displacement m odel translates triplet maps into a continuous velocity field to which particles respond. Particles can alter the turbulence, and modifications to the stochastic rate expr ession are developed for two - way coupling between particles and the continuous phase. Each aspect of model development is evaluated in canonical flows (homogeneous turbulence, free - shear flows and wall - bounded flows) for which quality measurements are ava ilable. ODT simulations of non - isothermal flows provide statistics for particle heating. These simulations show the significance of accurately predicting the joint statistics of particle and fluid dispersion . Inhomogeneous turbulence coupled with the in fluence of the mean flow fields on particles of varying properties alter s particle dispersion. The

  6. Method of producing non-agglomerating submicron size particles

    DOE Patents [OSTI]

    Bourne, Roy S.; Eichman, Clarence C.; Welbon, William W.

    1989-01-01

    Submicron size particles are produced by using a sputtering process to deposit particles into a liquid. The liquid is processed to recover the particles therefrom, and the particles have sizes in the range of twenty to two hundred Angstroms. Either metallic or non-metallic particles can be produced, and the metallic particles can be used in "metallic inks".

  7. Method of producing submicron size particles and product produced thereby

    DOE Patents [OSTI]

    Bourne, R.S.; Eichman, C.C.; Welbon, W.W.

    1988-05-11

    Submicron size particles are produced by using a sputtering process to deposit particles into a liquid. The liquid is processed to recover the particles therefrom, and the particles have sizes in the range of twenty to two hundred Angstroms. Either metallic or non-metallic particles can be produced, and the metallic particles can be used in ''metallic inks.'' 4 figs.

  8. Model-independent analyses of dark-matter particle interactions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Anand, Nikhil; Fitzpatrick, A. Liam; Haxton, W. C.

    2015-03-24

    A model-independent treatment of dark-matter particle elastic scattering has been developed, yielding the most general interaction for WIMP-nucleon low-energy scattering, and the resulting amplitude has been embedded into the nucleus, taking into account the selection rules imposed by parity and time-reversal. One finds that, in contrast to the usual spin-independent/spin-dependent (SI/SD) formulation, the resulting cross section contains six independent nuclear response functions, three of which are associated with possible velocity-dependent interactions. We find that current experiments are four orders of magnitude more sensitive to derivative couplings than is apparent in the standard SI/SD treatment, which necessarily associated such interactions withmore » cross sections proportional to v2T ~ 10⁻⁶, where vT is the WIMP velocity relative to the center of mass of the nuclear target.« less

  9. Flux enhancement of slow-moving particles by Sun or Jupiter: Can they be detected on Earth?

    SciTech Connect (OSTI)

    Patla, Bijunath R.; Nemiroff, Robert J.; Hoffmann, Dieter H. H.; Zioutas, Konstantin

    2014-01-10

    Slow-moving particles capable of interacting solely with gravity might be detected on Earth as a result of the gravitational lensing induced focusing action of the Sun. The deflection experienced by these particles is inversely proportional to the square of their velocities, and as a result their focal lengths will be shorter. We investigate the velocity dispersion of these slow-moving particles, originating from distant point-like sources, for imposing upper and lower bounds on the velocities of such particles in order for them to be focused onto Earth. Stars, distant galaxies, and cluster of galaxies, etc., may all be considered as point-like sources. We find that fluxes of such slow-moving and non-interacting particles must have speeds between ?0.01 and .14 times the speed of light, c. Particles with speeds less than ?0.01c will undergo way too much deflection to be focused, although such individual particles could be detected. At the caustics, the magnification factor could be as high as ?10{sup 6}. We impose lensing constraints on the mass of these particles in order for them to be detected with large flux enhancements that are greater than 10{sup –9} eV. An approximate mass density profile for Jupiter is used to constrain particle velocities for lensing by Jupiter. We show that Jupiter could potentially focus particles with speeds as low as ?0.001c, which the Sun cannot.

  10. Preparation and characterization of palladium particles

    SciTech Connect (OSTI)

    Silver, G.L.; Leahy, B.T.; Martin, F.S.

    1989-02-15

    Palladium particles were prepared by burning palladium loaded ion exchange resins and reducing the combustion products with hydrogen gas. The particles can be compressed into pellets. Properties of the pellets, such as resistance to the flow of hydrogen gas and rate of exchange with deuterium, have been measured. 2 refs., 16 figs., 17 tabs.

  11. Aerodynamic beam generator for large particles

    DOE Patents [OSTI]

    Brockmann, John E. (Albuquerque, NM); Torczynski, John R. (Albuquerque, NM); Dykhuizen, Ronald C. (Albuquerque, NM); Neiser, Richard A. (Albuquerque, NM); Smith, Mark F. (Albuquerque, NM)

    2002-01-01

    A new type of aerodynamic particle beam generator is disclosed. This generator produces a tightly focused beam of large material particles at velocities ranging from a few feet per second to supersonic speeds, depending on the exact configuration and operating conditions. Such generators are of particular interest for use in additive fabrication techniques.

  12. Heavy particle production at the SSC

    SciTech Connect (OSTI)

    Brodsky, S.J.; Haber, H.E.; Gunion, J.F.

    1984-03-01

    Predictions for the production of heavy quarks, supersymmetric particles, and other colored systems at high energy due to intrinsic twist-six components in the proton wavefunction are given. We also suggest the possibility of using asymmetric collision energies (e.g., via intersecting rings at the SSC) in order to facilitate the study of forward and diffractive particle production processes. 9 references.

  13. Particle beam and crabbing and deflecting structure

    DOE Patents [OSTI]

    Delayen, Jean

    2011-02-08

    A new type of structure for the deflection and crabbing of particle bunches in particle accelerators comprising a number of parallel transverse electromagnetic (TEM)-resonant) lines operating in opposite phase from each other. Such a structure is significantly more compact than conventional crabbing cavities operating the transverse magnetic TM mode, thus allowing low frequency designs.

  14. Electromicroinjection of particles into living cells

    DOE Patents [OSTI]

    Ray, F. Andrew; Cram, L. Scott; Galey, William R.

    1988-01-01

    Method and apparatus for introducing particles into living cells. Fluorescently-stained human chromosomes are introduced into cultured, mitotic Chinese hamster cells using electromicroinjection. The recipient cells frequently survived the physiological perturbation imposed by a successful chromosome injection. Successfully injected recipient cells maintained viability as evidenced by their ability to be expanded. The technique relies on the surface charge of fluorescently stained chromosomes and their ability to be attracted and repelled to and from the tip of a micropipette. The apparatus includes a micropipette having a tip suitable for piercing the membrane of a target cell and an electrode inserted into the lumen thereof. The target cells and suspended particles are located in an electrically conducted solution, and the lumen of the micropipette is filled with an electrically conducting solution which contacts the electrode located therein. A second electrode is also located in the conducting solution containing the target cells and particles. Voltages applied to the electrode within the micropipette attract the particles to the region of the tip thereof. The particles adhere to the surface of the micropipette with sufficient force that insertion of the micropipette tip and attached particle through the membrane of a target cell will not dislodge the particle. By applying a voltage having the opposite polarity of the attraction voltage, the particles are expelled from the micropipette to which is then withdrawn from the cell body.

  15. Nanostructure of Metallic Particles in Light Water Reactor Used Nuclear Fuel

    SciTech Connect (OSTI)

    Buck, Edgar C.; Mausolf, Edward J.; Mcnamara, Bruce K.; Soderquist, Chuck Z.; Schwantes, Jon M.

    2015-03-11

    The extraordinary nano-structure of metallic particles in light water reactor fuels points to possible high reactivity through increased surface area and a high concentration of high energy defect sites. We have analyzed the metallic epsilon particles from a high burn-up fuel from a boiling water reactor using transmission electron microscopy and have observed a much finer nanostructure in these particles than has been reported previously. The individual round particles that varying in size between ~20 and ~50 nm appear to consist of individual crystallites on the order of 2-3 nm in diameter. It is likely that in-reactor irradiation induce displacement cascades results in the formation of the nano-structure. The composition of these metallic phases is variable yet the structure of the material is consistent with the hexagonal close packed structure of epsilon-ruthenium. These findings suggest that unusual catalytic behavior of these materials might be expected, particularly under accident conditions.

  16. Utilizing fly ash particles to produce low-cost metal matrix composites

    SciTech Connect (OSTI)

    Withers, G.

    2008-07-01

    Metal matrix composites (MMCs) are a blend of fine ceramic particles mixed with metals such as aluminium or magnesium. Fly ash is considerably cheaper than ceramics; aluminium-fly ash composites cost less than 60% of conventional aluminium-SiC composites making them attractive to automakers striving for lower weight and cheaper materials for brake rotors or brake drums. Ultalite.com has consulted with US researchers to to find the optimum requirements of the fly ash needed to make MMCs. Particle size 20-40 microns, low calcium oxide content and spherical particles were identified. The desired particles once extracted are stirred into molten aluminum and the resulting composite is into ingots for shipment to a casting facility. Dynamometer testing has shown that aluminium-fly ash composite brake drums have better performance and wear than cast iron drums. 6 figs., 1 tab.

  17. Assessment of Drag Models for Geldart A Particles in Bubbling Fluidized Beds

    SciTech Connect (OSTI)

    Estejab, Bahareh; Battaglia, Francine

    2015-10-08

    In order to accurately predict the hydrodynamic behavior of gas and solid phases using an Eulerian–Eulerian approach, it is crucial to use appropriate drag models to capture the correct physics. In this study, the performance of seven drag models for fluidization of Geldart A particles of coal, poplar wood, and their mixtures was assessed. In spite of the previous findings that bode badly for using predominately Geldart B drag models for fine particles, the results of our study revealed that if static regions of mass in the fluidized beds are considered, these drag models work well with Geldart A particles. It was found that drag models derived from empirical relationships adopt better with Geldart A particles compared to drag models that were numerically developed. Overall, the Huilin–Gidaspow drag model showed the best performance for both single solid phases and binary mixtures, however, for binary mixtures, Wen–Yu model predictions were also accurate.

  18. Real-time Shape-based Particle Separation and Detailed In-situ Particle Shape Characterization

    SciTech Connect (OSTI)

    Beranek, Josef; Imre, D.; Zelenyuk, Alla

    2012-02-07

    Particle shape is an important attribute that is very difficult to characterize. We present a new portable system that offers, for the first time, the opportunity to separate particles with different shapes and characterize their chemical and physical properties, including their dynamic shape factors (DSFs) in the transition and free-molecular regimes, with high precision, in-situ, and in real-time. The system uses a new generation aerosol particle mass analyzer (APM) to classify particles based on their masses and transport them to a differential mobility analyzer (DMA) that is used to select particles of one charge, one mass, and one shape. These highly uniform particles are ready for use and/or characterization by any application or analytical tool. We combine APM and DMA with our single particle mass spectrometer, SPLAT II, to form the ADS, and demonstrate its utility to measure in real-time individual particle compositions and vacuum aerodynamic diameters to yield, for each selected shape, particle DSFs in two flow regimes. We apply the ADS to characterize aspherical ammonium sulfate and NaCl particles and show that both particle types have wide distribution of particle shapes with DSFs from nearly 1 to 1.5.

  19. Electronically shielded solid state charged particle detector

    DOE Patents [OSTI]

    Balmer, D.K.; Haverty, T.W.; Nordin, C.W.; Tyree, W.H.

    1996-08-20

    An electronically shielded solid state charged particle detector system having enhanced radio frequency interference immunity includes a detector housing with a detector entrance opening for receiving the charged particles. A charged particle detector having an active surface is disposed within the housing. The active surface faces toward the detector entrance opening for providing electrical signals representative of the received charged particles when the received charged particles are applied to the active surface. A conductive layer is disposed upon the active surface. In a preferred embodiment, a nonconductive layer is disposed between the conductive layer and the active surface. The conductive layer is electrically coupled to the detector housing to provide a substantially continuous conductive electrical shield surrounding the active surface. The inner surface of the detector housing is supplemented with a radio frequency absorbing material such as ferrite. 1 fig.

  20. Electronically shielded solid state charged particle detector

    DOE Patents [OSTI]

    Balmer, David K.; Haverty, Thomas W.; Nordin, Carl W.; Tyree, William H.

    1996-08-20

    An electronically shielded solid state charged particle detector system having enhanced radio frequency interference immunity includes a detector housing with a detector entrance opening for receiving the charged particles. A charged particle detector having an active surface is disposed within the housing. The active surface faces toward the detector entrance opening for providing electrical signals representative of the received charged particles when the received charged particles are applied to the active surface. A conductive layer is disposed upon the active surface. In a preferred embodiment, a nonconductive layer is disposed between the conductive layer and the active surface. The conductive layer is electrically coupled to the detector housing to provide a substantially continuous conductive electrical shield surrounding the active surface. The inner surface of the detector housing is supplemented with a radio frequency absorbing material such as ferrite.

  1. Particle beam injector system and method

    DOE Patents [OSTI]

    Guethlein, Gary

    2013-06-18

    Methods and devices enable coupling of a charged particle beam to a radio frequency quadrupole accelerator. Coupling of the charged particle beam is accomplished, at least in-part, by relying on of sensitivity of the input phase space acceptance of the radio frequency quadrupole to the angle of the input charged particle beam. A first electric field across a beam deflector deflects the particle beam at an angle that is beyond the acceptance angle of the radio frequency quadrupole. By momentarily reversing or reducing the established electric field, a narrow portion of the charged particle beam is deflected at an angle within the acceptance angle of the radio frequency quadrupole. In another configuration, beam is directed at an angle within the acceptance angle of the radio frequency quadrupole by the first electric field and is deflected beyond the acceptance angle of the radio frequency quadrupole due to the second electric field.

  2. Alternative Fuels Data Center: Minnesota School District Finds Cost

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    Savings, Cold-Weather Reliability with Propane Buses Minnesota School District Finds Cost Savings, Cold-Weather Reliability with Propane Buses to someone by E-mail Share Alternative Fuels Data Center: Minnesota School District Finds Cost Savings, Cold-Weather Reliability with Propane Buses on Facebook Tweet about Alternative Fuels Data Center: Minnesota School District Finds Cost Savings, Cold-Weather Reliability with Propane Buses on Twitter Bookmark Alternative Fuels Data Center: Minnesota

  3. Commercial Building Energy Asset Score: Pilot Findings and Program Update |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Score: Pilot Findings and Program Update Commercial Building Energy Asset Score: Pilot Findings and Program Update The webinar was held on April 16, 2014, to share the findings from the 2013 Pilot and provide a program update on the Commercial Building Energy Asset Score. Presentation (1.74 MB) More Documents & Publications Commercial Building Energy Asset Rating HES Program Update and Scoring Tool v2014 Release Commercial Building Energy Asset Score: 2013 Pilot

  4. EA-2010: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-2010: Finding of No Significant Impact Alternating Gradient Synchrotron Complex Improvements at Brookhaven National Laboratory; Upton, New York DOE issued a Finding of No Significant Impact for the proposed activities at the Brookhaven National Laboratory Alternating Gradient Synchrotron Complex, including upgrading the Accelerator Test Facility to 10 GeV by adding laser acceleration, upgrading the Linac proton beam current, upgrading the facilities to produce

  5. EA-2022: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact EA-2022: Finding of No Significant Impact Western Area Power Administration adopted and approved a final EA, prepared by the Bureau of Reclamation with Western as a cooperating agency, that assesses the potential environmental impacts of a proposal to develop a 9.4 megawatt hydroelectric project at the existing Helena Valley Pumping Plant site at Canyon Ferry Dam on the Missouri River near Helena, Montana. Western issued a finding of no significant impact for the

  6. How to Find Ames Laboratory | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    How to Find Ames Laboratory Finding the Ames Laboratory The Ames Laboratory has it's main administrative offices in the Technical and Administrative Services Facility (TASF) building on the Iowa State University Campus. Technical and Administrative Services Facility (TASF) 2408 Pammel Drive, Ames, IA 50011-1015 For directions from the Des Moines Airport please use the link with the following directions: https://goo.gl/maps/c6SOK Finding the Ames Laboratory on the ISU Campus Image Click on the

  7. FOIA-Summary of Findings: Circumstances surrounding decisions regarding the

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    security clearance, access and work assignments | Department of Energy FOIA-Summary of Findings: Circumstances surrounding decisions regarding the security clearance, access and work assignments FOIA-Summary of Findings: Circumstances surrounding decisions regarding the security clearance, access and work assignments FOIA request FOIA-Summary of Findings: Circumstances surrounding decisions regarding the security clearance, access and work assignments (4.61 MB) More Documents &

  8. EA-1440: Finding of No Signficant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    : Finding of No Signficant Impact EA-1440: Finding of No Signficant Impact National Renewable Energy Laboratory's South Table Mountain Complex The Proposed Action is to operate the STM complex for alternative energy research with new and improved capabilities to support DOE"s mission to research, develop and transfer to industry renewable energy technologies. Finding of No Signficant Impact for the Site-Wide Environmental Assessment of the National Renewable Energy Laboratory's South Table

  9. EA-1406: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    06: Finding of No Significant Impact EA-1406: Finding of No Significant Impact Ground Water Compliance at the New Rifle, Colorado, UMTRA Project Site On the basis of the Environmental Assessment. which analyzed relevant environmental issues and addressed the concerns of stakeholders, DOE finds that no significant impact will result from implementing the planned action at the New Rifle site. This FONSI is documented pursuant to NEPA, the Council on Environmental Quality's "Regulations for

  10. Find Funding | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Find Funding Funding Opportunities Funding Opportunities Home Grants & Contracts Support Award Search / Public Abstracts Find Funding Early Career Research Program Statement on Digital Data Management Acknowledgements of Federal Support Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 Find Funding Print Text Size: A A A FeedbackShare Page Additional information on funding opportunities, including program

  11. Portsmouth Integration Director's Final Findings and Order | Department of

    Energy Savers [EERE]

    Energy Integration Director's Final Findings and Order Portsmouth Integration Director's Final Findings and Order Portsmouth Integration Director's Final Findings and Order purpose is to: integrate the on-site work required for specific units to avoid duplication of effort, and efficiently perform sitewide ground water monitoring and surveillance and maintenance activities; recognize that a substantial portion of the tasks required under existing approved closure plans for certain units have

  12. EA-1495: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    5: Finding of No Significant Impact EA-1495: Finding of No Significant Impact USEC Inc. American Centrifuge Lead Cascade Facility at Piketon, Ohio The purpose of NRC's proposed action is to authorize possession and use of source and special nuclear material at the Lead Cascade in Piketon, Ohio. Finding of No Significant Impact for the United States Enrichment Corporation Incorporated, American Centrifuge Lead Cascade Facility at Piketon, Ohio (369.61 KB) More Documents & Publications

  13. ENERGETIC PARTICLE CROSS-FIELD PROPAGATION EARLY IN A SOLAR EVENT

    SciTech Connect (OSTI)

    Laitinen, T.; Dalla, S.; Marsh, M. S.

    2013-08-20

    Solar energetic particles (SEPs) have been observed to easily spread across heliographic longitudes, and the mechanisms responsible for this behavior remain unclear. We use full-orbit simulations of a 10 MeV proton beam in a turbulent magnetic field to study to what extent the spread across the mean field can be described as diffusion early in a particle event. We compare the full-orbit code results to solutions of a Fokker-Planck equation including spatial and pitch angle diffusion, and of one including also propagation of the particles along random-walking magnetic field lines. We find that propagation of the particles along meandering field lines is the key process determining their cross-field spread at 1 AU at the beginning of the simulated event. The mean square displacement of the particles an hour after injection is an order of magnitude larger than that given by the diffusion model, indicating that models employing spatial cross-field diffusion cannot be used to describe early evolution of an SEP event. On the other hand, the diffusion of the particles from their initial field lines is negligible during the first 5 hr, which is consistent with the observations of SEP intensity dropouts. We conclude that modeling SEP events must take into account the particle propagation along meandering field lines for the first 20 hr of the event.

  14. EA-1193: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-1193: Finding of No Significant Impact Atmospheric Radiation Measurement (ARM) Program North Slope of Alaska and Adjacent Arctic Ocean Cloud and Radiation Testbed (CART) Site The ...

  15. PPPL physicists find clue to formation of magnetic fields around...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    results, in the range in which they are done, strongly suggest that such dynamo action is possible." These findings might lead to greater understanding of the behavior of...

  16. EA-1685: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of No Significant Impact EA-1685: Finding of No Significant Impact Experimental Coal Flow Program at Clemson University The Western Area Power Administration (Western) is the...

  17. CLASS DEVIATION FINDINGS AND DETERMINATION TO IMPLEMENT AN APPROPRIATI...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PROVISION RELATED TO INTERNAL CONFIDENTIALITY AGREEMENTS AND THE REPORTING OF FRAUD, WASTE, AND ABUSE Findings I. Section 743 of Division E, Title VII of the Consolidated...

  18. Finding of No Significant Impact, Federal Register, 73 FR 2017...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    73 FR 2017, January 11, 2008 Document details the finding of no significant impact of the Energy-Efficient Performance Requirements for New Federal Commercial and Residential...

  19. Main Page Main Page: Find energy information and data. Share...

    Open Energy Info (EERE)

    Main Page Main Page: Find energy information and data. Share knowledge. Connect with people. energy datasets energy community Main Page energy information open data 0...

  20. EA-1864: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Impact EA-1864: Finding of No Significant Impact Electrical District 5 - Palo Verde Hub Project The U.S. Department of Energy (DOE) Western Area Power Administration...

  1. EA-2024: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Energy, National Nuclear Security Administration (NNSA), issued this finding of no ... involved with the transportation of the plutonium are maintained within acceptable limits. ...

  2. Floodplain and Wetland Assessment and Statement of Findings

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Statement of Findings for Construction of a Second Full Service Access Road ... with the construction of a second full service access road to the NREL STM Site. ...

  3. EA-1719: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Impact EA-1719: Finding of No Significant Impact Novolyte Technologies, Inc. Electric Drive Vehicle Battery and Component Manufacturing Initiative Project, Zachary, Louisiana DOE...

  4. EA-0921: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-0921: Finding of No Significant Impact Ambulatory Research and Education Center, Oregon Health ... the meaning of NEPA. Therefore, an environmental impact statement is not required. ...

  5. Energy Department Report Finds Major Potential to Increase Clean...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Department Report Finds Major Potential to Increase Clean Hydroelectric ... to develop electric power generation at existing dams across the United States that aren't ...

  6. Oregon 401 Evaluation and Findings Checklist | Open Energy Information

    Open Energy Info (EERE)

    401 Evaluation and Findings Checklist Jump to: navigation, search OpenEI Reference LibraryAdd to library PermittingRegulatory Guidance - Checklist: Oregon 401 Evaluation and...

  7. EA-1797: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-1797: Finding of No Significant Impact Agua Caliente Solar Project in Yuma County, ... transmission line proposed by Agua Caliente Solar, LLC in Yuma County, Arizona. ...

  8. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Uranium July 1, 2009 EA-1645: Finding of No Significant Impact Loan Guarantee for Sage Electrochromics SageGlass High Volume Manufacturing Facility in Faribault, MN June 26,...

  9. Exploring Plasma Science Advances from Fusion Findings to Astrophysica...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Exploring Plasma Science Advances from Fusion Findings to Astrophysical Achievements By ... The latest advances in plasma physics were the focus of more than 1,000 scientists from ...

  10. EA-1762: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of No Significant Impact EA-1762: Finding of No Significant Impact Wellford Landfill Methane and Greenhouse Gas to Energy Project, Spartanburg County, South Carolina The...

  11. Rainbows and Leprechauns: Finding Gold in Partnerships (101)...

    Broader source: Energy.gov (indexed) [DOE]

    Peer Exchange Call Series: Rainbows and Leprechauns: Finding Gold in Partnerships (101), March 17, 2016, call slides and discussion summary. Call Slides and Discussion Summary ...

  12. EA-1837: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Finding of No Significant Impact Performance Verification Laboratory, Morgantown, West Virginia Based on the analyses in the environmental assessment, DOE determined that its...

  13. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of the Department of Energy, Waste Isolation Pilot Plant (WIPP) in Eddy County, New Mexico January 13, 2010 EA-1651: Finding of No Significant Impact U-233 Material...

  14. EA-1539: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Significant Impact EA-1539: Finding of No Significant Impact North Area Right-of-Way Maintenance, California Western Area Power Administration proposes to revise its operation and...

  15. Innovative Financing Solutions: Finding Money for Your Energy Efficiency Projects

    Broader source: Energy.gov [DOE]

    Provides an overview of how to find funding for your energy efficiency projects focusing on l-p agreements. Author: Energy Star

  16. EA-1974: Finding of No Significant Impact and Mitigation Action...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Bonneville Power Administration issued a finding of no significant impact (FONSI) for the proposed restoration of a tidal marsh in the Columbia River Estuary, near Astoria in ...

  17. EA-1696: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-1696: Finding of No Significant Impact Pantex Renewable Energy Project, Amarillo, Texas The NNSA has prepared an Environmental Assessment to analyze the potential...

  18. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Heating Facilities at the Savannah River Site, South Carolina June 11, 2008 EA-1613: Finding of No Significant Impact Proposed High Explosive Pressing Facility Pantex...

  19. Findings of No Significant Impact (FONSI) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of No Significant Impact Proposed Gas Main and Distribution System Upgrade, Pantex Plant, Amarillo, Texas August 26, 2005 EA-1542: Finding of No Significant Impact Burleigh County...

  20. Microsoft Word - Summary of RCA findings and lessons learned...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Work Planning and Scheduling System project Root cause analysis findings and lessons learned Summary BPA stopped the Work Planning and Scheduling System project in February 2012...

  1. EA-1384: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    The proposed action also involves the installation and operation of the Helios(High Energy Lithography Source) accelerator in the Free Electron Laser (FEL) addition. Finding of No ...

  2. EA-1499: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1499: Finding of No Significant Impact RadiologicalNuclear Countermeasures Test and Evaluation Complex, Nevada Test Site The National Nuclear Security Administration (NNSA) has ...

  3. Scientist finds new way to predict heat layer troublemaker |...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientist finds new way to predict heat layer troublemaker By John Greenwald August 27, ... But heat inevitably flows through the system and becomes separated, or scraped off, from ...

  4. DOE issues Finding of No Significant Impact for the Environmental...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    issues Finding of No Significant Impact for the Environmental Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory DOE issues ...

  5. Find Financing for Energy Efficiency Upgrades | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Efficiency Upgrades Find Financing for Energy Efficiency Upgrades Photo of a block in lower downtown Denver that is part of Living City Block, a DOE Commercial Building ...

  6. EA-1628: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Iowa. PDF icon Mitigation Action Plan for the Environmental Assessment, Notice of Wetlands Involvement and Finding of No Significant Impact for Construction and Operation of a...

  7. FOIA-Summary of Findings: Circumstances surrounding decisions...

    Broader source: Energy.gov (indexed) [DOE]

    FOIA request FOIA-Summary of Findings: Circumstances surrounding decisions regarding the security clearance, access and work assignments (4.61 MB) More Documents & Publications ...

  8. EA-1796: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    near Gillespie, Arizona, DOEEA-1796 (February 2011) More Documents & Publications EA-1796: Final Environmental Assessment EA-1796: Finding of No Significant Impact MESQUITE

  9. EA-1952: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ...energy.govnode607866. Download Document PDF icon EA-1952: Finding of No Significant Impact More Documents & Publications EA-1952: Draft Environmental Assessment EA-1952: Final

  10. EA-1931: Finding of No Significant Impact and Mitigation Action...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Bonneville Power Administration issued a finding of no significant impact and a ... More Documents & Publications EA-1931: Draft Environmental Assessment EA-1931: Final ...

  11. EA-1979: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    icon EA-1979-FONSI-2015.pdf More Documents & Publications EA-1979: Draft Environmental Assessment EA-1979: Final Environmental Assessment EA-1955: Finding of No Significant Impact

  12. EA-1700: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    LBNLUniversity of California Berkeley programs that focus on computational and computer science research in a new facility on the LBNL site. PDF icon Finding of No Significant...

  13. Finding Large Aperture Fractures in Geothermal Resource Areas...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ...-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic ...

  14. Findings of No Significant Impact (FONSI) | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Ridge Reservation for the biological control of the emerald ash borer, a nonnative invasive beetle. May 1, 2015 EA-1796: Finding of No Significant Impact Loan Guarantee to...

  15. EA-1747: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EA-1747: Finding of No Significant Impact Rocky Flats Surface Water Configuration, Jefferson County, Colorado Surface Water Configuration Project at the Rocky Flats Site, Colorado ...

  16. EA-1770: Finding of No Significant Impact | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    of the National Environmental Policy Act (NEPA). Finding of No Significant Impact Photovoltaic Solar Project at the Durango, Colorado, Disposal Site, La Plata County, DOEEA 1770...

  17. EA-1955: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Western Area Power Administration (Western) issued a finding of no significant impact for a proposal to interconnect, via a proposed new substation, a proposed Dakota Plains ...

  18. EA-1488: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1488: Finding of No Significant Impact U-233 Disposition, Medical Isotope Production, and Building 3019 Complex Shutdown at the Oak Ridge National Laboratory, Oak Ridge, ...

  19. EA-1929: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1929: Finding of No Significant Impact NorthStar Medical Technologies LLC, Commercial Domestic Production of the Medical Isotope Molybdenum-99 NNSA has completed the Final ...

  20. EA-1651: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1651: Final Environmental Assessment EA-1488: Finding of No Significant Impact EA-1488: Environmental Assessment for the U-233 Disposition, Medical Isotope Production, and ...