Powered by Deep Web Technologies
Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Pulsed Power for a Dynamic Transmission Electron Microscope  

Science Conference Proceedings (OSTI)

Lawrence Livermore National Laboratory (LLNL) has converted a commercial 200kV transmission electron microscope (TEM) into an ultrafast, nanoscale diagnostic tool for material science studies. The resulting Dynamic Transmission Electron Microscope (DTEM) has provided a unique tool for the study of material phase transitions, reaction front analyses, and other studies in the fields of chemistry, materials science, and biology. The TEM's thermionic electron emission source was replaced with a fast photocathode and a laser beam path was provided for ultraviolet surface illumination. The resulting photoelectron beam gives downstream images of 2 and 20 ns exposure times at 100 and 10 nm spatial resolution. A separate laser, used as a pump pulse, is used to heat, ignite, or shock samples while the photocathode electron pulses, carefully time-synchronized with the pump, function as probe in fast transient studies. The device functions in both imaging and diffraction modes. A laser upgrade is underway to make arbitrary cathode pulse trains of variable pulse width of 10-1000 ns. Along with a fast e-beam deflection scheme, a 'movie mode' capability will be added to this unique diagnostic tool. This talk will review conventional electron microscopy and its limitations, discuss the development and capabilities of DTEM, in particularly addressing the prime and pulsed power considerations in the design and fabrication of the DTEM, and conclude with the presentation of a deflector and solid-state pulser design for Movie-Mode DTEM.

dehope, w j; browning, n; campbell, g; cook, e; king, w; lagrange, t; reed, b; stuart, b; Shuttlesworth, R; Pyke, B

2009-06-25T23:59:59.000Z

2

Photocathode Optimization for a Dynamic Transmission Electron Microscope: Final Report  

SciTech Connect

The Dynamic Transmission Electron Microscope (DTEM) team at Harvey Mudd College has been sponsored by LLNL to design and build a test setup for optimizing the performance of the DTEM's electron source. Unlike a traditional TEM, the DTEM achieves much faster exposure times by using photoemission from a photocathode to produce electrons for imaging. The DTEM team's work is motivated by the need to improve the coherence and current density of the electron cloud produced by the electron gun in order to increase the image resolution and contrast achievable by DTEM. The photoemission test setup is nearly complete and the team will soon complete baseline tests of electron gun performance. The photoemission laser and high voltage power supply have been repaired; the optics path for relaying the laser to the photocathode has been finalized, assembled, and aligned; the internal setup of the vacuum chamber has been finalized and mostly implemented; and system control, synchronization, and data acquisition has been implemented in LabVIEW. Immediate future work includes determining a consistent alignment procedure to place the laser waist on the photocathode, and taking baseline performance measurements of the tantalum photocathode. Future research will examine the performance of the electron gun as a function of the photoemission laser profile, the photocathode material, and the geometry and voltages of the accelerating and focusing components in the electron gun. This report presents the team's progress and outlines the work that remains.

Ellis, P; Flom, Z; Heinselman, K; Nguyen, T; Tung, S; Haskell, R; Reed, B W; LaGrange, T

2011-08-04T23:59:59.000Z

3

Transmission Electron Microscopy (TEM)  

Science Conference Proceedings (OSTI)

...Transmission electron microcopy (TEM) has been used since the 1950s to obtain very high resolution images of microstructures. As TEMs were enhanced to include features such as digitally scanned point beams and energy dispersive x-ray detectors

4

Solving the Accelerator-Condenser Coupling Problem in a Nanosecond Dynamic Transmission Electron Microscope  

Science Conference Proceedings (OSTI)

We describe a modification to a transmission electron microscope (TEM) that allows it to briefly (using a pulsed-laser-driven photocathode) operate at currents in excess of 10 mA while keeping the effects of condenser lens aberrations to a minimum. This modification allows real-space imaging of material microstructure with a resolution of order 10 nm over regions several {micro}m across with an exposure time of 15 ns. This is more than 6 orders of magnitude faster than typical video-rate TEM imaging. The key is the addition of a weak magnetic lens to couple the large-diameter high-current beam exiting the accelerator into the acceptance aperture of a conventional TEM condenser lens system. We show that the performance of the system is essentially consistent with models derived from ray tracing and finite element simulations. The instrument can also be operated as a conventional TEM by using the electron gun in a thermionic mode. The modification enables very high electron current densities in {micro}m-sized areas and could also be used in a non-pulsed system for high-throughput imaging and analytical TEM.

Reed, B W; LaGrange, T; Shuttlesworth, R M; Gibson, D J; Campbell, G H; Browning, N D

2009-12-29T23:59:59.000Z

5

Transmission Electron Microscope and Scanning Electron Microscopes -  

NLE Websites -- All DOE Office Websites (Extended Search)

Facilities > Transmission Electron Facilities > Transmission Electron Microscope and Scanning Electron Microscopes FACILITIES Transmission Electron Microscope and Scanning Electron Microscopes Overview Other Facilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Transmission Electron Microscope and Scanning Electron Microscopes The research activities of the Corrosion and Mechanics of Materials Section are supported by complete metallography/sample preparation rooms equipped with several optical and electron microscopes: a Transmission Electron Microscope and two Scanning Electron Microscopes. Bookmark and Share Transmission electron microscope (TEM) Detail of JEOL 100CXII TEM Figure 1: Detail of JEOL 100CXII TEM. Click on image to view larger image.

6

Dynamic Processes in Biology, Chemistry, and Materials Science: Opportunities for UltraFast Transmission Electron Microscopy - Workshop Summary Report  

SciTech Connect

This report summarizes a 2011 workshop that addressed the potential role of rapid, time-resolved electron microscopy measurements in accelerating the solution of important scientific and technical problems. A series of U.S. Department of Energy (DOE) and National Academy of Science workshops have highlighted the critical role advanced research tools play in addressing scientific challenges relevant to biology, sustainable energy, and technologies that will fuel economic development without degrading our environment. Among the specific capability needs for advancing science and technology are tools that extract more detailed information in realistic environments (in situ or operando) at extreme conditions (pressure and temperature) and as a function of time (dynamic and time-dependent). One of the DOE workshops, Future Science Needs and Opportunities for Electron Scattering: Next Generation Instrumentation and Beyond, specifically addressed the importance of electron-based characterization methods for a wide range of energy-relevant Grand Scientific Challenges. Boosted by the electron optical advancement in the last decade, a diversity of in situ capabilities already is available in many laboratories. The obvious remaining major capability gap in electron microscopy is in the ability to make these direct in situ observations over a broad spectrum of fast (µs) to ultrafast (picosecond [ps] and faster) temporal regimes. In an effort to address current capability gaps, EMSL, the Environmental Molecular Sciences Laboratory, organized an Ultrafast Electron Microscopy Workshop, held June 14-15, 2011, with the primary goal to identify the scientific needs that could be met by creating a facility capable of a strongly improved time resolution with integrated in situ capabilities. The workshop brought together more than 40 leading scientists involved in applying and/or advancing electron microscopy to address important scientific problems of relevance to DOE’s research mission. This workshop built on previous workshops and included three breakout sessions identifying scientific challenges in biology, biogeochemistry, catalysis, and materials science frontier areas of fundamental science that underpin energy and environmental science that would significantly benefit from ultrafast transmission electron microscopy (UTEM). In addition, the current status of time-resolved electron microscopy was examined, and the technologies that will enable future advances in spatio-temporal resolution were identified in a fourth breakout session.

Kabius, Bernd C.; Browning, Nigel D.; Thevuthasan, Suntharampillai; Diehl, Barbara L.; Stach, Eric A.

2012-07-25T23:59:59.000Z

7

Instrument Series: Microscopy Environmental Transmission Electron Microscope  

NLE Websites -- All DOE Office Websites (Extended Search)

Environmental Transmission Environmental Transmission Electron Microscope EMSL's environmental transmission electron microscope (ETEM) provides in situ capabilities that enable atomic-resolution imaging and spectroscopic studies of materials under dynamic operating conditions. In contrast to traditional operation of TEM under high vacuum, EMSL's ETEM uniquely allows imaging within high- temperature and gas environments-with a gas pressure up to 20 Torr. With a spherical aberration corrector for the objective lens, the ETEM captures atomic-level processes as they occur, enabling vital research across a range of scientific fields. Research Applications Chemical science and engineering - providing in situ observation of catalytic processes with atomic-level resolution Materials science and engineering - allowing

8

Scanning/Transmission Electron Microscopes  

NLE Websites -- All DOE Office Websites (Extended Search)

ScanningTransmission Electron Microscopes Nion UltraSTEM 60-100 dedicated aberration-corrected STEM for low- to mid-voltage operation and Enfina EELS Contact: Juan-Carlos Idrobo,...

9

Transmission Electron Microscopy Studies on Lithium Battery ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2012 TMS Annual Meeting & Exhibition. Symposium , Energy Nanomaterials. Presentation Title, Transmission Electron Microscopy ...

10

Electronics and hydraulics control transmission  

SciTech Connect

Caterpillar engineers have combined electronics and hydraulics for improved transmission control and productivity. The control system had extensive field test experience during development. The system accumulated more than 100,000 hours on 17 vehicles, with individual vehicle times in the 2000-10,000-hour range. Job sites were chosen to test the system over a wide range of applications and locales. The EPTC components are CAT-designed and made by outside suppliers. The components must comply with CAT designs and specifications. All components are 100% functionally tested. The control box is computer-tested functionally at the supplier and at CAT before vehicle installation.

Morris, H.C.; Sorrells, G.K.

1986-04-01T23:59:59.000Z

11

Transmission Electron Microscopy Study of InN Nanorods  

E-Print Network (OSTI)

Transmission Electron Microscopy Study of InN Nanorods Z.epitaxy and studied by transmission electron microscopy,establish their quality. Transmission electron microscopy (

Liliental-Weber, Z.; Li, X.; Kryliouk, Olga; Park, H.J.; Mangum, J.; Anderson, T.

2008-01-01T23:59:59.000Z

12

Iran Thomas Auditorium, 8600 Environmental Transmission Electron...  

NLE Websites -- All DOE Office Websites (Extended Search)

April 26, 2012 11:00 am Iran Thomas Auditorium, 8600 Environmental Transmission Electron Microscopy for Catalysis Research: The Example of Carbon Nanotubes Eric A. Stach Center for...

13

Available Technologies: Transmission Electron Microscope Phase ...  

Robert Glaeser and Jian Jin have developed an apparatus that can be integrated into transmission electron microscopes (TEMs) to enable high contrast imaging of weak ...

14

TUTORIALS: Introduction to Conventional Transmission Electron ...  

Science Conference Proceedings (OSTI)

Jul 2, 2008 ... The link provided accesses the web site for the text, Introduction to Conventional Transmission Electron Microscopy by Marc DeGraef. The site ...

15

Frontiers of In Situ Transmission Electron Microscopy  

Science Conference Proceedings (OSTI)

... significance and versatility of in situ transmission electron microscopy (TEM) has ... applied stimulus is observed as it happens inside the microscope. ...

2013-05-29T23:59:59.000Z

16

Defect microstructural evolution in ion irradiated metallic nanofoils: Kinetic Monte Carlo simulation versus cluster dynamics modeling and in situ transmission electron microscopy experiments  

SciTech Connect

Understanding materials degradation under intense irradiation is important for the development of next generation nuclear power plants. Here we demonstrate that defect microstructural evolution in molybdenum nanofoils in situ irradiated and observed on a transmission electron microscope can be reproduced with high fidelity using an object kinetic Monte Carlo (OKMC) simulation technique. Main characteristics of defect evolution predicted by OKMC, namely, defect density and size distribution as functions of foil thickness, ion fluence and flux, are in excellent agreement with those obtained from the in situ experiments and from previous continuum-based cluster dynamics modeling. The combination of advanced in situ experiments and high performance computer simulation/modeling is a unique tool to validate physical assumptions/mechanisms regarding materials response to irradiation, and to achieve the predictive power for materials stability and safety in nuclear facilities.

Xu Donghua; Wirth, Brian D. [Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States); Li Meimei [Division of Nuclear Engineering, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Kirk, Marquis A. [Division of Materials Science, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2012-09-03T23:59:59.000Z

17

Transmission electron microscope CCD camera  

DOE Patents (OSTI)

In order to improve the performance of a CCD camera on a high voltage electron microscope, an electron decelerator is inserted between the microscope column and the CCD. This arrangement optimizes the interaction of the electron beam with the scintillator of the CCD camera while retaining optimization of the microscope optics and of the interaction of the beam with the specimen. Changing the electron beam energy between the specimen and camera allows both to be optimized.

Downing, Kenneth H. (Lafayette, CA)

1999-01-01T23:59:59.000Z

18

Scanning Transmission Electron Microscopy Investigations of Complex...  

NLE Websites -- All DOE Office Websites (Extended Search)

Scanning Transmission Electron Microscopy Investigations of Complex Oxides Monday, May 23, 2011 - 3:30pm SSRL Conference room 137-322 Professor Tom Vogt, NanoCenter & Department of...

19

Ponderomotive phase plate for transmission electron microscopes  

Science Conference Proceedings (OSTI)

A ponderomotive phase plate system and method for controllably producing highly tunable phase contrast transfer functions in a transmission electron microscope (TEM) for high resolution and biological phase contrast imaging. The system and method includes a laser source and a beam transport system to produce a focused laser crossover as a phase plate, so that a ponderomotive potential of the focused laser crossover produces a scattering-angle-dependent phase shift in the electrons of the post-sample electron beam corresponding to a desired phase contrast transfer function.

Reed, Bryan W. (Livermore, CA)

2012-07-10T23:59:59.000Z

20

Atmospheric pressure scanning transmission electron microscopy  

SciTech Connect

Scanning transmission electron microscope (STEM) images of gold nanoparticles (2.1 nm average diameter) at atmospheric pressure have been recorded through a 0.36 mm thick mixture of CO, O2 and He. This was accomplished using a reaction cell consisting of two electron-transparent silicon nitride membranes mounted on a specially designed specimen rod. Gas flow occurred through plastic tubing from the outside of the microscope to the specimen region and back. Gold nanoparticles of a full width half maximum diameter of 1.0 nm were visible above the background noise and the achieved resolution was 0.5 nm in accordance with calculations of the beam broadening.

De Jonge, Niels [ORNL; Veith, Gabriel M [ORNL; Bigelow, Wilbur C [ORNL

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Nonlinear transmission line based electron beam driver  

Science Conference Proceedings (OSTI)

Gated field emission cathodes can provide short electron pulses without the requirement of laser systems or cathode heating required by photoemission or thermionic cathodes. The large electric field requirement for field emission to take place can be achieved by using a high aspect ratio cathode with a large field enhancement factor which reduces the voltage requirement for emission. In this paper, a cathode gate driver based on the output pulse train from a nonlinear transmission line is experimentally demonstrated. The application of the pulse train to a tufted carbon fiber field emission cathode generates short electron pulses. The pulses are approximately 2 ns in duration with emission currents of several mA, and the train contains up to 6 pulses at a frequency of 100 MHz. Particle-in-cell simulation is used to predict the characteristic of the current pulse train generated from a single carbon fiber field emission cathode using the same technique.

French, David M.; Hoff, Brad W.; Tang Wilkin; Heidger, Susan; Shiffler, Don [Directed Energy Directorate, Air Force Research Laboratory, Kirtland AFB, New Mexico 87117 (United States); Allen-Flowers, Jordan [Program in Applied Mathematics, University of Arizona, Tucson, Arizona 85721 (United States)

2012-12-15T23:59:59.000Z

22

In Situ Aberration-Corrected Scanning Transmission Electron ...  

Science Conference Proceedings (OSTI)

Using real-time transmission electron microscopy (TEM) at atomic resolutions should shed light into some of the fundamental questions in this field.

23

High Contrast Hollow-Cone Dark Field Transmission Electron ...  

Science Conference Proceedings (OSTI)

For nanocrystalline materials, the scale of grain size necessitates the use of transmission electron microscopy (TEM) for quantification. Given the complex ...

24

In Situ Transmission Electron Microscopy Studies of Size  

Science Conference Proceedings (OSTI)

Using in situ transmission electron microscopy (TEM) nanocompression testing, we ... Ab Initio DFT Modeling of the Dislocation and Its Mobility in TiN Ceramic.

25

Frontiers of In Situ Transmission Electron Microscopy  

Science Conference Proceedings (OSTI)

... Direct detection cameras form electron images by directly detecting high energy electrons incident on an active pixel CMOS (complementary metal ...

2013-05-29T23:59:59.000Z

26

Atom Probe Tomography and Transmission Electron Microscopy ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Atom probe tomography (APT) and analytical transmission .... of a Leaking Type 316 Socket Weld in a Boron Injection Tank Sampling Line.

27

Dynamics of Transmission Provision in a Competitive PowerIndustry  

Science Conference Proceedings (OSTI)

The main objective of this paper is to revisit the operations and planning of an electric power system, and, more specifically, of its transmission system. The intent is to formulate the underlying problems as decision-making problems with specific ... Keywords: competition, discrete event dynamic systems, dynamic programming, electric power systems, optimal stochastic control, transmission

Chien-Ning Yu; Jean-Pierre Leotard; Marija D. Ilic

1999-11-01T23:59:59.000Z

28

Transmission Line Technology for Electron Cyclotron Heating  

Science Conference Proceedings (OSTI)

Technical Paper / Special Issue on Electron Cyclotron Wave Physics, Technology, and Applications - Part 2

J. L. Doane; R. A. Olstad

29

The TE Wave Transmission Method for Electron Cloud Measurements at Cesr-TA  

E-Print Network (OSTI)

CBP-836 THE TE WAVE TRANSMISSION METHOD FOR ELECTRON CLOUDobtained using the TE transmission technique described inBesides the TE transmission method in its initial

Desantis, S.

2010-01-01T23:59:59.000Z

30

Scanning transmission electron microscopy of gate stacks with HfO2 dielectrics and TiN electrodes  

E-Print Network (OSTI)

Scanning transmission electron microscopy of gate stacksEELS) in scanning transmission electron microscopy were usedWe use scanning transmission electron microscopy (STEM)

Agustin, Melody P.; Fonseca, Leo R. C.; Hooker, Jacob C.; Stemmer, Susanne

2005-01-01T23:59:59.000Z

31

Scanning Transmission Electron Microscopy Investigations of Complex Oxides  

NLE Websites -- All DOE Office Websites (Extended Search)

Scanning Transmission Electron Microscopy Investigations of Complex Oxides Scanning Transmission Electron Microscopy Investigations of Complex Oxides Monday, May 23, 2011 - 3:30pm SSRL Conference room 137-322 Professor Tom Vogt, NanoCenter & Department of Chemistry, University of South Carolina High-Angle-Annular-Dark-Field/Scanning Transmission Electron Microscopy (HAADF/STEM) is a technique uniquely suited for detailed studies of the structure and composition of complex oxides. The HAADF detector collects electrons which have interact inelastically with the potentials of the atoms in the specimen and therefore resembles the better known Z2 (Z is atomic number) Rutherford scattering. One class of important catalysts consists of bronzes based on pentagonal {Mo6O21} building units; these include Mo5O14 and Mo17O47. In the last 20 years, new materials doped with

32

Visualizing Macromolecular Complexes with In Situ Liquid Scanning Transmission Electron Microscopy  

SciTech Connect

A central focus of biological research is understanding the structure/function relationship of macromolecular protein complexes. Yet conventional transmission electron microscopy techniques are limited to static observations. Here we present the first direct images of purified macromolecular protein complexes using in situ liquid scanning transmission electron microscopy. Our results establish the capability of this technique for visualizing the interface between biology and nanotechnology with high fidelity while also probing the interactions of biomolecules within solution. This method represents an important advancement towards allowing future high-resolution observations of biological processes and conformational dynamics in real-time.

Evans, James E.; Jungjohann, K. L.; Wong, Peony C. K.; Chiu, Po-Lin; Dutrow, Gavin H.; Arslan, Ilke; Browning, Nigel D.

2012-11-01T23:59:59.000Z

33

Power electronics in electric utilities: HVDC power transmission systems  

SciTech Connect

High Voltage Direct Current (HVDC) power transmission systems constitute an important application of power electronics technology. This paper reviews salient aspects of this growing industry. The paper summarizes the history of HVDC transmission and discusses the economic and technical reasons responsible for development of HVDC systems. The paper also describes terminal design and basic configurations of HVDC systems, as well as major equipments of HVDC transmission system. In this regard, the state-of-the-art technology in the equipments constructions are discussed. Finally, the paper reviews future developments in the HVDC transmission systems, including promising technologies, such as multiterminal configurations, Gate Turn-Off (GTO) devices, forced commutation converters, and new advances in control electronics.

Nozari, F.; Patel, H.S.

1988-04-01T23:59:59.000Z

34

Power Electronics-Based Transmission Controllers Reference Book  

Science Conference Proceedings (OSTI)

EPRI is sponsoring development of a first edition of the EPRI Power Electronics-Based Transmission Controllers Reference Book. The book will provide a broad overview on power electronics-based controllers—with information on historical perspectives, basic design considerations, factory testing, site installations, commissioning, operating performance, operation and maintenance, and future trends. The document will assist users in planning, developing, installing, and utilizing this technology.

2005-12-02T23:59:59.000Z

35

Foucault imaging by using non-dedicated transmission electron microscope  

Science Conference Proceedings (OSTI)

An electron optical system for observing Foucault images was constructed using a conventional transmission electron microscope without any special equipment for Lorentz microscopy. The objective lens was switched off and an electron beam was converged by a condenser optical system to the crossover on the selected area aperture plane. The selected area aperture was used as an objective aperture to select the deflected beam for Foucault mode, and the successive image-forming lenses were controlled for observation of the specimen images. The irradiation area on the specimen was controlled by selecting the appropriate diameter of the condenser aperture.

Taniguchi, Yoshifumi [Science and Medical Systems Business Group, Hitachi High-Technologies Corp., Ichige, Hitachinaka, Ibaraki 312-8504 (Japan); Matsumoto, Hiroaki [Corporate Manufacturing Strategy Group, Hitachi High-Technologies Corp., Ishikawa-cho, Hitachinaka, Ibaraki 312-1991 (Japan); Harada, Ken [Central Research Laboratory, Hitachi Ltd., Hatoyama, Saitama 350-0395 (Japan)

2012-08-27T23:59:59.000Z

36

Transmission of electron through monolayer graphene laser barrier  

Science Conference Proceedings (OSTI)

The present theoretical model deals with the transmission property of the Dirac fermions in the Floquet sidebands for the laser radiated graphene nanostructure. The laser assisted structure behaves as a tunneling barrier that leads to asymmetric transmission around the normal to the interface and is capable to confine the massless Dirac particles in a monolayer graphene strip. The absence of the Klein tunneling and the presence of a large number of controlling parameters would make the time dependent vector potential barrier superior over the electrostatic and magnetic barriers towards the opto-electronic device fabrication.

Sinha, C. [Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India); Biswas, R. [Department of Physics, P. K. College, Contai, Purba Medinipur, West Bengal 721401 (India)

2012-04-30T23:59:59.000Z

37

In Situ Transmission Electron Microscopy Characterization of Nanomaterials  

E-Print Network (OSTI)

With the recent development of in situ transmission electron microscopy (TEM) characterization techniques, the real time study of property-structure correlations in nanomaterials becomes possible. This dissertation reports the direct observations of deformation behavior of Al2O3-ZrO2-MgAl2O4 (AZM) bulk ceramic nanocomposites, strengthening mechanism of twins in YBa2Cu3O7-x (YBCO) thin film, work hardening event in nanocrystalline nickel and deformation of 2wt% Al doped ZnO (AZO) thin film with nanorod structures using the in situ TEM nanoindentation tool. The combined in situ movies with quantitative loading-unloading curves reveal the deformation mechanism of the above nanomaterial systems. At room temperature, in situ dynamic deformation studies show that the AZM nanocomposites undergo the deformation mainly through the grain-boundary sliding and rotation of small grains, i.e., ZrO2 grains, and some of the large grains, i.e., MgAl2O4 grains. We observed both plastic and elastic deformations in different sample regions in these multi-phase ceramic nanocomposites at room temperature. Both ex situ (conventional) and in situ nanoindentation were conducted to reveal the deformation of YBCO films from the directions perpendicular and parallel to the twin interfaces. Hardness measured perpendicular to twin interfaces is ~50% and 40% higher than that measured parallel to twin interfaces, by ex situ and in situ, respectively. By using an in situ nanoindentation tool inside TEM, dynamic work hardening event in nanocrystalline nickel was directly observed. During stain hardening stage, abundant Lomer-Cottrell (L-C) locks formed both within nanograins and against twin boundaries. Two major mechanisms were identified during interactions between L-C locks and twin boundaries. Quantitative nanoindentation experiments recorded during in situ experiments show an increase of yield strength from 1.64 to 2.29 GPa during multiple loading-unloading cycles. In situ TEM nanoindentation has been conducted to explore the size dependent deformation behavior of two different types (type I: ~ 0.51 of width/length ratio and type II: ~ 088 ratio) of AZO nanorods. During the indentation on type I nanord structure, annihilation of defects has been observed which is caused by limitation of the defect activities by relatively small size of the width. On the other hand, type II nanorod shows dislocation activities which enhanced the grain rotation under the external force applied on more isotropic direction through type II nanorod.

Lee, Joon Hwan 1977-

2012-12-01T23:59:59.000Z

38

Resonance, particle dynamics, and particle transmission in the micro-accelerator platform  

Science Conference Proceedings (OSTI)

We describe particle dynamics in the Micro-Accelerator Platform (MAP), a slab-symmetric dielectric laser accelerator (DLA), and model the expected performance of recently fabricated MAP structures. The quality of the structure resonances has been characterized optically, and results are compared with simulation. 3D trajectory analysis is used to model acceleration in those same structures 'as built.' Results are applied to ongoing beam transmission and acceleration tests at NLCTA/E-163, in which transmission of 60 MeV injected electrons through the beam channel of the MAP was clearly observed, despite the overfilling of the structure by the beam.

McNeur, J.; Hazra, K. S.; Liu, G.; Sozer, E. B.; Travish, G.; Yoder, R. B. [UCLA Dept. of Physics and Astronomy, Los Angeles, CA 90095 (United States); Manhattanville College, Physics Dept., 2900 Purchase St., Purchase, NY 10577 (United States)

2012-12-21T23:59:59.000Z

39

Precision electron flow measurements in a disk transmission line.  

SciTech Connect

An analytic model for electron flow in a system driving a fixed inductive load is described and evaluated with particle in cell simulations. The simple model allows determining the impedance profile for a magnetically insulated transmission line given the minimum gap desired, and the lumped inductance inside the transition to the minimum gap. The model allows specifying the relative electron flow along the power flow direction, including cases where the fractional electron flow decreases in the power flow direction. The electrons are able to return to the cathode because they gain energy from the temporally rising magnetic field. The simulations were done with small cell size to reduce numerical heating. An experiment to compare electron flow to the simulations was done. The measured electron flow is {approx}33% of the value from the simulations. The discrepancy is assumed to be due to a reversed electric field at the cathode because of the inductive load and falling electron drift velocity in the power flow direction. The simulations constrain the cathode electric field to zero, which gives the highest possible electron flow.

Clark, Waylon T.; Pelock, Michael D.; Martin, Jeremy Paul; Jackson, Daniel Peter Jr.; Savage, Mark Edward; Stoltzfus, Brian Scott; Mendel, Clifford Will, Jr.; Pointon, Timothy David

2008-01-01T23:59:59.000Z

40

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integrated Integrated Dynamic Electron Solutions, Inc. America's Next Top Energy Innovator Challenge 333 likes Integrated Dynamic Electron Solutions, Inc. Lawrence Livermore National Laboratory Dynamic Transmission Electron Microscopes DTEM reveal unprecedented details of the mechanisms underlying a host of nanoscale systems that are at the core of our current and future energy economy. A vast and growing number of materials utilized in the energy sector rely on nanostructured materials and their unique dynamic behaviors. DTEM offers researchers the ability to directly interrogate these materials at time and length scales that to-date have either been impossible to access or required the use of multi-billion dollar synchrotrons. DTEM will fundamentally change the approach to basic and applied research in the

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integrated Integrated Dynamic Electron Solutions, Inc. America's Next Top Energy Innovator Challenge 333 likes Integrated Dynamic Electron Solutions, Inc. Lawrence Livermore National Laboratory Dynamic Transmission Electron Microscopes DTEM reveal unprecedented details of the mechanisms underlying a host of nanoscale systems that are at the core of our current and future energy economy. A vast and growing number of materials utilized in the energy sector rely on nanostructured materials and their unique dynamic behaviors. DTEM offers researchers the ability to directly interrogate these materials at time and length scales that to-date have either been impossible to access or required the use of multi-billion dollar synchrotrons. DTEM will fundamentally change the approach to basic and applied research in the

42

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integrated Integrated Dynamic Electron Solutions, Inc. America's Next Top Energy Innovator Challenge 333 likes Integrated Dynamic Electron Solutions, Inc. Lawrence Livermore National Laboratory Dynamic Transmission Electron Microscopes DTEM reveal unprecedented details of the mechanisms underlying a host of nanoscale systems that are at the core of our current and future energy economy. A vast and growing number of materials utilized in the energy sector rely on nanostructured materials and their unique dynamic behaviors. DTEM offers researchers the ability to directly interrogate these materials at time and length scales that to-date have either been impossible to access or required the use of multi-billion dollar synchrotrons. DTEM will fundamentally change the approach to basic and applied research in the

43

NDN, volume transmission, and self-organization in brain dynamics  

E-Print Network (OSTI)

NDN, VOLUME TRANSMISSION, AND SELF- ORGANIZATION IN BRAINThese systems instantiate volume transmission bynonsynaptic diffusion transmission, in concert with the

Freeman, Walter J III

2005-01-01T23:59:59.000Z

44

Electron flow stability in magnetically insulated vacuum transmission lines.  

Science Conference Proceedings (OSTI)

We evaluate the stability of electron current flow in high-power magnetically insulated transmission lines (MITLs). A detailed model of electron flow in cross-field gaps yields a dispersion relation for electromagnetic (EM) transverse magnetic waves [R. C. Davidson et al., Phys. Fluids 27, 2332 (1984)] which is solved numerically to obtain growth rates for unstable modes in various sheath profiles. These results are compared with two-dimensional (2D) EM particle-in-cell (PIC) simulations of electron flow in high-power MITLs. We find that the macroscopic properties (charge and current densities and self-fields) of the equilibrium profiles observed in the simulations are well represented by the laminar-flow model of Davidson et al. Idealized simulations of sheared flow in electron sheaths yield growth rates for both long (diocotron) and short (magnetron) wavelength instabilities that are in good agreement with the dispersion analysis. We conclude that electron sheaths that evolve self-consistently from space-charged-limited emission of electrons from the cathode in well-resolved 2D EM PIC simulations form stable profiles.

Genoni, Thomas C. (Voss Scientific, LLC, Albuquerque, NM); Stygar, William A.; Welch, Dale Robert (Voss Scientific, LLC, Albuquerque, NM); Clark, R. E. (Voss Scientific, LLC, Albuquerque, NM); Rose, David V. (Voss Scientific, LLC, Albuquerque, NM)

2010-11-01T23:59:59.000Z

45

Dynamic Power Flow Controller: Compact Dynamic Phase Angle Regulators for Transmission Power Routing  

SciTech Connect

GENI Project: Varentec is developing compact, low-cost transmission power controllers with fractional power rating for controlling power flow on transmission networks. The technology will enhance grid operations through improved use of current assets and by dramatically reducing the number of transmission lines that have to be built to meet increasing contributions of renewable energy sources like wind and solar. The proposed transmission controllers would allow for the dynamic control of voltage and power flow, improving the grid’s ability to dispatch power in real time to the places where it is most needed. The controllers would work as fail-safe devices whereby the grid would be restored to its present operating state in the event of a controller malfunction instead of failing outright. The ability to affordably and dynamically control power flow with adequate fail-safe switchgear could open up new competitive energy markets which are not possible under the current regulatory structure and technology base.

None

2012-01-03T23:59:59.000Z

46

A versatile three-contact electrical biasing transmission electron microscope specimen holder for electron holography and electron tomography of working devices  

E-Print Network (OSTI)

A versatile three-contact electrical biasing transmission electron microscope specimen holder to characterize nanoscale materials and devices under operating conditions in the transmission electron microscope in the transmission electron microscope (TEM) at a spatial resolution that can approach the nanometer scale

Dunin-Borkowski, Rafal E.

47

Robust atomic resolution imaging of light elements using scanning transmission electron microscopy  

SciTech Connect

We show that an annular detector placed within the bright field cone in scanning transmission electron microscopy allows direct imaging of light elements in crystals. In contrast to common high angle annular dark field imaging, both light and heavy atom columns are visible simultaneously. In contrast to common bright field imaging, the images are directly and robustly interpretable over a large range of thicknesses. We demonstrate this through systematic simulations and present a simple physical model to obtain some insight into the scattering dynamics.

Findlay, S. D. [Institute of Engineering Innovation, School of Engineering, University of Tokyo, Tokyo 113-8656 (Japan); Shibata, N. [Institute of Engineering Innovation, School of Engineering, University of Tokyo, Tokyo 113-8656 (Japan); PRESTO, Japan Science and Technology Agency, Saitama 332-0012 (Japan); Sawada, H.; Okunishi, E.; Kondo, Y. [JEOL Ltd., Tokyo 196-8558 (Japan); Yamamoto, T. [Institute of Engineering Innovation, School of Engineering, University of Tokyo, Tokyo 113-8656 (Japan); Nanostructures Research Laboratory, Japan Fine Ceramic Center, Nagoya 456-8587 (Japan); Ikuhara, Y. [Institute of Engineering Innovation, School of Engineering, University of Tokyo, Tokyo 113-8656 (Japan); Nanostructures Research Laboratory, Japan Fine Ceramic Center, Nagoya 456-8587 (Japan); WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)

2009-11-09T23:59:59.000Z

48

Transmission electron microscope sample holder with optical features  

DOE Patents (OSTI)

A sample holder for holding a sample to be observed for research purposes, particularly in a transmission electron microscope (TEM), generally includes an external alignment part for directing a light beam in a predetermined beam direction, a sample holder body in optical communication with the external alignment part and a sample support member disposed at a distal end of the sample holder body opposite the external alignment part for holding a sample to be analyzed. The sample holder body defines an internal conduit for the light beam and the sample support member includes a light beam positioner for directing the light beam between the sample holder body and the sample held by the sample support member.

Milas, Mirko (Port Jefferson, NY); Zhu, Yimei (Stony Brook, NY); Rameau, Jonathan David (Coram, NY)

2012-03-27T23:59:59.000Z

49

Scanning transmission electron microscopy strain measurement from millisecond frames of a direct electron charge coupled device  

Science Conference Proceedings (OSTI)

A high-speed direct electron detection system is introduced to the field of transmission electron microscopy and applied to strain measurements in semiconductor nanostructures. In particular, a focused electron probe with a diameter of 0.5 nm was scanned over a fourfold quantum layer stack with alternating compressive and tensile strain and diffracted discs have been recorded on a scintillator-free direct electron detector with a frame time of 1 ms. We show that the applied algorithms can accurately detect Bragg beam positions despite a significant point spread each 300 kV electron causes during detection on the scintillator-free camera. For millisecond exposures, we find that strain can be measured with a precision of 1.3 Multiplication-Sign 10{sup -3}, enabling, e.g., strain mapping in a 100 Multiplication-Sign 100 nm{sup 2} region with 0.5 nm resolution in 40 s.

Mueller, Knut; Rosenauer, Andreas [Institut fuer Festkoerperphysik, Universitaet Bremen, Otto-Hahn-Allee 1, 28359 Bremen (Germany); Ryll, Henning; Ordavo, Ivan; Ihle, Sebastian; Soltau, Heike [PNSensor GmbH, Roemerstrasse 28, 80803 Muenchen (Germany); Strueder, Lothar [Max-Planck-Institut Halbleiterlabor, Otto-Hahn-Ring 6, 81739 Muenchen (Germany); Volz, Kerstin [Materials Science Center and Faculty of Physics, Philipps Universitaet Marburg, Hans-Meerwein-Strasse, 35032 Marburg (Germany); Zweck, Josef [Institut fuer Experimentelle und Angewandte Physik, Universitaet Regensburg, Universitaetsstrasse 31, 93040 Regensburg (Germany)

2012-11-19T23:59:59.000Z

50

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integrated Dynamic Electron Solutions, Inc. America's Next Top Energy Innovator Challenge 333 likes Integrated Dynamic Electron Solutions, Inc. Lawrence Livermore National...

51

Atomic-Scale Imaging and Spectroscopy for In Situ Liquid Scanning Transmission Electron Microscopy  

Science Conference Proceedings (OSTI)

Observation of growth, synthesis, dynamics and electrochemical reactions in the liquid state is an important yet largely unstudied aspect of nanotechnology. The only techniques that can potentially provide the insights necessary to advance our understanding of these mechanisms is simultaneous atomic-scale imaging and quantitative chemical analysis (through spectroscopy) under environmental conditions in the transmission electron microscope (TEM). In this study we describe the experimental and technical conditions necessary to obtain electron energy loss (EEL) spectra from a nanoparticle in colloidal suspension using aberration corrected scanning transmission electron microscopy (STEM) combined with the environmental liquid stage. At a fluid path length below 400 nm, atomic resolution images can be obtained and simultaneous compositional analysis can be achieved. We show that EEL spectroscopy can be used to quantify the total fluid path length around the nanoparticle, and demonstrate characteristic core-loss signals from the suspended nanoparticles can be resolved and analyzed to provide information on the local interfacial chemistry with the surrounding environment. The combined approach using aberration corrected STEM and EEL spectra with the in situ fluid stage demonstrates a plenary platform for detailed investigations of solution based catalysis and biological research.

Jungjohann, K. L.; Evans, James E.; Aguiar, Jeff; Arslan, Ilke; Browning, Nigel D.

2012-06-04T23:59:59.000Z

52

Transmission electron microscopy analysis of corroded metal waste forms.  

SciTech Connect

This report documents the results of analyses with transmission electron microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDS) and selected area electron diffraction (ED) of samples of metallic waste form (MWF) materials that had been subjected to various corrosion tests. The objective of the TEM analyses was to characterize the composition and microstructure of surface alteration products which, when combined with other test results, can be used to determine the matrix corrosion mechanism. The examination of test samples generated over several years has resulted in refinements to the TEM sample preparation methods developed to preserve the orientation of surface alteration layers and the underlying base metal. The preservation of microstructural spatial relationships provides valuable insight for determining the matrix corrosion mechanism and for developing models to calculate radionuclide release in repository performance models. The TEM results presented in this report show that oxide layers are formed over the exposed steel and intermetallic phases of the MWF during corrosion in aqueous solutions and humid air at elevated temperatures. An amorphous non-stoichiometric ZrO{sub 2} layer forms at the exposed surfaces of the intermetallic phases, and several nonstoichiometric Fe-O layers form over the steel phases in the MWF. These oxide layers adhere strongly to the underlying metal, and may be overlain by one or more crystalline Fe-O phases that probably precipitated from solution. The layer compositions are consistent with a corrosion mechanism of oxidative dissolution of the steel and intermetallic phases. The layers formed on the steel and intermetallic phases form a continuous layer over the exposed waste form, although vertical splits in the layer and corrosion in pits and crevices were seen in some samples. Additional tests and analyses are needed to verify that these layers passivate the underlying metals and if passivation can break down as the MWF corrodes. The importance of localized corrosion should also be determined.

Dietz, N. L.

2005-04-15T23:59:59.000Z

53

TRANSMISSION ELECTRON MICROSCOPY STUDY OF HELIUM BEARING FUSION WELDS  

DOE Green Energy (OSTI)

A transmission electron microscopy (TEM) study was conducted to characterize the helium bubble distributions in tritium-charged-and-aged 304L and 21Cr-6Ni-9Mn stainless steel fusion welds containing approximately 150 appm helium-3. TEM foils were prepared from C-shaped fracture toughness test specimens containing {delta} ferrite levels ranging from 4 to 33 volume percent. The weld microstructures in the low ferrite welds consisted mostly of austenite and discontinuous, skeletal {delta} ferrite. In welds with higher levels of {delta} ferrite, the ferrite was more continuous and, in some areas of the 33 volume percent sample, was the matrix/majority phase. The helium bubble microstructures observed were similar in all samples. Bubbles were found in the austenite but not in the {delta} ferrite. In the austenite, bubbles had nucleated homogeneously in the grain interiors and heterogeneously on dislocations. Bubbles were not found on any austenite/austenite grain boundaries or at the austenite/{delta} ferrite interphase interfaces. Bubbles were not observed in the {delta} ferrite because of the combined effects of the low solubility and rapid diffusion of tritium through the {delta} ferrite which limited the amount of helium present to form visible bubbles.

Tosten, M; Michael Morgan, M

2008-12-12T23:59:59.000Z

54

Cyclotron Resonances in Electron Cloud Dynamics  

Science Conference Proceedings (OSTI)

A new set of resonances for electron cloud dynamics in the presence of a magnetic field has been found. For short beam bunch lengths and low magnetic fields where lbstripes" found for non-resonant cases. Simulations with the 2D computer code POSINST, as well as a single-particle tracking code, were used to elucidate the physics of the dynamics. The existence of the resonances has been confirmed in experiments at PEP-II. The resonances are expected to affect the electron cloud dynamics in the fringe fields of conventional lattice magnets and in wigglers, where the magnetic fields are low. Results of the simulations and experimental observations, the reason for the bunch-length dependence, and details of the dynamics are discussed here.

Celata, C. M.; Furman, Miguel A.; Vay, J.-L.; Ng, J. S.T.; Grote, D. P.; Pivi, M. T. F.; Wang, L. F.

2009-04-29T23:59:59.000Z

55

Cyclotron Resonances in Electron Cloud Dynamics  

Science Conference Proceedings (OSTI)

A new set of resonances for electron cloud dynamics in the presence of a magnetic field has been found. For short beam bunch lengths and low magnetic fields where l{sub b} stripes' of multipactoring found for non-resonant cases. Simulations with the 2D computer code POSINST, as well as a single-particle tracking code, were used to elucidate the physics of the dynamics. The resonances are expected to affect the electron cloud dynamics in the fringe fields of conventional lattice magnets and in wigglers, where the magnetic fields are low. Results of the simulations, the reason for the bunch-length dependence, and details of the dynamics will be discussed.

Celata, C M; Furman, M A; Vay, J L; Grote, D P; Ng, J T; Pivi, M F; Wang, L F

2009-05-05T23:59:59.000Z

56

Hot electron dynamics in graphene  

Science Conference Proceedings (OSTI)

Graphene, a two-dimensional (2D) honeycomb structure allotrope of carbon atoms, has a long history since the invention of the pencil [Petroski (1989)] and the linear dispersion band structure proposed by Wallace [Wal]; however, only after Novoselov et al. successively isolated graphene from graphite [Novoselov et al. (2004)], it has been studied intensively during the recent years. It draws so much attentions not only because of its potential application in future electronic devices but also because of its fundamental properties: its quasiparticles are governed by the two-dimensional Dirac equation, and exhibit a variety of phenomena such as the anomalous integer quantum Hall effect (IQHE) [Novoselov et al. (2005)] measured experimentally, a minimal conductivity at vanishing carrier concentration [Neto et al. (2009)], Kondo effect with magnetic element doping [Hentschel and Guinea (2007)], Klein tunneling in p-n junctions [Cheianov and Fal’ko (2006), Beenakker (2008)], Zitterbewegung [Katsnelson (2006)], and Schwinger pair production [Schwinger (1951); Dora and Moessner (2010)]. Although both electron-phonon coupling and photoconductivity in graphene also draws great attention [Yan et al. (2007); Satou et al. (2008); Hwang and Sarma (2008); Vasko and Ryzhii (2008); Mishchenko (2009)], the nonequilibrium behavior based on the combination of electronphonon coupling and Schwinger pair production is an intrinsic graphene property that has not been investigated. Our motivation for studying clean graphene at low temperature is based on the following effect: for a fixed electric field, below a sufficiently low temperature linear eletric transport breaks down and nonlinear transport dominates. The criteria of the strength of this field [Fritz et al. (2008)] is eE = T2/~vF (1.1) For T >?eE~vF the system is in linear transport regime while for T electron distribution function can be associated with an effective temperature T? which exhibits a dependence on electric field E and electron-phonon coupling g: T? ? E1/4g(1.2) The anamolous exponent 1/4 may obtained from scaling. Meanwhile, yet we cannot obtain the distribution function, however, argument based on scaling gives us the current dependence on electric field: J ??Eg2 (1.3) which is a very different result compared with the results in which electrons do not experience scattering. This result provides us with important insighht into the correct nonequilibrium distribution function because now we know what the electric field dependence of current must be. Due to the applied field, the electronic system produces heat which prevents us from reaching a steady state. In order to remove Joule heat, we imagine that we have a graphene flake attached to a semiconductor substrate. Joule heat either transport to its environment or to the substrate as shown in 1.1. The red lines represent heat current flowing from high temperature sample to the low temperature reservoir. However, for a very large system, the temperature gradient is 0 in the plane so heat cannot be conducted outside in the horizontal direction, while the energy gap in semiconductor also forbids electron current from flowing into the substrate. But for phonon thermal current, the temperature gradient is large in the vertical direction, so heat can be transported into the substrate via phonons. There are two possible channels of phonon degrees of freedom, acoustic phonon and optical phonon. As we can see from Fig. 1.2 [Kusminskiy et al. (2009)], since the optical phonon excitation energy is too large for a low temperature system, it is note likely to be excited by the nonlinear electric field, so the possible way left is by electron-acoustic phonon scattering. Here acoustic phonon acts as a heat bath to absorb the Joule heat created by pair production process. Hence the scattering pro

Ling, Meng-Cheieh

2011-10-20T23:59:59.000Z

57

Cyclotron Resonances in Electron Cloud Dynamics  

SciTech Connect

A new set of resonances for electron cloud dynamics in the presence of a magnetic field has been found. For short beam bunch lengths and low magnetic fields where lb<< 2pi c/omega c (with lb = bunch length, omega c = non-relativistic cyclotron frequency) resonances between the bunch frequency and harmonics of the electron cyclotron frequency cause an increase in the electron cloud density in narrow ranges of magnetic field near the resonances. For ILC parameters the increase in the density is up to a factor ~;;3, and the spatial distribution of the electrons is broader near resonances, lacking the well-defined vertical density"stripes" found for non-resonant cases. Simulations with the 2D computer code POSINST, as well as a single-particle tracking code, were used to elucidate the physics of the dynamics. The existence of the resonances has been confirmed in experiments at PEP-II. The resonances are expected to affect the electron cloud dynamics in the fringe fields of conventional lattice magnets and in wigglers, where the magnetic fields are low. Results of the simulations and experimental observations, the reason for the bunch-length dependence, and details of the dynamics are discussed here.

Celata, C. M.; Furman, Miguel A.; Vay, J.-L.; Ng, J. S.T.; Grote, D. P.; Pivi, M. T. F.; Wang, L. F.

2009-04-29T23:59:59.000Z

58

Soliton propagation, reflection, and transmission in an inhomogeneous plasma with trapped electrons  

Science Conference Proceedings (OSTI)

Transmission and reflection of solitons from a semitransparent grid in an inhomogeneous plasma in the presence of trapped electrons is studied analytically. Conditions are obtained for the obliqueness of the propagation and the drift velocity of ions for the soliton transmission and reflection. Also, a transmission-reflection conservation law is derived. The contribution of trapped electrons to the solitons' propagation and their reflection and transmission is examined through energy, amplitude, and width of the solitons, in addition to the effect of temperature and drift of the ions.

Aziz, Farah; Malik, Hitendra K.; Stroth, Ulrich [Institut fuer Plasmaforschung, Universitaet Stuttgart, 70569 Stuttgart (Germany)

2011-04-15T23:59:59.000Z

59

Cyclotron Resonances in Electron Cloud Dynamics  

SciTech Connect

A new set of resonances for electron cloud dynamics in the presence of a magnetic field has been found. For short beam bunch lengths and low magnetic fields where l{sub b} << 2{pi}{omega}{sub c}, (l{sub b} = bunch duration, {omega}{sub c} = non-relativistic cyclotron frequency) resonances between the bunch frequency and harmonics of the cyclotron frequency cause an increase in the electron cloud density in narrow ranges of magnetic field near the resonances. For ILC parameters the increase in the density is up to a factor {approx} 3, and the spatial distribution of the electrons is broader near resonances, lacking the well-defined density 'stripes' of multipactoring found for non-resonant cases. Simulations with the 2D computer code POSINST, as well as a single-particle tracking code, were used to elucidate the physics of the dynamics. The resonances are expected to affect the electron cloud dynamics in the fringe fields of conventional lattice magnets and in wigglers, where the magnetic fields are low. Results of the simulations, the reason for the bunch-length dependence, and details of the dynamics will be discussed.

Celata, C M; Furman, M A; Vay, J L; Grote, D P; Ng, J T; Pivi, M F; Wang, L F

2009-05-05T23:59:59.000Z

60

Dynamic Simulation of Lightning Attachment to Earthed Overhead Transmission Line Structures  

Science Conference Proceedings (OSTI)

In this paper a novel method is presented to investigate lightning stroke attachment to earthed overhead transmission line structures. This method is based on the dynamic simulation of lightning downward leader movement toward the ground in three dimensions. ... Keywords: charge simulation method, downward leader, lightning, transmission line, upward leader

Mohammad Reza Bank Tavakoli; Behrooz Vahidi

2010-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Dynamic and Electronic Transport Properties of DNA Translocation through Graphene Nanopores  

E-Print Network (OSTI)

containing the pore in a 2 Ã? 2 grid arrangement. In addition to the dynamic analysis, we carried electronic. The transmission obtained along the graphene sensor at the Fermi level is affected by the presence of the DNA nano- pores generated with -hemolysin protein were used to map the DNA sequence as the molecule

Cuniberti, Gianaurelio

62

CFN | Hitachi HD2700C Scanning Transmission Electron Microscope  

NLE Websites -- All DOE Office Websites (Extended Search)

compositional and electronic information. Here is an example of EELS-2D mapping on Li-battery electrode materials as how Li and Fe elements distributed at nanometer scale. SEM...

63

Detection of dynamical transitions in hydrogenous materials using transmission measurements with very cold neutrons  

SciTech Connect

We have tested the transmission of very cold neutrons as a method to measure dynamical transitions in hydrogenous materials. Transmitted intensities vs. temperature at 30 A neutron wavelength were measured for four materials that undergo phase transformations associated with changes in dynamics: ammonium iodide, sodium borohydride, hexamethylbenzene, and dicesium dodecahydro-closo-dodecaborate. In some cases, neutron vibrational spectra above and below the transformation temperatures are compared to the transmission results. The measurements show changes in transmission at or near the transition for all these compounds, reflecting dynamical changes. The results demonstrate that the transmission method is sensitive to motional changes due to a wide range of structural transitions, from first-order to much more subtle order-disorder effects and for both small molecular species and larger molecules. The technique is valuable for rapid (ca. hours) scans of new materials to guide neutron inelastic scattering experiments or to complement the results of other techniques. - Graphical abstract: The transmission of very long wavelength neutrons is a highly sensitive probe of dynamical transitions in hydrogenous materials. Highlights: > Transmission of very long wavelength neutrons can probe dynamical transitions. > The technique is sensitive for both first-order and order-disorder transformations. > Changes in dynamical behavior of small and large molecular species can be detected. > This method can be a valuable guide for complex neutron scattering experiments.

Verdal, Nina, E-mail: nina.verdal@nist.gov [NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102 (United States); Udovic, Terrence J.; Copley, John R.D. [NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102 (United States); Rush, John J. [NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102 (United States); Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115 (United States)

2011-10-15T23:59:59.000Z

64

Transmission  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Transmission ,... ,...vc- "' ""'\ S I r;. Dr. Jerry Pell, CCM Principal NEP A Document Manager Permitting, Siting, and Analysis (OE-20) Office of Electricity Delivery and Energy Reliability U.S. Department of Energy 1 000 Independence A venue SW Washington, D.C. 20585-0001 Subject: Champlain Hudson Power Express Project Submittal of Amendment Application Dear Dr. Pell: February 28, 2012 On January 25, 2010, Transmission Developers, Inc. ("TDI") submitted on behalf of Champlain Hudson Power Express, Inc. ("CHPEI") an application to the U.S. Department of Energy ("DOE") for a Presidential Permit ("Application) in connection with the Champlain Hudson Power Express project ("Project"). The Application proposed to connect clean sources

65

EPRI Power Electronics-Based Transmission Controllers Reference Book ("The Gold Book")  

Science Conference Proceedings (OSTI)

EPRI is sponsoring development of a first edition of the EPRI Power Electronics-Based Transmission Controllers Reference Book. This report is the most recent draft of a chapter for the "Gold Book," an authoritative guide for utilities and others who install and maintain power electronics equipment to increase power transfer capability.

2009-12-23T23:59:59.000Z

66

Dynamics of volume transmission in the brain. Focus on ...  

Science Conference Proceedings (OSTI)

rior commissure, medial part; LSS lateral stripe of the striatum; VEn ventral endopiriform nucleus; VP ventral pallidum. Scale bar 200 ?m. Dynamics of volume ...

67

Transmission of Megawatt Relativistic Electron Beams Through Millimeter Apertures  

E-Print Network (OSTI)

High power, relativistic electron beams from energy recovery linacs have great potential to realize new experimental paradigms for pioneering innovation in fundamental and applied research. A major design consideration for this new generation of experimental capabilities is the understanding of the halo associated with these bright, intense beams. In this Letter, we report on measurements performed using the 100 MeV, 430 kWatt CW electron beam from the energy recovery linac at the Jefferson Laboratory's Free Electron Laser facility as it traversed a set of small apertures in a 127 mm long aluminum block. Thermal measurements of the block together with neutron measurements near the beam-target interaction point yielded a consistent understanding of the beam losses. These were determined to be 3 ppm through a 2 mm diameter aperture and were maintained during a 7 hour continuous run.

R. Alarcon; S. Balascuta; S. V. Benson; W. Bertozzi; J. R. Boyce; R. Cowan; D. Douglas; P. Evtushenko; P. Fisher; E. Ihloff; N. Kalantarians; A. Kelleher; R. Legg; R. G. Milner; G. R. Neil; L. Ou; B. Schmookler; C. Tennant; C. Tschalaer; G. P. Williams; S. Zhang

2013-05-01T23:59:59.000Z

68

Design studies for the transmission simulator method of experimental dynamic substructuring.  

SciTech Connect

In recent years, a successful method for generating experimental dynamic substructures has been developed using an instrumented fixture, the transmission simulator. The transmission simulator method solves many of the problems associated with experimental substructuring. These solutions effectively address: (1) rotation and moment estimation at connection points; (2) providing substructure Ritz vectors that adequately span the connection motion space; and (3) adequately addressing multiple and continuous attachment locations. However, the transmission simulator method may fail if the transmission simulator is poorly designed. Four areas of the design addressed here are: (1) designating response sensor locations; (2) designating force input locations; (3) physical design of the transmission simulator; and (4) modal test design. In addition to the transmission simulator design investigations, a review of the theory with an example problem is presented.

Mayes, Randall Lee; Arviso, Michael

2010-05-01T23:59:59.000Z

69

Dynamical electronic nematicity from Mott physics  

Science Conference Proceedings (OSTI)

Very large anisotropies in transport quantities have been observed in the presence of very small in-plane structural anisotropy in many strongly correlated electron materials. By studying the two-dimensional Hubbard model with dynamical-mean-field theory for clusters, we show that such large anisotropies can be induced without static stripe order if the interaction is large enough to yield a Mott transition. Anisotropy decreases at large frequency. The maximum effect on conductivity anisotropy occurs in the underdoped regime, as observed in high temperature superconductors.

Okamoto, Satoshi [ORNL; Senechal, D. [University of Sherbrooke; Civelli, M. [Institut Laue-Langevin (ILL); Tremblay, A.-M. [University of Sherbrooke

2010-01-01T23:59:59.000Z

70

Field Guide: Transmission Line Aerial Marking and Lighting (Optimized for Electronic Viewing)  

Science Conference Proceedings (OSTI)

Various types of aerial marking and lighting are applied to transmission structures and wires as a safety enhancement to improve the visibility of structures and lines. This EPRI report, one in a series of practical guides designed as reference aids for utility personnel working in the field, is devoted to the subject of transmission line aerial marking and lighting, with an emphasis on inspection.This field guide has been optimized for viewing on electronic devices. For a standard PDF ...

2011-12-09T23:59:59.000Z

71

Real-time studies of battery electrochemical reactions inside a transmission electron microscope.  

DOE Green Energy (OSTI)

We report the development of new experimental capabilities and ab initio modeling for real-time studies of Li-ion battery electrochemical reactions. We developed three capabilities for in-situ transmission electron microscopy (TEM) studies: a capability that uses a nanomanipulator inside the TEM to assemble electrochemical cells with ionic liquid or solid state electrolytes, a capability that uses on-chip assembly of battery components on to TEM-compatible multi-electrode arrays, and a capability that uses a TEM-compatible sealed electrochemical cell that we developed for performing in-situ TEM using volatile battery electrolytes. These capabilities were used to understand lithiation mechanisms in nanoscale battery materials, including SnO{sub 2}, Si, Ge, Al, ZnO, and MnO{sub 2}. The modeling approaches used ab initio molecular dynamics to understand early stages of ethylene carbonate reduction on lithiated-graphite and lithium surfaces and constrained density functional theory to understand ethylene carbonate reduction on passivated electrode surfaces.

Leung, Kevin; Hudak, Nicholas S.; Liu, Yang; Liu, Xiaohua H.; Fan, Hongyou; Subramanian, Arunkumar; Shaw, Michael J.; Sullivan, John Patrick; Huang, Jian Yu

2012-01-01T23:59:59.000Z

72

Unfolding linac photon spectra and incident electron energies from experimental transmission data, with direct independent validation  

SciTech Connect

Purpose: In a recent computational study, an improved physics-based approach was proposed for unfolding linac photon spectra and incident electron energies from transmission data. In this approach, energy differentiation is improved by simultaneously using transmission data for multiple attenuators and detectors, and the unfolding robustness is improved by using a four-parameter functional form to describe the photon spectrum. The purpose of the current study is to validate this approach experimentally, and to demonstrate its application on a typical clinical linac. Methods: The validation makes use of the recent transmission measurements performed on the Vickers research linac of National Research Council Canada. For this linac, the photon spectra were previously measured using a NaI detector, and the incident electron parameters are independently known. The transmission data are for eight beams in the range 10-30 MV using thick Be, Al and Pb bremsstrahlung targets. To demonstrate the approach on a typical clinical linac, new measurements are performed on an Elekta Precise linac for 6, 10 and 25 MV beams. The different experimental setups are modeled using EGSnrc, with the newly added photonuclear attenuation included. Results: For the validation on the research linac, the 95% confidence bounds of the unfolded spectra fall within the noise of the NaI data. The unfolded spectra agree with the EGSnrc spectra (calculated using independently known electron parameters) with RMS energy fluence deviations of 4.5%. The accuracy of unfolding the incident electron energy is shown to be {approx}3%. A transmission cutoff of only 10% is suitable for accurate unfolding, provided that the other components of the proposed approach are implemented. For the demonstration on a clinical linac, the unfolded incident electron energies and their 68% confidence bounds for the 6, 10 and 25 MV beams are 6.1 {+-} 0.1, 9.3 {+-} 0.1, and 19.3 {+-} 0.2 MeV, respectively. The unfolded spectra for the clinical linac agree with the EGSnrc spectra (calculated using the unfolded electron energies) with RMS energy fluence deviations of 3.7%. The corresponding measured and EGSnrc-calculated transmission data agree within 1.5%, where the typical transmission measurement uncertainty on the clinical linac is 0.4% (not including the uncertainties on the incident electron parameters). Conclusions: The approach proposed in an earlier study for unfolding photon spectra and incident electron energies from transmission data is accurate and practical for clinical use.

Ali, E. S. M.; McEwen, M. R.; Rogers, D. W. O. [Carleton Laboratory for Radiotherapy Physics, Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada); Ionizing Radiation Standards, Institute for National Measurement Standards, National Research Council, M-35 Montreal Road, Ottawa, Ontario K1A 0R5 (Canada); Carleton Laboratory for Radiotherapy Physics, Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada)

2012-11-15T23:59:59.000Z

73

EPRI Power Electronics-Based Transmission Controllers Reference Book ("The Gold Book")  

Science Conference Proceedings (OSTI)

EPRI is sponsoring development of a first edition of the EPRI Power Electronics-Based Transmission Controllers Reference Book. The reference book will provide a broad overview on power electronics-based controllers0150with information on historical perspectives, basic design considerations, factory testing, site installations, commissioning, operating performance, operation and maintenance, and future trends. The book will assist users in planning, developing, installing, and utilizing this technology.

2006-12-05T23:59:59.000Z

74

Method and apparatus for a high-resolution three dimensional confocal scanning transmission electron microscope  

DOE Patents (OSTI)

A confocal scanning transmission electron microscope which includes an electron illumination device providing an incident electron beam propagating in a direction defining a propagation axis, and a precision specimen scanning stage positioned along the propagation axis and movable in at least one direction transverse to the propagation axis. The precision specimen scanning stage is configured for positioning a specimen relative to the incident electron beam. A projector lens receives a transmitted electron beam transmitted through at least part of the specimen and focuses this transmitted beam onto an image plane, where the transmitted beam results from the specimen being illuminated by the incident electron beam. A detection system is placed approximately in the image plane.

de Jonge, Niels (Oak Ridge, TN)

2010-08-17T23:59:59.000Z

75

Centralized Wireless MAC Protocols Using Slotted ALOHA and Dynamic TDD Transmission  

E-Print Network (OSTI)

ALOHA scheme with dynamic Time Division Duplexed (TDD) transmission is designed and analyzed. A centralized (i.e., star) network is adopted as the topology of a cell which consists of a base station and a number of mobile clients. In dynamic TDD transmission mode, a channel is time-shared for downlink and uplink transmissions under the dynamic access control of the base station. We first propose two MAC protocols (called TDD1 and TDD2 ) depending on how downlink and uplink transmissions are multiplexed. We then analyze throughput and average delay of TDD1 and an alternative ALOHA scheme using Frequency Division Duplexed (FDD) transmission. Finally, we evaluate the performance of these schemes, and compare TDD1 (calculations), TDD2 (simulations), and FDD (calculations). TDD schemes are found to always work as good as, or better than, FDD. TDD2 is observed to outperform TDD1 with respect to the downlink delay in the presence of light uplink and heavy downlink traffic loads while they wor...

Sunghyun Choi; Kang G. Shin

1996-01-01T23:59:59.000Z

76

Dynamic and short-circuit power of CMOS gates driving lossless transmission lines  

E-Print Network (OSTI)

Abstract—The dynamic and short-circuit power consumption of a complementary metal–oxide–semidconductor (CMOS) gate driving an inductance–capacitance (LC) transmission line as a limiting case of an RLC transmission line is investigated in this paper. Closed-form solutions for the output voltage and shortcircuit power of a CMOS gate driving an LC transmission line are presented. A closed form solution for the short-circuit power is also presented. These solutions agree with circuit simulations within 11 % error for a wide range of transistor widths and line impedances for a 0.25-"m CMOS technology. The ratio of the short circuit to dynamic power is shown to be less than 7 % for CMOS gates driving LC transmission lines where the line is matched or underdriven. The total power consumption is expected to decrease as inductance effects becomes more significant as compared to a resistance–capacitance (RC)-dominated interconnect line. Index Terms—CMOS, dynamic, interconnect, LC, power dissipation, RC, RLC, short-circuit, transmission lines.

Yehea I. Ismail; Eby G. Friedman; Senior Member; Jose Luis Neves

1999-01-01T23:59:59.000Z

77

Numerical study of electron-leakage power loss in a tri-plate transmission line  

SciTech Connect

Numerical simulations have been conducted using NRL's DIODE2D computer code to model the steady-state behavior of electron flow in a radial diode and in its adjacent tri-plate transmission line (TTL). Particular attention was paid to the magnitude of the electron current flowing from the cathode to the anode surface in the TTL. A quantitative value for this effective power loss is given. The electron current is restricted mainly to the transition region in the TTL into which there is seepage of the B/sub z/ that is imposed in the diode gap. This finding highlights the importance of that region to diode designers.

Barker, R.J.; Goldstein, S.A.

1982-06-23T23:59:59.000Z

78

Dynamics of electrical transmission at club endings on the Mauthner cells Alberto E. Peredaa,*, John E. Rashb  

E-Print Network (OSTI)

Review Dynamics of electrical transmission at club endings on the Mauthner cells Alberto E. Peredaa, the club endings, have historically provided a window for the study of electrical transmission data show that electrical transmission at these terminals is mediated by connexin35 (Cx35), the fish

Rash, John E.

79

Nanoscale Energy-Filtered Scanning Confocal Electron Microscopy Using a Double-Aberration-Corrected Transmission Electron Microscope  

SciTech Connect

We demonstrate that a transmission electron microscope fitted with two spherical-aberration correctors can be operated as an energy-filtered scanning confocal electron microscope. A method for establishing this mode is described and initial results showing 3D chemical mapping with nanoscale sensitivity to height and thickness changes in a carbon film are presented. Importantly, uncorrected chromatic aberration does not limit the depth resolution of this technique and moreover performs an energy-filtering role, which is explained in terms of a combined depth and energy-loss response function.

Wang Peng; Behan, Gavin; Kirkland, Angus I.; Nellist, Peter D. [Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Takeguchi, Masaki; Hashimoto, Ayako; Mitsuishi, Kazutaka [National Institute for Materials Science, 3-13 Sakura, Tsukuba, 305-0003 (Japan); Shimojo, Masayuki [Advanced Science Research Laboratory, Saitama Institute of Technology, 1690 Fusaiji, Fukaya 369-0293 (Japan)

2010-05-21T23:59:59.000Z

80

In situ transmission electron microscopy observation of silver oxidation in ionized/atomic gas.  

Science Conference Proceedings (OSTI)

The interaction between silver and ionized and atomic gas was observed directly by in situ transmission electron microscopy with an environmental cell for the first time. The electron beam provides dual functions as the source of both gas ionization and imaging. The concentration of ionized gas was tuned via adjusting the current density of the electron beam. Oxidation of the silver is observed in situ, indicating the presence of ionized and/or atomic oxygen. The evolution of microstructure and phase constituents was characterized. Then the oxidation rate was measured, and the relationships among grain size, mass transport rate, and electron flux were characterized. The role of the electron beam is discussed, and the results are rationalized with respect to ex situ results from the literature.

Sun, L.; Noh, K. W.; Wen, J-G.; Dillon, S. J. (Materials Science Division); (Massachusetts Inst. Tech.); (Univ. Illinois - Urbana)

2011-10-17T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Correction for dynamic bias error in transmission measurements of void fraction  

SciTech Connect

Dynamic bias errors occur in transmission measurements, such as X-ray, gamma, or neutron radiography or tomography. This is observed when the properties of the object are not stationary in time and its average properties are assessed. The nonlinear measurement response to changes in transmission within the time scale of the measurement implies a bias, which can be difficult to correct for. A typical example is the tomographic or radiographic mapping of void content in dynamic two-phase flow systems. In this work, the dynamic bias error is described and a method to make a first-order correction is derived. A prerequisite for this method is variance estimates of the system dynamics, which can be obtained using high-speed, time-resolved data acquisition. However, in the absence of such acquisition, a priori knowledge might be used to substitute the time resolved data. Using synthetic data, a void fraction measurement case study has been simulated to demonstrate the performance of the suggested method. The transmission length of the radiation in the object under study and the type of fluctuation of the void fraction have been varied. Significant decreases in the dynamic bias error were achieved to the expense of marginal decreases in precision.

Andersson, P.; Sunden, E. Andersson; Svaerd, S. Jacobsson; Sjoestrand, H. [Department of Physics and Astronomy, Division of Applied Nuclear Physics, Uppsala University, Laegerhyddsgatan 1, 751 20 Uppsala (Sweden)

2012-12-15T23:59:59.000Z

82

In-situ Transmission Electron Microscopy and Spectroscopy Studies of Interfaces in Li-ion Batteries: Challenges and Opportunities  

SciTech Connect

The critical challenge facing the lithium ion battery development is the basic understanding of the structural evolution during the cyclic operation of the battery and the consequence of the structural evolution on the properties of the battery. Although transmission electron microscopy (TEM) and spectroscopy have been evolved to a stage such that it can be routinely used to probe into both the structural and chemical composition of the materials with a spatial resolution of a single atomic column, a direct in-situ TEM observation of structural evolution of the materials in lithium ion battery during the dynamic operation of the battery has never been reported. This is related to three factors: high vacuum operation of a TEM; electron transparency requirement of the region to be observed, and the difficulties dealing with the liquid electrolyte of lithium ion battery. In this paper, we report the results of exploring the in-situ TEM techniques for observation of the interface in lithium ion battery during the operation of the battery. A miniature battery was fabricated using a nanowire and an ionic liquid electrolyte. The structure and chemical composition of the interface across the anode and the electrolyte was studied using TEM imaging, electron diffraction, and electron energy loss spectroscopy. In addition, we also explored the possibilities of carrying out in-situ TEM studies of lithium ion batteries with a solid state electrolyte.

Wang, Chong M.; Xu, Wu; Liu, Jun; Choi, Daiwon; Arey, Bruce W.; Saraf, Laxmikant V.; Zhang, Jiguang; Yang, Zhenguo; Thevuthasan, Suntharampillai; Baer, Donald R.; Salmon, Norman

2010-08-01T23:59:59.000Z

83

Field Guide: Inspection of Transmission Line Grounding Systems (Optimized for Electronic Viewing)  

Science Conference Proceedings (OSTI)

This EPRI report, one in a series of practical guides designed as reference aids for utility personnel working in the field, visually catalogs the various condition issues that commonly affect transmission line grounding systems. It presents photographs and short written descriptions of the conditions and lists associated causes, failure modes, and impacts. This field guide has been optimized for viewing on electronic devices. For a standard PDF or copy of this product printed on high-quality paper ...

2011-12-09T23:59:59.000Z

84

Complex Crystallization Dynamics in Amorphous Germanium ...  

Science Conference Proceedings (OSTI)

We used dynamic transmission electron microscopy [2] to study in situ this fast dynamics ... of Magnetism in Multiferroic Heterostructures and Low-power Devices ...

85

ELECTRON COUD DYNAMICS IN HIGH-INTENSITY RINGS.  

SciTech Connect

Electron cloud due to beam-induced multipacting is one of the main concerns for the high intensity. Electrons generated and accumulated inside the beam pipe form an ''electron cloud'' that interacts with the circulating charged particle beam. With sizeable amount of electrons, this interaction can cause beam instability, beam loss and emittance growth. At the same time, the vacuum pressure will rise due to electron desorption. This talk intends to provide an overview of the mechanism and dynamics of the typical electron multipacting in various magnetic fields and mitigation measures with different beams.

WANG, L.; WEI, J.

2005-05-16T23:59:59.000Z

86

Hot electron transmission in metals using epitaxial NiSi{sub 2}/n-Si(111) interfaces  

SciTech Connect

We have investigated hot electron transmission across epitaxial metal-disilicide/n-Si(111) interfaces using ballistic electron emission microscopy (BEEM). Different crystal orientations of epitaxial NiSi{sub 2} were grown on a Si(111) substrate using molecular beam epitaxy. The presence of different interfaces of NiSi{sub 2} on Si(111) were confirmed by high resolution transmission electron microscopy. Electrical transport measurements reveal a clear rectifying Schottky interface with a barrier height of 0.69 eV. However, using BEEM, three different regions with different transmissions and Schottky barrier heights of 0.65 eV, 0.78 eV, and 0.71 eV are found. The addition of a thin Ni film on the NiSi{sub 2} layer strongly reduces the transmission in all the three regions and interestingly, almost equalizes the transmission across them.

Parui, S.; Wit, B.; Wees, B. J. van; Banerjee, T. [Physics of Nanodevices, Zernike Institute for Advanced Materials, University of Groningen (Netherlands); Bignardi, L.; Rudolf, P. [Surfaces and Thin Films, Zernike Institute for Advanced Materials, University of Groningen (Netherlands); Kooi, B. [Nanostructured Materials and Interfaces, Zernike Institute for Advanced Materials, University of Groningen (Netherlands)

2011-07-18T23:59:59.000Z

87

Dynamic Electron Control using Light and Nanostructure.  

E-Print Network (OSTI)

??The advent of nano-technology has made possible the manipulation of electron or light through nanostructures. For example, a nano-tip in near-field optical microscopy allows imaging… (more)

Huang, Cheng-Wei

2013-01-01T23:59:59.000Z

88

Studying The Kinetics Of Crystalline Silicon Nanoparticle Lithiation With In-Situ Transmission Electron Microscopy  

Science Conference Proceedings (OSTI)

Silicon is an attractive high-capacity anode material for Li-ion batteries, but a comprehensive understanding of the massive ~300% volume change and fracture during lithiation/delithiation is necessary to reliably employ Si anodes. Here, in-situ transmission electron microscopy (TEM) of the lithiation of crystalline Si nanoparticles reveals that the reaction slows down as it progresses into the particle interior. Analysis suggests that this behavior is due to the influence of mechanical stress at the reaction front on the driving force for the reaction. These experiments give insight into the factors controlling the kinetics of this unique reaction.

Mcdowell, Matthew T.; Ryu, Ill; Lee, Seokwoo; Wang, Chong M.; Nix, William D.; Cui, Yi

2012-11-27T23:59:59.000Z

89

Transmission Line Inspires A New Distributed Algorithm to Solve the Nonlinear Dynamical System of Physical Circuit  

E-Print Network (OSTI)

As known, physical circuits, e.g. integrated circuits or power system, work in a distributed manner, but these circuits could not be easily simulated in a distributed way. This is mainly because that the dynamical system of physical circuits is nonlinear and the linearized system of physical circuits is non-symmetrical. This paper proposes a simple and natural strategy to simulate the physical circuit in parallel, by mimicking the internal wires or interconnects inside the circuits by distributed numerical algorithm. Mimic Transmission Method (MTM) is a new distributed numerical algorithm to solve the nonlinear ordinary differential equations extracted from physical circuits. It maps the transmission delay of interconnects between subcircuits to the communication delay of digital data link between processors. MTM is not a global iterative algorithm, and it does only one distributed computation at each time window to obtain accurate result, so unconvergence issues do not need to be worried about.

Wei, Fei

2010-01-01T23:59:59.000Z

90

Atomic Imaging Using Secondary Electrons in a Scanning Transmission Electron Microscope: Experimental Observations and Possible Mechanisms  

SciTech Connect

We report detailed investigation of high-resolution imaging using secondaryelectrons (SE) with a sub-nanometer probe in an aberration-corrected transmissionelectron microscope, Hitachi HD2700C. This instrument also allows us to acquire the corresponding annular dark-field (ADF) images both simultaneously and separately. We demonstrate that atomic SE imaging is achievable for a wide range of elements, from uranium to carbon. Using the ADF images as a reference, we studied the SE image intensity and contrast as functions of applied bias, atomic number, crystal tilt, and thickness to shed light on the origin of the unexpected ultrahigh resolution in SE imaging. We have also demonstrated that the SE signal is sensitive to the terminating species at a crystal surface. Apossiblemechanism for atomic-scale SE imaging is proposed. The ability to image both the surface and bulk of a sample at atomic-scale is unprecedented, and can have important applications in the field of electron microscopy and materials characterization.

Su, D.; Inada, H.; Egerton, R.F.; Konno, M.; Wua, L.; Ciston, J.; Wall, J.; Zhu, Y.

2011-11-11T23:59:59.000Z

91

Transmission electron microscopy characterization of electrically stressed AlGaN/GaN high electron mobility transistor devices  

Science Conference Proceedings (OSTI)

A set of AlGaN/GaN high electron mobility transistor devices has been investigated using step-stress testing, and representative samples of undegraded, source-side-degraded, and drain-side-degraded devices were examined using electron microscopy and microanalysis. An unstressed reference sample was also examined. All tested devices and their corresponding transmission electron microscopy samples originated from the same wafer and thus received nominally identical processing. Step-stressing was performed on each device and the corresponding current voltage characteristics were generated. Degradation in electrical performance, specifically greatly increased gate leakage current, was shown to be correlated with the presence of crystal defects near the gate edges. However, the drain-side-degraded device showed a surface pit on the source side, and another region of the same device showed no evidence of damage. Moreover, significant metal diffusion into the barrier layer from the gate contacts was also observed, as well as thin amorphous oxide layers below the gate metal contacts, even in the unstressed sample. Overall, these observations emphasize that gate-edge defects provide only a partial explanation for device failure.

Johnson, Michael [Arizona State University; Cullen, David A [ORNL; Liu, Lu [University of Florida; Kang, Tsung Sheng [University of Florida, Gainesville; Ren, F. [University of Florida; Chang, C. Y. [University of Florida; Pearton, S. J. [University of Florida; Jang, Soohwan [University of Florida, Gainesville; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Smith, David J [Arizona State University

2012-01-01T23:59:59.000Z

92

Ultrafast dynamics of electrons at interfaces  

Science Conference Proceedings (OSTI)

Electronic states of a thin layer of material on a surface possess unique physical and chemical properties. Some of these properties arise from the reduced dimensionality of the thin layer with respect to the bulk or the properties of the electric field where two materials of differing dielectric constants meet at an interface. Other properties are related to the nature of the surface chemical bond. Here, the properties of excess electrons in thin layers of Xenon, Krypton, and alkali metals are investigated, and the bound state energies and effective masses of the excess electrons are determined using two-photon photoemission. For Xenon, the dependence of bound state energy, effective mass, and lifetime on layer thickness from one to nine layers is examined. Not all quantities were measured at each coverage. The two photon photoemission spectra of thin layers of Xenon on a Ag(111) substrate exhibit a number of sharp, well-defined peaks. The binding energy of the excess electronic states of Xenon layers exhibited a pronounced dependence on coverage. A discrete energy shift was observed for each additional atomic layer. At low coverage, a series of states resembling a Rydberg series is observed. This series is similar to the image state series observed on clean metal surfaces. Deviations from image state energies can be described in terms of the dielectric constant of the overlayer material and its effect on the image potential. For thicker layers of Xe (beyond the first few atomic layers), the coverage dependence of the features begins to resemble that of quantum well states. Quantum well states are related to bulk band states. However, the finite thickness of the layer restricts the perpendicular wavevector to a discrete set of values. Therefore, the spectrum of quantum well states contains a series of peaks which correspond to the various allowed values of the perpendicular wavevector. Analysis of the quantum well spectrum yields electronic band structure information. In this case, the quantum well states examined are derived from the Xenon conduction band. Measurements of the energies as a function of coverage yield the dispersion along the axis perpendicular to the surface while angle-resolved two-photon photoemission measurements yield information about dispersion along the surface parallel. The relative importance of the image potential and the overlayer band structure also depends on the quantum number and energy of the state. Some members of the image series may have an energy which is in an energy gap of the layer material, therefore such states may tend to remain physically outside the layer and retain much of their image character even at higher coverages. This is the case for the n = 1 image state of the Xe/Ag(111) system. The energies of image states which are excluded from the layer have a complex dependence on the thickness of the layer and its dielectric constant. The population decay kinetics of excited electronic states of the layer were also determined. Lifetimes are reported for the first three excited states for 1-6 atomic layers of Xe on Ag(111). As the image states evolve into quantum well states with increasing coverage, the lifetimes undergo an oscillation which marks a change in the spatial extent of the state. For example, the n = 2 quantum well state decreases substantially at 3-5 layers as the electron probability density in the layer increases. The lifetime data are modeled by extending the two-band nearly-free-electron approximation to account for the insulating Xe layer.

McNeill, Jason D.

1999-05-03T23:59:59.000Z

93

Power electronics: A field rich in nonlinear dynamics  

E-Print Network (OSTI)

This review paper starts by setting out the aims and applications of power electronics, and continues with a brief history and a list of the important power semiconductor devices. The related areas of ac machines and power systems are also briefly visited. The development of nonlinear dynamics in electronic circuits is reviewed. Then a typical power converter, a controlled buck dc-dc converter, is modelled by the conventional method of averaging and linearisation (which predicts stability), and by a nonlinear map based method, which reveals bifurcations, subharmonics and chaos. The numerical problems caused by the discontinuities in the state equations of power electronics are discussed. Finally, some possible future applications are considered. 1 Introduction to Power Electronics M ost branches of electronics are concerned with processing information or signals; in contrast, power electronics deals with the processing of electrical energy. Power converters do not have an end of

David C. Hamill

1995-01-01T23:59:59.000Z

94

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

SciTech Connect

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

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

2013-11-01T23:59:59.000Z

95

Electronically controllable transmission line design for traveling wave array antenna feed network  

E-Print Network (OSTI)

In this thesis, an electronically controllable transmission line (ECTL) is presented. By modulating the conductivity of a doped Si modulator in the ECTL, the wave propagation constant in the ECTL is controlled. Measured results show a phase change in the ECTL at a single frequency when non-zero bias voltage is applied. This ECTL is implemented in order to feed a traveling wave array antenna, which is composed of 8 aperture-coupled microstrip antenna elements. It is demonstrated that phase change in an ECTL feed line has applications as a traveling wave array antenna with beam steering. S-parameter measurements are presented which demonstrate phase change in an ECTL and main beam steering of an 8-element traveling wave array antenna. The design procedure for an aperture-coupled microstrip antenna with a specific input impedance at the resonant frequency and a matching circuit design for a traveling wave array antenna are discussed in detail.

Shin, Chang-Seok

2002-01-01T23:59:59.000Z

96

Sub-0.1 nm-resolution quantitative scanning transmission electron microscopy without adjustable parameters  

Science Conference Proceedings (OSTI)

Atomic-resolution imaging in the scanning transmission electron microscope (STEM) constitutes a powerful tool for nanostructure characterization. Here, we demonstrate the quantitative interpretation of atomic-resolution high-angle annular dark-field (ADF) STEM images using an approach that does not rely on adjustable parameters. We measure independently the instrumental parameters that affect sub-0.1 nm-resolution ADF images, quantify their individual and collective contributions to the image intensity, and show that knowledge of these parameters enables a quantitative interpretation of the absolute intensity and contrast across all accessible spatial frequencies. The analysis also provides a method for the in-situ measurement of the STEM's effective source distribution.

Dwyer, C. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Department of Materials Engineering, Monash University, Victoria 3800 (Australia); ARC Centre of Excellence for Design in Light Metals, Monash University, Victoria 3800 (Australia); Maunders, C. [Department of Materials Engineering, Monash University, Victoria 3800 (Australia); Zheng, C. L. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Weyland, M.; Etheridge, J. [Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia); Department of Materials Engineering, Monash University, Victoria 3800 (Australia); Tiemeijer, P. C. [FEI Electron Optics, P.O. Box 80066, 5600 KA Eindhoven (Netherlands)

2012-05-07T23:59:59.000Z

97

Characterization of polysilicon films by Raman spectroscopy and transmission electron microscopy: A comparative study  

SciTech Connect

Samples of chemically-vapor-deposited micrometer and sub-micrometer-thick films of polysilicon were analyzed by transmission electron microscopy (TEM) in cross-section and by Raman spectroscopy with illumination at their surface. TEM and Raman spectroscopy both find varying amounts of polycrystalline and amorphous silicon in the wafers. Raman spectra obtained using blue, green and red excitation wavelengths to vary the Raman sampling depth are compared with TEM cross-sections of these films. Films showing crystalline columnar structures in their TEM micrographs have Raman spectra with a band near 497 cm{sup {minus}1} in addition to the dominant polycrystalline silicon band (521 cm{sup {minus}1}). The TEM micrographs of these films have numerous faulted regions and fringes indicative of nanometer-scale silicon structures, which are believed to correspond to the 497cm{sup {minus}1} Raman band.

Tallant, D.R.; Headley, T.J.; Medernach, J.W. [Sandia National Labs., Albuquerque, NM (United States); Geyling, F. [SEMATECH, Austin, TX (United States)

1993-11-12T23:59:59.000Z

98

A correlated-polaron electronic propagator: open electronic dynamics beyond the Born-Oppenheimer approximation  

E-Print Network (OSTI)

In this work we develop a theory of correlated many-electron dynamics dressed by the presence of a finite-temperature harmonic bath. The theory is based on the ab-initio Hamiltonian, and thus well-defined apart from any phenomenological choice of collective basis states or electronic coupling model. The equation-of-motion includes some bath effects non-perturbatively, and can be used to simulate line- shapes beyond the Markovian approximation and open electronic dynamics which are subjects of renewed recent interest. Energy conversion and transport depend critically on the ratio of electron-electron coupling to bath-electron coupling, which is a fitted parameter if a phenomenological basis of many-electron states is used to develop an electronic equation of motion. Since the present work doesn't appeal to any such basis, it avoids this ambiguity. The new theory produces a level of detail beyond the adiabatic Born-Oppenheimer states, but with cost scaling like the Born-Oppenheimer approach. While developing this model we have also applied the time-convolutionless perturbation theory to correlated molecular excitations for the first time. Resonant response properties are given by the formalism without phenomenological parameters. Example propagations with a developmental code are given demonstrating the treatment of electron-correlation in absorption spectra, vibronic structure, and decay in an open system.

John A. Parkhill; Thomas Markovich; David G. Tempel; Alan Aspuru-Guzik

2012-06-12T23:59:59.000Z

99

Electron as a Complex-Dynamical Interaction Process  

E-Print Network (OSTI)

A system of two initially homogeneous, physically real fields uniformly attracted to each other is considered as the simplest basis of the self-developing world structure. It is shown that the system is unstable against periodic cycles of self-amplified, essentially nonlinear squeeze of its extended part to a small volume around randomly chosen centre, followed by the reverse extension. The resulting spatially random pulsation, or "quantum beat", is observed as (massive) elementary particle such as the electron. The property of mass is then universally and consistently defined as temporal rate of such dynamically chaotic and essentially nonlinear quantum beat, without introduction of any additional entities. The obtained picture can be considered as complex-dynamical completion of the "double solution" concept of Louis de Broglie. The dynamically emerging wave-particle duality, quantum discreteness, indeterminacy, space, and time lead to the equations of special relativity and quantum mechanics, providing their causal explanation and explicit unification. The elementary particle structure, its intrinsic properties, quantum and relativistic behaviour are obtained thus all together, within the unified analysis of the unreduced interaction process leading to the universal concept of dynamic complexity. The same complex-dynamical process accounts for the universal gravitation and general relativity. The electromagnetic, weak, and strong types of interaction between particles also constitute integral, dynamically unified parts of quantum beat processes inside elementary particles. The classical, dynamically localised behaviour emerges in a closed system as a higher complexity level corresponding to formation of elementary bound systems (like atoms).

Andrei P. Kirilyuk

2004-10-28T23:59:59.000Z

100

The Engineering Analysis in Support of the ITER Electron Cyclotron Heating and Current Drive Transmission Lines  

Science Conference Proceedings (OSTI)

Technical Paper / Sixteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-16)

D. M. S. Ronden; M. A. Henderson; B. Becket; T. Bigelow; J. Caughman; C. Darbos; F. Gandini; C. Nazare; D. Rasmussen; V. Udintsev

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

A correlated-polaron electronic propagator: open electronic dynamics beyond the Born-Oppenheimer approximation  

E-Print Network (OSTI)

In this work we develop a theory of correlated many-electron dynamics dressed by the presence of a finite-temperature harmonic bath. The theory is based on the ab-initio Hamiltonian, and thus well-defined apart from any phenomenological choice of collective basis states or electronic coupling model. The equation-of-motion includes some bath effects non-perturbatively, and can be used to simulate line- shapes beyond the Markovian approximation and open electronic dynamics which are subjects of renewed recent interest. Energy conversion and transport depend critically on the ratio of electron-electron coupling to bath-electron coupling, which is a fitted parameter if a phenomenological basis of many-electron states is used to develop an electronic equation of motion. Since the present work doesn't appeal to any such basis, it avoids this ambiguity. The new theory produces a level of detail beyond the adiabatic Born-Oppenheimer states, but with cost scaling like the Born-Oppenheimer approach. While developing th...

Parkhill, John A; Tempel, David G; Aspuru-Guzik, Alan

2012-01-01T23:59:59.000Z

102

Isolated sub-100-attosecond pulse generation via controlling electron dynamics  

E-Print Network (OSTI)

A new method to coherently control the electron dynamics is proposed using a few-cycle laser pulse in combination with a controlling field. It is shown that this method not only broadens the attosecond pulse bandwidth, but also reduces the chirp, then an isolated 80-as pulse is straightforwardly obtained and even shorter pulse is achievable by increasing the intensity of the controlling field. Such ultrashort pulses allow one to investigate ultrafast electronic processes which have never be achieved before. In addition, the few-cycle synthesized pulse is expected to manipulate a wide range of laser-atom interactions.

Lan, Pengfei; Cao, Wei; Li, Yuhua; Wang, Xinlin

2007-01-01T23:59:59.000Z

103

High resolution transmission electron microscopy of melamine-formaldehyde aerogels and silica aerogels  

Science Conference Proceedings (OSTI)

The goal of the high resolution transmission electron microscopy (HRTEM) was to image the structure of two tetramethyl orthosilicate (TMOS) and two melamine-formaldehyde (MF) aerogels at the single polymer chain level{sup 1,2}. With this level of structural resolution we hoped to interrelate each aerogel's structure with its physical properties and its method of synthesis. Conventional single-step base catalysed TMOS aerogels show strings of spheroidal particles linked together with minimal necking. The spheroidal particles range from 86--132 {Angstrom} and average 113{plus minus}10 {Angstrom} in diameter{sup 2}. In contrast the TMOS aerogels reported on here were made by a two step method. After extended silica chains are grown in solution under acidic conditions with a substoichiometric amount of water, the reaction is stopped and the methanol hydrolysed from TMOS is removed. Then base catalysis and additional water are added to cause gel formation is a nonalcoholic solvent. The MF aerogels were prepared for HRTEM by fracturing them on a stereo microscope stage with razor knife so that fractured pieces with smooth flat surfaces could be selected for platinum-carbon replication. The two silica (TMOS) aerogels were both transparent and difficult to see. These aerogels were fractured on a stereo microscope stage with tweezers. 6 refs., 4 figs.

Ruben, G.C. (Dartmouth Coll., Hanover, NH (United States). Dept. of Biological Sciences)

1991-09-01T23:59:59.000Z

104

In situ transmission electron microscopy study of electric-field-induced microcracking in single crystal Pb,,Mg13Nb23...O3 PbTiO3  

E-Print Network (OSTI)

In situ transmission electron microscopy study of electric-field-induced microcracking in single March 2000; accepted for publication 2 May 2000 In this letter, we report in situ transmission electron microscopy TEM study of effect of a cyclic electric field on microcracking in a single crystal piezoelectric

Chen, Haydn H.

105

EMSL: Science: Biological Interactions and Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Biological Interactions and Dynamics Cryo-transmission electron microscope image of Shewanella oneidensis MR-1. Understanding and optimizing the response of organisms and...

106

Dynamics of an electron in an rf gap  

Science Conference Proceedings (OSTI)

The purpose of this calculation is to understand the limitation on the energy transfer efficiency of an electron beam to the rf output cavity of a klystron or a lasertron. An output cavity with drift tubes is modeled in this calculation by a region of constant amplitude rf field with exponentially decreasing entrance and exit fringing fields. The exit velocity of an electron traversing such a gap is examined as a function of entrance phase for various values of the ratio of the peak rf cavity voltage to electron entrance voltage. Depending on this ratio, the dynamics of the electron motion can become quite complex. For a gap with fringe fields it is found that, even if the gap voltage and phase are optimized, the maximum energy that can be extracted from a short bunch is always significantly less than 100%. The case in which the electron is created with zero velocity in the gap, and subsequently leaves the gap having extracted energy from the rf field, is also treated. 4 refs., 10 figs.

Farkas, Z.D.; Wilson, P.B.

1989-03-01T23:59:59.000Z

107

Thermodynamic Prediction of Compositional Phases Confirmed by Transmission Electron Microscopy on Tantalum-Based Alloy Weldments  

SciTech Connect

Tantalum alloys have been used by the U.S. Department of Energy as structural alloys for radioisotope based thermal to electrical power systems since the 1960s. Tantalum alloys are attractive for high temperature structural applications due to their high melting point, excellent formability, good thermal conductivity, good ductility (even at low temperatures), corrosion resistance, and weldability. Tantalum alloys have demonstrated sufficient high-temperature toughness to survive prolonged exposure to the radioisotope power-system working environment. Typically, the fabrication of power systems requires the welding of various components including the structural members made of tantalum alloys. Issues such as thermodynamics, lattice structure, weld pool dynamics, material purity and contamination, and welding atmosphere purity all potentially confound the understanding of the differences between the weldment properties of the different tantalum-based alloys. The objective of this paper is to outline the thermodynamically favorable material phases in tantalum alloys, with and without small amounts of hafnium, during and following solidification, based on the results derived from the FactSage(c) Integrated Thermodynamic Databank. In addition, Transition Electron Microscopy (TEM) data will show for the first time, the changes occurring in the HfC before and after welding, and the data will elucidate the role HfC plays in pinning grain boundaries.

Moddeman, William E.; Birkbeck, Janine C. [BWXT Pantex, Amarillo, Texas 79120-0020 (United States); Barklay, Chadwick D.; Kramer, Daniel P. [University of Dayton Research Institute, Dayton OH 45469-0102 (United States); Miller, Roger G.; Allard, Lawrence F. [Oak Ridge National Laboratory, Oak Ridge, TN 37831-6064 (United States)

2007-01-30T23:59:59.000Z

108

Analysis of electron dynamics in non-ideal Penning traps  

Science Conference Proceedings (OSTI)

Penning traps that are used for particular applications, such as in ion pump technology, Larmor, bouncing, and diocotron frequencies, can be of the same order of magnitude. The paper deals with the dynamics of electrons confined in such devices starting from the study of the properties of the trajectories. In cases of interest, in which electron-neutral collision frequency is much smaller with respect to the characteristic frequencies of the motion, suitable time averages of the trajectories are introduced in order to simplify the analysis of the problem. In the work, time averages have been calculated in a simple way by using an approximate r-z decoupling of the effective potential. Results obtained with the method are presented and discussed in both linear and nonlinear regimes.

Coppa, G.; Mulas, R. [Dipartimento Energia, Politecnico di Torino, 10129 Torino (Italy); D'Angola, A. [Dipartimento di Ingegneria e Fisica dell'Ambiente, Universita della Basilicata, 85100 Potenza (Italy)

2012-06-15T23:59:59.000Z

109

A direct electron bombarded charge coupled device for dynamic plasma imaging applications (abstract)  

Science Conference Proceedings (OSTI)

A variety of plasma physics experiments require the recording of continuous time history of x-ray emission. Many laboratories have developed x-ray streak camera technology in order to time resolve x-ray spectra or images produced by laser-driven plasma experiments. These cameras record x rays by converting photons to electrons, which in turn are focused and swept across an electron sensitive area detector as a function of time. X-ray photons impinging on a transmission type photocathode generate photoelectrons which are accelerated to energies between 10 and 20 keV and focused onto a phosphor screen. The light from the phosphor image may be intensified using a microchannel plate, and is usually optically coupled directly onto film or an optical charge coupled device. We have designed and built an x-ray sensitive streak camera readout where we replaced the microchannel plate based intensifier and film package with a modified charge coupled device area detector to directly absorb accelerated photoelectrons emitted from the cathode. This system has been integrated into the streak tube arrangement. We will present a set of system performance data, which have been obtained from both bench top experiments on a dc source and dynamic measurements at the Nova laser facility. X-ray images at various exposure times show better spatial resolution, improved signal to noise ratio, and higher dynamic range. Other advantages include instantaneous data readout, which enables fast postprocessing, and no increase in overall cost for an engineered system.

Weber, F.; Celliers, P.; Bell, P.; Diamond, C.

2001-01-01T23:59:59.000Z

110

Ion and electron beam nanofabrication of the which-way double-slit experiment in a transmission electron microscope  

Science Conference Proceedings (OSTI)

We have realized a which-way experiment closely resembling the original Feynman's proposal exploiting focused ion beam milling to prepare two nanoslits and electron beam induced deposition to grow, selectively over one of them, electron transparent layers of low atomic number amorphous material to realize a which-way detector for high energy electrons. By carrying out the experiment in an electron microscope equipped with an energy filter, we show that the inelastic scattering of electron transmitted through amorphous layers of different thicknesses provides the control of the dissipative interaction process responsible for the localization phenomena which cancels out the interference effects.

Frabboni, Stefano [Department of Physics, University of Modena and Reggio Emilia and CNR-Institute of Nanoscience-S3, via G. Campi 213/a, 41100 Modena (Italy); Gazzadi, Gian Carlo [CNR-Institute of Nanoscience-S3, via G. Campi 213/a, 41100 Modena (Italy); Pozzi, Giulio [Department of Physics, University of Bologna, viale B. Pichat 6/2, 40127 Bologna (Italy)

2010-12-27T23:59:59.000Z

111

Interesting Electronic and Dynamic Properties of Quantum Dot Quantum Wells and other Semiconductor Nanocrystal Heterostructures .  

E-Print Network (OSTI)

??Some interesting electronic and dynamic properties of semiconductor nanocrystal heterostructures have been investigated using various spectroscopic methods. Semiconductor nanocrystal heterostructures were prepared using colloidal synthesis… (more)

Schill, Alexander Wilhem

2006-01-01T23:59:59.000Z

112

Effects of asymmetry on electron spin dynamics in gallium arsenide quantum wells.  

E-Print Network (OSTI)

??This work presents optical studies of electron spin dynamics in gallium arsenide (GaAs) quantum wells, focusing on the effect of inversion asymmetric confinement potentials on… (more)

Eldridge, Peter Stephen

2009-01-01T23:59:59.000Z

113

Studying Fischer-Tropsch catalysts using transmission electron microscopy and model systems of nanoparticles on planar supports.  

SciTech Connect

Nanoparticle model systems on planar supports form a versatile platform for studying morphological and compositional changes of catalysts due to exposure to realistic reaction conditions. We review examples from our work on iron and cobalt catalysts, which can undergo significant rearrangement in the reactive environment of the Fischer-Tropsch synthesis. The use of specially designed, silicon based supports with thin film SiO{sub 2} enables the application of transmission electron microscopy, which has furnished important insight into e.g. the mechanisms of catalyst regeneration.

Thune, P. C.; Weststrate, C. J.; Moodley, P.; Saib, A. M.; van de Loosdrecht, J.; Miller, J. T.; Niemantsverdriet, J. W. (Chemical Sciences and Engineering Division); (Eindhoven Univ. of Technology); (Sasol Technology)

2011-01-01T23:59:59.000Z

114

NIST Transmission SEM  

Science Conference Proceedings (OSTI)

... As a result, more electrons will scatter, to provide the ... RR Keller, "Transmission EBSD in the Scanning Electron Microscope," Microscopy Today vol. ...

2013-07-29T23:59:59.000Z

115

Electron, Photon, and Positron Scattering Dynamics of Complex Molecular Targets  

E-Print Network (OSTI)

Electron scattering cross sections have been computed for pyridine and pyrimidine using the static-exchange approximation with model potential to account for dynamic electron correlation. To obtain well-converged orbitals, we have expanded all partial waves to a maximum angular momentum of l = 60 for both targets. We have obtained total cross sections for electron scattering energies to 20 eV. Both targets display similar features, namely a dipole-induced increase in the integrated cross section at scattering energies below 5 eV, and peaks corresponding to resonances in b1, a2, and b1 symmetries. These resonances were investigated through a Siegert eigenstate analysis and Breit-Wigner fit of the SECP eigenphase sums. They were also compared to the virtual orbitals obtained from a minimum basis set Hartree-Fock calculation on both targets. We consider electron scattering resonances from cis-diamminedichloroplatinum, [Pt(NH3)2Cl2], the ligand molecular species Cl2 (1Sigma+g ), and the isolated transition metal center Pt in a nondegenerate atomic state (1S) at the SECP level of theory. As a rigorous comparison to the single-state, single-configuration SECP level results of these smaller, yet electron dense targets, we have also considered scattering from ground state Cl2 and Pt in the 1S and 3D states in the multichannel configuration-interaction (MCCI) approximation originally developed for photoionization for scattering up to 10 eV. Photoionization cross sections and angular distributions in the recoil frame (RFPAD) and molecular frame (MFPAD) have been computed for inner-shell C 1s and Cl 2p ionization from the chloroalkanes chloromethane and chloroethane, with ionization leading to a variety of ionic fragment states. We have also computed valence level ionization from the nitro molecule nitromethane CH3NO2 leading to the dissociation of the CN bond. All of these calculations were performed in the frozen-core Hartree-Fock approximation. Even at this level of theory, we obtain computed results that compare well to the photoelectronphotoion coincidence measurements. The fullerene C20 is the smallest fullerene predicted to exist, with most relevant structural calculations suggesting the reduction of the icosahedral symmetry into one in which the target species possesses at maximum only a dihedral axis. We have computed positron scattering cross sections for the molecule in two low-symmetry structural isomers Ci and C2, within the HF approximation. Density functional expressions were used to incorporate important positron-electron interactions within the calculation. We have found similar cross sections and resonance features for both isomers, including a positron scattering resonance whose density is found within the framework of the fullerene cluster.

Carey, Ralph

2012-05-01T23:59:59.000Z

116

Aberration Corrected Analytical Electron Microscope  

Science Conference Proceedings (OSTI)

... resolution scanning transmission electron microscope (STEM), where ... the beam electrons as they ... filtered transmission electron microscopy (EFTEM ...

2012-10-01T23:59:59.000Z

117

Electron beam dynamics for the ISIS bremsstrahlung beam generation system  

E-Print Network (OSTI)

An electron beam transport system was designed for use in the Bremsstrahlung Beam Generation System of the Integrated Stand-off Inspection System (ISIS). The purpose of this electron transport system was to provide for ...

Block, Robert E. (Robert Edward)

2011-01-01T23:59:59.000Z

118

Electronic Structure and Excited-State Dynamics at Donor ...  

Science Conference Proceedings (OSTI)

... greatly reduced manufacturing cost compared to ... electronic structure and energy level alignment ... heterojunctions by employing time-resolved pump ...

2012-10-02T23:59:59.000Z

119

Electron-nuclear correlations for photo-induced dynamics in molecular dimers  

E-Print Network (OSTI)

Ultrafast photoinduced dynamics of electronic excitation in molecular dimers is drastically affected by the dynamic reorganization of inter- and intra- molecular nuclear configuration modeled by a quantized nuclear degree of freedom [Cina et. al, J. Chem Phys. {118}, 46 (2003)]. The dynamics of the electronic population and nuclear coherence is analyzed by solving the chain of coupled differential equations for %mean coordinate, population inversion, electron-vibrational correlation, etc. [Prezhdo, Pereverzev, J. Chem. Phys. {113} 6557 (2000)]. Intriguing results are obtained in the approximation of a small change of the nuclear equilibrium upon photoexcitation. In the limiting case of resonance between the electronic energy gap and the frequency of the nuclear mode these results are justified by comparison to the exactly solvable Jaynes-Cummings model. It is found that the photoinduced processes in the model dimer are arranged according to their time scales: (i) fast scale of nuclear motion, (ii) intermediate scale of dynamical redistribution of electronic population between excited states as well as growth and dynamics of electron-nuclear correlation, (iii) slow scale of electronic population approach to the quasi-equilibrium distribution, decay of electron-nuclear correlation, and decrease of the amplitude of mean coordinate oscillation. The latter processes are accompanied by a noticeable growth of the nuclear coordinate dispersion associated with the overall nuclear wavepacket width. The demonstrated quantum relaxation features of the photoinduced vibronic dynamics in molecular dimers are obtained by a simple method, applicable to systems with many degrees of freedom.

Dmitri S. Kilin; Yuri V. Pereversev; Oleg V. Prezhdo

2004-03-13T23:59:59.000Z

120

Controllable coupling and quantum correlation dynamics of two double quantum dots coupled via a transmission line resonator  

E-Print Network (OSTI)

We propose a theoretical scheme to generate a controllable and switchable coupling between two double-quantum-dot (DQD) spin qubits by using a transmission line resonator (TLR) as a bus system. We study dynamical behaviors of quantum correlations described by entanglement correlation (EC) and discord correlation (DC) between two DQD spin qubits when the two spin qubits and the TLR are initially prepared in $X$-type quantum states and a coherent state, respectively. We demonstrate that in the EC death regions there exist DC stationary states in which the stable DC amplification or degradation can be generated during the dynamical evolution. It is shown that these DC stationary states can be controlled by initial-state parameters, the coupling, and detuning between qubits and the TLR. We reveal the full synchronization and anti-synchronization phenomena in the EC and DC time evolution, and show that the EC and DC synchronization and anti-synchronization depends on the initial-state parameters of the two DQD spin qubits. These results shed new light on dynamics of quantum correlations.

Qin-Qin Wu; Qing-Shou Tan; Le-Man Kuang

2010-11-25T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Aberration corrected scanning transmission electron microscopy and electron energy loss spectroscopy studies of epitaxial Fe/MgO/(001)Ge heterostructures  

SciTech Connect

Aberration correction in the scanning transmission electron microscope combined with electron energy loss spectroscopy allows simultaneous mapping of the structure, the chemistry and even the electronic properties of materials in one single experiment with spatial resolutions of the order of one Angstrom. Here the authors will apply these techniques to the characterization of epitaxial Fe/MgO/(001)Ge and interfaces with possible applications for tunneling junctions, and the authors will show that epitaxial MgO films can be grown on a (001)Ge substrates by molecular beam epitaxy and how it is possible to map the chemistry of interfaces with atomic resolution. Epitaxial growth of insulator oxides on semiconductors constitutes a key issue within the field of electronics, and a considerably large effort has been devoted to harness the growth of high-k oxides on Si. Ge, due to its high electronic and hole mobility, is a very interesting alternative as a potential substrate for future high performance complementary metal-oxide-semiconductor field-effect transistors. However, a major issue is to avoid the high resistivity at the source and drain contacts ensuing from the pinning of the Fermi level at the valence-band maximum. It has been suggested that this problem could be fixed by depositing a thin insulating tunneling barrier between the Ge substrate and the metal contacts. In this case, single crystal epitaxy would represent an additional benefit, since it would lead to a reduction of interfacial defects and improved performance of the tunneling barrier. MgO has been suggested to fulfill such requisites. Furthermore, MgO has been demonstrated to be a good substrate for epitaxial growth of transition metals thin films, such as Fe and Co, thus avoiding the potential problem of chemical reactivity with Ge. In such a scenario, epitaxial deposition of high quality MgO films on Ge substrates is highly desirable. But in addition, successful epitaxial growth of MgO on a semiconductor would also constitute a plus for applications in spintronics, since the injection of a spin polarized current from a ferromagnetic electrode to a non-magnetic semiconductor requires the presence of a potential barrier. MgO represents a convenient choice because the symmetry filtering properties at the interface with transition metals would allow an efficient spin filtering effect. For this approach to succeed, a suitable semiconducting substrate where MgO can be grown epitaxially must be found. And again, while GaAs and Si have been investigated for such role, Ge has not received much attention so far. In this study the authors report on the atomic resolution characterization of high quality interfaces in Fe/MgO/(001)Ge heterostructures. The study of the defects, the inhomogeneities and the interface structure of such junctions is a must to pave the way toward future applications. For this aim, the combination of scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) is a most useful tool, since it allows these features to be probed with atomic resolution. Spherical aberration correction in the STEM allows for increased contrast, allowing even single atoms to be detected both in imaging and spectroscopy.

Gazquez Alabart, Jaume [ORNL; Varela del Arco, Maria [ORNL; Petti, D. [Politecnico di Milano; Cantoni, M. [Politecnico di Milano; Rinaldi, C. [Politecnico di Milano; Brivio, S. [Politecnico di Milano; Bertacco, R. [Politecnico di Milano

2011-01-01T23:59:59.000Z

122

Trajectory-Wave Approach to Electron Dynamics in Hydrogen Atom  

E-Print Network (OSTI)

In this work we propose a new approach to the explanation of the nature of electron based on the corpuscular-wave monism using the further development of the optical-mechanical analogy to describe the physical reality. In this theory the motion of an electron is considered to occur along a trajectory the presence of which is a reflection of the existence of a particle, as well as it is assumed that any motion is defined by a wave V(x,t). It is assumed that there is an explicit relationship between the trajectory and wave equations of the electron, which are established on the basis of the local variational principle. In this approach, an electron wave propagating in free space takes along the electron trajectory. We used this theory to describe the electron motion in a hydrogen-like atom and found its stationary states. The energies of these states coincide with the known quantum mechanics solutions for the stationary energies of the hydrogen-like atom, however, in our approach the spatial trajectories of the electron have the form of the surfaces, which are formed in the region of nodes of the standing electron wave. These surfaces have the form of spheres for the spherical symmetrical electron states and the radii of these spheres coincide with the radii of the Bohr orbits of these states. Thus, in this approach the trajectory and wave measurements of the electron get a consistent spatial description that is inherent to the picture of the corpuscular-wave monism. We discuss the considerable correspondence of the proposed theory with the quantum mechanics results describing the stationary and non-stationary motions of the electron in the atom and their difference. We believe that measuring of the spatial configuration of the observed electron trajectory surfaces in an atom could be a deep examination of the standard quantum theory.

N. T. Valishin; F. T. Valishin; S. A. Moiseev

2011-02-08T23:59:59.000Z

123

Large-scale Excited Electron Molecular Mechanics/Dynamics  

Science Conference Proceedings (OSTI)

Abstract Scope, To simulate large electronically excited systems, we have developed [at the Materials and Process Simulation Center at Caltech] a molecular ...

124

Atomic-resolution study of polarity reversal in GaSb grown on Si by scanning transmission electron microscopy  

SciTech Connect

The atomic-resolved reversal of the polarity across an antiphase boundary (APB) was observed in GaSb films grown on Si by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The investigation of the interface structure at the origin of the APB reveals that coalescence of two domains with Ga-prelayer and Sb-prelayer causes the sublattice reversal. The local strain and lattice rotation distributions of the APB, attributed to the discordant bonding length at the APB with the surrounding GaSb lattice, were further studied using the geometric phase analysis technique. The crystallographic characteristics of the APBs and their interaction with other planar defects were observed with HAADF-STEM. The quantitative agreement between experimental and simulated images confirms the observed polarities in the acquired HAADF-STEM data. The self-annihilation mechanism of the APBs is addressed based on the rotation induced by anti-site bonds and APBs' faceting.

Hosseini Vajargah, S.; Woo, S. Y.; Botton, G. A. [Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Brockhouse Institute for Material Research, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Canadian Centre for Electron Microscopy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Ghanad-Tavakoli, S. [Centre for Emerging Device Technologies, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Kleiman, R. N.; Preston, J. S. [Brockhouse Institute for Material Research, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Centre for Emerging Device Technologies, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S 4L7 (Canada)

2012-11-01T23:59:59.000Z

125

Single-molecule interfacial electron transfer dynamics manipulated by external electric current  

E-Print Network (OSTI)

Interfacial electron transfer (IET) dynamics in 1,1'-dioctadecyl-3, 3, 3', 3'-tetramethylindodicarbocyanine (DiD) dye molecules / indium tin oxide (ITO) film system have been probed at the ensemble and single-molecule level by recording the change of fluorescence emission intensity. By comparing the difference of the external electric current (EEC) dependence of lifetime and intensity for enambles and single molecules, it is shown that the single-molecule probe can effcienly demonstrate the IET dynamics. The backward electron transfer and electron transfer of ground state induce the single molecules fluorescence quenching when an EEC is applied to ITO film.

Zhang, Guofeng; Chen, Ruiyun; Gao, Yan; Wang, Xiaobo; Jia, Suotang

2011-01-01T23:59:59.000Z

126

Transient Dynamics in Molecular Junctions: Coherent Bichromophoric Molecular Electron Pumps  

E-Print Network (OSTI)

The possibility of using single molecule junctions as electron pumps for energy conversion and storage is considered. It is argued that the small dimensions of these systems enable to make use of unique intra-molecular quantum coherences in order to pump electrons between two leads and to overcome relaxation processes which tend to suppress the pumping efficiency. In particular, we demonstrate that a selective transient excitation of one chromophore in a bi-chromophoric donor-bridge-acceptor molecular junction model yields currents which transfer charge (electron and holes) unevenly to the two leads in the absence of a bias potential. The utility of this mechanism for charge pumping in steady state conditions is proposed.

Volkovich, Roie

2010-01-01T23:59:59.000Z

127

Transient Dynamics in Molecular Junctions: Coherent Bichromophoric Molecular Electron Pumps  

E-Print Network (OSTI)

The possibility of using single molecule junctions as electron pumps for energy conversion and storage is considered. It is argued that the small dimensions of these systems enable to make use of unique intra-molecular quantum coherences in order to pump electrons between two leads and to overcome relaxation processes which tend to suppress the pumping efficiency. In particular, we demonstrate that a selective transient excitation of one chromophore in a bi-chromophoric donor-bridge-acceptor molecular junction model yields currents which transfer charge (electron and holes) unevenly to the two leads in the absence of a bias potential. The utility of this mechanism for charge pumping in steady state conditions is proposed.

Roie Volkovich; Uri Peskin

2010-12-01T23:59:59.000Z

128

A Comparison of Electron-Transfer Dynamics in Ionic Liquids and Neutral  

NLE Websites -- All DOE Office Websites (Extended Search)

Electron-Transfer Dynamics in Ionic Liquids and Neutral Electron-Transfer Dynamics in Ionic Liquids and Neutral Solvents Heather Y. Lee, Joseph B. Issa, Stephan S. Isied, Edward W. Castner, Jr., Yunfeng Pan, Charles L. Hussey, Kwang Soon Lee, and James F. Wishart J. Phys. Chem. C 116, 5197-5208 (2012). [Find paper at ACS Publications] or use ACS Articles on Request. Abstract: The effect of ionic liquids on photoinduced electron-transfer reactions in a donor-bridge-acceptor system is examined for two ionic liquid solvents, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide and tributylmethylammonium bis(trifluoromethyl¬sulfonyl)¬amide. The results are compared with those for the same system in methanol and acetonitrile solution. Electron-transfer rates were measured using time-resolved fluorescence quenching for the donor-bridge-acceptor system comprising a

129

Entangled valence electron-hole dynamics revealed by stimulated attosecond x-ray Raman scattering  

SciTech Connect

We show that broadband x-ray pulses can create wavepackets of valence electrons and holes localized in the vicinity of a selected atom (nitrogen, oxygen or sulfur in cysteine) by resonant stimulated Raman scattering. The subsequent dynamics reveals highly correlated motions of entangled electrons and hole quasiparticles. This information goes beyond the time-dependent total charge density derived from x-ray diffraction.

Healion, Daniel; Zhang, Yu; Biggs, Jason D.; Govind, Niranjan; Mukamel, Shaul

2012-09-06T23:59:59.000Z

130

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TrakLok Corporation TrakLok Corporation Oak Ridge National Laboratory 463 likes TrakLok, Inc., based in Knoxville, Tenn., intends to use an Oak Ridge National Laboratory (ORNL)-developed, technology for tagging, tracking, locating and communicating with cargo containers and trailers in transit. The ORNL technology provides an avenue to meet increasing requirements for shipping containers to be "smart boxes" that can be tracked electronically. TrakLok uses GPS technology and satellite communications as part of its tracking and warning capability and international container locking technology to protect against container tampering, theft, vandalism and smuggling. Shipments can be tracked through a web-accessible, information technology-based global tracking system to provide real time visibility of

131

Probing the electrostatic potential of charged dislocations in n-GaN and n-ZnO epilayers by transmission electron holography  

SciTech Connect

Epitaxial layers frequently contain a high density of threading dislocations, which may exceed values of 10{sup 9} cm{sup -2} for ZnO and GaN. To study the electrical activity of single dislocations off-axis electron holography in a transmission electron microscope was applied. The electrostatic potential in the vicinity of charged dislocations was determined from the reconstructed phase of the electron wave, which also provides access to the charge density at the dislocation. On the basis of the electrostatic potential for a screened line charge given by Read [Philos. Mag. 45, 775 (1954)] a refined model is proposed in which a charge density with a finite spatial distribution at the dislocation core is assumed. Comparing the measured and theoretically expected potential, charge densities between 5x10{sup 19} cm{sup -3} and 5x10{sup 20} cm{sup -3} in cylinders with radii up to 5 nm around the dislocation lines were found. An important aspect of our work is the analysis of dislocations in cross-section transmission electron microscopy samples where the dislocation lines are oriented perpendicular to the electron beam. The advantages and drawbacks of the cross-section geometry are discussed. Electrostatic potentials due to piezoelectric charges in the dislocation strain field are considered and found to be insignificant with respect to dislocation charges.

Mueller, E.; Gerthsen, D.; Brueckner, P.; Scholz, F.; Gruber, Th.; Waag, A. [Laboratorium fuer Elektronenmikroskopie, Universitaet Karlsruhe (Thailand) 76128 Karlsruhe (Germany); Abteilung Optoelektronik, Universitaet Ulm, D-89069 Ulm (Germany); Abteilung Halbleiterphysik, Universitaet Ulm, D-89069 Ulm (Germany); Institut fuer Halbleitertechnik, Universitaet Braunschweig, D-38106 Braunschweig (Germany)

2006-06-15T23:59:59.000Z

132

Transmission Line Protection Support Tools: Fault Location Algorithms and the Potential of Using Intelligent Electronic Device Data for Protection Applications  

Science Conference Proceedings (OSTI)

Overhead transmission lines experience short-circuit faults due to lightning, stormy weather conditions, animal or tree contact, and insulation failure in power system equipment. To ensure continuity of electric service, utilities try to quickly determine the location of the fault, perform maintenance or repair, and return the line to service. Due to advances in modern technology, locating faults in a networked transmission system is now possible with substantial accuracy. Voltage and current ...

2013-12-23T23:59:59.000Z

133

Inhomogeneous dynamic nuclear polarization and suppression of electron-polarization decay in a quantum dot  

E-Print Network (OSTI)

We investigate the dynamic nuclear polarization process by frequently injecting polarized electron spins into a quantum dot. Due to the suppression of the direct dipolar and indirect electron-mediated nuclear spin interactions, by the frequently injected electron spins, the analytical predictions under the independent spin approximation agree well with quantum numerical simulations. Our results show that the acquired nuclear polarization is highly inhomogeneous, proportional to the square of the local electron-nuclear hyperfine interaction constant, if the injection frequency is high. Utilizing the inhomogeneously polarized nuclear spins as an initial state, we further show that the electron-polarization decay time can be extended 100 times even at a relatively low nuclear polarization (<20%), without much suppression of the fluctuation of the Overhauser field. Our results lay the foundation for future investigations of the effect of DNP in more complex spin systems, such as double quantum dots and nitrogen vacancy centers in diamonds.

Na Wu; Wenkui Ding; Anqi Shi; Wenxian Zhang

2013-03-04T23:59:59.000Z

134

Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization  

E-Print Network (OSTI)

One fundamental requirement for quantum computation is to perform universal manipulations of quantum bits at rates much faster than the qubit's rate of decoherence. Recently, fast gate operations have been demonstrated in logical spin qubits composed of two electron spins where the rapid exchange of the two electrons permits electrically controllable rotations around one axis of the qubit. However, universal control of the qubit requires arbitrary rotations around at least two axes. Here we show that by subjecting each electron spin to a magnetic field of different magnitude we achieve full quantum control of the two-electron logical spin qubit with nanosecond operation times. Using a single device, a magnetic field gradient of several hundred milliTesla is generated and sustained using dynamic nuclear polarization of the underlying Ga and As nuclei. Universal control of the two-electron qubit is then demonstrated using quantum state tomography. The presented technique provides the basis for single and potent...

Foletti, Sandra; Mahalu, Diana; Umansky, Vladimir; Yacoby, Amir; 10.1038/nphys1424

2010-01-01T23:59:59.000Z

135

Transmission INTRODUCTION  

E-Print Network (OSTI)

Transmission INTRODUCTION An electrical power system requires constant, second by second, balancing to maintain control over the transmission system can result in failure of the entire electrical system of supply, demand, and transmission capability. Transmission system operators are primarily responsible

136

Pseudo Slice Energy Spread in Dynamics of Electron Beams Moving through Magnetic Bends  

E-Print Network (OSTI)

In the previous canonical formulation of beam dynamics for an electron bunch moving ultrarelativistically through magnetic bending systems, we have shown that the transverse dynamics equation for a particle in the bunch has a driving term which behaves as the centrifugal force caused by the particle's initial potential energy due to collective particle interactions within the bunch. As a result, the initial potential energy at the entrance of a bending system, which we call pseudo (kinetic) energy, is indistinguishable from the usual kinetic energy offset from the design energy in its perturbation to particle optics through dispersion and momentum compaction. In this paper, in identifying this centrifugal force on particles as the remnant of the CSR cancellation effect in transverse particle dynamics, we show how the dynamics equation in terms of the canonical momentum for beam motion on a curved orbit is related to the Panofsky-Wenzel theorem for wakefields for beam motion on a straight path. It is shown tha...

Li, Rui

2014-01-01T23:59:59.000Z

137

What do we gain from gamma? Local dynamic gain modulation drives enhanced efficacy and efficiency of signal transmission  

E-Print Network (OSTI)

Gamma oscillations in neocortex are hypothesized to improve information transmission between groups of neurons. We recently showed that optogenetic drive of fast-spiking interneurons (FS) at 40 Hz in mouse neocortex in ...

Knoblich, Ulf

138

Dynamic nuclear polarization with simultaneous excitation of electronic and nuclear transitions  

E-Print Network (OSTI)

Dynamic nuclear polarization transfers spin polarization from electrons to nuclei. We have achieved this by a new method, simultaneously exciting transitions of electronic and nuclear spins. The efficiency of this technique improves with increasing magnetic field. Experimental results are shown for N@C60 with continuous-wave microwaves, which can be expected to produce even higher polarization than the corresponding pulsed techniques for electron spins greater than 1/2. The degree of nuclear polarization in this case can be easily monitored through the intensities of the well resolved hyperfine components in the EPR spectrum. The nuclear spin-lattice relaxation time is orders of magnitude longer than that of the electrons.

G. W. Morley; K. Porfyrakis; A. Ardavan; J. van Tol

2008-05-28T23:59:59.000Z

139

Nano-electron beam induced current and hole charge dynamics through uncapped Ge nanocrystals  

Science Conference Proceedings (OSTI)

Dynamics of hole storage in spherical Ge nanocrystals (NCs) formed by a two step dewetting/nucleation process on an oxide layer grown on an n-doped silicon substrate is studied using a nano-electron beam induced current technique. Carrier generation is produced by an electron beam irradiation. The generated current is collected by an atomic force microscope--tip in contact mode at a fixed position away from the beam spot of about 0.5 {mu}m. This distance represents the effective diffusion length of holes. The time constants of holes charging are determined and the effect of the NC size is underlined.

Marchand, A.; El Hdiy, A.; Troyon, M. [Laboratoire de Recherche en Nanosciences, Bat. 6, case no 15, UFR Sciences, Universite de Reims Champagne Ardenne, 51687 Reims Cedex 2 (France); Amiard, G.; Ronda, A.; Berbezier, I. [IM2NP, Faculte des Sciences et Techniques, Campus de Saint Jerome - Case 142, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20 (France)

2012-04-16T23:59:59.000Z

140

High resolution low dose transmission electron microscopy real-time imaging and manipulation of nano-scale objects in the electron beam  

DOE Patents (OSTI)

The present invention includes a method, apparatus and system for nanofabrication in which one or more target molecules are identified for manipulation with an electron beam and the one or more target molecules are manipulated with the electron beam to produce new useful materials.

Brown, Jr., R. Malcolm (Austin, TX); Barnes, Zack (Austin, TX); Sawatari, Chie (Shizuoka, JP); Kondo, Tetsuo (Kukuoka, JP)

2008-02-26T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Power Electronics for Distributed Energy Systems and Transmission and Distribution Applications: Assessing the Technical Needs for Utility Applications  

DOE Green Energy (OSTI)

Power electronics can provide utilities the ability to more effectively deliver power to their customers while providing increased reliability to the bulk power system. In general, power electronics is the process of using semiconductor switching devices to control and convert electrical power flow from one form to another to meet a specific need. These conversion techniques have revolutionized modern life by streamlining manufacturing processes, increasing product efficiencies, and increasing the quality of life by enhancing many modern conveniences such as computers, and they can help to improve the delivery of reliable power from utilities. This report summarizes the technical challenges associated with utilizing power electronics devices across the entire spectrum from applications to manufacturing and materials development, and it provides recommendations for research and development (R&D) needs for power electronics systems in which the U.S. Department of Energy (DOE) could make a substantial impact toward improving the reliability of the bulk power system.

Tolbert, L.M.

2005-12-21T23:59:59.000Z

142

High Resolution Transmission Microscopy Characterization of an ...  

Science Conference Proceedings (OSTI)

High Resolution Transmission Microscopy Characterization of an Oxide ... Line Dislocation Dynamics Simulation of fundamental dislocation properties in ...

143

The Design and Performance of Waveguide Transmission Line Components for Plasma Electron Cyclotron Heating (ECH) Systems (A22776)  

E-Print Network (OSTI)

Proc. Of The 17th IEEE/NPSS Symp. On Fusion Engineering, San Diego, California (Institute Of Electrical And Electronics Engineers, Inc., Piscataway, New Jersey) To Be Published.17th IEEE/NPSS Symposium on Fusion Engineering San Diego California, US, 1997932759827

O'Neill, R.C.

1997-10-06T23:59:59.000Z

144

Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization  

E-Print Network (OSTI)

One fundamental requirement for quantum computation is to perform universal manipulations of quantum bits at rates much faster than the qubit's rate of decoherence. Recently, fast gate operations have been demonstrated in logical spin qubits composed of two electron spins where the rapid exchange of the two electrons permits electrically controllable rotations around one axis of the qubit. However, universal control of the qubit requires arbitrary rotations around at least two axes. Here we show that by subjecting each electron spin to a magnetic field of different magnitude we achieve full quantum control of the two-electron logical spin qubit with nanosecond operation times. Using a single device, a magnetic field gradient of several hundred milliTesla is generated and sustained using dynamic nuclear polarization of the underlying Ga and As nuclei. Universal control of the two-electron qubit is then demonstrated using quantum state tomography. The presented technique provides the basis for single and potentially multiple qubit operations with gate times that approach the threshold required for quantum error correction.

Sandra Foletti; Hendrik Bluhm; Diana Mahalu; Vladimir Umansky; Amir Yacoby

2010-09-27T23:59:59.000Z

145

Modification of Defect Structures in Graphene by Electron Irradiation: Ab Initio Molecular Dynamics Simulations  

SciTech Connect

Defects play an important role on the unique properties of the sp2-bonded materials, such as graphene. The creation and evolution of mono-vacancy, di-vacancy, Stone-Wales (SW) and grain boundaries (GBs) under irradiation in graphene are investigated using density functional theory and time-dependent density functional theory molecular dynamics simulations. It is of great interest to note that the patterns of these defects can be controlled through electron irradiation. The SW defects can be created by electron irradiation with energy of above the displacement threshold energy (Td, {approx}19 eV) and can be healed with an energy (14-18 eV) lower than Td. The transformation between four types of divacancies, V2(5-8-5), V2(555-777), V2(5555-6-7777), and V2(55-77) can be realized through bond rotation induced by electron irradiation. The migrations of divancancies, SW defects, and GBs can also be controlled by electron irradiation. Thus, electron irradiation can serve as an important tool to modify morphology in a controllable manner, and to tailor the physical properties of graphene.

Wang, Zhiguo; Zhou, Yungang; Bang, Junhyeok; Prange, Micah P.; Zhang, Shengbai; Gao, Fei

2012-08-02T23:59:59.000Z

146

Scanning Confocal Electron Microscope (SCEM)  

Transmission/Scanning Transmission Electron Microscope. The SCEM enables imaging of sub-surface structures of thick, optically opaque materials, ...

147

Advantages of Integrating Precession Scanning Transmission ...  

Science Conference Proceedings (OSTI)

Presentation Title, Advantages of Integrating Precession Scanning Transmission Electron Microscopy in the Characterization of Metallic Materials. Author(s) ...

148

Nanosecond in situ transmission electron microscope studies of the reversible Ge{sub 2}Sb{sub 2}Te{sub 5} crystalline <==> amorphous phase transformation  

SciTech Connect

Chalcogenide-based phase-change materials have wide use in optical recording media and are growing in importance for use in non-volatile electronic memory. For both applications, rapid switching between the amorphous and crystalline phases is necessary, and understanding the changes during rapidly driven phase transitions is of scientific and technological significance. Laser-induced crystallization and amorphization occur rapidly and changes in atomic structure, microstructure, and temperature are difficult to observe experimentally and determine computationally. We have used nanosecond-scale time-resolved diffraction with intense electron pulses to study Ge{sub 2}Sb{sub 2}Te{sub 5} during laser crystallization. Using a unique and unconventional specimen geometry, cycling between the amorphous and crystalline phases was achieved, enabling in situ transmission electron microscope (TEM) study of both microstructural and crystallographic changes caused by repeated switching. Finite element analysis was used to simulate interactions of the laser with the nano-structured specimens and to model the rapidly changing specimen temperature. Such time-resolved experimental methods combined with simulation of experimentally inaccessible physical characteristics will be fundamental to advancing the understanding of rapidly driven phase transformations.

Santala, M. K.; Reed, B. W.; LaGrange, T.; Campbell, G. H.; Browning, N. D. [Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States); Topuria, T. [IBM Research Division, Almaden Research Center, San Jose, California 95120 (United States); Raoux, S. [IBM T. J. Watson Research Center, Yorktown Heights, New York 10598 (United States); Meister, S. [Intel Corporation, Hillsboro, Oregon 97124 (United States); Cui, Y. [Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 (United States)

2012-01-15T23:59:59.000Z

149

Ultrafast time dynamics studies of periodic lattices with free electron laser radiation  

Science Conference Proceedings (OSTI)

It has been proposed that radiation from free electron laser (FEL) at Hamburg (FLASH) can be used for ultrafast time-resolved x-ray diffraction experiments based on the near-infrared (NIR) pump/FEL probe scheme. Here, investigation probing the ultrafast structural dynamics of periodic nano-crystalline organic matter (silver behenate) with such a scheme is reported. Excitation with a femtosecond NIR laser leads to an ultrafast lattice modification which time evolution has been studied through the scattering of vacuum ultraviolet FEL pulses. The found effect last for 6 ps and underpins the possibility for studying nanoperiodic dynamics down to the FEL source time resolution. Furthermore, the possibility of extending the use of silver behenate (AgBh) as a wavelength and temporal calibration tool for experiments with soft x-ray/FEL sources is suggested.

Quevedo, W.; Busse, G.; Hallmann, J.; More, R.; Petri, M.; Rajkovic, I. [Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen (Germany); Krasniqi, F.; Rudenko, A. [Max Planck Advanced Study Group at CFEL, Notkestrasse 85, 22607 Hamburg (Germany); Tschentscher, T. [European XFEL GmbH, Albert-Einstein-Ring 19, 22671 Hamburg (Germany); Stojanovic, N.; Duesterer, S.; Treusch, R.; Tolkiehn, M. [HASYLAB at DESY, Notkestrasse 85, 22607 Hamburg (Germany); Techert, S. [Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen (Germany); Max Planck Advanced Study Group at CFEL, Notkestrasse 85, 22607 Hamburg (Germany)

2012-11-01T23:59:59.000Z

150

Dynamic  

Office of Legacy Management (LM)

Dynamic Dynamic , and Static , Res.ponse of the Government Oil Shale Mine at ' , . , Rifle, Colorado, to the Rulison Event. , . ; . . DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. p ( y c - - a 2-1 0 -4- REPORT AT (29-2) 914 USBM 1 0 0 1 UNITED STATES DEPARTMENT O F THE I NTERIOR BUREAU OF MINES e s.09 P. L. R U S S E L L RESEARCH D l RECTOR Februory 2, lB7O DYNAMIC AND STATIC RESPONSE 'OF THE GOVERNMENT OIL SHALE MINE A T RIFLE, COLORADO, T O THE, RULISON EVENT ORDER FROM CFSTl A S ~ B ~ &J C / This page intentionally left blank CONTENTS Page . . . . . . . . . . . . . . . . . . . . . . . . . H i s t o r i c . a l Des c r i p t i o n 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 3

151

Non-diffusive spin dynamics in a two-dimensional electron gas  

SciTech Connect

We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs/GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are used to probe the relaxation rates of spin polarization waves in the wavevector range from zero to 6 x 10{sup 4} cm{sup -1}. We find that the spin polarization lifetime is maximal at nonzero wavevector, in contrast with expectation based on ordinary spin diffusion, but in quantitative agreement with recent theories that treat diffusion in the presence of spin-orbit coupling.

Weber, C.P.

2010-04-28T23:59:59.000Z

152

Quantum Chemical Analysis of the Excited State Dynamics of Hydrated Electrons  

E-Print Network (OSTI)

Quantum calculations are performed for an anion water cluster representing the first hydration shell of the solvated electron in solution. The absorption spectra from the ground state, the instant excited states and the relaxed excited states are calculated including CI-SD interactions. Analytic expressions for the nonadiabatic relaxation are presented. It is shown that the 50fs dynamics recently observed after s->p excitation is best accounted for if it is identified with the internal conversion, preceded by an adiabatic relaxation within the excited p state. In addition, transient absorptions found in the infrared are qualitatively reproduced by these calculations .

P. O. J. Scherer; Sighart F. Fischer

2006-02-01T23:59:59.000Z

153

A Physically-Intuitive Method for Calculation of the Local Lattice Constant from a High-Resolution Transmission Electron Microscopy Image by Fourier Analysis  

E-Print Network (OSTI)

We have developed a physically-intuitive method to calculate the local lattice constant as a function of position in a high-resolution transmission electron microscopy image by performing a two-dimensional fast Fourier transform. We apply a Gaussian filter with appropriate spatial full-width-half-max (FWHM) bandwidth to the image centered at the desired location to calculate the local lattice constant (as opposed to the average lattice constant). Fourier analysis of the filtered image yields the vertical and horizontal lattice constants at this location. The process is repeated by stepping the Gaussian filter across the image to produce a set of local lattice constants in the vertical and horizontal direction as a function of position in the image. The method has been implemented in a freely available tool on nanoHUB.

Teherani, James T

2013-01-01T23:59:59.000Z

154

Transmission Electron Microscope Study on Electrodeposited Gd2O3 and Gd2Zr2O7 Buffer Layers forYBa2Cu307-..delta.. Superconductors  

SciTech Connect

We have investigated the microstructures of electrodeposited Gd{sub 2}O{sub 3} (GO) and Gd{sub 2}Zr{sub 2}O{sub 7} (GZO) buffer layers for YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) superconductors with conventional transmission electron microscopy (TEM). A high density of nanoscale voids was present in the GZO buffer layers. No voids were observed in GO buffer layers grown on GZO. YBCO superconductor grown on the GO/GZO buffer layer structure produced a critical current density (J{sub c}) of 3.3 x 10{sup 6} A/cm{sup 2} at 77 K in zero field.

Zhao, W.; Norman, A.; Phok, S.; Bhattacharya, R.

2008-01-01T23:59:59.000Z

155

Acceleration and dynamics of an electron in the degenerate and magnetized plasma elliptical waveguide  

SciTech Connect

The dynamics and energy gain of an electron in the field of a transverse magnetic wave propagating inside an elliptical degenerate plasma waveguide is analytically investigated by finding the field components of the TM{sub mr} mode in this waveguide. Besides, by solving the relativistic momentum and energy equations the deflection angle and the acceleration gradient of the electron in the waveguide are obtained. Furthermore, the field components of the hybrid mode and the transferred power in the presence of the magnetic field in this waveguide are found. Also by applying the boundary conditions at the plasma-conductor interface, we calculate the dispersion relation. It is shown that the cutoff frequency of this mode is dependent on the plasma density but independent of the magnetic field. Then, a single-electron model for numerical calculations of the electron deflection angle and acceleration gradient inside the magnetized plasma-filled elliptical waveguide is generally presented to be used as a cascading process for the acceleration purposes.

Abdoli-Arani, A.; Jazi, B. [Department of Photonics, Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Shokri, B. [Physics Department and Laser-Plasma Research Institute, G. C. Shahid Beheshti University, Tehran (Iran, Islamic Republic of)

2013-02-15T23:59:59.000Z

156

Transmission of severe acute respiratory syndrome in dynamical small-world networks Naoki Masuda and Norio Konno  

E-Print Network (OSTI)

such as antiviral drugs are not discovered yet, dynamical features of the epidemics should be clarified SARS is estimated to have started in the Guandong province of the People's Republic of China clarified, which mars developments of antiviral drugs or other means of conclusive medication. Under

Masuda, Naoki

157

Excited state structure, energy and electron transfer dynamics of photosynthetic reaction centers: A hole burning study  

SciTech Connect

The excited state structure, early time energy and electron transfer dynamics for bacterial photosynthetic reaction center of Rhodoseudomonas viridis, Rhodobacter sphaeroides and green plant photosynthetic reaction center of Photosystem 2 (PS 2) have been determined by hole burning spectroscopy. Transient hole burned spectra of the bacterial reaction centers reveal a special pair Franck-Condon marker mode progression with a superimposed zero phonon hole. Such progression is found to be absent in green plant Photosystem 2 which raises the question of structural similarities between the PS 2 and bacterial reaction centers. The excited state decay times are obtained for all systems and found to be consistent with time domain experiments. Similar temperature dependence of the decay kinetics have been observed for both bacterial and PS 2 reaction centers. Study of different preparations of reaction center of Photosystem 2 utilizing hole burning spectroscopy indicates that Triton X-100 detergent significantly affect the absorption and persistent hole burned spectra and disrupts the energy transfer from the accessory chlorophyll to the active pheophytin. The comparison between the bacterial reaction centers and Photosystem 2 has been presented and discussed in order to understand the difference in their early time dynamics and the excited state structure. A theoretical model has been developed based on the principle of linear electron-phonon coupling and imhomogeneous broadening. Our experimental results are found to be in good agreement with the theoretical calculations. 335 refs., 43 figs.

Tang, De-Ming.

1991-03-22T23:59:59.000Z

158

Electroluminescence and Transmission Electron Microscopy Characterization of Reverse-Biased AlGaN/GaN Devices  

Science Conference Proceedings (OSTI)

Reverse-bias stress testing has been applied to a large set of more than 50 AlGaN/GaN high electron mobility transistors, which were fabricated using the same process but with different values of the AlN mole fraction and the AlGaN barrier-layer thickness, as well as different substrates (SiC and sapphire). Two sets of devices having different defect types and densities, related to the different growth conditions and the choice of nucleation layer, were also compared. When subjected to gate drain (or gate-to-drain and source short-circuited) reverse-bias testing, all devices presented the same time-dependent failure mode, consisting of a significant increase in the gate leakage current. This failure mechanism occurred abruptly during step-stress experiments when a certain negative gate voltage, or critical voltage, was exceeded or, during constant voltage tests, at a certain time, defined as time to breakdown. Electroluminescence (EL) microscopy was systematically used to identify localized damaged areas that induced an increase of gate reverse current. This current increase was correlated with the increase of EL intensity, and significant EL emission during tests occurred only when the critical voltage was exceeded. Focused-ion-beam milling produced cross-sectional samples suitable for electron microscopy observation at the sites of failure points previously identified by EL microscopy. In highdefectivity devices, V-defects were identified that were associated with initially high gate leakage current and corresponding to EL spots already present in untreated devices. Conversely, identification of defects induced by reverse-bias testing proved to be extremely difficult, and only nanometer-size cracks or defect chains, extending vertically from the gate edges through the AlGaN/GaN heterojunction, were found. No signs of metal/semiconductor interdiffusion or extended defective areas were visible.

Cullen, David A [ORNL; Smith, David J [Arizona State University; Passaseo, Adriana [Consiglio Nazionale delle Ricerche; Tasco, Vittorianna [Consiglio Nazionale delle Ricerche; Stocco, Antonio [Universita di Padova; Meneghini, Matteo [Universita di Padova; Meneghesso, Gaudenzio [Universita di Padova; Zanoni, Enrico [Universita di Padova

2013-01-01T23:59:59.000Z

159

SunShot Initiative: Transmission Grid Integration  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission Grid Integration to Transmission Grid Integration to someone by E-mail Share SunShot Initiative: Transmission Grid Integration on Facebook Tweet about SunShot Initiative: Transmission Grid Integration on Twitter Bookmark SunShot Initiative: Transmission Grid Integration on Google Bookmark SunShot Initiative: Transmission Grid Integration on Delicious Rank SunShot Initiative: Transmission Grid Integration on Digg Find More places to share SunShot Initiative: Transmission Grid Integration on AddThis.com... Concentrating Solar Power Photovoltaics Systems Integration Research, Development, & Demonstration Distribution Grid Integration Transmission Grid Integration Solar Resource Assessment Technology Validation Power Electronics & Balance of System Hardware Technologies Competitive Awards

160

Modeling surfaces in the context of pulsed-power : work functions, electron emission and dynamic response.  

SciTech Connect

The ability to quickly understand and deal with issues on ZR, or to virtually design a future ZX accelerator, requires a physics-based capability to simulate all key pulsed power components. Highly important for gas switches and transmission lines are surface phenomena: thermionic emission, photoemission, field emission, and ion-surface dynamics. These are complex processes even at normal conditions, when coupled to the dynamic environment in pulsed power components, the current state of the art of understanding is not at the level of science based predictive modeling. Modeling efforts at the macroscopic level (finite element based hydrodynamic simulations) require detailed information of these processes to yield more reliable results. This is the final report of an LDRD project in the science of extreme environments investment area; the project was focused on describing the physics of surfaces of materials of interest in pulsed-power components. We have calculated the temperature dependence of work functions for metals from first principles using density functional theory (DFT) as well as investigated the effect of initial oxidation and alloying. By using the GW method, we have gone beyond DFT to calculate work functions for Al. The GW work required base-lining the GW results for different systems, since GW lacks a description of total energy. Lastly, we investigated the more macroscopic physics of how a surface and bulk material responds to a very high current under a short time, representative for current loads in pulsed-power components, with emphasis on materials modeling. These simulations were made using two hydrodynamic codes, ALEGRA and MACH2, in order to focus on the materials models themselves.

Cochrane, Kyle Robert (Ktech Corporation, Albuquerque, NM); Chantrenne, Sophie (SAIC, Albuquerque, NM); Mattsson, Thomas Kjell Rene; Faleev, Sergey V. (SNAMI Inc., AL)

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

WAVE TRANSMISSION AND MOORING-FORCE CHARACTERISTICS OF PIPE-TIRE FLOATING BREAKWATERS  

E-Print Network (OSTI)

Experimental Results Wave~Transmission Data Page a. PT-1Appendix C - Detailed Wave-Transmission Diagrams . 121 Listing dynamics and load-transmission characteristics. Goodyear

Harms, Volker W.

2013-01-01T23:59:59.000Z

162

Transmission barriers for bovine ovine, and human prions in transgenic mice  

E-Print Network (OSTI)

spongiform encephalopathy): transmission to the chimpanzee.G. A. H. Wells. 1996. Transmission dynamics and epidemiologyJ. -J. Hauw. 1996. BSE transmission to macaques. Nature 381:

Scott, Michael R; Peretz, David; Nguyen, Hoang-Oanh B; Dearmond, Stephen J; Prusiner, Stanley B

2005-01-01T23:59:59.000Z

163

The dynamics of 1D Bloch electrons in constant electric fields  

E-Print Network (OSTI)

We study the dynamics of a 1D Bloch electron subjected to a constant electric field. The periodic potential is supposed to be less singular than the $\\delta $-like potential (Dirac comb). We give a rigorous proof of Ao's result \\cite{Ao} that for a large class of initial conditions (high momentum regime) there is no localization in momentum space. The proof is based on the mathematical substantiation of the two simplifying assumptions made in physical literature: the transitions between far away bands can be neglected and the transitions at the quasi-crossing can be described by Landau-Zener like formulae. Using the connection between the above model and the driven quantum ring (DQR) shown by Avron and Nemirovski \\cite{AvN}, our results imply the increase of energy for weakly singular such DQR and appropiate initial conditions.

F. Bentosela; P. Duclos; G. Nenciu; V. Moldoveanu

2004-10-30T23:59:59.000Z

164

Dynamic environment coupling induce synchronized states in coupled time-delayed electronic circuits  

E-Print Network (OSTI)

We experimentally demonstrate the occurrence of various synchronized states in coupled piece-wise linear time-delayed electronic circuits using dynamic environment coupling where the environment has its own intrinsic dynamics via feedback from the circuits. We carry out these experiments in two different coupling configurations, namely mutual and subsystem coupling configurations. Depending upon the coupling strength and the nature of feedback, we observe a transition from nonsynchronization to complete synchronization via phase synchronization and from nonsynchronization to inverse synchronization via inverse-phase synchronization between the circuits in hyperchaotic regime. Snapshots of the time evolution, phase projection plots and localized sets of the circuits as observed experimentally from the oscilloscope, along with supporting numerical simulations confirm the existence of different synchronized states. Further, the transition to different synchronized states can be verified from the changes in the largest Lyapunov exponents, Correlation of Probability of Recurrence and Correlation Coefficient as a function of the coupling strength. We present a detailed linear stability analysis and obtain conditions for different synchronized states.

R. Suresh; K. Srinivasan; D. V. Senthilkumar; K. Murali; M. Lakshmanan; J. Kurths

2013-04-04T23:59:59.000Z

165

Single-Particle Dynamics in Electron Storage Rings with Extremely Low Emittance  

Science Conference Proceedings (OSTI)

Electron storage rings are widely used for high luminosity colliders, damping rings in high-energy linear colliders, and synchrotron light sources. They have become essential facilities to study high-energy physics and material and medical sciences. To further increase the luminosity of colliders or the brightness of synchrotron light sources, the beam emittance is being continually pushed downward, recently to the nanometer region. In the next decade, another order of reduction is expected. This requirement of ultra-low emittance presents many design challenges in beam dynamics, including better analysis of maps and improvement of dynamic apertures. To meet these challenges, we have refined transfer maps of common elements in storage rings and developed a new method to compute the resonance driving terms as they are built up along a beamline. The method is successfully applied to a design of PEP-X as a future light source with 100-pm emittance. As a result, we discovered many unexpected cancelations of the fourth-order resonance terms driven by sextupoles within an achromat.

Cai, Yunhai; /SLAC

2011-05-31T23:59:59.000Z

166

Transmission Planning  

NLE Websites -- All DOE Office Websites (Extended Search)

Planning Transmission Planning We accept requests from electric utilities, firm-power customers, private power developers, and independent power generators to interconnect...

167

The Development of HVDC Transmission System  

Science Conference Proceedings (OSTI)

The ever increasing process of high-voltage high-power fully controlled semiconductor technology has promoted the flexible ac transmission systems ahead significantly. Developments advance both the HVDC power transmission and the flexible ac transmission ... Keywords: converters station, HVDC transmission systems, power electronics

Yang Zhou; Dao Zhuojiang; Yu Fenwang

2012-07-01T23:59:59.000Z

168

Electron cyclotron resonance near the axis of the gas-dynamic trap  

SciTech Connect

Propagation of an extraordinary electromagnetic wave in the vicinity of electron cyclotron resonance surface in an open linear trap is studied analytically, taking into account inhomogeneity of the magnetic field in paraxial approximation. Ray trajectories are derived from a reduced dispersion equation that makes it possible to avoid the difficulty associated with a transition from large propagation angles to the case of strictly longitudinal propagation. Our approach is based on the theory, originally developed by Zvonkov and Timofeev [Sov. J. Plasma Phys. 14, 743 (1988)], who used the paraxial approximation for the magnetic field strength, but did not consider the slope of the magnetic field lines, which led to considerable error, as has been recently noted by Gospodchikov and Smolyakova [Plasma Phys. Rep. 37, 768-774 (2011)]. We have found ray trajectories in analytic form and demonstrated that the inhomogeneity of both the magnetic field strength and the field direction can qualitatively change the picture of wave propagation and significantly affect the efficiency of electron cyclotron heating of a plasma in a linear magnetic trap. Analysis of the ray trajectories has revealed a criterion for the resonance point on the axis of the trap to be an attractor for the ray trajectories. It is also shown that a family of ray trajectories can still reach the resonance point on the axis if the latter generally repels the ray trajectories. As an example, results of general theory are applied to the electron cyclotron resonance heating experiment which is under preparation on the gas dynamic trap in the Budker Institute of Nuclear Physics [Shalashov et al., Phys. Plasmas 19, 052503 (2012)].

Bagulov, D. S. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Kotelnikov, I. A. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences, Akademika Lavrentyeva Prospect 11, 630090 Novosibirsk (Russian Federation)

2012-08-15T23:59:59.000Z

169

Definition: Open Access Transmission Tariff | Open Energy Information  

Open Energy Info (EERE)

navigation, search Dictionary.png Open Access Transmission Tariff Electronic transmission tariff accepted by the U.S. Federal Energy Regulatory Commission requiring the...

170

Instrumentation and Beam Dynamics Study of Advanced Electron-Photon Facility in Indiana University  

SciTech Connect

The Advanced eLectron-PHoton fAcility (ALPHA) is a compact electron accelerator under construction and being commissioned at the Indiana University Center for Exploration of Energy and Matter (CEEM). In this thesis, we have studied the refurbished Cooler Injector Synchrotron (CIS) RF cavity using both the transmission line model and SUPERFISH simulation. Both low power and high power RF measurements have been carried out to characterize the cavity. Considering the performance limit of ferrite, we have designed a new ferrite loaded, co-axial quarter wave like cavity with similar structure but a more suitable ferrite material. We have also designed a traveling wave stripline kicker for fast extraction by POISSON and Microwave Studio. The strips geometry is trimmed to maximize the uniformity of the kicking field and match the impedance of the power cables. The time response simulation shows the kicker is fast enough for machine operation. The pulsed power supply requirement has also been specified. For the beam diagnosis in the longitudinal direction, we use a wideband Wall Gap Monitor (WGM) served in CIS. With proper shielding and amplification to get good WGM signal, we have characterized the injected and extracted beam signal in single pass commissioning, and also verified the debunching effect of the ALPHA storage ring. A modulation-demodulation signal processing method is developed to measure the current and longitudinal profile of injected beam. By scanning the dipole strength in the injection line, we have reconstructed the tomography of the longitudinal phase space of the LINAC beam. In the accumulation mode, ALPHA will be operated under a low energy and high current condition, where intra beam scattering (IBS) becomes a dominant effect on the beam emittance. A self consistent simulation, including IBS effect, gas scattering and linear coupling, has been carried out to calculate the emittance of the stored beam.

Luo, Tianhuan; /Indiana U.

2011-08-01T23:59:59.000Z

171

Electron-Backscattered Diffraction and Transmission Electron ...  

Science Conference Proceedings (OSTI)

Ones in which the kink boundaries – responsible for the MO – alternated in angle , or sign, forming a herring-bone like structure, and others in which they were all ...

172

Ultrafast probing of ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets  

SciTech Connect

The ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets are studied with time-resolved extreme ultraviolet ion imaging spectroscopy. At excitation energies of 23.6 {+-} 0.2 eV, Rydberg atoms in n= 3 and n= 4 states are ejected on different time scales and with significantly different kinetic energy distributions. Specifically, n= 3 Rydberg atoms are ejected with kinetic energies as high as 0.85 eV, but their appearance is delayed by approximately 200 fs. In contrast, n= 4 Rydberg atoms appear within the time resolution of the experiment with considerably lower kinetic energies. Major features in the Rydberg atom kinetic energy distributions for both principal quantum numbers can be described within a simple elastic scattering model of localized perturbed atomic Rydberg atoms that are expelled from the droplet due to their repulsive interaction with the surrounding helium bath. Time-dependent kinetic energy distributions of He{sub 2}{sup +} and He{sub 3}{sup +} ions are presented that support the formation of molecular ions in an indirect droplet ionization process and the ejection of neutral Rydberg dimers on a similar time scale as the n= 3 Rydberg atoms.

Buenermann, Oliver; Kornilov, Oleg; Neumark, Daniel M. [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Chemistry, University of California, Berkeley, California 94720 (United States); Haxton, Daniel J.; Gessner, Oliver [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Leone, Stephen R. [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Chemistry, University of California, Berkeley, California 94720 (United States); Department of Physics, University of California, Berkeley, California 94720 (United States)

2012-12-07T23:59:59.000Z

173

Presentations from ECLOUD10, the 49th ICFA Advanced Beam Dynamics Workshop on Electron Cloud Physics  

DOE Data Explorer (OSTI)

ECLOUD10, the 49h ICFA Advanced Beam Dynamics Workshop took place from October 8 to 12, 2010 at Cornell University, Ithaca, New York, USA. The development of the electron cloud (EC) in accelerator vacuum systems remains a significant issue for the operation of present and planned high intensity accelerators. The interaction of the cloud with the beam can lead to single and multi-bunch instabilities, emittance growth, and betatron tune shifts. The presence of the cloud in the beam chambers can result in a rapid rise in vacuum pressure, significant heat loads on cryogenic surfaces, and can interfere with beam diagnostics. Since the last ECLOUD workshop in 2007, an intense R&D effort has been underway to further understand the physics of the EC and to investigate new methods to mitigate the EC effects. The ECLOUD10 program focused on: a review of EC observations at existing machines; recent experimental efforts to characterize the EC (including EC diagnostics, experimental techniques, characterization of mitigation methods, and characterization of beam instabilities and emittance growth); the status of EC physics models and simulation codes and their comparison to recently acquired experimental data; and, the mitigation requirements and potential performance limitations imposed by the EC on upgraded and future machines. [copied with minor edits from http://www.lepp.cornell.edu/Events/ECLOUD10/] The agenda page makes slides, videos, and posters available to the public.

174

Transverse envelope dynamics of a 28.5 GeV electron beam in a long plasma  

SciTech Connect

The transverse dynamics of a 28.5 GeV electron beam propagating in a 1.4 m long, 0-2 x 10{sup 14} cm{sup -3} plasma are studied experimentally in the underdense or blow-out regime. The transverse component of the wake field excited by the short electron bunch focuses the bunch, which experiences multiple betatron oscillations as the plasma density is increased. The spot size variations are observed using optical transition radiation and Cherenkov radiation. In this regime, the behavior of the spot size as a function of the plasma density is well described by a simple beam envelope model. Dynamic changes of the beam envelope are observed by time resolving the Cherenkov light.

Clayton, C.E.; Blue, B.E.; Dodd, E.S.; Joshi, C.; Marsh, K.A.; Mori, W.B.; Wang, S.; Catravas, P.; Chattopadhyay, S.; Esarey, E.; Leemans, W.P.; Assmann, R.; Decker, F.J.; Hogan, M.J.; Iverson, R.; Raimondi, P.; Siemann, R.H.; Walz, D.; Katsouleas, T.; Lee, S.; Muggli, P.

2002-04-01T23:59:59.000Z

175

Bulk Power System Dynamics and Control -VI, August 22-27, 2004, Cortina d'Ampezzo, Italy Transmission Investment in Competitive Electricity Markets  

E-Print Network (OSTI)

Transmission Investment in Competitive Electricity Markets Javier Contreras George Gross E.T.S. de Ingenieros of the transmission network were in the hands of a single central entity. However, the unbundling of the electricity Industriales Department of Electrical and Computer Engineering Universidad de Castilla ­ La Mancha University

Gross, George

176

Foil Electron Multiplier  

NLE Websites -- All DOE Office Websites (Extended Search)

Multiplier Foil Electron Multiplier An apparatus for electron multiplication by transmission that is designed with at least one foil having a front side for receiving incident...

177

Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot  

SciTech Connect

The coherence time of an electron spin decohered by the nuclear spin environment in a quantum dot can be substantially increased by subjecting the electron to suitable dynamical decoupling sequences. We analyze the performance of high-level decoupling protocols by using a combination of analytical and exact numerical methods, and by paying special attention to the regimes of large interpulse delays and long-time dynamics, which are outside the reach of standard average Hamiltonian theory descriptions. We demonstrate that dynamical decoupling can remain efficient far beyond its formal domain of applicability, and find that a protocol exploiting concatenated design provides best performance for this system in the relevant parameter range. In situations where the initial electron state is known, protocols able to completely freeze decoherence at long times are constructed and characterized. The impact of system and control nonidealities is also assessed, including the effect of intrabath dipolar interaction, magnetic field bias and bath polarization, as well as systematic pulse imperfections. While small bias field and small bath polarization degrade the decoupling fidelity, enhanced performance and temporal modulation result from strong applied fields and high polarizations. Overall, we find that if the relative errors of the control pulse flip angles do not exceed 3%, decoupling protocols can still prolong the coherence time by up to 2 orders of magnitude.

Zhang, W.; Konstantinidis, N.; Dobrovitski, V.; Harmon, B.; Santos, L.; Viola, L.

2008-03-27T23:59:59.000Z

178

Stability of the strahl and solar burst electron distribution function and its dynamics  

Science Conference Proceedings (OSTI)

The so-called ''fan'' instability of the strahl electron distribution as well as of the plateau-like distribution of the solar burst electrons formed due to excitation of Langmuir waves is discussed. It is shown that this instability can be an effective mechanism of the pitch angle diffusion of these populations of electrons in the solar wind.

Shevchenko, V.; Galinsky, V. [University of California, San Diego, 9500 Gilman Drive, La Jolla CA 92093 (United States)

2012-05-21T23:59:59.000Z

179

Cooperation (Transmission  

E-Print Network (OSTI)

Pricing in Wireless Networks Peter Marbach Department of Computer Science University of Toronto #12; Model/Terminology A B #15; Routes are Fixed #15; C r : Capacity of Node r #15; U r (x r ): Utility Function of Node r 6 #12; Model/Terminology #15; x r : Transmission Rate of Node r #15; y r

Marbach, Peter

180

Transmission Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

electronically (shift-by-wire) and performed by a hydraulic system or electric motor. In addition, technologies can be employed to make the shifting process smoother than...

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Electron Dynamics and Symmetries at the Metal-Molecule Interface Probed by Two Photon Photoemission  

E-Print Network (OSTI)

c-60 organic photovoltaic cells. J.A.C.S. , 128:8108–8109, [electronic devices. In a photovoltaic cell, charge transfer

Muller, Eric Anton

2012-01-01T23:59:59.000Z

182

A Comparison of Electron-Transfer Dynamics inIonic Liquids and Neutral Solvents  

DOE Green Energy (OSTI)

The effect of ionic liquids on photoinduced electron-transfer reactions in a donor-bridge-acceptor system is examined for two ionic liquid solvents, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide and tributylmethylammonium bis(trifluoromethylsulfonyl)amide. The results are compared with those for the same system in methanol and acetonitrile solution. Electron-transfer rates were measured using time-resolved fluorescence quenching for the donor-bridge-acceptor system comprising a 1-N,1-N-dimethylbenzene-1,4-diamine donor, a proline bridge, and a coumarin 343 acceptor. The photoinduced electron-transfer processes are in the inverted regime (-{Delta}G > {lambda}) in all four solvents, with driving forces of -1.6 to -1.9 eV and estimated reorganization energies of about 1.0 eV. The observed electron-transfer kinetics have broadly distributed rates that are generally slower in the ionic liquids compared to the neutral solvents, which also have narrower rate distributions. To describe the broad distributions of electron-transfer kinetics, we use two different models: a distribution of exponential lifetimes and a discrete sum of exponential lifetimes. Analysis of the donor-acceptor electronic coupling shows that for ionic liquids this intramolecular electron-transfer reaction should be treated using a solvent-controlled electron-transfer model.

Wishart J. F.; Lee, H.Y.; Issa, J.B.; Isied, S.S.; Castner, Jr., E.W.; Pan, Y.; Hussey, C.L.; Lee, K.S.

2012-03-01T23:59:59.000Z

183

A joint x-ray and neutron study on amicyanin reveals the role of protein dynamics in electron transfer  

DOE Green Energy (OSTI)

The joint x-ray/neutron diffraction model of the Type I copper protein, amicyanin from Paracoccus denitrificans was determined at 1.8 {angstrom} resolution. The protein was crystallized using reagents prepared in D{sub 2}O. About 86% of the amide hydrogen atoms are either partially or fully exchanged, which correlates well with the atomic depth of the amide nitrogen atom and the secondary structure type, but with notable exceptions. Each of the four residues that provide copper ligands is partially deuterated. The model reveals the dynamic nature of the protein, especially around the copper-binding site. A detailed analysis of the presence of deuterated water molecules near the exchange sites indicates that amide hydrogen exchange is primarily due to the flexibility of the protein. Analysis of the electron transfer path through the protein shows that residues in that region are highly dynamic, as judged by hydrogen/deuterium exchange. This could increase the rate of electron transfer by transiently shortening through-space jumps in pathways or by increasing the atomic packing density. Analysis of C-H{hor_ellipsis}X bonding reveals previously undefined roles of these relatively weak H bonds, which, when present in sufficient number can collectively influence the structure, redox, and electron transfer properties of amicyanin.

Sukumar, N.; Mathews, F.S.; Langan, P.; Davidson, V.L. (Cornell); (UMMC); (WU-MED); (LANL)

2010-06-21T23:59:59.000Z

184

Dynamics of relativistic electrons propagating in a funnel-guided target  

Science Conference Proceedings (OSTI)

Hot electron transport in a funnel-guided target is investigated using two-dimensional hybrid simulations. Relativistic electrons generated by a petawatt picosecond short-pulse laser interacting with a gold slab are guided by a funnel to the compressed core region of the fuel. It is shown that as the energetic electrons propagate into the compressed core, the interface magnetic fields in the inner and outer surfaces of the funnel can change sign so that the fast electrons are efficiently guided in the gold funnel to reach the dense core. It is also shown that with funnel guiding, fuel heating is enhanced compared to that without the funnel. The findings here may be useful in the design of more efficient fast-ignition schemes, as well as in other applications involving transport and heating of energetic electrons in targets.

Zhou, C. T.; He, X. T. [Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China); Center for Applied Physics and Technology, Peking University, Beijing 100871 (China); Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China); Wang, X. G. [Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China); Ruan, S. C. [Shenzhen University, Shenzhen 518060 (China); Wu, S. Z. [Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China); Chew, L. Y. [Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Avenue, Singapore 639798 (Singapore); Yu, M. Y. [Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China); Institut fuer Theoretische Physik I, Ruhr-Universitaet Bochum, Bochum D-44780 (Germany)

2010-08-15T23:59:59.000Z

185

Airspace: Antarctic Sound Transmission  

E-Print Network (OSTI)

Antarctic Sound Transmission Andrea Polli Director,investigates how sound transmission can contribute to thePoles. How have such transmission-based projects developed

Polli, Andrea

2009-01-01T23:59:59.000Z

186

Transmission Investment: A Primer  

SciTech Connect

This primer highlights recent trends in transmission investment, summarizes the division of jurisdictional authority over transmission, and presents four alternative models for transmission ownership. (author)

McGarvey, Joe

2006-10-15T23:59:59.000Z

187

Adjustment of ablation shapes and subwavelength ripples based on electron dynamics control by designing femtosecond laser pulse trains  

SciTech Connect

A quantum model is proposed to investigate femtosecond laser pulse trains processing of dielectrics by including the plasma model with the consideration of laser particle-wave duality. Central wavelengths (400 nm and 800 nm) strongly impact the surface plasmon field distribution, the coupling field intensity distribution (between the absorbed intensity and the surface plasma), and the distribution of transient localized free electron density in the material. This, in turn, significantly changes the localized transient optical/thermal properties during laser materials processing. The effects of central wavelengths on ablation shapes and subwavelength ripples are discussed. The simulation results show that: (1) ablation shapes and the spacing of subwavelength ripples can be adjusted by localized transient electron dynamics control using femtosecond laser pulse trains; (2) the adjustment of the radii of ablation shapes is stronger than that of the periods of subwavelength ripples.

Yuan Yanping; Jiang Lan; Li Xin; Wang Cong [Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081 (China); Lu Yongfeng [Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0511 (United States)

2012-11-15T23:59:59.000Z

188

Aqueous systems from first-principles : structure, dynamics and electron-transfer reactions  

E-Print Network (OSTI)

In this thesis, we show for the first time how it is possible to calculated fully from first-principles the diabatic free-energy surfaces of electron-transfer reactions. The excitation energy corresponding to the transfer ...

Sit, Patrick Hoi Land

2006-01-01T23:59:59.000Z

189

Meta Modeling of Transmission Error for Spur, Helical and Planetary Gears for Wind Turbine Application.  

E-Print Network (OSTI)

??Detailed analysis of drive train dynamics requires accounting for the transmission error that arises in gears. However, the direct computation of the transmission error requires… (more)

Irfan, Muhammad

2013-01-01T23:59:59.000Z

190

Investigation of Multi-Frequency Power Transmission and System  

E-Print Network (OSTI)

This dissertation presents a new power system transmission concept based on frequency selectivity named Multi-Frequency Power System (MFPS). This system allows for selective power transmission among terminals in an interconnected system, and is enabled by power electronic technology. The dissertation starts with a presentation of some of the challenges faced by modern power systems, and includes a description of various power system technologies developed in an attempt to solve them. Then, our proposed solution is presented as an alternative to electric power transmission, and the fundamental concepts are explained. A version of the MFPS is developed, which has relevance to the problem of renewable sources integration. This AC DC Power System is further explored, and the topology of the system and the converters is presented, as well as the control techniques used in its operation. The dissertation also presents a performance study of the AC DC system, which was done in Simulink, and it demonstrates the robustness of the system under various dynamic and fault conditions. Finally, a summary of the work is given in the last section of the dissertation. The contributions of our research to the state of technology are discussed. These contributions include: the demonstration of power selectivity based on frequency identification, the development of a novel transmission system and a AC DC integrated implementation of it, and the development of a control and converter that enables selective power transmission. Also, some of the most relevant future research initiatives related to this topic are presented.

Barazarte Conte, Ronald

2011-08-01T23:59:59.000Z

191

Hawaii International Conference on System Sciences, January 3-6, 2001, Maui, Hawaii. 2001 IEEE Modeling Blackout Dynamics in Power Transmission Networks  

E-Print Network (OSTI)

dynamics of cascading overloads and outages. The model dynamics are demonstrated on the simple power system to the time series of historical data for North American power grid blackouts. The sandpile was not a model from the historical data for North American power grid blackouts. Here we describe the implementation

192

Electronic  

NLE Websites -- All DOE Office Websites (Extended Search)

contribution contribution to friction on GaAs: An atomic force microscope study Yabing Qi, 1,2 J. Y. Park, 2 B. L. M. Hendriksen, 2 D. F. Ogletree, 2 and M. Salmeron 2,3 1 Applied Science and Technology Graduate Group, University of California, Berkeley, California 94720, USA 2 Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA 3 Department of Materials Sciences and Engineering, University of California, Berkeley, California 94720, USA ͑Received 23 January 2008; revised manuscript received 11 April 2008; published 7 May 2008͒ The electronic contribution to friction at semiconductor surfaces was investigated by using a Pt-coated tip with 50 nm radius in an atomic force microscope sliding against an n-type GaAs͑100͒ substrate. The GaAs surface was covered by an approximately 1 nm thick oxide layer. Charge accumulation

193

Advanced experimental applications for x-ray transmission gratings spectroscopy using a novel grating fabrication method  

Science Conference Proceedings (OSTI)

A novel fabrication method for soft x-ray transmission grating and other optical elements is presented. The method uses focused-ion-beam technology to fabricate high-quality free standing grating bars on transmission electron microscopy grids. High quality transmission gratings are obtained with superb accuracy and versatility. Using these gratings and back-illuminated CCD camera, absolutely calibrated x-ray spectra can be acquired for soft x-ray source diagnostics in the 100-3000 eV spectral range. Double grating combinations of identical or different parameters are easily fabricated, allowing advanced one-shot application of transmission grating spectroscopy. These applications include spectroscopy with different spectral resolutions, bandwidths, dynamic ranges, and may serve for identification of high-order contribution, and spectral calibrations of various x-ray optical elements.

Hurvitz, G.; Ehrlich, Y.; Shpilman, Z.; Levy, I.; Fraenkel, M. [Plasma Physics Department, Applied Physics Division, Soreq NRC, Yavne (Israel); Strum, G. [Solid State Department, Applied Physics Division, Soreq NRC, Yavne (Israel)

2012-08-15T23:59:59.000Z

194

Transmission | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Transmission Transmission Below are resources for Tribes on transmission. Transmission 101 Presentation from the National Council on Electricity Policy's Transmissions Technologies workshop. Includes information on transmission technology, costs, and how to plan the system. Transmission on Tribal Land Basics The Tribal Energy and Environmental Information Clearinghouse provides resources for development on tribal lands. Topics covered include transmission technology basics, potential impacts, law and regulations, and tribal incentives. Transmission Pre-Feasibility Study for Tribes Presentation on the components of a pre-feasibility study including generation location, sizing, and desirability, ability and cost to deliver, capacity versus energy, time of delivery versus peak, request for

195

Hydromechanical transmission  

DOE Patents (OSTI)

A power transmission having three planetary assemblies, each having its own carrier and its own planet, sun, and ring gears. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the three sun gears, all of which are connected together. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being connected in driving relation to the input shaft, the other unit, which may have a fixed stroke, being connected in driving relation to the sun gears. The input shaft also drives the carrier of the third planetary assembly. A brake grounds the first carrier in the first range and in reverse and causes drive to be delivered to the output through the first ring gear in a hydrostatic mode. The carrier of the third planetary assembly drives the ring gear of the second planetary assembly, and a first clutching means connects the second carrier with the output in a second range, the brake for grounding the first carrier then being released. A second clutching means enables the third ring gear to drive the output shaft in a third range.

Orshansky, Jr. deceased, Elias (LATE OF San Francisco, CA); Weseloh, William E. (San Diego, CA)

1978-01-01T23:59:59.000Z

196

EXPERIENCE IN REDUCING ELECTRON CLOUD AND DYNAMIC PRESSURE RISE IN WARM AND COLD REGIONS IN RHIC.  

SciTech Connect

The large scale application of non-evaporable getter coating in RHIC has been effective in reducing the electron cloud. Since beams with higher intensity and smaller bunch spacing became possible in operation, the emittance growth is of concern. Study results are reported together with experiences of machine improvements: saturated NEG coatings, anti-grazing ridges in warm sections, and the pre-pumping in cryogenic regions.

ZHANG, S.Y.; AHRENS,L.; ALLESI, J.; BAI, M.; BLASKIEWICZ, M.; CAMERON, P.; CONNOLLY, R.; DREES, A.; FISCHER, W.; GULLOTTA, J.; HE, P.; HSEUH, H.C.; HUANG, H.; LEE, R.; LITVINENKO, V.; MACKAY, W.W.; MONTAG, C.; NICOLETTI, A.; OERTER, B.; PILAT, F.; PTITSYN, V.; ROSER, T.; SATOGATA, T.; SMART, L.; SYNDSTRUP, L.; TEPIKIAN, S.; THIEBERGER, P.; TRBOJEVIC, D.; WEI, J.; ZENO, K.

2006-06-23T23:59:59.000Z

197

Photoluminescence Blinking Dynamics of Colloidal Quantum Dots in the Presence of Controlled External Electron Traps  

Science Conference Proceedings (OSTI)

The effect of the external charge trap on the photoluminescence blinking dynamics of individual colloidal quantum dots is investigated with a series of colloidal quantum dot-bridge-fullerene dimers with varying bridge lengths, where the fullerene moiety acts as a well-defined, well-positioned external charge trap. It is found that charge transfer followed by charge recombination is an important mechanism in determining the blinking behavior of quantum dots when the external trap is properly coupled with the excited state of the quantum dot, leading to a quasi-continuous distribution of 'on' states and an early fall-off from a power-law distribution for both 'on' and 'off' times associated with quantum dot photoluminescence blinking.

Cotlet, M.; Xu, Z.

2012-01-23T23:59:59.000Z

198

Time-resolved THz studies of carrier dynamics in semiconductors, superconductors, and strongly-correlated electron materials  

Science Conference Proceedings (OSTI)

Perhaps the most important aspect of contemporary condensed matter physics involves understanding strong Coulomb interactions between the large number of electrons in a solid. Electronic correlations lead to the emergence of new system properties, such as metal-insulator transitions, superconductivity, magneto-resistance, Bose-Einstein condensation, the formation of excitonic gases, or the integer and fractional Quantum Hall effects. The discovery of high-Tc superconductivity in particular was a watershed event, leading to dramatic experimental and theoretical advances in the field of correlated-electron systems. Such materials often exhibit competition between the charge, lattice, spin, and orbital degrees of freedom, whose cause-effect relationships are difficult to ascertain. Experimental insight into the properties of solids is traditionally obtained by time-averaged probes, which measure e.g., linear optical spectra, electrical conduction properties, or the occupied band structure in thermal equilibrium. Many novel physical properties arise from excitations out of the ground state into energetically higher states by thermal, optical, or electrical means. This leads to fundamental interactions between the system's constituents, such as electron-phonon and electron-electron interactions, which occur on ultrafast timescales. While these interactions underlie the physical properties of solids, they are often only indirectly inferred from time-averaged measurements. Time-resolved spectroscopy, consequently, is playing an ever increasing role to provide insight into light-matter interaction, microscopic processes, or cause-effect relationships that determine the physics of complex materials. In the past, experiments using visible and near-infrared femtosecond pulses have been extensively employed, e.g. to follow relaxation and dephasing processes in metals and semiconductors. However, many basic excitations in strongly-correlated electron systems and nanoscale materials occur at lower energies. The terahertz (THz) regime is particularly rich in such fundamental resonances. This includes ubiquitous lattice vibrations and low-energy collective oscillations of conduction charges. In nanoscale materials, band structure quantization also yields novel infrared and THz transitions, including intersubband absorption in quantum wells. The formation of excitons in turn leads to low-energy excitations analogous to inter-level transitions in atoms. In transition-metal oxides, fundamental excitation gaps arise from charge pairing into superconducting condensates and other correlated states. This motivates the use of ultrafast THz spectroscopy as a powerful tool to study light-matter interactions and microscopic processes in nanoscale and correlated-electron materials.A distinct advantage of coherent THz pulses is that the amplitude and phase of the electric field can be measured directly, as the THz fields are coherent with the fs pulses from which they are generated. Using THz time-domain spectroscopy (THz-TDS), both the real and imaginary parts of the response functions (such as the dielectric function) are obtained directly without the need for Kramers?Kronig transforms. The THz response can also be expressed in terms of absorption and refractive index, or as the optical conductivity. The optical conductivity describes the current response of a many-body system to an electric field, an ideal tool to study conducting systems. A second important advantage is the ultrafast time resolution that results from the short temporal duration of the THz time-domain sources. In particular, optical-pump THz-probe spectroscopy enables a delicate probe of the transient THz conductivity after optical photoexcitation. These experiments can provide insight into quasiparticle interactions, phase transitions, or nonequilibrium dynamics. In this chapter we will provide many such examples. Since THz spectroscopy of solids is a quickly expanding field

Kaindl, Robert A.; Averitt, Richard D.

2006-11-14T23:59:59.000Z

199

In Situ Transmission Electron Microscopy Observation of Microstructure and Phase Evolution in a SnO2 Nanowire during Lithium Intercalation  

SciTech Connect

This paper reports development of a lithium-ion battery nanostructure device using a single nanowire for in-stu TEM study of the battery. This prototype lithium ion battery was built using a single SnO? nanowire as the anode, an air stable salt: lithium bis(trifluoromethansulfonyl) imide (LiTFSI) in a hydrophobic ionic liquid: 1-butyl-1-methylpyrrolidium TFSI (P14TFSI) as the electrolyte, and LiCoO? as the cathode. The microstructure evolution of the single nanowire anode was studied using TEM imaging, electron diffraction, and electron energy-loss spectroscopy during the operation of the battery. It has been observed that during initial charging, the electrolyte was found to decompose and subsequently be electrodeposited on the anode, leading to the formation of a coating layer on the anode. This coating layer was enriched with Li. Formation of this layer will retard the Li intercalation of SnO?. This in situ TEM observation provides direct evidence that accounts for the observed low capacity and fast fading of the Li battery when LiTFSI-P14TFSI is used as the electrolyte.

Wang, Chong M.; Xu, Wu; Liu, Jun; Zhang, Jiguang; Saraf, Laxmikant V.; Arey, Bruce W.; Choi, Daiwon; Yang, Zhenguo; Xiao, Jie; Thevuthasan, Suntharampillai; Baer, Donald R.

2011-04-08T23:59:59.000Z

200

Survey of Transmission Cost Allocation Methodologies for Regional Transmission Organizations  

Science Conference Proceedings (OSTI)

The report presents transmission cost allocation methodologies for reliability transmission projects, generation interconnection, and economic transmission projects for all Regional Transmission Organizations.

Fink, S.; Porter, K.; Mudd, C.; Rogers, J.

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Regulations for Electric Transmission and Fuel Gas Transmission...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Transmission and Fuel Gas Transmission Lines Ten or More Miles Long (New York) Regulations for Electric Transmission and Fuel Gas Transmission Lines Ten or More Miles Long...

202

Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydration Hydration Water on Rutile Studied by Backscattering Neutron Spectroscopy and Molecular Dynamics Simulation E. Mamontov,* ,† D. J. Wesolowski, ‡ L. Vlcek, § P. T. Cummings, §,| J. Rosenqvist, ‡ W. Wang, ⊥ and D. R. Cole ‡ Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6473, Chemical Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, Department of Chemical Engineering, Vanderbilt UniVersity, NashVille, Tennessee 37235-1604, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6496, and EnVironmental Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036 ReceiVed: December 20, 2007; ReVised Manuscript ReceiVed: June 4, 2008 The high energy resolution, coupled with the wide dynamic range, of the new backscattering

203

DOE Transmission Workshop  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Workshop November 1, 2012 Federal Energy Regulatory Commission Commissioner Cheryl LaFleur 1 FERC's Transmission Efforts Reliability and Grid Security Planning...

204

Transmission | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Usage Transmission Transmission Once electricity is generated -- whether by burning fossil fuels; through nuclear fission; or by harnessing wind, solar, geothermal, or hydro...

205

Merchant transmission investment  

E-Print Network (OSTI)

We examine the performance attributes of a merchant transmission investment framework that relies on "market driven" transmission investment to provide the infrastructure to support competitive wholesale markets for ...

Joskow, Paul L.

2003-01-01T23:59:59.000Z

206

Adaptive control of hydraulic shift actuation in an automatic transmission  

E-Print Network (OSTI)

A low-order dynamic model of a clutch for hydraulic control in an automatic transmission is developed by separating dynamics of the shift into four regions based on clutch piston position. The first three regions of the ...

Thornton, Sarah Marie

2013-01-01T23:59:59.000Z

207

Atomic Cu/Nb Interface Structures Characterized by Transmission ...  

Science Conference Proceedings (OSTI)

To understand the interface effect on mechanical behavior, atomic Cu/Nb interface structures were studied by (scanning) transmission electron microscopy  ...

208

Molecular dynamics simulation of electron transfer in proteins. Theory and application to Q sub A yields Q sub B transfer in the photosynthetic reaction center  

Science Conference Proceedings (OSTI)

Electron transfer (ET) from the primary menaquinone Q{sub A} to the secondary ubiquinone Q{sub B}, i.e., Q{sub A}{sup {minus}}Q{sub B} {yields} Q{sub A}Q{sub B}{sup {minus}}, in the photosynthetic reaction center of Rhodopseudomonas viridis has been simulated by using the method of molecular dynamics accounting for the classical motion of a protein's nuclear degrees of freedom, the redistribution of charge accompanying electron transfer being described quantum chemically. We outline the role of classical nuclear degrees of freedom in electron transfer, identifying the essential dynamic properties that should be determined from molecular dynamics simulations in order to characterize electron transfer. These quantities, all related to the energy difference {Delta}E(t) = E{sub p}(t) - E{sub R}O(t) of virtual forward (electron tries to jump forward before ET) and backward (electron tries to jump backward after ET) electron transfer, R and P denoting the states Q{sub A}{sup {minus}}Q{sub B} and Q{sub A}Q{sub B}{sup {minus}}, respectively, are as follows: the variance of {Delta}E(t) and the average value of {Delta}E(t) before and after transfer, i.e., {Sigma}{sub R} (6.9 kcal/mol), {sub R} (22 kcal/mol) and {Sigma}{sub p} (8.8 kcal/mol), {sub p} ({minus}25 kcal/mol), respectively; the relaxation time of the energy-energy correlation function {sub R})({Delta}E(0) - {sub R})>{sub R} (120 fs); the time describing the relaxation of {Delta}E(t) from an average value {sub R} to an average value {sub p} immediately after electron transfer (200 fs). The quantities in brackets are the respective simulation results.

Nonella, M.; Schulten, K. (Univ. of Illinois, Urbana (USA))

1991-03-07T23:59:59.000Z

209

First tests of THz transmission through a Diamond Anvil Cell  

Science Conference Proceedings (OSTI)

The THz source generated by the accelerator driver for the Jefferson Lab Free Electron Laser is unique in the world in its ability to deliver a high average power beam of ultrashort (energy phenomena, and the time structure enables measurement of dynamic processes with sub-ps resolution. An outline of the range of potential applications for this THz source as a probe of sub-ps dynamics in materials under extreme conditions will be presented. To demonstrate the capabilities of this source for just such experiments, the first set of tests to characterize the transmission of the THz beam through a diamond anvil cell (DAC) have been performed. These preliminary results will be presented along with a description of the optical design used to deliver the THz beam into and out of the DAC. The current design will be compared with other possible techniques and the plans for the next set of measurements will also be given.

John Klopf

2011-01-24T23:59:59.000Z

210

Effect of pulse error accumulation on dynamical decoupling of the electron spins of phosphorus donors in silicon  

E-Print Network (OSTI)

Dynamical decoupling (DD) is an efficient tool for preserving quantum coherence in solid-state spin systems. However, the imperfections of real pulses can ruin the performance of long DD sequences. We investigate the accumulation and compensation of different pulse errors in DD using the electron spins of phosphorus donors in silicon as a test system. We study periodic DD sequences (PDD) based on spin rotations about two perpendicular axes, and their concatenated and symmetrized versions. We show that pulse errors may quickly destroy some spin states, but maintain other states with high fidelity over long times. Pulse sequences based on spin rotations about $x$ and $y$ axes outperform those based on $x$ and $z$ axes due to the accumulation of pulse errors. Concatenation provides an efficient way to suppress the impact of pulse errors, and can maintain high fidelity for all spin components: pulse errors do not accumulate (to first order) as the concatenation level increases, despite the exponential increase in the number of pulses. Our theoretical model gives a clear qualitative picture of the error accumulation, and produces results in quantitative agreement with the experiments.

Zhi-Hui Wang; Wenxian Zhang; A. M. Tyryshkin; S. A. Lyon; J. W. Ager; E. E. Haller; V. V. Dobrovitski

2010-11-29T23:59:59.000Z

211

Independent transmission company (ITC) and markets for transmission  

E-Print Network (OSTI)

Independent Abstract-- transmission company (ITC) and markets for transmission Yong T. Yoon Marija a fundamental structure for the transmission provider (TP) composed of the independent transmission company (ITC out the associated functions including managing transmission congestion. At the minimum

Ilic, Marija D.

212

Three essays concerning information transmission  

E-Print Network (OSTI)

Transmissionas an Information-Transmission Mechanism,” American EconomicConcerning Information Transmission A dissertation submitted

Boone, Johnathan

2010-01-01T23:59:59.000Z

213

Characterization of Planar Transmission Lines  

Science Conference Proceedings (OSTI)

... References on: On-Wafer Measurement and Calibration, Planar Transmission Line Characterization and Multiconductor Transmission Lines. ...

2011-12-15T23:59:59.000Z

214

San Luis Transmission Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Luis Transmission Project EIS/EIR Luis Transmission Project EIS/EIR San Luis Transmission Project EIS/EIR Western proposes to construct, own, operate, and maintain a new 230-kilovolt transmission line about 62 miles in length between Western's Tracy Substation and Western's San Luis Substation and a new 70-kV transmission line about 5 miles in length between the San Luis and O'Neill Substations. Western also will consider other transmission construction options including: A new 500-kV transmission line about 62 miles in length operated at 230-kV between Western's Tracy and San Luis Substations; A new 500-kV transmission line operated at 500-kV about 62 miles in length between the Tracy Substation and Pacific Gas and Electric's Los Banos Substation; and A new 230-kV transmission line about 18 miles in length between San Luis Substation and Dos Amigos Substation.

215

National Transmission Grid Study  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Grid Study Grid Study U.S. Department of Energy The Honorable Spencer Abraham Secretary of Energy May 2002 ii National Transmission Grid Study National Transmission Grid Study i ii National Transmission Grid Study National Transmission Grid Study iii How This Study Was Conducted The National Energy Policy Plan directed the U.S. Department of Energy (DOE) to conduct a study to examine the benefits of establishing a national electricity transmission grid and to identify transmission bottlenecks and measures to address them. DOE began by conducting an independent analysis of U.S. electricity markets and identifying transmission system bottlenecks using DOE's Policy Office Electricity Modeling System (POEMS). DOE's analysis, presented in Section 2, confirms the central role of the nation's transmission

216

Transmission | Open Energy Information  

Open Energy Info (EERE)

Gateway Gateway Edit History Facebook icon Twitter icon » Transmission (Redirected from Transmission) Jump to: navigation, search Transmission header.png Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Lattice.jpg High-voltage transmission lines form the backbone of electricity systems. Transmission lines are designed to carry large amounts of electricity at high voltages, typically 115 to 500 kilovolts (kV), across long distances. Networks of transmission lines transfer electricity from power plants or other interconnections to substations. At substations, the high-voltage electricity is "stepped down" to a lower voltage, which can be carried

217

Arnold Schwarzenegger TRANSMISSION BENEFIT  

E-Print Network (OSTI)

California Edison's (SCE) initial Tehachapi transmission trunk-line proposal for integration of wind. The Tehachapi Transmission Project to integrate 4,500 MW of renewable wind energy has since been approved after

218

Electronic Methods Potentially Secure for Sending Blank ...  

Science Conference Proceedings (OSTI)

... discusses how postal mail and four electronic transmission options (telephone ... as cryptography and back up communications lines, depending on ...

2011-08-10T23:59:59.000Z

219

Transmission Investment Incentives  

Science Conference Proceedings (OSTI)

This report documents the use of agent-based simulation as a tool for studying transmission investment incentives, and it is meant to illuminate what accounts for the difficulties in aligning incentives for enhancing the transmission system. The report suggests that a new method of calculation for bid optimization be applied to the economic analysis of long-term incentives for transmission investment. This technology can be broadly applied to help negotiators in transmission planning quantify their count...

2006-12-21T23:59:59.000Z

220

Concurrent Wind Cooling in Power Transmission Lines  

SciTech Connect

Idaho National Laboratory and the Idaho Power Company, with collaboration from Idaho State University, have been working on a project to monitor wind and other environmental data parameters along certain electrical transmission corridors. The combination of both real-time historical weather and environmental data is being used to model, validate, and recommend possibilities for dynamic operations of the transmission lines for power and energy carrying capacity. The planned results can also be used to influence decisions about proposed design criteria for or upgrades to certain sections of the transmission lines.

Jake P Gentle

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

STRATEGIC TRANSMISSION INVESTMENT PLAN  

E-Print Network (OSTI)

cable transmission systems:5 two 500 kV circuits, a high-voltage direct current (HVDC) system and two to serve VI and the HVDC link is expected to be completely retired in 2007. This erosion in transmission / replacement of the HVDC cables (at a cost of $230 million), as well as transmission upgrades on the mainland

222

ABSTRACT: Electron Irradiation Induced Transformation of ... - TMS  

Science Conference Proceedings (OSTI)

Jun 27, 2007 ... Crystallochemical changes of (Pb5Ca5)(VO4)6F2 apatite under electron irradiation were examined by transmission electron microscopy.

223

Are Electron Tweezers Possible? Apparently So.  

Science Conference Proceedings (OSTI)

... metallurgist Vladimir Oleshko, you might expect that a beam of focused electrons—such as that created by a transmission electron microscope (TEM ...

2012-10-02T23:59:59.000Z

224

Transmission Electron Microscopy Studies on Lithium Battery ...  

Science Conference Proceedings (OSTI)

Microstructural Evolution of SnS Thin Films Grown by Electrodeposition · Morphology Engineering of 1D, 2D and 3D TiO2 Nanostructures and Their Application ...

225

Aberration-Corrected Scanning Transmission Electron Microscopy ...  

Science Conference Proceedings (OSTI)

... hydrogen production by steam reforming of methanol and oxidation of CO for low ... Recent Developments in In Situ Studies of Catalytic Materials at Atomic ...

226

Transmission Line Surge Arrester - White Paper  

Science Conference Proceedings (OSTI)

Electricity customers are continually demanding improved transmission system reliability and performance. In order to improve reliability, utilities must focus on mitigating the effects of lightning, which is often the most frequent cause of transmission outages and service interruptions. The widespread use of electronic equipment at home and at work makes the challenge of providing reliable electrical service greater today than ever before. Customers can be adversely affected by even momentary outages o...

2005-07-27T23:59:59.000Z

227

Automated manual transmission controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI); Reed, Jr., Richard G. (Royal Oak, MI); Bernier, David R. (Rochester Hills, MI)

1999-12-28T23:59:59.000Z

228

Transmission | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Gateway Edit History Facebook icon Twitter icon » Transmission Jump to: navigation, search Transmission header.png Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Lattice.jpg High-voltage transmission lines form the backbone of electricity systems. Transmission lines are designed to carry large amounts of electricity at high voltages, typically 115 to 500 kilovolts (kV), across long distances. Networks of transmission lines transfer electricity from power plants or other interconnections to substations. At substations, the high-voltage

229

Definition: Transmission Service Provider | Open Energy Information  

Open Energy Info (EERE)

Transmission Service Provider The entity that administers the transmission tariff and provides Transmission Service to Transmission Customers under applicable...

230

Transmission SEAB Presentation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission SEAB Presentation Transmission SEAB Presentation Transmission SEAB Presentation More Documents & Publications 2013 Transmission Reliability Program Peer Review - Day 1...

231

EC Transmission Line Materials  

SciTech Connect

The purpose of this document is to identify materials acceptable for use in the US ITER Project Office (USIPO)-supplied components for the ITER Electron cyclotron Heating and Current Drive (ECH&CD) transmission lines (TL), PBS-52. The source of material property information for design analysis shall be either the applicable structural code or the ITER Material Properties Handbook. In the case of conflict, the ITER Material Properties Handbook shall take precedence. Materials selection, and use, shall follow the guidelines established in the Materials Assessment Report (MAR). Materials exposed to vacuum shall conform to the ITER Vacuum Handbook. [Ref. 2] Commercial materials shall conform to the applicable standard (e.g., ASTM, JIS, DIN) for the definition of their grade, physical, chemical and electrical properties and related testing. All materials for which a suitable certification from the supplier is not available shall be tested to determine the relevant properties, as part of the procurement. A complete traceability of all the materials including welding materials shall be provided. Halogenated materials (example: insulating materials) shall be forbidden in areas served by the detritiation systems. Exceptions must be approved by the Tritium System and Safety Section Responsible Officers.

Bigelow, Tim S [ORNL

2012-05-01T23:59:59.000Z

232

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. XX, NO. XX, FEBRUARY 2013 1 The Optimized String Dynamic Photovoltaic Array  

E-Print Network (OSTI)

Dynamic Photovoltaic Array Jonathan Storey, Peter R. Wilson, Senior Member, IEEE, and Darren Bagnall Abstract--This paper presents a novel system for producing the optimum power output from photovoltaic arrays using dynamic cell reconfiguration. The proposed approach is the first in the literature

233

Simulation of dynamics of radiation belt electrons during geomagnetic storms driven by high speed solar wind streams.  

E-Print Network (OSTI)

??Satellite observations have shown that fluxes of relativistic electrons in the earth's radiation belts can vary by orders of magnitude during periods of high solar… (more)

Yu, Bin

2007-01-01T23:59:59.000Z

234

NIST Photovoltaic carrier dynamics  

Science Conference Proceedings (OSTI)

... carrier dynamics in novel electronic photovoltaic materials being considered and developed for future solar cell and energy capture applications. ...

2013-04-01T23:59:59.000Z

235

Series Transmission Line Transformer  

DOE Patents (OSTI)

A series transmission line transformer is set forth which includes two or more of impedance matched sets of at least two transmissions lines such as shielded cables, connected in parallel at one end ans series at the other in a cascading fashion. The cables are wound about a magnetic core. The series transmission line transformer (STLT) which can provide for higher impedance ratios and bandwidths, which is scalable, and which is of simpler design and construction.

Buckles, Robert A. (Livermore, CA); Booth, Rex (Livermore, CA); Yen, Boris T. (El Cerrito, CA)

2004-06-29T23:59:59.000Z

236

Effect of self-magnetic fields on the nonlinear dynamics of relativistic electron beam with virtual cathode  

Science Conference Proceedings (OSTI)

The report is devoted to the results of the numerical study of the virtual cathode (VC) formation conditions in the relativistic electron beam (REB) under the influence of the self-magnetic and external axial magnetic fields. The azimuthal instability of the relativistic electron beam leading to the formation of the vortex electron structure in the system was found out. This instability is determined by the influence of the self-magnetic fields of the relativistic electron beam, and it leads to the decrease of the critical value of the electron beam current (current when the non-stationary virtual cathode is formed in the drift space). The typical dependencies of the critical current on the external uniform magnetic field value were discovered. The effect of the beam thickness on the virtual cathode formation conditions was also analyzed.

Hramov, A. E.; Koronovskii, A. A. [Saratov State University, Astrakhanskaja 83, Saratov 410012, Russia Saratov State Technical University, Politechnicheskaja 77, Saratov 410028 (Russian Federation); Kurkin, S. A. [Saratov State University, Astrakhanskaja 83, Saratov 410012 (Russian Federation); Filatova, A. E. [Saratov State Technical University, Politechnicheskaja 77, Saratov 410028 (Russian Federation)

2012-11-15T23:59:59.000Z

237

Video Transmission Jerkiness Measure.  

E-Print Network (OSTI)

??Digital video transmission is widely used nowadays in multimedia. Frame dropping, freeze and reduced number of frames in the transmitted video are common symptoms of… (more)

Abdelsamad, Deena

2013-01-01T23:59:59.000Z

238

Patterns of transmission investment  

E-Print Network (OSTI)

This paper examines a number of issues associated with alternative analytical approaches for evaluating investments in electricity transmission infrastructure and alternative institutional arrangements to govern network ...

Joskow, Paul L.

2005-01-01T23:59:59.000Z

239

Design of a superconducting linear accelerator for an Infrared Free Electron Laser of the proposed Chemical Dynamics Research Laboratory at LBL  

Science Conference Proceedings (OSTI)

An accelerator complex has recently been designed at LBL as part of an Infrared Free Electron Laser facility in support of a proposed Chemical Dynamics Research Laboratory. We will outline the choice of parameters and design philosophy, which are strongly driven by the demand of reliable and spectrally stable operation of the FEL for very special scientific experiments. The design is based on a 500 MHz recirculating superconducting electron linac with highest energy reach of about 60 MeV. The accelerator is injected with beams prepared by a specially designed gun-buncher system and incorporates a near-isochronous and achromatic recirculation line tunable over a wide range of beam energies. The stability issues considered to arrive at the specific design will be outlined.

Chattopadhyay, S.; Byrns, R.; Donahue, R.; Edighoffer, J.; Gough, R.; Hoyer, E.; Kim, K.J.; Leemans, W.; Staples, J.; Taylor, B.; Xie, M.

1992-08-01T23:59:59.000Z

240

Electron Tomography in Aberration-corrected Transmission Electron ...  

Science Conference Proceedings (OSTI)

P1-04: 3D Microstructural Characterization of Uranium Oxide as a Surrogate Nuclear ... P1-15: Gating System Optimisation Design Study of a Cast Automobile ... P2-27: Characterization of Carbonate Rocks through X-ray Microtomography.

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Moments of the transmission eigenvalues, proper delay times and random matrix theory I  

E-Print Network (OSTI)

We develop a method to compute the moments of the eigenvalue densities of matrices in the Gaussian, Laguerre and Jacobi ensembles for all the symmetry classes beta = 1,2, 4 and finite matrix dimension n. The moments of the Jacobi ensembles have a physical interpretation as the moments of the transmission eigenvalues of an electron through a quantum dot with chaotic dynamics. For the Laguerre ensemble we also evaluate the finite n negative moments. Physically, they correspond to the moments of the proper delay times, which are the eigenvalues of the Wigner-Smith matrix. Our formulae are well suited to an asymptotic analysis as n -> infinity.

F. Mezzadri; N. J. Simm

2011-03-31T23:59:59.000Z

242

The progressive transmission disadvantage  

Science Conference Proceedings (OSTI)

The disadvantage of progressive transmission, compared to transmission in a single step, is analyzed for the high-rate case using a polytope that is self-similar under binary subdivision. This disadvantage is calculated to be 0.3424 dB or 0.057 bit compared ...

M. J. Durst

1997-01-01T23:59:59.000Z

243

Magnetically insulated transmission line oscillator  

DOE Patents (OSTI)

A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities therebetween, and a gap is formed between the anode and a cathode of the oscillator. In response to a pulsed voltage applied to the anode and cathode, self-generated magnetic fields arfe produced in a cross-field orientation with respect to the orientation of the electric field between the anode and the cathode. The cross-field magnetic fields insulate the flow of electrons in the gap and confine the flow of electrons within the gap.

Bacon, Larry D. (Albuquerque, NM); Ballard, William P. (Albuquerque, NM); Clark, M. Collins (Albuquerque, NM); Marder, Barry M. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

244

Magnetically insulated transmission line oscillator  

DOE Patents (OSTI)

A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities therebetween, and a gap is formed between the anode and a cathode of the oscillator. In response to a pulsed voltage applied to the anode and cathode, self-generated magnetic fields are produced in a cross-field orientation with respect to the orientation of the electric field between the anode and the cathode. The cross-field magnetic fields insulate the flow of electrons in the gap and confine the flow of electrons within the gap. 11 figs.

Bacon, L.D.; Ballard, W.P.; Clark, M.C.; Marder, B.M.

1987-05-19T23:59:59.000Z

245

FOR ELECTRIC POWER TRANSMISSION  

E-Print Network (OSTI)

A contract network extends the concept of a contract path to address the problem of loop flow and congestion in electric power transmission systems. A contract network option provides a well defined, internally consistent framework for assigning long-term capacity rights to a complicated electric transmission network. The contract network respects the special conditions induced by Kirchoff's Laws; accommodates thermal, voltage and contingency constraints on transmission capacity; and can be adopted without disturbing existing methods for achieving an economic power dispatch subject to these constraints. By design, a contract network would maintain short-run efficiency through optimal spot price determination of transmission prices. Through payment of congestion rentals, the contract network makes a long-term capacityright holder indifferent between delivery of the power or receipt of payments in a settlement system. And the contract network framework can support allocation of transmission capacity rights through a competitive bidding process. CONTRACT NETWORKS

William W. Hogan; William W. Hogan

1990-01-01T23:59:59.000Z

246

Nonlinear magnetoinductive transmission lines  

E-Print Network (OSTI)

Power transmission in one-dimensional nonlinear magnetic metamaterials driven at one end is investigated numerically and analytically in a wide frequency range. The nonlinear magnetic metamaterials are composed of varactor-loaded split-ring resonators which are coupled magnetically through their mutual inductances, forming thus a magnetoiductive transmission line. In the linear limit, significant power transmission along the array only appears for frequencies inside the linear magnetoinductive wave band. We present analytical, closed form solutions for the magnetoinductive waves transmitting the power in this regime, and their discrete frequency dispersion. When nonlinearity is important, more frequency bands with significant power transmission along the array may appear. In the equivalent circuit picture, the nonlinear magnetoiductive transmission line driven at one end by a relatively weak electromotive force, can be modeled by coupled resistive-inductive-capacitive (RLC) circuits with voltage-dependent cap...

Lazarides, Nikos; Tsironis, G P

2011-01-01T23:59:59.000Z

247

Multistability in nonlinear left-handed transmission lines  

E-Print Network (OSTI)

Employing a nonlinear left-handed transmission line as a model system, we demonstrate experimentally the multi-stability phenomena predicted theoretically for microstructured left-handed metamaterials with a nonlinear response. We show that the bistability is associated with the period doubling which at higher power may result in chaotic dynamics of the transmission line.

Powell, David A; Kivshar, Yuri S

2008-01-01T23:59:59.000Z

248

Transmission Cost Allocation Methodologies for Regional Transmission Organizations  

Science Conference Proceedings (OSTI)

This report describes transmission cost allocation methodologies for transmission projects developed to maintain or enhance reliability, to interconnect new generators, or to access new resources and enhance competitive bulk power markets, otherwise known as economic transmission projects.

Fink, S.; Rogers, J.; Porter, K.

2010-07-01T23:59:59.000Z

249

Electric Transmission Lines (Iowa)  

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

Electric transmission lines capable of operating at 69 kV or greater cannot be constructed along, across, or over any public highways or grounds outside of cities without a franchise from the...

250

Down hole transmission system  

DOE Patents (OSTI)

A transmission system in a downhole component comprises a data transmission element in both ends of the downhole component. Each data transmission element houses an electrically conducting coil in a MCEI circular trough. The electrically conducting coil comprises at least two generally fractional loops. In the preferred embodiment, the transmission elements are connected by an electrical conductor. Preferably, the electrical conductor is a coaxial cable. Preferably, the MCEI trough comprises ferrite. In the preferred embodiment, the fractional loops are connected by a connecting cable. In one aspect of the present invention, the connecting cable is a pair of twisted wires. In one embodiment the connecting cable is a shielded pair of twisted wires. In another aspect of the present invention, the connecting cable is a coaxial cable. The connecting cable may be disposed outside of the MCEI circular trough.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT)

2007-07-24T23:59:59.000Z

251

Designing electricity transmission auctions  

E-Print Network (OSTI)

The UK has ambitious plans for exploiting offshore wind for electricity production in order to meet its challenging target under the EU Renewable Energy Directive. This could involve investing up to 20bn in transmission assets to bring electricity...

Greve, Thomas; Pollitt, Michael G.

2012-10-26T23:59:59.000Z

252

Downhole transmission system  

DOE Patents (OSTI)

A transmission system in a downhole component comprises a data transmission element in both ends of the downhole component. Each data transmission element houses an electrically conducting coil in a MCEI circular trough. An electrical conductor connects both the transmission elements. The electrical conductor comprises at least three electrically conductive elements insulated from each other. In the preferred embodiment the electrical conductor comprises an electrically conducting outer shield, an electrically conducting inner shield and an electrical conducting core. In some embodiments of the present invention, the electrical conductor comprises an electrically insulating jacket. In other embodiments, the electrical conductor comprises a pair of twisted wires. In some embodiments, the electrical conductor comprises semi-conductive material.

Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

2008-01-15T23:59:59.000Z

253

Cloud Transmissivities for Canada  

Science Conference Proceedings (OSTI)

Transmissivities are determined for different cloud types using nine years of hourly irradiance measurements under overcast skies at six Canadian stations. Values for individual stations and for pooled data using irradiances uncorrected for ...

J. A. Davies; M. Abdel-Wahab; J. E. Howard

1985-03-01T23:59:59.000Z

254

Foil Electron Multiplier  

NLE Websites -- All DOE Office Websites (Extended Search)

Foil Electron Multiplier Foil Electron Multiplier Foil Electron Multiplier An apparatus for electron multiplication by transmission that is designed with at least one foil having a front side for receiving incident particles and a back side for transmitting secondary electrons that are produced from the incident particles transiting through the foil. Available for thumbnail of Feynman Center (505) 665-9090 Email Foil Electron Multiplier An apparatus for electron multiplication by transmission that is designed with at least one foil having a front side for receiving incident particles and a back side for transmitting secondary electrons that are produced from the incident particles transiting through the foil. The foil thickness enables the incident particles to travel through the foil and continue on

255

Subject: SPPR Proposed ED5 to Palo Verde Transmission Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Date: 832010 4:04 PM Subject: SPPR Proposed ED5 to Palo Verde Transmission Project VIA ELECTRONIC MAIL TO: DSWFPP@wapa.gov August 3, 2010 Mr. Darrick Moe...

256

Subject: SPPR Proposed ED5 to Palo Verde Transmission Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Date: 832010 4:02 PM Subject: SPPR Proposed ED5 to Palo Verde Transmission Project VIA ELECTRONIC MAIL TO: DSWFPP@wapa.gov August 3, 2010 Mr. Darrick Moe...

257

Transmission Line Grounding  

Science Conference Proceedings (OSTI)

In 2008, the Electric Power Research Institute (EPRI) published a comprehensive grounding report. Published in two parts, the report covered the theoretical and practical aspects of transmission line grounding practices. To further improve the tools available for grounding analysis, an investigation into practical ways to calculate the fault current distribution and ground potential rise of the transmission line grounding system was conducted. Furthermore, a survey of utilities has documented industry pr...

2011-12-23T23:59:59.000Z

258

Transmission Right Of Way  

NLE Websites -- All DOE Office Websites (Extended Search)

About SNR > Right Of Way About SNR > Right Of Way Right Of Way Preferred Vegetation List - Redding & Foothills (XLS - 23K) Preferred Vegetation List - Sacramento Valley (XLS - 170K) WESTERN AREA POWER ADMINISTRATION GENERAL GUIDELINES CONCERNING THE USE OF ELECTRIC TRANSMISSION LINE RIGHTS-OF-WAY Western Area Power Administration (Western) owns a right-of-way easement along the length of the transmission line (width varies by transmission line). Western's rights within the easement include the right to construct, reconstruct, operate, maintain, and patrol the transmission line. Rights usually reserved to the landowner include the right to cultivate, occupy, and use the land for any purpose that does not conflict with Western's use of its easement. To avoid potential conflicts, it is Western's policy to review all proposed uses within the transmission line easement. We consider (1) Safety of the public, (2) Safety of our Employees, (3) Restrictions covered in the easement, (4) Western's maintenance requirements, and (5) Protection of the transmission line structures and (6) Road or street crossings.

259

Open Access Transmission Tariff  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission | OATT Transmission | OATT Skip Navigation Links Transmission Functions Infrastructure projects Interconnection OASIS OATT Western Open Access Transmission Service Tariff Revision Western Area Power Administration submitted its revised Open Access Transmission Service Tariff with the Federal Energy Regulatory Commission on Sept. 30, 2009. The tariff became effective on Dec. 1, 2009, as modified by Western's March 2, 2011 compliance filing. The revised tariff was developed to comply with FERC Order No. 890 and to be consistent with Western's statutory and regulatory requirements. It addresses changes in transmission services and planning. FERC issued an order on Dec. 2, 2010, granting Western's petition for a Declaratory Order approving the tariff as an acceptable reciprocity tariff, subject to Western making a compliance filing within 30 days to address items in Attachment C, Attachment P and Attachment Q. Western made its compliance filing on March 2, 2010, addressing FERC's Dec. 2, 2010, order. FERC accepted Western's March 2, 2011 compliance filing on April 25, 2011. Western has made several ministerial filings to its OATT as part of FERC's eTariff viewer system, the last of these was approved on March 29, 2013. Further detail can be found in the links below.Current OATT

260

Time-dependent restricted-active-space self-consistent field theory for laser-driven many-electron dynamics  

E-Print Network (OSTI)

We present the time-dependent restricted-active-space self-consistent field (TD-RASSCF) theory as a new framework for the time-dependent many-electron problem. The theory generalizes the multiconfigurational time-dependent Hartree-Fock (MCTDHF) theory by incorporating the restricted-active-space scheme well known in time-independent quantum chemistry. Optimization of the orbitals as well as the expansion coefficients at each time step makes it possible to construct the wave function accurately while using only a relatively small number of electronic configurations. In numerical calculations of high-order harmonic generation spectra of a one-dimensional model of atomic beryllium interacting with a strong laser pulse, the TD-RASSCF method is reasonably accurate while largely reducing the computational complexity. The TD-RASSCF method has the potential to treat large atoms and molecules beyond the capability of the MCTDHF method.

Miyagi, Haruhide

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Definition: Transmission | Open Energy Information  

Open Energy Info (EERE)

Transmission Jump to: navigation, search Dictionary.png Transmission An interconnected group of lines and associated equipment for the movement or transfer of electric energy...

262

EC Transmission Line Risk Identification and Analysis  

SciTech Connect

The purpose of this document is to assist in evaluating and planning for the cost, schedule, and technical project risks associated with the delivery and operation of the EC (Electron cyclotron) transmission line system. In general, the major risks that are anticipated to be encountered during the project delivery phase associated with the implementation of the Procurement Arrangement for the EC transmission line system are associated with: (1) Undefined or changing requirements (e.g., functional or regulatory requirements) (2) Underperformance of prototype, first unit, or production components during testing (3) Unavailability of qualified vendors for critical components Technical risks associated with the design and operation of the system are also identified.

Bigelow, Tim S [ORNL

2012-04-01T23:59:59.000Z

263

Interconnection Transmission Planning: Awards | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection Transmission Planning: Awards Interconnection Transmission Planning: Awards List of Interconnection Transmission Planning awards under the American Recovery and...

264

Colorado/Transmission/Agencies | Open Energy Information  

Open Energy Info (EERE)

ColoradoTransmissionAgencies < Colorado | Transmission Jump to: navigation, search Colorado Transmission Roadmap Agency Links Local Regulations State Regulations Summary...

265

Electricity Transmission, A Primer | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission, A Primer Electricity Transmission, A Primer This primer on electric transmission is intended to help policymakers understand the physics of the transmission system,...

266

A Study of Conversion Reactions Using Electron Energy Loss  

Science Conference Proceedings (OSTI)

In this study, conversion mechanism in NiO was studied using high resolution transmission electron microscopy and electron energy loss spectroscopy (EELS).

267

transmission | OpenEI  

Open Energy Info (EERE)

transmission transmission Dataset Summary Description This dataset represents a historical repository of all the numerical data from the smartgrid.gov website condensed into spreadsheets to enable analysis of the data. Below are a couple of things worth noting: Source Smartgrid.gov Date Released March 04th, 2013 (9 months ago) Date Updated March 04th, 2013 (9 months ago) Keywords AMI costs distribution smart grid transmission Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 4Q12 (xlsx, 112.1 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 3Q12 (xlsx, 107.9 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 2Q12 (xlsx, 111.9 KiB)

268

Transmission line capital costs  

Science Conference Proceedings (OSTI)

The displacement or deferral of conventional AC transmission line installation is a key benefit associated with several technologies being developed with the support of the U.S. Department of Energy`s Office of Energy Management (OEM). Previous benefits assessments conducted within OEM have been based on significantly different assumptions for the average cost per mile of AC transmission line. In response to this uncertainty, an investigation of transmission line capital cost data was initiated. The objective of this study was to develop a database for preparing preliminary estimates of transmission line costs. An extensive search of potential data sources identified databases maintained by the Bonneville Power Administration (BPA) and the Western Area Power Administration (WAPA) as superior sources of transmission line cost data. The BPA and WAPA data were adjusted to a common basis and combined together. The composite database covers voltage levels from 13.8 to 765 W, with cost estimates for a given voltage level varying depending on conductor size, tower material type, tower frame type, and number of circuits. Reported transmission line costs vary significantly, even for a given voltage level. This can usually be explained by variation in the design factors noted above and variation in environmental and land (right-of-way) costs, which are extremely site-specific. Cost estimates prepared from the composite database were compared to cost data collected by the Federal Energy Regulatory Commission (FERC) for investor-owned utilities from across the United States. The comparison was hampered because the only design specifications included with the FERC data were voltage level and line length. Working within this limitation, the FERC data were not found to differ significantly from the composite database. Therefore, the composite database was judged to be a reasonable proxy for estimating national average costs.

Hughes, K.R.; Brown, D.R.

1995-05-01T23:59:59.000Z

269

Random walk approach to spin dynamics in a two-dimensional electron gas with spin-orbit coupling  

SciTech Connect

We introduce and solve a semiclassical random walk (RW) model that describes the dynamics of spin polarization waves in zinc-blende semiconductor quantum wells. We derive the dispersion relations for these waves, including the Rashba, linear and cubic Dresselhaus spin-orbit interactions, as well as the effects of an electric field applied parallel to the spin polarization wave vector. In agreement with calculations based on quantum kinetic theory [P. Kleinert and V. V. Bryksin, Phys. Rev. B 76, 205326 (2007)], the RW approach predicts that spin waves acquire a phase velocity in the presence of the field that crosses zero at a nonzero wave vector, q{sub 0}. In addition, we show that the spin-wave decay rate is independent of field at q{sub 0} but increases as (q-q{sub 0}){sup 2} for q {ne} q{sub 0}. These predictions can be tested experimentally by suitable transient spin grating experiments.

Yang, Luyi; Orenstein, J.; Lee, Dung-Hai

2010-09-27T23:59:59.000Z

270

Electric Transmission System Workshop  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lauren Azar Lauren Azar Senior Advisor to Secretary Chu November 2, 2012 Electric Transmission System Workshop We all have "visions," in one form or another: * Corporations call them strategic plans * RTOs ... transmission expansion plans or Order 1000 plans * State PUCs ... integrated resource plans * Employees ... career goals Visions for the Future Artist: Paolo Frattesi Artist: Paolo Frattesi Uncertainty = changing industry Changes in technology, threats and policies Can we make decisions in the face of change? .......How can we not? Can we agree on several key design attributes for the future grid? Taking Action in the Face of Uncertainty Step 1: Establish common ground on key design attributes GTT's Proposed Key Design Attributes:

271

Merchant Transmission Investment  

E-Print Network (OSTI)

merchant transmission model of the type described above, though Australia has adopted a mixed merchant and regu- 6 lated transmission model.3 However, recent academic proposals,4 as well as FERC’s July 2002 Standard Market Design (SMD) proposals, call... that a nodal or locational marginal pricing (LMP) system is in place with attributes similar to those being proposed by the U.S. Federal Energy Regulatory Commission (FERC) in its SMD proposals and to what is in operation in New 3Two merchant lines...

Joskow, Paul; Tirole, Jean

2004-06-16T23:59:59.000Z

272

10-Yr. Transmission Plan  

NLE Websites -- All DOE Office Websites (Extended Search)

Power Marketing Rates Power Marketing Rates 10-Yr Transmission Plan 2012 Customer Meeting Announcement Agenda 120611 CRSP South Projects CRSP South PowerPoint Presentation CRSP South 2009-2011 Capitalized Execution CRSP North Projects CRSP North PowerPoint Presentation CRSP North 2009-2011 Capitalized Execution About Power Marketing Transmission Newsroom Business Policies Products Plan contents OASIS News features Careers No FEAR act Organization chart Plan processes Functions News releases Doing business Privacy policy History General power contract provisions OATT Revisions Fact sheets Energy Services Accessibility Financial information Rates and Repayment Interconnection Publications EPTC Adobe PDF Power projects EPAMP Infrastructure projects Federal Register Notices

273

First tests of THz transmission through a Diamond Anvil Cell  

SciTech Connect

The THz source generated by the accelerator driver for the Jefferson Lab Free Electron Laser is unique in the world in its ability to deliver a high average power beam of ultrashort (<500 fs FWHM) broadband THz pulses. The spectrum of this source presents an ideal probe for many low energy phenomena, and the time structure enables measurement of dynamic processes with sub-ps resolution. An outline of the range of potential applications for this THz source as a probe of sub-ps dynamics in materials under extreme conditions will be presented. To demonstrate the capabilities of this source for just such experiments, the first set of tests to characterize the transmission of the THz beam through a diamond anvil cell (DAC) have been performed. These preliminary results will be presented along with a description of the optical design used to deliver the THz beam into and out of the DAC. The current design will be compared with other possible techniques and the plans for the next set of measurements will also be given.

John Klopf

2011-01-24T23:59:59.000Z

274

NREL: Energy Analysis: Transmission Infrastructure  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission Infrastructure Transmission Infrastructure Grid expansion and planning to allow large scale deployment of renewable generation Large scale deployment of renewable electricity generation will require additional transmission to connect renewable resources, which are wide-spread across the US, but regionally-constrained, to load centers. Long-term transmission planning, based on potential future growth in electric loads and generation resource expansion options, is critical to maintaining the necessary flexibility required for a reliable and robust transmission system. NREL's analyses support transmission infrastructure planning and expansion to enable large-scale deployment of renewable energy in the future. NREL's transmission infrastructure expansion and planning analyses show

275

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

1991-08-27T23:59:59.000Z

276

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other.

Ikezi, Hiroyuki (Rancho Santa Fe, CA); Lin-Liu, Yuh-Ren (San Diego, CA); DeGrassie, John S. (Encinitas, CA)

1991-01-01T23:59:59.000Z

277

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission lines between two adjacent periodic intersections to be longer than the other. 5 figs.

Ikezi, Hiroyuki; Lin-Liu, Yuh-Ren; deGrassie, J.S.

1990-03-02T23:59:59.000Z

278

Borehole data transmission apparatus  

DOE Patents (OSTI)

A borehole data transmission apparatus whereby a centrifugal pump impeller(s) is used to provide a turbine stage having substantial pressure characteristics in response to changing rotational speed of a shaft for the pressure pulsing of data from the borehole through the drilling mud to the surface of the earth.

Kotlyar, Oleg M. (1739 Grandview #2, Idaho Falls, ID 83402)

1993-01-01T23:59:59.000Z

279

Autonomous data transmission apparatus  

DOE Patents (OSTI)

A autonomous borehole data transmission apparatus for transmitting measurement data from measuring instruments at the downhole end of a drill string by generating pressure pulses utilizing a transducer longitudinally responsive to magnetic field pulses caused by electrical pulses corresponding to the measured downhole parameters.

Kotlyar, Oleg M. (4675 W. 3825 S, Salt Lake City, UT 84120)

1997-01-01T23:59:59.000Z

280

Transmission SEAB Presentation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Overcoming Overcoming Institutional Barriers to Infrastructure Development Lauren Azar Senior Advisor to the Secretary U.S. Department of Energy January 31, 2012 Lauren"s Initiatives 1. Rapid Response Team for Transmission 2. Power Marketing Administrations 3. Project Development in the Southwest 4. Congestion Study and NIETC Designations 5. Miscellaneous  EPA Regulations  Market Power

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Transmission planning in China  

Science Conference Proceedings (OSTI)

Though China is well along in restructuring its power markets, it still has some way to travel before economic considerations receive adequate weight in transmission planning decisions. Adoption of more sophisticated tools such as multi-agent modeling will help China continue in its progress in achieving this. (author)

Dong, Jun; Zhang, Jing

2009-07-15T23:59:59.000Z

282

Borehole data transmission apparatus  

DOE Patents (OSTI)

A borehole data transmission apparatus is described whereby a centrifugal pump impeller(s) is used to provide a turbine stage having substantial pressure characteristics in response to changing rotational speed of a shaft for the pressure pulsing of data from the borehole through the drilling mud to the surface of the earth.

Kotlyar, O.M.

1993-03-23T23:59:59.000Z

283

Omega Transmission Lines  

E-Print Network (OSTI)

In this paper, we show how bi-anisotropic media with omega-type response can be realized using periodically loaded transmission lines. General conditions for the needed unit cell circuit block are derived. Also, an implementation is shown and analyzed.

Vehmas, Joni

2013-01-01T23:59:59.000Z

284

STRATEGIC TRANSMISSION INVESTMENT PLAN  

E-Print Network (OSTI)

involves the construction of an approximate 1000 mile HVAC and HVDC transmission project from British ACSR. (Northern Segment) b) A 3000 MVA, 500 kV HVAC to +/-500 kV HVDC Converter at the NEO Station. c) A +/-500 kV HVDC line from the NEO Station to the proposed Collinsville Substation in the San Francisco Bay

285

LAP Transmission Rate  

NLE Websites -- All DOE Office Websites (Extended Search)

LAP Transmission Rate 4.50 4.00 3.82 3.50 3.00 of 2.50 c 0 2.I2 2.68 I 3: 2.00 1.50 1.00 0.50 0.00 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012...

286

Transmission Services J7000  

NLE Websites -- All DOE Office Websites (Extended Search)

C T D E S E R T S O U T H W E S T R E G I O N R O C K Y M O U N T A I N R E G I O N Transmission Services J7000 Ensuring the Reliability of the Bulk Electric System Western's...

287

Autonomous data transmission apparatus  

DOE Patents (OSTI)

A autonomous borehole data transmission apparatus is described for transmitting measurement data from measuring instruments at the downhole end of a drill string by generating pressure pulses utilizing a transducer longitudinally responsive to magnetic field pulses caused by electrical pulses corresponding to the measured downhole parameters. 4 figs.

Kotlyar, O.M.

1997-03-25T23:59:59.000Z

288

Transmission Enhancement Technology Report  

E-Print Network (OSTI)

to increase transmission capability. Section 3 documents existing technologies used in the industry today the traditional types of design alternatives used by Western and the electric industry. The primary system operate at three times the ampacity of Aluminum Conductor Steel Reinforced (ACSR) conductor and has a much

289

Dynamic deformation behavior of equal channel angular extruded ...  

Science Conference Proceedings (OSTI)

X-ray diffraction and transmission electron microscope analyses was conducted to identify the possible deformation mechanisms. Proceedings Inclusion?

290

Application of Precession Electron Diffraction in Density ...  

Science Conference Proceedings (OSTI)

In this paper, GND density calculations obtained using SEM-based EBSD and transmission electron microscope-based PED techniques in ?+? titanium alloys ...

291

Regulations for Electric Transmission and Fuel Gas Transmission Lines Ten  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Transmission and Fuel Gas Transmission Electric Transmission and Fuel Gas Transmission Lines Ten or More Miles Long (New York) Regulations for Electric Transmission and Fuel Gas Transmission Lines Ten or More Miles Long (New York) < Back Eligibility Commercial Fuel Distributor Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Tribal Government Utility Savings Category Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State New York Program Type Siting and Permitting Provider New York State Public Service Commission Any person who wishes to construct an electric or gas transmission line that is more than ten miles long must file documents describing the construction plans and potential land use and environmental impacts of the proposed transmission line. The regulations describe application and review

292

Transmission Developers Inc.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

% ~ % ~ Transmission Developers Inc. July 7, 2011 Mr. Anthony J. Como Director, Permitting and Siting Office ofElectricity Delivery and Energy Reliability (OE-20) U.S. Department of Energy 1000 Independence A venue SW, Room 8G-024 Washington, D.C. 20585 Subject: Champlain Hudson Power Express Project U.S. Department of Energy Presidential Permit Application PP-362 Dear Mr. Como: On January 25, 2010, Transmission Developers, Inc. ("TDI'' or "Applicants") submitted on behalf of Champlain Hudson Power Express, Inc. ("CHPEI") an application to the U.S. Department of Energy ("DOE") for a Presidential Permit and an amendment on August 5, 2010 (collectively, the "Application") in connection with the Champlain Hudson Power Express

293

Transmission Siting_071508.indd  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Coordinating Interstate Electric Coordinating Interstate Electric Transmission Siting: An Introduction to the Debate The National Council on Electricity Policy 2 DISCLAIMER: The National Council on Electricity Policy is funded by the U.S. Department of Energy and the U.S. Environmental Protection Agency. The views and opinions expressed herein are strictly those of the authors and may not necessarily agree with the positions of the National Council on Electricity Policy, its committ ee members or the organizations they represent, the National Council funders, or those who commented on the paper during its draft ing. ACKNOWLEDGMENTS Coordinating Interstate Electric Transmission Siting: An Introduction to the Debate was prepared with the fi nancial assistance of a grant from the U.S. Department of Energy (DOE) Offi ce of Electricity Delivery

294

Drill string transmission line  

DOE Patents (OSTI)

A transmission line assembly for transmitting information along a downhole tool comprising a pin end, a box end, and a central bore traveling between the pin end and the box end, is disclosed in one embodiment of the invention as including a protective conduit. A transmission line is routed through the protective conduit. The protective conduit is routed through the central bore and the ends of the protective conduit are routed through channels formed in the pin end and box end of the downhole tool. The protective conduit is elastically forced into a spiral or other non-linear path along the interior surface of the central bore by compressing the protective conduit to a length within the downhole tool shorter than the protective conduit.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Bradford, Kline (Orem, UT); Fox, Joe (Spanish Fork, UT)

2006-03-28T23:59:59.000Z

295

A Smarter Transmission Grid  

Science Conference Proceedings (OSTI)

Our modern transmission grid transports bulk power over long distances and across many provincial boundaries, but ever-increasing energy demands are significantly transforming it. Worldwide, many catalysts are driving this transformation, including emerging supply- and demand-side technologies, cyber security concerns, and aging infrastructures, to name just a few. As the grid transforms and more grid-connected renewable resources complicate reliability, it will be increasingly difficult to meet its futu...

2010-12-31T23:59:59.000Z

296

Transmission Price Risk Management  

Science Conference Proceedings (OSTI)

This report is concerned with the financial risks that arise from the uncertain price of transmission service in restructured or competitive electricity markets. These risks are most severe in markets with locational pricing (LMP), but they also exist in more traditionally organized electricity markets. This report has two main purposes. The first is to review the existing mathematical models of electricity price formation in spot and forward markets that may be helpful as the foundations for developing ...

2006-12-04T23:59:59.000Z

297

Green Transmission Efficiency Initiative  

Science Conference Proceedings (OSTI)

As a consequence of escalating interest in the environment and climate changea national focus on energy efficiency, and growing electricity demandthe time is right to assess energy efficiency from both an end-use perspective as well as across the utility value chain, from generation, to transmission, to distribution. The reduction of our carbon footprint and increasing the role of renewable energy are an important part of the strategy for the greening for electric energy supply. As a result, efficient po...

2009-07-31T23:59:59.000Z

298

Instrument Series: Microscopy Aberration-Corrected Scanning/Transmission  

NLE Websites -- All DOE Office Websites (Extended Search)

Aberration-Corrected Aberration-Corrected Scanning/Transmission Electron Microscope EMSL's aberration-corrected Titan 80-300(tm) scanning/transmission electron microscope (S/TEM) provides high-resolution imaging with sub-angstrom resolution and spectroscopic capabilities. This state-of-the-art instrument is equipped with a Schottky field-emission electron source, an electron gun monochromator, CEOS hexapole spherical aberration corrector for the probe-forming lens, high-angle annular dark field (HAADF) detector, an X-ray spectrometer (EDS), and a high-resolution Gatan Imaging Filter (GIF). The selection of electron energy between 80 kV and 300 kV enables optimized imaging for a variety of samples, including electron beam sensitive materials. Research Applications

299

Electricity Transmission and Distribution Technologies ...  

Electricity Transmission and Distribution Technologies Available for Licensing U.S. Department of Energy (DOE) laboratories and participating research ...

300

WestConnect Transmission Product  

NLE Websites -- All DOE Office Websites (Extended Search)

WestConnect Transmission Product Federal Register Notices Customer Notifications Customer Comments Approved Rate Order FERC Confirmation...

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Transmission eigenvalues for elliptic operators  

E-Print Network (OSTI)

A reduction of the transmission eigenvalue problem for multiplicative sign-definite perturbations of elliptic operators with constant coefficients to an eigenvalue problem for a non-selfadjoint compact operator is given. Sufficient conditions for the existence of transmission eigenvalues and completeness of generalized eigenstates for the transmission eigenvalue problem are derived. In the trace class case, the generic existence of transmission eigenvalues is established.

Michael Hitrik; Katsiaryna Krupchyk; Petri Ola; Lassi Päivärinta

2010-07-03T23:59:59.000Z

302

Transmission Planning | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

that will improve advanced system monitoring, visualization, control, operations, and market structure will ultimately modernize the electricity transmission infrastructure to...

303

Free electron laser  

DOE Patents (OSTI)

A high gain, single-pass free electron laser formed of a high brilliance electron injector source, a linear accelerator which imparts high energy to the electron beam, and an undulator capable of extremely high magnetic fields, yet with a very short period. The electron injector source is the first stage (gap) of the linear accelerator or a radial line transformer driven by fast circular switch. The linear accelerator is formed of a plurality of accelerating gaps arranged in series. These gaps are energized in sequence by releasing a single pulse of energy which propagates simultaneously along a plurality of transmission lines, each of which feeds the gaps. The transmission lines are graduated in length so that pulse power is present at each gap as the accelerated electrons pass therethrough. The transmission lines for each gap are open circuited at their ends. The undualtor has a structure similar to the accelerator, except that the transmission lines for each gap are substantially short circuited at their ends, thus converting the electric field into magnetic field. A small amount of resistance is retained in order to generate a small electric field for replenishing the electron bunch with the energy lost as it traverses through the undulator structure.

Villa, Francesco (Alameda, CA)

1990-01-01T23:59:59.000Z

304

The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies  

E-Print Network (OSTI)

Certificates of Need for Transmission Lines to Support theMontana-Alberta Tie 230 kV Transmission Line: TransmissionNorthern California Transmission Line Project, Technical

Mills, Andrew D.

2009-01-01T23:59:59.000Z

305

A CRITICAL REVIEW OF WIND TRANSMISSION COST ESTIMATES FROM MAJOR TRANSMISSION PLANNING EFFORTS  

E-Print Network (OSTI)

B. Kirby. 2001. Transmission Planning for a Restructuringindustry_issues/energy_infrastructure/transmission/transmission_hirst.pdf Joskow, P.L. 2005a. “Transmission

Mills, Andrew; Wiser, Ryan; Porter, Kevin

2007-01-01T23:59:59.000Z

306

Electron Microscopy Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Facilities » Facilities » Electron Microscopy Lab Electron Microscopy Lab Focusing on the study of microstructures with electron and ion beam instruments, including crystallographic and chemical techniques. April 12, 2012 Transmission electron microscope Rob Dickerson examines a multiphase oxide scale using the FEI Titan 80-300 transmission electron microscope. Contact Rob Dickerson (505) 667-6337 Email Rod McCabe (505) 606-1649 Email Pat Dickerson (505) 665-3036 Email Tom Wynn (505) 665-6861 Email Dedicated to the characterization of materials through imaging, chemical, and crystallographic analyses of material microstructures in support of Basic Energy Science, Laboratory Directed Research and Development, DoD, DOE, Work for Others, nuclear energy, and weapons programs. Go to full website »

307

NREL: Transmission Grid Integration - Transmission Planning and Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission Planning and Analysis Transmission Planning and Analysis Thumbnail of map the United States that shows wind resources and transmission lines. Enlarge image This map shows the location of wind resources and transmission lines in the United States. See a larger image or state maps. NREL researchers are engaged in transmission planning and analysis to strengthen the electric power system through the integration of solar and wind power. As demand for electricity increases, electric power system operators must plan for and construct new generation and transmission lines. However, variable generation such as solar and wind power plants are often located far from the loads they serve. They depend on transmission lines to transport the electricity they produce to load centers. NREL is working with industry and utilities to address issues related to

308

Electron Microscopy | Center for Functional Nanomaterials  

NLE Websites -- All DOE Office Websites (Extended Search)

Electron Microscopy Facility Electron Microscopy Facility Electron Microscopy This facility consists of four top-of-the line transmission electron microscopes, two of which are highly specialized instruments capable of extreme levels of resolution, achieved through spherical aberration correction. The facility is also equipped with extensive sample-preparation capabilities. The scientific interests of the staff focus on understanding the microscopic origin of the physical and chemical behavior of materials, with specific emphasis on in-situ studies of materials in native, functional environments. Capabilities Atomic-resolution imaging of internal materials structure with scanning transmission and transmission electron microscopy Spectroscopic characterization with energy dispersive x-ray

309

Bulk Power Transmission Study  

E-Print Network (OSTI)

"Texans now have a choice. We can become more efficient and maintain our standard of living, or we can continue business as usual and watch our standard of living erode from competition from other regions. In the past, except for improving reliability, there was no need for a strong transmission system. When Texas generation was primarily gas fueled, the extensive natural gas pipeline network moved energy easily within the state. In recent years two things have changed: 1. Electric utilities have made extensive investment in lignite, coal, and nuclear plants and, 2. Improvements in gas turbine technology and the removal of institutional barriers has encouraged cogeneration at many of our energy intensive process industries. This energy diversity means that there are now significant differences in energy costs between units. The variable costs of generation of power can vary between units by a ratio of 2 or 3 to 1 and this difference will be accentuated when energy costs rise (and they will; it’s a question of when, not if). The potential for costs savings by optional dispatching of the entire interconnected system are greater than ever before as demonstrated by the PUC's Bulk Power Transmission Study. And the potential can be enhanced with added transmission system investment. Cogeneration and small power production has proven to be the most cost effective way for Texas to add additional generating capacity needed to supply an economy that is starting to rebound and to replace old, obsolete power plants. The freedom to locate these facilities at the fuel source or at the site of large thermal demand makes real economic and environmental sense. The use of renewable or waste fuels allows something that would otherwise be wasted to contribute to our economy. Fossil fuels that are displaced can be redirected to another use or consumed for future benefit. By integrating a gas turbine generator with a. process plant, the natural gas required for producing electricity can be reduced by 40% below that required for a combined cycle. The heat rejected from a gas turbine, combined cycle, or steam plant can be redirected to a process use that contributes to our economy by producing something of value to world markets. By contrast a conventional power plant is paid for by the rate payers and consumes Texas natural resources and therefore is a burden rather than an enhancement to our economy. The optimal location of facilities are possible only if there is an adequate transmission system. Utility, consumer and industry must cooperate to improve our transmission system for the benefit of all Texas. The Texas Public Utilities Commission has taken the lead in promoting efficiency by requiring transmission wheeling between qualifying facilities and electric utilities. Several cogeneration facilities have been constructed as a result. In order to encourage small power production, the rule needs to be expanded to include projects interconnected with distribution systems. Most renewable resource projects are relatively small and cannot afford the cost of a high voltage interconnect, and yet their characteristics match a baseload need. The ability to wheel power to a utility that needs base load power from a distribution level interconnection is essential to development of these smaller projects."

John, T.

1988-09-01T23:59:59.000Z

310

Combining Discrete Dislocation Dynamics with Scanning ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Scanning transmission electron microscopy (STEM) is a powerful ... Deformation and Annealing in Zr-2.5Nb by Diffraction Line Profile Analysis.

311

Repetitively pumped electron beam device  

DOE Patents (OSTI)

Disclosed is an apparatus for producing fast, repetitive pulses of controllable length of an electron beam by phased energy storage in a transmission line of length matched to the number of pulses and specific pulse lengths desired. 12 figs.

Schlitt, L.G.

1979-07-24T23:59:59.000Z

312

Repetitively pumped electron beam device  

DOE Patents (OSTI)

Apparatus for producing fast, repetitive pulses of controllable length of an electron beam by phased energy storage in a transmission line of length matched to the number of pulses and specific pulse lengths desired.

Schlitt, Leland G. (Livermore, CA)

1979-01-01T23:59:59.000Z

313

NREL: Transmission Grid Integration - Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Publications Publications Want updates about future transmission grid integration webinars and publications? Join our mailing list. NREL has an extensive collection of publications related to transmission integration research. Explore the resources below to learn more. Selected Project Publications Read selected publications related to these transmission integration projects: Western Wind and Solar Integration Study Eastern Renewable Generation Integration Study Oahu Wind Integration and Transmission Study Flexible Energy Scheduling Tool for Integration of Variable generation (FESTIV) Active power controls Forecasting Grid Simulation. NREL Publications Database NREL's publications database offers a variety of documents related to transmission integration that were written by NREL staff and

314

Electric Transmission Line Siting Compact  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Transmission Line Siting Compact Electric Transmission Line Siting Compact 1 ______________________________________________________________________________ 2 ARTICLE I 3 PURPOSE 4 5 Siting electric transmission lines across state borders and federal lands is an issue for states, the 6 federal government, transmission utilities, consumers, environmentalists, and other stakeholders. 7 The current, multi-year application review process by separate and equal jurisdictions constitutes 8 a sometimes inefficient and redundant process for transmission companies and complicates the 9 efforts of state and federal policy-makers and other stakeholders to develop more robust 10 economic opportunities, increase grid reliability and security, and ensure the consumers have the 11 lowest cost electricity possible. 12

315

Transmission SEAB Presentation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission SEAB Presentation Transmission SEAB Presentation Transmission SEAB Presentation More Documents & Publications Proceedings of the March 25-26, 2009 Conference for the...

316

FINAL PROJECT REPORT LOAD MODELING TRANSMISSION RESEARCH  

E-Print Network (OSTI)

stability  analysis of transmission and distribution Voltage Recovery, NERC Transmission Issues  Subcommitte Air Conditioner Response to Transmission Faults. ” ,” IEEE 

Lesieutre, Bernard

2013-01-01T23:59:59.000Z

317

Flexible Transmission in the Smart Grid  

E-Print Network (OSTI)

differences: models for transmission property rights,” IEEEto solve power transmission network design problems,” IEEES. A. "Network topologies and transmission investment under

Hedman, Kory Walter

2010-01-01T23:59:59.000Z

318

Georgia Transmission Corp | Open Energy Information  

Open Energy Info (EERE)

Georgia Transmission Corp Place Georgia Utility Id 7197 Utility Location Yes Ownership T NERC Location SERC NERC SERC Yes Activity Transmission Yes Activity Buying Transmission Yes...

319

Definition: Transmission Customer | Open Energy Information  

Open Energy Info (EERE)

Load-Serving Entity, or Purchasing-Selling Entity.1 Related Terms transmission service, transmission lines, transmission line References Glossary of Terms Used in Reliability...

320

Definition: Transmission Owner | Open Energy Information  

Open Energy Info (EERE)

facilities.1 Related Terms Transmission Operatortransmission lines, transmission line, transmission lines References Glossary of Terms Used in Reliability Standards An in...

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

A PRECISION ANALOG FIBER OPTIC TRANSMISSION SYSTEM  

E-Print Network (OSTI)

Optical Fibers for Transmission, John Wiley and Sons, 9.Laboratories, Transmission Systems for Communications, BellANALOG FIBER OPTIC TRANSMISSION SYSTEM G. Stover M.S. Thesis

Stover, G.

2010-01-01T23:59:59.000Z

322

Automated manual transmission clutch controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (9375 Kearney Rd., Whitmore Lake, MI 48189); Reed, Jr., Richard G. (3003 Bembridge, Royal Oak, MI 48073); Rausen, David J. (519 S. Gaylord St., Denver, CO 80209)

1999-11-30T23:59:59.000Z

323

Transmission Workshop | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Grid Tech Team » Activities/Outreach » GTT DOE Grid Tech Team » Activities/Outreach » GTT Activities » Transmission Workshop Transmission Workshop Transmission Workshop GTT Transmission Workshop - November 1-2, 2012 On November 1-2, 2012, the GTT presented a workshop on grid integration on the transmission system at the DoubleTree Crystal City near Washington, DC. A draft of the DOE Action Plan Addressing the Electricity Transmission System was discussed during the workshop, which addressed the challenges and opportunities presented by the integration of 21st century energy technologies into the electricity transmission system. Parallel sessions addressed the challenges and opportunities of modernizing the grid and drilled down into key technology areas associated with each of these: System visibility: what advances are needed to "see" the state of

324

Langevin molecular dynamics derived from Ehrenfest dynamics  

E-Print Network (OSTI)

Stochastic Langevin molecular dynamics for nuclei is derived from quantum classical molecular dynamics, also called Ehrenfest dynamics, at positive temperature, assuming that the molecular bulk system is in equilibrium and that the initial data for the electrons is stochastically perturbed from the ground state. The initial electron probability distribution is derived from the Liouville equilibrium solution generated by the nuclei acting as a heat bath for the electrons. The diffusion and friction coefficients in the Langevin equation satisfy Einstein's fluctuation-dissipation relation. The fluctuating initial data yields, in addition to the fluctuating diffusion terms, also a contribution to the drift, modifying the standard ab initio Born-Oppenheimer solution at zero temperature, where the electrons are in their ground state for the current nuclear configuration. The dissipative friction mechanism comes from the evolution of the electron ground state, due to slow dynamics of the nuclei, while the modified d...

Szepessy, Anders

2007-01-01T23:59:59.000Z

325

Density functional theory study of the structural, electronic, lattice dynamical, and thermodynamic properties of Li4SiO4 and its capability for CO2 capture  

SciTech Connect

The structural, electronic, lattice dynamical, optical, thermodynamic, and CO{sub 2} capture properties of monoclinic and triclinic phases of Li{sub 4}SiO{sub 4} are investigated by combining density functional theory with phonon lattice dynamics calculations. We found that these two phases have some similarities in their bulk and thermodynamic properties. The calculated bulk modulus and the cohesive energies of these two phases are close to each other. Although both of them are insulators, the monoclinic phase of Li{sub 4}SiO{sub 4} has a direct band gap of 5.24 eV while the triclinic Li{sub 4}SiO{sub 4} phase has an indirect band gap of 4.98 eV. In both phases of Li{sub 4}SiO{sub 4}, the s orbital of O mainly contributes to the lower-energy second valence band (VB{sub 2}) and the p orbitals contribute to the fist valence band (VB{sub 1}) and the conduction bands (CBs). The s orbital of Si mainly contributes to the lower portions of the VB1 and VB{sub 2}, and Si p orbitals mainly contribute to the higher portions of the VB{sub 1} and VB{sub 2}. The s and p orbitals of Li contribute to both VBs and to CBs, and Li p orbitals have a higher contribution than the Li s orbital. There is possibly a phonon soft mode existing in triclinic {gamma}-Li{sub 4}SiO{sub 4}; in the monoclinic Li{sub 4}SiO{sub 4}, there are three phonon soft modes, which correspond to the one type of Li disordered over a few sites. Their LO-TO splitting indicates that both phases of Li{sub 4}SiO{sub 4} are polar anisotropic materials. The calculated infrared absorption spectra for LO and TO modes are different for these two phases of Li{sub 4}SiO{sub 4}. The calculated relationships of the chemical potential versus temperature and CO{sub 2} pressure for reaction of Li{sub 4}SiO{sub 4} with CO{sub 2} shows that Li{sub 4}SiO{sub 4} could be a good candidate for a high-temperature CO{sub 2} sorbent while used for postcombustion capture technology.

Duan, Yuhua; Parlinski, K.

2011-01-01T23:59:59.000Z

326

Terahertz Quantum-Cascade Transmission-Line Metamaterials  

E-Print Network (OSTI)

Terahertz Transmission-Line Metamaterials . . . . . . .CRLH Transmission Lines . . . . . . . . . . . . . . . .Terahertz CRLH Transmission-Line Metamaterials . . . . . . .

Tavallaee, Amir Ali

2012-01-01T23:59:59.000Z

327

A multilayer grating with a novel layer structure for a flat-field spectrograph attached to transmission electron microscopes in energy region of 2-4 keV  

SciTech Connect

A multilayer mirror with a novel layer structure to uniformly enhance the reflectivity in a few keV energy range at a fixed angle of incidence is invented and applied to a multilayer grating for use in a flat-field spectrograph attached to a conventional electron microscope. The diffraction efficiency of the fabricated multilayer grating having the new layer structure is evaluated at the angle of incidence of 88.65 deg. in the energy region of 2.1-4.0 keV. It is shown that the multilayer grating is effective to uniformly enhance the diffraction efficiency and able to be practically used in this energy region.

Imazono, T.; Koike, M.; Koeda, M.; Nagano, T.; Sasai, H.; Oue, Y.; Yonezawa, Z.; Kuramoto, S.; Terauchi, M.; Takahashi, H.; Handa, N.; Murano, T. [QuBS, Japan Atomic Energy Agency (JAEA), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215 (Japan); Device Dept., Shimadzu Corp., 1 Nishinokyo-Kuwabarcho, Nakagyo-ku, Kyoto 604-8511 (Japan); IMRAM, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan); EC Business Unit, JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558 (Japan)

2012-05-17T23:59:59.000Z

328

DOE Affirms National Interest Electric Transmission Corridor...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Affirms National Interest Electric Transmission Corridor Designations DOE Affirms National Interest Electric Transmission Corridor Designations DOE Affirms National Interest...

329

Kentucky Transmission Line Siting Methodology  

Science Conference Proceedings (OSTI)

EPRI, in conjunction with Georgia Transmission Corporation (GTC) and Photo Science, Inc. (PSI), developed a standardized methodology for siting overhead electric transmission lines. EPRI report 1013080, EPRI-GTC Overhead Electric Transmission Line Siting Methodology, published February 2006, provides additional information. This methodology has been applied in Georgia and currently is being applied to projects in Kentucky by East Kentucky Power Cooperative and E.ON U.S. on behalf of Louisville Gas and El...

2007-12-18T23:59:59.000Z

330

DOE Electricity Transmission System Workshop  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

(including regional diversity, AC-DC transmission and distribution solutions, microgrids, energy storage, and centralized-decentralized control) * Accommodates two-way flows...

331

NREL: Transmission Grid Integration - Webmaster  

NLE Websites -- All DOE Office Websites (Extended Search)

reply. Your name: Your email address: Your message: Send Message Printable Version Transmission Grid Integration Home Issues Projects Research Staff Working with Us Publications...

332

NREL: Transmission Grid Integration - Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Generation Integration Study Oahu Wind Integration and Transmission SIND Toolkit Electricity Market Design Energy Imbalance Markets Flexible Energy Scheduling Tool for...

333

Improvement of an EVT-based HEV using dynamic programming  

E-Print Network (OSTI)

vehicle, dynamic programming, electrical variable transmission I. INTRODUCTION Hybrid Electric Vehicles for automotive hybridization [4], [6]. However other advanced SP-HEVs like the Electric Variable Transmission. Abstract- Automotive engineers and researchers have proposed different Series-Parallel Hybrid Electric

Recanati, Catherine

334

Discreteness and the transmission of light from distant sources  

SciTech Connect

We model the classical transmission of a massless scalar field from a source to a detector on a background causal set. The predictions do not differ significantly from those of the continuum. Thus, introducing an intrinsic inexactitude to lengths and durations--or more specifically, replacing the Lorentzian manifold with an underlying discrete structure--need not disrupt the usual dynamics of propagation.

Dowker, Fay [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom); Henson, Joe; Sorkin, Rafael D. [Perimeter Institute, 31 Caroline Street N., Waterloo, N2L 2Y5 (Canada)

2010-11-15T23:59:59.000Z

335

A Survey of National Transmission Grid Modeling Capabilities at DOE  

E-Print Network (OSTI)

. Outages can be predicted, but only in steady state. They expect to have dynamic capabilities in about.g., generator outages, transmission outages, unexpected load variations). The simulation continues when;ramp up/down rates;startup time;shutdown time; minimum down time;forced outage rate; maintenance

Howle, Victoria E.

336

The interior transmission problem and bounds on transmission eigenvalues  

E-Print Network (OSTI)

We study the interior transmission eigenvalue problem for sign-definite multiplicative perturbations of the Laplacian in a bounded domain. We show that all but finitely many complex transmission eigenvalues are confined to a parabolic neighborhood of the positive real axis.

Michael Hitrik; Katsiaryna Krupchyk; Petri Ola; Lassi Päivärinta

2010-09-28T23:59:59.000Z

337

The interior transmission problem and bounds on transmission eigenvalues  

E-Print Network (OSTI)

We study the interior transmission eigenvalue problem for sign-definite multiplicative perturbations of the Laplacian in a bounded domain. We show that all but finitely many complex transmission eigenvalues are confined to a parabolic neighborhood of the positive real axis.

Hitrik, Michael; Ola, Petri; Päivärinta, Lassi

2010-01-01T23:59:59.000Z

338

Ultrafast supercontinuum fiber-laser based pump-probe scanning MOKE microscope for the investigation of electron spin dynamics in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution  

E-Print Network (OSTI)

We describe a two-color pump-probe scanning magneto-optical Kerr effect (MOKE) microscope which we have developed to investigate electron spin phenomena in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution. The key innovation of our microscope is the usage of an ultrafast `white light' supercontinuum fiber-laser source which provides access to the whole visible and near-infrared spectral range. Our Kerr microscope allows for the independent selection of the excitation and detection energy while avoiding the necessity to synchronize the pulse trains of two separate picosecond laser systems. The ability to independently tune the pump and probe wavelength enables the investigation of the influence of excitation energy on the optically induced electron spin dynamics in semiconductors. We demonstrate picosecond real-space imaging of the diffusive expansion of optically excited electron spin packets in a (110) GaAs quantum well sample to illustrate the capabilities of t...

Henn, T; Ossau, W; Molenkamp, L W; Biermann, K; Santos, P V

2013-01-01T23:59:59.000Z

339

Chapter 4 Transmission Adequacy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chapter 4 Transmission Adequacy Chapter 4 Transmission Adequacy Chapter 4 Transmission Adequacy Transmission lines are the critical link between the point of electricity generation and consumers. The U.S. transmission grid infrastructure is owned and operated by approximately 3,000 distribution utilities and 500 transmission owners. This structure presents a distinct set of challenges in transmission planning, siting, cost allocation, grid operations and management, technological innovation, financing and construction. The development and deployment of a national strategy on transmission that meets the needs of all parties is extremely complex; however, a solution is desperately needed. Chapter 4 Transmission Adequacy More Documents & Publications Draft Chapter 4: Transmission Adequacy

340

Duke Energy's Transmission Roadmap Initiative  

Science Conference Proceedings (OSTI)

Duke Energy's Transmission Roadmap Initiative advances a vision for development of a power delivery communications and automation infrastructure. The initiative describes performance of a communications upgrade to substations, implementation of select technologies and applications, and integration of enterprise applications, databases, and systems. This report provides a comprehensive view of Duke's Transmission Roadmap Initiative, with a complete technology assessment, infrastructure overview, and discu...

2009-09-18T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

HVDC power transmission technology assessment  

SciTech Connect

The purpose of this study was to develop an assessment of the national utility system`s needs for electric transmission during the period 1995-2020 that could be met by future reduced-cost HVDC systems. The assessment was to include an economic evaluation of HVDC as a means for meeting those needs as well as a comparison with competing technologies such as ac transmission with and without Flexible AC Transmission System (FACTS) controllers. The role of force commutated dc converters was to be assumed where appropriate. The assessment begins by identifying the general needs for transmission in the U.S. in the context of a future deregulated power industry. The possible roles for direct current transmission are then postulated in terms of representative scenarios. A few of the scenarios are illustrated with the help of actual U.S. system examples. non-traditional applications as well as traditional applications such as long lines and asynchronous interconnections are discussed. The classical ``break-even distance`` concept for comparing HVDC and ac lines is used to assess the selected scenarios. The impact of reduced-cost converters is reflected in terms of the break-even distance. This report presents a comprehensive review of the functional benefits of HVDC transmission and updated cost data for both ac and dc system components. It also provides some provocative thoughts on how direct current transmission might be applied to better utilize and expand our nation`s increasingly stressed transmission assets.

Hauth, R.L.; Tatro, P.J.; Railing, B.D. [New England Power Service Co., Westborough, MA (United States); Johnson, B.K.; Stewart, J.R. [Power Technologies, Inc., Schenectady, NY (United States); Fink, J.L.

1997-04-01T23:59:59.000Z

342

Semiclassical transmission across transition states  

E-Print Network (OSTI)

It is shown that the probability of quantum-mechanical transmission across a phase space bottleneck can be compactly approximated using an operator derived from a complex Poincar\\'e return map. This result uniformly incorporates tunnelling effects with classically-allowed transmission and generalises a result previously derived for a classically small region of phase space.

Stephen C. Creagh

2005-06-01T23:59:59.000Z

343

Transmission Reliability | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission Reliability Transmission Reliability Transmission Reliability Modernizing America's electricity infrastructure is one of the U.S. Department of Energy's top priorities. The DOE Strategic Plan states that today's electric grid needs to be more efficient, reliable, and secure. A modern, smarter electric grid may save consumers money, help our economy run more efficiently, allow rapid growth in renewable energy sources, and enhance energy reliability. The Department's research into a variety of tools that will improve advanced system monitoring, visualization, control, operations, and market structure will ultimately modernize the electricity transmission infrastructure to ease congestion, allow for increases in demand, and provide a greater degree of security. The Transmission Reliability Program is aligned with this strategic plan

344

ITC Transmission | Open Energy Information  

Open Energy Info (EERE)

ITC Transmission ITC Transmission Jump to: navigation, search Name ITC Transmission Place Michigan Utility Id 56068 Utility Location Yes Ownership T NERC RFC Yes ISO MISO Yes Activity Transmission Yes Alt Fuel Vehicle Yes Alt Fuel Vehicle2 Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates No Rates Available References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=ITC_Transmission&oldid=410858" Categories: EIA Utility Companies and Aliases Utility

345

PROPOSAL FOR CONTINGENT TRANSMISSION PLANS  

E-Print Network (OSTI)

How should the WECC’s RTEP process develop a 10-year transmission plan based upon transmission studies completed over the past several years? This paper explores the notion of a “plan ” that consists of a package containing a small number of “contingent plans ” that would correspond to a limited number of future states of the world by 2020. The rationale for developing transmission plans on a contingent basis is based on the following observations. Contingencies. Insights from TEPPC transmission planning over the past several years indicate that the demand for future transmission expansion in the West is contingent upon a number of important drivers including: (1) Levels of state renewable portfolio standards (RPS); (2) Development of remote versus local renewable generation; (3) Load growth given DSM policies and economic growth; (4) Policies to reduce greenhouse gas (GHG) emissions; (5) Shifts of innovation and cost competitiveness between wind and solar energy; (6) Advances in distributed generation technologies;

unknown authors

2010-01-01T23:59:59.000Z

346

Regional Transmission Projects: Finding Solutions  

Science Conference Proceedings (OSTI)

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

The Keystone Center

2005-06-15T23:59:59.000Z

347

Energy Transmission and Infrastructure  

SciTech Connect

The objective of Energy Transmission and Infrastructure Northern Ohio (OH) was to lay the conceptual and analytical foundation for an energy economy in northern Ohio that will: • improve the efficiency with which energy is used in the residential, commercial, industrial, agricultural, and transportation sectors for Oberlin, Ohio as a district-wide model for Congressional District OH-09; • identify the potential to deploy wind and solar technologies and the most effective configuration for the regional energy system (i.e., the ratio of distributed or centralized power generation); • analyze the potential within the district to utilize farm wastes to produce biofuels; • enhance long-term energy security by identifying ways to deploy local resources and building Ohio-based enterprises; • identify the policy, regulatory, and financial barriers impeding development of a new energy system; and • improve energy infrastructure within Congressional District OH-09. This objective of laying the foundation for a renewable energy system in Ohio was achieved through four primary areas of activity: 1. district-wide energy infrastructure assessments and alternative-energy transmission studies; 2. energy infrastructure improvement projects undertaken by American Municipal Power (AMP) affiliates in the northern Ohio communities of Elmore, Oak Harbor, and Wellington; 3. Oberlin, OH-area energy assessment initiatives; and 4. a district-wide conference held in September 2011 to disseminate year-one findings. The grant supported 17 research studies by leading energy, policy, and financial specialists, including studies on: current energy use in the district and the Oberlin area; regional potential for energy generation from renewable sources such as solar power, wind, and farm-waste; energy and transportation strategies for transitioning the City of Oberlin entirely to renewable resources and considering pedestrians, bicyclists, and public transportation as well as drivers in developing transportation policies; energy audits and efficiency studies for Oberlin-area businesses and Oberlin College; identification of barriers to residential energy efficiency and development of programming to remove these barriers; mapping of the solar-photovoltaic and wind-energy supply chains in northwest Ohio; and opportunities for vehicle sharing and collaboration among the ten organizations in Lorain County from the private, government, non-profit, and educational sectors. With non-grant funds, organizations have begun or completed projects that drew on the findings of the studies, including: creation of a residential energy-efficiency program for the Oberlin community; installation of energy-efficient lighting in Oberlin College facilities; and development by the City of Oberlin and Oberlin College of a 2.27 megawatt solar photovoltaic facility that is expected to produce 3,000 megawatt-hours of renewable energy annually, 12% of the College’s yearly power needs. Implementation of these and other projects is evidence of the economic feasibility and technical effectiveness of grant-supported studies, and additional projects are expected to advance to implementation in the coming years. The public has benefited through improved energydelivery systems and reduced energy use for street lighting in Elmore, Oak Harbor, and Wellington; new opportunities for assistance and incentives for residential energy efficiency in the Oberlin community; new opportunities for financial and energy savings through vehicle collaboration within Lorain County; and decreased reliance on fossil fuels and expanded production of renewable energy in the region. The dissemination conference and the summary report developed for the conference also benefited the public, but making the findings and recommendations of the regional studies broadly available to elected officials, city managers, educators, representatives of the private sector, and the general public.

Mathison, Jane

2012-12-31T23:59:59.000Z

348

NWCC Transmission Case Study III  

DOE Green Energy (OSTI)

OAK-B135 Transmission System Improvements for Wind Energy Development in the Upper Midwest and Great Plains: Opportunities and Obstacles. This case study set out to ascertain the validity of three assumptions from the perspectives of stakeholders involved in wind energy and transmission issues in the Upper Midwest and Great Plains. The assumptions, and the stakeholders' reactions to each, are summarized below: Assumption 1--Transmission system improvements would provide significant benefits to the electricity network and its customers. Respondents acknowledge the potential for overall system benefits in the form of reduced line losses, improved grid stability and reliability, and enhanced ability to conduct spot market transactions. They also agree that these benefits relate to specific regional needs. However, there is disagreement over the extent of other benefits such as efficiency gains and cost savings from reduced line losses. Further, environmental and community interest groups point out that none of these benefits are realized without significant financial, environmental and social costs. Assumption 2--The benefits of transmission improvements would be helpful, but not confined, to wind power. All respondents agree that wind energy could benefit from transmission system improvements. But they also acknowledge, reluctantly, in the case of environmental stakeholders, that the benefits of an improved transmission system cannot be limited to environmentally preferable forms of generation. Some environmental and community advocate respondents also feel that transmission system improvement projects can be avoided altogether through energy conservation and efficiency measures, and by substituting wind energy for fossil generation. Assumption 3--Transmission alliances among stakeholders within and external to the wind community can provide benefits in the public interest. The fractured, multi-jurisdictional governance of the regional transmission system, and the distrust and diversity of perspectives among affected stakeholders, may make the formation of multi-stakeholder alliances necessary to accomplishing transmission goals. If the wind industry and utilities want to partner with environmental and community advocate groups in supporting a transmission project, they may have to convince these groups that the project would result in a net environmental benefit. The project proponents would have to make the case that the benefits of the additional wind energy will at least offset the emissions of any additional fossil generation made possible by the transmission project, as well as offset the environmental impact of the transmission project itself.

Terry Allison, Steve Wiese

2000-03-01T23:59:59.000Z

349

The Cost of Transmission for Wind Energy: A Review of Transmission...  

NLE Websites -- All DOE Office Websites (Extended Search)

Wind Energy: A Review of Transmission Planning Studies Title The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies Publication Type Report Year of...

350

The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies  

E-Print Network (OSTI)

low unit transmission costs, there were still numerous studies with high transmission voltages that had much higher unit costs than studies with transmission lines

Mills, Andrew D.

2009-01-01T23:59:59.000Z

351

The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies  

E-Print Network (OSTI)

Certificates of Need for Transmission Lines to Support theand Preference in Transmission Service. ” Washington, D.C. :Integrating Wind into Transmission Planning: The Rocky

Mills, Andrew D.

2009-01-01T23:59:59.000Z

352

A CRITICAL REVIEW OF WIND TRANSMISSION COST ESTIMATES FROM MAJOR TRANSMISSION PLANNING EFFORTS  

E-Print Network (OSTI)

such as major transmission lines or large generators, areto the nearest bulk transmission line is the only dedicatedon constrained transmission lines (or conversely, pay

Mills, Andrew; Wiser, Ryan; Porter, Kevin

2007-01-01T23:59:59.000Z

353

The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies  

E-Print Network (OSTI)

transmission cost barrier for wind energy. A secondary goalfocus on the cost of transmission for wind energy does notincremental cost of transmission for wind energy implied by

Mills, Andrew D.

2009-01-01T23:59:59.000Z

354

A CRITICAL REVIEW OF WIND TRANSMISSION COST ESTIMATES FROM MAJOR TRANSMISSION PLANNING EFFORTS  

E-Print Network (OSTI)

Transmission Planning and Wind Energy. Issue Brief. August.of new transmission for wind energy due to the complex andincreasingly including wind energy in transmission plans. We

Mills, Andrew; Wiser, Ryan; Porter, Kevin

2007-01-01T23:59:59.000Z

355

Midwest Transmission Workshop I Summary  

SciTech Connect

OAK-B135 The meeting was opened with a review of the purposes of the workshop: (1) Present and discuss key studies and assessments of transmission upgrades, additions and related issues for the upper Midwest, including work that addresses the full range of views on these topics; (2) Understand the various transmission issues in the upper Midwest and discuss options for addressing the issues; and (3) Identify the decision makers and entities that need to play an active role if transmission issues are to be resolved, and agree on next steps for engaging these individuals and organizations through education, outreach, and information dissemination.

Kevin Bryan

2001-05-01T23:59:59.000Z

356

Electrical transmission line diametrical retainer  

DOE Patents (OSTI)

The invention is a mechanism for retaining an electrical transmission line. In one embodiment of the invention it is a system for retaining an electrical transmission line within down hole components. In accordance with one aspect of the invention, the system includes a plurality of downhole components, such as sections of pipe in a drill string. The system also includes a coaxial cable running between the first and second end of a drill pipe, the coaxial cable having a conductive tube and a conductive core within it. The invention allows the electrical transmission line to with stand the tension and compression of drill pipe during routine drilling cycles.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)

2004-12-14T23:59:59.000Z

357

TMS e-News: The monthly electronic newsletter for TMS  

Science Conference Proceedings (OSTI)

They keep silent watch over the long, dim corridor to the Carnegie-Mellon .... Transmission electron microscopy revealed a C amorphizing dose of ?5.0 × 10

358

NCEM National Center for Electron Microscopy: Microscopes and...  

NLE Websites -- All DOE Office Websites (Extended Search)

I The TEAM I microscope is a double-aberration-corrected (scanning) transmission electron microscope (STEMTEM) capable of producing images with 50 pm resolution. The basic...

359

Electronic Structure of Cobalt Nanocrystals Suspended in Liquid  

NLE Websites -- All DOE Office Websites (Extended Search)

layer made up of molecules of an organic surfactant (oleic acid). Bottom: Transmission electron microscope (TEM) image of cobalt nanocrystals. Scale bar 50 nm. Colloidal...

360

Transmission Planning | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Planning Planning Transmission Planning Modernizing America's electricity infrastructure is one of the U.S. Department of Energy's top priorities. The National Transmission Grid Study (PDF 2.0 MB) made clear that without dramatic improvements and upgrades over the next decade our nation's transmission system will fall short of the reliability standards our economy requires, and will result in higher electricity costs to consumers. The Department's research into a variety of tools that will improve advanced system monitoring, visualization, control, operations, and market structure will ultimately modernize the electricity transmission infrastructure to ease congestion, allow for increases in demand, and provide a greater degree of security. The next generation supervisory control and data acquisition (SCADA) and

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

National Electric Transmission Congestion Studies  

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

Section 216(a) of the Federal Power Act, as amended by the Energy Policy Act of 2005, directs the U.S. Department of Energy (DOE) to conduct a study every three years on electric transmission...

362

Managing Transmission Line Wood Structures  

Science Conference Proceedings (OSTI)

The objective of this project is to reduce capital cost by extending life expectancy of overhead transmission wood structures through inspection and assessment procedures and through aging mitigation techniques and tools.

2005-11-29T23:59:59.000Z

363

Accounting-related transmission issues  

Science Conference Proceedings (OSTI)

Various initiatives have been undertaken by the Federal Energy Regulatory Commission (FERC) to deregulate wholesale electric energy markets. These initiatives have focused on restructuring the transmission systems in the US and recently have culminated in a proposal requiring formation of and participation in regional transmission organizations. The overall form of regulation selected to determine rates for transmission entities as well as underlying regulatory decisions reached on key issues will have profound implications for transmission entities. For example, traditional cost-based regulation would require one set of accounting and reporting rules, while incentive-based regulation may not be subject to those same rules. An overview of some of the major accounting and financial reporting issues that will need to be considered is presented.

Niehaus, M.; Bjorn, P.; Pate, G.

1999-12-01T23:59:59.000Z

364

Initial assessment: electromagnetic compatibility aspects of proposed SPS Microwave Power Transmission System (MPTS) operations  

DOE Green Energy (OSTI)

An analysis of major concerns with regard to the effects on radio and electronic systems by the proposed Microwave Power Transmission System for transmitting power from a satellite solar power station to earth is presented. (LCL)

Not Available

1978-02-01T23:59:59.000Z

365

Managing Transmission Line Wood Structures  

Science Conference Proceedings (OSTI)

Transmission and distribution infrastructures throughout the world are aging. As such, inspection, assessment, and maintenance of existing facilities have become increasingly important topics. This valuable reference provides an in-depth look at all facets of an inspection, assessment, and maintenance program for transmission line wood structures to help utilities develop and refine individual maintenance programs. The report is part of a broader multi-year effort by EPRI to develop a comprehensive handb...

2006-09-28T23:59:59.000Z

366

Transmission Structure Foundation Design Guide  

Science Conference Proceedings (OSTI)

This guide contains the most current and comprehensive information for the design of foundations for overhead line structures. The guide covers the complete transmission structure foundation design process from the subsurface investigations and design of the foundations, to the construction and inspection of the foundation. Reference documents to assist transmission structure foundation designers in the development of specifications such as for subsurface investigations and foundation construction ...

2012-11-28T23:59:59.000Z

367

Transmission Valuation and Cost Recovery  

Science Conference Proceedings (OSTI)

This technical update provides information on the status of the electric power industry regarding the economic valuation of transmission projects. Such valuations became critical with the introduction of economic transmission projects in the context of competitive electricity markets. Economic valuation is also becoming increasingly important for traditional reliability upgrades, because of the need for consistency in cost allocations between the two types of upgrades. The year 2005 has brought significa...

2005-12-22T23:59:59.000Z

368

Flexible Transmission in the Smart Grid  

E-Print Network (OSTI)

case study of U.S. transmission line siting,” Energy Policy,Dual variable on transmission line k’s power flownetwork branches (transmission lines), it is possible to

Hedman, Kory Walter

2010-01-01T23:59:59.000Z

369

Ultra-Long-Haul WDM transmission systems  

Science Conference Proceedings (OSTI)

This paper discusses the key transmission issues and design considerations for ultra-long-haul WDM systems. The key enabling technologies for the current generation of ultra-long-haul WDM transmission are described. Noise analysis and transmission modelling ...

Y. R. Zhou; A. Lord; S. R. Sikora

2002-10-01T23:59:59.000Z

370

A Radiation-Hard Dual Channel 4-bit Pipeline for a 12-bit 40 MS/s ADC Prototype with extended Dynamic Range for the ATLAS Liquid Argon Calorimeter Readout Electronics Upgrade at the CERN LHC  

E-Print Network (OSTI)

The design of a radiation-hard dual channel 12-bit 40 MS/s pipeline ADC with extended dynamic range is presented, for use in the readout electronics upgrade for the ATLAS Liquid Argon Calorimeters at the CERN Large Hadron Collider. The design consists of two pipeline A/D channels with four Multiplying Digital-to-Analog Converters with nominal 12-bit resolution each. The design, fabricated in the IBM 130 nm CMOS process, shows a performance of 68 dB SNDR at 18 MHz for a single channel at 40 MS/s while consuming 55 mW/channel from a 2.5 V supply, and exhibits no performance degradation after irradiation. Various gain selection algorithms to achieve the extended dynamic range are implemented and tested.

Kuppambatti, Jayanth; Andeen, Timothy; Kinget, Peter; Brooijmans, Gustaaf

2013-01-01T23:59:59.000Z

371

A Radiation-Hard Dual Channel 4-bit Pipeline for a 12-bit 40 MS/s ADC Prototype with extended Dynamic Range for the ATLAS Liquid Argon Calorimeter Readout Electronics Upgrade at the CERN LHC  

E-Print Network (OSTI)

The design of a radiation-hard dual channel 12-bit 40 MS/s pipeline ADC with extended dynamic range is presented, for use in the readout electronics upgrade for the ATLAS Liquid Argon Calorimeters at the CERN Large Hadron Collider. The design consists of two pipeline A/D channels with four Multiplying Digital-to-Analog Converters with nominal 12-bit resolution each. The design, fabricated in the IBM 130 nm CMOS process, shows a performance of 68 dB SNDR at 18 MHz for a single channel at 40 MS/s while consuming 55 mW/channel from a 2.5 V supply, and exhibits no performance degradation after irradiation. Various gain selection algorithms to achieve the extended dynamic range are implemented and tested.

Jayanth Kuppambatti; Jaroslav Ban; Timothy Andeen; Peter Kinget; Gustaaf Brooijmans

2013-07-31T23:59:59.000Z

372

Correlated exciton dynamics in semiconductor nanostructures  

E-Print Network (OSTI)

The absorption and dissipation of energy in semiconductor nanostructures are often determined by excited electron dynamics. In semiconductors, one fundamentally important electronic state is an exciton, an excited electron ...

Wen, Patrick, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

373

DOE Affirms National Interest Electric Transmission Corridor...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Affirms National Interest Electric Transmission Corridor Designations DOE Affirms National Interest Electric Transmission Corridor Designations March 6, 2008 - 11:54am Addthis...

374

DOE National Interest Electric Transmission Corridors Conference  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

National Interest Electric Transmission Corridors Conference March 29, 2006 Hilton Garden Hotel Chicago, IL William H. Whitehead General Manager, Transmission Strategy PJM...

375

Electricity Transmission Data Needs Focus Group Results  

U.S. Energy Information Administration (EIA)

power, transmission flows within states, the implications of transmission on capacity expansion decisions and costs; age of transformers and other facilities;

376

DOE Transmission Capacity Report | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Capacity Report Transmission Capacity Report DOE Transmission Capacity Report DOE Transmission Capacity Report: Transmission lines, substations, circuit breakers, capacitors, and other equipment provide more than just a highway to deliver energy and power from generating units to distribution systems. Transmission systems both complement and substitute for generation. Transmission generally enhances reliability; lowers the cost of electricity delivered to consumers; limits the ability of generators to exercise market power; and provides flexibility to protect against uncertainties about future fuel prices, load growth, generator construction, and other factors affecting the electric system. DOE Transmission Capacity Report More Documents & Publications Report to Congress:Impacts of the Federal Energy Regulatory Commission's

377

Casablanca Carlos American Electric Power Transmission Owner  

E-Print Network (OSTI)

(Facilitator) Chantal PJM Interconnection Not Applicable Horstmann John Dayton Power & Light Company (The) Transmission Owner Issermoyer John PPL Electric Utilities Corp. dba PPL Utilities Transmission Owner

Pjm Interconnection Llc; Teleconference Webex Participants; Firstenergy Solutions; Corp Transmission Owner; Boltz Jeff; Firstenergy Solutions; Corp Transmission Owner; Fecho Thomas; Indiana Michigan; Power Company; Transmission Owner; Patten Kevin; Company Transmission Owner

2012-01-01T23:59:59.000Z

378

Electric generating or transmission facility: determination of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric generating or transmission facility: determination of rate-making principles and treatment: procedure (Kansas) Electric generating or transmission facility: determination...

379

Definition: Deferred Transmission Capacity Investments | Open...  

Open Energy Info (EERE)

transformers.1 Related Terms transmission lines, transformer, transmission line, sustainability References SmartGrid.gov 'Description of Benefits' An inl LikeLike UnlikeLike...

380

EIS-0285: Transmission System Vegetation Management Program ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission System Vegetation Management Program June 23, 2000 EIS-0285: EPA Notice of Availability of the Final Environmental Impact Statement Transmission System Vegetation...

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Interconnection-Wide Transmission Planning Initiative: Topic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency...

382

Transmission/Photo Gallery | Open Energy Information  

Open Energy Info (EERE)

Gallery < Transmission Jump to: navigation, search PhotoGalleryHeader.png Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada...

383

American Transmission Systems Inc | Open Energy Information  

Open Energy Info (EERE)

American Transmission Systems Inc Place Ohio Utility Id 56162 Utility Location Yes Ownership T NERC Location RFC NERC RFC Yes ISO MISO Yes Activity Transmission Yes References EIA...

384

Transmission/Permitting Atlas | Open Energy Information  

Open Energy Info (EERE)

Atlas < Transmission Jump to: navigation, search PermittingAtlasHeader.png Roadmap Compare States General Transmission Dashboard Permitting Atlas Compare States Arizona California...

385

Interconnection-Wide Transmission Planning Initiative: Topic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection...

386

NREL: Transmission Grid Integration - Eastern Renewable Generation...  

NLE Websites -- All DOE Office Websites (Extended Search)

transmission? How does geographic diversity of wind reduce wind integration costs? How do offshore and onshore wind power compare? What transmission is needed to facilitate higher...

387

Definition: Firm Transmission Service | Open Energy Information  

Open Energy Info (EERE)

Definition No reegle definition available. Also Known As Firm services Related Terms transmission lines, electricity generation, transmission line, smart grid References ...

388

Definition: Transmission Reliability | Open Energy Information  

Open Energy Info (EERE)

to ensure reliable system operation as system conditions change.1 Related Terms transmission lines, transfer capability, system, transmission line References Glossary...

389

Definition: Transmission Reliability Margin | Open Energy Information  

Open Energy Info (EERE)

system operation as system conditions change.1 Related Terms transfer capability, transmission lines, system, transmission line References Glossary of Terms Used in...

390

Definition: Transmission Constraint | Open Energy Information  

Open Energy Info (EERE)

that may be reached during normal or contingency system operations.1 Related Terms transmission lines, system, contingency, transmission line, element References ...

391

Estes-Flatiron Transmission Line Rebuild  

NLE Websites -- All DOE Office Websites (Extended Search)

which is a cooperating agency in the project. The proposed project would: Rebuild aging and deteriorating transmission lines Reduce the number of linear miles of transmission...

392

Michigan Electric Transmission Company | Open Energy Information  

Open Energy Info (EERE)

Transmission Company Jump to: navigation, search Name Michigan Electric Transmission Company Place Michigan Utility Id 56163 Utility Location Yes Ownership T NERC RFC Yes ISO MISO...

393

Electric Power Generation and Transmission (Iowa) | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Power Generation and Transmission (Iowa) Electric Power Generation and Transmission (Iowa) < Back Eligibility Agricultural Industrial Investor-Owned Utility MunicipalPublic...

394

Definition: Non-Firm Transmission Service | Open Energy Information  

Open Energy Info (EERE)

available. Also Known As Interruptible Load or Interruptible Demand Related Terms transmission lines, electricity generation, transmission line, firm transmission service,...

395

Many Body Physics with Coupled Transmission Line Resonators  

E-Print Network (OSTI)

We present the Josephson junction intersected superconducting transmission line resonator. In contrast to the Josephson parametric amplifier, Josephson bifurcation amplifier and Josephson parametric converter we consider the regime of few microwave photons. We review the derivation of eigenmode frequencies and zero point fluctuations of the nonlinear transmission line resonator and the derivation of the eigenmode Kerr nonlinearities. Remarkably these nonlinearities can reach values comparable to Transmon qubits rendering the device ideal for accessing the strongly correlated regime. This is particularly interesting for investigation of quantum many-body dynamics of interacting particles under the influence of drive and dissipation. We provide current profiles for the device modes and investigate the coupling between resonators in a network of nonlinear transmission line resonators.

Martin Leib; Michael J. Hartmann

2012-08-01T23:59:59.000Z

396

X-Ray diffraction analysis and transmission electron microscopic ...  

Science Conference Proceedings (OSTI)

eral in women with osteoporosis. Calcif Tissue Res 21:452-. 456. 6. Dahllof G, Lindskog S, Theorell K, Ussisoo R (1987) Con- comitant regional odontodysplasia ...

397

Security Best Practices for the Electronic Transmission of ...  

Science Conference Proceedings (OSTI)

... 7682 provides best practices for decommissioning systems. ... When state law or procedure mandates the ... cover those plans and procedures used to ...

2011-09-15T23:59:59.000Z

398

High-voltage DC transmission: a power electronics workhorse  

Science Conference Proceedings (OSTI)

Thyristor-based HVDC converter technology is used for highly reliable power transfer across natural or national boundaries or between AC systems designed for different frequencies or incompatible frequency controls. The author discusses the benefits ...

N. G. Hingorani

1996-04-01T23:59:59.000Z

399

Letters to ESEX High resolution transmission electron microscopy  

E-Print Network (OSTI)

. Montakhab and A. Asadian, Phys. Rev. A 77, 062322 (2008). [13] B. Fortescue and H. K. Lo, Phys. Rev. Lett

Dorn, Ron

400

Analytical Transmission Electron Microscopy in the Third Dimension  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Optical and X-ray Imaging Techniques for Material Characterization.

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Multi-transmission-line-beam interactive system  

E-Print Network (OSTI)

We construct here a Lagrangian field formulation for a system consisting of an electron beam interacting with a slow-wave structure modeled by a possibly non-uniform multiple transmission line (MTL). In the case of a single line we recover the linear model of a traveling wave tube (TWT) due to J.R. Pierce. Since a properly chosen MTL can approximate a real waveguide structure with any desired accuracy, the proposed model can be used in particular for design optimization. Furthermore, the Lagrangian formulation provides for: (i) a clear identification of the mathematical source of amplification, (ii) exact expressions for the conserved energy and its flux distributions obtained from the Noether theorem. In the case of uniform MTLs we carry out an exhaustive analysis of eigenmodes and find sharp conditions on the parameters of the system to provide for amplifying regimes.

Alexander Figotin; Guillermo Reyes

2013-04-19T23:59:59.000Z

402

DOE Transmission System Integration Workshop  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heyeck, AEP, Sr. Vice President, Transmission Heyeck, AEP, Sr. Vice President, Transmission and Chair, EPRI Power Delivery & Utilization Sector Council November 01-02, 2012 DoubleTree Hotel, Crystal City Washington D.C. DOE Transmission System Integration Workshop 2 © 2012 Electric Power Research Institute, Inc. All rights reserved. Near-Zero Emissions Long-Term Operations Renewable Integration Water Management Electric Vehicles Demand Response & Efficiency Renewable Energy Energy Storage Sensors & Control Cyber Security Supply = Demand The Power System Supply to Demand Requires a full portfolio of innovative technologies. Tomorrow's Power System One size does not fit all 3 © 2012 Electric Power Research Institute, Inc. All rights reserved. Grid Transformation to Ensure Reliability, Efficiency, Resiliency and Security

403

Midwest Transmission Workshop III Summary  

DOE Green Energy (OSTI)

OAK-B135 On March 12-13, 2002, the National Wind Coordinating Committee (NWCC), in cooperation with regional stakeholders, held a two-day workshop: Planning for Electrical Transmission Needs in the Upper Midwest. The workshop was the outgrowth of an effort to develop a forum and process for consideration of transmission options that strives for equitable allocation of benefits and impacts among all affected parties. The goal of this workshop was to provide a catalyst for an enhanced, inclusive process for transmission planning with participation of and acceptance by all affected stakeholders. Participants in the meeting included representatives of state and regional regulatory agencies, utilities and power generators, the wind industry, environmental and landowner interests, and other interested parties (see Attachment A for a list of meeting participants).

Kevin Bryan

2003-03-12T23:59:59.000Z

404

Transmission Rights and Market Power James Bushnell  

E-Print Network (OSTI)

of the transmission grid can advantage some competitors at the expense of others. In electricity markets around control of transmission paths. In electricity markets such as California's, even financial transmissionPWP-062 Transmission Rights and Market Power James Bushnell April, 1999 This paper is part

California at Berkeley. University of

405

Principles for interregional transmission expansion  

Science Conference Proceedings (OSTI)

In aiming to facilitate the siting of interregional transmission lines, some basic principles might include an approach where the Federal Energy Regulatory Commission uses a variety of tools to capture the value of new transmission, and thus increase the supply of interregional lines. There also may be opportunities for the Commission to work with localities to reduce resistance to new lines by means of economic incentives. Such a tack has the potential to be more efficient than fighting local opposition in the courts. (author)

Benjamin, Richard

2007-10-15T23:59:59.000Z

406

California/Transmission | Open Energy Information  

Open Energy Info (EERE)

California/Transmission California/Transmission < California Jump to: navigation, search CaliforniaTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database The electrical grid in California is part of the WestConnect Transmission Planning area and the California Transmission Planning Group. The desert southwest region of California belongs to the Southwest Area Transmission power grid and the northern region of the state belongs to the Sierra Subregional Planning Group. The SWAT provides the technical forum required to complete reliability assessments, develop joint business opportunities and accomplish

407

Perspective: Power Lines and Motor Vehicle Electronics  

Science Conference Proceedings (OSTI)

Recent news reports have suggested that the operation of automotive electronic systems (including sudden acceleration) could be affected by the electric and magnetic fields associated with power transmission lines. Based on electromagnetic fundamentals and knowledge of the levels of electric fields, magnetic fields and RF fields from transmission lines, one can evaluate the possibility of an interaction between these exposures and the electronic systems within automobiles, both electric and conventional.

2010-06-06T23:59:59.000Z

408

Transmission System Reliability Performance Metrics Requirements  

Science Conference Proceedings (OSTI)

Transmission availability has become the significant indicator of overall transmission system operational health, due to increased utilization of the transmission system, growth of deregulated energy wholesale markets, and decreased investment in new transmission assets. Availability trends reflect the increasing dependence upon transmission assets from a technical and market perspective. Presently availability metrics lack comparability due to the non-standardization of underlying data collection method...

2003-12-12T23:59:59.000Z

409

The Valley Group, Inc. CAT-1 TM Transmission Line Monitoring Systems  

E-Print Network (OSTI)

We wish to commend the CEC on its leadership role in exploring all facets of renewable energy, especially wind resource development and related transmission system issues. The Valley Group has been involved with numerous studies relating to wind farm transmission access, and is directly involved with several IEEE and CIGRE task force initiatives related to wind as it specifically relates to transmission line capacity. We are pleased to have this opportunity to share our findings with the commission. With regard to the workshop questions posed on physical limits of existing transmission facilities and methods to facilitate access to renewable resources, we wish to call your attention to some actual results observed at a utility in the southwest U.S. using Dynamic Line Rating technology to optimize access to wind farm energy production while ensuring transmission grid reliability, all at minimal cost to the utility and its ratepayers. The bottom line is that Dynamic Line Rating technology enables transmission system operators to utilize the natural correlation that exists between wind farm output and real (not assumed) transmission line capacity. This is not theorized, but rather has been proven and successfully implemented. We strongly recommend that CEC and CPUC take the time to fully understand Dynamic Line Rating

Commissioner John; L. Geesman

2004-01-01T23:59:59.000Z

410

A 16-channel heterodyne electron cyclotron emission radiometer on J-TEXT  

SciTech Connect

To study equilibrium temporal dynamics and the mechanisms of magnetohydrodynamic instabilities, a 16-channel heterodyne electron cyclotron emission (ECE) radiometer has been developed to view the J-TEXT tokamak from the low field side. The ECE radiometer detects second-harmonic extraordinary mode in the frequency band of 94-125 GHz which corresponds to resonances from 1.8 T to 2.2 T. This ECE system consists of an ECE transmission line, a radio frequency unit, and two 8-channel intermediate frequency units. An in situ blackbody calibration source is applied for system calibration by comparison of hot and cold sources in order to provide an absolute temperature measurement.

Yang, Z. J.; Zhuang, G.; Xiao, J. S.; Wang, Z. J. [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Key Laboratory of Fusion and Advanced Electromagnetic Technology Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Phillips, P. E.; Huang, H.; Rowan, W. L. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

2012-10-15T23:59:59.000Z

411

Transmission System SQRA Assessment Methods  

Science Conference Proceedings (OSTI)

Market conditions and increasingly stringent regulatory requirements have focused attention on metrics that quantify the Security, Quality, Reliability, and Availability (SQRA) of transmission systems. This report summarizes the state-of-the-art in performance metrics, provides four case studies of their use, and discusses future trends in reliability metrics, congestion metrics, and benchmarking.

2009-07-31T23:59:59.000Z

412

Underground Transmission Systems Reference Book  

Science Conference Proceedings (OSTI)

The Underground Transmission Systems Reference Book covers all stages of cable system design and operation, from initial planning studies to failure analysis. It contains contributions from many of the industry's experts and represents practices from all parts of the United States.

1993-03-01T23:59:59.000Z

413

Power superconducting power transmission cable  

DOE Patents (OSTI)

The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

Ashworth, Stephen P. (Cambridge, GB)

2003-01-01T23:59:59.000Z

414

Transmission Access Charge Informational Filing  

E-Print Network (OSTI)

of any new Participating Transmission Owner (“Participating TO”) during the proceeding six months or (2) changes to Transmission Revenue Requirements of any of the Participating TOs. 1 Because the Access Charges are determined through a formula rate mechanism, these semi-annual adjustments take place automatically. In the enclosed informational filing, the ISO is providing notice regarding the updated Access Charges that reflect the charges that will be in effect beginning January 1, 2002 in accordance with the formula rate. The adjusted charges are based on the modified Transmission Revenue Requirements, both High Voltage and Low Voltage as a result of: (1) the Offer of Settlement accepted by the Commission in Pacific Gas & Electric Company’s (“PG&E”) Docket No. ER01-66-000, (2) San Diego Gas and Electric Company’s supplemental surcharge accepted, subject to refund, in Docket No. ER01-3074-000, and (3) the annual adjustment to the Transmission Revenue Balancing Account (“TRBA”) of the Participating TOs. 1 Capitalized terms not otherwise defined herein are defined in the Master Definitions

unknown authors

2001-01-01T23:59:59.000Z

415

Boundary stabilization of transmission problems  

E-Print Network (OSTI)

We study the transmission problem in bounded domains with dissipative boundary conditions. Under some natural assumptions, we prove uniform bounds of the corresponding resolvents on the real axis at high frequency, and as a consequence, we obtain free of eigenvalues regions. As an application, we get exponential decay of the energy of the solutions of the correpsonding mixed boundary value problems.

Fernando Cardoso; Georgi Vodev

2009-10-20T23:59:59.000Z

416

Field Guide: Inspection of Transmission Line Grounding Systems  

Science Conference Proceedings (OSTI)

This EPRI report, one in a series of practical guides designed as reference aids for utility personnel working in the field, visually catalogs the various condition issues that commonly affect transmission line grounding systems. It presents photographs and short written descriptions of the conditions and lists associated causes, failure modes, and impacts.The downloadable PDF for this product is optimized for viewing on electronic devices such as tablets. For Android devices, Adobe ...

2013-11-25T23:59:59.000Z

417

Electron holography  

Science Conference Proceedings (OSTI)

... An electron hologram is a fringe modulated image containing the amplitude and phase information of an electron transparent object. ...

2013-01-08T23:59:59.000Z

418

Definition: Network Integration Transmission Service | Open Energy  

Open Energy Info (EERE)

Network Integration Transmission Service Network Integration Transmission Service Jump to: navigation, search Dictionary.png Network Integration Transmission Service Service that allows an electric transmission customer to integrate, plan, economically dispatch and regulate its network reserves in a manner comparable to that in which the Transmission Owner serves Native Load customers.[1] Related Terms transmission lines, transmission customer, transmission line, native load, smart grid References ↑ Glossary of Terms Used in Reliability Standards An inli LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ne Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Network_Integration_Transmission_Service&oldid=502560" Categories: Definitions

419

Closed loop computer control for an automatic transmission  

DOE Patents (OSTI)

In an automotive vehicle having an automatic transmission that driveably connects a power source to the driving wheels, a method to control the application of hydraulic pressure to a clutch, whose engagement produces an upshift and whose disengagement produces a downshift, the speed of the power source, and the output torque of the transmission. The transmission output shaft torque and the power source speed are the controlled variables. The commanded power source torque and commanded hydraulic pressure supplied to the clutch are the control variables. A mathematical model is formulated that describes the kinematics and dynamics of the powertrain before, during and after a gear shift. The model represents the operating characteristics of each component and the structural arrangement of the components within the transmission being controlled. Next, a close loop feedback control is developed to determine the proper control law or compensation strategy to achieve an acceptably smooth gear ratio change, one in which the output torque disturbance is kept to a minimum and the duration of the shift is minimized. Then a computer algorithm simulating the shift dynamics employing the mathematical model is used to study the effects of changes in the values of the parameters established from a closed loop control of the clutch hydraulic and the power source torque on the shift quality. This computer simulation is used also to establish possible shift control strategies. The shift strategies determined from the prior step are reduced to an algorithm executed by a computer to control the operation of the power source and the transmission.

Patil, Prabhakar B. (Detroit, MI)

1989-01-01T23:59:59.000Z

420

System for computer controlled shifting of an automatic transmission  

DOE Patents (OSTI)

In an automotive vehicle having an automatic transmission that driveably connects a power source to the driving wheels, a method to control the application of hydraulic pressure to a clutch, whose engagement produces an upshift and whose disengagement produces a downshift, the speed of the power source, and the output torque of the transmission. The transmission output shaft torque and the power source speed are the controlled variables. The commanded power source torque and commanded hydraulic pressure supplied to the clutch are the control variables. A mathematical model is formulated that describes the kinematics and dynamics of the powertrain before, during and after a gear shift. The model represents the operating characteristics of each component and the structural arrangement of the components within the transmission being controlled. Next, a close loop feedback control is developed to determine the proper control law or compensation strategy to achieve an acceptably smooth gear ratio change, one in which the output torque disturbance is kept to a minimum and the duration of the shift is minimized. Then a computer algorithm simulating the shift dynamics employing the mathematical model is used to study the effects of changes in the values of the parameters established from a closed loop control of the clutch hydraulic and the power source torque on the shift quality. This computer simulation is used also to establish possible shift control strategies. The shift strategies determine from the prior step are reduced to an algorithm executed by a computer to control the operation of the power source and the transmission.

Patil, Prabhakar B. (Detroit, MI)

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Efficiency Benefits of EHV AC Transmission and Overlays in Interregional Transmission Expansion Planning  

Science Conference Proceedings (OSTI)

In the United States, transmission expansion planning historically focused on addressing local utility transmission needs. In the mid-to-late 1990s, the focus shifted to encompass regional transmission expansion, primarily driven by Federal Energy Regulatory Commission (FERC) mandates on open transmission access and emergence of regional transmission organizations. In recent years, three drivers have elevated transmission expansion planning to a higher, interregional level. These drivers are the ...

2012-11-29T23:59:59.000Z

422

NREL: Transmission Grid Integration - Webinars  

NLE Websites -- All DOE Office Websites (Extended Search)

Webinars Webinars Want updates about future transmission grid integration webinars and publications? Join our mailing list. NREL periodically offers webinars on transmission grid integration topics to provide insight into its research. Explore the resources below to learn more. Upcoming Webinars Please check back. Details on future meetings and workshops will be posted as they are available. Past Webinars Results from The Western Wind and Solar Integration Study Phase 2: An examination of how wind and solar power affect operations, costs, and emissions from fossil-fueled generators Wednesday, September 25, 2013 at 12:00 EDT (10:00 MDT) The Western Wind and Solar Integration Study Phase 2 (WWSIS-2), launched in 2011, examines the potential impacts of up to 33% wind and solar energy

423

DOE Electricity Transmission System Workshop  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TRANSMISSION SYSTEM WORKSHOP TRANSMISSION SYSTEM WORKSHOP Mapping Challenges and Opportunities to Help Guide DOE R&D Investments over the Next Five Years DoubleTree Crystal City, 300 Army Navy Drive, Arlington, VA November 1-2, 2012 AGENDA Thursday, November 1, 2012 8:00-8:10 Welcome and Kickoff David Sandalow, Acting Undersecretary of Energy 8:10-8:30 Introduction to the Grid Tech Team (GTT), Vision, and Framework Distribution Workshop Summary Dr. Anjan Bose, Grid Tech Team Lead 8:30-8:50 OE Vision, Activities, and Issues Patricia A. Hoffman, Assistant Secretary for the Office of Electricity Delivery and Energy Reliability (OE) 8:50-9:10 EERE Vision, Activities, and Issues Dr. David Danielson, Assistant Secretary for the Office of Energy Efficiency and Renewable Energy (EERE)

424

transmission | OpenEI Community  

Open Energy Info (EERE)

21 21 Varnish cache server Home Groups Community Central Green Button Applications Developer Utility Rate FRED: FRee Energy Database More Public Groups Private Groups Features Groups Blog posts Content Stream Documents Discussions Polls Q & A Events Notices My stuff Energy blogs 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142235321 Varnish cache server transmission Home Kyoung's picture Submitted by Kyoung(155) Contributor 12 November, 2012 - 09:17 Legal Reviews are Underway BHFS Legal review permitting power plant roadmap transmission The legal review of the Regulatory Roadmap flowcharts and supporting content is well underway and will continue for the next several months with our legal team at [www.bhfs.com Brownstein Hyatt Farber and Schreck]. The

425

Midwest Transmission Workshop II Summary  

DOE Green Energy (OSTI)

OAK-B135 After introductions of all participants, Abby Arnold, RESOLVE, reviewed the purpose of the meeting and the agenda. The purpose of the workshop was to share the results of the Midwest Independent System Operator (MISO) scenario development for wind and other fuel sources and the corresponding implications for transmission throughout the MISO control area. The workshop agenda is included in Attachment A.

Kevin Bryan

2002-12-05T23:59:59.000Z

426

Guide for Transmission Line Grounding  

Science Conference Proceedings (OSTI)

Electrical utilities have a duty to provide effective grounding for managing steady-state and fault currents, whether near a large generating station or at a remote distribution pole ground. For transmission lines, this imperative is usually met with investment in overhead ground wires and grounding electrodes. Effective grounding at each tower improves reliability8212by providing low path impedance to lightning strokes8212and contributes to safety. However, the fundamental physical parameters in ground ...

2007-12-20T23:59:59.000Z

427

High current pulse transmission cable  

DOE Patents (OSTI)

This invention is comprised of a transmission cable for carrying high current pulses in which an even numbered plurality of electrical conductors surrounds a central ground conductor. Each electrical conductor is connected so that it at any instant in time it will carry current of opposite polarity to the polarity carried by adjacent conductors. This arrangement cancels practically all of the external fields generated by current in the conductors.

Parsons, W.M.

1990-09-28T23:59:59.000Z

428

Flexible and Strategic Transmission Planning  

Science Conference Proceedings (OSTI)

This update describes two separate but related planning frameworks developed for this project: 1) balancing of reliability and economics in transmission planning and 2) consideration of the need for operational flexibility in planning. Projects that improve reliability can also improve economics, and vice versa. The challenge is in achieving the reliability goals with as much economic benefit as possible, in other words, balancing the reliability and economic goals without compromising either. A method o...

2011-12-22T23:59:59.000Z

429

Coiled transmission line pulse generators  

DOE Patents (OSTI)

Methods and apparatus are provided for fabricating and constructing solid dielectric "Coiled Transmission Line" pulse generators in radial or axial coiled geometries. The pour and cure fabrication process enables a wide variety of geometries and form factors. The volume between the conductors is filled with liquid blends of monomers, polymers, oligomers, and/or cross-linkers and dielectric powders; and then cured to form high field strength and high dielectric constant solid dielectric transmission lines that intrinsically produce ideal rectangular high voltage pulses when charged and switched into matched impedance loads. Voltage levels may be increased by Marx and/or Blumlein principles incorporating spark gap or, preferentially, solid state switches (such as optically triggered thyristors) which produce reliable, high repetition rate operation. Moreover, these Marxed pulse generators can be DC charged and do not require additional pulse forming circuitry, pulse forming lines, transformers, or an a high voltage spark gap output switch. The apparatus accommodates a wide range of voltages, impedances, pulse durations, pulse repetition rates, and duty cycles. The resulting mobile or flight platform friendly cylindrical geometric configuration is much more compact, light-weight, and robust than conventional linear geometries, or pulse generators constructed from conventional components. Installing additional circuitry may accommodate optional pulse shape improvements. The Coiled Transmission Lines can also be connected in parallel to decrease the impedance, or in series to increase the pulse length.

McDonald, Kenneth Fox (Columbia, MO)

2010-11-09T23:59:59.000Z

430

A CRITICAL REVIEW OF WIND TRANSMISSION COST ESTIMATES FROM MAJOR TRANSMISSION PLANNING EFFORTS  

E-Print Network (OSTI)

in calculating the unit cost of wind energy transmissionimpacts of the cost of transmission for wind energy. Only inj = Transmission cost per unit of wind energy weighted by

Mills, Andrew; Wiser, Ryan; Porter, Kevin

2007-01-01T23:59:59.000Z

431

Gas dynamic aspects of silicon thin layers deposition using excitation of a free jet of the working gas mixture by an electron beam  

Science Conference Proceedings (OSTI)

A film of microcrystalline silicon ({mu}c-Si:H) deposited at low temperature is a promising material for thin-film silicon solar cells with high efficiency and high stability. To deposit silicon thin films with high deposition rate and high quality, a novel gas-jet deposition method has been developed. The paper is devoted to experimental and numerical study of the method from the gas dynamic point of view. A numerical model of the flow field of the working gas mixture in the device was developed that provides predictions of the film thickness distribution over the substrate surface and was found to describe the measured data satisfactory. The model may be used to optimize the operating parameters of the device.

Skovorodko, P. A.; Sharafutdinov, R. G.; Shchukin, V. G.; Konstantinov, V. O. [CJSC Institute of Plasma Chemical Technologies, 630090, Novosibirsk (Russian Federation) and Kutateladze Institute of Thermophysics, 630090, Novosibirsk (Russian Federation)

2012-11-27T23:59:59.000Z

432

Definition: Transmission Service | Open Energy Information  

Open Energy Info (EERE)

Service Service Jump to: navigation, search Dictionary.png Transmission Service Services provided to the Transmission Customer by the Transmission Service Provider to move energy from a Point of Receipt to a Point of Delivery.[1] Related Terms transmission lines, Transmission Customer, Transmission Service Provider, transmission line References ↑ Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Transmission_Service&oldid=480302" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

433

Arizona/Transmission/Summary | Open Energy Information  

Open Energy Info (EERE)

Arizona‎ | Transmission Arizona‎ | Transmission Jump to: navigation, search ArizonaTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Permitting at a Glance In Arizona, the state has the authority to site high-voltage transmission lines. A public service corporation would need to obtain a Certificate of Environmental Compatibility (CEC) from the Arizona Power Plant and Transmission Line Siting Committee that is "affirmed and approved" by the Arizona Corporation Commission (ACC). State Siting Act Arizona Revised Statute (A.R.S.)§ 40-360 et seq. State Preemptive Authority If the Transmission Line Siting Committee (TLSC) finds that compliance with local ordinances, master plan or regulation is unreasonably restrictive and compliance is not feasible in view of technology available, then the TLSC may grant a certificate.[1]

434

A Computer Package for Transmission Line Analysis  

Science Conference Proceedings (OSTI)

A computer program, LIGNE, has been developed as a comprehensive teaching aid for the section on transmission line theory in an electromagnetics course. The program assists the student in the analysis of transmission lines, enabling him to quickly assess ...

Georges-Andre Chaudron; Manfred Nachman

1987-11-01T23:59:59.000Z

435

Transmission Expansion Planning with Re-design  

E-Print Network (OSTI)

Expanding an electrical transmission network requires heavy investments ... Long term transmission expansion planning determines, over an horizon of 10 or more years, ... generation sites are usually far away from the consumption centers.

436

Wireless power transmission for medical applications  

E-Print Network (OSTI)

We studied the wireless power transmission capabilities of microwave through human skin-tissue. Microwave transmission through simulated human skins was tested with rectenna array as a power receiver located under the ...

Payne, Joshua E.

437

Estes-Flatiron Transmission Line Rebuild  

NLE Websites -- All DOE Office Websites (Extended Search)

Estes-Flatiron Transmission Line Rebuild Estes-Flatiron Transmission Line Rebuild Skip Navigation Links Transmission Functions Infrastructure projects Interconnection OASIS OATT Estes-Flatiron Transmission Line Rebuild Project Western Area Power Administration proposes to rebuild approximately 32 miles of double wood-pole structure 115-kilovolt transmission line that exists between Estes Park and Flatiron Reservoir in Larimer County, Colo. The proposal would remove 16 miles of transmission line, and modernize 16 miles to steel-pole double-circuit 115-kV transmission line. The reduction and modernizing of transmission lines will occur on Federal, state and private lands. The public parcels are administered by the Arapaho and Roosevelt National Forest, which is a cooperating agency in the project.

438

Langevin molecular dynamics derived from Ehrenfest dynamics  

E-Print Network (OSTI)

Stochastic Langevin molecular dynamics for nuclei is derived from the Ehrenfest Hamiltonian system (also called quantum classical molecular dynamics) in a Kac-Zwanzig setting, with the initial data for the electrons stochastically perturbed from the ground state and the ratio, $M$, of nuclei and electron mass tending to infinity. The Ehrenfest nuclei dynamics is approximated by the Langevin dynamics with accuracy $o(M^{-1/2})$ on bounded time intervals and by $o(1)$ on unbounded time intervals, which makes the small $\\mathcal{O}(M^{-1/2})$ friction and $o(M^{-1/2})$ diffusion terms visible. The initial electron probability distribution is a Gibbs density at low temperture, derived by a stability and consistency argument: starting with any equilibrium measure of the Ehrenfest Hamiltonian system, the initial electron distribution is sampled from the equilibrium measure conditioned on the nuclei positions, which after long time leads to the nuclei positions in a Gibbs distribution (i.e. asymptotic stability); by consistency the original equilibrium measure is then a Gibbs measure.The diffusion and friction coefficients in the Langevin equation satisfy the Einstein's fluctuation-dissipation relation.

Anders Szepessy

2007-12-21T23:59:59.000Z

439

Electron Microscopy Center  

NLE Websites -- All DOE Office Websites (Extended Search)

iTEAM iTEAM The in situ Transmission Electron Aberration Corrected Microscope (iTEAM) is a proposed project to develop a microscope with powerful capabilities for in situ studies of materials in their native environment. iTEAM will build on the success of the TEAM project by utilizing both spherical and chromatic aberration correction in an electron microscope to provide unprecedented capabilities to study materials in controlled environments of temperature, pressure, or fluidic states with the high-resolution in imaging, diffraction, and spectroscopy typical of electron probes. The capabilities of iTEAM will lead to new ways to understand the behavior of materials in native environments, with particular relevance to major energy initiatives such as catalysis, solar conversion, fuel cells, and batteries. In addition, iTEAM will provide new capabilities to understand organic/inorganic interfaces, functionalized nanoparticles, and biomaterials under natural conditions.

440

EEI/DOE Transmission Capacity Report  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TRANSMISSION CAPACITY: TRANSMISSION CAPACITY: PRESENT STATUS AND FUTURE PROSPECTS Eric Hirst Consulting in Electric-Industry Restructuring Bellingham, Washington June 2004 Prepared for Energy Delivery Group Edison Electric Institute Washington, DC Russell Tucker, Project Manager and Office of Electric Transmission and Distribution U.S. Department of Energy Washington, DC Larry Mansueti, Project Manager ii iii CONTENTS Page SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v LIST OF ACRONYMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii 1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. TRANSMISSION CAPACITY: DATA AND PROJECTIONS . . . . . . . . . . . . . . . . . . . 5 HISTORICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 CURRENT CONDITIONS . . . . . . .

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Flexible Transmission in the Smart Grid  

E-Print Network (OSTI)

low load levels there can be situations where the capacitive component of the transmission line causes voltage

Hedman, Kory Walter

2010-01-01T23:59:59.000Z

442

Alternative Transmission Technologies for Joint Planning Studies  

Science Conference Proceedings (OSTI)

This report describes a detailed analysis of joint transmission planning needs and capabilities, including an assessment of current research in the area. The report has value as a starting point and reference for transmission planners engaged in joint planning exercises because it focuses on technologies that could facilitate joint transmission planning of a bulk power grid. A joint planning exercise involves the collaboration of multiple transmission planning groups that may each have ...

2013-12-09T23:59:59.000Z

443

Average transmission probability of a random stack  

E-Print Network (OSTI)

The transmission through a stack of identical slabs that are separated by gaps with random widths is usually treated by calculating the average of the logarithm of the transmission probability. We show how to calculate the average of the transmission probability itself with the aid of a recurrence relation and derive analytical upper and lower bounds. The upper bound, when used as an approximation for the transmission probability, is unreasonably good and we conjecture that it is asymptotically exact.

Yin Lu; Christian Miniatura; Berthold-Georg Englert

2009-07-31T23:59:59.000Z

444

Directional Reactive Power Ground Plane Transmission  

Directional Reactive Power Ground Plane Transmission Technology Summary ... The invention can transmit electrical power through the surface of the ...

445

Hole burning with pressure and electric field: A window on the electronic structure and energy transfer dynamics of bacterial antenna complexes  

SciTech Connect

Light-harvesting (LH) complexes of cyclic (C{sub n}) symmetry from photosynthetic bacteria are studied using absorption and high pressure- and Stark-hole burning spectroscopies. The B800 absorption band of LH2 is inhomogeneously broadened while the B850 band of LH2 and the B875 band of the LH1 complex exhibit significant homogeneous broadening due to ultra-fast inter-exciton level relaxation. The B800{r_arrow}B850 energy transfer rate of ({approximately}2 ps){sup {minus}1} as determined by hole burning and femtosecond pump-probe spectroscopies, is weakly dependent on pressure and temperature, both of which significantly affect the B800-B850 energy gap. The resilience is theoretically explained in terms of a modified Foerster theory with the spectral overlap provided by the B800 fluorescence origin band and weak vibronic absorption bands of B850. Possible explanations for the additional sub-picosecond relaxation channel of B800 observed with excitation on the blue side of B800 are given. Data from pressure and temperature dependent studies show that the B800 and B850 bacteriochlorophyll a (BChl a) molecules are weakly and strongly excitonically coupled, respectively, which is consistent with the X-ray structure of LH2. The B875 BChl a molecules are also strongly coupled. It is concluded that electron-exchange, in addition to electrostatic interactions, is important for understanding the strong coupling of the B850 and B875 rings. The large linear pressure shifts of {approximately}{minus}0.6 cm{sup {minus}1}/MPa associated with B850 and B875 can serve as important benchmarks for electronic structure calculations.

Wu, H.M.

1999-02-12T23:59:59.000Z

446

Exploration of Resource and Transmission Expansion Decisions  

E-Print Network (OSTI)

Exploration of Resource and Transmission Expansion Decisions in the Western Renewable Energyin.S. Department of Energy, Office of Electricity Delivery and Energy Reliability, Permitting, Siting and Analysis Division #12;Resource and Transmission ExpansionResource and Transmission Expansion Decisions in WREZ

447

Transportation Center Seminar........ "Proactive Transmission Planning in  

E-Print Network (OSTI)

Transportation Center Seminar........ "Proactive Transmission Planning in Electricity Networks of the biggest problems of actual power-systems transmission planning is its reactive nature. We formulate-systems transmission planning, generation investment, and market operation decisions and propose a methodology to solve

Bustamante, Fabián E.

448

The real problem with Merchant transmission  

SciTech Connect

Current regulatory policy distinguishes transmission investments that have primarily economic benefits from those that primarily enhance reliability. But no such dichotomy exists; congestion and reliability are inter-related in complex ways. Thus, solving the transmission investment problem is more complex than ''fixing'' merchant transmission; investment in the grid must be treated as a systems problem. (author)

Blumsack, Seth; Lave, Lester B.; Ilic, Marija

2008-03-15T23:59:59.000Z

449

Feasibility study for mega-electron-volt electron beam tomography  

SciTech Connect

Electron beam tomography is a promising imaging modality for the study of fast technical processes. But for many technical objects of interest x rays of several hundreds of keV energy are required to achieve sufficient material penetration. In this article we report on a feasibility study for fast electron beam computed tomography with a 1 MeV electron beam. The experimental setup comprises an electrostatic accelerator with beam optics, transmission target, and a single x-ray detector. We employed an inverse fan-beam tomography approach with radiographic projections being generated from the linearly moving x-ray source. Angular projections were obtained by rotating the object.

Hampel, U. [Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden (Germany); AREVA Endowed Chair of Imaging Techniques in Energy and Process Engineering, Technische Universitaet Dresden, 01062 Dresden (Germany); Baertling, Y.; Hoppe, D. [Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden (Germany); Kuksanov, N.; Fadeev, S.; Salimov, R. [Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Science, Lavrentiev av. 11, Novosibirsk 630090 (Russian Federation)

2012-09-15T23:59:59.000Z

450

Pulse shaping with transmission lines  

DOE Patents (OSTI)

A method and apparatus for forming shaped voltage pulses uses passive reflection from a transmission line with nonuniform impedance. The impedance of the reflecting line varies with length in accordance with the desired pulse shape. A high voltage input pulse is transmitted to the reflecting line. A reflected pulse is produced having the desired shape and is transmitted by pulse removal means to a load. Light activated photoconductive switches made of silicon can be utilized. The pulse shaper can be used to drive a Pockels cell to produce shaped optical pulses.

Wilcox, R.B.

1985-08-15T23:59:59.000Z

451

Pulse shaping with transmission lines  

DOE Patents (OSTI)

A method and apparatus for forming shaped voltage pulses uses passive reflection from a transmission line with nonuniform impedance. The impedance of the reflecting line varies with length in accordance with the desired pulse shape. A high voltage input pulse is transmitted to the reflecting line. A reflected pulse is produced having the desired shape and is transmitted by pulse removal means to a load. Light activated photoconductive switches made of silicon can be utilized. The pulse shaper can be used to drive a Pockels cell to produce shaped optical pulses.

Wilcox, Russell B. (Oakland, CA)

1987-01-01T23:59:59.000Z

452

The role of transmission investment in the coordination between generation and transmission  

E-Print Network (OSTI)

generation and transmission of electricity into distinct modules. The governance structure of transmission the governance of electricity transmission assets influences the implementation of power flow management. Finally to coordinate generation and transmission of electricity is in real organizations. 1 Assistant Professors

Paris-Sud XI, Université de

453

Application of EPRI's Transmission Services Costing Framework to the Development of Open Access Transmission Tariffs  

Science Conference Proceedings (OSTI)

Public utilities in the United States are expected to provide transmission services and ancillary services to eligible customers. This report documents how Centerior Energy Corporation developed a network integration transmission service tariff, a point-to-point transmission service tariff, and four ancillary services tariffs by applying EPRI's Transmission Services Costing Framework.

1996-03-09T23:59:59.000Z

454

Impedance matched joined drill pipe for improved acoustic transmission  

DOE Patents (OSTI)

An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

Moss, William C. (San Mateo, CA)

2000-01-01T23:59:59.000Z

455

SunZia Southwest Transmission Project Comments  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SunZia Southwest Transmission Project SunZia Southwest Transmission Project Comments Provided to the US Department of Energy Office of Electricity Delivery and Energy Reliability Request for Information Relating to the Permitting of Transmission Lines Submitted as of March 28, 2012 2 1.0 Background. SunZia Southwest Transmission Project (SunZia or the Project) is a joint development effort currently underway in Arizona and New Mexico. The Project definition includes licensing, permitting, financing, constructing and operating up to two 500 kilovolt alternating current (AC) transmission lines and up to five interconnecting substations.

456

California/Transmission/Roadmap | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » California/Transmission/Roadmap < California‎ | Transmission Jump to: navigation, search CaliforniaTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database The flowcharts listed below cover the major requirements for developing transmission - both interconnects and major, multi-jurisdictional lines - including, land access, siting, and relevant environmental considerations.

457

Colorado/Transmission/Roadmap | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Colorado/Transmission/Roadmap < Colorado‎ | Transmission Jump to: navigation, search ColoradoTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database The flowcharts listed below cover the major requirements for developing transmission - both interconnects and major, multi-jurisdictional lines - including, land access, siting, and relevant environmental considerations.

458

Arizona/Transmission/Roadmap | Open Energy Information  

Open Energy Info (EERE)

Roadmap Roadmap < Arizona‎ | Transmission Jump to: navigation, search ArizonaTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database The flowcharts listed below cover the major requirements for developing transmission - both interconnects and major, multi-jurisdictional lines - including, land access, siting, and relevant environmental considerations. Reading the Roadmap The flowcharts are divided into General, Federal, and State columns to allow for ease of use. To use the flowcharts, start with General Flowchart for Section 8: Transmission. The General Flowchart will lead you to the

459

Electron Microprobe  

Science Conference Proceedings (OSTI)

Electron Microprobe. ... The JEOL JXA-8600 is a conventional hairpin filament thermal emission electron microprobe that is more than 20 years old. ...

2012-10-01T23:59:59.000Z

460

National Transmission Grid Study: 2002 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Grid Study: 2002 National Transmission Grid Study: 2002 National Transmission Grid Study: The National Energy Policy Plan directed the U.S. Department of Energy (DOE)...

Note: This page contains sample records for the topic "dynamic transmission electron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

California/Transmission/Local Regulations | Open Energy Information  

Open Energy Info (EERE)

CaliforniaTransmissionLocal Regulations < California | Transmission Jump to: navigation, search CaliforniaTransmissionHeader.png Roadmap Agency Links Local Regulations State...

462

Transmission Forum Agenda - February 2012 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Forum Agenda - February 2012 Transmission Forum Agenda - February 2012 FINAL AGENDA - Transmission Forum Feb 2012 (Denver) 020212.pdf More Documents & Publications DOE...

463

PP-76 The Vermont Electric Transmission Company | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6 The Vermont Electric Transmission Company PP-76 The Vermont Electric Transmission Company Presidential Permit authorizing The Vermont Electric Transmission Company to construct,...

464

PP-76-1 The Vermont Electric Transmission Company | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

76-1 The Vermont Electric Transmission Company PP-76-1 The Vermont Electric Transmission Company Presidential Permit authorizing The Vermont Electric Transmission Company to...

465

EMISSION AND TRANSMISSION NOISE PROPAGATION IN POSITRON EMISSION COMPUTED TOMOGRAPHY  

E-Print Network (OSTI)

26-29, 1979 EMISSION AND TRANSMISSION NOISE PROPAGATION INLBL-9783 EMISSION AND TRANSMISSION NOISE PROPAGATION INl·. LBL-9783 EMISSION AND TRANSMISSION NOISE PROPAGATION IN

Gullberg, G.T.

2010-01-01T23:59:59.000Z

466

Comments of New England Electric Transmission Corporation on...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

out of time and comments of New England Electric Transmission Corporation, New England Hydro-Transmission Electric Company, Inc. and New England Hydro-Transmission Corporation and...

467

Automated manual transmission mode selection controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI)

1999-11-09T23:59:59.000Z

468

Automated manual transmission shift sequence controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both, an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI); Reed, Richard G. (Royal Oak, MI); Rausen, David J. (Denver, CO)

2000-02-01T23:59:59.000Z

469

Colorado/Transmission/Summary | Open Energy Information  

Open Energy Info (EERE)

Colorado/Transmission/Summary Colorado/Transmission/Summary < Colorado‎ | Transmission Jump to: navigation, search ColoradoTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Permitting at a Glance In Colorado, local governments (counties and municipalities) have the authority to site high-voltage transmission lines. The State's authority in siting is limited to a backstop appeal process, by which utilities may submit an appeal to local government decisions to the Colorado Public Utilities Commission (CPUC) for review and resolution. State Siting Act None State Preemptive Authority The CPUC has backstop authority only. If a permit is denied by the local government, the applicant may appeal to the CPUC if certain conditions are met (CRS 29-20-108).

470

Idaho/Transmission/Roadmap | Open Energy Information  

Open Energy Info (EERE)

Idaho/Transmission/Roadmap Idaho/Transmission/Roadmap < Idaho‎ | Transmission Jump to: navigation, search IdahoTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database The flowcharts listed below cover the major requirements for developing transmission - both interconnects and major, multi-jurisdictional lines - including, land access, siting, and relevant environmental considerations. Reading the Roadmap The flowcharts are divided into General, Federal, and State columns to allow for ease of use. To use the flowcharts, start with General Flowchart for Section 8: Transmission. The General Flowchart will lead you to the

471

Idaho/Transmission/Summary | Open Energy Information  

Open Energy Info (EERE)

Idaho‎ | Transmission Idaho‎ | Transmission Jump to: navigation, search IdahoTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Permitting at a Glance In Idaho, the state's siting authority is limited to siting approvals on state property, and high voltage transmission lines (115kV or greater) within a National Interstate Electric Transmission Corridor (NIETC). Under these circumstances a Route Permit would be required by the Idaho Public Utilities Commission (IPUC); however, no such corridors have been designated and therefore the process has not been tested. Local governments

472

Open Access Transmission and Renewable Energy Technologies  

Science Conference Proceedings (OSTI)

In April 1996, the Federal Regulatory Commission (PERC) approved Orders 888 and 889 and released a draft rule for public comment on capacity reservation tariffs (CRTs). Order No. 888 requires electric utilities to file transmission tariffs that would allow transmission access to third parties who want to conduct wholesale transactions, and Order No. 889 requires transmission-owning utilities to set up open access, same-time information systems (OASIS), using commercial software and Internet protocols. This paper discusses these Orders in detail, as well as some of the issues before FERC with implications for renewables, which include: transmission pricing; transmission terms and conditions; reassignment of transmission capacity; defining state and FERC jurisdiction over transmission and distribution; the pricing of ancillary services; and the adoption and implementation of independent system operators.

Porter, K.

1996-09-01T23:59:59.000Z

473

Renewable Resource Integration Project - Scoping Study of Strategic Transmission, Operations, and Reliability Issues  

Science Conference Proceedings (OSTI)

California is on a path to increase utilization of renewable resources. California will need to integrate approximately 30,000 megawatts (MW) of new renewable generation in the next 20 years. Renewable resources are typically located in remote locations, not near the load centers. Nearly two/thirds or 20,000 MW of new renewable resources needed are likely to be delivered to Los Angeles Basin transmission gateways. Integration of renewable resources requires interconnection to the power grid, expansion of the transmission system capability between the backbone power grid and transmission gateways, and increase in delivery capacity from transmission gateways to the local load centers. To scope the transmission, operations, and reliability issues for renewables integration, this research focused on the Los Angeles Basin Area transmission gateways where most of new renewables are likely. Necessary actions for successful renewables integration include: (1) Expand Los Angeles Basin Area transmission gateway and nomogram limits by 10,000 to 20,000 MW; (2) Upgrade local transmission network for deliverability to load centers; (3) Secure additional storage, demand management, automatic load control, dynamic pricing, and other resources that meet regulation and ramping needed in real time operations; (4) Enhance local voltage support; and (5) Expand deliverability from Los Angeles to San Diego and Northern California.

Eto, Joseph; Budhraja, Vikram; Ballance, John; Dyer, Jim; Mobasheri, Fred; Eto, Joseph

2008-07-01T23:59:59.000Z

474

Precision cutting of nanotubes with a low-energy electron beam  

lective damage has been induced in transmission electron ... During cutting, the SEM was operated in line scan mode at maximum magni?cation s1063d, ...

475

L1, Formation of Structural Defects in AlGaN/GaN High Electron ...  

Science Conference Proceedings (OSTI)

Transmission electron microscope (TEM) cross sectional image has shown that electrical degradation is closely related to structural damage in the GaN cap and  ...

476

End-use load control for power system dynamic stability enhancement  

SciTech Connect

Faced with the prospect of increasing utilization of the transmission and distribution infrastructure without significant upgrade, the domestic electric power utility industry is investing heavily in technologies to improve network dynamic performance through a program loosely referred to as Flexible AC Transmission System (FACTS). Devices exploiting recent advances in power electronics are being installed in the power system to offset the need to construct new transmission lines. These devices collectively represent investment potential of several billion dollars over the next decade. A similar development, designed to curtail the peak loads and thus defer new transmission, distribution, and generation investment, falls under a category of technologies referred to as demand side management (DSM). A subset of broader conservation measures, DSM acts directly on the load to reduce peak consumption. DSM techniques include direct load control, in which a utility has the ability to curtail specific loads as conditions warrant. A novel approach has been conceived by Pacific Northwest National Laboratory (PNNL) to combine the objectives of FACTS and the technologies inherent in DSM to provide a distributed power system dynamic controller. This technology has the potential to dramatically offset major investments in FACTS devices by using direct load control to achieve dynamic stability objectives. The potential value of distributed versus centralized grid modulation has been examined by simulating the western power grid under extreme loading conditions. In these simulations, a scenario is analyzed in which active grid stabilization enables power imports into the southern California region to be increased several hundred megawatts beyond present limitations. Modeling results show distributed load control is up to 30 percent more effective than traditional centralized control schemes in achieving grid stability.

Dagle, J.E.; Winiarski, D.W.; Donnelly, M.K.

1997-02-01T23:59:59.000Z

477

Extracting physically interpretable data from electron energy-loss spectra.  

SciTech Connect

Principal component analysis is routinely applied to analyze data sets in electron energy-loss spectroscopy (EELS). We show how physically meaningful spectra can be obtained from the principal components using a knowledge of the scattering of the probe electron and the geometry of the experiment. This approach is illustrated by application to EELS data for the carbon K edge in graphite obtained using a conventional transmission electron microscope. The effect of scattering of the probe electron is accounted for, yielding spectra which are equivalent to experiments using linearly polarized X-rays. The approach is general and can also be applied to EELS in the context of scanning transmission electron microscopy.

Witte, C.; Zaluzec, N. J.; Allen, L. J.; Materials Science Division; Univ. of Melbourn

2010-10-30T23:59:59.000Z

478

THz Dynamic Nuclear Polarization NMR  

E-Print Network (OSTI)

Dynamic nuclear polarization (DNP) increases the sensitivity of nuclear magnetic resonance (NMR) spectroscopy by using high frequency microwaves to transfer the polarization of the electrons to the nuclear spins. The ...

Nanni, Emilio Alessandro