National Library of Energy BETA

Sample records for finding large aperture

  1. 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 ...

  2. Finding Large Aperture Fractures in Geothermal Resource Areas Using A

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis | Department of Energy Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Fining Large Aperture Fractures in Geothermal Resource Areas Using A

  3. Finding Large Aperture Fractures in Geothermal Resource Areas...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface ...

  4. Finding Large Aperture Fractures in Geothermal Resource Areas Using a

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Three-Component Long-Offset Surface Seismic Survey | Department of Energy a Three-Component Long-Offset Surface Seismic Survey Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey DOE Geothermal Peer Review 2010 - Presentation. Project summary: Drilling into large aperture open fractures (LAFs) typically yield production wells with high productivity and low pressure drawdown. Developing geophysical and geologic techniques

  5. Finding Large Aperture Fractures in Geothermal Resource Areas Using A

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis | Department of Energy A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis Fining Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic

  6. Finding Large Aperture Fractures in Geothermal Resource Areas...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    DOE Geothermal Peer Review 2010 - Presentation. Project summary: Drilling into large aperture open fractures (LAFs) typically yield production wells with high productivity and ...

  7. Finding Large Aperture Fractures in Geothermal Resource Areas...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Aperture Fractures (LAF's) * Budget: 679,000 - Phase 2: Drilling - January-December, 2011. * Task 4: Stepout drilling from existing production wells. * Milestone: Intersect and ...

  8. Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    FINDING LARGE APERTURE FRACTURES IN GEOTHERMAL RESOURCE AREAS USING A THREE-COMPONENT LONG- OFFSET SURFACE SEISMIC SURVEY, PSInSAR, AND KINEMATIC ANALYSIS Principal Investigator : William Teplow, US Geothermal, Inc. Presenter: Ian Warren, US Geothermal, Inc. INNOVATIVE EXPLORATION TECHNIQUES Project Officer: Ava Coy / Erik Swanton Total Project Funding: $3.77 Million April 2013 This presentation does not contain any proprietary confidential, or otherwise restricted information. 2 | US DOE

  9. Large aperture diffractive space telescope

    DOE Patents [OSTI]

    Hyde, Roderick A.

    2001-01-01

    A large (10's of meters) aperture space telescope including two separate spacecraft--an optical primary objective lens functioning as a magnifying glass and an optical secondary functioning as an eyepiece. The spacecraft are spaced up to several kilometers apart with the eyepiece directly behind the magnifying glass "aiming" at an intended target with their relative orientation determining the optical axis of the telescope and hence the targets being observed. The objective lens includes a very large-aperture, very-thin-membrane, diffractive lens, e.g., a Fresnel lens, which intercepts incoming light over its full aperture and focuses it towards the eyepiece. The eyepiece has a much smaller, meter-scale aperture and is designed to move along the focal surface of the objective lens, gathering up the incoming light and converting it to high quality images. The positions of the two space craft are controlled both to maintain a good optical focus and to point at desired targets which may be either earth bound or celestial.

  10. the Large Aperture GRB Observatory

    SciTech Connect (OSTI)

    Bertou, Xavier

    2009-04-30

    The Large Aperture GRB Observatory (LAGO) aims at the detection of high energy photons from Gamma Ray Bursts (GRB) using the single particle technique (SPT) in ground based water Cherenkov detectors (WCD). To reach a reasonable sensitivity, high altitude mountain sites have been selected in Mexico (Sierra Negra, 4550 m a.s.l.), Bolivia (Chacaltaya, 5300 m a.s.l.) and Venezuela (Merida, 4765 m a.s.l.). We report on the project progresses and the first operation at high altitude, search for bursts in 6 months of preliminary data, as well as search for signal at ground level when satellites report a burst.

  11. Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey, PSInSAR and Kinematic Structural Analysis

    SciTech Connect (OSTI)

    Teplow, William J.; Warren, Ian

    2015-08-12

    The DOE cost-share program applied innovative and cutting edge seismic surveying and processing, permanent scatter interferometry-synthetic aperture radar (PSInSAR) and structural kinematics to the exploration problem of locating and mapping largeaperture fractures (LAFs) for the purpose of targeting geothermal production wells. The San Emidio geothermal resource area, which is under lease to USG, contains production wells that have encountered and currently produce from LAFs in the southern half of the resource area (Figure 2). The USG lease block, incorporating the northern extension of the San Emidio geothermal resource, extends 3 miles north of the operating wellfield. The northern lease block was known to contain shallow thermal waters but was previously unexplored by deep drilling. Results of the Phase 1 exploration program are described in detail in the Phase 1 Final Report (Teplow et al., 2011). The DOE cost shared program was completed as planned on September 30, 2014. This report summarizes results from all of Phase 1 and 2 activities.

  12. Advances in optical materials for large aperture lasers

    SciTech Connect (OSTI)

    Stokowski, S.E.; Lowdermilk, W.H.; Marchi, F.T.; Swain, J.E.; Wallerstein, E.P.; Wirtenson, G.R.

    1981-12-15

    Lawrence Livermore National Laboratory (LLNL) is using large aperture Nd: glass lasers to investigate the feasibility of inertial confinement fusion. In our experiments high power laser light is focussed onto a small (100 to 500 micron) target containing a deuterium-tritium fuel mixture. During the short (1 to 5 ns) laser pulse the fuel is compressed and heated, resulting in fusion reactions. The generation and control of the powerful laser pulses for these experiments is a challenging scientific and engineering task, which requires the development of new optical materials, fabrication techniques, and coatings. LLNL with the considerable cooperation and support from the optical industry, where most of the research and development and almost all the manufacturing is done, has successfully applied several new developments in these areas.

  13. Finding Large Aperture Fractures in Geothermal Resource Areas...

    Open Energy Information (Open El) [EERE & EIA]

    depth (600-4000 feet) geothermal systems. This project is designed to test the methodology on known occurrences of LAF's and then apply the technology to expand an existing...

  14. LCLS X-ray mirror measurements using a large aperture visible light

    Office of Scientific and Technical Information (OSTI)

    interferometer (Conference) | SciTech Connect Conference: LCLS X-ray mirror measurements using a large aperture visible light interferometer Citation Details In-Document Search Title: LCLS X-ray mirror measurements using a large aperture visible light interferometer Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior

  15. Large-Pore Apertures in a Series of Metal-Organic Frameworks...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Terasaki, J. F. Stoddart, and O. M. Yaghi, Science 336 (6084), 1018 (2012) DOI: 10.1126science.1220131 Fig. 1 Abstract: We report a strategy to expand the pore aperture of...

  16. LUPUS I observations from the 2010 flight of the Balloon-borne large aperture submillimeter telescope for polarimetry

    SciTech Connect (OSTI)

    Matthews, Tristan G.; Chapman, Nicholas L.; Novak, Giles; Ade, Peter A. R.; Hargrave, Peter C.; Nutter, David; Angilè, Francesco E.; Devlin, Mark J.; Klein, Jeffrey; Benton, Steven J.; Fissel, Laura M.; Gandilo, Natalie N.; Netterfield, Calvin B.; Chapin, Edward L.; Fukui, Yasuo; Gundersen, Joshua O.; Korotkov, Andrei L.; Moncelsi, Lorenzo; Mroczkowski, Tony K.; Olmi, Luca; and others

    2014-04-01

    The Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol) was created by adding polarimetric capability to the BLAST experiment that was flown in 2003, 2005, and 2006. BLASTPol inherited BLAST's 1.8 m primary and its Herschel/SPIRE heritage focal plane that allows simultaneous observation at 250, 350, and 500 μm. We flew BLASTPol in 2010 and again in 2012. Both were long duration Antarctic flights. Here we present polarimetry of the nearby filamentary dark cloud Lupus I obtained during the 2010 flight. Despite limitations imposed by the effects of a damaged optical component, we were able to clearly detect submillimeter polarization on degree scales. We compare the resulting BLASTPol magnetic field map with a similar map made via optical polarimetry. (The optical data were published in 1998 by J. Rizzo and collaborators.) The two maps partially overlap and are reasonably consistent with one another. We compare these magnetic field maps to the orientations of filaments in Lupus I, and we find that the dominant filament in the cloud is approximately perpendicular to the large-scale field, while secondary filaments appear to run parallel to the magnetic fields in their vicinities. This is similar to what is observed in Serpens South via near-IR polarimetry, and consistent with what is seen in MHD simulations by F. Nakamura and Z. Li.

  17. Study of 2-in1 large-aperture Nb3Sn IR quadrupoles for the LHC luminosity upgrade

    SciTech Connect (OSTI)

    Kashikhin, V.V.; Zlobin, A.V.; /Fermilab

    2006-06-01

    Double-aperture Nb{sub 3}Sn quadrupoles with asymmetric coils and with cold and warm iron yokes were studied for the dipole-first upgrade scenario of the LHC Interaction Regions (IR). This paper describes the magnet design concepts and discusses their performance parameters, including field gradient and field quality limitations.

  18. Development and Testing of a Power Trough System Using a Structurally-Efficient, High-Performance, Large-Aperture Concentrator with Thin Glass Reflector and Focal Point Rotation

    SciTech Connect (OSTI)

    May, E. K.; Forristall, R.

    2005-11-01

    Industrial Solar Technology has assembled a team of experts to develop a large-aperture parabolic trough for the electric power market that moves beyond cost and operating limitations of 1980's designs based on sagged glass reflectors. IST's structurally efficient space frame design will require nearly 50% less material per square meter than a Solel LS-2 concentrator and the new trough will rotate around the focal point. This feature eliminates flexhoses that increase pump power, installation and maintenance costs. IST aims to deliver a concentrator module costing less than $100 per square meter that can produce temperatures up to 400 C. The IST concentrator is ideally suited for application of front surface film reflectors and ensures that US corporations will manufacture major components, except for the high temperature receivers.

  19. Aperture center energy showcase

    SciTech Connect (OSTI)

    Torres, J. J.

    2012-03-01

    Sandia and Forest City have established a Cooperative Research and Development Agreement (CRADA), and the partnership provides a unique opportunity to take technology research and development from demonstration to application in a sustainable community. A project under that CRADA, Aperture Center Energy Showcase, offers a means to develop exhibits and demonstrations that present feedback to community members, Sandia customers, and visitors. The technologies included in the showcase focus on renewable energy and its efficiency, and resilience. These technologies are generally scalable, and provide secure, efficient solutions to energy production, delivery, and usage. In addition to establishing an Energy Showcase, support offices and conference capabilities that facilitate research, collaboration, and demonstration were created. The Aperture Center project focuses on establishing a location that provides outreach, awareness, and demonstration of research findings, emerging technologies, and project developments to Sandia customers, visitors, and Mesa del Sol community members.

  20. 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 ...

  1. Study finds radioactivity around Los Alamos largely due to natural sources

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Radioactivity largely due to natural sources Study finds radioactivity around Los Alamos largely due to natural sources The study was subsequently peer reviewed externally by scientists at Colorado State University and internally within the Lab. December 10, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma

  2. Variable-aperture screen

    DOE Patents [OSTI]

    Savage, George M.

    1991-01-01

    Apparatus for separating material into first and second portions according to size including a plurality of shafts, a plurality of spaced disks radiating outwardly from each of the shafts to define apertures and linkage interconnecting the shafts for moving the shafts toward or away from one another to vary the size of the apertures while the apparatus is performing the separating function.

  3. Rotating Aperture System

    DOE Patents [OSTI]

    Rusnak, Brian; Hall, James M.; Shen, Stewart; Wood, Richard L.

    2005-01-18

    A rotating aperture system includes a low-pressure vacuum pumping stage with apertures for passage of a deuterium beam. A stator assembly includes holes for passage of the beam. The rotor assembly includes a shaft connected to a deuterium gas cell or a crossflow venturi that has a single aperture on each side that together align with holes every rotation. The rotating apertures are synchronized with the firing of the deuterium beam such that the beam fires through a clear aperture and passes into the Xe gas beam stop. Portions of the rotor are lapped into the stator to improve the sealing surfaces, to prevent rapid escape of the deuterium gas from the gas cell.

  4. Variable-aperture screen

    DOE Patents [OSTI]

    Savage, G.M.

    1991-10-29

    Apparatus is described for separating material into first and second portions according to size including a plurality of shafts, a plurality of spaced disks radiating outwardly from each of the shafts to define apertures and linkage interconnecting the shafts for moving the shafts toward or away from one another to vary the size of the apertures while the apparatus is performing the separating function. 10 figures.

  5. Shock wave absorber having apertured plate

    DOE Patents [OSTI]

    Shin, Yong W.; Wiedermann, Arne H.; Ockert, Carl E.

    1985-01-01

    The shock or energy absorber disclosed herein utilizes an apertured plate maintained under the normal level of liquid flowing in a piping system and disposed between the normal liquid flow path and a cavity pressurized with a compressible gas. The degree of openness (or porosity) of the plate is between 0.01 and 0.60. The energy level of a shock wave travelling down the piping system thus is dissipated by some of the liquid being jetted through the apertured plate toward the cavity. The cavity is large compared to the quantity of liquid jetted through the apertured plate, so there is little change in its volume. The porosity of the apertured plate influences the percentage of energy absorbed.

  6. Shock wave absorber having apertured plate

    DOE Patents [OSTI]

    Shin, Y.W.; Wiedermann, A.H.; Ockert, C.E.

    1983-08-26

    The shock or energy absorber disclosed herein utilizes an apertured plate maintained under the normal level of liquid flowing in a piping system and disposed between the normal liquid flow path and a cavity pressurized with a compressible gas. The degree of openness (or porosity) of the plate is between 0.01 and 0.60. The energy level of a shock wave travelling down the piping system thus is dissipated by some of the liquid being jetted through the apertured plate toward the cavity. The cavity is large compared to the quantity of liquid jetted through the apertured plate, so there is little change in its volume. The porosity of the apertured plate influences the percentage of energy absorbed.

  7. Confocal coded aperture imaging

    DOE Patents [OSTI]

    Tobin, Jr., Kenneth William (Harriman, TN); Thomas, Jr., Clarence E. (Knoxville, TN)

    2001-01-01

    A method for imaging a target volume comprises the steps of: radiating a small bandwidth of energy toward the target volume; focusing the small bandwidth of energy into a beam; moving the target volume through a plurality of positions within the focused beam; collecting a beam of energy scattered from the target volume with a non-diffractive confocal coded aperture; generating a shadow image of said aperture from every point source of radiation in the target volume; and, reconstructing the shadow image into a 3-dimensional image of the every point source by mathematically correlating the shadow image with a digital or analog version of the coded aperture. The method can comprise the step of collecting the beam of energy scattered from the target volume with a Fresnel zone plate.

  8. Apodizer aperture for lasers

    DOE Patents [OSTI]

    Jorna, Siebe; Siebert, Larry D.; Brueckner, Keith A.

    1976-11-09

    An aperture attenuator for use with high power lasers which includes glass windows shaped and assembled to form an annulus chamber which is filled with a dye solution. The annulus chamber is shaped such that the section in alignment with the axis of the incident beam follows a curve which is represented by the equation y = (r - r.sub.o).sup.n.

  9. Project Profile: Improved Large Aperture Collector Manufacturing...

    Energy.gov (indexed) [DOE]

    costs, resulting in a savings of 30m2. Publications, Patents, and Awards Final Report Learn about other DOE competitive awards for concentrating solar power research that ...

  10. Final Report - Improved Large Aperture Collector Manufacturing...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Solar Thermal Electric (STE) power generation is facing significant challenges from other sources of renewable energy; their advances have made it more and more difficult for solar ...

  11. Final Report- Improved Large Aperture Collector Manufacturing

    Energy.gov [DOE]

    Solar Thermal Electric (STE) power generation is facing significant challenges from other sources of renewable energy; their advances have made it more and more difficult for solar thermal to remain a cost effective alternative in the United States. The primary advantage of STE is the thermal storage capability, which allows plants to continue producing electricity long after the sun has set. While it is necessary for the industry to fully develop this storage technology, it is also critical that significant cost reductions are found in the solar field construction and installation. If STE is to be competitive, these cost reductions must be recognized not only in the design and manufacture of the collectors, but also in the assembly and installation of the solar field. The goal of this project was to evaluate the current state of the art parabolic trough collector field and develop an improved field that can be installed for

  12. Differential Optical Synthetic Aperture Radar

    DOE Patents [OSTI]

    Stappaerts, Eddy A. (San Ramon, CA)

    2005-04-12

    A new differential technique for forming optical images using a synthetic aperture is introduced. This differential technique utilizes a single aperture to obtain unique (N) phases that can be processed to produce a synthetic aperture image at points along a trajectory. This is accomplished by dividing the aperture into two equal "subapertures", each having a width that is less than the actual aperture, along the direction of flight. As the platform flies along a given trajectory, a source illuminates objects and the two subapertures are configured to collect return signals. The techniques of the invention is designed to cancel common-mode errors, trajectory deviations from a straight line, and laser phase noise to provide the set of resultant (N) phases that can produce an image having a spatial resolution corresponding to a synthetic aperture.

  13. Coded Aperture Imaging for Fluorescent X-rays-Biomedical Applications

    SciTech Connect (OSTI)

    Haboub, Abdel; MacDowell, Alastair; Marchesini, Stefano; Parkinson, Dilworth

    2013-06-01

    Employing a coded aperture pattern in front of a charge couple device pixilated detector (CCD) allows for imaging of fluorescent x-rays (6-25KeV) being emitted from samples irradiated with x-rays. Coded apertures encode the angular direction of x-rays and allow for a large Numerical Aperture x- ray imaging system. The algorithm to develop the self-supported coded aperture pattern of the Non Two Holes Touching (NTHT) pattern was developed. The algorithms to reconstruct the x-ray image from the encoded pattern recorded were developed by means of modeling and confirmed by experiments. Samples were irradiated by monochromatic synchrotron x-ray radiation, and fluorescent x-rays from several different test metal samples were imaged through the newly developed coded aperture imaging system. By choice of the exciting energy the different metals were speciated.

  14. The LASS (Larger Aperture Superconducting Solenoid) spectrometer

    SciTech Connect (OSTI)

    Aston, D.; Awaji, N.; Barnett, B.; Bienz, T.; Bierce, R.; Bird, F.; Bird, L.; Blockus, D.; Carnegie, R.K.; Chien, C.Y.

    1986-04-01

    LASS is the acronym for the Large Aperture Superconducting Solenoid spectrometer which is located in an rf-separated hadron beam at the Stanford Linear Accelerator Center. This spectrometer was constructed in order to perform high statistics studies of multiparticle final states produced in hadron reactions. Such reactions are frequently characterized by events having complicated topologies and/or relatively high particle multiplicity. Their detailed study requires a spectrometer which can provide good resolution in momentum and position over almost the entire solid angle subtended by the production point. In addition, good final state particle identification must be available so that separation of the many kinematically-overlapping final states can be achieved. Precise analyses of the individual reaction channels require high statistics, so that the spectrometer must be capable of high data-taking rates in order that such samples can be acquired in a reasonable running time. Finally, the spectrometer must be complemented by a sophisticated off-line analysis package which efficiently finds tracks, recognizes and fits event topologies and correctly associates the available particle identification information. This, together with complicated programs which perform specific analysis tasks such as partial wave analysis, requires a great deal of software effort allied to a very large computing capacity. This paper describes the construction and performance of the LASS spectrometer, which is an attempt to realize the features just discussed. The configuration of the spectrometer corresponds to the data-taking on K and K interactions in hydrogen at 11 GeV/c which took place in 1981 and 1982. This constitutes a major upgrade of the configuration used to acquire lower statistics data on 11 GeV/c K p interactions during 1977 and 1978, which is also described briefly.

  15. Sparse aperture endoscope

    DOE Patents [OSTI]

    Fitch, Joseph P.

    1999-07-06

    An endoscope which reduces the volume needed by the imaging part thereof, maintains resolution of a wide diameter optical system, while increasing tool access, and allows stereographic or interferometric processing for depth and perspective information/visualization. Because the endoscope decreases the volume consumed by imaging optics such allows a larger fraction of the volume to be used for non-imaging tools, which allows smaller incisions in surgical and diagnostic medical applications thus produces less trauma to the patient or allows access to smaller volumes than is possible with larger instruments. The endoscope utilizes fiber optic light pipes in an outer layer for illumination, a multi-pupil imaging system in an inner annulus, and an access channel for other tools in the center. The endoscope is amenable to implementation as a flexible scope, and thus increases the utility thereof. Because the endoscope uses a multi-aperture pupil, it can also be utilized as an optical array, allowing stereographic and interferometric processing.

  16. Sparse aperture endoscope

    DOE Patents [OSTI]

    Fitch, J.P.

    1999-07-06

    An endoscope is disclosed which reduces the volume needed by the imaging part, maintains resolution of a wide diameter optical system, while increasing tool access, and allows stereographic or interferometric processing for depth and perspective information/visualization. Because the endoscope decreases the volume consumed by imaging optics such allows a larger fraction of the volume to be used for non-imaging tools, which allows smaller incisions in surgical and diagnostic medical applications thus produces less trauma to the patient or allows access to smaller volumes than is possible with larger instruments. The endoscope utilizes fiber optic light pipes in an outer layer for illumination, a multi-pupil imaging system in an inner annulus, and an access channel for other tools in the center. The endoscope is amenable to implementation as a flexible scope, and thus increases it's utility. Because the endoscope uses a multi-aperture pupil, it can also be utilized as an optical array, allowing stereographic and interferometric processing. 7 figs.

  17. Dynamic Aperture | Argonne National Laboratory

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Dynamic Aperture Dynamic Aperture is an array of dynamically-actuated fingers for real-time control of thin film deposition. All physical vapor-based processes are characterized by a unique spatial distribution of particle density (which is not necessarily constant over time due to changes in the source or environment) which needs to be controlled or modified. Variations in particle density are compensated for by shielding portions of the flux. Typically, this shielding simply consists of a

  18. SU-E-T-295: Simultaneous Beam Sampling and Aperture Shape Optimization for Station Parameter Optimized Radiation Therapy (SPORT)

    SciTech Connect (OSTI)

    Zarepisheh, M; Li, R; Xing, L; Ye, Y; Boyd, S

    2014-06-01

    Purpose: Station Parameter Optimized Radiation Therapy (SPORT) was recently proposed to fully utilize the technical capability of emerging digital LINACs, in which the station parameters of a delivery system, (such as aperture shape and weight, couch position/angle, gantry/collimator angle) are optimized altogether. SPORT promises to deliver unprecedented radiation dose distributions efficiently, yet there does not exist any optimization algorithm to implement it. The purpose of this work is to propose an optimization algorithm to simultaneously optimize the beam sampling and aperture shapes. Methods: We build a mathematical model whose variables are beam angles (including non-coplanar and/or even nonisocentric beams) and aperture shapes. To solve the resulting large scale optimization problem, we devise an exact, convergent and fast optimization algorithm by integrating three advanced optimization techniques named column generation, gradient method, and pattern search. Column generation is used to find a good set of aperture shapes as an initial solution by adding apertures sequentially. Then we apply the gradient method to iteratively improve the current solution by reshaping the aperture shapes and updating the beam angles toward the gradient. Algorithm continues by pattern search method to explore the part of the search space that cannot be reached by the gradient method. Results: The proposed technique is applied to a series of patient cases and significantly improves the plan quality. In a head-and-neck case, for example, the left parotid gland mean-dose, brainstem max-dose, spinal cord max-dose, and mandible mean-dose are reduced by 10%, 7%, 24% and 12% respectively, compared to the conventional VMAT plan while maintaining the same PTV coverage. Conclusion: Combined use of column generation, gradient search and pattern search algorithms provide an effective way to optimize simultaneously the large collection of station parameters and significantly improves

  19. Mosaic of coded aperture arrays

    DOE Patents [OSTI]

    Fenimore, Edward E.; Cannon, Thomas M.

    1980-01-01

    The present invention pertains to a mosaic of coded aperture arrays which is capable of imaging off-axis sources with minimum detector size. Mosaics of the basic array pattern create a circular on periodic correlation of the object on a section of the picture plane. This section consists of elements of the central basic pattern as well as elements from neighboring patterns and is a cyclic version of the basic pattern. Since all object points contribute a complete cyclic version of the basic pattern, a section of the picture, which is the size of the basic aperture pattern, contains all the information necessary to image the object with no artifacts.

  20. Computational study of ion beam extraction phenomena through multiple apertures

    SciTech Connect (OSTI)

    Hu, Wanpeng; Sang, Chaofeng; Tang, Tengfei; Wang, Dezhen, E-mail: wangdez@dlut.edu.cn [Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)] [Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Li, Ming; Jin, Dazhi; Tan, Xiaohua [Institute of Electronic Engineering, Mianyang, 621900 (China)] [Institute of Electronic Engineering, Mianyang, 621900 (China)

    2014-03-15

    The process of ion extraction through multiple apertures is investigated using a two-dimensional particle-in-cell code. We consider apertures with a fixed diameter with a hydrogen plasma background, and the trajectories of electrons, H{sup +} and H{sub 2}{sup +} ions in the self-consistently calculated electric field are traced. The focus of this work is the fundamental physics of the ion extraction, and not particular to a specific device. The computed convergence and divergence of the extracted ion beam are analyzed. We find that the extracted ion flux reaching the extraction electrode is non-uniform, and the peak flux positions change according to operational parameters, and do not necessarily match the positions of the apertures in the y-direction. The profile of the ion flux reaching the electrode is mainly affected by the bias voltage and the distance between grid wall and extraction electrode.

  1. Ion mobility spectrometer with virtual aperture grid

    DOE Patents [OSTI]

    Pfeifer, Kent B. (Los Lunas, NM); Rumpf, Arthur N. (Albuquerque, NM)

    2010-11-23

    An ion mobility spectrometer does not require a physical aperture grid to prevent premature ion detector response. The last electrodes adjacent to the ion collector (typically the last four or five) have an electrode pitch that is less than the width of the ion swarm and each of the adjacent electrodes is connected to a source of free charge, thereby providing a virtual aperture grid at the end of the drift region that shields the ion collector from the mirror current of the approaching ion swarm. The virtual aperture grid is less complex in assembly and function and is less sensitive to vibrations than the physical aperture grid.

  2. Synthetic Aperture Radar Persistent Scatterer Interferometry...

    Open Energy Information (Open El) [EERE & EIA]

    NA, 2010 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR)...

  3. A novel approach to correct the coded aperture misalignment for fast neutron imaging

    SciTech Connect (OSTI)

    Zhang, F. N.; Hu, H. S. Wang, D. M.; Jia, J.; Zhang, T. K.; Jia, Q. G.

    2015-12-15

    Aperture alignment is crucial for the diagnosis of neutron imaging because it has significant impact on the coding imaging and the understanding of the neutron source. In our previous studies on the neutron imaging system with coded aperture for large field of view, “residual watermark,” certain extra information that overlies reconstructed image and has nothing to do with the source is discovered if the peak normalization is employed in genetic algorithms (GA) to reconstruct the source image. Some studies on basic properties of residual watermark indicate that the residual watermark can characterize coded aperture and can thus be used to determine the location of coded aperture relative to the system axis. In this paper, we have further analyzed the essential conditions for the existence of residual watermark and the requirements of the reconstruction algorithm for the emergence of residual watermark. A gamma coded imaging experiment has been performed to verify the existence of residual watermark. Based on the residual watermark, a correction method for the aperture misalignment has been studied. A multiple linear regression model of the position of coded aperture axis, the position of residual watermark center, and the gray barycenter of neutron source with twenty training samples has been set up. Using the regression model and verification samples, we have found the position of the coded aperture axis relative to the system axis with an accuracy of approximately 20 μm. Conclusively, a novel approach has been established to correct the coded aperture misalignment for fast neutron coded imaging.

  4. Dynamic aperture evaluation for the RHIC 2009 polarized proton runs

    SciTech Connect (OSTI)

    Luo,Y.; Tepikain, S.; Bai, M.; Beebe-Wang, J.; Fischer, W.; Montag, c.; Robert-Demolaize, G.; Satogata, T.; Trbojevic, D.

    2009-05-04

    In this article we numerically evaluate the dynamic apertures of the proposed lattices for the coming Relativistic Heavy Ion Collider (RHIC) 2009 polarized proton (pp) 100 GeV and 250 GeV runs. One goal of this study is to find out the appropriate {beta}* for the coming 2009 pp runs. Another goal is to check the effect of second order chromaticity correction in the RHIC pp runs.

  5. Variable aperture collimator for high energy radiation

    DOE Patents [OSTI]

    Hill, Ronald A.

    1984-05-22

    An apparatus is disclosed providing a variable aperture energy beam collimator. A plurality of beam opaque blocks are in sliding interface edge contact to form a variable aperture. The blocks may be offset at the apex angle to provide a non-equilateral aperture. A plurality of collimator block assemblies may be employed for providing a channel defining a collimated beam. Adjacent assemblies are inverted front-to-back with respect to one another for preventing noncollimated energy from emerging from the apparatus. An adjustment mechanism comprises a cable attached to at least one block and a hand wheel mechanism for operating the cable. The blocks are supported by guide rods engaging slide brackets on the blocks. The guide rods are pivotally connected at each end to intermediate actuators supported on rotatable shafts to change the shape of the aperture. A divergent collimated beam may be obtained by adjusting the apertures of adjacent stages to be unequal.

  6. Application of a geocentrifuge and sterolithographically fabricated apertures to multiphase flow in complex fracture apertures.

    SciTech Connect (OSTI)

    Glenn E. McCreery; Robert D. Stedtfeld; Alan T. Stadler; Daphne L. Stoner; Paul Meakin

    2005-09-01

    A geotechnical centrifuge was used to investigate unsaturated multiphase fluid flow in synthetic fracture apertures under a variety of flow conditions. The geocentrifuge subjected the fluids to centrifugal forces allowing the Bond number to be systematically changed without adjusting the fracture aperture of the fluids. The fracture models were based on the concept that surfaces generated by the fracture of brittle geomaterials have a self-affine fractal geometry. The synthetic fracture surfaces were fabricated from a transparent epoxy photopolymer using sterolithography, and fluid flow through the transparent fracture models was monitored by an optical image acquisition system. Aperture widths were chosen to be representative of the wide range of geological fractures in the vesicular basalt that lies beneath the Idaho Nation Laboratory (INL). Transitions between different flow regimes were observed as the acceleration was changed under constant flow conditions. The experiments showed the transition between straight and meandering rivulets in smooth walled apertures (aperture width = 0.508 mm), the dependence of the rivulet width on acceleration in rough walled fracture apertures (average aperture width = 0.25 mm), unstable meandering flow in rough walled apertures at high acceleration (20g) and the narrowing of the wetted region with increasing acceleration during the penetration of water into an aperture filled with wetted particles (0.875 mm diameter glass spheres).

  7. Operations and Maintenance Manual for Large Aperture Scanner System

    SciTech Connect (OSTI)

    Jones, Anthony M.; Hall, Thomas E.

    2010-04-08

    Operations and maintenance manual includes detailed instructions for system assembly, use, and maintenance.

  8. DE-EE0006357 Improved Large Aperture Collector Manufacturing

    Office of Environmental Management (EM)

    ... 69,861.25 0.10 56,602.91 0.08 Rivet gun 67,277.21 0.10 109,018.54 0.16 ... 40,000 5.1 Equipment 62,629 (22,629) Build up roads 7,000 5.1 Contractual 23,000 ...

  9. Deployable large aperture optics system for remote sensing applications.

    SciTech Connect (OSTI)

    Sumali, Anton Hartono; Martin, Jeffrey W.; Main, John A.; Macke, Benjamin T.; Massad, Jordan Elias; Chaplya, Pavel Mikhail

    2004-04-01

    This report summarizes research into effects of electron gun control on piezoelectric polyvinylidene fluoride (PVDF) structures. The experimental apparatus specific to the electron gun control of this structure is detailed, and the equipment developed for the remote examination of the bimorph surface profile is outlined. Experiments conducted to determine the optimum electron beam characteristics for control are summarized. Clearer boundaries on the bimorphs control output capabilities were determined, as was the closed loop response. Further controllability analysis of the bimorph is outlined, and the results are examined. In this research, the bimorph response was tested through a matrix of control inputs of varying current, frequency, and amplitude. Experiments also studied the response to electron gun actuation of piezoelectric bimorph thin film covered with multiple spatial regions of control. Parameter ranges that yielded predictable control under certain circumstances were determined. Research has shown that electron gun control can be used to make macrocontrol and nanocontrol adjustments for PVDF structures. The control response and hysteresis are more linear for a small range of energy levels. Current levels needed for optimum control are established, and the generalized controllability of a PVDF bimorph structure is shown.

  10. PDII- Additional discussion of the dynamic aperture

    SciTech Connect (OSTI)

    Norman M. Gelfand

    2002-07-23

    This note is in the nature of an addition to the dynamic aperture calculations found in the report on the Proton Driver, FERMILAB-TM-2169. A extensive discussion of the Proton Driver lattice, as well as the nomenclature used to describe it can be found in TM-2169. Basically the proposed lattice is a racetrack design with the two arcs joined by two long straight sections. The straight sections are dispersion free. Tracking studies were undertaken with the objective of computing the dynamic aperture for the lattice and some of the results have been incorporated into TM-2169. This note is a more extensive report of those calculations.

  11. Synthetic aperture radar capabilities in development

    SciTech Connect (OSTI)

    Miller, M.

    1994-11-15

    The Imaging and Detection Program (IDP) within the Laser Program is currently developing an X-band Synthetic Aperture Radar (SAR) to support the Joint US/UK Radar Ocean Imaging Program. The radar system will be mounted in the program`s Airborne Experimental Test-Bed (AETB), where the initial mission is to image ocean surfaces and better understand the physics of low grazing angle backscatter. The Synthetic Aperture Radar presentation will discuss its overall functionality and a brief discussion on the AETB`s capabilities. Vital subsystems including radar, computer, navigation, antenna stabilization, and SAR focusing algorithms will be examined in more detail.

  12. Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products

    SciTech Connect (OSTI)

    Musgrove, Cameron

    2015-05-21

    Introduced a novel contrast metric in combination with traditional metrics to evaluate quality of coherent aperture radar, data products.

  13. Vacuum aperture isolator for retroreflection from laser-irradiated target

    DOE Patents [OSTI]

    Benjamin, Robert F.; Mitchell, Kenneth B.

    1980-01-01

    The disclosure is directed to a vacuum aperture isolator for retroreflection of a laser-irradiated target. Within a vacuum chamber are disposed a beam focusing element, a disc having an aperture and a recollimating element. The edge of the focused beam impinges on the edge of the aperture to produce a plasma which refracts any retroreflected light from the laser's target.

  14. Dual aperture dipole magnet with second harmonic component

    DOE Patents [OSTI]

    Praeg, W.F.

    1983-08-31

    An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

  15. Dual aperture dipole magnet with second harmonic component

    DOE Patents [OSTI]

    Praeg, Walter F.

    1985-01-01

    An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

  16. Compact high precision adjustable beam defining aperture

    DOE Patents [OSTI]

    Morton, Simon A; Dickert, Jeffrey

    2013-07-02

    The present invention provides an adjustable aperture for limiting the dimension of a beam of energy. In an exemplary embodiment, the aperture includes (1) at least one piezoelectric bender, where a fixed end of the bender is attached to a common support structure via a first attachment and where a movable end of the bender is movable in response to an actuating voltage applied to the bender and (2) at least one blade attached to the movable end of the bender via a second attachment such that the blade is capable of impinging upon the beam. In an exemplary embodiment, the beam of energy is electromagnetic radiation. In an exemplary embodiment, the beam of energy is X-rays.

  17. Off-momentum dynamic aperture for lattices in the RHIC heavy ion runs

    SciTech Connect (OSTI)

    Luo Y.; Bai, M.; Blaskiewicz, M.; Gu, X.; Fischer, W.; Marusic, A.; Roser, T.; Tepikian, S.; Zhang, S.

    2012-05-20

    To reduce transverse emittance growth rates from intrabeam scattering in the RHIC heavy ion runs, a lattice with an increased phase advance in the arc FODO cells was adopted in 2008-2011. During these runs, a large beam loss due to limited off-momentum dynamic aperture was observed during longitudinal RF re-bucketing and with transverse cooling. Based on the beam loss observations in the previous ion runs and the calculated off-momentum apertures, we decided to adopt the lattice used before 2008 for the 2012 U-U and Cu-Au runs. The observed beam decay and the measured momentum aperture in the 2012 U-U run are presented.

  18. Moving receive beam method and apparatus for synthetic aperture radar

    DOE Patents [OSTI]

    Kare, Jordin T.

    2001-01-01

    A method and apparatus for improving the performance of Synthetic Aperture Radar (SAR) systems by reducing the effect of "edge losses" associated with nonuniform receiver antenna gain. By moving the receiver antenna pattern in synchrony with the apparent motion of the transmitted pulse along the ground, the maximum available receiver antenna gain can be used at all times. Also, the receiver antenna gain for range-ambiguous return signals may be reduced, in some cases, by a large factor. The beam motion can be implemented by real-time adjustment of phase shifters in an electronically-steered phased-array antenna or by electronic switching of feed horns in a reflector antenna system.

  19. Dual-sided coded-aperture imager

    DOE Patents [OSTI]

    Ziock, Klaus-Peter

    2009-09-22

    In a vehicle, a single detector plane simultaneously measures radiation coming through two coded-aperture masks, one on either side of the detector. To determine which side of the vehicle a source is, the two shadow masks are inverses of each other, i.e., one is a mask and the other is the anti-mask. All of the data that is collected is processed through two versions of an image reconstruction algorithm. One treats the data as if it were obtained through the mask, the other as though the data is obtained through the anti-mask.

  20. Nonlinear Fields and Dynamic Aperture near Low-Order Resonances...

    Office of Scientific and Technical Information (OSTI)

    Research (ER) (US) Country of Publication: United States Language: English Subject: 43 PARTICLE ACCELERATORS; APERTURES; DAMPING; STORAGE RINGS; RESONANCE; CALCULATION METHODS; ...

  1. Functionalized apertures for the detection of chemical and biological materials

    DOE Patents [OSTI]

    Letant, Sonia E.; van Buuren, Anthony W.; Terminello, Louis J.; Thelen, Michael P.; Hope-Weeks, Louisa J.; Hart, Bradley R.

    2010-12-14

    Disclosed are nanometer to micron scale functionalized apertures constructed on a substrate made of glass, carbon, semiconductors or polymeric materials that allow for the real time detection of biological materials or chemical moieties. Many apertures can exist on one substrate allowing for the simultaneous detection of numerous chemical and biological molecules. One embodiment features a macrocyclic ring attached to cross-linkers, wherein the macrocyclic ring has a biological or chemical probe extending through the aperture. Another embodiment achieves functionalization by attaching chemical or biological anchors directly to the walls of the apertures via cross-linkers.

  2. Inversion of synthetic aperture radar interferograms for sources...

    Open Energy Information (Open El) [EERE & EIA]

    Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Jump to: navigation, search OpenEI Reference...

  3. Simultaneous beam sampling and aperture shape optimization for SPORT

    SciTech Connect (OSTI)

    Zarepisheh, Masoud; Li, Ruijiang; Xing, Lei; Ye, Yinyu

    2015-02-15

    Purpose: Station parameter optimized radiation therapy (SPORT) was recently proposed to fully utilize the technical capability of emerging digital linear accelerators, in which the station parameters of a delivery system, such as aperture shape and weight, couch position/angle, gantry/collimator angle, can be optimized simultaneously. SPORT promises to deliver remarkable radiation dose distributions in an efficient manner, yet there exists no optimization algorithm for its implementation. The purpose of this work is to develop an algorithm to simultaneously optimize the beam sampling and aperture shapes. Methods: The authors build a mathematical model with the fundamental station point parameters as the decision variables. To solve the resulting large-scale optimization problem, the authors devise an effective algorithm by integrating three advanced optimization techniques: column generation, subgradient method, and pattern search. Column generation adds the most beneficial stations sequentially until the plan quality improvement saturates and provides a good starting point for the subsequent optimization. It also adds the new stations during the algorithm if beneficial. For each update resulted from column generation, the subgradient method improves the selected stations locally by reshaping the apertures and updating the beam angles toward a descent subgradient direction. The algorithm continues to improve the selected stations locally and globally by a pattern search algorithm to explore the part of search space not reachable by the subgradient method. By combining these three techniques together, all plausible combinations of station parameters are searched efficiently to yield the optimal solution. Results: A SPORT optimization framework with seamlessly integration of three complementary algorithms, column generation, subgradient method, and pattern search, was established. The proposed technique was applied to two previously treated clinical cases: a head and

  4. Find Journals

    U.S. Department of Energy (DOE) all 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

  5. High numerical aperture multilayer Laue lenses

    SciTech Connect (OSTI)

    Morgan, Andrew J.; Prasciolu, Mauro; Andrejczuk, Andrzej; Krzywinski, Jacek; Meents, Alke; Pennicard, David; Graafsma, Heinz; Barty, Anton; Bean, Richard J.; Barthelmess, Miriam; Oberthuer, Dominik; Yefanov, Oleksandr; Aquila, Andrew; Chapman, Henry N.; Bajt, Saša

    2015-06-01

    The ever-increasing brightness of synchrotron radiation sources demands improved X-ray optics to utilise their capability for imaging and probing biological cells, nanodevices, and functional matter on the nanometer scale with chemical sensitivity. Here we demonstrate focusing a hard X-ray beam to an 8 nm focus using a volume zone plate (also referred to as a wedged multilayer Laue lens). This lens was constructed using a new deposition technique that enabled the independent control of the angle and thickness of diffracting layers to microradian and nanometer precision, respectively. This ensured that the Bragg condition is satisfied at each point along the lens, leading to a high numerical aperture that is limited only by its extent. We developed a phase-shifting interferometric method based on ptychography to characterise the lens focus. The precision of the fabrication and characterisation demonstrated here provides the path to efficient X-ray optics for imaging at 1 nm resolution.

  6. Very high numerical aperture light transmitting device

    DOE Patents [OSTI]

    Allison, Stephen W.; Boatner, Lynn A.; Sales, Brian C.

    1998-01-01

    A new light-transmitting device using a SCIN glass core and a novel calcium sodium cladding has been developed. The very high index of refraction, radiation hardness, similar solubility for rare earths and similar melt and viscosity characteristics of core and cladding materials makes them attractive for several applications such as high-numerical-aperture optical fibers and specialty lenses. Optical fibers up to 60 m in length have been drawn, and several simple lenses have been designed, ground, and polished. Preliminary results on the ability to directly cast optical components of lead-indium phosphate glass are also discussed as well as the suitability of these glasses as a host medium for rare-earth ion lasers and amplifiers.

  7. Synthetic aperture design for increased SAR image rate

    DOE Patents [OSTI]

    Bielek, Timothy P.; Thompson, Douglas G.; Walker, Bruce C.

    2009-03-03

    High resolution SAR images of a target scene at near video rates can be produced by using overlapped, but nevertheless, full-size synthetic apertures. The SAR images, which respectively correspond to the apertures, can be analyzed in sequence to permit detection of movement in the target scene.

  8. Dynamic aperture evaluation of the proposed lattices for the RHIC 2009 polarized proton run

    SciTech Connect (OSTI)

    Luo,Y.; Bai, M.; Beebe-Wang, J.; Fischer, W.; Montag, C.; Robert-Demolaize, G.; Satogata, T.; Tepikian, S.; Trbojevic, D.

    2009-01-02

    In the article we evaluate the dynamic apertures of the proposed lattices for the coming Relativistic Heavy Ion Collider (RHIC) 2009 polarized proton (pp) 100 GeV and 250 GeV runs. One goal of this study is to find out the appropriate {beta}* for the coming 2009 pp runs. Another goal is to study the effect of second order chromaticity correction in the RHIC pp runs.

  9. Microfabricated high-bandpass foucault aperture for electron microscopy

    DOE Patents [OSTI]

    Glaeser, Robert; Cambie, Rossana; Jin, Jian

    2014-08-26

    A variant of the Foucault (knife-edge) aperture is disclosed that is designed to provide single-sideband (SSB) contrast at low spatial frequencies but retain conventional double-sideband (DSB) contrast at high spatial frequencies in transmission electron microscopy. The aperture includes a plate with an inner open area, a support extending from the plate at an edge of the open area, a half-circle feature mounted on the support and located at the center of the aperture open area. The radius of the half-circle portion of reciprocal space that is blocked by the aperture can be varied to suit the needs of electron microscopy investigation. The aperture is fabricated from conductive material which is preferably non-oxidizing, such as gold, for example.

  10. Find Reports

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Classified reports - contact the SI-RMS Technical Report Collection for an appointment: ... Office 94 Cities of Gold Road Santa Fe, NM 87506 Where can I find Classified Reports? ...

  11. Find Clear

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    p align"left">

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

  12. Find Books

    U.S. Department of Energy (DOE) all 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...

  13. High-flux, high-temperature thermal vacuum qualification testing of a solar receiver aperture shield

    SciTech Connect (OSTI)

    Kerslake, T.W.; Mason, L.S.; Strumpf, H.J.

    1997-12-31

    As part of the International Space Station (ISS) Phase 1 program, NASA Lewis Research Center (LeRC) and the Russian Space Agency (RSA) teamed together to design, build and flight test the world`s first orbital Solar Dynamic Power System (SDPS) on the Russian space station Mir. The Solar Dynamic Flight Demonstration (SDFD) program was to operate a nominal 2 kWe SDPS on Mir for a period up to 1-year starting in late 1997. Unfortunately, the SDFD mission was demanifested from the ISS Phase 1 shuttle program in early 1996. However, substantial flight hardware and prototypical flight hardware was built including a heat receiver and aperture shield. The aperture shield comprises the front face of the cylindrical cavity heat receiver and is located at the focal plane of the solar concentrator. It is constructed of a stainless steel plate with a 1-m outside diameter, a 0.24-m inside diameter and covered with high-temperature, refractory metal multi-foil insulation (MFI). The aperture shield must minimize heat loss from the receiver cavity, provide a stiff, high strength structure to accommodate shuttle launch loads and protect receiver structures from highly concentrated solar fluxes during concentrator off-pointing events. To satisfy Mir operational safety protocols, the aperture shield was required to accommodate direct impingement of the intensely concentrated solar image for a 1-hour period. To verify thermal-structural durability under the anticipated high-flux, high-temperature loading, an aperture shield test article was constructed and underwent a series of two tests in a large thermal vacuum chamber configured with a reflective, point-focus solar concentrator and a solar simulator. The test article was positioned near the focal plane and exposed to concentrated solar flux for a period of 1-hour. In the first test, a near equilibrium temperature of 1862 K was attained in the center of the shield hot spot. In the second test, with increased incident flux, a near

  14. SU-E-T-10: A Dosimetric Comparison of Copper to Lead-Alloy Apertures for Electron Beam Therapy

    SciTech Connect (OSTI)

    Rusk, B; Hogstrom, K; Gibbons, J; Carver, R

    2014-06-01

    Purpose: To evaluate dosimetric differences of copper compared to conventional lead-alloy apertures for electron beam therapy. Methods: Copper apertures were manufactured by .decimal, Inc. and matching lead-alloy, Cerrobend, apertures were constructed for 32 square field sizes (2×2 – 20×20 cm{sup 2}) for five applicator sizes (6×6–25×25 cm{sup 2}). Percent depth-dose and off-axis-dose profiles were measured using an electron diode in water with copper and Cerrobend apertures for a subset of aperture sizes (6×6, 10×10, 25×25 cm{sup 2}) and energies (6, 12, 20 MeV). Dose outputs were measured for all field size-aperture combinations and available energies (6–20 MeV). Measurements were taken at 100 and 110 cm SSDs. Using this data, 2D planar absolute dose distributions were constructed and compared. Passing criteria were ±2% of maximum dose or 1-mm distance-to-agreement for 99% of points. Results: A gamma analysis of the beam dosimetry showed 93 of 96 aperture size, applicator, energy, and SSD combinations passed the 2%/1mm criteria. Failures were found for small field size-large applicator combinations at 20 MeV and 100-cm SSD. Copper apertures showed a decrease in bremsstrahlung production due to copper's lower atomic number compared to Cerrobend (greatest difference was 2.5% at 20 MeV). This effect was most prominent at the highest energies with large amounts of shielding material present (small field size-large applicator). Also, an increase in electrons scattered from the collimator edge of copper compared to Cerrobend resulted in an increased dose at the field edge for copper at shallow depths (greatest increase was 1% at 20 MeV). Conclusion: Apertures for field sizes ≥6×6 cm{sup 2} at any energy, or for small fields (≤4×4 cm{sup 2}) at energies <20 MeV, showed dosimetric differences less than 2%/1mm for more than 99% of points. All field size-applicator size-energy combinations passed 3%/1mm criteria for 100% of points. Work partially funded

  15. FODO-Supercell Based Compact Ring Design with Tunable Momentum Compaction and Optimized Dynamic Aperture

    SciTech Connect (OSTI)

    Sun, Yipeng; /SLAC

    2012-05-11

    A storage ring with tunable momentum compaction has the advantage in achieving different RMS bunch length with similar RF capacity, which is potentially useful for many applications, such as linear collider damping ring and pre-damping ring where injected beam has a large energy spread and a large transverse emittance. A tunable bunch length also makes the commissioning and fine tuning easier in manipulating the single bunch instabilities. In this paper, a compact ring design based on a supercell is presented, which achieves a tunable momentum compaction while maintaining a large dynamic aperture.

  16. High numerical aperture multilayer Laue lenses

    DOE PAGES-Beta [OSTI]

    Morgan, Andrew J.; Prasciolu, Mauro; Andrejczuk, Andrzej; Krzywinski, Jacek; Meents, Alke; Pennicard, David; Graafsma, Heinz; Barty, Anton; Bean, Richard J.; Barthelmess, Miriam; et al

    2015-06-01

    The ever-increasing brightness of synchrotron radiation sources demands improved X-ray optics to utilise their capability for imaging and probing biological cells, nanodevices, and functional matter on the nanometer scale with chemical sensitivity. Here we demonstrate focusing a hard X-ray beam to an 8 nm focus using a volume zone plate (also referred to as a wedged multilayer Laue lens). This lens was constructed using a new deposition technique that enabled the independent control of the angle and thickness of diffracting layers to microradian and nanometer precision, respectively. This ensured that the Bragg condition is satisfied at each point along themore » lens, leading to a high numerical aperture that is limited only by its extent. We developed a phase-shifting interferometric method based on ptychography to characterise the lens focus. The precision of the fabrication and characterisation demonstrated here provides the path to efficient X-ray optics for imaging at 1 nm resolution.« less

  17. Motion Measurement for Synthetic Aperture Radar.

    SciTech Connect (OSTI)

    Doerry, Armin W.

    2015-01-01

    Synthetic Aperture Radar (SAR) measures radar soundings from a set of locations typically along the flight path of a radar platform vehicle. Optimal focusing requires precise knowledge of the sounding source locations in 3 - D space with respect to the target scene. Even data driven focusing techniques (i.e. autofocus) requires some degree of initial fidelity in the measurements of the motion of the radar. These requirements may be quite stringent especially for fine resolution, long ranges, and low velocities. The principal instrument for measuring motion is typically an Inertial Measurement Unit (IMU), but these instruments have inherent limi ted precision and accuracy. The question is %22How good does an IMU need to be for a SAR across its performance space?%22 This report analytically relates IMU specifications to parametric requirements for SAR. - 4 - Acknowledgements Th e preparation of this report is the result of a n unfunded research and development activity . Although this report is an independent effort, it draws heavily from limited - release documentation generated under a CRADA with General Atomics - Aeronautical System, Inc. (GA - ASI), and under the Joint DoD/DOE Munitions Program Memorandum of Understanding. Sandia National Laboratories is a multi - program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of En ergy's National Nuclear Security Administration under contract DE - AC04 - 94AL85000.

  18. 3?m aperture probes for near-field terahertz transmission microscopy...

    Office of Scientific and Technical Information (OSTI)

    3?m aperture probes for near-field terahertz transmission microscopy. Citation Details In-Document Search Title: 3?m aperture probes for near-field terahertz transmission ...

  19. Measured Radiation and Background Levels During Transmission of Megawatt Electron Beams Through Millimeter Apertures

    SciTech Connect (OSTI)

    Alarcon, Ricardo [Arizona State University, Glendale, AZ (United States); Balascuta, S. [Arizona State University, Glendale, AZ (United States); Benson, Stephen V. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Bertozzi, William [Massachusetts Institute of Technology, Cambridge, MA (United States); Boyce, James R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Cowan, Ray [Massachusetts Institute of Technology, Cambridge, MA (United States); Douglas, David R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Evtushenko, Pavel [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Fisher, P. [Massachusetts Institute of Technology, Cambridge, MA (United States); Ihloff, Ernest E. [Hampton University, Hampton, VA (United States); Kalantarians, Narbe [Hampton University, Hampton, VA (United States); Kelleher, Aidan Michael [Massachusetts Institute of Technology, Cambridge, MA (United States); Krossler, W. J. [William and Mary College, Williamsburg, VA (United States); Legg, Robert A. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Long, Elena [University of New Hampshire, Durham, NH (United States); Milner, Richard [Massachusetts Institute of Technology, Cambridge, MA (United States); Neil, George R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Ou, Longwu [Massachusetts Institute of Technology, Cambridge, MA (United States); Schmookler, Barack Abraham [Massachusetts Institute of Technology, Cambridge, MA (United States); Tennant, Christopher D. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Tschalar, C. [Massachusetts Institute of Technology, Cambridge, MA (United States); Williams, Gwyn P. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Zhang, Shukui [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

    2013-11-01

    We report measurements of photon and neutron radiation levels observed while transmitting a 0.43 MW electron beam through millimeter-sized apertures and during beam-off, but accelerating gradient RF-on, operation. These measurements were conducted at the Free-Electron Laser (FEL) facility of the Jefferson National Accelerator Laboratory (JLab) using a 100 MeV electron beam from an energy-recovery linear accelerator. The beam was directed successively through 6 mm, 4 mm, and 2 mm diameter apertures of length 127 mm in aluminum at a maximum current of 4.3 mA (430 kW beam power). This study was conducted to characterize radiation levels for experiments that need to operate in this environment, such as the proposed DarkLight Experiment. We find that sustained transmission of a 430 kW continuous-wave (CW) beam through a 2 mm aperture is feasible with manageable beam-related backgrounds. We also find that during beam-off, RF-on operation, multipactoring inside the niobium cavities of the accelerator cryomodules is the primary source of ambient radiation when the machine is tuned for 130 MeV operation.

  20. Find Clear

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    p align="left"></p> <p align="left"></p> Find Clear Slide Title Duration Status myMail@adobe.com http://Adobe.com More Info>> <p align="left"></p> <p align="left"></p> <p align="left"></p> Go No Matches Found

  1. Lynx: A High-Resolution Synthetic Aperture Radar

    SciTech Connect (OSTI)

    Doerry, A.W.; Hensley, W.H.; Pace, F.; Stence, J.; Tsunoda, S.I.; Walker, B.C.; Woodring, M.

    1999-03-08

    Lynx is a high resolution, synthetic aperture radar (SAR) that has been designed and built by Sandia National Laboratories in collaboration with General Atomics (GA). Although Lynx may be operated on a wide variety of manned and unmanned platforms, it is primarily intended to be fielded on unmanned aerial vehicles. In particular, it may be operated on the Predator, I-GNAT, or Prowler II platforms manufactured by GA Aeronautical Systems, Inc. The Lynx production weight is less than 120 lb. and has a slant range of 30 km (in 4 mm/hr rain). It has operator selectable resolution and is capable of 0.1 m resolution in spotlight mode and 0.3 m resolution in stripmap mode. In ground moving target indicator mode, the minimum detectable velocity is 6 knots with a minimum target cross-section of 10 dBsm. In coherent change detection mode, Lynx makes registered, complex image comparisons either of 0.1 m resolution (minimum) spotlight images or of 0.3 m resolution (minimum) strip images. The Lynx user interface features a view manager that allows it to pan and zoom like a video camera. Lynx was developed under corporate finding from GA and will be manufactured by GA for both military and commercial applications. The Lynx system architecture will be presented and some of its unique features will be described. Imagery at the finest resolutions in both spotlight and strip modes have been obtained and will also be presented.

  2. Positron Emission Tomography/Computed Tomography Findings During Therapy Predict Outcome in Patients With Diffuse Large B-Cell Lymphoma Treated With Chemotherapy Alone but Not in Those Who Receive Consolidation Radiation

    SciTech Connect (OSTI)

    Dabaja, Bouthaina S.; Hess, Kenneth; Shihadeh, Ferial; Podoloff, Donald A.; Medeiros, L. Jeffrey; Mawlawi, Osama; Arzu, Isidora; Oki, Yasuhiro; Hagemeister, Fredrick B.; Fayad, Luis E.; Rodriguez, Alma

    2014-06-01

    Purpose: To assess the value of mid-therapy positron emission tomography (PET) findings for predicting survival and disease progression in patients with diffuse large B-cell lymphoma, considering type of therapy (chemotherapy with or without radiation therapy). Methods and Materials: We retrospectively evaluated 294 patients with histologically confirmed diffuse large B-cell lymphoma with respect to age, sex, disease stage, International Prognostic Index score, mid-therapy PET findings (positive or negative), and disease status after therapy and at last follow-up. Overall survival (OS) and progression-free survival (PFS) were compared according to mid-therapy PET findings. Results: Of the 294 patients, 163 (55%) were male, 144 (49%) were age >61 years, 110 (37%) had stage I or II disease, 219 (74%) had International Prognostic Index score ≤2, 216 (73%) received ≥6 cycles of rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone, and 88 (30%) received consolidation radiation therapy. Five-year PFS and OS rates were associated with mid-therapy PET status: PFS was 78% for those with PET-negative (PET−) disease versus 63% for PET-positive (PET+) disease (P=.024), and OS was 82% for PET− versus 62% for PET+ (P<.002). These associations held true for patients who received chemotherapy only (PFS 71% for PET− vs 52% PET+ [P=.012], OS 78% for PET− and 51% for PET+ [P=.0055]) but not for those who received consolidation radiation therapy (PFS 84% PET− vs 81% PET+ [P=.88]; OS 90% PET− vs 81% PET+ [P=.39]). Conclusion: Mid-therapy PET can predict patient outcome, but the use of consolidation radiation therapy may negate the significance of mid-therapy findings.

  3. Receiver for solar energy collector having improved aperture aspect

    DOE Patents [OSTI]

    McIntire, William R.

    1984-01-01

    A secondary concentrator for use in receiver systems for linear focusing primary concentrators is provided with reflector wings at each end. The wings increase the capture of light rays reflected from areas adjacent the rim of a primary concentrator, increasing the apparent aperture size of the absorber as viewed from the rim of the primary concentrator. The length, tilt, and curvature of the wing reflectors can be adjusted to provide an absorber having a desired aperture aspect.

  4. Apodised aperture using rotation of plane of polarization

    DOE Patents [OSTI]

    Simmons, W.W.; Leppelmeier, G.W.; Johnson, B.C.

    1975-09-01

    An apodised aperture based on the rotation of plane of polarization producing desirable characteristics on a transmitted light beam such as beam profiling in high flux laser amplifier chains is described. The apodised aperture is made with a lossless element by using one or more polarizers and/or analyzers and magneto-optical Faraday means for selectively rotating the plane of polarized radiation over the cross section to effect the desired apodisation. (auth)

  5. Casimir-Polder repulsion near edges: Wedge apex and a screen with an aperture

    SciTech Connect (OSTI)

    Milton, Kimball A.; Abalo, E. K.; Parashar, Prachi; Pourtolami, Nima; Brevik, Iver; Ellingsen, Simen A.

    2011-06-15

    Although repulsive effects have been predicted for quantum vacuum forces between bodies with nontrivial electromagnetic properties, such as between a perfect electric conductor and a perfect magnetic conductor, realistic repulsion seems difficult to achieve. Repulsion is possible if the medium between the bodies has a permittivity in value intermediate to those of the two bodies, but this may not be a useful configuration. Here, inspired by recent numerical work, we initiate analytic calculations of the Casimir-Polder interaction between an atom with anisotropic polarizability and a plate with an aperture. In particular, for a semi-infinite plate, and, more generally, for a wedge, the problem is exactly solvable, and for sufficiently large anisotropy, Casimir-Polder repulsion is indeed possible, in agreement with the previous numerical studies. In order to achieve repulsion, what is needed is a sufficiently sharp edge (not so very sharp, in fact) so that the directions of polarizability of the conductor and the atom are roughly normal to each other. The machinery for carrying out the calculation with a finite aperture is presented. As a motivation for the quantum calculation, we carry out the corresponding classical analysis for the force between a dipole and a metallic sheet with a circular aperture, when the dipole is on the symmetry axis and oriented in the same direction.

  6. Evaluating the effect of internal aperture variability on transport in kilometer scale discrete fracture networks

    DOE PAGES-Beta [OSTI]

    Makedonska, Nataliia; Hyman, Jeffrey D.; Karra, Satish; Painter, Scott L.; Gable, Carl W.; Viswanathan, Hari S.

    2016-06-17

    The apertures of natural fractures in fractured rock are highly heterogeneous. However, in-fracture aperture variability is often neglected in flow and transport modeling and individual fractures are assumed to have uniform aperture distribution. The relative importance of in-fracture variability in flow and transport modeling within kilometer18 scale field–scale fracture networks has been under a matter of debate for a long time because the flow in each single fracture is controlled not only by in-fracture variability but also by boundary conditions. Computational limitations have previously prohibited researchers from investigating the relative importance of in-fracture variability in flow and transport modeling withinmore » large-scale fracture networks. We address this question by incorporating internal heterogeneity of individual fractures into 23 flow simulations within kilometer scale three-dimensional fracture networks, where fracture intensity, P32 (ratio between total fracture area and domain volume) is between 0.027 and 0.031 [1/m]. A recently developed discrete fracture network (DFN) simulation capability, dfnWorks, is used to generate DFNs that include in-fracture aperture variability represented by a stationary log-normal stochastic field with various correlation lengths and variances. The Lagrangian transport parameters, non-reacting travel time and cumulative retention, are calculated along particles streamlines. It is observed that due to local flow channeling early particle travel times are more sensitive to in-fracture variability than the tails of travel time distributions, where no significant effect of the in-fracture transmissivity variations and spatial correlation length is observed.« less

  7. Wide aperture seismic recording in offshore west Sicily and Bolivia

    SciTech Connect (OSTI)

    Tilander, N.G.; Lattimore, R.K.

    1994-12-31

    Seismic operations using the Wide Aperture Recording (WAR) technique were carried out in offshore west Sicily (16.5 km offsets) and in the Sub-Andean Cordillera of Bolivia (9.0 km offsets) where conventional offset data have traditionally proved inadequate for imaging complex subsurface structures. In both cases, noise-free wide aperture events were visible at long offsets, and were successfully stacked using both hyperbolic and linear moveout. In the Sicily datasets, the resulting seismic images disagree with earlier structural interpretations, but the lack of reliable ``calibration`` data in terms of well control or usable conventional seismic data make final evaluation and interpretation of the Sicily wide aperture data ambiguous. In Bolivia good quality seismic data are present across a portion of the WAR survey; the results show that the wide aperture technique may produce a valid structural image, provided the subsurface geometries are sufficiently broad and shallow. For tight structures, the technique is unlikely to produce valid images. In general, the authors` studies show that considerable effort is required at the data processing and interpretation stage, including full waveform and ray-trace modeling, in order to identify event arrivals and to attempt to validate the wide aperture structural images. Reliable calibration data in the form of well control or conventional seismic data are needed in order to provide an understanding of the WAR results.

  8. Synthetic aperture integration (SAI) algorithm for SAR imaging

    DOE Patents [OSTI]

    Chambers, David H; Mast, Jeffrey E; Paglieroni, David W; Beer, N. Reginald

    2013-07-09

    A method and system for detecting the presence of subsurface objects within a medium is provided. In some embodiments, the imaging and detection system operates in a multistatic mode to collect radar return signals generated by an array of transceiver antenna pairs that is positioned across the surface and that travels down the surface. The imaging and detection system pre-processes the return signal to suppress certain undesirable effects. The imaging and detection system then generates synthetic aperture radar images from real aperture radar images generated from the pre-processed return signal. The imaging and detection system then post-processes the synthetic aperture radar images to improve detection of subsurface objects. The imaging and detection system identifies peaks in the energy levels of the post-processed image frame, which indicates the presence of a subsurface object.

  9. Optimization of the Dynamic Aperture for SPEAR3 Low-Emittance...

    Office of Scientific and Technical Information (OSTI)

    Subject: 43 PARTICLE ACCELERATORS; ACCELERATORS; ALGORITHMS; APERTURES; BEAM INJECTION; BETATRONS; CONFIGURATION; DAMPING; EFFICIENCY; GENETICS; LIFETIME; MAGNETS; OPTICS; ...

  10. Optimization of dynamic aperture for hadron lattices in eRHIC

    SciTech Connect (OSTI)

    Jing, Yichao; Litvinenko, Vladimir; Trbojevic, Dejan

    2015-05-03

    The potential upgrade of the Relativistic Heavy Ion Collider (RHIC) to an electron ion collider (eRHIC) involves numerous extensive changes to the existing collider complex. The expected very high luminosity is planned to be achieved at eRHIC with the help of squeezing the beta function of the hadron ring at the IP to a few cm, causing a large rise of the natural chromaticities and thus bringing with it challenges for the beam long term stability (Dynamic aperture). We present our effort to expand the DA by carefully tuning the nonlinear magnets thus controlling the size of the footprints in tune space and all lower order resonance driving terms. We show a reasonably large DA through particle tracking over millions of turns of beam revolution.

  11. Sandia National Laboratories: Synthetic Aperture Radar (SAR) Imagery

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Images Facebook Twitter YouTube Flickr RSS Pathfinder Airborne ISR Systems Synthetic Aperture Radar (SAR) Imagery The following is a selection of imagery available for your viewing, sorted by frequency band and/or program. (Note: Resolutions are for original images prior to downsampling for web viewing.) Images are available for public reproduction. Please credit Sandia using the following statement 'Courtesy of Sandia National Laboratories, Airborne ISR' Click thumbnails below to enlarge

  12. Limits to Clutter Cancellation in Multi-Aperture GMTI Data

    SciTech Connect (OSTI)

    Doerry, Armin W.; Bickel, Douglas L.

    2015-03-01

    Multi-aperture or multi-subaperture antennas are fundamental to Ground Moving Target Indicator (GMTI) radar systems in order to detect slow-moving targets with Doppler characteristics similar to clutter. Herein we examine the performance of several subaperture architectures for their clutter cancelling performance. Significantly, more antenna phase centers isn’t always better, and in fact is sometimes worse, for detecting targets.

  13. Penning discharge ion source with self-cleaning aperture

    DOE Patents [OSTI]

    Gavin, B.F.; MacGill, R.A.; Thatcher, R.K.

    1980-11-10

    An ion source of the Penning discharge type having a self-cleaning aperture is provided by a second dynode with an exit aperture in a position opposite a first dynode, from which the ions are sputtered, two opposing cathodes, each with an anode for accelerating electrons emitted from the cathodes into a cylindrical space defined by the first and second dynode. A support gas maintained in this space is ionized by the electrons. While the cathodes are supplied with a negative pulse to emit electrons, the first dynode is supplied with a negative pulse (e.g., -300 V) to attract atoms of the ionized gas (plasma). At the same time, the second dynode may also be supplied with a small voltage that is negative with respect to the plasma (e.g., -5 V) for tuning the position of the plasma miniscus for optimum extraction geometry. When the negative pulse to the first dynode is terminated, the second dynode is driven strongly negative (e.g., -600 V) thereby allowing heavy sputtering to take place for a short period to remove virtually all of the atoms deposited on the second dynode from material sputtered off the first dynode. An extractor immediately outside the exit aperture of the second dynode is maintained at ground potential while the anode, dynode, and cathode reference voltage is driven strongly positive (about +20 kV to +30 kV) so that ions accelerated through the aperture will be at ground potential. Material from the first dynode deposited on the second dynode will be sputtered, in time, to add to the ion beam.

  14. Penning discharge ion source with self-cleaning aperture

    DOE Patents [OSTI]

    Gavin, Basil F.; MacGill, Robert A.; Thatcher, Raymond K.

    1982-01-01

    An ion source of the Penning discharge type having a self-cleaning aperture is provided by a second dynode (24) with an exit aperture (12) in a position opposite a first dynode 10a, from which the ions are sputtered, two opposing cathodes (14, 16), each with an anode (18, 20) for accelerating electrons emitted from the cathodes into a cylindrical space defined by the first and second dynode. A support gas maintained in this space is ionized by the electrons. While the cathodes are supplied with a negative pulse to emit electrons, the first dynode is supplied with a negative pulse (e.g., -300 V) to attract atoms of the ionized gas (plasma). At the same time, the second dynode may also be supplied with a small voltage that is negative with respect to the plasma (e.g., -5 V) for tuning the position of the plasma miniscus for optimum extraction geometry. When the negative pulse to the first dynode is terminated, the second dynode is driven strongly negative (e.g., -600 V) thereby allowing heavy sputtering to take place for a short period to remove virtually all of the atoms deposited on the second dynode from material sputtered off the first dynode. An extractor (22) immediately outside the exit aperture of the second dynode is maintained at ground potential during this entire period of sputtering while the anode, dynode and cathode reference voltage is driven strongly positive (about +20 kV to +30 kV) so that ions accelerated through the aperture will be at ground potential. In that manner, material from the first dynode deposited on the second dynode will be sputtered, in time, to add to the ion beam. Atoms sputtered from the second dynode which do not become ionized and exit through the slit will be redeposited on the first dynode, and hence recycled for further ion beam generation during subsequent operating cycles.

  15. Apodized RFI filtering of synthetic aperture radar images

    SciTech Connect (OSTI)

    Doerry, Armin Walter

    2014-02-01

    Fine resolution Synthetic Aperture Radar (SAR) systems necessarily require wide bandwidths that often overlap spectrum utilized by other wireless services. These other emitters pose a source of Radio Frequency Interference (RFI) to the SAR echo signals that degrades SAR image quality. Filtering, or excising, the offending spectral contaminants will mitigate the interference, but at a cost of often degrading the SAR image in other ways, notably by raising offensive sidelobe levels. This report proposes borrowing an idea from nonlinear sidelobe apodization techniques to suppress interference without the attendant increase in sidelobe levels. The simple post-processing technique is termed Apodized RFI Filtering (ARF).

  16. Phase correction system for automatic focusing of synthetic aperture radar

    DOE Patents [OSTI]

    Eichel, Paul H. (Albuquerque, NM); Ghiglia, Dennis C. (Placitas, NM); Jakowatz, Jr., Charles V. (Albuquerque, NM)

    1990-01-01

    A phase gradient autofocus system for use in synthetic aperture imaging accurately compensates for arbitrary phase errors in each imaged frame by locating highlighted areas and determining the phase disturbance or image spread associated with each of these highlight areas. An estimate of the image spread for each highlighted area in a line in the case of one dimensional processing or in a sector, in the case of two-dimensional processing, is determined. The phase error is determined using phase gradient processing. The phase error is then removed from the uncorrected image and the process is iteratively performed to substantially eliminate phase errors which can degrade the image.

  17. High numerical aperture projection system for extreme ultraviolet projection lithography

    DOE Patents [OSTI]

    Hudyma, Russell M.

    2000-01-01

    An optical system is described that is compatible with extreme ultraviolet radiation and comprises five reflective elements for projecting a mask image onto a substrate. The five optical elements are characterized in order from object to image as concave, convex, concave, convex, and concave mirrors. The optical system is particularly suited for ring field, step and scan lithography methods. The invention uses aspheric mirrors to minimize static distortion and balance the static distortion across the ring field width which effectively minimizes dynamic distortion. The present invention allows for higher device density because the optical system has improved resolution that results from the high numerical aperture, which is at least 0.14.

  18. Synthetic aperture radar images with composite azimuth resolution

    DOE Patents [OSTI]

    Bielek, Timothy P; Bickel, Douglas L

    2015-03-31

    A synthetic aperture radar (SAR) image is produced by using all phase histories of a set of phase histories to produce a first pixel array having a first azimuth resolution, and using less than all phase histories of the set to produce a second pixel array having a second azimuth resolution that is coarser than the first azimuth resolution. The first and second pixel arrays are combined to produce a third pixel array defining a desired SAR image that shows distinct shadows of moving objects while preserving detail in stationary background clutter.

  19. Coded aperture imaging with self-supporting uniformly redundant arrays

    DOE Patents [OSTI]

    Fenimore, Edward E.

    1983-01-01

    A self-supporting uniformly redundant array pattern for coded aperture imaging. The present invention utilizes holes which are an integer times smaller in each direction than holes in conventional URA patterns. A balance correlation function is generated where holes are represented by 1's, nonholes are represented by -1's, and supporting area is represented by 0's. The self-supporting array can be used for low energy applications where substrates would greatly reduce throughput. The balance correlation response function for the self-supporting array pattern provides an accurate representation of the source of nonfocusable radiation.

  20. DESIGN OF PHASE INDUCED AMPLITUDE APODIZATION CORONAGRAPHS OVER SQUARE APERTURES

    SciTech Connect (OSTI)

    Pueyo, Laurent; Jeremy Kasdin, N.; Carlotti, Alexis; Vanderbei, Robert

    2011-08-01

    The purpose of this paper is to present the results of a theoretical study pertaining to the feasibility of Phase Induced Amplitude Apodization (PIAA) units using deformable mirrors (DMs). We begin by reviewing the general derivation of the design equations driving PIAA. We then show how to solve these equations for square apertures and show the performance of pure PIAA systems in the ray optics regime. We tie these design equations into the study of edge diffraction effects and provide a general expression for the field after a full propagation through a PIAA coronagraph. Third, we illustrate how a combination of pre- and post-apodizers yields a contrast of 10{sup -10} even in the presence of diffractive effects, for configuration with neither wavefront errors or wavefront control. Finally, we present novel PIAA configurations over square apertures which circumvent the constraints on the manufacturing of PIAA optics by inducing the apodization with two square DMs. Such solutions rely on pupil size smaller than currently envisioned static PIAA solutions and thus require aggressive pre- and post-apodizing screens in order to mitigate for diffractive effect between the two mirrors. As a result they are associated with significant loss in performance, throughput in particular.

  1. Optimization of the Dynamic Aperture for SPEAR3 Low-Emittance...

    Office of Scientific and Technical Information (OSTI)

    There is a smaller dynamic aperture for the lower emittance optics due to a stronger ... DAMPING; EFFICIENCY; GENETICS; LIFETIME; MAGNETS; OPTICS; OPTIMIZATION; RESONANCE

  2. Apparatus and method for deterministic control of surface figure during full aperture polishing

    DOE Patents [OSTI]

    Suratwala, Tayyab Ishaq; Feit, Michael Dennis; Steele, William Augustus

    2013-11-19

    A polishing system configured to polish a lap includes a lap configured to contact a workpiece for polishing the workpiece; and a septum configured to contact the lap. The septum has an aperture formed therein. The radius of the aperture and radius the workpiece are substantially the same. The aperture and the workpiece have centers disposed at substantially the same radial distance from a center of the lap. The aperture is disposed along a first radial direction from the center of the lap, and the workpiece is disposed along a second radial direction from the center of the lap. The first and second radial directions may be opposite directions.

  3. Time-frequency analysis of synthetic aperture radar signals

    SciTech Connect (OSTI)

    Johnston, B.

    1996-08-01

    Synthetic aperture radar (SAR) has become an important tool for remote sensing of the environment. SAR is a set of digital signal processing algorithms that are used to focus the signal returned to the radar because radar systems in themselves cannot produce the high resolution images required in remote sensing applications. To reconstruct an image, several parameters must be estimated and the quality of output image depends on the degree of accuracy of these parameters. In this thesis, we derive the fundamental SAR algorithms and concentrate on the estimation of one of its critical parameters. We show that the common technique for estimating this particular parameter can sometimes lead to erroneous results and reduced quality images. We also employ time-frequency analysis techniques to examine variations in the radar signals caused by platform motion and show how these results can be used to improve output image quality.

  4. Interpretation of Synthetic Aperture Radar measurements of ocean currents

    SciTech Connect (OSTI)

    Rufenach, C.L.; Shuchman, R.A.; Lyzenga, D.R.

    1983-02-28

    Synthetic Aperture Radar (SAR) experiments hae been performed over the last few years to measure ocean currents inferred from shifts in the Doppler spectral peak. Interpretations of aircraft SAR measurements, when compared with limited surface values, tend to underestimate the currents by about 25%. A theory is developed that modifies the classical Doppler expression showing that the radar measurements are dependent on the radar processor (system) bandwidth and the received signal bandwidth. Measured bandwidths give a correction that increases the inferred current values by about 25%, bringing the measurements into good agreement. This new correction lends credence to the theory and increases the potential for application of SAR systems to future ocean current measurements. SAR measurements should include the determination of processor and signal bandwidths such that this correction can be applied.

  5. Hybrid Compton camera/coded aperture imaging system

    DOE Patents [OSTI]

    Mihailescu, Lucian (Livermore, CA); Vetter, Kai M. (Alameda, CA)

    2012-04-10

    A system in one embodiment includes an array of radiation detectors; and an array of imagers positioned behind the array of detectors relative to an expected trajectory of incoming radiation. A method in another embodiment includes detecting incoming radiation with an array of radiation detectors; detecting the incoming radiation with an array of imagers positioned behind the array of detectors relative to a trajectory of the incoming radiation; and performing at least one of Compton imaging using at least the imagers and coded aperture imaging using at least the imagers. A method in yet another embodiment includes detecting incoming radiation with an array of imagers positioned behind an array of detectors relative to a trajectory of the incoming radiation; and performing Compton imaging using at least the imagers.

  6. The solid angle (geometry factor) for a spherical surface source and an arbitrary detector aperture

    DOE PAGES-Beta [OSTI]

    Favorite, Jeffrey A.

    2016-01-13

    It is proven that the solid angle (or geometry factor, also called the geometrical efficiency) for a spherically symmetric outward-directed surface source with an arbitrary radius and polar angle distribution and an arbitrary detector aperture is equal to the solid angle for an isotropic point source located at the center of the spherical surface source and the same detector aperture.

  7. Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling

    SciTech Connect (OSTI)

    Randall S. Seright

    2007-09-30

    This final technical progress report describes work performed from October 1, 2004, through May 16, 2007, for the project, 'Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling'. We explored the potential of pore-filling gels for reducing excess water production from both fractured and unfractured production wells. Several gel formulations were identified that met the requirements--i.e., providing water residual resistance factors greater than 2,000 and ultimate oil residual resistance factors (F{sub rro}) of 2 or less. Significant oil throughput was required to achieve low F{sub rro} values, suggesting that gelant penetration into porous rock must be small (a few feet or less) for existing pore-filling gels to provide effective disproportionate permeability reduction. Compared with adsorbed polymers and weak gels, strong pore-filling gels can provide greater reliability and behavior that is insensitive to the initial rock permeability. Guidance is provided on where relative-permeability-modification/disproportionate-permeability-reduction treatments can be successfully applied for use in either oil or gas production wells. When properly designed and executed, these treatments can be successfully applied to a limited range of oilfield excessive-water-production problems. We examined whether gel rheology can explain behavior during extrusion through fractures. The rheology behavior of the gels tested showed a strong parallel to the results obtained from previous gel extrusion experiments. However, for a given aperture (fracture width or plate-plate separation), the pressure gradients measured during the gel extrusion experiments were much higher than anticipated from rheology measurements. Extensive experiments established that wall slip and first normal stress difference were not responsible for the pressure gradient discrepancy. To explain the discrepancy, we noted that the aperture for gel flow (for mobile gel wormholing through concentrated immobile

  8. Algorithm for Finding Similar Shapes in Large Molecular Structures Libraries

    Energy Science and Technology Software Center (OSTI)

    1994-10-19

    The SHAPES software consists of methods and algorithms for representing and rapidly comparing molecular shapes. Molecular shapes algorithms are a class of algorithm derived and applied for recognizing when two three-dimensional shapes share common features. They proceed from the notion that the shapes to be compared are regions in three-dimensional space. The algorithms allow recognition of when localized subregions from two or more different shapes could never be superimposed by any rigid-body motion. Rigid-body motionsmore » are arbitrary combinations of translations and rotations.« less

  9. Multipinhole collimator with 20 apertures for a brain SPECT application

    SciTech Connect (OSTI)

    Lee, Tzu-Cheng; Ellin, Justin R.; Shrestha, Uttam; Seo, Youngho; Huang, Qiu; Gullberg, Grant T.

    2014-11-01

    Purpose: Several new technologies for single photon emission computed tomography (SPECT) instrumentation with parallel-hole collimation have been proposed to improve detector sensitivity and signal collection efficiency. Benefits from improved signal efficiency include shorter acquisition times and lower dose requirements. In this paper, the authors show a possibility of over an order of magnitude enhancement in photon detection efficiency (from 7.6 × 10{sup −5} to 1.6 × 10{sup −3}) for dopamine transporter (DaT) imaging of the striatum over the conventional SPECT parallel-hole collimators by use of custom-designed 20 multipinhole (20-MPH) collimators with apertures of 0.75 cm diameter. Methods: Quantifying specific binding ratio (SBR) of {sup 123}I-ioflupane or {sup 123}I-iometopane’s signal at the striatal region is a common brain imaging method to confirm the diagnosis of the Parkinson’s disease. The authors performed imaging of a striatal phantom filled with aqueous solution of I-123 and compared camera recovery ratios of SBR acquired between low-energy high-resolution (LEHR) parallel-hole collimators and 20-MPH collimators. Results: With only two-thirds of total acquisition time (20 min against 30 min), a comparable camera recovery ratio of SBR was achieved using 20-MPH collimators in comparison to that from the LEHR collimator study. Conclusions: Their systematic analyses showed that the 20-MPH collimator could be a promising alternative for the DaT SPECT imaging for brain over the traditional LEHR collimator, which could give both shorter scan time and improved diagnostic accuracy.

  10. Coupling through tortuous path narrow slot apertures into complex cavities - Antennas and Propagation, IEEE Transactions on

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    6 IEEE TRANSACTIONS ON ANTENNAS AND PROPOGATION, VOL. 48, NO. 3, MARCH 2000 Coupling Through Tortuous Path Narrow Slot Apertures into Complex Cavities Russell P. Jedlicka, Senior Member, IEEE, Steven P. Castillo, Senior Member, IEEE, and Larry K. Warne Abstract-A hybrid finite-element method/method of moments (FEM/MOM) model has been implemented to compute the coupling of fields into a cavity through narrow slot apertures having depth. The model utilizes the slot model of Warne and Chen

  11. Find Los Alamos Publications

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Los Alamos Publications Find Los Alamos Publications Some of these resources are Lab-only and will require SSL Portal. Questions? 667-5809 Email Current Lab publications 1663 ...

  12. Inversion of synthetic aperture radar interferograms for sourcesof production-related subsidence at the Dixie Valley geothermalfield

    SciTech Connect (OSTI)

    Foxall, B.; Vasco, D.W.

    2006-07-01

    We used synthetic aperture radar interferograms to imageground subsidence that occurred over the Dixie Valley geothermal fieldduring different time intervals between 1992 and 1997. Linear elasticinversion of the subsidence that occurred between April, 1996 and March,1997 revealed that the dominant sources of deformation during this timeperiod were large changes in fluid volumes at shallow depths within thevalley fill above the reservoir. The distributions of subsidence andsubsurface volume change support a model in which reduction in pressureand volume of hot water discharging into the valley fill from localizedupflow along the Stillwater range frontal fault is caused by drawdownwithin the upflow zone resulting from geothermal production. Our resultsalso suggest that an additional source of fluid volume reduction in theshallow valley fill might be similar drawdown within piedmont faultzones. Shallow groundwater flow in the vicinity of the field appears tobe controlled on the NW by a mapped fault and to the SW by a lineament ofas yet unknown origin.

  13. Foldbelt exploration with synthetic aperture radar (SAR) in Papua New Guinea

    SciTech Connect (OSTI)

    Ellis, J.M.; Pruett, F.D.

    1987-05-01

    Synthetic aperture radar (SAR) is being successfully used within the southern fold and thrust belt of Papua New Guinea to map surface structure and stratigraphy and to help plan a hydrocarbon exploration program. The airborne SAR imagery, along with other surface data, is used as a primary exploration tool because acquisition of acceptable seismic data is extremely costly due to extensive outcrops of Tertiary Darai Limestone which develops rugged karst topography. Most anticlines in the licenses are capped with this deeply karstified limestone. The region is ideally suited to geologic analysis using remote sensing technology. The area is seldom cloud free and is covered with tropical rain forest, and geologic field studies are limited. The widespread karst terrain is exceedingly dangerous, if not impossible, to traverse on the ground. SAR is used to guide ongoing field work, modeling of subsurface structure, and selection of well locations. SAR provides their explorationists with an excellent data base because (1) structure is enhanced with low illumination, (2) resolution is 6 x 12 m, (3) digital reprocessing is possible, (4) clouds are penetrated by the SAR, and (5) the survey was designed for stereoscopic photogeology. Landsat images and vertical aerial photographs complement SAR but provide subdued structural information because of minimal shadowing (due to high sun angles) and the jungle cover. SAR imagery reveals large-scale mass wasting that has led to a reevaluation of previously acquired field data. Lithologies can be recognized by textural and tonal changes on the SAR images despite near-continuous canopy of jungle. Reprocessing and contrast stretching of the digital radar imagery provide additional geologic information.

  14. Spectral light separator based on deep-subwavelength resonant apertures in a metallic film

    SciTech Connect (OSTI)

    Bykalp, Yasin; Catrysse, Peter B. Shin, Wonseok; Fan, Shanhui

    2014-07-07

    We propose to funnel, select, and collect light spectrally by exploiting the unique properties of deep-subwavelength resonant apertures in a metallic film. In our approach, each aperture has an electromagnetic cross section that is much larger than its physical size while the frequency of the collected light is controlled by its height through the Fabry-Prot resonance mechanism. The electromagnetic crosstalk between apertures remains low despite physical separations in the deep-subwavelength range. The resulting device enables an extremely efficient, subwavelength way to decompose light into its spectral components without the loss of photons and spatial coregistration errors. As a specific example, we show a subwavelength-size structure with three deep-subwavelength slits in a metallic film designed to operate in the mid-wave infrared range between 3 and 5.5??m.

  15. Find Theses and Dissertations

    U.S. Department of Energy (DOE) all 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

  16. Find eBooks

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    eBooks Find eBooks Many of these resources are Lab-only and will require Remote Access. Question? 667-5809 Email The Library Catalog offers the most comprehensive search for scientific Ebooks. The following is a selection of Ebook sources, in case you want to search them directly. [See also Conference Proceedings.] Key eBook Providers Ebook Central information - online access to thousands of ebooks across scientific subject areas Elsevier ScienceDirect - Includes books, book series, and

  17. Polarization measurement and vertical aperture optimization for obtaining circularly polarized bend-magnet radiation

    SciTech Connect (OSTI)

    Kortright, J.B.; Rice, M.; Hussain, Z.

    1997-04-01

    Growing interest in utilizing circular polarization prompted the design of bend-magnet beamline 9.3.2 at the Advanced Light Source, covering the 30-1500 eV spectral region, to include vertical aperturing capabilities for optimizing the collection of circular polarization above and below the orbit plane. After commissioning and early use of the beamline, a multilayer polarimeter was used to characterize the polarization state of the beam as a function of vertical aperture position. This report partially summarizes the polarimetry measurements and compares results with theoretical calculations intended to simulate experimental conditions.

  18. A simple technique to reduce evaporation of crystallization droplets by using plate lids with apertures for adding liquids

    SciTech Connect (OSTI)

    Zipper, Lauren E.; Aristide, Xavier; Bishop, Dylan P.; Joshi, Ishita; Kharzeev, Julia; Patel, Krishna B.; Santiago, Brianna M.; Joshi, Karan; Dorsinvil, Kahille; Sweet, Robert M.; Soares, Alexei S.

    2014-11-28

    This article describes the use of evaporation control lids that are fitted to crystallization plates to improve the reproducibility of trials using as little as 5 nl. The plate lids contain apertures which are large enough for the transfer of protein containing droplets, but small enough to greatly reduce the rate of evaporation during the time needed to prepare the plate. A method is described for using plate lids to reduce evaporation in low-volume vapor-diffusion crystallization experiments. The plate lids contain apertures through which the protein and precipitants were added to different crystallization microplates (the reservoir was filled before fitting the lids). Plate lids were designed for each of these commonly used crystallization microplates. This system minimizes the dehydration of crystallization droplets containing just a few nanolitres of protein and precipitant, and results in more reproducible diffraction from the crystals. For each lid design, changes in the weight of the plates were used to deduce the rate of evaporation under different conditions of temperature, air movement, droplet size and precipitant. For comparison, the state of dehydration was also visually assessed throughout the experiment. Finally, X-ray diffraction methods were used to compare the diffraction of protein crystals that were conventionally prepared against those that were prepared on plates with plate lids. The measurements revealed that the plate lids reduced the rate of evaporation by 63–82%. Crystals grown in 5 nl drops that were set up with plate lids diffracted to higher resolution than similar crystals from drops that were set up without plate lids. The results demonstrate that plate lids can be instrumental for improving few-nanolitre crystallizations.

  19. Comparison of prestellar core elongations and large-scale molecular cloud structures in the Lupus I region

    SciTech Connect (OSTI)

    Poidevin, Frdrick; Ade, Peter A. R.; Hargrave, Peter C.; Nutter, David; Angile, Francesco E.; Devlin, Mark J.; Klein, Jeffrey; Benton, Steven J.; Netterfield, Calvin B.; Chapin, Edward L.; Fissel, Laura M.; Gandilo, Natalie N.; Fukui, Yasuo; Gundersen, Joshua O.; Korotkov, Andrei L.; Matthews, Tristan G.; Novak, Giles; Moncelsi, Lorenzo; Mroczkowski, Tony K.; Olmi, Luca; and others

    2014-08-10

    Turbulence and magnetic fields are expected to be important for regulating molecular cloud formation and evolution. However, their effects on sub-parsec to 100 parsec scales, leading to the formation of starless cores, are not well understood. We investigate the prestellar core structure morphologies obtained from analysis of the Herschel-SPIRE 350 ?m maps of the Lupus I cloud. This distribution is first compared on a statistical basis to the large-scale shape of the main filament. We find the distribution of the elongation position angle of the cores to be consistent with a random distribution, which means no specific orientation of the morphology of the cores is observed with respect to the mean orientation of the large-scale filament in Lupus I, nor relative to a large-scale bent filament model. This distribution is also compared to the mean orientation of the large-scale magnetic fields probed at 350 ?m with the Balloon-borne Large Aperture Telescope for Polarimetry during its 2010 campaign. Here again we do not find any correlation between the core morphology distribution and the average orientation of the magnetic fields on parsec scales. Our main conclusion is that the local filament dynamicsincluding secondary filaments that often run orthogonally to the primary filamentand possibly small-scale variations in the local magnetic field direction, could be the dominant factors for explaining the final orientation of each core.

  20. Basics of Polar-Format algorithm for processing Synthetic Aperture Radar images.

    SciTech Connect (OSTI)

    Doerry, Armin Walter

    2012-05-01

    The purpose of this report is to provide a background to Synthetic Aperture Radar (SAR) image formation using the Polar Format (PFA) processing algorithm. This is meant to be an aid to those tasked to implement real-time image formation using the Polar Format processing algorithm.

  1. Phase retrieval with the transport-of-intensity equation in an arbitrarily-shaped aperture by iterative discrete cosine transforms

    DOE PAGES-Beta [OSTI]

    Huang, Lei; Zuo, Chao; Idir, Mourad; Qu, Weijuan; Asundi, Anand

    2015-04-21

    A novel transport-of-intensity equation (TIE) based phase retrieval method is proposed with putting an arbitrarily-shaped aperture into the optical wavefield. In this arbitrarily-shaped aperture, the TIE can be solved under non-uniform illuminations and even non-homogeneous boundary conditions by iterative discrete cosine transforms with a phase compensation mechanism. Simulation with arbitrary phase, arbitrary aperture shape, and non-uniform intensity distribution verifies the effective compensation and high accuracy of the proposed method. Experiment is also carried out to check the feasibility of the proposed method in real measurement. Comparing to the existing methods, the proposed method is applicable for any types of phasemore » distribution under non-uniform illumination and non-homogeneous boundary conditions within an arbitrarily-shaped aperture, which enables the technique of TIE with hard aperture become a more flexible phase retrieval tool in practical measurements.« less

  2. Measurements with Pinhole and Coded Aperture Gamma-Ray Imaging Systems

    SciTech Connect (OSTI)

    Raffo-Caiado, Ana Claudia; Solodov, Alexander A; Abdul-Jabbar, Najeb M; Hayward, Jason P; Ziock, Klaus-Peter

    2010-01-01

    From a safeguards perspective, gamma-ray imaging has the potential to reduce manpower and cost for effectively locating and monitoring special nuclear material. The purpose of this project was to investigate the performance of pinhole and coded aperture gamma-ray imaging systems at Oak Ridge National Laboratory (ORNL). With the aid of the European Commission Joint Research Centre (JRC), radiometric data will be combined with scans from a three-dimensional design information verification (3D-DIV) system. Measurements were performed at the ORNL Safeguards Laboratory using sources that model holdup in radiological facilities. They showed that for situations with moderate amounts of solid or dense U sources, the coded aperture was able to predict source location and geometry within ~7% of actual values while the pinhole gave a broad representation of source distributions

  3. Coded aperture imaging with self-supporting uniformly redundant arrays. [Patent application

    DOE Patents [OSTI]

    Fenimore, E.E.

    1980-09-26

    A self-supporting uniformly redundant array pattern for coded aperture imaging. The invention utilizes holes which are an integer times smaller in each direction than holes in conventional URA patterns. A balance correlation function is generated where holes are represented by 1's, nonholes are represented by -1's, and supporting area is represented by 0's. The self-supporting array can be used for low energy applications where substrates would greatly reduce throughput.

  4. RF/optical shared aperture for high availability wideband communication RF/FSO links

    DOE Patents [OSTI]

    Ruggiero, Anthony J; Pao, Hsueh-yuan; Sargis, Paul

    2014-04-29

    An RF/Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.

  5. RF/optical shared aperture for high availability wideband communication RF/FSO links

    DOE Patents [OSTI]

    Ruggiero, Anthony J; Pao, Hsueh-yuan; Sargis, Paul

    2015-03-24

    An RF/Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.

  6. Method for generating small and ultra small apertures, slits, nozzles and orifices

    DOE Patents [OSTI]

    Khounsary, Ali M.

    2012-05-22

    A method and device for one or more small apertures, slits, nozzles and orifices, preferably having a high aspect ratio. In one embodiment, one or more alternating layers of sacrificial layers and blocking layers are deposited onto a substrate. Each sacrificial layer is made of a material which preferably allows a radiation to substantially pass through. Each blocking layer is made of a material which substantially blocks the radiation.

  7. Aperture lamp

    DOE Patents [OSTI]

    MacLennan, Donald A.; Turner, Brian P.

    2003-01-01

    A discharge lamp includes means for containing a light emitting fill, the fill being capable of absorbing light at one wavelength and re-emitting the light at a different wavelength, the light emitted from the fill having a first spectral power distribution in the absence of reflection of light back into the fill; means for exciting the fill to cause the fill to emit light; and means for reflecting some of the light emitted by the fill back into the fill while allowing some light to exit, the exiting light having a second spectral power distribution with proportionately more light in the visible region as compared to the first spectral power distribution, wherein the light re-emitted by the fill is shifted in wavelength with respect to the absorbed light and the magnitude of the shift is in relation to an effective optical path length. Another discharge lamp includes an envelope; a fill which emits light when excited disposed in the envelope; a source of excitation power coupled to the fill to excite the fill and cause the fill to emit light; and a reflective ceramic structure disposed around the envelope and defining an light emitting opening, wherein the structure comprises a sintered body built up directly on the envelope and made from a combination of alumina and silica.

  8. Finding of No Significant Impact

    U.S. Department of Energy (DOE) all 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.

  9. Finding of No Significant Impact

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Bonneville Power Administration Northern Mid-Columbia Joint Project Finding of No Significant Impact March 2016 Bonneville Power Administration 1 Northern Mid-Columbia Joint Project DEPARTMENT OF ENERGY Bonneville Power Administration Finding of No Significant Impact (FONSI) and Floodplain Statement of Findings DOE/EA-1945 Summary: Bonneville Power Administration (BPA) announces its environmental findings on one of the routing alternatives - West Route D-E - identified for the Northern

  10. EA-1810: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    The innovative geothermal technologies would include using a three-component long-offset surface seismic survey, permanent scatter synthetic aperture radar interferometry (PSInSAR) ...

  11. ARM - Research Highlights: Notable Findings

    U.S. Department of Energy (DOE) all 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)

  12. Ion funnel with extended mass range and reduced conductance limit aperture

    DOE Patents [OSTI]

    Tolmachev, Aleksey V.; Smith, Richard D.

    2008-04-01

    An improved ion funnel design is disclosed that decreases the axial RF (parasite) fields at the ion funnel exit. This is achieved by addition of one or more compensation electrodes after the conductance limit electrode. Various RF voltage profiles may be applied to the various electrodes minimizing the parasite axial potential wells. The smallest RF aperture that serves as the conductance limiting electrode is further reduced over standard designs. Overall, the ion funnel improves transmission ranges of both low m/z and high m/z ions, reducing RF activation of ions and decreasing the gas load to subsequent differential pumping stages.

  13. Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar

    DOE Patents [OSTI]

    Doerry, Armin W. (Albuquerque, NM); Heard, Freddie E. (Albuquerque, NM); Cordaro, J. Thomas (Albuquerque, NM)

    2008-06-24

    Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit measurement of the error. Range profiles can be compared across the slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.

  14. A parametric study of rate of advance and area coverage rate performance of synthetic aperture radar.

    SciTech Connect (OSTI)

    Raynal, Ann Marie; William H. Hensley, Jr.; Burns, Bryan L.; Doerry, Armin Walter

    2014-11-01

    The linear ground distance per unit time and ground area covered per unit time of producing synthetic aperture radar (SAR) imagery, termed rate of advance (ROA) and area coverage rate (ACR), are important metrics for platform and radar performance in surveillance applications. These metrics depend on many parameters of a SAR system such as wavelength, aircraft velocity, resolution, antenna beamwidth, imaging mode, and geometry. Often the effects of these parameters on rate of advance and area coverage rate are non-linear. This report addresses the impact of different parameter spaces as they relate to rate of advance and area coverage rate performance.

  15. All-reflective optical target illumination system with high numerical aperture

    DOE Patents [OSTI]

    Thomas, Carlton E.; Sigler, Robert D.; Hoeger, John G.

    1979-01-01

    An all-reflective optical system for providing illumination of a target focal region at high numerical aperture from a pair of confluent collimated light beams. The collimated beams are each incident upon an associated concave eccentric pupil paraboloidal reflective surface, and thereby each focused through an opening in an associated outer ellipsoidal reflective surface onto a plane reflector. Each beam is reflected by its associated plane reflector onto the opposing concave surface of the outer ellipsoids to be focused through an opening in the plane surface onto an opposing inner concave ellipsoidal reflective surface, and thence onto the target region.

  16. Find R&D Results

    U.S. Department of Energy (DOE) all 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 ...

  17. Efficiency of a multilayer-Laue-lens with a 102 μm aperture

    DOE PAGES-Beta [OSTI]

    Macrander, Albert T.; Kubec, Adam; Conley, Raymond; Bouet, Nathalie; Zhou, Juan; Wojcik, Michael; Maser, Jorg

    2015-08-25

    A multilayer-Laue-lens (MLL) comprised of WSi2/Al layers stacked to a full thickness of 102 microns was characterized for its diffraction efficiency and dynamical diffraction properties by x-ray measurements made in the far field. The achieved aperture roughly doubles the previous maximum reported aperture for an MLL, thereby doubling the working distance. Negative and positive first orders were found to have 14.2 % and 13.0 % efficiencies, respectively. A section thickness of 9.6 μm was determined from Laue-case thickness fringes in the diffraction data. A background gas consisting of 90 % Ar and 10 % N2 was used for sputtering. Thismore » material system was chosen to reduce grown-in stress as the multilayer is deposited. Although some regions of the full MLL exhibited defects, the presently reported results were obtained for a region devoid of defects. The data compare well to dynamical diffraction calculations with Coupled Wave Theory (CWT) which provided confirmation of the optical constants and densities assumed for the CWT calculations.« less

  18. Fabrication and Analysis of 150-mm-Aperture Nb3Sn MQXF Coils

    DOE PAGES-Beta [OSTI]

    Holik, E. F.; Ambrosio, G.; Anerella, M.; Bossert, R.; Cavanna, E.; Cheng, D.; Dietderich, D. R.; Ferracin, P.; Ghosh, A. K.; Bermudez, S. Izquierdo; et al

    2016-01-12

    The U.S. LHC Accelerator Research Program (LARP) and CERN are combining efforts for the HiLumi-LHC upgrade to design and fabricate 150-mm-aperture, interaction region quadrupoles with a nominal gradient of 130 T/m using Nb3Sn. To successfully produce the necessary long MQXF triplets, the HiLumi-LHC collaboration is systematically reducing risk and design modification by heavily relying upon the experience gained from the successful 120-mm-aperture LARP HQ program. First generation MQXF short (MQXFS) coils were predominately a scaling up of the HQ quadrupole design allowing comparable cable expansion during Nb3Sn formation heat treatment and increased insulation fraction for electrical robustness. A total ofmore » 13 first generation MQXFS coils were fabricated between LARP and CERN. Systematic differences in coil size, coil alignment symmetry, and coil length contraction during heat treatment are observed and likely due to slight variances in tooling and insulation/cable systems. Analysis of coil cross sections indicate that field-shaping wedges and adjacent coil turns are systematically displaced from the nominal location and the cable is expanding less than nominally designed. Lastly, a second generation MQXF coil design seeks to correct the expansion and displacement discrepancies by increasing insulation and adding adjustable shims at the coil pole and midplanes to correct allowed magnetic field harmonics.« less

  19. Simulation study of dynamic aperture with head-on beam-beam compensation in the RHIC

    SciTech Connect (OSTI)

    Luo, Y.; Fischer, W.

    2010-08-01

    In this note we summarize the calculated 10{sup 6} turn dynamic apertures with the proposed head-on beam-beam compensation in the Relativistic Heavy Ion Collider (RHIC). To compensate the head-on beam-beam effect in the RHIC 250 GeV polarized proton run, we are planning to introduce a DC electron beam with the same transverse profile as the proton beam to collide with the proton beam. Such a device to provide the electron beam is called an electron lens (e-lens). In this note we first present the optics and beam parameters and the tracking setup. Then we compare the calculated dynamic apertures without and with head-on beam-beam compensation. The effects of adjusted phase advances between IP8 and the center of e-lens and second order chromaticity correction are checked. In the end we will scan the proton and electron beam parameters with head-on beam-beam compensation.

  20. Beamlet based direct aperture optimization for MERT using a photon MLC

    SciTech Connect (OSTI)

    Henzen, D. Manser, P.; Frei, D.; Volken, W.; Born, E. J.; Joosten, A.; Lssl, K.; Aebersold, D. M.; Chatelain, C.; Fix, M. K.; Neuenschwander, H.; Stampanoni, M. F. M.

    2014-12-15

    Purpose: A beamlet based direct aperture optimization (DAO) for modulated electron radiotherapy (MERT) using photon multileaf collimator (pMLC) shaped electron fields is developed and investigated. Methods: The Swiss Monte Carlo Plan (SMCP) allows the calculation of dose distributions for pMLC shaped electron beams. SMCP is interfaced with the Eclipse TPS (Varian Medical Systems, Palo Alto, CA) which can thus be included into the inverse treatment planning process for MERT. This process starts with the import of a CT-scan into Eclipse, the contouring of the target and the organs at risk (OARs), and the choice of the initial electron beam directions. For each electron beam, the number of apertures, their energy, and initial shape are defined. Furthermore, the DAO requires dosevolume constraints for the structures contoured. In order to carry out the DAO efficiently, the initial electron beams are divided into a grid of beamlets. For each of those, the dose distribution is precalculated using a modified electron beam model, resulting in a dose list for each beamlet and energy. Then the DAO is carried out, leading to a set of optimal apertures and corresponding weights. These optimal apertures are now converted into pMLC shaped segments and the dose calculation for each segment is performed. For these dose distributions, a weight optimization process is launched in order to minimize the differences between the dose distribution using the optimal apertures and the pMLC segments. Finally, a deliverable dose distribution for the MERT plan is obtained and loaded back into Eclipse for evaluation. For an idealized water phantom geometry, a MERT treatment plan is created and compared to the plan obtained using a previously developed forward planning strategy. Further, MERT treatment plans for three clinical situations (breast, chest wall, and parotid metastasis of a squamous cell skin carcinoma) are created using the developed inverse planning strategy. The MERT plans are

  1. Find a Job | Careers | NREL

    U.S. Department of Energy (DOE) all 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

  2. Slanted annular aperture arrays as enhanced-transmission metamaterials: Excitation of the plasmonic transverse electromagnetic guided mode

    SciTech Connect (OSTI)

    Ndao, Abdoulaye; Salut, Roland; Baida, Fadi I.; Belkhir, Abderrahmane

    2013-11-18

    We present here the fabrication and the optical characterization of slanted annular aperture arrays engraved into silver film. An experimental enhanced transmission based on the excitation of the cutoff-less plasmonic guided mode of the nano-waveguides (the transmission electron microscopy mode) is demonstrated and agrees well with the theoretical predicted results. By the way, even if it is less efficient (70% → 20%), an enhanced transmission can occur at larger wavelength value (720 nm–930 nm) compared to conventional annular aperture arrays structure by correctly setting the metal thickness.

  3. Measurements of aperture and beam lifetime using movable beam scrapers in Indus-2 electron storage ring

    SciTech Connect (OSTI)

    Kumar, Pradeep; Ghodke, A. D.; Karnewar, A. K.; Holikatti, A. C.; Yadav, S.; Puntambekar, T. A.; Singh, G.; Singh, P.

    2013-12-15

    In this paper, the measurements of vertical and horizontal aperture which are available for stable beam motion in Indus-2 at beam energy 2.5 GeV using movable beam scrapers are presented. These beam scrapers are installed in one of the long straight sections in the ring. With the movement of beam scrapers towards the beam centre, the beam lifetime is measured. The beam lifetime data obtained from the movement of vertical and horizontal beam scrapers are analyzed. The contribution of beam loss due to beam-gas scattering (vacuum lifetime) and electron-electron scattering within a beam bunch (Touschek lifetime) is separated from the measured beam lifetime at different positions of the beam scrapers. Vertical and horizontal beam sizes at scrapers location are estimated from the scraper movement towards the beam centre in quantum lifetime limit and their values closely agree with measured value obtained using X-ray diagnostic beamline.

  4. Fast-neutron coded-aperture imaging of special nuclear material configurations

    SciTech Connect (OSTI)

    P. A. Hausladen; M. A. Blackston; E. Brubaker; D. L. Chichester; P. Marleau; R. J. Newby

    2012-07-01

    In the past year, a prototype fast-neutron coded-aperture imager has been developed that has sufficient efficiency and resolution to make the counting of warheads for possible future treaty confirmation scenarios via their fission-neutron emissions practical. The imager is constructed from custom-built pixelated liquid scintillator detectors. The liquid scintillator detectors enable neutron-gamma discrimination via pulse shape, and the pixelated construction enables a sufficient number of pixels for imaging in a compact detector with a manageable number of channels of readout electronics. The imager has been used to image neutron sources at ORNL, special nuclear material (SNM) sources at the Idaho National Laboratory (INL) Zero Power Physics Reactor (ZPPR) facility, and neutron source and shielding configurations at Sandia National Laboratories. This paper reports on the design and construction of the imager, characterization measurements with neutron sources at ORNL, and measurements with SNM at the INL ZPPR facility.

  5. Debris-less method and apparatus for forming apertures in hollow metallic articles

    DOE Patents [OSTI]

    Jordan, C.L.; Chodelka, E.J.

    1980-06-24

    This invention is a method for forming an aperture in a wall of a hollow metallic article without introducing metallic debris therein. In a typical operation, an annular groove is formed in an exterior portion of the wall. The groove defines an annular wall segment, and the bottom of the groove is shaped to slope downwardly away from the segment to form a tapered annular web which connects the segment to the wall. Any suitable coupling is attached to the outer face of the segment, as by welding. Pull then is applied to the coupling to effect circumferential breakage of the web, thus forming a removable single-piece wall fragment consisting of the web and segment. The fragment and the coupling member attached thereto then are removed from the wall.

  6. Polarization-dependent atomic dipole traps behind a circular aperture for neutral-atom quantum computing

    SciTech Connect (OSTI)

    Gillen-Christandl, Katharina; Copsey, Bert D.

    2011-02-15

    The neutral-atom quantum computing community has successfully implemented almost all necessary steps for constructing a neutral-atom quantum computer. We present computational results of a study aimed at solving the remaining problem of creating a quantum memory with individually addressable sites for quantum computing. The basis of this quantum memory is the diffraction pattern formed by laser light incident on a circular aperture. Very close to the aperture, the diffraction pattern has localized bright and dark spots that can serve as red-detuned or blue-detuned atomic dipole traps. These traps are suitable for quantum computing even for moderate laser powers. In particular, for moderate laser intensities ({approx}100 W/cm{sup 2}) and comparatively small detunings ({approx}1000-10 000 linewidths), trap depths of {approx}1 mK and trap frequencies of several to tens of kilohertz are achieved. Our results indicate that these dipole traps can be moved by tilting the incident laser beams without significantly changing the trap properties. We also explored the polarization dependence of these dipole traps. We developed a code that calculates the trapping potential energy for any magnetic substate of any hyperfine ground state of any alkali-metal atom for any laser detuning much smaller than the fine-structure splitting for any given electric field distribution. We describe details of our calculations and include a summary of different notations and conventions for the reduced matrix element and how to convert it to SI units. We applied this code to these traps and found a method for bringing two traps together and apart controllably without expelling the atoms from the trap and without significant tunneling probability between the traps. This approach can be scaled up to a two-dimensional array of many pinholes, forming a quantum memory with single-site addressability, in which pairs of atoms can be brought together and apart for two-qubit gates for quantum computing.

  7. QER - Comment of Large Public Power Council 2 | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Attached please find comments by the Large Public Power Council for the record regarding the April 11th QER meeting. Missy Mandell, Executive Director Large Public Power Council ...

  8. 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.

  9. 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.

  10. 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.

  11. 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.

  12. 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

  13. FINDING OF NO SIGNIFICANT IMPACT

    U.S. Department of Energy (DOE) all 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

  14. 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

  15. Final Report: Detection and Characterization of Underground Facilities by Stochastic Inversion and Modeling of Data from the New Generation of Synthetic Aperture Satellites

    SciTech Connect (OSTI)

    Foxall, W; Cunningham, C; Mellors, R; Templeton, D; Dyer, K; White, J

    2012-02-27

    Many clandestine development and production activities can be conducted underground to evade surveillance. The purpose of the study reported here was to develop a technique to detect underground facilities by broad-area search and then to characterize the facilities by inversion of the collected data. This would enable constraints to be placed on the types of activities that would be feasible at each underground site, providing a basis the design of targeted surveillance and analysis for more complete characterization. Excavation of underground cavities causes deformation in the host material and overburden that produces displacements at the ground surface. Such displacements are often measurable by a variety of surveying or geodetic techniques. One measurement technique, Interferometric Synthetic Aperture Radar (InSAR), uses data from satellite-borne (or airborne) synthetic aperture radars (SARs) and so is ideal for detecting and measuring surface displacements in denied access regions. Depending on the radar frequency and the acquisition mode and the surface conditions, displacement maps derived from SAR interferograms can provide millimeter- to centimeter-level measurement accuracy on regional and local scales at spatial resolution of {approx}1-10 m. Relatively low-resolution ({approx}20 m, say) maps covering large regions can be used for broad-area detection, while finer resolutions ({approx}1 m) can be used to image details of displacement fields over targeted small areas. Surface displacements are generally expected to be largest during or a relatively short time after active excavation, but, depending on the material properties, measurable displacement may continue at a decreasing rate for a considerable time after completion. For a given excavated volume in a given geological setting, the amplitude of the surface displacements decreases as the depth of excavation increases, while the area of the discernable displacement pattern increases. Therefore, the

  16. Development and evaluation of aperture-based complexity metrics using film and EPID measurements of static MLC openings

    SciTech Connect (OSTI)

    Götstedt, Julia; Karlsson Hauer, Anna; Bäck, Anna

    2015-07-15

    Purpose: Complexity metrics have been suggested as a complement to measurement-based quality assurance for intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT). However, these metrics have not yet been sufficiently validated. This study develops and evaluates new aperture-based complexity metrics in the context of static multileaf collimator (MLC) openings and compares them to previously published metrics. Methods: This study develops the converted aperture metric and the edge area metric. The converted aperture metric is based on small and irregular parts within the MLC opening that are quantified as measured distances between MLC leaves. The edge area metric is based on the relative size of the region around the edges defined by the MLC. Another metric suggested in this study is the circumference/area ratio. Earlier defined aperture-based complexity metrics—the modulation complexity score, the edge metric, the ratio monitor units (MU)/Gy, the aperture area, and the aperture irregularity—are compared to the newly proposed metrics. A set of small and irregular static MLC openings are created which simulate individual IMRT/VMAT control points of various complexities. These are measured with both an amorphous silicon electronic portal imaging device and EBT3 film. The differences between calculated and measured dose distributions are evaluated using a pixel-by-pixel comparison with two global dose difference criteria of 3% and 5%. The extent of the dose differences, expressed in terms of pass rate, is used as a measure of the complexity of the MLC openings and used for the evaluation of the metrics compared in this study. The different complexity scores are calculated for each created static MLC opening. The correlation between the calculated complexity scores and the extent of the dose differences (pass rate) are analyzed in scatter plots and using Pearson’s r-values. Results: The complexity scores calculated by the edge

  17. Analysis to determine the maximum dimensions of flexible apertures in sensored security netting products.

    SciTech Connect (OSTI)

    Murton, Mark; Bouchier, Francis A.; vanDongen, Dale T.; Mack, Thomas Kimball; Cutler, Robert Paul; Ross, Michael P.

    2013-08-01

    Although technological advances provide new capabilities to increase the robustness of security systems, they also potentially introduce new vulnerabilities. New capability sometimes requires new performance requirements. This paper outlines an approach to establishing a key performance requirement for an emerging intrusion detection sensor: the sensored net. Throughout the security industry, the commonly adopted standard for maximum opening size through barriers is a requirement based on square inches-typically 96 square inches. Unlike standard rigid opening, the dimensions of a flexible aperture are not fixed, but variable and conformable. It is demonstrably simple for a human intruder to move through a 96-square-inch opening that is conformable to the human body. The longstanding 96-square-inch requirement itself, though firmly embedded in policy and best practice, lacks a documented empirical basis. This analysis concluded that the traditional 96-square-inch standard for openings is insufficient for flexible openings that are conformable to the human body. Instead, a circumference standard is recommended for these newer types of sensored barriers. The recommended maximum circumference for a flexible opening should be no more than 26 inches, as measured on the inside of the netting material.

  18. On the detection of crevasses in glacial ice with synthetic-aperture radar.

    SciTech Connect (OSTI)

    Brock, Billy C.

    2010-02-01

    The intent of this study is to provide an analysis of the scattering from a crevasse in Antarctic ice, utilizing a physics-based model for the scattering process. Of primary interest is a crevasse covered with a snow bridge, which makes the crevasse undetectable in visible-light images. It is demonstrated that a crevasse covered with a snow bridge can be visible in synthetic-aperture-radar (SAR) images. The model of the crevasse and snow bridge incorporates a complex dielectric permittivity model for dry snow and ice that takes into account the density profile of the glacier. The surface structure is based on a fractal model that can produce sastrugi-like features found on the surface of Antarctic glaciers. Simulated phase histories, computed with the Shooting and Bouncing Ray (SBR) method, are processed into SAR images. The viability of the SBR method for predicting scattering from a crevasse covered with a snow bridge is demonstrated. Some suggestions for improving the model are given.

  19. A High Resolution, Light-Weight, Synthetic Aperture Radar for UAV Application

    SciTech Connect (OSTI)

    Doerry, A.W.; Hensley, W.H.; Stence, J.; Tsunoda, S.I. Pace, F.; Walker, B,C.; Woodring, M.

    1999-05-27

    (U) Sandia National Laboratories in collaboration with General Atomics (GA) has designed and built a high resolution, light-weight, Ku-band Synthetic Aperture Radar (SAR) known as "Lynx". Although Lynx can be operated on a wide variety of manned and unmanned platforms, its design is optimized for use on medium altitude Unmanned Aerial Vehicles (UAVS). In particular, it can be operated on the Predator, I-GNAT, and Prowler II platforms manufactured by GA. (U) The radar production weight is less than 120 lb and operates within a 3 GHz band from 15.2 GHz to 18.2 GHz with a peak output power of 320 W. Operating range is resolution and mode dependent but can exceed 45 km in adverse weather (4 mm/hr rain). Lynx has operator selectable resolution and is capable of 0.1 m resolution in spotlight mode and 0.3 m resolution in stripmap mode, over substantial depression angles (5 to 60 deg) and squint angles (broadside ±45 deg). Real-time Motion Compensation is implemented to allow high-quality image formation even during vehicle turns and other maneuvers.

  20. All-reflective optical target illumination system with high numerical aperture

    DOE Patents [OSTI]

    Sigler, Robert D.

    1978-01-01

    An all-reflective optical system for providing illumination of a target focal region at high numerical aperture from a pair of co-axially, confluent collimated light beams. A target cavity is defined by a pair of opposed inner ellipsoidal reflectors having respective first focal points within a target region and second focal points at a vertex opening in the opposing reflector. Outwardly of each inner reflector is the opposed combination of a spherical reflector, and an outer generally ellipsoidal reflector having an aberrated first focal point coincident with the focus of the opposing spherical reflector and a second focal point coincident with the second focal point of the opposing inner ellipsoidal reflector through a vertex opening in the spherical reflector. The confluent collimated beams are incident through vertex openings in the outer ellipsoidal reflectors onto respective opposing spherical reflectors. Each beam is reflected by the associated spherical reflector onto the opposing outer ellipsoidal reflector and focused thereby onto the opposing inner ellipsoidal reflector, and then onto the target region.

  1. Method and apparatus for reducing range ambiguity in synthetic aperture radar

    DOE Patents [OSTI]

    Kare, Jordin T.

    1999-10-26

    A modified Synthetic Aperture Radar (SAR) system with reduced sensitivity to range ambiguities, and which uses secondary receiver channels to detect the range ambiguous signals and subtract them from the signal received by the main channel. Both desired and range ambiguous signals are detected by a main receiver and by one or more identical secondary receivers. All receivers are connected to a common antenna with two or more feed systems offset in elevation (e.g., a reflector antenna with multiple feed horns or a phased array with multiple phase shift networks. The secondary receiver output(s) is (are) then subtracted from the main receiver output in such a way as to cancel the ambiguous signals while only slightly attenuating the desired signal and slightly increasing the noise in the main channel, and thus does not significantly affect the desired signal. This subtraction may be done in real time, or the outputs of the receivers may be recorded separately and combined during signal processing.

  2. 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

  3. AN IMAGE-PLANE ALGORITHM FOR JWST'S NON-REDUNDANT APERTURE MASK DATA

    SciTech Connect (OSTI)

    Greenbaum, Alexandra Z.; Pueyo, Laurent; Sivaramakrishnan, Anand; Lacour, Sylvestre

    2015-01-10

    The high angular resolution technique of non-redundant masking (NRM) or aperture masking interferometry (AMI) has yielded images of faint protoplanetary companions of nearby stars from the ground. AMI on James Webb Space Telescope (JWST)'s Near Infrared Imager and Slitless Spectrograph (NIRISS) has a lower thermal background than ground-based facilities and does not suffer from atmospheric instability. NIRISS AMI images are likely to have 90%-95% Strehl ratio between 2.77 and 4.8 μm. In this paper we quantify factors that limit the raw point source contrast of JWST NRM. We develop an analytic model of the NRM point spread function which includes different optical path delays (pistons) between mask holes and fit the model parameters with image plane data. It enables a straightforward way to exclude bad pixels, is suited to limited fields of view, and can incorporate effects such as intra-pixel sensitivity variations. We simulate various sources of noise to estimate their effect on the standard deviation of closure phase, σ{sub CP} (a proxy for binary point source contrast). If σ{sub CP} < 10{sup –4} radians—a contrast ratio of 10 mag—young accreting gas giant planets (e.g., in the nearby Taurus star-forming region) could be imaged with JWST NIRISS. We show the feasibility of using NIRISS' NRM with the sub-Nyquist sampled F277W, which would enable some exoplanet chemistry characterization. In the presence of small piston errors, the dominant sources of closure phase error (depending on pixel sampling, and filter bandwidth) are flat field errors and unmodeled variations in intra-pixel sensitivity. The in-flight stability of NIRISS will determine how well these errors can be calibrated by observing a point source. Our results help develop efficient observing strategies for space-based NRM.

  4. Active galactic nucleus and quasar science with aperture masking interferometry on the James Webb Space Telescope

    SciTech Connect (OSTI)

    Ford, K. E. Saavik; McKernan, Barry; Sivaramakrishnan, Anand; Martel, André R.; Koekemoer, Anton; Lafrenière, David; Parmentier, Sébastien

    2014-03-10

    Due to feedback from accretion onto supermassive black holes (SMBHs), active galactic nuclei (AGNs) are believed to play a key role in ΛCDM cosmology and galaxy formation. However, AGNs extreme luminosities and the small angular size of their accretion flows create a challenging imaging problem. We show that the James Webb Space Telescope's Near Infrared Imager and Slitless Spectrograph (JWST-NIRISS) Aperture Masking Interferometry (AMI) mode will enable true imaging (i.e., without any requirement of prior assumptions on source geometry) at ∼65 mas angular resolution at the centers of AGNs. This is advantageous for studying complex extended accretion flows around SMBHs and in other areas of angular-resolution-limited astrophysics. By simulating data sequences incorporating expected sources of noise, we demonstrate that JWST-NIRISS AMI mode can map extended structure at a pixel-to-pixel contrast of ∼10{sup –2} around an L = 7.5 point source, using short exposure times (minutes). Such images will test models of AGN feedback, fueling, and structure (complementary with ALMA observations), and are not currently supported by any ground-based IR interferometer or telescope. Binary point source contrast with NIRISS is ∼10{sup –4} (for observing binary nuclei in merging galaxies), significantly better than current ground-based optical or IR interferometry. JWST-NIRISS's seven-hole non-redundant mask has a throughput of 15%, and utilizes NIRISS's F277W (2.77 μm), F380M (3.8 μm), F430M (4.3 μm), and F480M (4.8 μm) filters. NIRISS's square pixels are 65 mas per side, with a field of view ∼2' × 2'. We also extrapolate our results to AGN science enabled by non-redundant masking on future 2.4 m and 16 m space telescopes working at long-UV to near-IR wavelengths.

  5. Remote optical sensing on the nanometer scale with a bowtie aperture nano-antenna on a fiber tip of scanning near-field optical microscopy

    SciTech Connect (OSTI)

    Atie, Elie M.; Xie, Zhihua; El Eter, Ali; Salut, Roland; Baida, Fadi I.; Grosjean, Thierry; Nedeljkovic, Dusan; Tannous, Tony

    2015-04-13

    Plasmonic nano-antennas have proven the outstanding ability of sensing chemical and physical processes down to the nanometer scale. Sensing is usually achieved within the highly confined optical fields generated resonantly by the nano-antennas, i.e., in contact to the nanostructures. In this paper, we demonstrate the sensing capability of nano-antennas to their larger scale environment, well beyond their plasmonic confinement volume, leading to the concept of “remote” (non contact) sensing on the nanometer scale. On the basis of a bowtie-aperture nano-antenna (BNA) integrated at the apex of a SNOM (Scanning Near-field Optical Microscopy) fiber tip, we introduce an ultra-compact, moveable, and background-free optical nanosensor for the remote sensing of a silicon surface (up to distance of 300 nm). Sensitivity of the BNA to its large scale environment is high enough to expect the monitoring and control of the spacing between the nano-antenna and a silicon surface with sub-nanometer accuracy. This work paves the way towards an alternative class of nanopositioning techniques, based on the monitoring of diffraction-free plasmon resonance, that are alternative to nanomechanical and diffraction-limited optical interference-based devices.

  6. Mars Rover finds changing rocks, surprising scientists

    U.S. Department of Energy (DOE) all 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, ...

  7. Fernald Environmental Management Project Director's Final Findings...

    Office of Environmental Management (EM)

    Environmental Protection Agency ("Ohio EPA") in Ohio Revised Code ("ORC") ... I-V. FINDINGS OF FACT The Director of the Ohio EPA has determined the following findings ...

  8. Finding Hidden Oil and Gas Reserves

    U.S. Department of Energy (DOE) all 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...

  9. Multiphase Fluid Flow in Deformable Variable-Aperture Fractures - Final Report

    SciTech Connect (OSTI)

    Detwiler, Russell

    2014-04-30

    capillary forces and redistribution of fluids. These coupled processes enhance channel formation and the potential for development of fast flow paths through fractures. (2) Dissolution in fractures subjected to normal stress can result in behaviors ranging from development of dissolution channels and rapid permeability increases to fracture healing and significant permeability decreases. The timescales associated with advective transport of dissolved ions in the fracture, mineral dissolution rates, and diffusion within the adjacent porous matrix dictate the sign and magnitude of the resulting permeability changes. Furthermore, a high-? resolution mechanistic model that couples elastic deformation of contacts and aperture-?dependent dissolution rates predicts the range of observed behaviors reasonably well. (3) ERT has potential as a tool for monitoring gas leakage in deep formations. Using probabilistic inversion methods further enhances the results by providing uncertainty estimates of inverted parameters.

  10. Large optics for the National Ignition Facility

    SciTech Connect (OSTI)

    Baisden, P.

    2015-01-12

    The National Ignition Facility (NIF) laser with its 192 independent laser beams is not only the world’s largest laser, it is also the largest optical system ever built. With its 192 independent laser beams, the NIF requires a total of 7648 large-aperture (meter-sized) optics. One of the many challenges in designing and building NIF has been to carry out the research and development on optical materials, optics design, and optics manufacturing and metrology technologies needed to achieve NIF’s high output energies and precision beam quality. This paper describes the multiyear, multi-supplier, development effort that was undertaken to develop the advanced optical materials, coatings, fabrication technologies, and associated process improvements necessary to manufacture the wide range of NIF optics. The optics include neodymium-doped phosphate glass laser amplifiers; fused silica lenses, windows, and phase plates; mirrors and polarizers with multi-layer, high-reflectivity dielectric coatings deposited on BK7 substrates; and potassium di-hydrogen phosphate crystal optics for fast optical switches, frequency conversion, and polarization rotation. Also included is a discussion of optical specifications and custom metrology and quality-assurance tools designed, built, and fielded at supplier sites to verify compliance with the stringent NIF specifications. In addition, a brief description of the ongoing program to improve the operational lifetime (i.e., damage resistance) of optics exposed to high fluence in the 351-nm (3ω) is provided.

  11. Large displacement spherical joint

    DOE Patents [OSTI]

    Bieg, Lothar F.; Benavides, Gilbert L.

    2002-01-01

    A new class of spherical joints has a very large accessible full cone angle, a property which is beneficial for a wide range of applications. Despite the large cone angles, these joints move freely without singularities.

  12. Running Large Scale Jobs

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Running Large Scale Jobs Running Large Scale Jobs Users face various challenges with running and scaling large scale jobs on peta-scale production systems. For example, certain applications may not have enough memory per core, the default environment variables may need to be adjusted, or I/O dominates run time. This page lists some available programming and run time tuning options and tips users can try on their large scale applications on Hopper for better performance. Try different compilers

  13. 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.

  14. 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.

  15. Curiosity Rover confirms existence of a large ancient lake on...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Curiosity Rover confirms existence of a large ancient lake on Mars Curiosity Rover confirms existence of a large ancient lake on Mars New findings released today in the journal ...

  16. Running Large Scale Jobs

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    try on their large scale applications on Hopper for better performance. Try different compilers and compiler options The available compilers on Hopper are PGI, Cray, Intel, GNU,...

  17. TE Connectivity Finds Answers in Tomography

    U.S. Department of Energy (DOE) all 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...

  18. National Electric Transmission Congestion Study: Preliminary Findings |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Study: Preliminary Findings National Electric Transmission Congestion Study: Preliminary Findings 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. National Electric Transmission Congestion Study: Preliminary Findings - updated presentation (908.32 KB) More Documents &

  19. Fossil Energy Word Find | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Word Find Fossil Energy Word Find Word Find (inlcuidng answer key) Fossil Energy Word Search (96.6 KB) More Documents & Publications Fossil Energy Crossword Puzzle Coal Study Guide for Elementary School Guide to Low-Emission Boiler and Combustion Equipment Selection

  20. SU-E-P-40: Dosimetric Characteristics of Field Aperture Margin Design in Stereotactic Body Radiation Therapy (SBRT)

    SciTech Connect (OSTI)

    Zhu, J

    2015-06-15

    Purpose: To characterize the dosimetric effects of field aperture margin design in Stereotactic Body Radiation Therapy (SBRT). Methods: Three artificial spherical PTVs, with diameter of 10mm, 20mm and 30mm, were created on CT images of a human body thoracic phantom. Seven non-coplanar isocentric fields were used for treatment planning. For each PTV, treatment plans with margins 0mm, 1mm, 2mm and 3mm were planned. Dosimetric comparison among plans was done considering the following parameters: prescribed isodose line for target coverage, maximum dose, mean dose as well as dose spillages of V80, V50, and V20. Results: Corresponding to aperture margins of 0mm, 1mm,2m and 3mm used in the treatment planning, the percentage of isodose line chosen for dose prescription increases from 65% to 93% for 10mm PTV, 70% to 92% for 20mm PTV, and 75% to 92% for 30mm PTV. The maximum dose decrease accordingly from 155.7% to 109.5% for 10mm PTV, 145% to 111.6% for 20mm PTV, 137% to 112.2% for 30mm PTV. The mean dose decrease from 138.% to 104.4% for 10mm PTV, 122.8% to 106.1% for 20mm PTV, 121.3% to 106% for 30mm PTV. Dose spillages (mm3) increase (V80−2.6 to 4.02, V50−4.55 to 9.3, V20–87.86 to 101.71) for 10 mm PTV, (V80−6.78 to 9.89, V50–13.46 to 20.4, V20-119.16 to 219.1) for 20 mm PTV, (V80–22.01 to 28.59, V50–41.56 to 52.66, V20-532.71 to 551.84) for 30 mm PTV. Conclusion: In SBRT treatment planning, tight field aperture margin requires prescribing dose to lower isodose line that leading to higher dose inhomogeneity and higher mean dose to PTV. Loose margin allows prescribing dose to higher isodose line, therefore improves the dose homogeneity. However, it increases dose spillages. Clinician could try different margins according to the PTV size and location of surrounding critical organs to optimize the dose delivered to the patient.

  1. SU-E-T-453: A Novel Daily QA System for Robotic Image Guided Radiosurgery with Variable Aperture Collimator

    SciTech Connect (OSTI)

    Wang, L; Nelson, B

    2014-06-01

    Purpose: A novel end-to-end system using a CCD camera and a scintillator based phantom that is capable of measuring the beam-by-beam delivery accuracy of Robotic Radiosurgery has been developed and reported in our previous work. This work investigates its application to end-to-end type daily QA for Robotic Radiosurgery (Cyberknife) with Variable Aperture Collimator (Iris). Methods: The phantom was first scanned with a CT scanner at 0.625 slice thickness and exported to the Cyberknife Muliplan (v4.6) treatment planning system. An isocentric treatment plan was created consisting of ten beams of 25 Monitor Units each using Iris apertures of 7.5, 10, 15, 20, and 25 mm. The plan was delivered six times in two days on the Cyberknife G4 system with fiducial tracking on the four metal fiducials embedded in phantom with re-positioning between the measurements. The beam vectors (X, Y, Z) are measured and compared with the plan from the machine delivery file (XML file). The Iris apertures (FWHM) were measured from the beam flux map and compared with the commissioning data. Results: The average beam positioning accuracies of the six deliveries are 0.71 0.40 mm, 0.72 0.44 mm, 0.74 0.42 mm, 0.70 0.40 mm, 0.79 0.44 mm and 0.69 0.41 mm respectively. Radiation beam width (FWHM) variations are within 0.05 mm, and they agree with the commissioning data within 0.22 mm. The delivery time for the plan is about 7 minutes and the results are given instantly. Conclusion: The experimental results agree with stated sub-millimeter delivery accuracy of Cyberknife system. Beam FWHM variations comply with the 0.2 mm accuracy of the Iris collimator at SAD. The XRV-100 system has proven to be a powerful tool in performing end-to-end type tests for Robotic Image Guided Radiosurgery Daily QA.

  2. Large Customers (DR Sellers)

    SciTech Connect (OSTI)

    Kiliccot, Sila

    2011-10-25

    State of the large customers for demand response integration of solar and wind into electric grid; openADR; CAISO; DR as a pseudo generation; commercial and industrial DR strategies; California regulations

  3. Design and Fabrication of a Single-Aperture 11T Nb3Sn Dipole Model for LHC Upgrades

    SciTech Connect (OSTI)

    Andreev, N.; Apollinari, G.; Barzi, E.; Bossert, R.; Nobrega, F.; Novitski, I.; Turrioni, D.; Yamada, R.; Zlobin, A.V.; Auchmann, B.; Karppinen, M.; /CERN

    2011-11-28

    The planned upgrade of the LHC collimation system includes additional collimators to be installed in the dispersion suppressor areas of points 2, 3 and 7. To provide the necessary longitudinal space for the collimators, a replacement of 8.33 T Nb-Ti LHC main dipoles with 11 T dipoles based on Nb{sub 3}Sn superconductor compatible with the LHC lattice and main systems is being considered. To demonstrate this possibility FNAL and CERN have started a joint program to develop a 2 m long single-aperture dipole magnet with the nominal field of 11 T at {approx}11.85 kA current and 60 mm bore. This paper describes the demonstrator magnet magnetic and mechanical designs and analysis, coil fabrication procedure. The Nb{sub 3}Sn strand and cable parameters and test results are also reported.

  4. Reservoir monitoring and characterization using satellite geodetic data: Interferometric Synthetic Aperture Radar observations from the Krechba field, Algeria

    SciTech Connect (OSTI)

    Vasco, D.W.; Ferretti, Alessandro; Novali, Fabrizio

    2008-05-01

    Deformation in the material overlying an active reservoir is used to monitor pressure change at depth. A sequence of pressure field estimates, eleven in all, allow us to construct a measure of diffusive travel time throughout the reservoir. The dense distribution of travel time values means that we can construct an exactly linear inverse problem for reservoir flow properties. Application to Interferometric Synthetic Aperture Radar (InSAR) data gathered over a CO{sub 2} injection in Algeria reveals pressure propagation along two northwest trending corridors. An inversion of the travel times indicates the existence of two northwest-trending high permeability zones. The high permeability features trend in the same direction as the regional fault and fracture zones. Model parameter resolution estimates indicate that the features are well resolved.

  5. Full aperture backscatter station imager diagnostics system for far-field imaging of laser plasma instabilities on Nova

    SciTech Connect (OSTI)

    Wilke, M.D.; Fernandez, J.C.; Berggren, R.R.; Horton, R.F.; Montgomery, D.S.; Faulkner, J.A.; Looney, L.D.; Jimerson, J.R.

    1997-01-01

    In ICF, the understanding of laser plasma scattering processes is essential for laser target coupling and for controlling the symmetry of indirect drive implosions. The existing Nova full aperture backscatter station has been useful in understanding laser plasma instabilities occurring in hohlraums by measuring the quantity, spectral distribution, and near-field spatial distributions of Brillouin and more recently Raman backscatter. Equally important is an understanding of the far-field spatial intensity distribution which could help in understanding filamentation, threshold and saturation processes. This article describes a broadband, color-corrected far-field imager and associated diagnostics capable of imaging the source of scattered light to better than 25 {mu}m resolution. Brillouin and Raman backscatter can be imaged through the Nova beam-7 focusing lens or the imager can be used like a microscope to image side scatter from other beams. {copyright} {ital 1997 American Institute of Physics.}

  6. Edge-facet pumped, multi-aperture, thin-disk laser geometry for very high average power output scaling

    DOE Patents [OSTI]

    Zapata, Luis E.

    2004-12-21

    The average power output of a laser is scaled, to first order, by increasing the transverse dimension of the gain medium while increasing the thickness of an index matched light guide proportionately. Strategic facets cut at the edges of the laminated gain medium provide a method by which the pump light introduced through edges of the composite structure is trapped and passes through the gain medium repeatedly. Spontaneous emission escapes the laser volume via these facets. A multi-faceted disk geometry with grooves cut into the thickness of the gain medium is optimized to passively reject spontaneous emission generated within the laser material, which would otherwise be trapped and amplified within the high index composite disk. Such geometry allows the useful size of the laser aperture to be increased, enabling the average laser output power to be scaled.

  7. 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.

  8. Distributed PV Interconnection: Recent Analysis Findings

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    survey of utility interconnection practices. o SEPA finds that utilities confront common challenges as they move towards more streamlined interconnection application ...

  9. Distributed PV Interconnection Recent Analysis Findings

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Thank you for joining the Distributed Generation Interconnection Collaborative ... which each will discuss recent research and analysis findings related to interconnection. ...

  10. ORISE: Forensic scientist finds truth in fingerprints

    U.S. Department of Energy (DOE) all 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...

  11. SU-E-T-593: Clinical Evaluation of Direct Aperture Optimization in Head/Neck and Prostate IMRT Treatment

    SciTech Connect (OSTI)

    Hosini, M; GALAL, M; Emam, I; Kamal, G; Algohary, M

    2014-06-01

    Purpose: To investigate the planning and dosimetric advantages of direct aperture optimization (DAO) over beam-let optimization in IMRT treatment of head and neck (H/N) and prostate cancers. Methods: Five Head and Neck as well as five prostate patients were planned using the beamlet optimizer in Elekta-Xio ver 4.6 IMRT treatment planning system. Based on our experience in beamlet IMRT optimization, PTVs in H/N plans were prescribed to 70 Gy delivered by 7 fields. While prostate PTVs were prescribed to 76 Gy with 9 fields. In all plans, fields were set to be equally spaced. All cases were re-planed using Direct Aperture optimizer in Prowess Panther ver 5.01 IMRT planning system at same configurations and dose constraints. Plans were evaluated according to ICRU criteria, number of segments, number of monitor units and planning time. Results: For H/N plans, the near maximum dose (D2) and the dose that covers 95% D95 of PTV has improved by 4% in DAO. For organs at risk (OAR), DAO reduced the volume covered by 30% (V30) in spinal cord, right parotid, and left parotid by 60%, 54%, and 53% respectively. This considerable dosimetric quality improvement achieved using 25% less planning time and lower number of segments and monitor units by 46% and 51% respectively. In DAO prostate plans, Both D2 and D95 for the PTV were improved by only 2%. The V30 of the right femur, left femur and bladder were improved by 35%, 15% and 3% respectively. On the contrary, the rectum V30 got even worse by 9%. However, number of monitor units, and number of segments decreased by 20% and 25% respectively. Moreover the planning time reduced significantly too. Conclusion: DAO introduces considerable advantages over the beamlet optimization in regards to organs at risk sparing. However, no significant improvement occurred in most studied PTVs.

  12. Lessons from Large-Scale Renewable Energy Integration Studies: Preprint

    SciTech Connect (OSTI)

    Bird, L.; Milligan, M.

    2012-06-01

    In general, large-scale integration studies in Europe and the United States find that high penetrations of renewable generation are technically feasible with operational changes and increased access to transmission. This paper describes other key findings such as the need for fast markets, large balancing areas, system flexibility, and the use of advanced forecasting.

  13. Large Group Visits

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Large Group Visits Large Group Visits All tours of the Museum are self-guided, but please schedule in advance so we can best accommodate your group. Contact Us 1350 Central Avenue (505) 667-4444 Email Let us know if you plan to bring a group of 10 or more. All tours of the Museum are self-guided, but please schedule in advance so we can best accommodate your group. Parking for buses and RVs is available on Iris Street behind the Museum off of 15th St. See attached map (pdf). Contact us at

  14. Finding the cheapest Clean power options

    SciTech Connect (OSTI)

    Casten, Thomas R.; Smith, Jeffrey A.

    2009-12-15

    Speculation about why policies favor high-cost low-carbon generation options could fill a book. Vested interests? Lack of knowledge? Industry lobbying? Cost-plus regulatory mentality? Regardless of reasons, the data show that efficient generation that uses energy twice is largely ignored. While all other generation, both clean and dirty, receives large subsidies, energy recycling is ignored. (author)

  15. Generically large nongaussianity in small multifield inflation

    SciTech Connect (OSTI)

    Bramante, Joseph

    2015-07-07

    If forthcoming measurements of cosmic photon polarization restrict the primordial tensor-to-scalar ratio to r<0.01, small field inflation will be a principal candidate for the origin of the universe. Here we show that small multifield inflation, without the hybrid mechanism, typically results in large squeezed nongaussianity. Small multifield potentials contain multiple flat field directions, often identified with the gauge invariant field directions in supersymmetric potentials. We find that unless these field directions have equal slopes, large nongaussianity arises. After identifying relevant differences between large and small two-field potentials, we demonstrate that the latter naturally fulfill the Byrnes-Choi-Hall large nongaussianity conditions. Computations of the primordial power spectrum, spectral index, and squeezed bispectrum, reveal that small two-field models which otherwise match observed primordial perturbations, produce excludably large nongaussianity if the inflatons’ field directions have unequal slopes.

  16. Detachment Faulting & Geothermal Resources - Pearl Hot Spring...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Detachment Faulting & Geothermal Resources - Pearl Hot Spring, NV Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic ...

  17. Extra-Large Memory Nodes

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Extra-Large Memory Nodes Extra-Large Memory Nodes Extra-Large Memory Nodes Overview Carver has two "extra-large" memory nodes; each node has four 8-core Intel X7550 ("Nehalem EX")...

  18. Missourian Finds New Opportunity in Energy Industry

    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. Distributed PV Interconnection Recent Analysis Findings

    U.S. Department of Energy (DOE) all 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

  20. Distributed PV Interconnection: Recent Analysis Findings

    U.S. Department of Energy (DOE) all 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,

  1. Mars Rover finds changing rocks, surprising scientists

    U.S. Department of Energy (DOE) all 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

  2. 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

  3. 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

  4. Jefferson Laboratory Findings Excite Theoreticians, Experimentatlists |

    U.S. Department of Energy (DOE) all 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

  5. Large Eddy Simulations: Where

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Eddy Simulations: Where observations and modeling collides July 18, 2015 Cascade of Models ⌅ General Circulation Models ⌅ Regional Models ⌅ Large-Eddy Simulations ⌅ Direct Numerical Simulations LES GCM vs LES History Theory What if? Using LES together with Observations Testbed LES 2 / 37 Cascade of Models General Circulation Models ⌅ Domain size: Entire Earth ⌅ Horizontal Boundary conditions: None ⌅ Horizontal grid spacing: 50km ⌅ Total number of points: about 400 ⇥ 400 ⇥ 100

  6. Meet with Large Businesses

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Meet with Large Businesses and learn about upcoming acquisitions! * Federal Energy Management Program (FEMP) * National Renewable Energy Laboratory (NREL) * Small Business Administration (SBA) * U.S. Department of Energy / Energy, Efficiency, and Renewable Energy (EERE) * U.S. Department of Energy / Golden Field Office (GFO) * Western Area Power Administration (WAPA) * Colorado Procurement Technical Assistance Center (PTAC) SMALL BUSINESS OUTREACH "Federal Contracting with Small

  7. EA-1886: Finding of No Significant Impact

    Energy.gov [DOE]

    Big Sky Regional Carbon Sequestration Partnership - Phase III: Large Volume CO2 Injection-Site Characterization, Well Drilling, and Infrastructure Development, Injection, MVA, and Site Closure, Kevin Dome, Toole County, Montana

  8. Gyrokinetic large eddy simulations

    SciTech Connect (OSTI)

    Morel, P.; Navarro, A. Banon; Albrecht-Marc, M.; Carati, D.; Merz, F.; Goerler, T.; Jenko, F.

    2011-07-15

    The large eddy simulation approach is adapted to the study of plasma microturbulence in a fully three-dimensional gyrokinetic system. Ion temperature gradient driven turbulence is studied with the GENE code for both a standard resolution and a reduced resolution with a model for the sub-grid scale turbulence. A simple dissipative model for representing the effect of the sub-grid scales on the resolved scales is proposed and tested. Once calibrated, the model appears to be able to reproduce most of the features of the free energy spectra for various values of the ion temperature gradient.

  9. Lab employee helps veterans find work

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Lab employee helps veterans find work Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue:November 2, 2016 all issues All Issues » submit Lab employee helps veterans find work Cody Nevala-Amraen recruits vets to Los Alamos. November 1, 2016 Ken and Laura McClellan traveled to the Ha-Mokuba village in Lesotho, Africa, to help build a new home for the Lecheko family. Cody Nevala-Amraen is a U.S. Marine Corps veteran who served in Iraq and

  10. A simple technique to reduce evaporation of crystallization droplets by using plate lids with apertures for adding liquids

    SciTech Connect (OSTI)

    Zipper, Lauren E.; Aristide, Xavier; Bishop, Dylan P.; Joshi, Ishita; Kharzeev, Julia; Patel, Krishna B.; Santiago, Brianna M.; Joshi, Karan; Dorsinvil, Kahille; Sweet, Robert M.; Soares, Alexei S.

    2014-11-28

    A method is described for using plate lids to reduce evaporation in low-volume vapor-diffusion crystallization experiments. The plate lids contain apertures through which the protein and precipitants were added to different crystallization microplates (the reservoir was filled before fitting the lids). Plate lids were designed for each of these commonly used crystallization microplates. This system minimizes the dehydration of crystallization droplets containing just a few nanolitres of protein and precipitant, and results in more reproducible diffraction from the crystals. For each lid design, changes in the weight of the plates were used to deduce the rate of evaporation under different conditions of temperature, air movement, droplet size and precipitant. For comparison, the state of dehydration was also visually assessed throughout the experiment. Finally, X-ray diffraction methods were used to compare the diffraction of protein crystals that were conventionally prepared against those that were prepared on plates with plate lids. The measurements revealed that the plate lids reduced the rate of evaporation by 63–82%. Crystals grown in 5 nl drops that were set up with plate lids diffracted to higher resolution than similar crystals from drops that were set up without plate lids. Ultimately, the results demonstrate that plate lids can be instrumental for improving few-nanolitre crystallizations.

  11. A simple technique to reduce evaporation of crystallization droplets by using plate lids with apertures for adding liquids

    DOE PAGES-Beta [OSTI]

    Zipper, Lauren E.; Aristide, Xavier; Bishop, Dylan P.; Joshi, Ishita; Kharzeev, Julia; Patel, Krishna B.; Santiago, Brianna M.; Joshi, Karan; Dorsinvil, Kahille; Sweet, Robert M.; et al

    2014-11-28

    A method is described for using plate lids to reduce evaporation in low-volume vapor-diffusion crystallization experiments. The plate lids contain apertures through which the protein and precipitants were added to different crystallization microplates (the reservoir was filled before fitting the lids). Plate lids were designed for each of these commonly used crystallization microplates. This system minimizes the dehydration of crystallization droplets containing just a few nanolitres of protein and precipitant, and results in more reproducible diffraction from the crystals. For each lid design, changes in the weight of the plates were used to deduce the rate of evaporation under differentmore » conditions of temperature, air movement, droplet size and precipitant. For comparison, the state of dehydration was also visually assessed throughout the experiment. Finally, X-ray diffraction methods were used to compare the diffraction of protein crystals that were conventionally prepared against those that were prepared on plates with plate lids. The measurements revealed that the plate lids reduced the rate of evaporation by 63–82%. Crystals grown in 5 nl drops that were set up with plate lids diffracted to higher resolution than similar crystals from drops that were set up without plate lids. Ultimately, the results demonstrate that plate lids can be instrumental for improving few-nanolitre crystallizations.« less

  12. Full aperture backscatter station imager (FABSI) diagnostics system for far-field imaging of laser plasma instabilities on Nova

    SciTech Connect (OSTI)

    Wilke, M.D.; Fernandez, J.C.; Berggren, R.R.; Montgomery, D.; Faulkner, J.; Looney, L.; Jimerson, J.; Horton, R.F.

    1996-06-01

    In ICF, the understanding of laser plasma scattering processes is essential for laser target coupling and in controlling the symmetry of indirect drive implosions. The existing Nova Full Aperture Backscatter Station (FABS) has been useful in understanding laser plasma instabilities occurring in hohlraums by measuring the quantity, spectral distribution and near-field spatial distributions of Brillouin and more recently Raman backscatter. Equally important is an understanding of the farfield spatial intensity distribution which provides information on density, temperature and velocity gradient distributions, and which affect capsule implosion symmetry in hohlraums. Such information could potentially help in understanding processes such as filamentation and saturation mechanism. This paper describes a broad-band, color-corrected far-field imager and associated diagnostics capable of imaging the source of scattered light to better than 25 {micro}m resolution. The imager can either image Brillouin or Raman backscatter through the Nova beam 7 focusing lens or be used like a microscope to image side scatter from other beams.

  13. The SAFT-UT (synthetic aperture focusing technique for ultrasonic testing) real-time inspection system: Operational principles and implementation

    SciTech Connect (OSTI)

    Hall, T. E.; Reid, L. D.; Doctor, S. R.

    1988-06-01

    This document provides a technical description of the real-time imaging system developed for rapid flaw detection and characterization utilizing the synthetic aperture focusing technique for ultrasonic testing (SAFT-UT). The complete fieldable system has been designed to perform inservice inspection of light-water reactor components. Software was written on a DEC LSI 11/23 computer system to control data collection. The unprocessed data is transferred to a VAX 11/730 host computer to perform data processing and image display tasks. A parallel architecture peripheral to the host computer, referred to as the Real-Time SAFT Processor, rapidly performs the SAFT processing function. From the host's point of view, this device operates on the SAFT data in such a way that one may consider it to be a specialized or SAFT array processor. A guide to SAFT-UT theory and conventions is included, along with a detailed description of the operation of the software, how to install the software, and a detailed hardware description.

  14. 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 µm) 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.

  15. Large Spectral Library Problem

    SciTech Connect (OSTI)

    Chilton, Lawrence K.; Walsh, Stephen J.

    2008-10-03

    Hyperspectral imaging produces a spectrum or vector at each image pixel. These spectra can be used to identify materials present in the image. In some cases, spectral libraries representing atmospheric chemicals or ground materials are available. The challenge is to determine if any of the library chemicals or materials exist in the hyperspectral image. The number of spectra in these libraries can be very large, far exceeding the number of spectral channels collected in the ¯eld. Suppose an image pixel contains a mixture of p spectra from the library. Is it possible to uniquely identify these p spectra? We address this question in this paper and refer to it as the Large Spectral Library (LSL) problem. We show how to determine if unique identi¯cation is possible for any given library. We also show that if p is small compared to the number of spectral channels, it is very likely that unique identi¯cation is possible. We show that unique identi¯cation becomes less likely as p increases.

  16. 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.

  17. 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.

  18. Finding a Career in Energy Efficiency

    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.

  19. Sean Large | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Sean Large Sean Large Sean Large - Intern with the Office of Energy Efficiency and Renewable Energy Most Recent Be Part of the Solution! June 22 What's Up With Fuel Cells? June 8

  20. Large Magnetization at Carbon Surfaces

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Large Magnetization at Carbon Surfaces Large Magnetization at Carbon Surfaces Print Wednesday, 31 August 2011 00:00 From organic matter to pencil lead, carbon is a versatile...

  1. Recent Progress in the Negative-Ion-Based Neutral Beam Injectors in Large Helical Device

    SciTech Connect (OSTI)

    Takeiri, Y.; Tsumori, K.; Ikeda, K.; Osakabe, M.; Nagaoka, K.; Oka, Y.; Asano, E.; Kondo, T.; Sato, M.; Shibuya, M.; Komada, S.; Kaneko, O.

    2009-03-12

    Negative-ion-based neutral beam injection (negative-NBI) system has been operated for 10 years in Large Helical Device (LHD). The injection power has been increased year by year, according to the improvement of the negative ion sources. Up to now, every injector achieves the designed injection energy and power of 180 keV-5 MW with hydrogen beams, and the total injection power exceeds 16 MW with three injectors. In the multi-round aperture grounded grid (GG), the diameter of a round aperture has been enlarged for higher GG transparency. Then, the GG heat load is reduced, as well as in the multi-slotted GG, and the voltage holding ability in the beam acceleration was improved. As a result, the beam energy is raised and the injection power is increased. To improve the anisotropic property of the beamlet convergence condition between the perpendicular and the parallel directions to the slots in the multi-slotted GG, a round-shape aperture of the steering grid (SG) has been changed to a racetrack shape. As a result, the difference of the beamlet conversion condition is much mitigated, and the injection efficiency (port-transmission efficiency) is improved, leading to 188 keV-6.4 MW injection. The Cs consumption is observed to be proportional to the tungsten evaporation from filaments. The Cs behavior is investigated with optical emission spectroscopy. During the beam extraction, the Cs recycling is dominated by Cs on the backplate, which is evaporated into the plasma by the backstreaming positive ions, and the wall surfaces should be loss regions for the supplied Cs.

  2. Lab supercomputer finds new home at UNM

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Lab supercomputer to UNM Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue:November 2, 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

  3. Large forging manufacturing process

    DOE Patents [OSTI]

    Thamboo, Samuel V.; Yang, Ling

    2002-01-01

    A process for forging large components of Alloy 718 material so that the components do not exhibit abnormal grain growth includes the steps of: a) providing a billet with an average grain size between ASTM 0 and ASTM 3; b) heating the billet to a temperature of between 1750.degree. F. and 1800.degree. F.; c) upsetting the billet to obtain a component part with a minimum strain of 0.125 in at least selected areas of the part; d) reheating the component part to a temperature between 1750.degree. F. and 1800.degree. F.; e) upsetting the component part to a final configuration such that said selected areas receive no strains between 0.01 and 0.125; f) solution treating the component part at a temperature of between 1725.degree. F. and 1750.degree. F.; and g) aging the component part over predetermined times at different temperatures. A modified process achieves abnormal grain growth in selected areas of a component where desirable.

  4. Large scale tracking algorithms.

    SciTech Connect (OSTI)

    Hansen, Ross L.; Love, Joshua Alan; Melgaard, David Kennett; Karelitz, David B.; Pitts, Todd Alan; Zollweg, Joshua David; Anderson, Dylan Z.; Nandy, Prabal; Whitlow, Gary L.; Bender, Daniel A.; Byrne, Raymond Harry

    2015-01-01

    Low signal-to-noise data processing algorithms for improved detection, tracking, discrimination and situational threat assessment are a key research challenge. As sensor technologies progress, the number of pixels will increase signi cantly. This will result in increased resolution, which could improve object discrimination, but unfortunately, will also result in a significant increase in the number of potential targets to track. Many tracking techniques, like multi-hypothesis trackers, suffer from a combinatorial explosion as the number of potential targets increase. As the resolution increases, the phenomenology applied towards detection algorithms also changes. For low resolution sensors, "blob" tracking is the norm. For higher resolution data, additional information may be employed in the detection and classfication steps. The most challenging scenarios are those where the targets cannot be fully resolved, yet must be tracked and distinguished for neighboring closely spaced objects. Tracking vehicles in an urban environment is an example of such a challenging scenario. This report evaluates several potential tracking algorithms for large-scale tracking in an urban environment.

  5. Large-Angle Anomalies in the CMB

    DOE PAGES-Beta [OSTI]

    Copi, Craig J.; Huterer, Dragan; Schwarz, Dominik J.; Starkman, Glenn D.

    2010-01-01

    We review the recently found large-scale anomalies in the maps of temperature anisotropies in the cosmic microwave background. These include alignments of the largest modes of CMB anisotropy with each other and with geometry and direction of motion of the solar ssystem, and the unusually low power at these largest scales. We discuss these findings in relation to expectation from standard inflationary cosmology, their statistical significance, the tools to study them, and the various attempts to explain them.

  6. Self-consistency tests of large-scale dynamics parameterizations...

    Office of Scientific and Technical Information (OSTI)

    In self-consistency tests based on radiative-convective equilibrium (RCE; i.e., no large-scale convergence), we find that simulations either weakly coupled or strongly coupled to ...

  7. Imaging synthetic aperture radar

    DOE Patents [OSTI]

    Burns, Bryan L.; Cordaro, J. Thomas

    1997-01-01

    A linear-FM SAR imaging radar method and apparatus to produce a real-time image by first arranging the returned signals into a plurality of subaperture arrays, the columns of each subaperture array having samples of dechirped baseband pulses, and further including a processing of each subaperture array to obtain coarse-resolution in azimuth, then fine-resolution in range, and lastly, to combine the processed subapertures to obtain the final fine-resolution in azimuth. Greater efficiency is achieved because both the transmitted signal and a local oscillator signal mixed with the returned signal can be varied on a pulse-to-pulse basis as a function of radar motion. Moreover, a novel circuit can adjust the sampling location and the A/D sample rate of the combined dechirped baseband signal which greatly reduces processing time and hardware. The processing steps include implementing a window function, stabilizing either a central reference point and/or all other points of a subaperture with respect to doppler frequency and/or range as a function of radar motion, sorting and compressing the signals using a standard fourier transforms. The stabilization of each processing part is accomplished with vector multiplication using waveforms generated as a function of radar motion wherein these waveforms may be synthesized in integrated circuits. Stabilization of range migration as a function of doppler frequency by simple vector multiplication is a particularly useful feature of the invention; as is stabilization of azimuth migration by correcting for spatially varying phase errors prior to the application of an autofocus process.

  8. 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 ...

  9. Department of Energy Helping Americans Find Alternative Fuel...

    Office of Environmental Management (EM)

    Helping Americans Find Alternative Fuel Stations Department of Energy Helping Americans Find ... to find fuel stations, post custom fueling location maps on their own websites, ...

  10. Portsmouth Site Treatment Plan Director's Final Findings and...

    Energy Savers

    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 ...

  11. 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.

  12. 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

  13. 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

  14. Look At (Search) Large Files

    Energy Science and Technology Software Center (OSTI)

    1992-07-13

    Scanning large files for information can be time consuming and expensive when using edit utilities on large mainframe computers. The reason is that editors must usually load the file into a buffer.

  15. 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.

  16. 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.

  17. Extra-Large Memory Nodes

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Extra-Large Memory Nodes Extra-Large Memory Nodes Extra-Large Memory Nodes Overview Carver has two "extra-large" memory nodes; each node has four 8-core Intel X7550 ("Nehalem EX") 2.0 GHz processors (32 cores total) and 1TB memory. These nodes are available through the queue "reg_xlmem". They can be used for interactive and batch jobs that require large amount of memory (16GB per core or more). reg_xlmem queue Please refer to the "Queues and Policies" page

  18. HOW TO FIND METAL-RICH ASTEROIDS

    SciTech Connect (OSTI)

    Harris, Alan W.; Drube, Line

    2014-04-10

    The metal content of asteroids is of great interest, not only for theories of their origins and the evolution of the solar system but, in the case of near-Earth objects (NEOs), also for impact mitigation planning and endeavors in the field of planetary resources. However, since the reflection spectra of metallic asteroids are largely featureless, it is difficult to identify them and relatively few are known. We show how data from the Wide-field Infrared Survey Explorer (WISE)/NEOWISE thermal-infrared survey and similar surveys, fitted with a simple thermal model, can reveal objects likely to be metal rich. We provide a list of candidate metal-rich NEOs. Our results imply that future infrared surveys with the appropriate instrumentation could discover many more metal-rich asteroids, providing valuable data for assessment of the impact hazard and the potential of NEOs as reservoirs of vital materials for future interplanetary space activities and, eventually perhaps, for use on Earth.

  19. Comparing range data across the slow-time dimension to correct motion measurement errors beyond the range resolution of a synthetic aperture radar

    DOE Patents [OSTI]

    Doerry, Armin W. (Albuquerque, NM); Heard, Freddie E. (Albuquerque, NM); Cordaro, J. Thomas (Albuquerque, NM)

    2010-08-17

    Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit measurement of the error. Range profiles can be compared across the slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.

  20. 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.

  1. Large Magnetization at Carbon Surfaces

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    reliably (nanotubes, graphene, bucky balls, and other fullerenes are all made of carbon), finding a way to manipulate nanosized carbon elements to become magnetic would open the...

  2. Large

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    ... at the beginning of the discharge, which could damage the detectors. The shutter has a finite opening time of 3 ms. After laser fire is given to the laser, roughly 1.25 ms are ...

  3. Buried pipelines in large fault movements

    SciTech Connect (OSTI)

    Wang, L.J.; Wang, L.R.L.

    1995-12-31

    Responses of buried pipelines in large fault movements are examined based upon a non-linear cantilever beam analogy. This analogy assumes that the pipeline in a large deflection zone behaves like a cantilever beam under a transverse-concentrated shear at the inflection point with a uniformly distributed soil pressure along the entire span. The tangent modulus approach is adopted to analyze the coupled axial force-bending moment interaction on pipeline deformations in the inelastic range. The buckling load of compressive pipeline is computed by the modified Newmark`s numerical integration scheme. Parametric studies of both tensile and compressive pipeline responses to various fault movements, pipeline/fault crossing angles, soil/pipe friction angles, buried depths, pipe diameters and thickness are investigated. It is shown by the comparisons that previous findings were unconservative.

  4. LIGHT CURVES OF 32 LARGE TRANSNEPTUNIAN OBJECTS

    SciTech Connect (OSTI)

    Benecchi, Susan D.; Sheppard, Scott S.

    2013-05-15

    We present observations of 32 primarily bright, newly discovered Transneptunian objects (TNOs) observable from the Southern Hemisphere during 39 nights of observation with the Irenee du Pont 2.5 m telescope at Las Campanas Observatory. Our dataset includes objects in all dynamical classes, but is weighted toward scattered objects. We find 15 objects for which we can fit periods and amplitudes to the data, and place light curve amplitude upper limits on the other 17 objects. Combining our sample with the larger light curve sample in the literature, we find a 3{sigma} correlation between light curve amplitude and absolute magnitude with fainter objects having larger light curve amplitudes. We looked for correlations between light curve and individual orbital properties, but did not find any statistically significant results. However, if we consider light curve properties with respect to object dynamical classification, we find statistically different distributions between the classical-scattered and classical-resonant populations at the 95.60% and 94.64% level, respectively, with the classical objects having larger amplitude light curves. The significance is 97.05% if the scattered and resonant populations are combined. The properties of binary light curves are largely consistent with the greater TNO population except in the case of tidally locked systems. All the Haumea family objects measured so far have light curve amplitudes and rotation periods {<=}10 hr, suggesting that they are not significantly different from the larger TNO population. We expect multiple factors are influencing object rotations: object size dominates light curve properties except in the case of tidal, or proportionally large collisional interactions with other TNOs, the influence of the latter being different for each TNO sub-population. We also present phase curves and colors for some of our objects.

  5. Carbon Design Studies for Large ...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    creates and evaluates innovative large blade concepts for horizontal axis wind turbines to promote designs that are more efficient aerodynamically, structurally, and economically. ...

  6. Measuring coalignment of retroreflectors with large lateral incoming-outgoing beam offset

    SciTech Connect (OSTI)

    Schütze, Daniel Sheard, Benjamin S.; Heinzel, Gerhard; Danzmann, Karsten; Farrant, David; Shaddock, Daniel A.

    2014-03-15

    A method based on phase-shifting Fizeau interferometry is presented with which retroreflectors with large incoming-outgoing beam separations can be tested. The method relies on a flat Reference Bar that is used to align two auxiliary mirrors parallel to each other to extend the aperture of the interferometer. The method is applied to measure the beam coalignment of a prototype Triple Mirror Assembly of the GRACE Follow-On Laser Ranging Interferometer, a future satellite-to-satellite tracking device for Earth gravimetry. The Triple Mirror Assembly features a lateral beam offset of incoming and outgoing beam of 600 mm, whereas the acceptance angle for the incoming beam is only about ±2 mrad. With the developed method, the beam coalignment of the prototype Triple Mirror Assembly was measured to be 9 μrad with a repeatability of below 1 μrad.

  7. 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 ...

  8. Use of Synthetic Aperture Radar (SAR) to Identify and Characterize Overwintering Areas of Fish in Ice-Covered Arctic RIvers: A Demonstration with Broad Whitefish and their Habitats in the Sagavanirktok River, Alaska

    SciTech Connect (OSTI)

    Brown, Richard S.; Duguay, Claude R.; Mueller, Robert P.; Moulton, Larry; Doucette, Peter J.; Tagestad, Jerry D.

    2010-12-01

    In northern climates, locating overwintering fish can be very challenging due to thick ice cover. Areas near the coast of the Beaufort Sea provide valuable overwintering habitat for both resident and anadromous fish species; identifying and understanding their use of overwintering areas is of special interest. Synthetic aperture radar (SAR) imagery from two spaceborne satellites was examined as an alternative to radiotelemetry for identifying anadromous fish overwintering. The presence of water and ice were sampled at 162 sites and fish were sampled at 16 of these sites. From SAR imagery alone, we successfully identified large pools inhabited by overwintering fish in the ice-covered Sagavanirktok River. In addition, the imagery was able to identify all of the larger pools (mean minimum length of 138m (range 15-470 m; SD=131)) of water located by field sampling. The effectiveness of SAR to identify these pools varied from 31% to 100%, depending on imagery polarization, the incidence angle range, and the orbit. Horizontal transmit–vertical receive (HV) polarization appeared best. The accuracy of SAR was also assessed at a finer pixel-by-pixel (30-m x30-m) scale. The best correspondence at this finer scale was obtained with an image having HV polarization. The levels of agreement ranged from 54% to 69%. The presence of broad whitefish (the only anadromous species present) was associated with salinity and pool size (estimated with SAR imagery); fish were more likely to be found in larger pools with low salinity. This research illustrates that SAR imaging has great potential for identifying under-ice overwintering areas of riverine fish. These techniques should allow managers to identify critical overwintering areas with relatively more ease and lower cost than traditional techniques.

  9. 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....

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

    U.S. Department of Energy (DOE) all 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. ...

  11. 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 ...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. 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 ...

  17. 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...

  18. 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...

  19. 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 ...

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

    U.S. Department of Energy (DOE) all 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...

  1. 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...

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

    Open Energy Information (Open El) [EERE & EIA]

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

  3. 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...

  4. 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...

  5. 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...

  6. 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...

  7. 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...

  8. 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...

  9. 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...

  10. 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,...

  11. 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...

  12. 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...

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

    U.S. Department of Energy (DOE) all 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 ...

  14. 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...

  15. 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 ...

  16. 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...

  17. 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...

  18. PPPL physicists find clue to formation of magnetic fields around...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    to form one large field. After running computer simulations on a PPPL computer named "Dawson," the scientists found that small disturbances can combine to form one large...

  19. EM Active Sites (large) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EM Active Sites (large) EM Active Sites (large) Center Map View All Maps Addthis

  20. Find your scientific document; then quickly find "more like this" at

    Office of Scientific and Technical Information (OSTI)

    Information Bridge | OSTI, US Dept of Energy Office of Scientific and Technical Information your scientific document; then quickly find "more like this" at Information Bridge Back to the OSTI News Listing for 2010 The "go to" site for Department of Energy full-text research documents has added a ''more like this" feature on the search results page. Now you can search for technical reports on your topics of interest and quickly locate related documents. The "more

  1. Large Magnetization at Carbon Surfaces

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure...

  2. 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

  3. Dose equations for shift-variant CT acquisition modes using variable pitch, tube current, and aperture, and the meaning of their associated CTDI{sub vol}

    SciTech Connect (OSTI)

    Dixon, Robert L.; Boone, John M.; Kraft, Robert A.

    2014-11-01

    Purpose: With the increasing clinical use of shift-variant CT protocols involving tube current modulation (TCM), variable pitch or pitch modulation (PM), and variable aperture a(t), the interpretation of the scanner-reported CTDI{sub vol} is called into question. This was addressed for TCM in their previous paper published by Dixon and Boone [Med. Phys. 40, 111920 (14pp.) (2013)] and is extended to PM and concurrent TCM/PM as well as variable aperture in this work. Methods: Rigorous convolution equations are derived to describe the accumulated dose distributions for TCM, PM, and concurrent TCM/PM. A comparison with scanner-reported CTDI{sub vol} formulae clearly identifies the source of their differences with the traditional CTDI{sub vol}. Dose distribution simulations using the convolution are provided for a variety of TCM and PM scenarios including a helical shuttle used for perfusion studies (as well as constant mA)all having the same scanner-reported CTDI{sub vol}. These new convolution simulations for TCM are validated by comparison with their previous discrete summations. Results: These equations show that PM is equivalent to TCM if the pitch variation p(z) is proportional to 1/i(z), where i(z) is the local tube current. The simulations show that the local dose at z depends only weakly on the local tube current i(z) or local pitch p(z) due to scatter from all other locations along z, and that the local CTDI{sub vol}(z) or CTDI{sub vol} per slice do not represent a local dose but rather only a relative i(z) or p(z). The CTDI-paradigm does not apply to shift-variant techniques and the scanner-reported CTDI{sub vol} for the same lacks physical significance and relevance. Conclusions: While the traditional CTDI{sub vol} at constant tube current and pitch conveys useful information (the peak dose at the center of the scan length), CTDI{sub vol} for shift-variant techniques (TCM or PM) conveys no useful information about the associated dose distribution it

  4. Adaptable Large Power Transformers (LPTs)

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Fact Sheet: DOE Award Selections for the Design of More Flexible and Adaptable Large Power Transformers (LPTs) As part of the Energy Department's commitment to a strong and secure power grid, DOE today announced new funding to strengthen protection of the nation's electric grid from natural and manmade hazards. More than $1.5 million will catalyze new designs of large power transformers (LPTs) which are critical to the nation's power grid and represent one of its most vulnerable components.

  5. A design study for a compact two stage in-flight separator with a high mass resolution and large acceptance

    SciTech Connect (OSTI)

    Hwang, Ji-Gwang; Kim, Eun-San; Hatanaka, Kichiji

    2015-03-15

    The rare isotope beam separator with a large angular acceptance and energy acceptance is essential for examining the characteristics of unstable nuclei and exotic nuclear reactions. Careful design, however, is required to compensate for the effects of high order aberrations induced by large aperture magnets, which are used to collect rare isotopes obtained from a high energy primary heavy-ion beam hitting a target. In order to minimize the effect of the high order aberration, the optics was based on the mirror symmetry optics, which provides smaller high order aberrations, for the separation of {sup 132}Sn produced by a fission reaction between the primary beam of {sup 238}U and a relatively thick Pb target. The designed optics provides energy acceptance (full), horizontal angular acceptance, and vertical acceptance of approximately 8%, 60 mrad, and 130 mrad, respectively.

  6. Spectral sum rules for confining large-N theories

    DOE PAGES-Beta [OSTI]

    Cherman, Aleksey; McGady, David A.; Yamazaki, Masahito

    2016-06-17

    We consider asymptotically-free four-dimensional large-$N$ gauge theories with massive fermionic and bosonic adjoint matter fields, compactified on squashed three-spheres, and examine their regularized large-$N$ confined-phase spectral sums. The analysis is done in the limit of vanishing ’t Hooft coupling, which is justified by taking the size of the compactification manifold to be small compared to the inverse strong scale Λ₋1. We find our results motivate us to conjecture some universal spectral sum rules for these large $N$ gauge theories.

  7. 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...

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

    Energy Savers

    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 ...

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

    U.S. Department of Energy (DOE) all 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 ...

  10. 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

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

    Energy Savers

    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 ...

  12. 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...

  13. 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 ...

  14. 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...

  15. Show Me the Money!: How to Find Financing, Access Incentives...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Show Me the Money: How to Find Financing, Access Incentives, and Get Projects Done Show Me the Money: How to Find Financing, Access Incentives, and Get Projects Done December 6, ...

  16. 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...

  17. 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...

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

    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...

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

    Open Energy Information (Open El) [EERE & EIA]

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

  20. 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

  1. 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...

  2. 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...

  3. The World's Largest Solar Project Finds a Home in California...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Solar Project Finds a Home in California The World's Largest Solar Project Finds a Home in ... That's the impact that the Blythe Solar Power Project is projected to have upon ...

  4. 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?

  5. 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...

  6. 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

  7. 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?

  8. 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...

  9. 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...

  10. 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...

  11. 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....

  12. 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...

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

    Energy Savers

    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 ...

  14. 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...

  15. 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...

  16. Finding and Winning Simplified Acquisitions, Part 1 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding and Winning Simplified Acquisitions, Part 1 Finding and Winning Simplified Acquisitions, Part 1 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 1 (4.41 MB) More Documents & Publications Finding and Winning Simplified Acquisitions, Part 2 Chapter 17 - Special Contracting Methods Interagency Acquisition

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    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

  18. 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

  19. 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

  20. Chunking of Large Multidimensional Arrays

    SciTech Connect (OSTI)

    Rotem, Doron; Otoo, Ekow J.; Seshadri, Sridhar

    2007-02-28

    Data intensive scientific computations as well on-lineanalytical processing applications as are done on very large datasetsthat are modeled as k-dimensional arrays. The storage organization ofsuch arrays on disks is done by partitioning the large global array intofixed size hyper-rectangular sub-arrays called chunks or tiles that formthe units of data transfer between disk and memory. Typical queriesinvolve the retrieval of sub-arrays in a manner that accesses all chunksthat overlap the query results. An important metric of the storageefficiency is the expected number of chunks retrieved over all suchqueries. The question that immediately arises is "what shapes of arraychunks give the minimum expected number of chunks over a query workload?"In this paper we develop two probabilistic mathematical models of theproblem and provide exact solutions using steepest descent and geometricprogramming methods. Experimental results, using synthetic workloads onreal life data sets, show that our chunking is much more efficient thanthe existing approximate solutions.

  1. Large Component Removal/Disposal

    SciTech Connect (OSTI)

    Wheeler, D. M.

    2002-02-27

    This paper describes the removal and disposal of the large components from Maine Yankee Atomic Power Plant. The large components discussed include the three steam generators, pressurizer, and reactor pressure vessel. Two separate Exemption Requests, which included radiological characterizations, shielding evaluations, structural evaluations and transportation plans, were prepared and issued to the DOT for approval to ship these components; the first was for the three steam generators and one pressurizer, the second was for the reactor pressure vessel. Both Exemption Requests were submitted to the DOT in November 1999. The DOT approved the Exemption Requests in May and July of 2000, respectively. The steam generators and pressurizer have been removed from Maine Yankee and shipped to the processing facility. They were removed from Maine Yankee's Containment Building, loaded onto specially designed skid assemblies, transported onto two separate barges, tied down to the barges, th en shipped 2750 miles to Memphis, Tennessee for processing. The Reactor Pressure Vessel Removal Project is currently under way and scheduled to be completed by Fall of 2002. The planning, preparation and removal of these large components has required extensive efforts in planning and implementation on the part of all parties involved.

  2. Large-bore pipe decontamination

    SciTech Connect (OSTI)

    Ebadian, M.A.

    1998-01-01

    The decontamination and decommissioning (D and D) of 1200 buildings within the US Department of Energy-Office of Environmental Management (DOE-EM) Complex will require the disposition of miles of pipe. The disposition of large-bore pipe, in particular, presents difficulties in the area of decontamination and characterization. The pipe is potentially contaminated internally as well as externally. This situation requires a system capable of decontaminating and characterizing both the inside and outside of the pipe. Current decontamination and characterization systems are not designed for application to this geometry, making the direct disposal of piping systems necessary in many cases. The pipe often creates voids in the disposal cell, which requires the pipe to be cut in half or filled with a grout material. These methods are labor intensive and costly to perform on large volumes of pipe. Direct disposal does not take advantage of recycling, which could provide monetary dividends. To facilitate the decontamination and characterization of large-bore piping and thereby reduce the volume of piping required for disposal, a detailed analysis will be conducted to document the pipe remediation problem set; determine potential technologies to solve this remediation problem set; design and laboratory test potential decontamination and characterization technologies; fabricate a prototype system; provide a cost-benefit analysis of the proposed system; and transfer the technology to industry. This report summarizes the activities performed during fiscal year 1997 and describes the planned activities for fiscal year 1998. Accomplishments for FY97 include the development of the applicable and relevant and appropriate regulations, the screening of decontamination and characterization technologies, and the selection and initial design of the decontamination system.

  3. LHC: The Large Hadron Collider

    SciTech Connect (OSTI)

    Lincoln, Don

    2015-03-04

    The Large Hadron Collider (or LHC) is the world’s most powerful particle accelerator. In 2012, scientists used data taken by it to discover the Higgs boson, before pausing operations for upgrades and improvements. In the spring of 2015, the LHC will return to operations with 163% the energy it had before and with three times as many collisions per second. It’s essentially a new and improved version of itself. In this video, Fermilab’s Dr. Don Lincoln explains both some of the absolutely amazing scientific and engineering properties of this modern scientific wonder.

  4. LHC: The Large Hadron Collider

    ScienceCinema (OSTI)

    Lincoln, Don

    2016-07-12

    The Large Hadron Collider (or LHC) is the world’s most powerful particle accelerator. In 2012, scientists used data taken by it to discover the Higgs boson, before pausing operations for upgrades and improvements. In the spring of 2015, the LHC will return to operations with 163% the energy it had before and with three times as many collisions per second. It’s essentially a new and improved version of itself. In this video, Fermilab’s Dr. Don Lincoln explains both some of the absolutely amazing scientific and engineering properties of this modern scientific wonder.

  5. How to Find Ames Laboratory | The Ames Laboratory

    U.S. Department of Energy (DOE) all 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

  6. Alternative Fuels Data Center: Minnesota School District Finds Cost

    Alternative Fuels and Advanced Vehicles Data Center

    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

  7. Find Funding | U.S. DOE Office of Science (SC)

    U.S. Department of Energy (DOE) all 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

  8. 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

  9. Portsmouth Integration Director's Final Findings and Order | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    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

  10. 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 &

  11. 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

  12. EA-2018: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2018: Finding of No Significant Impact EA-2018: Front Range-Midway Solar Interconnection Project; El Paso County, Colorado Western Area Power Administration issued a Finding of No Significant Impact on September 21, 2016, for a proposal to interconnect a proposed photovoltaic solar facility adjacent to Western's existing Midway Substation in El Paso County, Colorado. For more information on this project, see: www.energy.gov/node/1907551. DOWNLOAD DOCUMENT

  13. EA-2024: 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-2024: Finding of No Significant Impact Gap Material Plutonium - Transport, Receipt, and Processing Based on the analysis in the environmental assessment, the U.S. Department of Energy, National Nuclear Security Administration (NNSA), issued this finding of no significant impact for transporting up to 900 kilograms of plutonium from foreign countries to the Savannah River Site in South Carolina for storage and processing pending final disposition. NNSA will

  14. 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

  15. EA-1797: 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-1797: Finding of No Significant Impact Agua Caliente Solar Project in Yuma County, Arizona The Department of Energy has conducted an environmental assessment that analyzed the reasonably foreseeable environmental impacts associated with the 290 Megawatt gross output photovoltaic solar power project and associated interconnection transmission line proposed by Agua Caliente Solar, LLC in Yuma County, Arizona. Finding of No Significant Impact Department of

  16. 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

  17. Find Other Sources of EERE Funding | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Find Funding » Find Other Sources of EERE Funding Find Other Sources of EERE Funding Many financial opportunities are available besides EERE funding opportunity announcements (FOAs). Like FOAs, some are competitive, while others are non-competitive. Cooperative Research and Development Agreements (CRADAs) Formula Grants Acquisition Small Business Innovation Research (SBIR)/Small Business Technology Transfer (STTR) Awards Technology Investment Agreement (TIA) Unsolicited Proposals Cooperative

  18. Webinar Series: Presenting SEEDS Findings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Webinar Series: Presenting SEEDS Findings Webinar Series: Presenting SEEDS Findings The SunShot Solar Energy Evolution and Diffusion Studies (SEEDS) program investigates strategies for accelerating the pace of change for solar energy technologies as they are developed and deployed. In a series of three webinars, the National Renewable Energy Laboratory SEEDS research team discusses the findings and outcomes of their project. Date June 2016 Topic Financing, Incentives & Market Analysis

  19. EA-1770: Finding of No Significant Impact | Department of Energy

    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...

  20. EA-1533: Finding of No Significant Impact | Department of Energy

    Energy Savers

    EA-1533: Finding of No Significant Impact Proposed Gas Main and Distribution System Upgrade, Pantex Plant, Amarillo, Texas This environmental assessment (EA) provides sufficient ...

  1. EA-1907: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Impact EA-1907: Finding of No Significant Impact Western Plains Energy, LLC Biogas Anaerobic Digester Facility, Oakley, Kansas Based on the analysis in the Final EA and...

  2. 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 ...

  3. 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...

  4. PPPL physicists find clue to formation of magnetic fields around...

    U.S. Department of Energy (DOE) all 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...

  5. 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...

  6. DOE Issues Finding of No Significant Impact and Final Environmental...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    DOE Issues Finding of No Significant Impact and Final Environmental Assessment on Road ... impacts of building an internal road to safely ship radioactive material within ...

  7. Floodplain and Wetland Assessment and Statement of Findings

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    of Findings for Construction of a Second Full Service Access Road over Lena Gulch from South Golden Road to the National Renewable Energy Laboratory's South Table Mountain ...

  8. 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...

  9. EA-2022: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    Western issued a finding of no significant impact for the proposal. The new hydropower generator would interconnect to Western's transmission system at an existing transmission ...

  10. EA-1183: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EA-1183: Finding of No Significant Impact Coal-fired Diesel Generator University of ... the performance of a coal-fired generator at the University of Alaska, Fairbanks, ...

  11. 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...

  12. 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. ...

  13. EA-1801: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1801: Finding of No Significant Impact Granite Reliable Power Wind Project, Coos County, New Hampshire The Department of Energy is adopting an environmental assessment completed ...

  14. 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...

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

    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...

  16. 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 ...

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EA-1754: Finding of No Significant Impact Public Service Company of New Mexico, Photovoltaic Plus Battery for Simultaneous Voltage Smoothing and Peak Shifting Project,...

  18. 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,...

  19. Commercial Building Energy Asset Score: Pilot Findings and Program Update

    Energy.gov [DOE]

    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.

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

    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 ...

  1. EA-1426: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EA-1426: Finding of No Significant Impact Linac Coherent Light Source Project, Stanford ... Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center (SLAC), ...

  2. EA-1927: Finding of No Significant Impact | Department of Energy

    Energy Savers

    EA-1927: Finding of No Significant Impact Paducah Gaseous Diffusion Plant Potential Land ... the Paducah Gaseous Diffusion Plant from DOE to other entities for economic development. ...

  3. Mound Plant Director's Final Findings and Orders, October 4,...

    Office of Environmental Management (EM)

    Director's Final Findings and Orders State Ohio Agreement Type Compliance Agreement Legal Driver(s) FFCAct Scope Summary Approve the Compliance Plan Volume of the amended PSTP, ...

  4. EA-1777: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Significant Impact EA-1777: Finding of No Significant Impact Lincoln Electric's Wind Energy Project in Euclid, OH DOE prepared an environmental assessment analyzing the potential...

  5. 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...

  6. FOIA-Summary of Findings: Circumstances surrounding decisions...

    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 ...

  7. EA-1535: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EA-1535: Finding of No Significant Impact Uranium Leasing Program U.S. Department of Energy Office of Legacy Management prepared the Uranium Leasing Program Programmatic ...

  8. Oregon 401 Evaluation and Findings Checklist | Open Energy Information

    Open Energy Information (Open El) [EERE & EIA]

    401 Evaluation and Findings Checklist Jump to: navigation, search OpenEI Reference LibraryAdd to library PermittingRegulatory Guidance - Checklist: Oregon 401 Evaluation and...

  9. 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

  10. 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

  11. 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 ...

  12. 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

  13. EA-1836: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    to facilitiate installation and operations of a high-efficiency natural-gas-fired cogeneration facility - would result in no significant adverse impacts. Finding of No...

  14. 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...

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

    Office of Energy Efficiency and Renewable Energy (EERE)

    Better Buildings Residential Network Peer Exchange Call Series: Rainbows and Leprechauns: Finding Gold in Partnerships (101), March 17, 2016, call slides and discussion summary.

  16. 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...

  17. Main Page Main Page: Find energy information and data. Share...

    Open Energy Information (Open El) [EERE & EIA]

    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...

  18. Exploring Plasma Science Advances from Fusion Findings to Astrophysica...

    U.S. Department of Energy (DOE) all 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 ...

  19. *** CANCELED *** SCIENCE ON SATURDAY- "Finding a Needle in A...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    MBG Auditorium *** CANCELED *** SCIENCE ON SATURDAY- "Finding a Needle in A (Genomic) Haystack or How Can Computers Help Cure Cancer" Professor Olga G. Troyanskaya Lewis-Sigler ...

  20. 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...

  1. 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...

  2. Innovative Idaho Site Crews Find Ways to Make Waste Retrieval...

    Energy Savers

    Innovative Idaho Site Crews Find Ways to Make Waste Retrieval Safer, More Efficient Innovative ... program by Idaho Treatment Group, a cleanup contractor. "Retrieval operations ...

  3. 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 ...

  4. 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 ...

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

    Energy.gov [DOE]

    Provides an overview of how to find funding for your energy efficiency projects focusing on l-p agreements. Author: Energy Star

  6. 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...

  7. 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...

  8. 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...

  9. 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 ...

  10. Microsoft Word - Summary of RCA findings and lessons learned...

    U.S. Department of Energy (DOE) all 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...

  11. Scientist finds new way to predict heat layer troublemaker |...

    U.S. Department of Energy (DOE) all 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 ...

  12. EA-1611: Finding of No Significant Impact | Department of Energy

    Energy.gov (indexed) [DOE]

    finding of no significant impact (FONSI) for the proposed Colorado Highlands Wind Project.The FONSI describes the information Western used to determine that Western's proposal to...

  13. EA-1921: Finding of No Significant Impact | 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 Based on the evaluations in the final EA and subject to the mitigations...

  14. EA-1849: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1849: Finding of No Significant Impact Ormat Nevada Northern Nevada Geothermal Power Plant Projects: Loan Guarantee for ORMAT LLC's Tuscarora Geothermal Power Plant, Elko ...

  15. EA-1882: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Range Environmental Assessment, DOEEA-1882 (March 2011) More Documents & Publications EA-1822: Final Environmental Assessment EA-1984: Finding of No Significant Impact EA-1555...

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    No Significant Impact Sunflower Wind Project, Hebron, North Dakota September 3, 2014 EA-1984: Finding of No Significant Impact Disposition of Five Signature Properties at Idaho...

  17. 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 ...

  18. 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...

  19. EA-1846: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Recovery Act: Demonstration of CO2 Capture and Sequestration of Steam Methane Reforming Process Gas Used for Large Scale Hydrogen Production Demonstration of Carbon Dioxide...

  20. Biodetection System Developed by National Laboratory Researchers Finds Use

    National Nuclear Security Administration (NNSA)

    at Salt Lake City Olympic Games | National Nuclear Security Administration | (NNSA) Biodetection System Developed by National Laboratory Researchers Finds Use at Salt Lake City Olympic Games February 07, 2002 Biodetection System Developed by National Laboratory Researchers Finds Use at Salt Lake City Olympic Games (PDF - 0.04Mb)~

  1. LARGE BLOCK TEST STATUS REPORT

    SciTech Connect (OSTI)

    Wilder, D. G.; Blair, S. C.; Buscheck, T.; Carloson, R. C.; Lee, K.; Meike, A.; Ramirez, J. L.; Sevougian, D.

    1997-08-26

    This report is intended to serve as a status report, which essentially transmits the data that have been collected to date on the Large Block Test (LBT). The analyses of data will be performed during FY98, and then a complete report will be prepared. This status report includes introductory material that is not needed merely to transmit data but is available at this time and therefore included. As such, this status report will serve as the template for the future report, and the information is thus preserved. The United States Department of Energy (DOE) is investigatinq the suitability of Yucca Mountain (YM) as a potential site for the nation's first high-level nuclear waste repository. As shown in Fig. 1-1, the site is located about 120 km northwest of Las Vegas, Nevada, in an area of uninhabited desert.

  2. Large-Scale Information Systems

    SciTech Connect (OSTI)

    D. M. Nicol; H. R. Ammerlahn; M. E. Goldsby; M. M. Johnson; D. E. Rhodes; A. S. Yoshimura

    2000-12-01

    Large enterprises are ever more dependent on their Large-Scale Information Systems (LSLS), computer systems that are distinguished architecturally by distributed components--data sources, networks, computing engines, simulations, human-in-the-loop control and remote access stations. These systems provide such capabilities as workflow, data fusion and distributed database access. The Nuclear Weapons Complex (NWC) contains many examples of LSIS components, a fact that motivates this research. However, most LSIS in use grew up from collections of separate subsystems that were not designed to be components of an integrated system. For this reason, they are often difficult to analyze and control. The problem is made more difficult by the size of a typical system, its diversity of information sources, and the institutional complexities associated with its geographic distribution across the enterprise. Moreover, there is no integrated approach for analyzing or managing such systems. Indeed, integrated development of LSIS is an active area of academic research. This work developed such an approach by simulating the various components of the LSIS and allowing the simulated components to interact with real LSIS subsystems. This research demonstrated two benefits. First, applying it to a particular LSIS provided a thorough understanding of the interfaces between the system's components. Second, it demonstrated how more rapid and detailed answers could be obtained to questions significant to the enterprise by interacting with the relevant LSIS subsystems through simulated components designed with those questions in mind. In a final, added phase of the project, investigations were made on extending this research to wireless communication networks in support of telemetry applications.

  3. Large-area metallic photonic lattices for military applications.

    SciTech Connect (OSTI)

    Luk, Ting Shan

    2007-11-01

    In this project we developed photonic crystal modeling capability and fabrication technology that is scaleable to large area. An intelligent optimization code was developed to find the optimal structure for the desired spectral response. In terms of fabrication, an exhaustive survey of fabrication techniques that would meet the large area requirement was reduced to Deep X-ray Lithography (DXRL) and nano-imprint. Using DXRL, we fabricated a gold logpile photonic crystal in the <100> plane. For the nano-imprint technique, we fabricated a cubic array of gold squares. These two examples also represent two classes of metallic photonic crystal topologies, the connected network and cermet arrangement.

  4. Director's colloquium March 18 large hadron collider

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Director's colloquium large hadron collider Director's colloquium March 18 large hadron collider Lyndon Evans of CERN will talk about the most complex scientific instrument ever ...

  5. EV Everywhere: Find Electric Vehicle Models | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Find Electric Vehicle Models EV Everywhere: Find Electric Vehicle Models Search Car: Year: -- ALL -- Make: -- ALL -- Market Class: -- ALL -- All-Electric Range: Min -- ALL -- 10 miles 20 miles 30 miles 40 miles 50 miles 60 miles 70 miles 80 miles 90 miles 100 miles 110 miles 120 miles 130+ miles Gasoline Back-Up Available: -- ALL -- No Yes Reset To find out if a plug-in electric vehicle (EV) will work for you, use the menus to the left to sort the available EV models on the market by year, make,

  6. Multiphoton ionization of large water clusters

    SciTech Connect (OSTI)

    Apicella, B.; Li, X.; Passaro, M.; Spinelli, N.; Wang, X.

    2014-05-28

    Water clusters are multimers of water molecules held together by hydrogen bonds. In the present work, multiphoton ionization in the UV range coupled with time of flight mass spectrometry has been applied to water clusters with up to 160 molecules in order to obtain information on the electronic states of clusters of different sizes up to dimensions that can approximate the bulk phase. The dependence of ion intensities of water clusters and their metastable fragments produced by laser ionization at 355 nm on laser power density indicates a (3+1)-photon resonance-enhanced multiphoton ionization process. It also explains the large increase of ionization efficiency at 355 nm compared to that at 266 nm. Indeed, it was found, by applying both nanosecond and picosecond laser ionization with the two different UV wavelengths, that no water cluster sequences after n = 9 could be observed at 266 nm, whereas water clusters up to m/z 2000 Th in reflectron mode and m/z 3000 Th in linear mode were detected at 355 nm. The agreement between our findings on clusters of water, especially true in the range with n > 10, and reported data for liquid water supports the hypothesis that clusters above a critical dimension can approximate the liquid phase. It should thus be possible to study clusters just above 10 water molecules, for getting information on the bulk phase structure.

  7. Large-scale quasi-geostrophic magnetohydrodynamics

    SciTech Connect (OSTI)

    Balk, Alexander M.

    2014-12-01

    We consider the ideal magnetohydrodynamics (MHD) of a shallow fluid layer on a rapidly rotating planet or star. The presence of a background toroidal magnetic field is assumed, and the 'shallow water' beta-plane approximation is used. We derive a single equation for the slow large length scale dynamics. The range of validity of this equation fits the MHD of the lighter fluid at the top of Earth's outer core. The form of this equation is similar to the quasi-geostrophic (Q-G) equation (for usual ocean or atmosphere), but the parameters are essentially different. Our equation also implies the inverse cascade; but contrary to the usual Q-G situation, the energy cascades to smaller length scales, while the enstrophy cascades to the larger scales. We find the Kolmogorov-type spectrum for the inverse cascade. The spectrum indicates the energy accumulation in larger scales. In addition to the energy and enstrophy, the obtained equation possesses an extra (adiabatic-type) invariant. Its presence implies energy accumulation in the 30° sector around zonal direction. With some special energy input, the extra invariant can lead to the accumulation of energy in zonal magnetic field; this happens if the input of the extra invariant is small, while the energy input is considerable.

  8. Scientist Finds Nature and Geometry Dancing to the Same Tune...

    Office of Science (SC) [DOE]

    Scientist Finds Nature and Geometry Dancing to the Same Tune News News Home Featured Articles 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Science ...

  9. EA-1888: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    of No Significant Impact EA-1888: Finding of No Significant Impact Old Town Fuel and Fiber Proposed Demonstration-Scale Integrated Biorefinery in Old Town, MN DOE has determined...

  10. EA-2002: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    EA-2002: Finding of No Significant Impact Right-of-Way Application for the Tucson-Apache 115-kV Transmission Line, Pima County, Arizona Western Area Power Administration issued a ...

  11. EA-1772: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    The proposed action consists of constructing a road for limited year-round use with the ability for trucks traveling in opposite directions to pass. PDF icon Finding of No ...

  12. EA-1941: Finding of No Significant Impact (FONSI) | Department...

    Energy.gov (indexed) [DOE]

    Finding of No Significant Impact for proposed improvements to 13 miles of access roads for its existing 115-kV Boyer-Tillamook No. 1 Transmission Line. EA-1941-FONSI-2014.pdf ...

  13. PART THREE REMEDIAL AND CORRECTIVE ACTIONS ARTICLE XIII. FINDINGS...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    a summary of the facts upon which EPA and Ecology are proceeding for purposes of ... This Article contains findings by EPA and Ecology, and shall not be used by any person ...

  14. EA-1948: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    DOE's Western Area Power Administration issued a finding of no significant impact for a proposal to rebuild and upgrade two parallel 4.8-mile transmission lines between the Gila ...

  15. EA-1948: Revised Finding of No Significant Impact | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    On March 21, 2014, DOE's Western Area Power Administration issued a finding of no significant impact (FONSI) for a proposal to rebuild and upgrade two parallel 4.8-mile ...

  16. EA-1976: Finding of No Significant Impact | Department of Energy

    Energy Savers

    EA-1976: Finding of No Significant Impact Emera CNG, LLC Compressed Natural Gas Project, Florida Based upon the EA, DOE has determined that the Emera CNG, LLC Compressed Natural ...

  17. Unique Bioreactor Finds Algae's Sweet Spot - News Feature | NREL

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Unique Bioreactor Finds Algae's Sweet Spot February 18, 2014 Close-up photo of a vial of green algae. Enlarge image Aeration helps algae grow and helps replicate real-life ...

  18. EA-1942: Finding of No Significant Impact | Department of Energy

    Energy Savers

    DOE adopted FERC's EA and issued a Finding of No Significant Impact. PDF icon EA-1942-FONSIl2014.pdf More Documents & Publications Summary of LNG Export Applications of the Lower ...

  19. Finding Six-Figure ROI From Energy Efficiency | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Six-Figure ROI From Energy Efficiency Finding Six-Figure ROI From Energy Efficiency September 28, 2010 - 10:20am Addthis Kevin Craft What are the key facts? Recovery Act funded ...

  20. EA-1995: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    EA-1995: Finding of No Significant Impact Trestle Bay Ecosystem Restoration Project, Clatsop County, Oregon The U.S. Army Corps of Engineers prepared a Feasibility Study and EA ...

  1. Copper is Key in Burning Fat, New Study Finds

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Copper is Key in Burning Fat, New Study Finds A new study led by a Berkeley Lab scientist ... Researchers want to explore if a copper deficiency is linked to obesity and obesity ...

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Winnebago County, Illinois December 2, 2011 EA-1697: Finding of No Significant Impact Right-of-Way Maintenance in the San Joaquin Valley, California November 10, 2011 EA-1862:...

  3. DOE issues Finding of No Significant Impact on Environmental...

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    doe logo U.S. Department of Energy Idaho Operations Office Media Contact: Tim Jackson (208) 526-8484 For Immediate Release December 21, 2011 DOE issues Finding of No Significant...

  4. EA-1973: Finding of No Significant Impact and Mitigation Action...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    the project webpage. PDF icon EA-1973-FONSI-MAP-2015 More Documents & Publications EA-1973: Draft Environmental Assessment EA-1901: Finding of No Significant Impact EA-1518: Final

  5. EA-1812: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    DOE has issued a Finding of No Significant Impact (FONSI) based on the information in the Final EA, FONSI, and the Supplement Analysis (SA) prepared to address changes in the ...

  6. Indoor Thermal Factors and Symptoms in Office Workers: Findings...

    Office of Scientific and Technical Information (OSTI)

    from the U.S. EPA BASE Study Citation Details In-Document Search Title: Indoor Thermal Factors and Symptoms in Office Workers: Findings from the U.S. EPA BASE Study You ...

  7. EA-1711: Finding of No Significant Impact | Department of Energy

    Energy.gov (indexed) [DOE]

    America, Inc to construct and operate a high-volume manufacturing plant to make advanced lithium-ion cells and batteries, would result in no significant adverse impacts. Finding...

  8. EA-1964: FInding of No Significant Impact | Department of Energy

    Energy.gov (indexed) [DOE]

    13, DOE adopted the NSF EA and issued a finding of no significant impact regarding NEON Project research activities on the Oak Ridge Reservation. EA-1964-FONSI-2013.pdf More...

  9. DOE ZERH Webinar: Tour of Zero, Helping Customers Find Better...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Are you interested in helping homebuyers find a better home at a lower cost? The DOE Tour of ... This national campaign is where you come in. DOE needs Innovation partners vested in ...

  10. Portsmouth Decommissioning and Decontamination Project Director's Final Findings and Order

    Energy.gov [DOE]

    Portsmouth Decommissioning and Decontamination (D&D) Project Director's Final Findings and Order defines the steps for identifying a range of technical alternatives for the D&D and waste...

  11. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay; Ayers, Shannon Lee

    2010-08-24

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  12. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay; Ayers, Shannon Lee

    2012-10-09

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  13. Finding the Right Filling Station for Alternative Vehicles Now Easier

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Finding the Right Filling Station for Alternative Vehicles Now Easier For more information contact: e:mail: Public Affairs Golden, Colo., May 5, 1999 — A new online interactive computer program is taking the guesswork out of finding the fuel needed by the thousands of alternative vehicles on the road today in the United States. The program, called the Alternative Fuel Refueling Station Locator, was developed by the U.S. Department of Energy's (DOE) Alternative Fuels Data Center (AFDC). The AFDC

  14. Energy Department Report Finds Major Potential to Increase Clean

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Hydroelectric Power | Department of Energy Report Finds Major Potential to Increase Clean Hydroelectric Power Energy Department Report Finds Major Potential to Increase Clean Hydroelectric Power April 17, 2012 - 12:39pm Addthis Washington, D.C. -- As part of President Obama's all-out, all-of-the-above energy strategy, the Energy Department today released a renewable energy resource assessment detailing the potential to develop electric power generation at existing dams across the United

  15. EA-1488: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    8: Finding of No Significant Impact 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, Tennessee The U. S. Department of Energy has completed an Environmental Assessment (EA) [DOE/EA-1488] that evaluates the processing of uranium-233 (233U) stored at the Oak Ridge National Laboratory (ORNL) and other small quantities of similar material currently stored at other DOE sites in

  16. 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)

  17. EA-1793: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    Finding of No Significant Impact EA-1793: Finding of No Significant Impact Replacement Capability for Disposal of Remote-Handled Low-Level Radioactive Waste Generated at the Department of Energy's Idaho Site DOE prepared an environmental assessment (EA), for the Replacement Capability for the Disposal of Remote-Handled Low-Level Radioactive Waste Generated at the Department of Energy's Idaho Site to evaluate potential environmental impacts related to replacement capability options. Based on the

  18. Find Financing for Energy Efficiency Upgrades | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Commercial Buildings » Find Financing for 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 Partnerships participant. Financing need not be a barrier to improving energy efficiency in your commercial building. There are federal, state, and local and tax incentives for energy efficiency upgrades, and other financial opportunities to help you meet your energy goals. The

  19. Find Product Categories Covered by Efficiency Programs | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Products & Technologies » Energy-Efficient Products » Find Product Categories Covered by Efficiency Programs Find Product Categories Covered by Efficiency Programs Legend ★ ENERGY STAR △ FEMP Designated O EPEAT ♦ Low Standby Power X WaterSense Federal agencies are required to purchase energy-efficient products. To help buyers meet these requirements, the Federal Energy Management Program (FEMP) maintains acquisition guidance for the following product categories, which are

  20. DOE issues Finding of No Significant Impact for the Environmental

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory | Department of Energy 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 Finding of No Significant Impact for the Environmental Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory February 28, 2014 - 12:00pm

  1. DOE issues Finding of No Significant Impact for the Environmental

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory | Department of Energy DOE 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 Finding of No Significant Impact for the Environmental Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory February 28, 2014 -

  2. EA-2013: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    3: Finding of No Significant Impact EA-2013: Finding of No Significant Impact Herbicide Application at Three Substations; Imperial County (California), Maricopa and Yuma Counties (Arizona) Western Area Power Administration (Western) issued a FONSI for Western's proposed use of selected herbicides for the treatment of undesirable vegetation within three existing substations on lands administered by the Bureau of Land Management. For more information on this project, see:

  3. EA-2014: 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-2014: Finding of No Significant Impact Y-12 National Security Complex Emergency Operations Center; Oak Ridge, TN Based upon the EA, the National Nuclear Security Administration (NNSA) has determined that the Y-12 Emergency Operations Center project would not be a major Federal action significantly affecting the quality of the human environment within the meaning of NEPA. Therefore, an environmental impact statement is not required. For more information on

  4. EA-2036: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    36: Finding of No Significant Impact EA-2036: Finding of No Significant Impact Sabine Pass Liquefaction Project (design optimization); Cameron Parish, Louisiana In January 2014, the Federal Energy Regulatory Commission (FERC) issued an EA to analyze the potential environmental impacts associated with an application to amend FERC's April 2012 authorization of the Sabine Pass Liquefaction Project in order to optimize its design and operation. In April 2015, Sabine Pass Liquefaction, LLC, and

  5. EA-1321: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-1321: Finding of No Significant Impact Proposed Upgrade and Improvement of The National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York Based on the analysis in the EA, DOE has determined that the continued operation, construction, and upgrades of the National Synchrotron Light Source Complex at Brookhaven National Laboratory do not constitute a major Federal action significantly affecting the quality of the human

  6. EA-1339: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-1339: Finding of No Significant Impact Waste Disposition Activities at Paducah Site, Paducah, Kentucky DOE must continue to manage (i.e., treat, store, and dispose) and control its wastes safely, efficiently, and cost effectively in compliance with applicable federal and state laws while protecting Public health and the environment. The wastes considered in the assessment are limited to DOE's ongoing and legacy non-CERCLA waste management operations at the

  7. EA-1523: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-1523: Finding of No Significant Impact Modifications at the Strategic Petroleum Reserve's West Hackberry Raw Water Intake Structure Site, Calcasieu Parish, Louisiana The U.S. Department of Energy Strategic Petroleum Reserve (SPR) prepared an Environmental Assessment (EA) (Attachment A) in response to a proposal to modify the West Hackberry (WH) Raw Water Intake Structure (RWIS) located near Hackberry, Louisiana. Based on the results of the EA and

  8. EA-1796: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-1796: Finding of No Significant Impact Loan Guarantee to Sempra Generation for Construction of the Mesquite Solar Energy Project; Maricopa County, Arizona Summary Summary DOE's Western Area Power Administration issued a FONSI for the power purchase agreement, on behalf of the Navy, for renewable energy that would be generated by the Mesquite Solar Energy Project. Documents Available For Download EA-1796 FONSI 2015 (1.29 MB) More Documents & Publications

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Impact | Department of Energy 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 Guarantee to Cogentrix of Alamosa, LLC for Construction of the Cogentrix Solar Project Near Alamosa, Colorado For more information, contact: Ms. Sharon Thomas NEPA Document Manager U.S. Department of Energy 1000 Independence Avenue, SW, LP-10 Washington, DC 20585 Electronic mail:

  10. EA-1891: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    891: Finding of No Significant Impact EA-1891: Finding of No Significant Impact Alvey-Fairview Transmission Line Rebuild Project, Oregon Based on the information in the EA, BPA determined that the proposed action is not a major federal action significantly affecting the quality of the human environment within the meaning of NEPA. Therefore, an EIS will not be prepared and BPA is issuing this FONSI for the proposed action. EA-1891-FONSI-2014.pdf (244.47 KB) More Documents & Publications

  11. Finding new perovskite halides via machine learning (Journal Article) | DOE

    Office of Scientific and Technical Information (OSTI)

    PAGES Finding new perovskite halides via machine learning Title: Finding new perovskite halides via machine learning Advanced materials with improved properties have the potential to fuel future technological advancements. However, identification and discovery of these optimal materials for a specific application is a non-trivial task, because of the vastness of the chemical search space with enormous compositional and configurational degrees of freedom. Materials informatics provides an

  12. EA-1245: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    45: Finding of No Significant Impact EA-1245: Finding of No Significant Impact Kotzebue Wind Installation Project, Kotzebue, Alaska The U.S. Department of Energy's Golden Field Office is considering providing financial assistance to the Kotzebue Electric Association to expand its existing wind installation site near Kotzebue, Alaska. Like many rural Alaskan towns, Kotzebue uses diesel-powered generators to produce electricity, the high cost of which is currently subsidized by the Alaskan State

  13. EA-2000: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2000: Finding of No Significant Impact Proposed Land Transfer to Develop a General Aviation Airport at the East Tennessee Technology Park Heritage Center, Oak Ridge, Tennessee Oak Ridge Office of Environmental Management issued a FONSI for the proposed title transfer of property located at the East Tennessee Technology Park (ETTP) Heritage Center to the Metropolitan Knoxville Airport Authority for the purpose of constructing and operating a general aviation

  14. EA-2005: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2005: Finding of No Significant Impact Chromium Plume Control Interim Measure and Plume-Center Characterization, Los Alamos National Laboratory, Los Alamos, NM Based upon the review of the EA prepared by DOE pursuant to the requirements of the National Environmental Policy Act (NEPA), DOE has determined that the planned interim measure to control chromium plume migration while long-term corrective action remedies are evaluated and implemented would not be a

  15. EA-2005: Floodplain Statement of Findings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Floodplain Statement of Findings EA-2005: Floodplain Statement of Findings Chromium Plume Control Interim Measure and Plume-Center Characterization, Los Alamos National Laboratory, Los Alamos, NM The Department of Energy Environmental Management Los Alamos Field Office issued a Final Environmental Assessment for the Chromium Plume Control Interim Measure and Plume-Center Characterization at the Los Alamos National Laboratory, Los Alamos, New Mexico (DOE/EA-2005). A Floodplain Assessment was

  16. EA-1985: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-1985: Finding of No Significant Impact Virginia Offshore Wind Technology Advancement Project on the Atlantic Outer Continental Shelf Offshore Virginia DOE is proposing to fund Virginia Electric and Power Company's Virginia Offshore Wind Technology Advancement Project (VOWTAP). The proposed VOWTAP project consists of design, construction and operation of a 12 megawatt offshore wind facility located approximately 24 nautical miles off the coast of Virginia

  17. EA-2001: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2001: Finding of No Significant Impact Energy Efficiency Standards for New Federal Commercial and Multi-Family High-Rise Residential Buildings' Baseline Standards Update (RIN 1904-AD39) Based upon the EA, DOE has determined that revising the Federal building energy efficiency standards for commercial and multi-family high-rise residential buildings to ASHRAE 90.1-2013 would not be a major Federal action significantly affecting the quality of the human

  18. EA-2004: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2004: Finding of No Significant Impact The Seneca Nation Wind Turbine Project, Cattaraugus Territory, Erie County, New York Based upon the EA, DOE has determined that authorizing the expenditure of federal funding to the Seneca Nation of Indians to design, permit, and construct up to a 2.0 megawatt wind turbine on Tribal common lands in the Cattaraugus Territory, New York would not be a major Federal action significantly affecting the quality of the human

  19. EA-2017: Finding of No Significant Impact | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Finding of No Significant Impact EA-2017: Finding of No Significant Impact Braddock Locks and Dam Hydro Electric Project Based upon the review of the EA prepared by the Federal Energy Regulatory Commission (FERC) and adopted by DOE pursuant to the requirements of the National Environmental Policy Act (NEPA), DOE has determined that authorizing the expenditure of federal funding to Hydro Green Energy, LLC to fabricate, install, and operate one interchangeable Modular Bulb Turbine (MBT), which

  20. NERSC Resources Help Find Roots of MJO Modeling Mismatches

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    NERSC Resources Help Find Roots of MJO Modeling Mismatches NERSC Resources Help Find Roots of MJO Modeling Mismatches April 18, 2016 MJOmodeling From Calcutta, India, to Seattle, Wash. and beyond, the MJO can bring storms and plenty of rain in wet years. PNNL researchers are using field data and NERSC supercomputers to better model how the MJO operates and understand its interaction regional weather systems around the world. Image: PNNL An Alaska-sized pulse of clouds and precipitation

  1. Neutrons find "missing" magnetism of plutonium

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Neutrons find "missing" magnetism of plutonium Neutrons find "missing" magnetism of plutonium Groundbreaking work at two Department of Energy national laboratories has confirmed plutonium's magnetism, which scientists have long theorized but have never been able to experimentally observe. July 10, 2015 Doug Abernathy, left, ARCS instrument scientist at Oak Ridge National Laboratory, and Marc Janoschek, Los Alamos National Laboratory, prepare their sample for experiments at

  2. Finding new perovskite halides via machine learning (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Finding new perovskite halides via machine learning Citation Details In-Document Search Title: Finding new perovskite halides via machine learning Advanced materials with improved properties have the potential to fuel future technological advancements. However, identification and discovery of these optimal materials for a specific application is a non-trivial task, because of the vastness of the chemical search space with enormous compositional and configurational degrees of

  3. From pandemic preparedness to biofuel production: Tobacco finds its

    Office of Scientific and Technical Information (OSTI)

    biotechnology niche in North America (Journal Article) | DOE PAGES From pandemic preparedness to biofuel production: Tobacco finds its biotechnology niche in North America Title: From pandemic preparedness to biofuel production: Tobacco finds its biotechnology niche in North America As part of my NSD Innovation awarded funds (95470 Powell Innovation: charge code N38540) one my deliverables was a review article for journal submission summarizing my work on this project. My NSD Innovation

  4. Study finds surprising variability in shape of Van Allen Belts

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Study finds surprising variability in shape of Van Allen Belts Study finds surprising variability in shape of Van Allen Belts Understanding the shape and size of the belts, which shrink and swell in response to magnetic storms coming from the sun, is crucial for protecting our technology in space. February 23, 2016 1. The traditional idea of the radiation belts includes a larger, more dynamic outer belt and a smaller, more stable inner belt with an empty slot region separating the two. However,

  5. Two Independent Assessments Find the Department of Energy's Yucca Mountain

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Project is on Track | Department of Energy Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track Two Independent Assessments Find the Department of Energy's Yucca Mountain Project is on Track December 13, 2007 - 4:44pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) Director of the Office of Civilian Radioactive Waste Management (OCRWM) today released two independent assessments addressing areas critical to the overall success of the Yucca

  6. Find EERE Funding Opportunity Announcements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Find EERE Funding Opportunity Announcements Find EERE Funding Opportunity Announcements Most EERE awards are selected competitively through funding opportunity announcements (FOAs) and solicitations. Competition ensures that EERE selects awards based on merit, which results in better award outcomes. All FOAs, both open and closed, are posted on two primary websites. Graphic of two circles that connect with grants.gov and EERE Exchange text. Grants.gov Grants.gov is a comprehensive website that

  7. Curiosity rover finds evidence of Mars' primitive continental crust

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Curiosity rover finds evidence of Mars' primitive continental crust Curiosity rover finds evidence of Mars' primitive continental crust This is the first discovery of a potential "continental crust" on Mars. July 13, 2015 Igneous clast named Harrison embedded in a conglomerate rock in Gale crater, Mars, shows elongated light-toned feldspar crystals. The mosaic merges an image from Mastcam with higher-resolution images from ChemCam's Remote Micro-Imager. Credit:

  8. CREED: Helping Colorado Cleantech Startups Find the Money - News Releases |

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    NREL CREED: Helping Colorado Cleantech Startups Find the Money January 19, 2012 The Colorado Center for Renewable Energy Economic Development (CREED) at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) invites cleantech entrepreneurs to attend the next event in its Entrepreneur Series. The Jan. 26 class, "Financing Your Cleantech Startup," will provide cleantech entrepreneurs with an overview of how to find capital for a startup. "If you are in

  9. Curved track segment finding using Tiny Triplet Finder (TTF)

    SciTech Connect (OSTI)

    Wu, Jin-Yuan; Wang, M.; Gottschalk, E.; Shi, Z.; /Fermilab

    2006-11-01

    We describe the applications of a track segment recognition scheme called the Tiny Triplet Finder (TTF) that involves the grouping of three hits satisfying a constraint forming of a track segment. The TTF was originally developed solving straight track segment finding problem, however, it is also suitable in many curved track segment finding problems. The examples discussed in this document are among popular detector layouts in high-energy/nuclear physics experiments. Although it is not practical to find a universal recipe for arbitrary detector layouts, the method of the TTF application is illustrated via the discussion of the examples. Generally speaking, whenever the data item to be found in a pattern recognition problem contains two free parameters, and if the constraint connecting the measurements and the two free parameters has an approximate shift invariant property, the Tiny Triplet Finder can be used.

  10. Analysis of Large- Capacity Water Heaters in Electric Thermal Storage Programs

    SciTech Connect (OSTI)

    Cooke, Alan L.; Anderson, David M.; Winiarski, David W.; Carmichael, Robert T.; Mayhorn, Ebony T.; Fisher, Andrew R.

    2015-03-17

    This report documents a national impact analysis of large tank heat pump water heaters (HPWH) in electric thermal storage (ETS) programs and conveys the findings related to concerns raised by utilities regarding the ability of large-tank heat pump water heaters to provide electric thermal storage services.

  11. Curiosity rover finds weird 'egg rock' meteorite on Mars

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Curiosity rover finds weird 'egg rock' meteorite on Mars Curiosity rover finds weird 'egg rock' meteorite on Mars NASA's Mars rover Curiosity stumbled upon a dark grey, golf-ball-size object last week that looks nothing like the typical red-orange rocks that are normally seen on Mars. November 7, 2016 Copperhead Snake on Dead Leaves, watercolor by Abbott Handerson Thayer (1849-1921) This dark, lumpy, golf ball-size object is an iron-nickel meteorite. NASA's Curiosity rover discovered it on Mars

  12. Finding & Sharing Information about Energy Efficiency | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Finding & Sharing Information about Energy Efficiency Finding & Sharing Information about Energy Efficiency June 29, 2011 - 12:27pm Addthis Drew Bittner Writer/Editor, Office of Energy Efficiency and Renewable Energy Vacation time should be relaxing, but it's often just a different kind of work. Doesn't mean it isn't fun but I seem to come home from vacation more tired than when I left. This past week was spent on the Gulf Coast, where my mother turned 81. One of my goals was

  13. NREL Study Finds Barotrauma Not Guilty | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Study Finds Barotrauma Not Guilty NREL Study Finds Barotrauma Not Guilty January 10, 2013 - 3:18pm Addthis This is an excerpt from the Fourth Quarter 2012 edition of the Wind Program R&D Newsletter. For years scientists have hypothesized that the increasing number of bat fatalities in wind farms is due to barotrauma-related injuries. But according to a study presented by the National Renewable Energy Laboratory (NREL) at the ninth biennial Wind Wildlife Research Meeting in Denver, Colorado,

  14. Development of the large neutron imaging system for inertial confinement fusion experiments

    SciTech Connect (OSTI)

    Caillaud, T.; Landoas, O.; Briat, M.; Kime, S.; Rosse, B.; Thfoin, I.; Bourgade, J. L.; Disdier, L.; Glebov, V. Yu.; Marshall, F. J.; Sangster, T. C.

    2012-03-15

    Inertial confinement fusion (ICF) requires a high resolution ({approx}10 {mu}m) neutron imaging system to observe deuterium and tritium (DT) core implosion asymmetries. A new large (150 mm entrance diameter: scaled for Laser MegaJoule [P. A. Holstein, F. Chaland, C. Charpin, J. M. Dufour, H. Dumont, J. Giorla, L. Hallo, S. Laffite, G. Malinie, Y. Saillard, G. Schurtz, M. Vandenboomgaerde, and F. Wagon, Laser and Particle Beams 17, 403 (1999)]) neutron imaging detector has been developed for such ICF experiments. The detector has been fully characterized using a linear accelerator and a {sup 60}Co {gamma}-ray source. A penumbral aperture was used to observe DT-gas-filled target implosions performed on the OMEGA laser facility. [T. R. Boehly, D. L. Brown, R. S. Craxton, R. L. Keck, J. P. Knauer, J. H. Kelly, T. J. Kessler, S. A. Kumpan, S. J. Loucks, S. A. Letzring, F. J. Marshall, R. L. McCrory, S. F. B. Morse, W. Seka, J. M. Soures, and C. P. Verdon, Opt. Commun. 133, 495 (1997)] Neutron core images of 14 MeV with a resolution of 15 {mu}m were obtained and are compared to x-ray images of comparable resolution.

  15. Finding the needle in the haystack: Algorithms for conformational optimization

    SciTech Connect (OSTI)

    Andricioaei, I.; Straub, J.E.

    1996-09-01

    Algorithms are given for comformational optimization of proteins. The protein folding problems is regarded as a problem of global energy mimimization. Since proteins have hundreds of atoms, finding the lowest-energy conformation in a many-dimensional configuration space becomes a computationally demanding problem.{copyright} {ital American Institute of Physics.}

  16. Managing Large Capital Projects | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Managing Large Capital Projects Managing Large Capital Projects Presentation from the 2015 DOE National Cleanup Workshop by Ken Picha, Deputy Assistant Secretary for Tank Waste and Nuclear Material, Office of Environmental Management. Managing Large Capital Projects (1.29 MB) More Documents & Publications Waste Treatment Plant Project Construction of Salt Waste Processing Facility (SWPF) 2013 Congressional Nuclear Cleanup Caucus Briefings

  17. Large-Scale Renewable Energy Guide Webinar

    Energy.gov [DOE]

    Webinar introduces the “Large Scale Renewable Energy Guide." The webinar will provide an overview of this important FEMP guide, which describes FEMP's approach to large-scale renewable energy projects and provides guidance to Federal agencies and the private sector on how to develop a common process for large-scale renewable projects.

  18. Frequent Subgraph Discovery in Large Attributed Streaming Graphs

    SciTech Connect (OSTI)

    Ray, Abhik; Holder, Larry; Choudhury, Sutanay

    2014-08-13

    The problem of finding frequent subgraphs in large dynamic graphs has so far only consid- ered a dynamic graph as being represented by a series of static snapshots taken at various points in time. This representation of a dynamic graph does not lend itself well to real time processing of real world graphs like social networks or internet traffic which consist of a stream of nodes and edges. In this paper we propose an algorithm that discovers the frequent subgraphs present in a graph represented by a stream of labeled nodes and edges. Our algorithm is efficient and consists of tunable parameters that can be tuned by the user to get interesting patterns from various kinds of graph data. In our model updates to the graph arrive in the form of batches which contain new nodes and edges. Our algorithm con- tinuously reports the frequent subgraphs that are estimated to be found in the entire graph as each batch arrives. We evaluate our system using 5 large dynamic graph datasets: the Hetrec 2011 challenge data, Twitter, DBLP and two synthetic. We evaluate our approach against two popular large graph miners, i.e., SUBDUE and GERM. Our experimental re- sults show that we can find the same frequent subgraphs as a non-incremental approach applied to snapshot graphs, and in less time.

  19. Finding Chemical Reaction Paths with a Multilevel Preconditioning Protocol

    SciTech Connect (OSTI)

    Kale, Seyit; Sode, Olaseni; Weare, Jonathan; Dinner, Aaron R.

    2014-11-07

    Finding transition paths for chemical reactions can be computationally costly owing to the level of quantum-chemical theory needed for accuracy. Here, we show that a multilevel preconditioning scheme that was recently introduced (Tempkin et al. J. Chem. Phys. 2014, 140, 184114) can be used to accelerate quantum-chemical string calculations. We demonstrate the method by finding minimum-energy paths for two well-characterized reactions: tautomerization of malonaldehyde and Claissen rearrangement of chorismate to prephanate. For these reactions, we show that preconditioning density functional theory (DFT) with a semiempirical method reduces the computational cost for reaching a converged path that is an optimum under DFT by several fold. In conclusion, the approach also shows promise for free energy calculations when thermal noise can be controlled.

  20. Finding Chemical Reaction Paths with a Multilevel Preconditioning Protocol

    DOE PAGES-Beta [OSTI]

    Kale, Seyit; Sode, Olaseni; Weare, Jonathan; Dinner, Aaron R.

    2014-11-07

    Finding transition paths for chemical reactions can be computationally costly owing to the level of quantum-chemical theory needed for accuracy. Here, we show that a multilevel preconditioning scheme that was recently introduced (Tempkin et al. J. Chem. Phys. 2014, 140, 184114) can be used to accelerate quantum-chemical string calculations. We demonstrate the method by finding minimum-energy paths for two well-characterized reactions: tautomerization of malonaldehyde and Claissen rearrangement of chorismate to prephanate. For these reactions, we show that preconditioning density functional theory (DFT) with a semiempirical method reduces the computational cost for reaching a converged path that is an optimum undermore » DFT by several fold. In conclusion, the approach also shows promise for free energy calculations when thermal noise can be controlled.« less

  1. Summer interns present research findings in poster session | Princeton

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Plasma Physics Lab Summer interns present research findings in poster session By Raphael Rosen August 31, 2015 Tweet Widget Google Plus One Share on Facebook New Jersey Assemblywoman Donna Simon Talks With SULI Intern Cara Bagley (Photo by Elle Starkman) New Jersey Assemblywoman Donna Simon Talks With SULI Intern Cara Bagley Gallery: Physicist Charles Skinner and Intern Amanda Lewis (Photo by Elle Starkman) Physicist Charles Skinner and Intern Amanda Lewis Interns Matthew Lotocki, Zack

  2. NREL Research into Perovskites Yields New Findings | PV | NREL

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Research into Perovskites Yields New Findings March 28, 2016 Researchers at the National Renewable Energy Laboratory have been examining ways to increase the efficiency and stability of solar cells based on hybrid organic-inorganic perovskite absorbers. Two recently published papers show the results of photoemission spectroscopy and time-resolved optical spectroscopy, which quantify the energetics and carrier dynamics that occur at interfaces between the perovskite absorber and transport layers.

  3. NREL Scientists Find Key Function for Ferredoxins in Algae Hydrogen

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Production - News Releases | NREL Scientists Find Key Function for Ferredoxins in Algae Hydrogen Production Two of six iron-rich proteins shown to have role in algae metabolism; discovery could lead to enhanced hydrogen production February 10, 2014 Scientists at the Energy Department's National Renewable Energy Laboratory have demonstrated that just two of six iron-sulfur-containing ferredoxins in a representative species of algae promote electron transfers to and from hydrogenases. The

  4. Livermore research finds that climate models overestimate rainfall

    National Nuclear Security Administration (NNSA)

    increases | National Nuclear Security Administration | (NNSA) Livermore research finds that climate models overestimate rainfall increases Monday, December 21, 2015 - 12:00am Researchers at Lawrence Livermore National Laboratory and collaborators have found that most climate models overestimate the increase in global precipitation due to climate change. Specifically, the team looked at 25 models and found they underestimate the increase in absorption of sunlight by water vapor as the

  5. DOE issues Finding of No Significant Impact for the Environmental

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory Tim Jackson, (208) 526-8484 For Immediate Release: February 28, 2014 DOE issues Finding of No Significant Impact for the Environmental Assessment on Resumption of Transient Testing of Nuclear Fuels and Materials at Idaho National Laboratory The U.S. Department of Energy (DOE) has determined that resuming transient testing of nuclear fuels and materials at Idaho National Laboratory (INL)

  6. ADOPTION OF ENVIRONMENTAL ASSESSMENT and FINDING OF NO SIGNIFICANT IMPACT;

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ADOPTION OF ENVIRONMENTAL ASSESSMENT and FINDING OF NO SIGNIFICANT IMPACT; DETERMINATION OF NO SIGNIFICANT IMPACT DOE/EA-1868: MANHATTAN PROJECT SITES Los Alamos, New Mexico; Hanford, Washington; Oak Ridge, Tennessee; Dayton, Ohio BACKGROUND: 'The National Park Service (NPS) issued an Environmental Assessment (September 2010) in consultation with DOE for a proposed action of recommending that Congress authorize an innovative Manhattan Project National Historical Park. The Park Service selected

  7. Researchers find potential key for unlocking biomass energy

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    Unlocking biomass energy Researchers find potential key for unlocking biomass energy Potential pretreatment method that can make plant cellulose five times more digestible by enzymes that convert it into ethanol, a useful biofuel. July 20, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new

  8. Finding and Winning Simplified Acquisitions to Grow Your Business

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Find Simplified Acquisitions... What They Buy. How Much They Spend. Which 'slices' of the Simplified pie can your company pursue? More than half of all Simplified Acquisition obligations went to small business concerns, set-aside or not! FSS (Federal Supply Schedule) *Multiple Award, Open Solicitation A simplified process of acquiring commonly used supplies and services in varying quantities at lower prices while obtaining discounts associated with volume buying. GSA and VA are the only

  9. EA-1651: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    | Department of Energy 8: Solyndra, Inc. Photovoltaic Manufacturing Facility in Fremont, CA EA-1638: Solyndra, Inc. Photovoltaic Manufacturing Facility in Fremont, CA March 2, 2009 EA-1638: Final Environmental Assessment Loan Guarantee to Solyndra, Inc. for Construction of A Photovoltaic Manufacturing Facility and Leasing of an Existing Commercial Facility in Fremont, California March 31, 2009 EA-1638: Finding of No Significant Impact Loan Guarantee to Solyndra, Inc. for Construction of a

  10. EA-1815: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    5: Diamond Green Diesel Facility in Norco, LA EA-1795: Diamond Green Diesel Facility in Norco, LA April 1, 2011 EA-1795: Final Environmental Assessment Loan Guarantee to Diamond Green Diesel, LLC for Construction of the Diamond Green Diesel Facility in Norco, Louisiana April 18, 2011 EA-1795: Finding of No Significant Impact Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana

    Final Environmental Assessment EA-1795: Final

  11. EA-1929: Finding of No Significant Impact | Department of Energy

    Office of Environmental Management (EM)

    CA | Department of Energy 0: California Valley Solar Ranch Project in San Luis Obispo County, CA EA-1840: California Valley Solar Ranch Project in San Luis Obispo County, CA August 3, 2011 EA-1840: Final Environmental Assessment California Valley Solar Ranch Project in San Luis Obispo and Kern Counties, California August 3, 2011 EA-1840: Finding of No Significant Impact Loan Guarantee to High Plains II, LLC for the California Valley Solar Ranch Project in San Luis Obispo County and Kern

  12. FOR THE SUPPLEMENTAL ENVIRONMENTAL ASSESSMENT/FINDING OF NO

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2 FOR THE SUPPLEMENTAL ENVIRONMENTAL ASSESSMENT/FINDING OF NO SIGNIFICANT IMPACT FOR THE UNIVERSITY OF MAINE'S DEEPWATER OFFSHORE FLOATING WIND TURBINE TESTING AND DEMONSTRATION PROJECT CASTINE, MAINE DOE/EA-1792-S1 US Department of Energy Office of Energy Efficiency and Renewable Energy Golden, Colorado November 2014 Supplement Analysis - 2 i November 20, 2014 DOE/EA-1792-S1 CONTENTS 1.0 Background

  13. Finding Solutions to Solar's Soft Cost Dilemma | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Solutions to Solar's Soft Cost Dilemma Finding Solutions to Solar's Soft Cost Dilemma January 8, 2013 - 1:22pm Addthis Brian Webster installs rooftop solar panels on a home in Englewood, Colorado. The Energy Department is working to streamline rooftop solar installations so that its faster, easier and cheaper for Americans to go solar. | Photo courtesy of Dennis Schroeder, NREL. Brian Webster installs rooftop solar panels on a home in Englewood, Colorado. The Energy Department is working to

  14. NREL analysis finds tax credit extensions can impact renewable energy

    U.S. Department of Energy (DOE) all webpages (Extended Search)

    deployment and electric sector CO2 emissions - News Releases | NREL analysis finds tax credit extensions can impact renewable energy deployment and electric sector CO2 emissions February 22, 2016 The Energy Department's National Renewable Energy Laboratory (NREL) today released new analysis exploring the potential impact of recently extended federal tax credits on the deployment of renewable generation technologies and related U.S. electric sector carbon dioxide (CO2) emissions. The report,

  15. Get connected: University research departments and libraries can find tools

    Office of Scientific and Technical Information (OSTI)

    and resources from DOE at .EDUconnections | OSTI, US Dept of Energy Office of Scientific and Technical Information connected: University research departments and libraries can find tools and resources from DOE at .EDUconnections Back to the OSTI News Listing for 2009 University research departments and libraries can now easily connect to important resources from the U.S. Department of Energy. Check out the specialized tools and services; visit the spotlight page spotlight to see examples of

  16. Using regulations.gov to find dockets and documents

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    regulations.gov to find dockets and documents Regulations.gov is a web-based repository of Federal regulatory documents. Publicly accessible documents associated with DOE Appliance and Equipment Standards rulemakings and related Federal Register notices are now accessible on regulations.gov On regulations.gov, you can: View Proposed and Final Rules and other regulatory documents or notices Read public comments, as well as public meeting presentations and transcripts These documents are part of a

  17. SUPPLEMENT ANALYSIS FOR THE SUPPLEMENTAL ENVIRONMENTAL ASSESSMENT/FINDING OF

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    FOR THE SUPPLEMENTAL ENVIRONMENTAL ASSESSMENT/FINDING OF NO SIGNIFICANT IMPACT FOR THE UNIVERSITY OF MAINE'S DEEPWATER OFFSHORE FLOATING WIND TURBINE TESTING AND DEMONSTRATION PROJECT CASTINE, MAINE DOE/EA-1792-S1 US Department of Energy Office of Energy Efficiency and Renewable Energy Golden, Colorado September 2013 Supplement Analysis i September 5, 2013 DOE/EA-1792-S1 CONTENTS 1.0 Background

  18. Cosmological moduli problem in large volume scenario and thermal inflation

    SciTech Connect (OSTI)

    Choi, Kiwoon; Park, Wan-Il; Shin, Chang Sub E-mail: wipark@kias.re.kr

    2013-03-01

    We show that in a large volume scenario of type IIB string or F-theory compactifications, single thermal inflation provides only a partial solution to the cosmological problem of the light volume modulus. We then clarify the conditions for double thermal inflation, being a simple extension of the usual single thermal inflation scenario, to solve the cosmological moduli problem in the case of relatively light moduli masses. Using a specific example, we demonstrate that double thermal inflation can be realized in large volume scenario in a natural manner, and the problem of the light volume modulus can be solved for the whole relevant mass range. We also find that right amount of baryon asymmetry and dark matter can be obtained via a late-time Affleck-Dine mechanism and the decays of the visible sector NLSP to flatino LSP.

  19. STAR FORMATION AROUND SUPERGIANT SHELLS IN THE LARGE MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Book, Laura G.; Chu Youhua; Gruendl, Robert A.; Fukui, Yasuo

    2009-03-15

    We examine the recent star formation associated with four supergiant shells in the Large Magellanic Cloud (LMC): LMC 1, 4, 5, and 6, which have been shown to have simple expanding-shell structures. H II regions and OB associations are used to infer star formation in the last few Myr, while massive young stellar objects reveal the current ongoing star formation. Distributions of ionized H I and molecular components of the interstellar gas are compared with the sites of recent and current star formation to determine whether triggering has taken place. We find that a great majority of the current star formation has occurred in gravitationally unstable regions, and that evidence of triggered star formation is prevalent at both large and local scales.

  20. Anomalously large isotope effect in the glass transition of water

    SciTech Connect (OSTI)

    Gainaru, Catalin; Agapov, Alexander L.; Fuentes-Landete, Violeta; Amann-Winkel, Katrin; Nelson, Helge; Köster, Karsten W.; Kolesnikov, Alexander I.; Novikov, Vladimir N.; Richert, Ranko; Böhmer, Roland; Loerting, Thomas; Sokolov, Alexei P.

    2014-11-24

    Here we present the discovery of an unusually large isotope effect in the structural relaxation and the glass transition temperature Tg of water. Dielectric relaxation spectroscopy of low-density as well as of vapor deposited amorphous water reveal Tg differences of 10±2K between H2O and D2O, sharply contrasting with other hydrogen bonded liquids for which H/D exchange increases Tg by typically less than 1K. We show that the large isotope effect and the unusual variation of relaxation times in water at low temperatures can be explained in terms of quantum effects. Thus, our findings shed new light on water's peculiar low-temperature dynamics and the possible role of quantum effects in its structural relaxation, and possibly in dynamics of other low molecular weight liquids.