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  1. Central Electronics Limited CEL | Open Energy Information

    Open Energy Info (EERE)

    Electronics Limited CEL Jump to: navigation, search Name: Central Electronics Limited (CEL) Place: Sahibabad, Uttar Pradesh, India Zip: 201010 Sector: Solar Product: String...

  2. Biomass accessibility analysis using electron tomography

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

    Hinkle, Jacob D.; Ciesielski, Peter N.; Gruchalla, Kenny; Munch, Kristin R.; Donohoe, Bryon S.

    2015-12-25

    Substrate accessibility to catalysts has been a dominant theme in theories of biomass deconstruction. Furthermore, current methods of quantifying accessibility do not elucidate mechanisms for increased accessibility due to changes in microstructure following pretreatment.

  3. Remote Access

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

    Remote Access Remote Access Laboratory employees can access Research Library databases and products from offsite using our EZproxy service. This service is limited to LANL employees with active Z numbers and cryptocards. Access Electronic Collections with EZproxy Remote Access Journals - Books - Standards - Databases (WOK, etc) How to use EZproxy: From this page: Click on the icon above. From external site: Select "OFFSITE LANL Employee". Enter your Z number and Cryptocard passcode.

  4. Controlling user access to electronic resources without password

    DOE Patents [OSTI]

    Smith, Fred Hewitt

    2015-06-16

    Described herein are devices and techniques for remotely controlling user access to a restricted computer resource. The process includes pre-determining an association of the restricted computer resource and computer-resource-proximal environmental information. Indicia of user-proximal environmental information are received from a user requesting access to the restricted computer resource. Received indicia of user-proximal environmental information are compared to associated computer-resource-proximal environmental information. User access to the restricted computer resource is selectively granted responsive to a favorable comparison in which the user-proximal environmental information is sufficiently similar to the computer-resource proximal environmental information. In at least some embodiments, the process further includes comparing user-supplied biometric measure and comparing it with a predetermined association of at least one biometric measure of an authorized user. Access to the restricted computer resource is granted in response to a favorable comparison.

  5. Accessibility

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

    Web Policies Accessibility Accessibility LANL places a high degree of emphasis on user ... Contact Web Team Email Reaching the broadest possible audience Los Alamos National ...

  6. FRAMES-2.0 Software System: Providing Password Protection and Limited Access to Models and Simulations

    SciTech Connect (OSTI)

    Whelan, Gene; Pelton, Mitch A.

    2007-08-09

    One of the most important concerns for regulatory agencies is the concept of reproducibility (i.e., reproducibility means credibility) of an assessment. One aspect of reproducibility deals with tampering of the assessment. In other words, when multiple groups are engaged in an assessment, it is important to lock down the problem that is to be solved and/or to restrict the models that are to be used to solve the problem. The objective of this effort is to provide the U.S. Nuclear Regulatory Commission (NRC) with a means to limit user access to models and to provide a mechanism to constrain the conceptual site models (CSMs) when appropriate. The purpose is to provide the user (i.e., NRC) with the ability to “lock down” the CSM (i.e., picture containing linked icons), restrict access to certain models, or both.

  7. Accessibility

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

    is committed to providing access to our Web pages for individuals with disabilities. To meet this commitment, this site is built to comply with the requirements of...

  8. Electron-limiting defect complex in hyperdoped GaAs: The D D...

    Office of Scientific and Technical Information (OSTI)

    Electron-limiting defect complex in hyperdoped GaAs: The D D X center Prev Next Title: Electron-limiting defect complex in hyperdoped GaAs: The D D X center Authors: Ma, Jie ...

  9. OSTIblog Articles in the electronic access Topic | OSTI, US Dept of Energy

    Office of Scientific and Technical Information (OSTI)

    Office of Scientific and Technical Information electronic access Topic Customized Services for the Department of Energy Research Community by Debbie Nuchols 16 Jul, 2009 in Products and Content While the majority of the Office of Scientific and Technical Information's (OSTI) activities are focused on making the Department of Energy's (DOE) scientific and technical information widely accessible, OSTI also provides special services to the Department and its contractor community. For example,

  10. Laser-to-hot-electron conversion limitations in relativistic...

    Office of Scientific and Technical Information (OSTI)

    and differing trends across multiple target types acquired from two separate laser ... edge of the main pulse measurably alters target evolution and relativistic electron ...

  11. Self-limited kinetics of electron doping in correlated oxides

    SciTech Connect (OSTI)

    Chen, Jikun Zhou, You; Jiang, Jun; Shi, Jian; Ramanathan, Shriram; Middey, Srimanta; Chakhalian, Jak; Chen, Nuofu; Chen, Lidong; Shi, Xun; Döbeli, Max

    2015-07-20

    Electron doping by hydrogenation can reversibly modify the electrical properties of complex oxides. We show that in order to realize large, fast, and reversible response to hydrogen, it is important to consider both the electron configuration on the transition metal 3d orbitals, as well as the thermodynamic stability in nickelates. Specifically, large doping-induced resistivity modulations ranging several orders of magnitude change are only observed for rare earth nickelates with small ionic radii on the A-site, in which case both electron correlation effects and the meta-stability of Ni{sup 3+} are important considerations. Charge doping via metastable incorporation of ionic dopants is of relevance to correlated oxide-based devices where advancing approaches to modify the ground state electronic properties is an important problem.

  12. Resolution Limits of Electron-beam Lithography Pushed Towards the Atomic

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

    Scale | MIT-Harvard Center for Excitonics Resolution Limits of Electron-beam Lithography Pushed Towards the Atomic Scale 10.22.2013

  13. Chasing the limits of the one electron approximation

    SciTech Connect (OSTI)

    K?dziera, Dariusz; Mentel, ?ukasz M.

    2014-10-06

    Rapid progress in the development of computational methods for quantum chemistry is not properly balanced by the development of basis sets. Even in the case of few-electron systems it is hard to find basis set which are able to reproduce the ECG benchmarks with the mhartree accuracy. In this paper we show early work on improvements of the basis sets for small atomic and molecular systems. As a starting point the ground state of lithium atom and the lowest states of lithium dimer will be investigated. The exploratory optimization of the exponents of primitive gaussians will be based on even tempered scheme combined with CISD method.

  14. Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit

    SciTech Connect (OSTI)

    Waldecker, Lutz Bertoni, Roman; Ernstorfer, Ralph

    2015-01-28

    We present the design and implementation of a highly compact femtosecond electron diffractometer working at electron energies up to 100 keV. We use a multi-body particle tracing code to simulate electron bunch propagation through the setup and to calculate pulse durations at the sample position. Our simulations show that electron bunches containing few thousands of electrons per bunch are only weakly broadened by space-charge effects and their pulse duration is thus close to the one of a single-electron wavepacket. With our compact setup, we can create electron bunches containing up to 5000 electrons with a pulse duration below 100 fs on the sample. We use the diffractometer to track the energy transfer from photoexcited electrons to the lattice in a thin film of titanium. This process takes place on the timescale of few-hundred femtoseconds and a fully equilibrated state is reached within 1 ps.

  15. Limiter

    DOE Patents [OSTI]

    Cohen, S.A.; Hosea, J.C.; Timberlake, J.R.

    1984-10-19

    A limiter with a specially contoured front face is provided. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution. This limiter shape accommodates the various power scrape-off distances lambda p, which depend on the parallel velocity, V/sub parallel/, of the impacting particles.

  16. Limiter

    DOE Patents [OSTI]

    Cohen, Samuel A.; Hosea, Joel C.; Timberlake, John R.

    1986-01-01

    A limiter with a specially contoured front face accommodates the various power scrape-off distances .lambda..sub.p, which depend on the parallel velocity, V.sub..parallel., of the impacting particles. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution.

  17. Apparatus and method for servicing an elongated suspended pump motor in an electric power plant with limited access

    DOE Patents [OSTI]

    Chavez, R.V.; Ekeroth, D.E.; Johnson, F.T.; Matusz, J.M.

    1994-04-26

    Elongated coolant pumps suspended under steam generators within containment in a power plant with limited access space, are removed and replaced by an elongated maintenance cart with an elongated opening along one side in which the motor is received. Rollers support the cart for conveying the elongated motor in an upright position out from under the steam generator and onto an elevator. The elevator is lowered to transfer support of the cart and motor through trunnions to saddles straddling the elevator for rotation of the cart to a generally horizontal position. The elevator then raises the horizontally disposed cart carrying the motor to a higher floor where it is rolled off the elevator and out through the auxiliary equipment hatch. 14 figures.

  18. Apparatus and method for servicing an elongated suspended pump motor in an electric power plant with limited access

    DOE Patents [OSTI]

    Chavez, Rossemary V.; Ekeroth, Douglas E.; Johnson, F. Thomas; Matusz, John M.

    1994-01-01

    Elongated coolant pumps suspended under steam generators within containment in a power plant with limited access space, are removed and replaced by an elongated maintenance cart with an elongated opening along one side in which the motor is received. Rollers support the cart for conveying the elongated motor in an upright position out from under the steam generator and onto an elevator. The elevator is lowered to transfer support of the cart and motor through trunnions to saddles straddling the elevator for rotation of the cart to a generally horizontal position. The elevator then raises the horizontally disposed cart carrying the motor to a higher floor where it is rolled off the elevator and out through the auxiliary equipment hatch.

  19. Spatially limited ion acoustic drift soliton in electron-positron-ion magnetoplasma

    SciTech Connect (OSTI)

    Mushtaq, A.

    2008-08-15

    Ion acoustic drift solitary wave with intermediate parametric range in both linear and nonlinear regimes has been studied in electron-positron-ion magnetoplasma. In the spatially limited region dispersion relation in the linear and Zakharov-Kuznetsov-type equation in the nonlinear regime are derived, respectively. Both equations show the coupling of electrostatic drift and ion acoustic waves. The stationary soliton solution for oblique drift solitary waves with the effect of positron concentration and temperature has been discussed analytically and graphically. The results are relevant for astrophysical observations and diagnostics of laboratory electron-positron-ion magnetoplasmas.

  20. Tendency of a rotating electron plasma to approach the Brillouin limit

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

    Gueroult, Renaud; Fruchtman, Amnon; Fisch, Nathaniel J.

    2013-07-24

    In this study, a neutral plasma is considered to be immersed in an axial magnetic field together with a radial electric field. If the electrons are magnetized, but the ions are not magnetized, then the electrons will rotate but the ions will not rotate, leading to current generation. The currents, in turn, weaken the axial magnetic field, leading to an increase in the rotation frequency of the slow Brillouin mode. This produces a positive feedback effect, further weakening the magnetic field. The operating point thus tends to drift towards the Brillouin limit, possibly finding stability only in proximity to themore » limit itself. An example of this effect might be the cylindrical Hall thruster configuration.« less

  1. Accessibility | NREL

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

    making its electronic and information technologies accessible to individuals with disabilities in accordance with Section 508 of the Rehabilitation Act (29 U.S.C. 794d), as...

  2. High frequency limit of vacuum microelectronic grating free-electron laser

    SciTech Connect (OSTI)

    Goldstein, M.; Walsh, J.E.

    1995-12-31

    The dependencies that limit high frequency operation of a vacuum microelectronic grating free-electron laser are examined. The important parameters are identified as the electron beam energy, emittance, and generalized perveance. The scaling of power with emittance and frequency is studied in the far-infrared spectral range using a modified scanning electron microscope (SEM) and submillimeter diffraction gratings. The SEM is suited to the task of generating and positioning a low emittance (10{sup -2}{pi}-mm-mrad), low current (100 {mu}A), but high current density (50-500 A cm{sup -2}) electron beam. It has been used to demonstrate the spontaneous emission process known as the Smith-Purcell effect. A vacuum microelectronic grating free-electron laser has the potential of generating radiation throughout the entire far-infrared spectral range which extends from approximately 10 to 10{sup 3}{mu}m. An introduction to the theory, initial results, and details of the experiment are reported.

  3. Local intelligent electronic device (IED) rendering templates over limited bandwidth communication link to manage remote IED

    DOE Patents [OSTI]

    Bradetich, Ryan; Dearien, Jason A; Grussling, Barry Jakob; Remaley, Gavin

    2013-11-05

    The present disclosure provides systems and methods for remote device management. According to various embodiments, a local intelligent electronic device (IED) may be in communication with a remote IED via a limited bandwidth communication link, such as a serial link. The limited bandwidth communication link may not support traditional remote management interfaces. According to one embodiment, a local IED may present an operator with a management interface for a remote IED by rendering locally stored templates. The local IED may render the locally stored templates using sparse data obtained from the remote IED. According to various embodiments, the management interface may be a web client interface and/or an HTML interface. The bandwidth required to present a remote management interface may be significantly reduced by rendering locally stored templates rather than requesting an entire management interface from the remote IED. According to various embodiments, an IED may comprise an encryption transceiver.

  4. A microwave resonator for limiting depth sensitivity for electron paramagnetic resonance spectroscopy of surfaces

    SciTech Connect (OSTI)

    Sidabras, Jason W.; Varanasi, Shiv K.; Hyde, James S.; Mett, Richard R.; Swarts, Steven G.; Swartz, Harold M.

    2014-10-15

    A microwave Surface Resonator Array (SRA) structure is described for use in Electron Paramagnetic Resonance (EPR) spectroscopy. The SRA has a series of anti-parallel transmission line modes that provides a region of sensitivity equal to the cross-sectional area times its depth sensitivity, which is approximately half the distance between the transmission line centers. It is shown that the quarter-wave twin-lead transmission line can be a useful element for design of microwave resonators at frequencies as high as 10 GHz. The SRA geometry is presented as a novel resonator for use in surface spectroscopy where the region of interest is either surrounded by lossy material, or the spectroscopist wishes to minimize signal from surrounding materials. One such application is in vivo spectroscopy of human finger-nails at X-band (9.5 GHz) to measure ionizing radiation dosages. In order to reduce losses associated with tissues beneath the nail that yield no EPR signal, the SRA structure is designed to limit depth sensitivity to the thickness of the fingernail. Another application, due to the resonator geometry and limited depth penetration, is surface spectroscopy in coating or material science. To test this application, a spectrum of 1.44 μM of Mg{sup 2+} doped polystyrene 1.1 mm thick on an aluminum surface is obtained. Modeling, design, and simulations were performed using Wolfram Mathematica (Champaign, IL; v. 9.0) and Ansys High Frequency Structure Simulator (HFSS; Canonsburg, PA; v. 15.0). A micro-strip coupling circuit is designed to suppress unwanted modes and provide a balanced impedance transformation to a 50 Ω coaxial input. Agreement between simulated and experimental results is shown.

  5. Accessing HPSS

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

    Accessing HPSS Accessing HPSS Once you have successfully generated an HPSS token you can access NERSC's HPSS in the different ways listed below. HSI and HTAR are usually the best ways to transfer data in and out of HPSS but other methods are also included. Access Method When to use this method Features Limitations HSI When a full-featured unix-like interface is desired high performance (parallel); unix-like user interface; firewall mode client is specific to HPSS version and might not work at

  6. Peculiarities of the electron spectrum and metal-insulator transition in the strong correlation limit

    SciTech Connect (OSTI)

    Irkhin, V. Yu. Zarubin, A. V.

    2013-05-15

    Green's function in the paramagnetic phase of the Hubbard model with strong electron correlations is calculated by the many-electron operators method. The density of states pattern is considered in the case of half-filling (metal-insulator transition) and in the doped case. The effect of the low-temperature Kondo scattering on the energy spectrum is analyzed, and the results are compared with the results of the dynamical mean-field theory (DMFT).

  7. Limiting electron beam current for cyclic induction acceleration in a constant guide field

    SciTech Connect (OSTI)

    Kanunnikov, V.N.

    1982-09-01

    Theoretical relations are derived for the limiting beam current in a cyclic induction accelerator (CIA) with a constant guide field. The calculations are in agreement with the available experimental data. It is shown that the limiting average beam current in a CIA is of the order of 100 microamperes, i.e., the level attained in microtrons and linear accelerators. The CIA may find industrial applications.

  8. Thermal flux limited electron Kapitza conductance in copper-niobium multilayers

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

    Cheaito, Ramez; Hattar, Khalid Mikhiel; Gaskins, John T.; Yadav, Ajay K.; Duda, John C.; Beechem, III, Thomas Edwin; Ihlefeld, Jon; Piekos, Edward S.; Baldwin, Jon K.; Misra, Amit; et al

    2015-03-05

    The interplay between the contributions of electron thermal flux and interface scattering to the Kapitza conductance across metal-metal interfaces through measurements of thermal conductivity of copper-niobium multilayers was studied. Thermal conductivities of copper-niobium multilayer films of period thicknesses ranging from 5.4 to 96.2 nm and sample thicknesses ranging from 962 to 2677 nm are measured by time-domain thermoreflectance over a range of temperatures from 78 to 500 K. The Kapitza conductances between the Cu and Nb interfaces in multilayer films are determined from the thermal conductivities using a series resistor model and are in good agreement with the electron diffusemore » mismatch model. The results for the thermal boundary conductance between Cu and Nb are compared to literature values for the thermal boundary conductance across Al-Cu and Pd-Ir interfaces, and demonstrate that the interface conductance in metallic systems is dictated by the temperature derivative of the electron energy flux in the metallic layers, rather than electron mean free path or scattering processes at the interface.« less

  9. Thermal flux limited electron Kapitza conductance in copper-niobium multilayers

    SciTech Connect (OSTI)

    Cheaito, Ramez; Hattar, Khalid Mikhiel; Gaskins, John T.; Yadav, Ajay K.; Duda, John C.; Beechem, III, Thomas Edwin; Ihlefeld, Jon; Piekos, Edward S.; Baldwin, Jon K.; Misra, Amit; Hopkins, Patrick E.

    2015-03-05

    The interplay between the contributions of electron thermal flux and interface scattering to the Kapitza conductance across metal-metal interfaces through measurements of thermal conductivity of copper-niobium multilayers was studied. Thermal conductivities of copper-niobium multilayer films of period thicknesses ranging from 5.4 to 96.2 nm and sample thicknesses ranging from 962 to 2677 nm are measured by time-domain thermoreflectance over a range of temperatures from 78 to 500 K. The Kapitza conductances between the Cu and Nb interfaces in multilayer films are determined from the thermal conductivities using a series resistor model and are in good agreement with the electron diffuse mismatch model. The results for the thermal boundary conductance between Cu and Nb are compared to literature values for the thermal boundary conductance across Al-Cu and Pd-Ir interfaces, and demonstrate that the interface conductance in metallic systems is dictated by the temperature derivative of the electron energy flux in the metallic layers, rather than electron mean free path or scattering processes at the interface.

  10. Enabling X-ray free electron laser crystallography for challenging biological systems from a limited number of crystals

    SciTech Connect (OSTI)

    Uervirojnangkoorn, Monarin; Zeldin, Oliver B.; Lyubimov, Artem Y.; Hattne, Johan; Brewster, Aaron S.; Sauter, Nicholas K.; Brunger, Axel T.; Weis, William I.

    2015-03-17

    There is considerable potential for X-ray free electron lasers (XFELs) to enable determination of macromolecular crystal structures that are difficult to solve using current synchrotron sources. Prior XFEL studies often involved the collection of thousands to millions of diffraction images, in part due to limitations of data processing methods. We implemented a data processing system based on classical post-refinement techniques, adapted to specific properties of XFEL diffraction data. When applied to XFEL data from three different proteins collected using various sample delivery systems and XFEL beam parameters, our method improved the quality of the diffraction data as well as the resulting refined atomic models and electron density maps. Moreover, the number of observations for a reflection necessary to assemble an accurate data set could be reduced to a few observations. These developments will help expand the applicability of XFEL crystallography to challenging biological systems, including cases where sample is limited.

  11. Enabling X-ray free electron laser crystallography for challenging biological systems from a limited number of crystals

    SciTech Connect (OSTI)

    Uervirojnangkoorn, Monarin; Zeldin, Oliver B.; Lyubimov, Artem Y.; Hattne, Johan; Brewster, Aaron S.; Sauter, Nicholas K.; Brunger, Axel T.; Weis, William I.

    2015-03-17

    There is considerable potential for X-ray free electron lasers (XFELs) to enable determination of macromolecular crystal structures that are difficult to solve using current synchrotron sources. Prior XFEL studies often involved the collection of thousands to millions of diffraction images, in part due to limitations of data processing methods. We implemented a data processing system based on classical post-refinement techniques, adapted to specific properties of XFEL diffraction data. When applied to XFEL data from three different proteins collected using various sample delivery systems and XFEL beam parameters, our method improved the quality of the diffraction data as well as the resulting refined atomic models and electron density maps. Moreover, the number of observations for a reflection necessary to assemble an accurate data set could be reduced to a few observations. In conclusion, these developments will help expand the applicability of XFEL crystallography to challenging biological systems, including cases where sample is limited.

  12. Effect of realistic metal electronic structure on the lower limit of contact resistivity of epitaxial metal-semiconductor contacts

    SciTech Connect (OSTI)

    Hegde, Ganesh Chris Bowen, R.

    2014-08-04

    The effect of realistic metal electronic structure on the lower limit of resistivity in [100] oriented n-Si is investigated using full band Density Functional Theory and Semi-Empirical Tight Binding calculations. It is shown that the ideal metal assumption may fail in some situations and, consequently, underestimate the lower limit of contact resistivity in n-Si by at least an order of magnitude at high doping concentrations. The mismatch in transverse momentum space in the metal and the semiconductor, the so-called valley filtering effect, is shown to be sensitive to the details of the transverse boundary conditions for the unit cells used. The results emphasize the need for explicit inclusion of the metal atomic and electronic structure in the atomistic modeling of transport across metal-semiconductor contacts.

  13. Enabling X-ray free electron laser crystallography for challenging biological systems from a limited number of crystals

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

    Uervirojnangkoorn, Monarin; Zeldin, Oliver B.; Lyubimov, Artem Y.; Hattne, Johan; Brewster, Aaron S.; Sauter, Nicholas K.; Brunger, Axel T.; Weis, William I.

    2015-03-17

    There is considerable potential for X-ray free electron lasers (XFELs) to enable determination of macromolecular crystal structures that are difficult to solve using current synchrotron sources. Prior XFEL studies often involved the collection of thousands to millions of diffraction images, in part due to limitations of data processing methods. We implemented a data processing system based on classical post-refinement techniques, adapted to specific properties of XFEL diffraction data. When applied to XFEL data from three different proteins collected using various sample delivery systems and XFEL beam parameters, our method improved the quality of the diffraction data as well as themore » resulting refined atomic models and electron density maps. Moreover, the number of observations for a reflection necessary to assemble an accurate data set could be reduced to a few observations. These developments will help expand the applicability of XFEL crystallography to challenging biological systems, including cases where sample is limited.« less

  14. Enabling X-ray free electron laser crystallography for challenging biological systems from a limited number of crystals

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

    Uervirojnangkoorn, Monarin; Zeldin, Oliver B.; Lyubimov, Artem Y.; Hattne, Johan; Brewster, Aaron S.; Sauter, Nicholas K.; Brunger, Axel T.; Weis, William I.

    2015-03-17

    There is considerable potential for X-ray free electron lasers (XFELs) to enable determination of macromolecular crystal structures that are difficult to solve using current synchrotron sources. Prior XFEL studies often involved the collection of thousands to millions of diffraction images, in part due to limitations of data processing methods. We implemented a data processing system based on classical post-refinement techniques, adapted to specific properties of XFEL diffraction data. When applied to XFEL data from three different proteins collected using various sample delivery systems and XFEL beam parameters, our method improved the quality of the diffraction data as well as themore » resulting refined atomic models and electron density maps. Moreover, the number of observations for a reflection necessary to assemble an accurate data set could be reduced to a few observations. In conclusion, these developments will help expand the applicability of XFEL crystallography to challenging biological systems, including cases where sample is limited.« less

  15. Electronic Submersible Pump (ESP) Technology and Limitations with Respect to Geothermal Systems (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    The current state of geothermal technology has limitations that hinder the expansion of utility scale power. One limitation that has been discussed by the current industry is the limitation of Electric Submersible Pump (ESP) technology. With the exception of a few geothermal fields artificial lift technology is dominated by line shaft pump (LSP) technology. LSP's utilize a pump near or below reservoir depth, which is attached to a power shaft that is attached to a motor above ground. The primary difference between an LSP and an ESP is that an ESP motor is attached directly to the pump which eliminates the power shaft. This configuration requires that the motor is submersed in the geothermal resource. ESP technology is widely used in oil production. However, the operating conditions in an oil field vary significantly from a geothermal system. One of the most notable differences when discussing artificial lift is that geothermal systems operate at significantly higher flow rates and with the potential addition of Enhanced Geothermal Systems (EGS) even greater depths. The depths and flow rates associated with geothermal systems require extreme horsepower ratings. Geothermal systems also operate in a variety of conditions including but not limited to; high temperature, high salinity, high concentrations of total dissolved solids (TDS), and non-condensable gases.

  16. ELECTRON HEAT FLUX IN THE SOLAR WIND: ARE WE OBSERVING THE COLLISIONAL LIMIT IN THE 1 AU DATA?

    SciTech Connect (OSTI)

    Landi, S.; Matteini, L.; Pantellini, F.

    2014-07-20

    Using statistically significant data at 1AU, it has recently been shown (Bale et al.) that in the solar wind, when the Knudsen number K {sub T} (the ratio between the electron mean free path and the electron temperature scale height) drops below about 0.3, the electron heat flux q intensity rapidly approaches the classical collisional Spitzer-Hrm limit. Using a fully kinetic model including the effect of Coulomb collisions and the expansion of the solar wind with heliocentric distance, we observe that the heat flux strength does indeed approach the collisional value for Knudsen numbers smaller than about 0.3 in very good agreement with the observations. However, closer inspection of the heat flux properties, such as its variation with the heliocentric distance and its dependence on the plasma parameters, shows that for Knudsen numbers between 0.02 and 0.3 the heat flux is not conveniently described by the Spitzer-Hrm formula. We conclude that even though observations at 1 AU seem to indicate that the electron heat flux intensity approaches the collisional limit when the Knudsen drops below ?0.3, the collisional limit is not a generally valid closure for a Knudsen larger than 0.01. Moreover, the good agreement between the heat flux from our model and the heat flux from solar wind measurements in the high-Knudsen number regime seems to indicate that the heat flux at 1AU is not constrained by electromagnetic instabilities as both wave-particle and wave-wave interactions are neglected in our calculations.

  17. Exploring the Limits of the Dipole Approximation with Angle-Resolved Electron Time-of-Flight Spectrometry

    SciTech Connect (OSTI)

    Laidman, S.; Pangilinan, J.; Guillemin, R.; Yu, S.U.; Ohrwall, G.; Lindle, D.; Hemmers, O.

    2002-01-01

    Understanding the electronic structure of atoms and molecules is fundamental in determining their basic properties as well as the interactions that occur with different particles such as light. One such interaction is single photoionization; a process in which a photon collides with an atom or molecule and an electron with a certain kinetic energy is emitted, leaving behind a residual ion. Theoretical models of electronic structures use the dipole approximation to simplify x-ray interactions by assuming that the electromagnetic field of the radiation, expressed as a Taylor-series expansion, can be simplified by using only the first term. It has been known for some time that the dipole approximation becomes inaccurate at high photon energies, but the threshold at which this discrepancy begins is ambiguous. In order to enhance our understanding of these limitations, we measured the electron emissions of nitrogen. Beamline 8.0.1 at the Advanced Light Source was used with an electron Time-of-Flight (TOF) end station, which measures the time required for electrons emitted to travel a fixed distance. Data were collected over a broad range of photon energies (413 - 664 eV) using five analyzers rotated to 15 chamber angles. Preliminary analysis indicates that these results confirm the breakdown of the dipole approximation at photon energies well below 1 keV and that this breakdown is greatly enhanced in molecules just above the core-level ionization threshold. As a result, new theoretical models must be made that use higher order terms that were previously truncated.

  18. Semiclassical Green’s functions and an instanton formulation of electron-transfer rates in the nonadiabatic limit

    SciTech Connect (OSTI)

    Richardson, Jeremy O. Bauer, Rainer; Thoss, Michael

    2015-10-07

    We present semiclassical approximations to Green’s functions of multidimensional systems, extending Gutzwiller’s work to the classically forbidden region. Based on steepest-descent integrals over these functions, we derive an instanton method for computing the rate of nonadiabatic reactions, such as electron transfer, in the weak-coupling limit, where Fermi’s golden-rule can be employed. This generalizes Marcus theory to systems for which the environment free-energy curves are not harmonic and where nuclear tunnelling plays a role. The derivation avoids using the Im F method or short-time approximations to real-time correlation functions. A clear physical interpretation of the nuclear tunnelling processes involved in an electron-transfer reaction is thus provided. In Paper II [J. O. Richardson, J. Chem. Phys. 143, 134116 (2015)], we discuss numerical evaluation of the formulae.

  19. Limiting Effects in the Transverse-to-Longitudinal Emittance Exchange Technique for Low Energy Relativistic Electron Beams

    SciTech Connect (OSTI)

    Rihaoui, M.M.; Piot, P.; Power, J.G.; Gai, W.; /Argonne

    2009-05-01

    Transverse to longitudinal phase space manipulation hold great promises, e.g., as a potential technique for repartitioning the emittances of a beam. A proof-of-principle experiment to demonstrate the exchange of a low longitudinal emittance with a larger transverse emittance is in preparation at the Argonne Wakefield Accelerator using a {approx}12 MeV electron beam. In this paper we explore the limiting effects of this phase space manipulation method including high order and collective effects. A realistic start-to-end simulation of the planned proof-of-principle experiment including sensitivity studies is also presented.

  20. Laser-to-hot-electron conversion limitations in relativistic laser matter interactions due to multi-picosecond dynamics

    SciTech Connect (OSTI)

    Schollmeier, Marius; Sefkow, Adam B.; Geissel, Matthias; Arefiev, Alexey V.; Flippo, Kirk A.; Gaillard, Sandrine A.; Johnson, Randy P.; Kimmel, Mark W.; Offermann, Dustin T.; Rambo, Patrick K.; Schwarz, Jens; Shimada, Tom

    2015-04-20

    High-energy short-pulse lasers are pushing the limits of plasma-based particle acceleration, x-ray generation, and high-harmonic generation by creating strong electromagnetic fields at the laser focus where electrons are being accelerated to relativistic velocities. Understanding the relativistic electron dynamics is key for an accurate interpretation of measurements. We present a unified and self-consistent modeling approach in quantitative agreement with measurements and differing trends across multiple target types acquired from two separate laser systems, which differ only in their nanosecond to picosecond-scale rising edge. Insights from high-fidelity modeling of laser-plasma interaction demonstrate that the ps-scale, orders of magnitude weaker rising edge of the main pulse measurably alters target evolution and relativistic electron generation compared to idealized pulse shapes. This can lead for instance to the experimentally observed difference between 45 MeV and 75 MeV maximum energy protons for two nominally identical laser shots, due to ps-scale prepulse variations. Our results indicate that the realistic inclusion of temporal laser pulse profiles in modeling efforts is required if predictive capability and extrapolation are sought for future target and laser designs or for other relativistic laser ion acceleration schemes.

  1. Laser-to-hot-electron conversion limitations in relativistic laser matter interactions due to multi-picosecond dynamics

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

    Schollmeier, Marius; Sefkow, Adam B.; Geissel, Matthias; Arefiev, Alexey V.; Flippo, Kirk A.; Gaillard, Sandrine A.; Johnson, Randy P.; Kimmel, Mark W.; Offermann, Dustin T.; Rambo, Patrick K.; et al

    2015-04-20

    High-energy short-pulse lasers are pushing the limits of plasma-based particle acceleration, x-ray generation, and high-harmonic generation by creating strong electromagnetic fields at the laser focus where electrons are being accelerated to relativistic velocities. Understanding the relativistic electron dynamics is key for an accurate interpretation of measurements. We present a unified and self-consistent modeling approach in quantitative agreement with measurements and differing trends across multiple target types acquired from two separate laser systems, which differ only in their nanosecond to picosecond-scale rising edge. Insights from high-fidelity modeling of laser-plasma interaction demonstrate that the ps-scale, orders of magnitude weaker rising edge ofmore » the main pulse measurably alters target evolution and relativistic electron generation compared to idealized pulse shapes. This can lead for instance to the experimentally observed difference between 45 MeV and 75 MeV maximum energy protons for two nominally identical laser shots, due to ps-scale prepulse variations. Our results indicate that the realistic inclusion of temporal laser pulse profiles in modeling efforts is required if predictive capability and extrapolation are sought for future target and laser designs or for other relativistic laser ion acceleration schemes.« less

  2. Laser-to-hot-electron conversion limitations in relativistic laser matter interactions due to multi-picosecond dynamics

    SciTech Connect (OSTI)

    Schollmeier, M.; Sefkow, A. B.; Geissel, M.; Kimmel, M. W.; Rambo, P. K.; Schwarz, J.; Arefiev, A. V.; Flippo, K. A.; Johnson, R. P.; Shimada, T.; Gaillard, S. A.; Offermann, D. T.

    2015-04-15

    High-energy short-pulse lasers are pushing the limits of plasma-based particle acceleration, x-ray generation, and high-harmonic generation by creating strong electromagnetic fields at the laser focus where electrons are being accelerated to relativistic velocities. Understanding the relativistic electron dynamics is key for an accurate interpretation of measurements. We present a unified and self-consistent modeling approach in quantitative agreement with measurements and differing trends across multiple target types acquired from two separate laser systems, which differ only in their nanosecond to picosecond-scale rising edge. Insights from high-fidelity modeling of laser-plasma interaction demonstrate that the ps-scale, orders of magnitude weaker rising edge of the main pulse measurably alters target evolution and relativistic electron generation compared to idealized pulse shapes. This can lead for instance to the experimentally observed difference between 45 MeV and 75 MeV maximum energy protons for two nominally identical laser shots, due to ps-scale prepulse variations. Our results show that the realistic inclusion of temporal laser pulse profiles in modeling efforts is required if predictive capability and extrapolation are sought for future target and laser designs or for other relativistic laser ion acceleration schemes.

  3. Testing Web Application Accessibility | Department of Energy

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

    Testing Web Application Accessibility Testing Web Application Accessibility Section 508 requires all federal agencies to make their electronic and information technologies ...

  4. Correlative transmission electron microscopy and electrical properties study of switchable phase-change random access memory line cells

    SciTech Connect (OSTI)

    Oosthoek, J. L. M.; Kooi, B. J.; Voogt, F. C.; Attenborough, K.; Verheijen, M. A.; Hurkx, G. A. M.; Gravesteijn, D. J.

    2015-02-14

    Phase-change memory line cells, where the active material has a thickness of 15 nm, were prepared for transmission electron microscopy (TEM) observation such that they still could be switched and characterized electrically after the preparation. The result of these observations in comparison with detailed electrical characterization showed (i) normal behavior for relatively long amorphous marks, resulting in a hyperbolic dependence between SET resistance and SET current, indicating a switching mechanism based on initially long and thin nanoscale crystalline filaments which thicken gradually, and (ii) anomalous behavior, which holds for relatively short amorphous marks, where initially directly a massive crystalline filament is formed that consumes most of the width of the amorphous mark only leaving minor residual amorphous regions at its edges. The present results demonstrate that even in (purposely) thick TEM samples, the TEM sample preparation hampers the probability to observe normal behavior and it can be debated whether it is possible to produce electrically switchable TEM specimen in which the memory cells behave the same as in their original bulk embedded state.

  5. Open Access

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

    access, is a type of unrestricted access to scholarly publications that is online, free of charge to everyone and free of most copyright and licensing restrictions. Open...

  6. LANSCE personnel access control system

    SciTech Connect (OSTI)

    Sturrock, J.C.; Gallegos, F.R.; Hall, M.J.

    1997-01-01

    The Radiation Security System (RSS) at the Los Alamos Neutron Science Center (LANSCE) provides personnel protection from prompt radiation due to accelerated beam. The Personnel Access Control System (PACS) is a component of the RSS that is designed to prevent personnel access to areas where prompt radiation is a hazard. PACS was designed to replace several older personnel safety systems (PSS) with a single modem unified design. Lessons learned from the operation over the last 20 years were incorporated into a redundant sensor, single-point failure safe, fault tolerant, and tamper-resistant system that prevents access to the beam areas by controlling the access keys and beam stoppers. PACS uses a layered philosophy to the physical and electronic design. The most critical assemblies are battery backed up, relay logic circuits; less critical devices use Programmable Logic Controllers (PLCs) for timing functions and communications. Outside reviewers have reviewed the operational safety of the design. The design philosophy, lessons learned, hardware design, software design, operation, and limitations of the device are described.

  7. Electron

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

    density measurement by differential interferometry W. X. Ding, D. L. Brower, B. H. Deng, and T. Yates Electrical Engineering Department, University of California-Los Angeles, Los Angeles, California 90095 ͑Received 5 May 2006; presented on 10 May 2006; accepted 16 June 2006; published online 26 September 2006͒ A novel differential interferometer is being developed to measure the electron density gradient and its fluctuations. Two separate laser beams with slight spatial offset and frequency

  8. Electron

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

    Electron thermal transport within magnetic islands in the reversed-field pinch a... H. D. Stephens, 1,b͒ D. J. Den Hartog, 1,3 C. C. Hegna, 1,2 and J. A. Reusch 1 1 Department of Physics, University of Wisconsin-Madison, 1150 University Ave., Madison, Wisconsin 53706, USA 2 Department of Engineering Physics, University of Wisconsin-Madison, 1500 Engineering Drive, Madison, Wisconsin 53706, USA 3 Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of

  9. Accessing PDSF

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

    Accessing PDSF Accessing PDSF All the linux interactive nodes are known under the name of pdsf.nersc.gov and should be accessed via that name. To access them the ssh protocol should be used and you should make sure that a Keyboard Interactive method is available in your ssh client. You will probably also want to enable X11 forwarding with the -X or -Y option, i.e., ssh -Y pdsf.nersc.gov For more information see Interactive (login) Nodes. If you are in STAR your default unix group is rhstar (just

  10. Gate Access

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

    Gate Access Gate Access Print When you first arrive at the ALS, gate clearance will have been arranged for you by the User Office. Berkeley Lab employees and visiting researchers (participating guests) may arrange for gate clearance for their visitors through the Lab's Site Access Office . Please notify the Site Office by submitting a Visitor Pass Request before 3:00 p.m. on the day before the expected visit. Include the name(s) of any visitors, the time you expect them, and your name and

  11. Gate Access

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

    to the laboratory. Visitors from outside the U.S. should be prepared to show a valid passport. See Access to the ALS for additional information about visitor procedures at the...

  12. Technical Note: Exploring the limit for the conversion of energy-subtracted CT number to electron density for high-atomic-number materials

    SciTech Connect (OSTI)

    Saito, Masatoshi; Tsukihara, Masayoshi

    2014-07-15

    Purpose: For accurate tissue inhomogeneity correction in radiotherapy treatment planning, the authors had previously proposed a novel conversion of the energy-subtracted CT number to an electron density (ΔHU–ρ{sub e} conversion), which provides a single linear relationship between ΔHU and ρ{sub e} over a wide ρ{sub e} range. The purpose of this study is to address the limitations of the conversion method with respect to atomic number (Z) by elucidating the role of partial photon interactions in the ΔHU–ρ{sub e} conversion process. Methods: The authors performed numerical analyses of the ΔHU–ρ{sub e} conversion for 105 human body tissues, as listed in ICRU Report 46, and elementary substances with Z = 1–40. Total and partial attenuation coefficients for these materials were calculated using the XCOM photon cross section database. The effective x-ray energies used to calculate the attenuation were chosen to imitate a dual-source CT scanner operated at 80–140 kV/Sn under well-calibrated and poorly calibrated conditions. Results: The accuracy of the resultant calibrated electron density,ρ{sub e}{sup cal}, for the ICRU-46 body tissues fully satisfied the IPEM-81 tolerance levels in radiotherapy treatment planning. If a criterion of ρ{sub e}{sup cal}/ρ{sub e} − 1 is assumed to be within ±2%, the predicted upper limit of Z applicable for the ΔHU–ρ{sub e} conversion under the well-calibrated condition is Z = 27. In the case of the poorly calibrated condition, the upper limit of Z is approximately 16. The deviation from the ΔHU–ρ{sub e} linearity for higher Z substances is mainly caused by the anomalous variation in the photoelectric-absorption component. Conclusions: Compensation among the three partial components of the photon interactions provides for sufficient linearity of the ΔHU–ρ{sub e} conversion to be applicable for most human tissues even for poorly conditioned scans in which there exists a large variation of effective x

  13. Accessibility Standard Statement | Department of Energy

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

    Services » Assistive Technology » Accessibility Standard Statement Accessibility Standard Statement The U.S. Department of Energy is committed to making its electronic and information technologies accessible to individuals with disabilities in accordance with Section 508 of the Rehabilitation Act (29 U.S.C. 794d), as amended in 1998. Send feedback or concerns related to the accessibility of this website to DOE Section 508 Coordinator mailbox For more information about Section 508, please visit

  14. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES...

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

    EEO ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN (61.75

  15. Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies

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

    Abbott, D.; Adderley, P.; Adeyemi, A.; Aguilera, P.; Ali, M.; Areti, H.; Baylac, M.; Benesch, J.; Bosson, G.; Cade, B.; et al

    2016-05-27

    The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-Z target. Positron polarization up to 82% have been measured for an initial electron beam momentum of 8.19~MeV/c, limited only by the electron beam polarization. We report that this technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community.

  16. Access to UCNI | Department of Energy

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

    UCNI Access to UCNI An authorized person [see § 1017.20(a)] may grant routine access to UCNI to eligible individuals. In order to be eligible for routine access, the person must have a need to know the UCNI in order to perform official duties or other Government-authorized activities and meet the criteria in § 1017.20(b). If a person does not meet the criteria for routine access, a special request for limited access must be submitted in accordance with § 1017.21(a). Policy Questions and

  17. Using Commercial Electronics in Nuclear Detection (Conference...

    Office of Scientific and Technical Information (OSTI)

    Using Commercial Electronics in Nuclear Detection Citation Details In-Document Search Title: Using Commercial Electronics in Nuclear Detection You are accessing a document from ...

  18. ACCESSING SUBCONTRACTOR EMPLOYMENT RECORDS

    Broader source: Energy.gov [DOE]

    Federal officials, on occasion, may seek access to contractor or subcontractor employment and personnel records. There are circumstances in which such access is appropriate and permissible. But...

  19. Solar access of residential rooftops in four California cities...

    Office of Scientific and Technical Information (OSTI)

    Shadows cast by trees and buildings can limit the solar access of rooftop solar-energy systems, including photovoltaic panels and thermal collectors. This study characterizes ...

  20. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES...

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

    Information On FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN ...

  1. LANL access restrictions lifted

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

    lifted LANL access restrictions lifted Vehicle access points on West Jemez Road will be open to non-badge holders. August 6, 2012 Los Alamos National Laboratory sits on top of a...

  2. Accessing Online COR Training

    Office of Energy Efficiency and Renewable Energy (EERE)

    Contracting Officer’s Representative (COR) training is now be available in an online format. "Accessing Online COR Training" provides a step-by-step guide to access the online COR course. 

  3. Keys to Access: Argonne-INCREASE partnership opens doors to collaborat...

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

    Lacking access to world-class research tools limits the types of questions a cancer researcher or aerospace engineer can ask. This lack of access also limits their ability to...

  4. Access to the ALS

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

    Gate Access Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register with the ALS User Services Office and take safety training (see Complete Safety Training ) before they are issued a Berkeley Lab ID badge and granted access to the facility. Note: Users arriving at the ALS outside registration business hours (Monday-Friday 8:00 a.m.-4:00 p.m.) must notify the User Office in advance and

  5. Dose Limits

    Office of Energy Efficiency and Renewable Energy (EERE)

    Dose Limits ERAD (Question Posted to ERAD in May 2012) Who do you define as a member of the public for the onsite MEI? This question implies that there may be more than one maximally exposed individual (MEI), one on-site and one off-site, when demonstrating compliance with the Public Dose Limit of DOE Order 458.1. Although all potential MEIs should be considered and documented, as well as the calculated doses and pathways considered, the intent of DOE Order 458.1 is in fact to ultimately identify only one MEI, a theoretical individual who could be either on-site or off-site.

  6. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY

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

    INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN | Department of Energy Information On FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN (55.86

  7. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY

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

    INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN | Department of Energy EEO ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED ENGLISH PROFICIENCY (LEP) PLAN (61.75

  8. Bharat Electronics Limited BEL | Open Energy Information

    Open Energy Info (EERE)

    products and turnkey systems with expertise in solar products and systems, defence communication, radars & sensors, telecommunication, broadcasting equipments, e-governance...

  9. Electron acceleration in three-dimensional magnetic reconnection with a guide field

    SciTech Connect (OSTI)

    Dahlin, J. T. Swisdak, M.; Drake, J. F.

    2015-10-15

    Kinetic simulations of 3D collisionless magnetic reconnection with a guide field show a dramatic enhancement of energetic electron production when compared with 2D systems. In the 2D systems, electrons are trapped in magnetic islands that limit their energy gain, whereas in the 3D systems the filamentation of the current layer leads to a stochastic magnetic field that enables the electrons to access volume-filling acceleration regions. The dominant accelerator of the most energetic electrons is a Fermi-like mechanism associated with reflection of charged particles from contracting field lines.

  10. Access to Capital Roundtable

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

    ... State of Washington Chahalis and Great Wolf Lodge Streamlined environmental approval and process Price advantages due to tax preference Access to NMTC, USDA, DOE, ...

  11. Energy Data Access

    Broader source: Energy.gov [DOE]

    Access to energy data presents a significant opportunity for many organizations interested in energy management, benchmarking, disclosure, and energy efficiency services.

  12. Access to Capital

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

    IPR 2008 Capital Investment Review CIR 2012 Quarterly Business Review Focus 2028 2011 Strategic Capital Discussions Access to Capital Debt Optimization Asset Management Cost...

  13. Carbon p electron ferromagnetism in silicon carbide (Journal...

    Office of Scientific and Technical Information (OSTI)

    Carbon p electron ferromagnetism in silicon carbide Prev Next Title: Carbon p electron ferromagnetism in silicon carbide You are accessing a document from the Department ...

  14. A predictive standard model for heavy electron systems (Conference...

    Office of Scientific and Technical Information (OSTI)

    A predictive standard model for heavy electron systems Citation Details In-Document Search Title: A predictive standard model for heavy electron systems You are accessing a ...

  15. Jefferson Lab Public Affairs: Electronic Media

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

    browser that supports web standards, but its content is accessible to any browser. Concerns? Electronic Media Navigation About Public Affairs Web Design Photography Video ...

  16. Limited English Proficiency | Department of Energy

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

    Limited English Proficiency Limited English Proficiency On August 11, 2000, President Clinton signed Executive Order 13166, "Improving Access to Services for Persons with Limited English Proficiency." The Executive Order requires federal agencies, including the Department of Energy, to examine the programs and services they provide, to determine whether there is a need for language assistance for persons with Limited English proficiency (LEP) related to their programs and services, and

  17. Accessibility - Hanford Site

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

    of Energy is committed to providing access to our Web pages for individuals with disabilities. To meet this committment, this site is built to comply with the requirements of...

  18. Remote Access Options

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

    ... Applications Features Blackberry (if applicable) Outlook Web Access (OWA) Citrix Workplace WebVPN AnyConnect VPN All methods other than Blackberry require a RSA Token Email 1 ...

  19. VEHICLE ACCESS PORTALS

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

    ACCESS PORTALS Changes Effective January 11, 2010 Traffic Lane 1: No stop required. Drivers must slow down to 15 MPH while nearing and driving through the lane Traffic Lane 2:...

  20. Caf Systems Express Access Form

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

    Cognos Report Access checkboxes (as applicable). Access to Monthly Financials & Supply Chain folders is included with any selections below. BudgetCOA - Capital project,...

  1. Nation Radiobiology Archives Distributed Access

    Energy Science and Technology Software Center (OSTI)

    1992-06-01

    NRADA1.1 is a supplement to NRADA1.0. This version eliminates several bugs, and includes a few new features. The diskettes consist of a distributed subset of information representative of the extensive NRA databases and database access software maintained at the Pacific Northwest Laboratory which provide an introduction to the scope and style of the NRA Information Systems. Information in the NRA Summary, Inventory, and Bibliographic database is available upon request. Printed reports have been provided inmore » the past. The completion of the NRADA1.1 is the realization of a long standing goal of the staff and advisory committee. Information may be easily distributed to the user in an electronic form which preserves the relationships between the various databases.« less

  2. Public Access Policy and Communications | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Public Access Policy and Communications Public Access Policy and Communications 72414 Department of Energy Public Access Plan DOE Public Access Plan 22213 White House Office of ...

  3. Public Access Policy and Communications | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    DOE PAGES Public Access Policy and Communications Public Access Policy and Communications 72414 Department of Energy Public Access Plan DOE Public Access Plan 22213 White House ...

  4. REMOTE ACCESS SERVICES | Department of Energy

    Office of Environmental Management (EM)

    Energy IT Services (EITS) Remote Access Services: Outlook Web Access RSA Token Login RSA ... Energy Information Administration (EIA) Remote Access Services Outlook Web Access EIA VPN ...

  5. ACCESS Project: Final Report

    SciTech Connect (OSTI)

    Weller, Heiko

    2015-04-01

    The ACCESS project addressed the development, testing, and demonstration of the proposed advanced technologies and the associated emission and fuel economy improvement at an engine dynamometer and on a full-scale vehicle. Improve fuel economy by 25% with minimum performance penalties Achieve SULEV level emissions with gasoline Demonstrate multi-mode combustion engine management system

  6. Special Access Programs

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-03-29

    This Order is for OFFICIAL USE ONLY and will not be distributed on the Directives' Portal. For distribution, please contact the Executive Secretary of the Special Access Program Oversight Committee at (202) 586-3345. Does not cancel/supersede other directives.

  7. LANSCE Beam Current Limiter (XL)

    SciTech Connect (OSTI)

    Gallegos, F.R.; Hall, M.J.

    1997-01-01

    The Radiation Security System (RSS) at the Los Alamos Neutron Science Center (LANSCE) is an engineered safety system that provides personnel protection from prompt radiation due to accelerated proton beams. The Beam Current Limiter (XL), as an active component of the RSS, limits the maximum average current in a beamline, thus the current available for a beam spill accident. Exceeding the pre-set limit initiates action by the RSS to mitigate the hazard (insertion of beam stoppers in the low energy beam transport). The beam limiter is an electrically isolated, toroidal transformer and associated electronics. The device was designed to continuously monitor beamline currents independent of any external timing. Fail-safe operation was a prime consideration in its development. Fail-safe operation is defined as functioning as intended (due to redundant circuitry), functioning with a more sensitive fault threshold, or generating a fault condition. This report describes the design philosophy, hardware, implementation, operation, and limitations of the device.

  8. Template Discontinuation Access

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

    FOR SUBJECT FROM: Personnel Security Program Manager SUBJECT: Discontinuation of Access Eligibility Determination Reference is made to your Questionnaire for National Security Positions signed on [insert date], which was forwarded to this office in connection with a Department of Energy security clearance request. A review of that form disclosed recent use of illegal drugs. [Insert a brief description of the circumstances such as: Specifically, you listed marijuana use 1 time in 5/02; 1 time in

  9. Suppression of x-rays generated by runaway electrons in ATF

    SciTech Connect (OSTI)

    Rasmussen, D.A.; England, A.C.; Eberle, C.C.; Devan, W.R.; Harris, J.H.; Jernigan, T.C.; Kindsfather, R.R.; Morris, R.N.; Murakami, M.; Neilson, G.H.

    1987-01-01

    X-ray emission from runaway electrons on ATF is a serious issue. Runaway suppression techniques used on Heliotron-E are not adequate for ATF. Three approaches have been developed to suppress runaway production. Monitoring devices have been installed in occupied areas and personnel access and exposure will be limited. Additional shielding will be added as required. These systems will be ready for installation and testing on ATF prior to commissioning or first plasma operation.

  10. Electron Heat Transport Measured

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

    Heat Transport Measured in a Stochastic Magnetic Field T. M. Biewer, * C. B. Forest, ... limit of s &29; 1, RR assumed the electron heat flux to be diffusive, obeying Fourier's ...

  11. U.S. Energy Department Streamlines Access to High-Tech User Facilities...

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

    ... cost for use of specialized DOE laboratory equipment and, with limited exceptions, keep ... may access specialized laboratory equipment and collaborate with laboratory scientists. ...

  12. Lower hybrid accessibility in a large, hot reversed field pinch

    SciTech Connect (OSTI)

    Dziubek, R.A.; Harvey, R.W.; Hokin, S.A.; Uchimoto, E.

    1995-11-01

    Accessibility and damping of the slow wave in a reversed field pinch (RFP) plasma is investigated theoretically, using projected Reversed Field Experiment (RFX) plasma parameters. By numerically solving the hot plasma dispersion relation, regions of propagation are found and the possibility of mode conversion is analyzed. If the parallel index of refraction of the wave is chosen judiciously at the edge of the plasma, the slow wave is accessible to a target region located just inside the reversal surface without mode conversion. Landau damping is also optimized in this region. A representative fast electron population is then added in order to determine its effect on accessibility and damping. The presence of these electrons, whose parameters were estimated by extrapolation of Madison Symmetric Torus (MST) data, does not affect the accessibility of the wave. However, the initial phase velocity of the wave needs to be increased somewhat in order to maintain optimal damping in the target zone.

  13. Electron radiography

    DOE Patents [OSTI]

    Merrill, Frank E.; Morris, Christopher

    2005-05-17

    A system capable of performing radiography using a beam of electrons. Diffuser means receive a beam of electrons and diffuse the electrons before they enter first matching quadrupoles where the diffused electrons are focused prior to the diffused electrons entering an object. First imaging quadrupoles receive the focused diffused electrons after the focused diffused electrons have been scattered by the object for focusing the scattered electrons. Collimator means receive the scattered electrons and remove scattered electrons that have scattered to large angles. Second imaging quadrupoles receive the collimated scattered electrons and refocus the collimated scattered electrons and map the focused collimated scattered electrons to transverse locations on an image plane representative of the electrons' positions in the object.

  14. Remote Access | The Ames Laboratory

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

    Ames Laboratory Information Systems supports VPN for remotely accessing internal computers and network services. These are: Once connected remotely to Ames Laboratory,...

  15. Vehicle barrier with access delay

    DOE Patents [OSTI]

    Swahlan, David J; Wilke, Jason

    2013-09-03

    An access delay vehicle barrier for stopping unauthorized entry into secure areas by a vehicle ramming attack includes access delay features for preventing and/or delaying an adversary from defeating or compromising the barrier. A horizontally deployed barrier member can include an exterior steel casing, an interior steel reinforcing member and access delay members disposed within the casing and between the casing and the interior reinforcing member. Access delay members can include wooden structural lumber, concrete and/or polymeric members that in combination with the exterior casing and interior reinforcing member act cooperatively to impair an adversarial attach by thermal, mechanical and/or explosive tools.

  16. Atomic memory access hardware implementations

    SciTech Connect (OSTI)

    Ahn, Jung Ho; Erez, Mattan; Dally, William J

    2015-02-17

    Atomic memory access requests are handled using a variety of systems and methods. According to one example method, a data-processing circuit having an address-request generator that issues requests to a common memory implements a method of processing the requests using a memory-access intervention circuit coupled between the generator and the common memory. The method identifies a current atomic-memory access request from a plurality of memory access requests. A data set is stored that corresponds to the current atomic-memory access request in a data storage circuit within the intervention circuit. It is determined whether the current atomic-memory access request corresponds to at least one previously-stored atomic-memory access request. In response to determining correspondence, the current request is implemented by retrieving data from the common memory. The data is modified in response to the current request and at least one other access request in the memory-access intervention circuit.

  17. Access, Compiling and Running Jobs

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

    Access Compiling and Running Jobs Access, Compiling and Running Jobs Access Dirac Dirac can be accessed by logging into carver.nersc.gov. Compile To compile your code, you need to land on a dirac compute node 1st: qsub -q dirac_reg -l nodes=1 -l walltime=00:30:00 -I After you are inside the job, you can load the necessary module for compile: module unload pgi module unload openmpi module unload cuda module load gcc-sl6 module load openmpi-gcc-sl6 module load cuda Now you can compile your code.

  18. Environmental Justice and Public Participation Through Electronic Access

    Broader source: Energy.gov [DOE]

    For more than a decade, Hyde Park residents and other community residents have worked to improve our living conditions. Our work has been hampered by the multitude of industrial facilities,...

  19. Speed control system for an access gate

    SciTech Connect (OSTI)

    Bzorgi, Fariborz M.

    2012-03-20

    An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first variable speed in a forward direction. The access control apparatus may include a transmission that typically has an input element that is operatively connected to the rotator. The input element is generally configured to rotate at an input speed that is proportional to the first variable speed. The transmission typically also has an output element that has an output speed that is higher than the input speed. The input element and the output element may rotate around a common transmission axis. A retardation mechanism may be employed. The retardation mechanism is typically configured to rotate around a retardation mechanism axis. Generally the retardation mechanism is operatively connected to the output element of the transmission and is configured to retard motion of the access gate in the forward direction when the first variable speed is above a control-limit speed. In many embodiments the transmission axis and the retardation mechanism axis are substantially co-axial. Some embodiments include a freewheel/catch mechanism that has an input connection that is operatively connected to the rotator. The input connection may be configured to engage an output connection when the rotator is rotated at the first variable speed in a forward direction and configured for substantially unrestricted rotation when the rotator is rotated in a reverse direction opposite the forward direction. The input element of the transmission is typically operatively connected to the output connection of the freewheel/catch mechanism.

  20. Remote direct memory access

    DOE Patents [OSTI]

    Archer, Charles J.; Blocksome, Michael A.

    2012-12-11

    Methods, parallel computers, and computer program products are disclosed for remote direct memory access. Embodiments include transmitting, from an origin DMA engine on an origin compute node to a plurality target DMA engines on target compute nodes, a request to send message, the request to send message specifying a data to be transferred from the origin DMA engine to data storage on each target compute node; receiving, by each target DMA engine on each target compute node, the request to send message; preparing, by each target DMA engine, to store data according to the data storage reference and the data length, including assigning a base storage address for the data storage reference; sending, by one or more of the target DMA engines, an acknowledgment message acknowledging that all the target DMA engines are prepared to receive a data transmission from the origin DMA engine; receiving, by the origin DMA engine, the acknowledgement message from the one or more of the target DMA engines; and transferring, by the origin DMA engine, data to data storage on each of the target compute nodes according to the data storage reference using a single direct put operation.

  1. Re: NBP RFI: Data Access | Department of Energy

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

    The Consumer Electronics Association ("CEA") respectfully submits this response to the Department of Energy's ("DOE") Request for Information on Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy ("RFI").1 CEA is the principal U.S. trade association of the consumer electronics and information technology industries. CEA's approximately 2,000 member companies include leading manufacturers and

  2. Detection and response to unauthorized access to a communication device

    DOE Patents [OSTI]

    Smith, Rhett; Gordon, Colin

    2015-09-08

    A communication gateway consistent with the present disclosure may detect unauthorized physical or electronic access and implement security actions in response thereto. A communication gateway may provide a communication path to an intelligent electronic device (IED) using an IED communications port configured to communicate with the IED. The communication gateway may include a physical intrusion detection port and a network port. The communication gateway may further include control logic configured to evaluate physical intrusion detection signal. The control logic may be configured to determine that the physical intrusion detection signal is indicative of an attempt to obtain unauthorized access to one of the communication gateway, the IED, and a device in communication with the gateway; and take a security action based upon the determination that the indication is indicative of the attempt to gain unauthorized access.

  3. Limited_Burn_CX_10-26-09.pdf

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

    Limited English Proficiency Limited English Proficiency On August 11, 2000, President Clinton signed Executive Order 13166, "Improving Access to Services for Persons with Limited English Proficiency." The Executive Order requires federal agencies, including the Department of Energy, to examine the programs and services they provide, to determine whether there is a need for language assistance for persons with Limited English proficiency (LEP) related to their programs and services, and

  4. Precision electron polarimetry

    SciTech Connect (OSTI)

    Chudakov, Eugene A.

    2013-11-01

    A new generation of precise Parity-Violating experiments will require a sub-percent accuracy of electron beam polarimetry. Compton polarimetry can provide such accuracy at high energies, but at a few hundred MeV the small analyzing power limits the sensitivity. M{\\o}ller polarimetry provides a high analyzing power independent on the beam energy, but is limited by the properties of the polarized targets commonly used. Options for precision polarimetry at ~300 MeV will be discussed, in particular a proposal to use ultra-cold atomic hydrogen traps to provide a 100\\%-polarized electron target for M{\\o}ller polarimetry.

  5. Flow reversal power limit for the HFBR (Technical Report) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Flow reversal power limit for the HFBR Citation Details In-Document Search Title: Flow reversal power limit for the HFBR You are accessing a document from the Department of ...

  6. Laboratory Access | Sample Preparation Laboratories

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

    Access Planning Ahead Planning Ahead Please complete the Beam Time Request (BTR) and Support Request forms thourgh the User Portal. Thorough chemical and sample information must be included in your BTR. Support Request forms include a list of collaborators that require laboratory access and your group's laboratory equipment requests. Researcher safety is taken seriously at SLAC. Please remember that radioactive materials, nanomaterials, and biohazardous materials have additional safety

  7. Electron Transfer

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

    3 Pierre Kennepohl1,2 and Edward Solomon1* 1Department of Chemistry, Stanford University, Stanford, CA 94305 Electron transfer, or the act of moving an electron from one place to another, is amongst the simplest of chemical processes, yet certainly one of the most critical. The process of efficiently and controllably moving electrons around is one of the primary regulation mechanisms in biology. Without stringent control of electrons in living organisms, life could simply not exist. For example,

  8. 2e Carbon Access | Open Energy Information

    Open Energy Info (EERE)

    e Carbon Access Jump to: navigation, search Name: 2e Carbon Access Place: New York, New York Zip: 10280 Sector: Carbon Product: 2E Carbon Access is an enterprise focused solely on...

  9. A brightness exceeding simulated Langmuir limit

    SciTech Connect (OSTI)

    Nakasuji, Mamoru

    2013-08-15

    When an excitation of the first lens determines a beam is parallel beam, a brightness that is 100 times higher than Langmuir limit is measured experimentally, where Langmuir limits are estimated using a simulated axial cathode current density which is simulated based on a measured emission current. The measured brightness is comparable to Langmuir limit, when the lens excitation is such that an image position is slightly shorter than a lens position. Previously measured values of brightness for cathode apical radii of curvature 20, 60, 120, 240, and 480 ?m were 8.7, 5.3, 3.3, 2.4, and 3.9 times higher than their corresponding Langmuir limits, respectively, in this experiment, the lens excitation was such that the lens and the image positions were 180 mm and 400 mm, respectively. From these measured brightness for three different lens excitation conditions, it is concluded that the brightness depends on the first lens excitation. For the electron gun operated in a space charge limited condition, some of the electrons emitted from the cathode are returned to the cathode without having crossed a virtual cathode. Therefore, method that assumes a Langmuir limit defining method using a Maxwellian distribution of electron velocities may need to be revised. For the condition in which the values of the exceeding the Langmuir limit are measured, the simulated trajectories of electrons that are emitted from the cathode do not cross the optical axis at the crossover, thus the law of sines may not be valid for high brightness electron beam systems.

  10. Visitor Hanford Computer Access Request - Hanford Site

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

    Visitor Hanford Computer Access Request Visitor Hanford Computer Access Request Visitor Hanford Computer Access Request Visitor Hanford Computer Access Request Email Email Page | Print Print Page | Text Increase Font Size Decrease Font Size The U.S. Department of Energy (DOE), Richland Operations Office (RL), in compliance with the 'Tri-Party Agreement Databases, Access Mechanism and Procedures' document, DOE/RL-93-69, Revision 5; set forth the requirements for access to the Hanford Site

  11. U-205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in RSA Access Manager. A remote user can gain access to the target system.

  12. Limited Test Ban Treaty

    National Nuclear Security Administration (NNSA)

    Detection System (USNDS), which monitors compliance with the international Limited Test Ban Treaty (LTBT). The LTBT, signed by 108 countries, prohibits nuclear testing in the...

  13. Access Venture Partners | Open Energy Information

    Open Energy Info (EERE)

    Venture Partners Jump to: navigation, search Logo: Access Venture Partners Name: Access Venture Partners Address: 8787 Turnpike Drive, Suite 260 Place: Westminster, Colorado Zip:...

  14. International Electricity Trade - Open Access | Department of...

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

    to provide non-discriminatory open access transmission services. This open access requirement would also be attached to the permit holder's authorization(s) to export electricity. ...

  15. Argonne Site Access | Advanced Photon Source

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

    Getting Started Users Home Introduction to APS New User Checklist Argonne Site Access My APS Portal My APS Portal Argonne Site Access Argonne National Laboratory is a...

  16. Get Access to Work Onsite

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

    Get Access to Work Onsite Get Access to Work Onsite Print Monday, 31 August 2009 09:48 The following process MUST be completed online by new and returning users at least TWO WEEKS prior to arrival at the ALS. Not a U.S. citizen? Please look at Documents for Foreign Nationals well ahead of your visit. Bring all relevant documents to the ALS in order to complete your registration. NOTE: Users who are citizens of, or were born in, T4 countries (Cuba, Iran, Sudan, and Syria) need DOE permission to

  17. Consumer Electronics

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

    & Events Expand News & Events Skip navigation links Residential Residential Lighting Energy Star Appliances Consumer Electronics Heat Pump Water Heaters Electric Storage Water...

  18. Golden Reading Room: Office of Acquisition Documents, Sole of Limited

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

    Source Justifications | Department of Energy Sole of Limited Source Justifications Golden Reading Room: Office of Acquisition Documents, Sole of Limited Source Justifications Below are electronic versions of Golden Field Office Reading Room documents that were created after November 1, 1996, per the requirements of the Electronic Freedom of Information Act Amendment of 1996. Most documents are available in Adobe Acrobat Portable Document Format (PDF). Sole of Limited Source Justificati

  19. Wind Access and Permitting Law

    Broader source: Energy.gov [DOE]

    The law also defines a limited set of reasonable restrictions that governments and associations are permitted to use in regulating residential wind energy systems. Any limitations put in place may...

  20. Coherent electron cooling

    SciTech Connect (OSTI)

    Litvinenko,V.

    2009-05-04

    Cooling intense high-energy hadron beams remains a major challenge in modern accelerator physics. Synchrotron radiation is still too feeble, while the efficiency of two other cooling methods, stochastic and electron, falls rapidly either at high bunch intensities (i.e. stochastic of protons) or at high energies (e-cooling). In this talk a specific scheme of a unique cooling technique, Coherent Electron Cooling, will be discussed. The idea of coherent electron cooling using electron beam instabilities was suggested by Derbenev in the early 1980s, but the scheme presented in this talk, with cooling times under an hour for 7 TeV protons in the LHC, would be possible only with present-day accelerator technology. This talk will discuss the principles and the main limitations of the Coherent Electron Cooling process. The talk will describe the main system components, based on a high-gain free electron laser driven by an energy recovery linac, and will present some numerical examples for ions and protons in RHIC and the LHC and for electron-hadron options for these colliders. BNL plans a demonstration of the idea in the near future.

  1. Laser-to-hot-electron conversion limitations in relativistic...

    Office of Scientific and Technical Information (OSTI)

    We present a unified and self-consistent modeling approach in quantitative agreement with ... Publisher: American Institute of Physics (AIP) Research Org: Sandia National Laboratories ...

  2. NBP_RFI_Data_Access.PDF | Department of Energy

    Office of Environmental Management (EM)

    NBPRFIDataAccess.PDF NBPRFIDataAccess.PDF (104.55 KB) More Documents & Publications NBPRFICommunicationsRequirements.PDF NBP RFI: Data Access RE: NBP RFI: Data Access

  3. Optical limiting materials

    DOE Patents [OSTI]

    McBranch, Duncan W.; Mattes, Benjamin R.; Koskelo, Aaron C.; Heeger, Alan J.; Robinson, Jeanne M.; Smilowitz, Laura B.; Klimov, Victor I.; Cha, Myoungsik; Sariciftci, N. Serdar; Hummelen, Jan C.

    1998-01-01

    Optical limiting materials. Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO.sub.2) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400-1100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes.

  4. CONTROL LIMITER DEVICE

    DOE Patents [OSTI]

    DeShong, J.A.

    1960-03-01

    A control-limiting device for monltoring a control system is described. The system comprises a conditionsensing device, a condition-varying device exerting a control over the condition, and a control means to actuate the condition-varying device. A control-limiting device integrates the total movement or other change of the condition-varying device over any interval of time during a continuum of overlapping periods of time, and if the tothl movement or change of the condition-varying device exceeds a preset value, the control- limiting device will switch the control of the operated apparatus from automatic to manual control.

  5. Expanding Solar Access to Nonprofits

    Broader source: Energy.gov [DOE]

    The Solar Foundation is leading a team that developed the CivicPACE program through an award from the SunShot Initiative. CivicPACE addresses the underwriting and access challenges of solar financing for tax-exempt organizations, such as churches, nonprofit affordable housing, community clinics, and education institutions.

  6. PEAK LIMITING AMPLIFIER

    DOE Patents [OSTI]

    Goldsworthy, W.W.; Robinson, J.B.

    1959-03-31

    A peak voltage amplitude limiting system adapted for use with a cascade type amplifier is described. In its detailed aspects, the invention includes an amplifier having at least a first triode tube and a second triode tube, the cathode of the second tube being connected to the anode of the first tube. A peak limiter triode tube has its control grid coupled to thc anode of the second tube and its anode connected to the cathode of the second tube. The operation of the limiter is controlled by a bias voltage source connected to the control grid of the limiter tube and the output of the system is taken from the anode of the second tube.

  7. Chapter_12_Special_Access_Programs

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

    2 Special Access Programs This chapter describes the DOE Special Access Program (SAP) at DOE HQ and implements the requirements of: * Executive Order 13526, Classified National Security Information, Section 4.3, Special Access Programs, and Section 5.4, General Responsibilities, subparagraph (d). * DOE Order 471.5, Special Access Programs. A SAP is a program established for a specific class of classified information that imposes safeguarding and access requirements exceeding those normally

  8. Remote Access Options | Department of Energy

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

    Remote Access Options Remote Access Options A Virtual Private Network (VPN) is a private connection between two resources that uses the public telecommunication infrastructure. It maintains privacy through the use of a tunneling protocol and security procedures and provides the following abilities. * Messaging via Outlook Web Access (OWA) * Remote desktop and application access via VDI and Citrix(tm) Workplace * Secure access to DOE Headquarters mission-specific internal network resources

  9. Sandia National Laboratories: Rad-Hard Electronics and Trusted Services

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

    Rad-Hard Electronics and Trusted Services Sensors Sandia's Microsystems Center affords access to trusted resources and facilities for research and development, design, layout, fabrication, characterization, packaging, and test Custom Solutions Trusted Electronic Microsystems The Sandia National Laboratories Microsystems Engineering and Sciences Applications (MESA) complex has achieved Defense MicroElectronics Activity (DMEA) Category 1A Trust Accreditation for trusted services including design,

  10. Improved limited discrepancy search

    SciTech Connect (OSTI)

    Korf, R.E.

    1996-12-31

    We present an improvement to Harvey and Ginsberg`s limited discrepancy search algorithm, which eliminates much of the redundancy in the original, by generating each path from the root to the maximum search depth only once. For a complete binary tree of depth d this reduces the asymptotic complexity from O(d+2/2 2{sup d}) to O(2{sup d}). The savings is much less in a partial tree search, or in a heavily pruned tree. The overhead of the improved algorithm on a complete binary tree is only a factor of b/(b - 1) compared to depth-first search. While this constant factor is greater on a heavily pruned tree, this improvement makes limited discrepancy search a viable alternative to depth-first search, whenever the entire tree may not be searched. Finally, we present both positive and negative empirical results on the utility of limited discrepancy search, for the problem of number partitioning.

  11. Optical limiting materials

    DOE Patents [OSTI]

    McBranch, D.W.; Mattes, B.R.; Koskelo, A.C.; Heeger, A.J.; Robinson, J.M.; Smilowitz, L.B.; Klimov, V.I.; Cha, M.; Sariciftci, N.S.; Hummelen, J.C.

    1998-04-21

    Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO{sub 2}) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400--1,100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes. 5 figs.

  12. Future of Electron Scattering and Diffraction

    SciTech Connect (OSTI)

    Hall, Ernest; Stemmer, Susanne; Zheng, Haimei; Zhu, Yimei; Maracas, George

    2014-02-25

    spectroscopy with high spatial resolution without damaging their structure. The strong interaction of electrons with matter allows high-energy electron pulses to gather structural information before a sample is damaged. Electron ScatteringImaging, diffraction, and spectroscopy are the fundamental capabilities of electron-scattering instruments. The DOE BES-funded TEAM (Transmission Electron Aberration-corrected Microscope) project achieved unprecedented sub-atomic spatial resolution in imaging through aberration-corrected transmission electron microscopy. To further advance electron scattering techniques that directly enable groundbreaking science, instrumentation must advance beyond traditional two-dimensional imaging. Advances in temporal resolution, recording the full phase and energy spaces, and improved spatial resolution constitute a new frontier in electron microscopy, and will directly address the BES Grand Challenges, such as to “control the emergent properties that arise from the complex correlations of atomic and electronic constituents” and the “hidden states” “very far away from equilibrium”. Ultrafast methods, such as the pump-probe approach, enable pathways toward understanding, and ultimately controlling, the chemical dynamics of molecular systems and the evolution of complexity in mesoscale and nanoscale systems. Central to understanding how to synthesize and exploit functional materials is having the ability to apply external stimuli (such as heat, light, a reactive flux, and an electrical bias) and to observe the resulting dynamic process in situ and in operando, and under the appropriate environment (e.g., not limited to UHV conditions). To enable revolutionary advances in electron scattering and science, the participants of the workshop recommended three major new instrumental developments: A. Atomic-Resolution Multi-Dimensional Transmission Electron Microscope: This instrument would provide quantitative information over the entire real space

  13. FELs and High-energy Electron Cooling (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    FELs and High-energy Electron Cooling Citation Details In-Document Search Title: FELs and High-energy Electron Cooling You are accessing a document from the Department of ...

  14. Access to Capital | Department of Energy

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

    Soft Costs Access to Capital Access to Capital Photo of a room full of people seated in rows with a few standing in the background. Two hands in the crowd are holding up sheets ...

  15. NBP RFI: Data Access | Department of Energy

    Office of Environmental Management (EM)

    Broadband Plan by Empowering Customers and the Smart Grid: Data Access, Third Party Use, and Privacy NBP RFI: Data Access (6.9 MB) More Documents & Publications RE: NBP RFI: ...

  16. Electron Bernstein Wave Research on CDX-U and NSTX

    SciTech Connect (OSTI)

    Taylor, G.; Efthimion, P.C.; Jones, B.; Hosea, J.C.; Kaita, R.; LeBlanc, B.P.; Majeski, R.; Munsat, T.; Phillips, C.K.; Spaleta, J.; Wilson, J.R.; Rasmussen, D.; Bell, G.; Bigelow, T.S.; Carter, M.D.; Swain, D.W.; Wilgen, J.B.; Ram, A.K.; Bers, A.; Harvey, R.W.; and Forest, C.B.

    2001-05-18

    Mode-converted electron Bernstein waves (EBWs) potentially allow the measurement of local electron temperature (Te) and the implementation of local heating and current drive in spherical torus (ST) devices, which are not directly accessible to low harmonic electron cyclotron waves. This paper reports on the measurement of X-mode radiation mode-converted from EBWs observed normal to the magnetic field on the midplane of the Current Drive Experiment-Upgrade (CDX-U) and the National Spherical Torus Experiment (NSTX) spherical torus plasmas. The radiation temperature of the EBW emission was compared to Te measured by Thomson scattering and Langmuir probes. EBW mode-conversion efficiencies of over 20% were measured on both CDX-U and NSTX. Sudden increases of mode-conversion efficiency, of over a factor of three, were observed at high-confinement-mode transitions on NSTX, when the measured edge density profile steepened. The EBW mode-conversion efficiency was found to depend on the density gradient at the mode-conversion layer in the plasma scrape-off, consistent with theoretical predictions. The EBW emission source was determined by a perturbation technique to be localized at the electron cyclotron resonance layer and was successfully used for radial transport studies. Recently, a new in-vessel antenna and Langmuir probe array were installed on CDX-U to better characterize and enhance the EBW mode-conversion process. The probe incorporates a local adjustable limiter to control and maximize the mode-conversion efficiency in front of the antenna by modifying the density profile in the plasma scrape-off where fundamental EBW mode conversion occurs. Initial results show that the mode-conversion efficiency can be increased to {approximately}100% when the local limiter is inserted near the mode-conversion layer. Plans for future EBW research, including EBW heating and current-drive studies, are discussed.

  17. Electron tube

    DOE Patents [OSTI]

    Suyama, Motohiro; Fukasawa, Atsuhito; Arisaka, Katsushi; Wang, Hanguo

    2011-12-20

    An electron tube of the present invention includes: a vacuum vessel including a face plate portion made of synthetic silica and having a surface on which a photoelectric surface is provided, a stem portion arranged facing the photoelectric surface and made of synthetic silica, and a side tube portion having one end connected to the face plate portion and the other end connected to the stem portion and made of synthetic silica; a projection portion arranged in the vacuum vessel, extending from the stem portion toward the photoelectric surface, and made of synthetic silica; and an electron detector arranged on the projection portion, for detecting electrons from the photoelectric surface, and made of silicon.

  18. DOE Public Access Plan | Department of Energy

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

    DOE Public Access Plan DOE Public Access Plan On February 22, 2013, the Director of the White House Office of Science and Technology Policy (OSTP), Dr. John Holdren, issued a memorandum to all agency and department heads entitled, "Increasing Access to the Results of Federally Funded Scientific Research." The memo directed federal agencies with more than $100 million in annual conduct of research and development to develop plans for increasing public access to peer-reviewed scientific

  19. Identity, Credential, and Access Management (ICAM)

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2013-02-19

    To establish requirements and responsibilities for DOE identity, credential, and access management program. Cancels DOE N 206.4.

  20. Heat flux limiting sleeves

    DOE Patents [OSTI]

    Harris, William G. (Tampa, FL)

    1985-01-01

    A heat limiting tubular sleeve extending over only a portion of a tube having a generally uniform outside diameter, the sleeve being open on both ends, having one end thereof larger in diameter than the other end thereof and having a wall thickness which decreases in the same direction as the diameter of the sleeve decreases so that the heat transfer through the sleeve and tube is less adjacent the large diameter end of the sleeve than adjacent the other end thereof.

  1. Electronic Coupling Dependence of Ultrafast Interfacial Electron...

    Office of Scientific and Technical Information (OSTI)

    Electronic Coupling Dependence of Ultrafast Interfacial Electron Transfer on Nanocrystalline Thin Films and Single Crystal Citation Details In-Document Search Title: Electronic ...

  2. Electronic system

    DOE Patents [OSTI]

    Robison, G H; Dickson, J F

    1960-11-15

    An electronic system is designed for indicating the occurrence of a plurality of electrically detectable events within predetermined time intervals. The system comprises separate input means electrically associated with the events under observation an electronic channel associated with each input means, including control means and indicating means; timing means adapted to apply a signal from the input means after a predetermined time to the control means to deactivate each of the channels; and means for resetting the system to its initial condition after the observation of each group of events. (D.L.C.)

  3. ELECTRONIC SYSTEM

    DOE Patents [OSTI]

    Robison, G.H. et al.

    1960-11-15

    An electronic system is described for indicating the occurrence of a plurality of electrically detectable events within predetermined time intervals. It is comprised of separate input means electrically associated with the events under observation: an electronic channel associated with each input means including control means and indicating means; timing means associated with each of the input means and the control means and adapted to derive a signal from the input means and apply it after a predetermined time to the control means to effect deactivation of each of the channels; and means for resetting the system to its initial condition after observation of each group of events.

  4. Get Access to Work Onsite

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

    Get Access to Work Onsite Print The following process MUST be completed online by new and returning users at least TWO WEEKS prior to arrival at the ALS. Not a U.S. citizen? Please look at Documents for Foreign Nationals well ahead of your visit. Bring all relevant documents to the ALS in order to complete your registration. NOTE: Users who are citizens of, or were born in, T4 countries (Cuba, Iran, Sudan, and Syria) need DOE permission to work at the ALS, a process which can take 4-6 months to

  5. Get Access to Work Onsite

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

    Get Access to Work Onsite Print The following process MUST be completed online by new and returning users at least TWO WEEKS prior to arrival at the ALS. Not a U.S. citizen? Please look at Documents for Foreign Nationals well ahead of your visit. Bring all relevant documents to the ALS in order to complete your registration. NOTE: Users who are citizens of, or were born in, T4 countries (Cuba, Iran, Sudan, and Syria) need DOE permission to work at the ALS, a process which can take 4-6 months to

  6. An Experiment on the Limits of Quantum Electro-dynamics

    DOE R&D Accomplishments [OSTI]

    Barber, W. C.; Richter, B.; Panofsky, W. K. H.; O'Neill, G. K.; Gittelman, B.

    1959-06-01

    The limitations of previously performed or suggested electrodynamic cutoff experiments are reviewed, and an electron-electron scattering experiment to be performed with storage rings to investigate further the limits of the validity of quantum electrodynamics is described. The foreseen experimental problems are discussed, and the results of the associated calculations are given. The parameters and status of the equipment are summarized. (D.C.W.)

  7. Comments of consumer electronics association | Department of Energy

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

    consumer electronics association Comments of consumer electronics association The Consumer Electronics Association ("CEA") respectfully submits these comments in response to the Department of Energy's ("DOE") Request for Information ("RFI") in the captioned proceeding. Comments of consumer electronics association (591.03 KB) More Documents & Publications Re: NBP RFI: Data Access A POLICY FRAMEWORK FOR THE 21st CENTURY GRID: Enabling Our Secure Energy Future

  8. Fault current limiter

    DOE Patents [OSTI]

    Darmann, Francis Anthony

    2013-10-08

    A fault current limiter (FCL) includes a series of high permeability posts for collectively define a core for the FCL. A DC coil, for the purposes of saturating a portion of the high permeability posts, surrounds the complete structure outside of an enclosure in the form of a vessel. The vessel contains a dielectric insulation medium. AC coils, for transporting AC current, are wound on insulating formers and electrically interconnected to each other in a manner such that the senses of the magnetic field produced by each AC coil in the corresponding high permeability core are opposing. There are insulation barriers between phases to improve dielectric withstand properties of the dielectric medium.

  9. Tests of time independence of the electron and nuclear masses with ultracold molecules

    SciTech Connect (OSTI)

    Schiller, S.; Korobov, V.

    2005-03-01

    We propose to use laser spectroscopy of ultracold molecules to establish improved limits on the time independence of electron-to-nuclear and nuclear-nuclear mass ratios by comparing, via an optical frequency comb, the frequencies of suitable sets of transitions in the ground electronic state. Hydrogen molecular ions trapped in a radiofrequency trap, sympathetically cooled by atomic ions, are identified as an accessible system. We show that the dipole-allowed rovibrational transition frequencies of HD{sup +} are suitable probes for a time dependence of m{sub e}/m{sub p} or m{sub p}/m{sub d}. Separate bounds on the time independence of these constants can be obtained from a comparison of HD{sup +} and H{sub 2}{sup +} transitions frequencies. Spectroscopy of single molecular ions via a quantum jump method is proposed as an approach toward ultrahigh precision.

  10. Approaching the Shockley-Queisser limit: General assessment of the main limiting mechanisms in photovoltaic cells

    SciTech Connect (OSTI)

    Vossier, Alexis Gualdi, Federico; Dollet, Alain; Ares, Richard; Aimez, Vincent

    2015-01-07

    In principle, the upper efficiency limit of any solar cell technology can be determined using the detailed-balance limit formalism. However, “real” solar cells show efficiencies which are always below this theoretical value due to several limiting mechanisms. We study the ability of a solar cell architecture to approach its own theoretical limit, using a novel index introduced in this work, and the amplitude with which the different limiting mechanisms affect the cell efficiency is scrutinized as a function of the electronic gap and the illumination level to which the cell is submitted. The implications for future generations of solar cells aiming at an improved conversion of the solar spectrum are also addressed.

  11. (Limiting the greenhouse effect)

    SciTech Connect (OSTI)

    Rayner, S.

    1991-01-07

    Traveler attended the Dahlem Research Conference organized by the Freien Universitat, Berlin. The subject of the conference was Limiting the Greenhouse Effect: Options for Controlling Atmospheric CO{sub 2} Accumulation. Like all Dahlem workshops, this was a meeting of scientific experts, although the disciplines represented were broader than usual, ranging across anthropology, economics, international relations, forestry, engineering, and atmospheric chemistry. Participation by scientists from developing countries was limited. The conference was divided into four multidisciplinary working groups. Traveler acted as moderator for Group 3 which examined the question What knowledge is required to tackle the principal social and institutional barriers to reducing CO{sub 2} emissions'' The working rapporteur was Jesse Ausubel of Rockefeller University. Other working groups examined the economic costs, benefits, and technical feasibility of options to reduce emissions per unit of energy service; the options for reducing energy use per unit of GNP; and the significant of linkage between strategies to reduce CO{sub 2} emissions and other goals. Draft reports of the working groups are appended. Overall, the conference identified a number of important research needs in all four areas. It may prove particularly important in bringing the social and institutional research needs relevant to climate change closer to the forefront of the scientific and policy communities than hitherto.

  12. ELECTRONIC MULTIPLIER

    DOE Patents [OSTI]

    Collier, D.M.; Meeks, L.A.; Palmer, J.P.

    1961-01-31

    S>An electronic multiplier is described for use in analog computers. Two electrical input signals are received; one controls the slope of a saw-tooth voltage wave while the other controls the time duration of the wave. A condenser and diode clamps are provided to sustain the crest voltage reached by the wave, and for storing that voltage to provide an output signal which is a steady d-c voltage.

  13. Electron Bernstein

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

    Bernstein wave emission from an overdense reversed field pinch plasma P. K. Chattopadhyay, J. K. Anderson, T. M. Biewer, D. Craig, and C. B. Forest a) Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 R. W. Harvey CompX, Del Mar, California 92014 A. P. Smirnov Moscow State University, Moscow, Russia ͑Received 11 October 2001; accepted 20 November 2001͒ Blackbody levels of emission in the electron cyclotron range of frequencies have been observed from an overdense (␻ pe

  14. ELECTRON GUN

    DOE Patents [OSTI]

    Christofilos, N.C.; Ehlers, K.W.

    1960-04-01

    A pulsed electron gun capable of delivering pulses at voltages of the order of 1 mv and currents of the order of 100 amperes is described. The principal novelty resides in a transformer construction which is disposed in the same vacuum housing as the electron source and accelerating electrode structure of the gun to supply the accelerating potential thereto. The transformer is provided by a plurality of magnetic cores disposed in circumferentially spaced relation and having a plurality of primary windings each inductively coupled to a different one of the cores, and a helical secondary winding which is disposed coaxially of the cores and passes therethrough in circumferential succession. Additional novelty resides in the disposition of the electron source cathode filament input leads interiorly of the transformer secondary winding which is hollow, as well as in the employment of a half-wave filament supply which is synchronously operated with the transformer supply such that the transformer is pulsed during the zero current portions of the half-wave cycle.

  15. SLAC All Access: Laser Labs

    ScienceCinema (OSTI)

    Minitti, Mike; Woods Mike

    2014-06-03

    From supermarket checkouts to video game consoles, lasers are ubiquitous in our lives. Here at SLAC, high-power lasers are critical to the cutting-edge research conducted at the laboratory. But, despite what you might imagine, SLAC's research lasers bear little resemblance to the blasters and phasers of science fiction. In this edition of All Access we put on our safety goggles for a peek at what goes on inside some of SLAC's many laser labs. LCLS staff scientist Mike Minitti and SLAC laser safety officer Mike Woods detail how these lasers are used to study the behavior of subatomic particles, broaden our understanding of cosmic rays and even unlock the mysteries of photosynthesis.

  16. Sealed head access area enclosure

    DOE Patents [OSTI]

    Golden, Martin P.; Govi, Aldo R.

    1978-01-01

    A liquid-metal-cooled fast breeder power reactor is provided with a sealed head access area enclosure disposed above the reactor vessel head consisting of a plurality of prefabricated structural panels including a center panel removably sealed into position with inflatable seals, and outer panels sealed into position with semipermanent sealant joints. The sealant joints are located in the joint between the edge of the panels and the reactor containment structure and include from bottom to top an inverted U-shaped strip, a lower layer of a room temperature vulcanizing material, a separator strip defining a test space therewithin, and an upper layer of a room temperature vulcanizing material. The test space is tapped by a normally plugged passage extending to the top of the enclosure for testing the seal or introducing a buffer gas thereinto.

  17. Supplier's Quick Guide to Sandia Electronic Invoicing

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

    Supplier's Quick Guide to Sandia Electronic Invoicing 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 Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. 2 Table of Contents ACCESS TO ISUPPLIER & OTHER INFORMATION:

  18. Property:EnergyAccessYearInitiated | Open Energy Information

    Open Energy Info (EERE)

    + Burkina Faso Energy Access Project + 2007 + E Ethiopia Energy Access Project + 2005 + G Ghana Energy Development and Access Project (GEDAP) + 2007 + M Mongolia Renewable Energy...

  19. Property:EnergyAccessWebsite | Open Energy Information

    Open Energy Info (EERE)

    search Property Name EnergyAccessWebsite Property Type URL Description Energy Access Source Retrieved from "http:en.openei.orgwindex.php?titleProperty:EnergyAccessWeb...

  20. Property:EnergyAccessPartner | Open Energy Information

    Open Energy Info (EERE)

    search Property Name EnergyAccessPartner Property Type Boolean Description Energy Access Partner Retrieved from "http:en.openei.orgwindex.php?titleProperty:EnergyAccessPa...

  1. IEA-Electricity Access Database | Open Energy Information

    Open Energy Info (EERE)

    - Energy Access Resource Type: Dataset Website: www.iea.orgweoelectricity.asp Language: English IEA-Electricity Access Database Screenshot References: Electricity Access...

  2. Video, Audio, and Animation Text Versions for Web Accessibility...

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

    Videos, Animations, & Audio Video, Audio, and Animation Text Versions for Web Accessibility Video, Audio, and Animation Text Versions for Web Accessibility For accessibility, ...

  3. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED

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

    9

  4. ENSURING ACCESS TO FEDERALLY CONDUCTED PROGRAMS AND ACTIVITIES BY INDIVIDUALS WITH LIMITED

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

  5. Electronic security device

    DOE Patents [OSTI]

    Eschbach, Eugene A.; LeBlanc, Edward J.; Griffin, Jeffrey W.

    1992-01-01

    The present invention relates to a security device having a control box (12) containing an electronic system (50) and a communications loop (14) over which the system transmits a signal. The device is constructed so that the communications loop can extend from the control box across the boundary of a portal such as a door into a sealed enclosure into which access is restricted whereby the loop must be damaged or moved in order for an entry to be made into the enclosure. The device is adapted for detecting unauthorized entries into such enclosures such as rooms or containers and for recording the time at which such entries occur for later reference. Additionally, the device detects attempts to tamper or interfere with the operation of the device itself and records the time at which such events take place. In the preferred embodiment, the security device includes a microprocessor-based electronic system (50) and a detection module (72) capable of registering changes in the voltage and phase of the signal transmitted over the loop.

  6. Electronic security device

    DOE Patents [OSTI]

    Eschbach, E.A.; LeBlanc, E.J.; Griffin, J.W.

    1992-03-17

    The present invention relates to a security device having a control box containing an electronic system and a communications loop over which the system transmits a signal. The device is constructed so that the communications loop can extend from the control box across the boundary of a portal such as a door into a sealed enclosure into which access is restricted whereby the loop must be damaged or moved in order for an entry to be made into the enclosure. The device is adapted for detecting unauthorized entries into such enclosures such as rooms or containers and for recording the time at which such entries occur for later reference. Additionally, the device detects attempts to tamper or interfere with the operation of the device itself and records the time at which such events take place. In the preferred embodiment, the security device includes a microprocessor-based electronic system and a detection module capable of registering changes in the voltage and phase of the signal transmitted over the loop. 11 figs.

  7. Timminco Limited | Open Energy Information

    Open Energy Info (EERE)

    Limited Jump to: navigation, search Name: Timminco Limited Place: Toronto, Ontario, Canada Zip: M5H 1J9 Product: Canadian manufacturer of magnesium and silicon; operates its...

  8. ELECTRONIC PHASE CONTROL CIRCUIT

    DOE Patents [OSTI]

    Salisbury, J.D.; Klein, W.W.; Hansen, C.F.

    1959-04-21

    An electronic circuit is described for controlling the phase of radio frequency energy applied to a multicavity linear accelerator. In one application of the circuit two cavities are excited from a single radio frequency source, with one cavity directly coupled to the source and the other cavity coupled through a delay line of special construction. A phase detector provides a bipolar d-c output signal proportional to the difference in phase between the voltage in the two cavities. This d-c signal controls a bias supply which provides a d-c output for varying the capacitnce of voltage sensitive capacitors in the delay line. The over-all operation of the circuit is completely electronic, overcoming the time response limitations of the electromechanical control systems, and the relative phase relationship of the radio frequency voltages in the two caviiies is continuously controlled to effect particle acceleration.

  9. Lower hybrid accessibility in a large, hot reversed field pinch

    SciTech Connect (OSTI)

    Dziubek, R.A.

    1995-02-01

    Recent theoretical and experimental results indicate that driving a current in the outer radius of an RPF suppresses sawtooth activity and increases particle and energy confinement times. One candidate for a form of steady state current drive is the slow wave at the lower hybrid frequency. Here, the accessibility of such a wave in an RFP plasma is investigated theoretically, with focus on the RFX machine of Padua, Italy. To drive current, the slow wave with frequency between 1.0--1.5 GHz is considered where optimal Landau damping is desired at r/a {approximately} 0.7. By numerically determining the values of the wave`s perpendicular index of refraction which satisfy the hot plasma dispersion relation, regions of propagation and evanescence can be found. The path of the wave can then be traced over a contour map of these regions so that accessibility can be clearly seen. The possibility of mode conversion events can be ascertained by plotting the values of the perpendicular index of refraction for the fast and slow wave and observing convergence points. To locate regions of maximum Landau damping, a technique developed by Stix was adapted for use with the slow wave in an RFP plasma. Results show that the slow wave is accessible to the target region without mode conversion so long as the value of the parallel index of refraction is correctly chosen at the edge of the plasma. Landau damping can also be optimized with this method. In an RFP, 2--20% of the electron population consists of fast electrons. Because this species alters the total electron distribution function and raises the effective temperature in the outer regions of the plasma, its presence is expected to shift the location of ideal Landau damping.

  10. Confidence limits and their errors

    SciTech Connect (OSTI)

    Rajendran Raja

    2002-03-22

    Confidence limits are common place in physics analysis. Great care must be taken in their calculation and use especially in cases of limited statistics. We introduce the concept of statistical errors of confidence limits and argue that not only should limits be calculated but also their errors in order to represent the results of the analysis to the fullest. We show that comparison of two different limits from two different experiments becomes easier when their errors are also quoted. Use of errors of confidence limits will lead to abatement of the debate on which method is best suited to calculate confidence limits.

  11. SLAC Access Update | Stanford Synchrotron Radiation Lightsource

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

    SLAC Access Update Effective October 2015, visit the SUSB VUE Center for badging and SLAC access. Before traveling to SLAC, please complete these procedures. 1. Register through the user portal to provide or update contact information; also confirm your proximity access/expiration through the user portal. 2. Alert us of all experimenters who will participate in scheduled experiments by listing everyone on proposals & beam time/support requests. Contact URA to add additional members to your

  12. Colorado - Access Permit Application File Review Checklist |...

    Open Energy Info (EERE)

    Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Colorado - Access Permit Application File Review Checklist Author Colorado Department of Transportation...

  13. WYDOT Access Manual | Open Energy Information

    Open Energy Info (EERE)

    search OpenEI Reference LibraryAdd to library PermittingRegulatory Guidance - GuideHandbook: WYDOT Access ManualPermittingRegulatory GuidanceGuideHandbook Abstract...

  14. Understanding and Improving Computational Science Storage Access...

    Office of Scientific and Technical Information (OSTI)

    Title: Understanding and Improving Computational Science Storage Access Through Continuous Characterization Authors: Carns, P. ; Harms, K. ; Allcock, W. ; Bacon, C. ; Lang, S. ; ...

  15. Utility Data Accessibility Map | Open Energy Information

    Open Energy Info (EERE)

    utility company to see your electricity data access options. Select the Benchmarking or Demand ResponseEnergy Efficiency map to find out whether your utility provides sufficient...

  16. Public Access Policy and Communications | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    to Advance Public Access Selected Articles and Interviews 81314 Federal News Radio Interview about DOE PAGESBeta with Brian Hitson, Acting Director, Office of Scientific and ...

  17. Access to Records Under The Privacy Act

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

    Outreach Doing Business Expand Doing Business Skip navigation links Newsroom About Us Civil Rights - EEO Freedom of Information Act The Freedom of Information Act Access to...

  18. Model Requests for Access or Correction

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

    Model-Requests-for-Access-or-Correction Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects &...

  19. Access Solar Energy LLC | Open Energy Information

    Open Energy Info (EERE)

    Solar Energy LLC Jump to: navigation, search Name: Access Solar Energy LLC Place: Park CIty, Utah Zip: 84060 Sector: Renewable Energy, Solar Product: Utah-based developers of...

  20. ORISE Resources: Puerto Rico Equal Access Program

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

    Puerto Rico Equal Access Program: Programa de Igualdad de Acceso para Puerto Rico: Recursos de Informacin del VIHSIDA de la Biblioteca Nacional de Medicina Workbook The Oak...

  1. Adjudicative Guidelines for Determining Eligibility for Access...

    Energy Savers [EERE]

    to include sensitive compartmented information and special access programs, and are to be used by government departments and agencies in all final clearance determinations. ...

  2. NBP RFI: Data Access | Department of Energy

    Office of Environmental Management (EM)

    Data Access (203.1 KB) More Documents & Publications Re: DOE Request for Information - Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data ...

  3. Access Fund Partners LP | Open Energy Information

    Open Energy Info (EERE)

    Partners, LP Place: San Juan Capistrano, California Zip: 92675 Product: Boutique investment banking and investment advisory firm with clean energy focus References: Access Fund...

  4. Ethiopia Energy Access Project | Open Energy Information

    Open Energy Info (EERE)

    Energy Access Project Location of project Ethiopia Energy Services Lighting, Cooking and water heating, Information and communications Year initiated 2005 Organization World Bank...

  5. Access Business Systems | Argonne National Laboratory

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

    system (such as Windows, Mac, Linux, Apple IOS, Android) Through most browsers (Internet Explorer, Firefox, Safari; Chrome is not currently recommended) All access is through...

  6. Chapter_12_Special_Access_Programs

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

    Order 13526, Classified National Security Information, Section 4.3, Special Access ... exceeding those normally required for information at the same classification level. ...

  7. Automatic recovery of missing amplitudes and phases in tilt-limited...

    Office of Scientific and Technical Information (OSTI)

    Automatic recovery of missing amplitudes and phases in tilt-limited electron crystallography of two-dimensional crystals Citation Details In-Document Search Title: Automatic...

  8. Limitations and improvements for harmonic generation measurements

    SciTech Connect (OSTI)

    Best, Steven; Croxford, Anthony; Neild, Simon

    2014-02-18

    A typical acoustic harmonic generation measurement comes with certain limitations. Firstly, the use of the plane wave-based analysis used to extract the nonlinear parameter, β, ignores the effects of diffraction, attenuation and receiver averaging which are common to most experiments, and may therefore limit the accuracy of a measurement. Secondly, the method usually requires data obtained from a through-transmission type setup, which may not be practical in a field measurement scenario where access to the component is limited. Thirdly, the technique lacks a means of pinpointing areas of damage in a component, as the measured nonlinearity represents an average over the length of signal propagation. Here we describe a three-dimensional model of harmonic generation in a sound beam, which is intended to provide a more realistic representation of a typical experiment. The presence of a reflecting boundary is then incorporated into the model to assess the feasibility of performing single-sided measurements. Experimental validation is provided where possible. Finally, a focusing acoustic source is modelled to provide a theoretical indication of the afforded advantages when the nonlinearity is localized.

  9. Investigation of density limit processes in DIII-D

    SciTech Connect (OSTI)

    Maingi, R.; Mahdavi, M.A.; Petrie, T.W.

    1999-02-01

    A series of experiments has been conducted in DIII-D to investigate density-limiting processes. The authors have studied divertor detachment and MARFEs on closed field lines and find semi-quantitative agreement with theoretical calculations of onset conditions. They have shown that the critical density for MARFE onset at low edge temperature scales as I{sub p}/a{sup 2}, i.e. similar to Greenwald scaling. They have also shown that the scaling of the critical separatrix density with heating power at partial detachment onset agrees with Borass` model. Both of these processes yield high edge density limits for reactors such as ITER. By using divertor pumping and pellet fueling they have avoided these and other processes and accessed densities > 1.5{times} Greenwald limit scaling with H-mode confinement, demonstrating that the Greenwald limit is not a fundamental limit on the core density.

  10. T-606: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data

    Broader source: Energy.gov [DOE]

    Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data.

  11. Limited Electricity Generation Supply and Limited Natural Gas Supply Cases (released in AEO2008)

    Reports and Publications (EIA)

    2008-01-01

    Development of U.S. energy resources and the permitting and construction of large energy facilities have become increasingly difficult over the past 20 years, and they could become even more difficult in the future. Growing public concern about global warming and CO2 emissions also casts doubt on future consumption of fossil fuels -- particularly coal, which releases the largest amount of CO2 per unit of energy produced. Even without regulations to limit greenhouse gas emissions in the United States, the investment community may already be limiting the future use of some energy options. In addition, there is considerable uncertainty about the future availability of, and access to, both domestic and foreign natural gas resources.

  12. Experimental Search for a Heavy Electron

    DOE R&D Accomplishments [OSTI]

    Boley, C. D.; Elias, J. E.; Friedman, J. I.; Hartmann, G. C.; Kendall, H. W.; Kirk, P.N.; Sogard, M. R.; Van Speybroeck, L. P.; de Pagter, J. K.

    1967-09-01

    A search for a heavy electron of the type considered by Low and Blackmon has been made by studying the inelastic scattering of 5 BeV electrons from hydrogen. The search was made over a range of values of the mass of the heavy electron from 100 t0 1300 MeV. No evidence for such a particle was observed. Upper limits on the production cross sections were determined and employed to deducelimits on the values of the electron-photon-heavy electron coupling constant in Low and Blackmon=s theory.

  13. Parallel Access of Out-Of-Core Dense Extendible Arrays

    SciTech Connect (OSTI)

    Otoo, Ekow J; Rotem, Doron

    2007-07-26

    Datasets used in scientific and engineering applications are often modeled as dense multi-dimensional arrays. For very large datasets, the corresponding array models are typically stored out-of-core as array files. The array elements are mapped onto linear consecutive locations that correspond to the linear ordering of the multi-dimensional indices. Two conventional mappings used are the row-major order and the column-major order of multi-dimensional arrays. Such conventional mappings of dense array files highly limit the performance of applications and the extendibility of the dataset. Firstly, an array file that is organized in say row-major order causes applications that subsequently access the data in column-major order, to have abysmal performance. Secondly, any subsequent expansion of the array file is limited to only one dimension. Expansions of such out-of-core conventional arrays along arbitrary dimensions, require storage reorganization that can be very expensive. Wepresent a solution for storing out-of-core dense extendible arrays that resolve the two limitations. The method uses a mapping function F*(), together with information maintained in axial vectors, to compute the linear address of an extendible array element when passed its k-dimensional index. We also give the inverse function, F-1*() for deriving the k-dimensional index when given the linear address. We show how the mapping function, in combination with MPI-IO and a parallel file system, allows for the growth of the extendible array without reorganization and no significant performance degradation of applications accessing elements in any desired order. We give methods for reading and writing sub-arrays into and out of parallel applications that run on a cluster of workstations. The axial-vectors are replicated and maintained in each node that accesses sub-array elements.

  14. Electronic Coupling Dependence of Ultrafast Interfacial Electron...

    Office of Scientific and Technical Information (OSTI)

    Electron Transfer on Nanocrystalline Thin Films and Single Crystal Lian, Tianquan 14 SOLAR ENERGY The long-term goal of the proposed research is to understand electron transfer...

  15. Foreign National Access to DOE Cyber Systems

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1999-11-01

    DOE N 205.16, dated 9-15-05, extends this Notice until 9-30-06, unless sooner rescinded. To ensure foreign national access to DOE cyber systems continues to advance DOE program objectives while enforcing information access restrictions.

  16. Requirements definition for Hanford Access Control System

    SciTech Connect (OSTI)

    Curry, R.H.; Anema, R.J.; Byers, W.R.; Champion, R.E.; Forsberg, J.I.; Fritz, R.L.; Glasscock, J.A.; Keck, R.D.; McRae, L.P.; Morales, T.P.; Sams, M.A.; Schwartz, M.J.; Vickery, E.A.

    1990-03-01

    This document defines the philosophy for access control strategy at the Department of Energy (DOE) Hanford Site. It describes the required elements necessary for effective access control system applications. The document specifies performance requirements for various levels and types of access control equipment. It also discusses methods for measuring the performance of access control equipment and processes. Selected guidance related to testing and maintenance of various levels and types of access control equipment also is included. This document addresses an essential element of the overall security program at Hanford. It supports the DOE philosophy for security programs as defined in the DOE Orders. As stated in DOE Order 5632.1A (Protection Program Operations), ``physical protection of security interests encompasses three major activities: physical security systems, protective forces, and system performance tests.``

  17. Neutral depletion and the helicon density limit

    SciTech Connect (OSTI)

    Magee, R. M.; Galante, M. E.; Carr, J. Jr.; Lusk, G.; McCarren, D. W.; Scime, E. E.

    2013-12-15

    It is straightforward to create fully ionized plasmas with modest rf power in a helicon. It is difficult, however, to create plasmas with density >10{sup 20} m{sup ?3}, because neutral depletion leads to a lack of fuel. In order to address this density limit, we present fast (1 MHz), time-resolved measurements of the neutral density at and downstream from the rf antenna in krypton helicon plasmas. At the start of the discharge, the neutral density underneath the antenna is reduced to 1% of its initial value in 15 ?s. The ionization rate inferred from these data implies that the electron temperature near the antenna is much higher than the electron temperature measured downstream. Neutral density measurements made downstream from the antenna show much slower depletion, requiring 14 ms to decrease by a factor of 1/e. Furthermore, the downstream depletion appears to be due to neutral pumping rather than ionization.

  18. COMMENTARY:Limits to adaptation

    SciTech Connect (OSTI)

    Preston, Benjamin L

    2013-01-01

    An actor-centered, risk-based approach to defining limits to social adaptation provides a useful analytic framing for identifying and anticipating these limits and informing debates over society s responses to climate change.

  19. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  20. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  1. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  2. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  3. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  4. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit interference, all of which are hidden in conventional gas-phase electron spectroscopy, owing to the

  5. Molecular-Frame Angular Distributions of Resonant Auger Electrons

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

    Molecular-Frame Angular Distributions of Resonant Auger Electrons Molecular-Frame Angular Distributions of Resonant Auger Electrons Print Wednesday, 27 May 2009 00:00 Molecular-frame electron angular distribution (MFAD) measurements provide access to an unprecedented level of detailed information about phenomena involving quantum coherence, such as phases of photoelectron waves, symmetry breaking in molecular dissociation, core-hole localization in molecules, and molecular double-slit

  6. Construction progress of the RHIC electron lenses

    SciTech Connect (OSTI)

    Fischer W.; Altinbas, Z.; Anerella, M.; Beebe, E.; et al

    2012-05-20

    In polarized proton operation the RHIC performance is limited by the head-on beam-beam effect. To overcome this limitation two electron lenses are under construction. We give an overview of the construction progress. Guns, collectors and the warm electron beam transport solenoids with their power supplies have been constructed. The superconducting solenoids that guide the electron beam during the interaction with the proton beam are near completion. A test stand has been set up to verify the performance of the gun, collector and some of the instrumentation. The infrastructure is being prepared for installation, and simulations continue to optimize the performance.

  7. On the density limit in the helicon plasma sources

    SciTech Connect (OSTI)

    Kotelnikov, Igor A.

    2014-12-15

    Existence of the density limit in the helicon plasma sources is revisited. The low- and high-frequency regimes of a helicon plasma source operation are distinguished. In the low-frequency regime with ω<√(ω{sub ci}ω{sub ce}), the density limit is deduced from the Golant-Stix criterion of the accessibility of the lower hybrid resonance. In the high-frequency case, ω>√(ω{sub ci}ω{sub ce}), an appropriate limit is given by the Shamrai-Taranov criterion. Both these criteria are closely related to the phenomenon of the coalescence of the helicon wave with the Trivelpiece-Gould mode. We draw a conclusion that the derived density limits are not currently achieved in existing devices, perhaps, because of high energy cost of gas ionization.

  8. Techniques to Access Databases and Integrate Data for Hydrologic Modeling

    SciTech Connect (OSTI)

    Whelan, Gene; Tenney, Nathan D.; Pelton, Mitchell A.; Coleman, Andre M.; Ward, Duane L.; Droppo, James G.; Meyer, Philip D.; Dorow, Kevin E.; Taira, Randal Y.

    2009-06-17

    This document addresses techniques to access and integrate data for defining site-specific conditions and behaviors associated with ground-water and surface-water radionuclide transport applicable to U.S. Nuclear Regulatory Commission reviews. Environmental models typically require input data from multiple internal and external sources that may include, but are not limited to, stream and rainfall gage data, meteorological data, hydrogeological data, habitat data, and biological data. These data may be retrieved from a variety of organizations (e.g., federal, state, and regional) and source types (e.g., HTTP, FTP, and databases). Available data sources relevant to hydrologic analyses for reactor licensing are identified and reviewed. The data sources described can be useful to define model inputs and parameters, including site features (e.g., watershed boundaries, stream locations, reservoirs, site topography), site properties (e.g., surface conditions, subsurface hydraulic properties, water quality), and site boundary conditions, input forcings, and extreme events (e.g., stream discharge, lake levels, precipitation, recharge, flood and drought characteristics). Available software tools for accessing established databases, retrieving the data, and integrating it with models were identified and reviewed. The emphasis in this review was on existing software products with minimal required modifications to enable their use with the FRAMES modeling framework. The ability of four of these tools to access and retrieve the identified data sources was reviewed. These four software tools were the Hydrologic Data Acquisition and Processing System (HDAPS), Integrated Water Resources Modeling System (IWRMS) External Data Harvester, Data for Environmental Modeling Environmental Data Download Tool (D4EM EDDT), and the FRAMES Internet Database Tools. The IWRMS External Data Harvester and the D4EM EDDT were identified as the most promising tools based on their ability to access and

  9. Integration of access control and ancillary information systems

    SciTech Connect (OSTI)

    Rodriguez, J.R.; Ahrens, J.S.

    1995-07-01

    The DOE has identified the Lawrence Livermore National Laboratory ARGUS system as the standard entry control system for the DOE Complex. ARGUS integrates several key functions, specifically, badging, entry control, and verification of clearance status. Not all sites need or can afford an ARGUS system. Such sites are therefore limited to commercial equipment which provide ARGUS like features. In this project an alternative way to integrate commercial equipment into an integrated system to include badging, access control, property control, and automated verification of clearance status has been investigated. Such a system would provide smaller sites the same functionality as is provided by ARGUS. Further, it would allow sites to fully participate in the DOE`s concept of Complex wide access control. This multi-year task is comprised of three phases. Phase 1, system requirements and definitions, and phase 2, software and hardware development, were completed during fiscal year 1994. This report covers these two phases and the demonstration system which resulted. Phase three would employ the demonstration system to evaluate system performance, identify operational limits and to integrate additional features. The demonstration system includes a badging station, a database server, a managers workstation, an entry control system, and a property protection system. The functions have been integrated through the use of custom interfaces and operator screens which greatly increase ease of use.

  10. Microtearing turbulence: Magnetic braiding and disruption limit

    SciTech Connect (OSTI)

    Firpo, Marie-Christine

    2015-12-15

    A realistic reduced model involving a large poloidal spectrum of microtearing modes is used to probe the existence of some stochasticity of magnetic field lines. Stochasticity is shown to occur even for the low values of the magnetic perturbation δB/B devoted to magnetic turbulence that have been experimentally measured. Because the diffusion coefficient may strongly depend on the radial (or magnetic-flux) coordinate, being very low near some resonant surfaces, and because its evaluation implicitly makes a normal diffusion hypothesis, one turns to another indicator appropriate to diagnose the confinement: the mean residence time of magnetic field lines. Their computation in the microturbulence frame points to the existence of a disruption limit, namely of a critical order of magnitude of δB/B above which stochasticity is no longer benign yet, leads to a macroscopic loss of confinement in some tens to hundred of electron toroidal excursions. Since the level of magnetic turbulence δB/B has been measured to grow with the plasma electron density, this would also be a density limit.

  11. Access Energy Coop | Open Energy Information

    Open Energy Info (EERE)

    Energy Coop Jump to: navigation, search Name: Access Energy Coop Place: Iowa Phone Number: 319-385-1577 or 1-866-242-4232 Website: www.accessenergycoop.com Facebook: https:...

  12. Radioactive hot cell access hole decontamination machine

    DOE Patents [OSTI]

    Simpson, William E.

    1982-01-01

    Radioactive hot cell access hole decontamination machine. A mobile housing has an opening large enough to encircle the access hole and has a shielding door, with a door opening and closing mechanism, for uncovering and covering the opening. The housing contains a shaft which has an apparatus for rotating the shaft and a device for independently translating the shaft from the housing through the opening and access hole into the hot cell chamber. A properly sized cylindrical pig containing wire brushes and cloth or other disks, with an arrangement for releasably attaching it to the end of the shaft, circumferentially cleans the access hole wall of radioactive contamination and thereafter detaches from the shaft to fall into the hot cell chamber.

  13. JOBAID-ACCESSING AND MODIFYING TALENT PROFILE

    Broader source: Energy.gov [DOE]

    The purpose of this job aid is to guide users through the step-by-step process of accessing their talent profiles, adding information to their profiles, and editing existing talent profile...

  14. NBP RFI: Data Access | Department of Energy

    Office of Environmental Management (EM)

    The RFI seeks information on smart grid privacy and data collection policies, as well as third-party access to smart grid data and the role of the consumer in balancing the ...

  15. CNM User Access Program Overview | Argonne National Laboratory

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

    User Access Program Overview The Center for Nanoscale Materials (CNM) user program provides access to equipment, facilities, and personnel that support CNM's overall focus on nanoscale materials. The CNM makes access available to the international scientific community through a general user access program. Proposals are submitted through a web-based process. PDF icon CNM User Access Program Overview

  16. Transmission Access Resources | Department of Energy

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

    Transmission Access Resources Transmission Access Resources Historically, the addition of new electric generation facilities has been accompanied by new transmission systems. For example, large nuclear and coal plants built in the 1960s and 1970s required interstate transmission infrastructure to deliver the electricity they produced. Likewise, the development of solar and wind generation in the United States will likely involve the development of new transmission. Although the cost of building

  17. Accounts & Access | Argonne Leadership Computing Facility

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

    Account Information Accounts and Access FAQ Connect & Log In Using CRYPTOCards Disk Space Quota Management Allocations Mira/Cetus/Vesta Cooley Policies Documentation Feedback Please provide feedback to help guide us as we continue to build documentation for our new computing resource. [Feedback Form] Accounts & Access Account Information Account Information: All computing carried out on the ALCF systems is associated with a user "account." This account is used to log onto the

  18. Solfex Limited | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search Name: Solfex Limited Address: Energy Arena Bannister Hall Works Off Shop Lane, Higher Walton Preston, Lancashire PR5 4DZ Place: Preston, United...

  19. Lysanda Limited | Open Energy Information

    Open Energy Info (EERE)

    CM8 3GA Product: US-based vehicle engineering consultancy with a technology capable of playing a role in vehicle emissions management. References: Lysanda Limited1 This...

  20. PURAC Limited | Open Energy Information

    Open Energy Info (EERE)

    technology and project management company in the environment sector and specialising in water, wastewater and municpal waste treatment. References: PURAC Limited1 This article...

  1. Electron beam generation in Tevatron electron lenses

    SciTech Connect (OSTI)

    Kamerdzhiev, V.; Kuznetsov, G.; Shiltsev, V.; Solyak, N.; Tiunov, M.; /Novosibirsk, IYF

    2006-08-01

    New type of high perveance electron guns with convex cathode has been developed. Three guns described in this article are built to provide transverse electron current density distributions needed for Electron Lenses for beam-beam compensation in the Tevatron collider. The current distribution can be controlled either by the gun geometry or by voltage on a special control electrode located near cathode. We present the designs of the guns and report results of beam measurements on the test bench. Because of their high current density and low transverse temperature of electrons, electron guns of this type can be used in electron cooling and beam-beam compensation devices.

  2. Reliability and Design Strength Limit Calculations on Diesel Particulate

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

    Filters | Department of Energy and Design Strength Limit Calculations on Diesel Particulate Filters Reliability and Design Strength Limit Calculations on Diesel Particulate Filters 2004 Diesel Engine Emissions Reduction (DEER) Confererence Presentation: Corning 2004_deer_webb.pdf (126.93 KB) More Documents & Publications Predicting Thermal Stress in Diesel Particulate Filters Environmental Effects on Power Electronic Devices Effect of Machining Procedures on the Strength of Ceramics for

  3. Supercomputers Help Identify Efficiency-Limiting Defects in LEDs

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

    Supercomputers Help Identify Efficiency-Limiting Defects in LEDs Supercomputers Help Identify Efficiency-Limiting Defects in LEDs July 18, 2016 Contact: Kathy Kincade, kkincade@lbl.gov, +1 510 495 2124 ChrisVanDerWalle PressReleaseImage A conceptual illustration of how defects in a crystal lattice might contribute to nonradiative recombination of electrons and holes in LEDs. Image: Peter Allen Light-emitting diodes (LEDs) have found firm footing in the lighting industry, not just for blue and

  4. Optically pulsed electron accelerator

    DOE Patents [OSTI]

    Fraser, J.S.; Sheffield, R.L.

    1985-05-20

    An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radiofrequency-powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

  5. Optically pulsed electron accelerator

    DOE Patents [OSTI]

    Fraser, John S.; Sheffield, Richard L.

    1987-01-01

    An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radio frequency powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

  6. Conditions for diffusion-limited and reaction-limited recombination in nanostructured solar cells

    SciTech Connect (OSTI)

    Ansari-Rad, Mehdi; Department of Physics, University of Shahrood, Shahrood ; Anta, Juan A.; Arzi, Ezatollah

    2014-04-07

    The performance of Dye-sensitized solar cells (DSC) and related devices made of nanostructured semiconductors relies on a good charge separation, which in turn is achieved by favoring charge transport against recombination. Although both processes occur at very different time scales, hence ensuring good charge separation, in certain cases the kinetics of transport and recombination can be connected, either in a direct or an indirect way. In this work, the connection between electron transport and recombination in nanostructured solar cells is studied both theoretically and by Monte Carlo simulation. Calculations using the Multiple-Trapping model and a realistic trap distribution for nanostructured TiO{sub 2} show that for attempt-to-jump frequencies higher than 10{sup 11}–10{sup 13} Hz, the system adopts a reaction limited (RL) regime, with a lifetime which is effectively independent from the speed of the electrons in the transport level. For frequencies lower than those, and depending on the concentration of recombination centers in the material, the system enters a diffusion-limited regime (DL), where the lifetime increases if the speed of free electrons decreases. In general, the conditions for RL or DL recombination depend critically on the time scale difference between recombination kinetics and free-electron transport. Hence, if the former is too rapid with respect to the latter, the system is in the DL regime and total thermalization of carriers is not possible. In the opposite situation, a RL regime arises. Numerical data available in the literature, and the behavior of the lifetime with respect to (1) density of recombination centers and (2) probability of recombination at a given center, suggest that a typical DSC in operation stays in the RL regime with complete thermalization, although a transition to the DL regime may occur for electrolytes or hole conductors where recombination is especially rapid or where there is a larger dispersion of energies of

  7. Tevatron Electron Lenses: Design and Operation

    SciTech Connect (OSTI)

    Shiltsev, Vladimir; Bishofberger, Kip; Kamerdzhiev, Vsevolod; Kozub, Sergei; Kufer, Matthew; Kuznetsov, Gennady; Martinez, Alexander; Olson, Marvin; Pfeffer, Howard; Saewert, Greg; Scarpine, Vic; /Fermilab /SLAC /Fermilab /Serpukhov, IHEP /Novosibirsk, IYF /Serpukhov, IHEP /Fermilab

    2008-08-01

    The beam-beam effects have been the dominating sources of beam loss and lifetime limitations in the Tevatron proton-antiproton collider [1]. Electron lenses were originally proposed for compensation of electromagnetic long-range and head-on beam-beam interactions of proton and antiproton beams [2]. Results of successful employment of two electron lenses built and installed in the Tevatron are reported in [3,4,5]. In this paper we present design features of the Tevatron electron lenses (TELs), discuss the generation of electron beams, describe different modes of operation and outline the technical parameters of various subsystems.

  8. The equation of motion of an electron

    SciTech Connect (OSTI)

    Kim, K.; Sessler, A.M.

    1999-07-01

    We review the current status of understanding of the equation of motion of an electron. Classically, a consistent, linearized theory exists for an electron of finite extent, as long as the size of the electron is larger than the classical electron radius. Nonrelativistic quantum mechanics seems to offer a fine theory even in the point particle limit. Although there is as yet no convincing calculation, it is probable that a quantum electrodynamical result will be at least as well-behaved as is the nonrelativistic quantum mechanical results. {copyright} {ital 1999 American Institute of Physics.}

  9. Silver Spring Networks comments on DOE NBP RFI: Data Access ...

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

    Data Access Silver Spring Networks comments on DOE NBP RFI: Data Access Silver Spring Networks comments on DOE NBP RFI: Data Access Silver Spring Networks comments on DOE NBP RFI: ...

  10. INSTRUCTIONS FOR USING HSPD-12 AUTHENTICATED OUTLOOK WEB ACCESS...

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

    172013 Page 1 INSTRUCTIONS FOR USING HSPD-12 AUTHENTICATED OUTLOOK WEB ACCESS (OWA) Outlook Web Access provides access to unencrypted email only and is suitable for use from any ...

  11. Instructions for Using Secure Email via Outlook Web Access |...

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

    Outlook Web Access provides access to unencrypted email only and is suitable for use from ... DOEnet or Internet access and a supported web browser Secure Email Login Procedure: Enter ...

  12. FUEL CASK IMPACT LIMITER VULNERABILITIES

    SciTech Connect (OSTI)

    Leduc, D; Jeffery England, J; Roy Rothermel, R

    2009-02-09

    Cylindrical fuel casks often have impact limiters surrounding just the ends of the cask shaft in a typical 'dumbbell' arrangement. The primary purpose of these impact limiters is to absorb energy to reduce loads on the cask structure during impacts associated with a severe accident. Impact limiters are also credited in many packages with protecting closure seals and maintaining lower peak temperatures during fire events. For this credit to be taken in safety analyses, the impact limiter attachment system must be shown to retain the impact limiter following Normal Conditions of Transport (NCT) and Hypothetical Accident Conditions (HAC) impacts. Large casks are often certified by analysis only because of the costs associated with testing. Therefore, some cask impact limiter attachment systems have not been tested in real impacts. A recent structural analysis of the T-3 Spent Fuel Containment Cask found problems with the design of the impact limiter attachment system. Assumptions in the original Safety Analysis for Packaging (SARP) concerning the loading in the attachment bolts were found to be inaccurate in certain drop orientations. This paper documents the lessons learned and their applicability to impact limiter attachment system designs.

  13. Modeling Incoherent Electron Cloud Effects

    SciTech Connect (OSTI)

    Vay, Jean-Luc; Benedetto, E.; Fischer, W.; Franchetti, G.; Ohmi, K.; Schulte, D.; Sonnad, K.; Tomas, R.; Vay, J.-L.; Zimmermann, F.; Rumolo, G.; Pivi, M.; Raubenheimer, T.

    2007-06-18

    Incoherent electron effects could seriously limit the beam lifetime in proton or ion storage rings, such as LHC, SPS, or RHIC, or blow up the vertical emittance of positron beams, e.g., at the B factories or in linear-collider damping rings. Different approaches to modeling these effects each have their own merits and drawbacks. We describe several simulation codes which simplify the descriptions of the beam-electron interaction and of the accelerator structure in various different ways, and present results for a toy model of the SPS. In addition, we present evidence that for positron beams the interplay of incoherent electron-cloud effects and synchrotron radiation can lead to a significant increase in vertical equilibrium emittance. The magnitude of a few incoherent e+e- scattering processes is also estimated. Options for future code development are reviewed.

  14. Impact Limiter Tests of Four Commonly Used Materials And Limiter...

    Office of Scientific and Technical Information (OSTI)

    ... of four impact limiter materials was tested at four different load rates, quasi-statically, 44 feet per second (ftjs), (a 9 meter drop test per lOCF71), 33 fts and 22 fts. ...

  15. Mozambique-Biofuels, Land Access and Rural Livelihoods | Open...

    Open Energy Info (EERE)

    Biofuels, Land Access and Rural Livelihoods Jump to: navigation, search Name Mozambique-Biofuels, Land Access and Rural Livelihoods AgencyCompany Organization International...

  16. Tanzania-Biofuels, Land Access and Rural Livelihoods | Open Energy...

    Open Energy Info (EERE)

    Tanzania-Biofuels, Land Access and Rural Livelihoods Jump to: navigation, search Name Tanzania-Biofuels, Land Access and Rural Livelihoods AgencyCompany Organization...

  17. RAPID/Geothermal/Land Access/Colorado | Open Energy Information

    Open Energy Info (EERE)

    RAPIDGeothermalLand AccessColorado < RAPID | Geothermal | Land Access Jump to: navigation, search RAPID Regulatory and Permitting Information Desktop Toolkit BETA About...

  18. RAPID/Geothermal/Land Access/Oregon | Open Energy Information

    Open Energy Info (EERE)

    RAPIDGeothermalLand AccessOregon < RAPID | Geothermal | Land Access Jump to: navigation, search RAPID Regulatory and Permitting Information Desktop Toolkit BETA About Bulk...

  19. RAPID/Geothermal/Land Access/Alaska | Open Energy Information

    Open Energy Info (EERE)

    RAPIDGeothermalLand AccessAlaska < RAPID | Geothermal | Land Access Jump to: navigation, search RAPID Regulatory and Permitting Information Desktop Toolkit BETA About Bulk...

  20. Republic of Yemen Energy Access Project | Open Energy Information

    Open Energy Info (EERE)

    Yemen Energy Access Project Jump to: navigation, search Name of project Republic of Yemen Energy Access Project Location of project Yemen Year initiated 2006 Organization World...

  1. Montana - Access Road Easement Policy | Open Energy Information

    Open Energy Info (EERE)

    Access Road Easement Policy Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Montana - Access Road Easement Policy Author Montana Department of...

  2. Burkina Faso Energy Access Project | Open Energy Information

    Open Energy Info (EERE)

    Burkina Faso Energy Access Project Jump to: navigation, search Name of project Burkina Faso Energy Access Project Location of project Burkina Faso Year initiated 2007 Organization...

  3. Thanks to Energy Department Funding, Safer Access to Offshore...

    Office of Environmental Management (EM)

    Thanks to Energy Department Funding, Safer Access to Offshore Wind Turbine Platforms is Demonstrated Thanks to Energy Department Funding, Safer Access to Offshore Wind Turbine ...

  4. CDOT - State Highway Access Permit Application | Open Energy...

    Open Energy Info (EERE)

    State Highway Access Permit Application Jump to: navigation, search OpenEI Reference LibraryAdd to library General: CDOT - State Highway Access Permit Application Author Colorado...

  5. Instructions for using HSPD-12 Authenticated Outlook Web Access...

    Energy Savers [EERE]

    Instructions for using HSPD-12 Authenticated Outlook Web Access (OWA) Instructions for using HSPD-12 Authenticated Outlook Web Access (OWA) Provides instructions for remote Outlook...

  6. Request Access to the PARSIIe Project Management Lessons Learned...

    Energy Savers [EERE]

    Request Access to the PARSIIe Project Management Lessons Learned (PMLL) Repository Request Access to the PARSIIe Project Management Lessons Learned (PMLL) Repository PURPOSE...

  7. Proposed Open Access Requirement for International Electric Transmissi...

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

    to provide ondiscriminatory open access transmission services. The open access requirement would also be attached to the permit holder's authorization(s) to export electricity. ...

  8. Benin: Increased Access to Modern Energy Project | Open Energy...

    Open Energy Info (EERE)

    Bank1 The objective of the Increased Access to Modern Energy Project is to improve reliability, efficiency, and access to modern energy services in Benin. There are three...

  9. A Web Accessible Scientific Workflow System for Performance Monitoring...

    Office of Scientific and Technical Information (OSTI)

    Web Accessible Scientific Workflow System for Performance Monitoring Citation Details In-Document Search Title: A Web Accessible Scientific Workflow System for Performance ...

  10. Web-Accessible Scientific Workflow System for Performance Monitoring...

    Office of Scientific and Technical Information (OSTI)

    Web-Accessible Scientific Workflow System for Performance Monitoring Citation Details In-Document Search Title: Web-Accessible Scientific Workflow System for Performance Monitoring ...