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1

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

2

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...

3

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

4

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

5

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...

6

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.

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

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

9

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

10

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.

11

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

12

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

13

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

14

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

15

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

16

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

17

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

18

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

19

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

20

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

22

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

23

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

24

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

25

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.

26

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 »

27

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 (s) 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 DOEs 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

28

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

29

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

30

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

31

NIST: Ultraviolet Photoemission Electron Microscopy  

Science Conference Proceedings (OSTI)

Ultraviolet Photoemission Electron Microscopy. Summary: Ultraviolet photoemission electron microscopy is used to study ...

2012-11-19T23:59:59.000Z

32

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

33

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

34

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

35

Metrology Electron Microscopy  

Science Conference Proceedings (OSTI)

Metrology Electron Microscopy. Technical Contact: Joseph (Joe) Fu. 301-975-3795. Figure 1. SRM 484f Sample and its Micrograph. ...

2011-10-28T23:59:59.000Z

36

BNL | CFN: Electron Microscopy  

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

and chemistry at the atomic scale is crucial to modern materials science and nanotechnology. Advanced electron microscopy can provide the fundamental knowledge that will...

37

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

38

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...

39

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...

40

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...

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Electron Microscopy Center  

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

Acknowledgment Acknowledgment EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers Acknowledgment Please acknowledge your use of the EMC in your publications and presentations with the following acknowledgment statement: The electron microscopy was accomplished at the Electron Microscopy Center at Argonne National Laboratory, a U.S. Department of Energy Office of Science Laboratory operated under Contract No. DE-AC02-06CH11357 by UChicago Argonne, LLC.

42

Electron Microscopy Center  

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

SAMM SAMM EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers Sub-Ångstrom Microscopy and Microanalysis Facility In order to meet the scientific challenges of the future, the EMC has built a new state-of-the-art laboratory space for advanced electron microscopy. The new building has been designed to provide next- generation science with an operating environment that cannot be attained by renovating existing facilities. The EMC staff learned as much as possible from similar efforts around the world, including the SuperSTEM building at Daresbury, the Triebenberg Special Laboratory, the AML at Oak Ridge National Laboratory, the new NIST building, and various facilities for nanoscience.

43

Electron Microscopy Center  

NLE Websites -- All DOE Office Websites

Laboratory Laboratory Electron Microscopy Center Argonne Home > EMC > EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers An Office of Science User Facility The Electron Microscopy Center (EMC) at Argonne National Laboratory develops and maintains unique capabilities for electron beam characterization and applies those capabilities to solve materials problems. The EMC staff carry out research with collaborators and users from Argonne, universities, and other laboratories. The expertise and facilities of the EMC additionally serve a group of national and international researchers. The EMC emphasizes three major areas: materials research, technique and instrumentation development, and operation as a national research facility. Research by EMC personnel includes microscopy based studies in high Tc superconducting materials, irradiation effects in metals and semiconductors, phase transformations, and processing related structure and chemistry of interfaces in thin films.

44

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

45

Electron Microscopy Center  

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

An Office of Science User Facility An Office of Science User Facility The Electron Microscopy Center (EMC) at Argonne National Laboratory develops and maintains unique capabilities for electron beam characterization and applies those capabilities to solve materials problems. The EMC staff carry out research with collaborators and users from Argonne, universities, and other laboratories. The expertise and facilities of the EMC additionally serve a group of national and international researchers. The EMC emphasizes three major areas: materials research, technique and instrumentation development, and operation as a national research facility. Research by EMC personnel includes microscopy based studies in high Tc superconducting materials, irradiation effects in metals and semiconductors, phase transformations, and processing related structure and chemistry of interfaces in thin films.

46

Electron Microscopy Center  

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

Training Training EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers User Training Prior Training in Electron Microscopy: People who wish to operate TEMs must have at least one college-level course in TEM with a lab component or previous TEM experience. The college course can't be one in which TEM was just one of many topics. For researchers who lack academic training and/or practical experience in electron microscopy, we suggest the short courses in TEM at the Hooke College of Applied Sciences, and the hands-on TEM courses at Northwestern University or the University of Chicago or Northern Illinois University.

47

Electron Microscopy Center  

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

Overview Overview The mission of the Electron Microscopy Center (EMC) is to: Conduct materials research using advanced microstructural characterization methods; Maintain unique resources and facilities for scientific research for the both the Argonne National Laboratory and national scientific community. Develop and expand the frontiers of microanalysis by fostering the evolution of synergistic state-of-the-art resources in instrumentation, techniques and scientific expertise; The staff members of the EMC carry out their own research as well as participate in collaborative programs with other scientists at Argonne National Laboratory as well as researchers, educators and students worldwide. The Electron Microscopy Center (EMC) at Argonne National Laboratory develops and maintains unique capabilities for electron beam characterization and applies those capabilities to solve materials problems. The EMC staff perform collaborative research with members of other Divisions at Argonne National Laboratory and with collaborators from universities and other laboratories. The expertise and facilities of the EMC additionally serve a group of national and international researchers. The EMC emphasizes three major areas: materials research, technique and instrumentation development, and operation as a national research facility. Research by EMC personnel includes microscopy based studies in high Tc superconducting materials, irradiation effects in metals and semiconductors, phase transformations, and processing related structure and chemistry of interfaces in thin films.

48

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

49

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.

50

Advanced Developments in Electron Microscopy  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, Materials Science & Technology 2011. Symposium, Advanced Developments in Electron Microscopy. Sponsorship, MS&T...

51

Spectroscopic imaging in electron microscopy  

Science Conference Proceedings (OSTI)

In the scanning transmission electron microscope, multiple signals can be simultaneously collected, including the transmitted and scattered electron signals (bright field and annular dark field or Z-contrast images), along with spectroscopic signals such as inelastically scattered electrons and emitted photons. In the last few years, the successful development of aberration correctors for the electron microscope has transformed the field of electron microscopy, opening up new possibilities for correlating structure to functionality. Aberration correction not only allows for enhanced structural resolution with incident probes into the sub-angstrom range, but can also provide greater probe currents to facilitate mapping of intrinsically weak spectroscopic signals at the nanoscale or even the atomic level. In this issue of MRS Bulletin, we illustrate the power of the new generation of electron microscopes with a combination of imaging and spectroscopy. We show the mapping of elemental distributions at atomic resolution and also the mapping of electronic and optical properties at unprecedented spatial resolution, with applications ranging from graphene to plasmonic nanostructures, and oxide interfaces to biology.

Pennycook, Stephen J [ORNL; Colliex, C. [Universite Paris Sud, Orsay, France

2012-01-01T23:59:59.000Z

52

Electron Microscopy Center  

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

Submit an EMC Proposal Submit an EMC Proposal EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers Submit an EMC Proposal EMC Proposal Submission Deadline Dates for FY2014: November 1, 2013 March 7, 2014 July 11, 2014 Is your proposal a multi-facility proposal? In other words, do you intend to submit proposals to EMC and APS or CNM for your research project? If your answer is "yes," go now to the Proposal Gateway.

53

Electron Microscopy Center  

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

EMC Users Committee EMC Users Committee EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers EMC Users Committee An EMC Users Committee has been organized to enhance communication between the user community and the EMC. While the EMC relies on and encourages strong interaction among its users and between its staff and users, the Users Committee provides an additional formal mechanism for user input into EMC planning and operations to ensure that users' needs and concerns are addressed.

54

Electron Microscopy Center  

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

End-of-Proposal Report End-of-Proposal Report EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers End-of-Proposal Report In accordance with the User Agreement, please provide the EMC with the following information when your proposal expires (one year after its acceptance date or when the experiments end, whichever is sooner). A research summary/progress report using these two templates:

55

Electron Microscopy Center  

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

Becoming a User Becoming a User EMC Home Overview Personnel Resources Highlights Publications Visit EMC Contact Info Information for Users Becoming a User Submit a Proposal End-of-Proposal Report Acknowledgment User Training User Safety User Status Instrument Access User Committee User Meetings Data Storage Policy Visiting the EMC Instrument Calendars Info for EMC Staff SÅMM Facility TEAM Project Microscopy Links Argonne Facilities DOE/BES Facilities DOE/BES BES Electron Beam Microcharacterization Centers Procedure to Become a User at the EMC 1. Summary All users have to fulfill certain requirements before access to the EMC can be granted. The following list provides short descriptions of the requirements. Details can be found on this page and via the relevant links at the left. Register for access to Argonne's scientific user facilities (or update your user registration information).

56

Electron Microscopy Center  

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

General Information for EMC Users General Information for EMC Users The Electron Microscopy Center (EMC) is an Office of Science User Facility operated for the U.S. Department of Energy Office of Science by Argonne National Laboratory. It is one of three scientific user facilities for electron beam microcharacterization and one of several National User Facilities located at Argonne National Laboratory. As a scientific user facility, the EMC supports user-accessible instruments (Resources) for high spatial resolution microanalysis, field imaging, nanoscale structural characterization, nanoscale fabrication and manipulation, and unique in situ studies of materials under the influence of ion-beam irradiation. These capabilities are used in a diverse variety of research areas to address grand challenge scientific questions encompassing, for example, energy-related studies, biology, astrophysics, archaeology, superconductivity, nanotechnology, environmental engineering, tribology, and ferroelectricity. The research is performed both by users and by EMC staff. While many users work independently, the most challenging research activities require extensive contributions from EMC staff.

57

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

58

Scanning Electron Microscopy  

Science Conference Proceedings (OSTI)

... Bob Gordon of Hitachi explains that the electrons are produced by a tungsten filament, just like in an incandescent light bulb, but since the sample ...

2013-12-06T23:59:59.000Z

59

Scanning Electron Microscopy (SEM)  

Science Conference Proceedings (OSTI)

...The scanning electron microscope provides a valuable combination of high resolution imaging, elemental analysis, and recently, crystallographic analysis: Imaging of features as small as sim 10 nm or less, roughly 100 times smaller than can be seen with...

60

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.

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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...

62

NCEM National Center for Electron Microscopy: Links  

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

National Laboratory, Center for Materials Research Brookhaven National Laboratory, Electron Microscopy Program Sites of Interest to the Microscopy Community The Microscopy...

63

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.

64

Electron Microscopy Center  

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

CM30T TEM CM30T TEM Instrument capabilities: Instrument specifications: Accelerating voltages: 100-300 kV LaB6 emitter Resolution (at 300 kV): ~ 0.25 nm point; ~ 0.14 nm line Minimum probe size: ~ 9 nm Operating modes: CTEM, CBED, SAED, light element XEDS CCD camera: 1 Mp, 14 bits, AVI capture possible at 15 fps Specimen holders: Double Tilt (+/- 60 degrees alpha, +/- 30 degrees beta): with Be cup for XEDS liquid nitrogen cooled (96 K) with Be cup heating (1270 K) Tilt/rotate (+/- 60 degrees alpha, rotation 360 degrees) Single Tilt (+/- 60 degrees alpha) Typical experiments (examples): Quantitative XEDS Morphological and diffraction contrast studies of defects In situ heating & cooling studies Electron crystallography Weak beam studies of defects This page can be downloaded here as an Adobe PDF file.

65

Electron Microscopy Center  

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

FEI Tecnai F20ST TEM/STEM FEI Tecnai F20ST TEM/STEM Instrument capabilities: Instrument specifications: Accelerating voltages: 80-200 kV Schottky FEG emitter Resolution (at 200 kV): ~0.24 nm point; ~0.1 nm line; probe size ~0.2-1 nm Operating modes: CTEM, STEM (BF/ADF, HAADF), CBED, SAED, light element XEDS, EELS, spectrum imaging, energy-filtered imaging (EFI), Lorentz magnetic imaging (LMI), electron holographic imaging (EHI), other computationally-mediated modes. On-axis CCD camera: 16 Mp, 16 bits, 61x61 mm chip size. EMC-owned specimen holders: Double Tilt (+/- 40 degrees alpha, +/- 30 degrees beta): with Be cup for XEDS liquid nitrogen cooled (96 K) with Be cup heating (1270 K) In-plane magnetic field (tilt +/- 40 degrees alpha) Liquid He cooled (tilt +/- 40 degrees alpha, rotate 360 degrees)

66

Electron microscopy of ceramic superconductors  

SciTech Connect

The critical current Jc is at least as important as Tc (transition temperature) for applications in superconducting materials. Jc is strongly dependent on microstructure and, in consequence, electron microscopy will continue to be important in the development of practical ceramic superconductors. We will review the progress that has been made over the past year or so in studying the superconductors by electron microscopy techniques of all kinds--conventional, high resolution, analytical, etc. A thorough review is impossible but a bibliography is available, as well as two special issues of Journals. 25 refs., 9 figs.

Mitchell, T.E.; Roy, T.

1988-01-01T23:59:59.000Z

67

Electron Microscopy of Carbon Nanotube Composites  

Science Conference Proceedings (OSTI)

Electron Microscopy of Carbon Nanotube Composites. Summary: Carbon nanomaterials such as carbon nanotubes (CNTs ...

2013-07-01T23:59:59.000Z

68

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

69

Los Alamos: MST-MTM: EML: Electron Microscopy Laboratory  

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

Electron Microscopy Laboratory, MST-6 Electron Microscopy Laboratory, MST-6 MST-6 Home Home In the MSL FEI Tecnai F30 Analytical TEM/STEM JEOL 6300FXV High Resolution SEM JEOL 3000F High Resolution Transmission Electron Microscope Philips XL30 F Scanning Electron Microscope & Orientation Imaging System Phillips CM30 Transmission Electron Microscope In the Sigma Building JEOL 840 EPMA with Wavelength Dispersive Spectroscopy FEI Strata DB235 FIB/SEM FEI XL30 Environmental Scanning Electron Microscope & Orientation Imaging System CONTACTS Bob Field 665.3938 Pat Dickerson 665.3036 Rob Dickerson 667.6337 Rod McCabe 606.1649 The Electron Microscopy Laboratory's Capabilities The Electron Microscopy Laboratory's Capabilities The Electron Microscopy Laboratory (EML) is part of MST-6, the Materials Technology - Metallurgy Group within the Materials Science and Technology Division at Los Alamos National Laboratory. It is a facility dedicated to the characterization of materials primarily through imaging, chemical, and crystallographic analyses of material microstructures with several electron and ion beam instruments. Accessory characterization techniques and equipment include energy dispersive x-ray analysis (EDS), wavelength dispersive x-ray analysis (WDS), electron backscatter diffraction (EBSD) and orientation imaging microscopy (OIM), and electron energy loss spectroscopy (EELS).

70

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,...

71

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

72

Electron Microscopy (EM, TEM, SEM, STEM) Information at ...  

Science Conference Proceedings (OSTI)

... Electron holography. Electron Microscopy of Carbon Nanotube Composites. Environmental Scanning Electron Microscope. ...

2010-10-05T23:59:59.000Z

73

Grand Opening Slated for Electron Microscopy Facility  

Science Conference Proceedings (OSTI)

4 days ago ... The Ohio State University Center for Electron Microscopy and Analysis ... There are also two X-ray diffractometer (XRD) systems, facilities for...

74

MML Microscopy Facility  

Science Conference Proceedings (OSTI)

The MML Electron Microscopy Facility consists of three transmission electron microscopes (TEM), three scanning electron microscopes (SEM), a ...

2013-06-11T23:59:59.000Z

75

NCEM National Center for Electron Microscopy: Becoming an NCEM User  

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

New Research New Research Gallery Microscopy Links Becoming an NCEM User Step 1: Submit a proposal Step 2: Before you begin your research Step 3: Instrument qualification Step 4: Accessing NCEM facilities and performing research Step 1: Submit a proposal Deadlines for new proposals are March 15, June 15, September 15, December 15. Access to NCEM facilities is granted to researchers whose proposals are accepted by the NCEM proposal review committee. NCEM users are expected to have a strong background in transmission electron microscopy, and submitted proposals should include evidence of prior electron microscopy experience by the intended operator. Researchers who do not have sufficient experience in electron microscopy may be able to use NCEM facilities through a collaborative project.

76

Automated Electron Microscopy Film Scanner  

Renewable Energy; Environmental Technologies. ... film meets high performance specifications at higher electron energies while digital cameras do not; ...

77

Neural network characterization of scanning electron microscopy  

Science Conference Proceedings (OSTI)

A scanning electron microscope (SEM) is a sophisticated equipment employed for fine imaging of processed film surfaces. In this study, a prediction model of scanning electron microscopy was constructed by using a generalized regression neural network ... Keywords: generalized regression neural network, genetic algorithm, model, scanning electron microscope, statistical experiment

Sanghee Kwon; Donghwan Kim; Byungwhan Kim

2008-07-01T23:59:59.000Z

78

Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research  

E-Print Network (OSTI)

G. R. et al. Scanning transmission X-ray microscopy: A newwith the scanning transmission X-ray microscope at BESSY II.T. et al. Scanning transmission X-ray microscopy imaging of

Moffet, Ryan C.

2011-01-01T23:59:59.000Z

79

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

80

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

82

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...

83

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...

84

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 ...

85

Investigating physical and chemical changes in high-k gate stacks using nanoanalytical electron microscopy  

Science Conference Proceedings (OSTI)

The thermal budget involved in processing high-k gate stacks can cause undesirable physical and chemical changes which limit device performance. The transmission electron microscope and associated analytical techniques provide a way of investigating ... Keywords: Electron energy loss near edge structure, Electron energy loss spectroscopy, High-k dielectrics, Nanoanalytical electron microscopy

A. J. Craven; M. MacKenzie; D. W. McComb; F. T. Docherty

2005-06-01T23:59:59.000Z

86

Phase contrast in high resolution electron microscopy  

DOE Patents (OSTI)

This patent relates to a device for developing a phase contrast signal for a scanning transmission electron microscope. The lens system of the microscope is operated in a condition of defocus so that predictable alternate concentric regions of high and low electron density exist in the cone of illumination. Two phase detectors are placed beneath the object inside the cone of illumination, with the first detector having the form of a zone plate, each of its rings covering alternate regions of either higher or lower electron density. The second detector is so configured that it covers the regions of electron density not covered by the first detector. Each detector measures the number of electrons incident thereon and the signal developed by the first detector is subtracted from the signal developed by the record detector to provide a phase contrast signal. (auth)

Rose, H.H.

1975-09-23T23:59:59.000Z

87

Electron Microscopy Study of Tin Whisker Growth  

Science Conference Proceedings (OSTI)

The growth of tin whiskers formed on sputtered tin layers deposited on brass was studied using electron microscopy. The occurrence of whiskers appeared to be largely independent of the macroscopic stress state in the film; rather it was microscopic compressive stresses arising from the formation of an intermetallic phase that appeared to be the necessary precursor. Whisker morphology was a result of whether nucleation had occurred on single grains or on multiple grains. In the latter case, the whiskers had a fluted or striated surface. The formation of whiskers on electron transparent samples was demonstrated. These samples showed the whiskers were monocrystalline and defect free, and that the growth direction could be determined.

Norton, Murray G. (Washington State University); Lebret, Joel (8392)

2003-03-30T23:59:59.000Z

88

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

89

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

90

Electron and X-Ray Microscopy: Structural Characterization of ...  

Science Conference Proceedings (OSTI)

Oct 28, 2009 ... Recent Advances in Structural Characterization of Materials: Electron and X-Ray Microscopy: Structural Characterization of Nanoscale...

91

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

92

NCEM National Center for Electron Microscopy: Staff  

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

Staff Staff Scientific Technical / Admin. Postdoctoral and Visitors Uli Dahmen, Head Jane Cavlina / Administrator Abhay Gautam Christian Kisielowski John Turner Helmut Poppa Andrew Minor ChengYu Song Frances Allen Andreas Schmid Marissa Libbee Tamara Radetic Peter Ercius Karen Bustillo Haimei Zheng Jim Ciston Alpha N'Diaye Colin Ophus Gong Chen Burak Ozdol Velimir Radmilovic Sara Kiani Hua Guo Christian Liebscher Josh Kacher Chris Nelson Xiuguang Jin Qian Yu Mary Scott Search the LBNL directory services page for other LBNL staff. Scientific Staff Uli Dahmen udahmen@lbl.gov (510) 486-4627 Ulrich Dahmen is Director of the National Center for Electron Microscopy. His current research interests include embedded nanostructures and interfaces in materials. Embedded nanostructures. Size- and shape-dependence of structural phase

93

Refractive Optics for Hard X-ray Transmission Microscopy  

Science Conference Proceedings (OSTI)

For hard x-ray transmission microscopy at photon energies higher than 15 keV we design refractive condenser and imaging elements to be used with synchrotron light sources as well as with x-ray tube sources. The condenser lenses are optimized for low x-ray attenuation--resulting in apertures greater than 1 mm--and homogeneous intensity distribution on the detector plane, whereas the imaging enables high-resolution (condenser and imaging lenses are being developed. The imaging lenses (compound refractive lenses, CRLs) are made of SU-8 negative resist by deep x-ray lithography. SU-8 shows high radiation stability. The fabrication technique enables high-quality lens structures regarding surface roughness and arrangement precision with arbitrary 2D geometry. To provide point foci, crossed pairs of lenses are used. Condenser lenses have been made utilizing deep x-ray lithographic patterning of thick SU-8 layers, too, whereas in this case, the aperture is limited due to process restrictions. Thus, in terms of large apertures, condenser lenses made of structured and rolled polyimide film are more attractive. Both condenser types, x-ray mosaic lenses and rolled x-ray prism lenses (RXPLs), are considered to be implemented into a microscope setup. The x-ray optical elements mentioned above are characterized with synchrotron radiation and x-ray laboratory sources, respectively.

Simon, M.; Last, A.; Mohr, J.; Nazmov, V.; Reznikova, E. [Institute for Microstructure Technology, Karlsruhe Institute of Technology Kaiserstrasse 12, 76131 Karlsruhe (Germany); Ahrens, G.; Voigt, A. [Microresist Technology, Koepenikerstrasse 325, 12555 Berlin (Germany)

2011-09-09T23:59:59.000Z

94

Analytical Electron Microscopy examination of uranium contamination at the DOE Fernald operation site  

SciTech Connect

Analytical Electron Microscopy (AEM) has been used to identify uranium-bearing phases present in contaminated soils from the DOE Fernald operation site. A combination of optical microscopy, scanning electron microscopy with backscattered electron detection (SEM/BSE), and AEM was used in isolating and characterizing uranium-rich regions of the contaminated soils. Soil samples were prepared for transmission electron microscopy (TEM) by ultramicrotomy using an embedding resin previously employed for aquatic colloids and biological samples. This preparation method allowed direct comparison between SEM and TEM images. At the macroscopic level much of the uranium appears to be associated with clays in the soils; however, electron beam analysis revealed that the uranium is present as discrete phases, including iron oxides, silicates (soddyite), phosphates (autunites), and fluorite. Only low levels of uranium were actually within the clay minerals. The distribution of uranium phases was inhomogeneous at the submicron level.

Buck, E.C.; Dietz, N.L.; Bates, J.K.; Cunnane, J.C.

1993-02-01T23:59:59.000Z

95

TITLE: Environmental Electron Microscopy Study of the Nucleation and Growth of Si and Ge AUTHORS: Stephan Hofmann  

E-Print Network (OSTI)

transmission electron microscopy study of Si nanowire nucleation from Pd [1] and Ni under disilane exposure advances by lateral propagation of ledges, driven by catalytic dissociation of disilane and coupled Pd

Dunin-Borkowski, Rafal E.

96

A flow cell for electron microscopy imaging of specimen in ...  

A flow cell for electron microscopy imaging of specimen in liquid or gas. Note: The technology described above is an early stage opportunity. ...

97

NCEM National Center for Electron Microscopy: NCEM Fellowship  

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

Visiting Scientist Program Visiting Scientist Program The National Center for Electron Microscopy (NCEM) offers a program that gives participants the opportunity to conduct...

98

NCEM National Center for Electron Microscopy: Workshops and Seminars  

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

Upcoming Seminars Thursday, October 3, 2013 at 11am Matthew Mecklenburg Center for Electron Microscopy and MicroAnalysis, University of Southern California 2D crystals are...

99

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

100

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...

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Molecular image resolution in electron microscopy  

Science Conference Proceedings (OSTI)

In order to determine the ultimate molecular resolution attainable with a conventional electron microscope

Natsu Uyeda; Takashi Kobayashi; Eiji Suito; Yoshiyasu Harada

1972-01-01T23:59:59.000Z

102

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

103

NCEM National Center for Electron Microscopy: SPLEEM  

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

SPLEEM The Spin-Polarized Low-Energy Electron Microscope is a unique low-voltage electron microscope for the study of surfaces and interfaces. The instrument is very sensitive to...

104

In Situ Analytical Electron Microscopy for Probing Nanoscale Electrochemistry  

Science Conference Proceedings (OSTI)

Oxides and their tailored structures are at the heart of electrochemical energy storage technologies and advances in understanding and controlling the dynamic behaviors in the complex oxides, particularly at the interfaces, during electrochemical processes will catalyze creative design concepts for new materials with enhanced and better-understood properties. Such knowledge is not accessible without new analytical tools. New innovative experimental techniques are needed for understanding the chemistry and structure of the bulk and interfaces, more importantly how they change with electrochemical processes in situ. Analytical Transmission Electron Microscopy (TEM) is used extensively to study electrode materials ex situ and is one of the most powerful tools to obtain structural, morphological, and compositional information at nanometer scale by combining imaging, diffraction and spectroscopy, e.g., EDS (energy dispersive X-ray spectrometry) and Electron Energy Loss Spectrometry (EELS). Determining the composition/structure evolution upon electrochemical cycling at the bulk and interfaces can be addressed by new electron microscopy technique with which one can observe, at the nanometer scale and in situ, the dynamic phenomena in the electrode materials. In electrochemical systems, for instance in a lithium ion battery (LIB), materials operate under conditions that are far from equilibrium, so that the materials studied ex situ may not capture the processes that occur in situ in a working battery. In situ electrochemical operation in the ultra-high vacuum column of a TEM has been pursued by two major strategies. In one strategy, a 'nano-battery' can be fabricated from an all-solid-state thin film battery using a focused ion beam (FIB). The electrolyte is either polymer based or ceramic based without any liquid component. As shown in Fig. 1a, the interfaces between the active electrode material/electrolyte can be clearly observed with TEM imaging, in contrast to the composite electrodes/electrolyte interfaces in conventional lithium ion batteries, depicted in Fig.1b, where quantitative interface characterization is extremely difficult if not impossible. A second strategy involves organic electrolyte, though this approach more closely resembles the actual operation conditions of a LIB, the extreme volatility In Situ Analytical Electron Microscopy for Probing Nanoscale Electrochemistry by Ying Shirley Meng, Thomas McGilvray, Ming-Che Yang, Danijel Gostovic, Feng Wang, Dongli Zeng, Yimei Zhu, and Jason Graetz of the organic electrolytes present significant challenges for designing an in situ cell that is suitable for the vacuum environment of the TEM. Significant progress has been made in the past few years on the development of in situ electron microscopy for probing nanoscale electrochemistry. In 2008, Brazier et al. reported the first cross-section observation of an all solid-state lithium ion nano-battery by TEM. In this study the FIB was used to make a 'nano-battery,' from an all solid-state battery prepared by pulsed laser deposition (PLD). In situ TEM observations were not possible at that time due to several key challenges such as the lack of a suitable biasing sample holder and vacuum transfer of sample. In 2010, Yamamoto et al. successfully observed changes of electric potential in an all-solid-state lithium ion battery in situ with electron holography (EH). The 2D potential distribution resulting from movement of lithium ions near the positive-electrode/electrolyte interface was quantified. More recently Huang et al. and Wang et al. reported the in situ observations of the electrochemical lithiation of a single SnO{sub 2} nanowire electrode in two different in situ setups. In their approach, a vacuum compatible ionic liquid is used as the electrolyte, eliminating the need for complicated membrane sealing to prevent the evaporation of carbonate based organic electrolyte into the TEM column. One main limitation of this approach is that EELS spectral imaging is not possible due to the high plasmon signal of the ionic li

Graetz J.; Meng, Y.S.; McGilvray, T.; Yang, M.-C.; Gostovic, D.; Wang, F.; Zeng, D.; Zhu, Y.

2011-10-31T23:59:59.000Z

105

Ion-induced electron emission microscopy  

DOE Patents (OSTI)

An ion beam analysis system that creates multidimensional maps of the effects of high energy ions from an unfocussed source upon a sample by correlating the exact entry point of an ion into a sample by projection imaging of the secondary electrons emitted at that point with a signal from a detector that measures the interaction of that ion within the sample. The emitted secondary electrons are collected in a strong electric field perpendicular to the sample surface and (optionally) projected and refocused by the electron lenses found in a photon emission electron microscope, amplified by microchannel plates and then their exact position is sensed by a very sensitive X Y position detector. Position signals from this secondary electron detector are then correlated in time with nuclear, atomic or electrical effects, including the malfunction of digital circuits, detected within the sample that were caused by the individual ion that created these secondary electrons in the fit place.

Doyle, Barney L. (Albuquerque, NM); Vizkelethy, Gyorgy (Albuquerque, NM); Weller, Robert A. (Brentwood, TN)

2001-01-01T23:59:59.000Z

106

NCEM National Center for Electron Microscopy: Contact NCEM  

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

General Contact Jane Cavlina National Center for Electron Microscopy, MS 72-150 Lawrence Berkeley National Laboratory Berkeley, CA 94720 Tel.: (510) 486-6036 Fax: (510) 486-5888...

107

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

108

Full-field Transmission X-ray Microscopy | Stanford Synchrotron Radiation  

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

BL6-2c / Transmission X-ray Microscopy BL6-2c / Transmission X-ray Microscopy Home Researchers Publications Science Highlights Department of Energy Office of Science Search form Search Search TXM Search Full-field Transmission X-ray Microscopy Capabilities Full-field TXM is an excellent method to examine nanoscale heterogeneties in many materials, including complex hierarchical systems such as catalysts, fuel cells and battery electrodes, and biological and environmental samples, at 30 nm resolution.The transmission X-ray microscope (TXM) on beam line 6-2c at SSRL is capable of 2D imaging and tomography, as well as spectroscopic imaging for 2D and 3D elemental mapping and chemical mapping over tens of microns (up to mm in 2D). The field of view (FOV) is 30 microns, but mosaic images can be collected to

109

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

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

OM The One-Angstrom Microscope (OM) is a mid-voltage transmission electron microscope (TEM) capable of producing images with sub-angstrom resolution. The basic instrument is a...

110

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

111

Los Alamos: MST-MTM: EML: Electron Microscopy Laboratory  

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

3000F High Resolution Transmission Electron Microscope 3000F High Resolution Transmission Electron Microscope JEOL 3000F High Resolution Transmission Electron Microscope This is a high-resolution TEM equipped with an electron energy-loss spectrometer and a CCD camera for digital image acquisition. This microscope is used primarily for imaging the atomic structure of defects and interfaces in materials. Field emission electron source. Coherent source with an energy spread of 0.8 eV. Operation at accelerating voltages of up to 300 kV. +/- 10° of eucentric specimen tilt. Point to point resolution of 0.17 nm; 0.10 nm resolution can be extracted by computer processing. Gatan Multiscan CCD Camera for digital image acquisition. Automated microscope alignment: defocus calibration/adjustment, astigmatism correction and beam-tilt correction (automatic coma-free alignment).

112

Microscopy  

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

Microscopy Home Staff Only Microscopy Group Staff InstrumentationCapabilities The Advanced Microscopy Laboratory (AML) Microscopy User Centers: MAUC SHaRE Research Highlights...

113

NCEM National Center for Electron Microscopy: About NCEM  

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

NCEM NCEM The National Center for Electron Microscopy (NCEM) is one of the world's foremost centers for electron microscopy and microcharacterization. It is an Office of Science User Facility operated for the U.S. Department of Energy by Lawrence Berkeley National Laboratory. Located adjacent to the University of California, Berkeley, NCEM was established in 1983 to maintain a forefront research center for electron-optical characterization of materials with state-of-the-art instrumentation and expertise. As a national user facility, NCEM is open to scientists from universities, government and industrial laboratories. The center provides cutting-edge instrumentation, techniques and expertise for advanced electron beam microcharacterization of materials at high spatial

114

A facile electron microscopy method for measuring precipitate volume fractions in AlCuMg alloys  

SciTech Connect

Precipitate volume fraction is an important parameter to estimate the strength of precipitation-hardened metals. In this study, a facile method was applied to measure the precipitate volume fractions in an age-hardened AlCuMg alloy. In this method, the precipitate volume fraction values can be obtained by multiplying the volume precipitate number densities with the averaged precipitate volumes, which can be easily measured in scanning electron microscopy and transmission electron microscopy, respectively. Compared with the conventional method, in which the specimen thickness has to be measured in transmission electron microscopy, the method proposed in this study is more facile to perform. - Highlights: Black-Right-Pointing-Pointer We have proposed a facile method to measure precipitate volume fractions for precipitation-hardened metals. Black-Right-Pointing-Pointer This technique works well for the square-shaped {theta} Prime -phase nano-precipitates in 2xxx aluminum alloys. Black-Right-Pointing-Pointer Interesting is that the proposed method is easy for materials scientists and engineers to perform.

Zhao, X.Q.; Shi, M.J.; Chen, J.H., E-mail: jhchen123@hnu.edu.cn; Wang, S.B.; Liu, C.H.; Wu, C.L.

2012-07-15T23:59:59.000Z

115

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

116

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

117

Automatic Classification of Biological Particles fromElectron-microscopy Images Using Conventional and Genetic-algorithm Optimized Learning Vector Quantization  

Science Conference Proceedings (OSTI)

Automatic classification of transmission electron-microscopy images is an important step in the complex task of determining the structure of biologial macromolecules. The process of 3D reconstruction from a set of such images implies their previous ... Keywords: genetic algorithms, image classification, image reconstruction, neural network optimization, neural networks

J. J. Merelo; A. Prieto; F. Morn; R. Marabini; J. M. Carazo

1998-08-01T23:59:59.000Z

118

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)...

119

CFN Operations and Safety Awareness (COSA) Checklist Electron Microscopy Facility  

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

Electron Microscopy Facility Electron Microscopy Facility Building 735 This COSA form must be completed for all experimenters working in the CFN and must be submitted to the CFN User Office for badge access. CFN Safety Awareness Policy: Each user must be instructed in the safe procedures in CFN related activities. CFN Facility Laboratory personnel shall keep readily available all relevant instructions and safety literature. Employee/Guest Name Life/Guest Number Department/Division ES&H Coordinator/Ext. Facility Manager COSA Trainer Guest User Staff USER ADMINISTRATION Checked in at User Administration and has valid BNL ID badge Safety Approval Form (SAF) approved. Training requirements completed (Indicate additional training specified in SAF or ESR in lines provided below):

120

Scanning transmission x-ray microscopy: A new ``looking glass`` into coal chemical structure  

SciTech Connect

This paper reports the use of scanning transmission x-ray microscopy to spatially map the chemistry of aromatic and aliphatic carbon functionalities in coal to a resolution of less than 0.1 {mu}m. Localized x-ray absorption spectroscopy recorded at the carbon K absorption edge was also used to facilitate analysis of variations in fundamental chemistry at maceral interfaces and within maceral boundaries.

Botto, R.E.; Cody, G.D.

1994-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "transmission electron microscopy" 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

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

CM 200 FEG CM 200 FEG AEME The Philips CM200/FEG is a versatile instrument that is designed for analysis of the physical, chemical and magnetic microstructure at high spatial resolution. In addition to high resolution imaging capability, the machine is optimized for analytical electron microscopy and Lorentz imaging, under normal as well as dynamic conditions of variable temperature (77K - 1250K) and applied magnetic fields. Spatially resolved compositional analysis by X-ray emission spectroscopy (Z > 5), local electronic structure measurements by electron energy-loss spectroscopy (Z > 2), convergent beam electron diffraction for three-dimensional structure information, and energy-filtered imaging at the nanometer scale are some of the techniques available on this instrument. In addition, a TEM differential phase

122

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

123

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.

124

Analytical Microscopy  

DOE Green Energy (OSTI)

In the Analytical Microscopy group, within the National Center for Photovoltaic's Measurements and Characterization Division, we combine two complementary areas of analytical microscopy--electron microscopy and proximal-probe techniques--and use a variety of state-of-the-art imaging and analytical tools. We also design and build custom instrumentation and develop novel techniques that provide unique capabilities for studying materials and devices. In our work, we collaborate with you to solve materials- and device-related R&D problems. This sheet summarizes the uses and features of four major tools: transmission electron microscopy, scanning electron microscopy, the dual-beam focused-ion-beam workstation, and scanning probe microscopy.

Not Available

2006-06-01T23:59:59.000Z

125

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

126

Electron Microscopy Study of the LiFEPO4 to FePo4 Phase Transition  

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

Electron Microscopy Study of the LiFEPO4 to FePo4 Phase Transition Title Electron Microscopy Study of the LiFEPO4 to FePo4 Phase Transition Publication Type Journal Article Year of...

127

Aberration-Coreected Electron Microscopy at Brookhaven National Laboratory  

Science Conference Proceedings (OSTI)

The last decade witnessed the rapid development and implementation of aberration correction in electron optics, realizing a more-than-70-year-old dream of aberration-free electron microscopy with a spatial resolution below one angstrom [1-9]. With sophisticated aberration correctors, modern electron microscopes now can reveal local structural information unavailable with neutrons and x-rays, such as the local arrangement of atoms, order/disorder, electronic inhomogeneity, bonding states, spin configuration, quantum confinement, and symmetry breaking [10-17]. Aberration correction through multipole-based correctors, as well as the associated improved stability in accelerating voltage, lens supplies, and goniometers in electron microscopes now enables medium-voltage (200-300kV) microscopes to achieve image resolution at or below 0.1nm. Aberration correction not only improves the instrument's spatial resolution but, equally importantly, allows larger objective lens pole-piece gaps to be employed thus realizing the potential of the instrument as a nanoscale property-measurement tool. That is, while retaining high spatial resolution, we can use various sample stages to observe the materials response under various temperature, electric- and magnetic- fields, and atmospheric environments. Such capabilities afford tremendous opportunities to tackle challenging science and technology issues in physics, chemistry, materials science, and biology. The research goal of the electron microscopy group at the Dept. of Condensed Matter Physics and Materials Science and the Center for Functional Nanomaterials, as well as the Institute for Advanced Electron Microscopy, Brookhaven National Laboratory (BNL), is to elucidate the microscopic origin of the physical- and chemical-behavior of materials, and the role of individual, or groups of atoms, especially in their native functional environments. We plan to accomplish this by developing and implementing various quantitative electron microscopy techniques in strongly correlated electron systems and nanostructured materials. As a first step, with the support of Materials Science Division, Office of Basic Energy Science, US Department of Energy, and the New York State Office of Science, Technology, and Academic Research, recently we acquired three aberration-corrected electron microscopes from the three major microscope manufacturers, i.e., JEOL, Hitachi, and FEI. The Hitachi HD2700C is equipped with a probe corrector, the FEI Titan 80-300 has an imaging corrector, while the JEOL2200MCO has both. All the correctors are of the dual-hexapole type, designed and manufactured by CEOS GmbH based on the design due to Rose and Haider [3, 18]. All these three are one-of-a-kind in the US, designed for specialized capabilities in characterizing nanoscale structure. In this chapter, we review the performance of these state-of-the art instruments and the new challenges associated with the improved spatial resolution, including the environment requirements of the laboratory that hosts these instruments. Although each instrument we describe here has its own strengths and drawbacks, it is not our intention to rank them in terms of their performance, especially their spatial resolution in imaging.

Zhu,Y.; Wall, J.

2008-04-01T23:59:59.000Z

128

Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research  

Science Conference Proceedings (OSTI)

Scanning transmission x-ray microscopy (STXM) combines x-ray microscopy and near edge x-ray absorption fine structure spectroscopy (NEXAFS). This combination provides spatially resolved bonding and oxidation state information. While there are reviews relevant to STXM/NEXAFS applications in other environmental fields (and magnetic materials) this chapter focuses on atmospheric aerosols. It provides an introduction to this technique in a manner approachable to non-experts. It begins with relevant background information on synchrotron radiation sources and a description of NEXAFS spectroscopy. The bulk of the chapter provides a survey of STXM/NEXAFS aerosol studies and is organized according to the type of aerosol investigated. The purpose is to illustrate the current range and recent growth of scientific investigations employing STXM-NEXAFS to probe atmospheric aerosol morphology, surface coatings, mixing states, and atmospheric processing.

Moffet, Ryan C.; Tivanski, Alexei V.; Gilles, Mary K.

2011-01-20T23:59:59.000Z

129

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

0.5 0.5 The TEAM 0.5 microscope is a double-aberration-corrected (scanning) transmission electron microscope (STEM/TEM) capable of producing images with 50 pm resolution. The basic instrument is a modified FEI Titan 80-300 microscope equipped with a special high-brightness Schottky-field emission electron source, a gun monochromator, a high-resolution GIF Tridiem energy-filter, and two CEOS hexapole-type spherical aberration correctors. The illumination aberration corrector corrects coherent axial aberrations up to 4th order, as well as 5th order spherical aberration and six-fold astigmatism. The imaging aberration corrector fully corrects for coherent axial aberrations up to 3rd order and partially compensates for 4th and 5th order aberrations. The microscope has two 2048x2048 slow-scan CCD

130

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

131

Electron Microscopy Studies of GaP(N,As) Grown on Si  

DOE Green Energy (OSTI)

The objective of this work is to perform transmission electron microscopy (TEM) studies of GaP(N,As) alloys grown by metal-organic chemical vapor deposition (MOCVD) on Si substrates. These alloys are of interest for the fabrication of high-efficiency tandem solar cells based on Si. The results indicated that the nucleation and growth conditions used are critical for obtaining planar epitaxial layers with a low defect density. In particular, antiphase domains are eliminated using a low growth temperature. TEM studies of these alloy layers, which contain only a few percent N, revealed no phase separation. However, electron diffraction studies revealed the first evidence of CuPt-type atomic ordering in these P-rich, dilute nitride alloy layers.

Norman, A. G.; Geisz, J. F.; Olson, J. M.; Jones, K. M.; Al-Jassim, M. M.

2005-01-01T23:59:59.000Z

132

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

SPLEEM SPLEEM Publications Imaging Spin Reorientation Transitions in Consecutive Atomic Co layers, Farid El Gabaly, Silvia Gallego, M. Carmen Munoz, Laszlo Szunyogh, Peter Weinberger, Kevin F. McCarty, Christof Klein, Andreas K. Schmid, Juan de la Figuera, submitted Direct imaging of spin-reorientation transitions in ultra-thin Ni films by spin-polarized low-energy electron microscopy, C. Klein, A. K. Schmid, R. Ramchal, and M. Farle, submitted Controlling the kinetic order of spin-reorientation transitions in Ni/Cu(100) films by tuning the substrate step-structure, C. Klein, R. Ramchal, A.K. Schmid, M. Farle, submitted Self-organization and magnetic domain microstructure of Fe nanowire arrays, N. Rougemaille and A.K. Schmid, submitted Self-Assembled Nanofold Network Formation on Layered Crystal Surfaces

133

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

Specimen Preparation Specimen Preparation Preparation of samples with large transparent areas and flat surfaces is a key element of electron microscopy. In particular, the interpretation of lattice or holographic images is often limited by the sample's geometry and surface roughness. These parameters are largely determined by a particular sample preparation procedure. The increasing demand for microscopes with a spatial resolution of better than 1Å increases the need for improved sample preparation techniques. A substantial effort at NCEM is devoted to the development of reliable and specialized thinning techniques. Current programs explore the application of chemicals to shape the surfaces of thin films, the use of nanospheres for observation of small particles, and the

134

Summary of Analytical Electron Microscopy Observation of Intergranular Attack and Stress Corrosion Cracks in Alloy 600 Steam Generator Tubing  

Science Conference Proceedings (OSTI)

High-resolution analytical transmission electron microscopy (ATEM) can identify structures and compositions of corrosion products in attacked boundaries, cracks, and crack tips to help assess impurities that promote intergranular degradation. ATEM analyses has recently been performed on samples from Watts Bar 1 and Diablo Canyon 2 steam generator (SG) tubing and has revealed that lead (Pb) was involved in intergranular stress corrosion cracking (IGSCC). These new results in combination with previous resu...

2005-04-29T23:59:59.000Z

135

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 controllerswith 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

136

Electron and Scanning Probe Microscopies | U.S. DOE Office of Science (SC)  

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

Electron and Scanning Probe Microscopies Electron and Scanning Probe Microscopies Materials Sciences and Engineering (MSE) Division MSE Home About Research Areas Energy Frontier Research Centers (EFRCs) DOE Energy Innovation Hubs BES Funding Opportunities The Computational Materials and Chemical Sciences Network (CMCSN) Theoretical Condensed Matter Physics Scientific Highlights Reports and Activities Principal Investigators' Meetings BES Home Research Areas Electron and Scanning Probe Microscopies Print Text Size: A A A RSS Feeds FeedbackShare Page This research area supports basic research in condensed matter physics and materials physics using electron scattering and microscopy and scanning probe techniques. The research includes experiments and theory to understand the atomic, electronic, and magnetic structures of materials.

137

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

138

Imaging doped silicon test structures using low energy electron microscopy.  

SciTech Connect

This document is the final SAND Report for the LDRD Project 105877 - 'Novel Diagnostic for Advanced Measurements of Semiconductor Devices Exposed to Adverse Environments' - funded through the Nanoscience to Microsystems investment area. Along with the continuous decrease in the feature size of semiconductor device structures comes a growing need for inspection tools with high spatial resolution and high sample throughput. Ideally, such tools should be able to characterize both the surface morphology and local conductivity associated with the structures. The imaging capabilities and wide availability of scanning electron microscopes (SEMs) make them an obvious choice for imaging device structures. Dopant contrast from pn junctions using secondary electrons in the SEM was first reported in 1967 and more recently starting in the mid-1990s. However, the serial acquisition process associated with scanning techniques places limits on the sample throughput. Significantly improved throughput is possible with the use of a parallel imaging scheme such as that found in photoelectron emission microscopy (PEEM) and low energy electron microscopy (LEEM). The application of PEEM and LEEM to device structures relies on contrast mechanisms that distinguish differences in dopant type and concentration. Interestingly, one of the first applications of PEEM was a study of the doping of semiconductors, which showed that the PEEM contrast was very sensitive to the doping level and that dopant concentrations as low as 10{sup 16} cm{sup -3} could be detected. More recent PEEM investigations of Schottky contacts were reported in the late 1990s by Giesen et al., followed by a series of papers in the early 2000s addressing doping contrast in PEEM by Ballarotto and co-workers and Frank and co-workers. In contrast to PEEM, comparatively little has been done to identify contrast mechanisms and assess the capabilities of LEEM for imaging semiconductor device strictures. The one exception is the work of Mankos et al., who evaluated the impact of high-throughput requirements on the LEEM designs and demonstrated new applications of imaging modes with a tilted electron beam. To assess its potential as a semiconductor device imaging tool and to identify contrast mechanisms, we used LEEM to investigate doped Si test structures. In section 2, Imaging Oxide-Covered Doped Si Structures Using LEEM, we show that the LEEM technique is able to provide reasonably high contrast images across lateral pn junctions. The observed contrast is attributed to a work function difference ({Delta}{phi}) between the p- and n-type regions. However, because the doped regions were buried under a thermal oxide ({approx}3.5 nm thick), e-beam charging during imaging prevented quantitative measurements of {Delta}{phi}. As part of this project, we also investigated a series of similar test structures in which the thermal oxide was removed by a chemical etch. With the oxide removed, we obtained intensity-versus-voltage (I-V) curves through the transition from mirror to LEEM mode and determined the relative positions of the vacuum cutoffs for the differently doped regions. Although the details are not discussed in this report, the relative position in voltage of the vacuum cutoffs are a direct measure of the work function difference ({Delta}{phi}) between the p- and n-doped regions.

Nakakura, Craig Yoshimi; Anderson, Meredith Lynn; Kellogg, Gary Lee

2010-01-01T23:59:59.000Z

139

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

140

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

A stochastic kinematic model of class averaging in single-particle electron microscopy  

Science Conference Proceedings (OSTI)

Single-particle electron microscopy is an experimental technique that is used to determine the three-dimensional (3D) structure of biological macromolecules and the complexes that they form. In general, image processing techniques and reconstruction ... Keywords: Class average, convolution, image alignment, single-particle electron microscopy

Wooram Park; Charles R Midgett; Dean R Madden; Gregory S Chirikjian

2011-05-01T23:59:59.000Z

142

Recent Advances in Electron Microscopy, Spectral Imaging, and ...  

Science Conference Proceedings (OSTI)

... such as adhesion performance, corrosion resistance, electrical and magnetic ... and surface analysis techniques for probing the composition and structure of ... microscopy and energy dispersive X-ray spectroscopy (FESEM/STEM/EDS);...

143

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

144

A Comparison of Image Quality Evaluation Techniques for Transmission X-Ray Microscopy  

SciTech Connect

Beamline 6-2c at Stanford Synchrotron Radiation Lightsource (SSRL) is capable of Transmission X-ray Microscopy (TXM) at 30 nm resolution. Raw images from the microscope must undergo extensive image processing before publication. Since typical data sets normally contain thousands of images, it is necessary to automate the image processing workflow as much as possible, particularly for the aligning and averaging of similar images. Currently we align images using the 'phase correlation' algorithm, which calculates the relative offset of two images by multiplying them in the frequency domain. For images containing high frequency noise, this algorithm will align noise with noise, resulting in a blurry average. To remedy this we multiply the images by a Gaussian function in the frequency domain, so that the algorithm ignores the high frequency noise while properly aligning the features of interest (FOI). The shape of the Gaussian is manually tuned by the user until the resulting average image is sharpest. To automatically optimize this process, it is necessary for the computer to evaluate the quality of the average image by quantifying its sharpness. In our research we explored two image sharpness metrics, the variance method and the frequency threshold method. The variance method uses the variance of the image as an indicator of sharpness while the frequency threshold method sums up the power in a specific frequency band. These metrics were tested on a variety of test images, containing both real and artificial noise. To apply these sharpness metrics, we designed and built a MATLAB graphical user interface (GUI) called 'Blur Master.' We found that it is possible for blurry images to have a large variance if they contain high amounts of noise. On the other hand, we found the frequency method to be quite reliable, although it is necessary to manually choose suitable limits for the frequency band. Further research must be performed to design an algorithm which automatically selects these parameters.

Bolgert, Peter J; /Marquette U. /SLAC

2012-08-31T23:59:59.000Z

145

Strain mapping with nm-scale resolution for the silicon-on-insulator generation of semiconductor devices by advanced electron microscopy  

SciTech Connect

Strain engineering in the conduction channel is a cost effective method of boosting the performance in state-of-the-art semiconductor devices. However, given the small dimensions of these devices, it is difficult to quantitatively measure the strain with the required spatial resolution. Three different transmission electron microscopy techniques, high-angle annular dark field scanning transmission electron microscopy, dark field electron holography, and nanobeam electron diffraction have been applied to measure the strain in simple bulk and SOI calibration specimens. These techniques are then applied to different gate length SiGe SOI pFET devices in order to measure the strain in the conduction channel. For these devices, improved spatial resolution is required, and strain maps with spatial resolutions as good as 1 nm have been achieved. Finally, we discuss the relative advantages and disadvantages of using these three different techniques when used for strain measurement.

Cooper, David; Denneulin, Thibaud; Barnes, Jean-Paul; Hartmann, Jean-Michel; Hutin, Louis; Le Royer, Cyrille [CEA, LETI France MINATEC Campus, 17 rue des Martyrs, 38054 Grenoble Cedex 9 (France); Beche, Armand [CEA, LETI, and FEI France MINATEC Campus, 17 rue des Martyrs, 38054 Grenoble Cedex 9 (France); Rouviere, Jean-Luc [CEA, INAC, MINATEC Campus, 17 rue des Martyrs, 38054 Grenoble Cedex 9 (France)

2012-12-15T23:59:59.000Z

146

Los Alamos: MST: MST-6: EML: Electron Microscopy Laboratory  

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

Strata DB235 FIB/SEM (Focused Ion Beam/High Reolution Scanning Electron Microscope) Strata DB235 FIB/SEM (Focused Ion Beam/High Reolution Scanning Electron Microscope) FEI Strata DB235 FIB/SEM (Focused Ion Beam/High Reolution Scanning Electron Microscope) This is a versatile field emission scanning electron microscope integrated with a focused ion beam column that is used for sophisticated SEM and TEM sample preparation, micromachining, and ultrahigh resolution SEM imaging. The microscope is also equipped for x-ray microanalysis and crystallographic orientation imaging. Microscope consists of a Hexalens SFEG electron beam column, and a Magnum ion beam column with a gallium liquid metal ion source. Imaging with both secondary electrons and ions. Digital image acquisition. Small, stable, high brightness Schottky based field emission electron source provides 1.5 nm resolution at 30 kV. Three electron beam lens modes - normal imaging, high resolution imaging, and EDS imaging.

147

Analytical electron microscopy characterization of uranium-contaminated soils from the Fernald Site, FY1993 report  

SciTech Connect

A combination of optical microscopy, scanning electron microscopy with backscattered electron detection (SEM/BSE), and analytical electron microscopy (AEM) is being used to determine the nature of uranium in soils from the Fernald Environmental Management Project. The information gained from these studies is being used to develop and test remediation technologies. Investigations using SEM have shown that uranium is contained within particles that are typically 1 to 100 {mu}m in diameter. Further analysis with AEM has shown that these uranium-rich regions are made up of discrete uranium-bearing phases. The distribution of these uranium phases was found to be inhomogeneous at the microscopic level.

Buck, E.C.; Cunnane, J.C.; Brown, N.R.; Dietz, N.L.

1994-10-01T23:59:59.000Z

148

Compact, low power radio frequency cavity for femtosecond electron microscopy  

Science Conference Proceedings (OSTI)

Reported here is the design, construction, and characterization of a small, power efficient, tunable dielectric filled cavity for the creation of femtosecond electron bunches in an existing electron microscope without the mandatory use of femtosecond lasers. A 3 GHz pillbox cavity operating in the TM{sub 110} mode was specially designed for chopping the beam of a 30 keV scanning electron microscope. The dielectric material used is ZrTiO{sub 4}, chosen for the high relative permittivity ({epsilon}{sub r}= 37 at 10 GHz) and low loss tangent (tan {delta}= 2 x 10{sup -4}). This allows the cavity radius to be reduced by a factor of six, while the power consumption is reduced by an order of magnitude compared to a vacuum pillbox cavity. These features make this cavity ideal as a module for existing electron microscopes, and an alternative to femtosecond laser systems integrated with electron microscopes.

Lassise, A.; Mutsaers, P. H. A.; Luiten, O. J. [Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (Netherlands)

2012-04-15T23:59:59.000Z

149

Development of multiplexing strategies for electron and super-resolution optical microscopy/  

E-Print Network (OSTI)

The aim of this work is to increase the multiplexing capabilities of electron and super resolution optical microscopy. This will be done through the development of molecular-scale barcodes that can be resolved in one of ...

Tillberg, Paul W

2013-01-01T23:59:59.000Z

150

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.

151

Investigation of proximity effects in electron microscopy and lithography  

SciTech Connect

A fundamental challenge in lithographic and microscopic techniques employing focused electron beams are so-called proximity effects due to unintended electron emission and scattering in the sample. Herein, we apply a method that allows for visualizing electron induced surface modifications on a SiN substrate covered with a thin native oxide layer by means of iron deposits. Conventional wisdom holds that by using thin membranes proximity effects can be effectively reduced. We demonstrate that, contrary to the expectation, these can be indeed larger on a 200 nm SiN-membrane than on the respective bulk substrate due to charging effects.

Walz, M.-M.; Vollnhals, F.; Rietzler, F.; Schirmer, M.; Steinrueck, H.-P.; Marbach, H.

2012-01-30T23:59:59.000Z

152

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

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

TEM and STEM. In addition, the incorporation of a monochromator into the gun permits electron energy loss spectroscopy to be performed with an energy resolution of 0.15eV. This...

153

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

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

The system contains both a focused Ga+ ion beam and a field emission scanning electron column. The ion column can be used for selective removal of material by ion beam...

154

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

155

Detecting Cellulase Penetration Into Corn Stover Cell Walls by Immuno-Electron Microscopy  

Science Conference Proceedings (OSTI)

In general, pretreatments are designed to enhance the accessibility of cellulose to enzymes, allowing for more efficient conversion. In this study, we have detected the penetration of major cellulases present in a commercial enzyme preparation (Spezyme CP) into corn stem cell walls following mild-, moderate- and high-severity dilute sulfuric acid pretreatments. The Trichoderma reesei enzymes, Cel7A (CBH I) and Cel7B (EG I), as well as the cell wall matrix components xylan and lignin were visualized within digested corn stover cell walls by immuno transmission electron microscopy (TEM) using enzyme- and polymer-specific antibodies. Low severity dilute-acid pretreatment (20 min at 100 C) enabled <1% of the thickness of secondary cell walls to be penetrated by enzyme, moderate severity pretreatment at (20 min at 120 C) allowed the enzymes to penetrate {approx}20% of the cell wall, and the high severity (20 min pretreatment at 150 C) allowed 100% penetration of even the thickest cell walls. These data allow direct visualization of the dramatic effect dilute-acid pretreatment has on altering the condensed ultrastructure of biomass cell walls. Loosening of plant cell wall structure due to pretreatment and the subsequently improved access by cellulases has been hypothesized by the biomass conversion community for over two decades, and for the first time, this study provides direct visual evidence to verify this hypothesis. Further, the high-resolution enzyme penetration studies presented here provide insight into the mechanisms of cell wall deconstruction by cellulolytic enzymes.

Donohoe, B. S.; Selig, M. J.; Viamajala, S.; Vinzant, T. B.; Adney, W. S.; Himmel, M. E.

2009-06-15T23:59:59.000Z

156

The theory and practice of high resolution scanning electron microscopy  

Science Conference Proceedings (OSTI)

Recent advances in instrumentation have produced the first commercial examples of what can justifiably be called High Resolution Scanning Electron Microscopes. The key components of such instruments are a cold field emission gun, a small-gap immersion probe-forming lens, and a clean dry-pumped vacuum. The performance of these microscopes is characterized by several major features including a spatial resolution, in secondary electron mode on solid specimens, which can exceed 1nm on a routine basis; an incident probe current density of the order of 10{sup 6} amps/cm{sup 2}; and the ability to maintain these levels of performance over an accelerating voltage range of from 1 to 30keV. This combination of high resolution, high probe current, low contamination and flexible electron-optical conditions provides many new opportunitites for the application of the SEM to materials science, physics, and the life sciences. 27 refs., 14 figs.

Joy, D.C. (Tennessee Univ., Knoxville, TN (USA) Oak Ridge National Lab., TN (USA))

1990-01-01T23:59:59.000Z

157

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

AEM AEM AEME The Analytical Electron Microscope is optimized for elemental microanalysis. The basic instrument is a JEOL 200CX microscope with a side-entry double-tilt goniometer stage and an assortment of specimen holders. This machine can be operated at between 80 and 200 kV in the TEM or STEM mode. Electron energy loss and x-ray signals for elemental microanalysis or spectral imaging can be collected either separately or simultaneously using probe diameters from 6nm to 100nm. Diffraction modes include convergent beam diffraction for three-dimensional structure information and micro-diffraction with a minimum probe size of 20nm. For updates or details, contact Zonghoon Lee or Velimir Radmilovic. The instrument is equipped with two Kevex EDXS detectors and a Gatan PEELS

158

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

LIBRA LIBRA The 200kV Zeiss monochromated LIBRA 200MC is designed to produce high contrast imaging for TEM and STEM and either convergent beam or parallel beam diffraction using Koehler illumination.In addition, the incorporation of a monochromator into the field emission gun enables energy resolution of ~0.15eV for electron energy loss spectroscopy. The dedicated in-column Omega Filter implemented in this microscope also can be used for both spectroscopic analysis and energy-filtered imaging with a 2048x2048 CCD camera. The high tilt capability of the stage and pole piece accepts various types of analytical holders.This microscope is optimized for soft materials applications that require either the high contrast imaging performance or analytical methods such as EF-TEM and STEM.( Instrument

159

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.

160

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 ...

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Nano-mineralogy studies by advanced electron microscopy Chi Ma and George R. Rossman  

E-Print Network (OSTI)

Nano-mineralogy studies by advanced electron microscopy Chi Ma and George R. Rossman Division and planetary materials easier and faster down to nano-scales. Small but new minerals with important geological significance are being discovered. Nano-features are being discovered in many common minerals and gems, which

Ma, Chi

162

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

163

A new bend magnet beam line for scanning transmission x-ray microscopy at the Advanced Light Source  

Science Conference Proceedings (OSTI)

The high brightness of the bend magnets at the Advanced Light Source has been exploited to illuminate a Scanning Transmission X-ray Microscope (STXM). This is the first diffraction-limited scanning x-ray microscope to operate with useful count rate on a synchrotron bend magnet source. A simple, dedicated beam line has been built covering the range of photon energy from 250 eV to 600 eV. Ease of use and operational availability are radically improved compared to previous installations using undulator beams. This facility provides radiation for C 1s, N 1s and O 1s near edge x-ray absorption spectro-microscopy with a spectral resolution up to about 1:5000 and with STXM count rates in excess of 1 MHz.

Warwick, Tony; Ade, Harald; Kilcoyne, A.L. David; Kritscher, Michael; Tylisczcak, Tolek; Fakra, Sirine; Hitchcock, Adam P.; Hitchcock, Peter; Padmore, Howard A.

2001-12-12T23:59:59.000Z

164

Demonstration of Ballistic Electron Emission Microscopy / Spectroscopy on the Au/Si (001) system  

E-Print Network (OSTI)

The Ballistic Electron Emission Microscopy (BEEM) capabilities of a Scanning Tunneling Microscope (STM) have been verified. BEEM is used to analyze the characteristics of buried energy barriers and was developed as an extension of scanning tunneling microscopy; hence, the analytical capabilities of BEEM are on a manometer scale. To use BEEM, low-noise Au/Si (001) Schottky diodes have been fabricated. The diodes were macroscopically tested for their electrical properties using conventional current-voltage (I-V) techniques. The same diodes were then placed in an ultra-high vacuum STM system and analyzed with BEEM. The ballistic electron emission microscopy and scanning tunneling microscopy showed some correlation with the topography of the evaporated gold surface. The barrier heights of the diodes were extracted from the ballistic electron emission spectroscopy with the use of a simple one dimensional BEEM current model. Comparison between the barrier heights obtained with BEEM and conventional I-V techniques showed the localized barrier heights to be higher than the macroscopic barrier heights.

Drummond, Mary Alyssa

1997-01-01T23:59:59.000Z

165

Microscopy Methods  

Science Conference Proceedings (OSTI)

... NIST has worked extensively with microscope manufacturers such as FEI ... Electron microscopy methods have been used to characterize potential ...

2012-10-05T23:59:59.000Z

166

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

167

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).

168

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...

169

Analytical electron microscopy characterization of Fernald soils. Annual report, October 1993--September 1994  

SciTech Connect

A combination of backscattered electron imaging and analytical electron microscopy (AEM) with electron diffraction have been used to determine the physical and chemical properties of uranium contamination in soils from the Fernald Environmental Management Project in Ohio. The information gained from these studies has been used in the development and testing of remediation technologies. Most chemical washing techniques have been reasonably effective with uranyl [U(VI)] phases, but U(IV) phases have proven difficult to remove from the soils. Carbonate leaching in an oxygen environment (heap leaching) has removed some of the U(IV) phases, and it appears to be the most effective technique developed in the program. The uranium metaphosphate, which was found exclusively at an incinerator site, has not been removed by any of the chemical methods. We suggest that a physical extraction procedure (either a magnetic separation or aqueous biphasic process) be used to remove this phase. Analytical electron microscopy has also been used to determine the effect of the chemical agents on the uranium phases. It has also been used to examine soils from the Portsmouth site in Ohio. The contamination there took the form of uranium oxide and uranium calcium oxide phases. Technology transfer efforts over FY 1994 have led to industry-sponsored projects involving soil characterization.

Buck, E.C.; Brown, N.R.; Dietz, N.L.

1995-03-01T23:59:59.000Z

170

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

171

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

172

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

173

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

174

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

175

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

176

Plasmonic Field Enhancement of Individual Nanoparticles by Correlated Scanning and Photoemission Electron Microscopy  

SciTech Connect

We present results of a combined two-photon photoemission and scanning electron microscopy investigation to determine the electromagnetic enhancement factors of silver-coated spherical nanoparticles deposited on an atomically flat mica substrate. Femtosecond laser excitation, of the nanoparticles, produces intense photoemission, attributed to near-resonant excitation of localized surface plasmons. Enhancement factors are determined by comparing the respective two-photon photoemission yield measured for equal areas between single nanoparticles to that of the surrounding flat surface. For s-polarized, 400 nm (~ 3.1 eV) femtosecond radiation a distribution of enhancement factors are found with a large percentage (77%) of the nanoparticles falling within a median range. A correlated scanning electron microscopy analysis demonstrated that the nanoparticles typifying the median of the distribution were characterized by ideal spherical shapes and defect-free morphologies. The single largest enhancement factors were in contrast produced by a very small percentage (8%) of the total, for which evidence of silver defect anomalies were found that contributed to the overall structure of the nanoparticle. Comparisons are made between the experimentally measured enhancement factors and previously reported theoretical predictions of the localized surface plasmon near-field intensities for isolated nanometer-sized silver spheres.

Peppernick, Samuel J.; Joly, Alan G.; Beck, Kenneth M.; Hess, Wayne P.

2011-01-21T23:59:59.000Z

177

Materials Science and Engineering A314 (2001) 157161 In situ transmission electron microscopy observations of  

E-Print Network (OSTI)

the piezos increase as the walls become thinner, so depoling will then be- come the limiting factor. Typical PZT piezos have dc depoling fields of at least 200 V/mm, so allowable tube thicknesses may be 1.2 mm

Chen, Haydn H.

178

Transmission electron microscopy of oxide development on 9Cr ODS steel in supercritical water  

E-Print Network (OSTI)

. These axial segments were inserted and contained in a thin- walled, 3-mm diameter brass tube with the same

Motta, Arthur T.

179

Transmission electron microscopy examination of oxide layers formed on Zr alloys  

E-Print Network (OSTI)

which slid into a 3 mm round brass tube, as done previously [12]. The sample configurations were held

Motta, Arthur T.

180

Actuatable capacitive transducer for quantitative nanoindentation combined with transmission electron microscopy  

Science Conference Proceedings (OSTI)

An actuatable capacitive transducer including a transducer body, a first capacitor including a displaceable electrode and electrically configured as an electrostatic actuator, and a second capacitor including a displaceable electrode and electrically configured as a capacitive displacement sensor, wherein the second capacitor comprises a multi-plate capacitor. The actuatable capacitive transducer further includes a coupling shaft configured to mechanically couple the displaceable electrode of the first capacitor to the displaceable electrode of the second capacitor to form a displaceable electrode unit which is displaceable relative to the transducer body, and an electrically-conductive indenter mechanically coupled to the coupling shaft so as to be displaceable in unison with the displaceable electrode unit.

Warren, Oden L; Asif, Syed Amanula Syed; Cyrankowski, Edward; Kounev, Kalin

2013-06-04T23:59:59.000Z

Note: This page contains sample records for the topic "transmission electron microscopy" 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

High-Resolution Transmission Electron Microscopy Observation of Colloidal Nanocrystal Growth Mechanisms using Graphene Liquid Cells  

E-Print Network (OSTI)

Growth Mechanisms using Graphene Liquid Cells Jong Min Yuk,Legends Fig. S1. Preparation of a graphene liquid cell. (fabrication processes of the graphene liquid cell. (B) SEM

Yuk, Jong Min

2013-01-01T23:59:59.000Z

182

Direct Observation of Colloidal Nanocrystals by Using Liquid Cell Transmission Electron Microscopy  

E-Print Network (OSTI)

superlattices. Angewandte Chemie (International ed. incrystals. Angewandte Chemie (International ed. in English)nanocrystals. Angewandte Chemie (International ed. in

Park, Jungwon

2012-01-01T23:59:59.000Z

183

Hollow-cone Dark-field Transmission Electron Microscopy for Grain ...  

Science Conference Proceedings (OSTI)

Conventional bright-field and dark-field TEM images often cannot provide such ... Stages of Precipitation of Alpha Platelets in the Beta Matrix of Titanium Alloys.

184

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

185

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

186

Three-dimensional structure of human chromatin accessibility complex hCHRAC by electron microscopy  

SciTech Connect

ATP-dependent chromatin remodeling complexes modulate the dynamic assembly and remodeling of chromatin involved in DNA transcription, replication, and repair. There is little structural detail known about these important multiple-subunit enzymes that catalyze chromatin remodeling processes. Here we report a three-dimensional structure of the human chromatin accessibility complex, hCHRAC, using single particle reconstruction by negative stain electron microscopy. This structure shows an asymmetric 15 x 10 x 12 nm disk shape with several lobes protruding out of its surfaces. Based on the factors of larger contact area, smaller steric hindrance, and direct involvement of hCHRAC in interactions with the nucleosome, we propose that four lobes on one side form a multiple-site contact surface 10 nm in diameter for nucleosome binding. This work provides the first determination of the three-dimensional structure of the ISWI-family of chromatin remodeling complexes.

Hu, M.; Hainfeld, J.; Zhang, Y.-B.; Qian, L.; Brinas, R. P.; Kuznetsova, L.

2008-12-01T23:59:59.000Z

187

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

188

Sub-Angstrom electron microscopy for sub-Angstrom nano-metrology  

E-Print Network (OSTI)

Microscopy for Sub-ngstrom Nano-Metrology Michael A. OMicroscopy for Sub-ngstrom Nano-Metrology Michael A. Owhat we build. Because nano-devices operate on the level of

O'Keefe, Michael A.; Allard, Lawrence F.

2004-01-01T23:59:59.000Z

189

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

190

Observation of coupled vortex gyrations by 70-ps-time and 20-nm-space- resolved full-field magnetic transmission soft x-ray microscopy  

SciTech Connect

We employed time-and space-resolved full-field magnetic transmission soft x-ray microscopy to observe vortex-core gyrations in a pair of dipolar-coupled vortex-state Permalloy (Ni{sub 80}Fe{sub 20}) disks. The 70 ps temporal and 20 nm spatial resolution of the microscope enabled us to simultaneously measure vortex gyrations in both disks and to resolve the phases and amplitudes of both vortex-core positions. We observed their correlation for a specific vortex-state configuration. This work provides a robust and direct method of studying vortex gyrations in dipolar-coupled vortex oscillators.

Jung, Hyunsung; Yu, Young-Sang; Lee, Ki-Suk; Im, Mi-Young; Fischer, Peter; Bocklage, Lars; Vogel, Andreas; Bolte, Markus; Meier, Guido; Kim, Sang-Koog

2010-09-01T23:59:59.000Z

191

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

192

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

193

Book Review published by Analysis, 1997: Reflection Electron Microscopy and Spectroscopy for Surface Analysis, By Zhong Lin Wang  

E-Print Network (OSTI)

Book Review published by Analysis, 1997: Reflection Electron Microscopy and Spectroscopy for Surface Analysis, By Zhong Lin Wang Professor John F. Watts University of Surrey The book describes, but the author is considerate enough to define them all in the early pages of his book. The dust-cover notes

Wang, Zhong L.

194

Semi-Automated Neuron Boundary Detection and Nonbranching Process Segmentation in Electron Microscopy Images  

SciTech Connect

Neuroscientists are developing new imaging techniques and generating large volumes of data in an effort to understand the complex structure of the nervous system. The complexity and size of this data makes human interpretation a labor-intensive task. To aid in the analysis, new segmentation techniques for identifying neurons in these feature rich datasets are required. This paper presents a method for neuron boundary detection and nonbranching process segmentation in electron microscopy images and visualizing them in three dimensions. It combines both automated segmentation techniques with a graphical user interface for correction of mistakes in the automated process. The automated process first uses machine learning and image processing techniques to identify neuron membranes that deliniate the cells in each two-dimensional section. To segment nonbranching processes, the cell regions in each two-dimensional section are connected in 3D using correlation of regions between sections. The combination of this method with a graphical user interface specially designed for this purpose, enables users to quickly segment cellular processes in large volumes.

Jurrus, Elizabeth R.; Watanabe, Shigeki; Giuly, Richard J.; Paiva, Antonio R.; Ellisman, Mark H.; Jorgensen, Erik M.; Tasdizen, Tolga

2013-01-01T23:59:59.000Z

195

Characterization of plutonium-bearing wastes by chemical analysis and analytical electron microscopy  

Science Conference Proceedings (OSTI)

This report summarizes the results of characterization studies of plutonium-bearing wastes produced at the US Department of Energy weapons production facilities. Several different solid wastes were characterized, including incinerator ash and ash heels from Rocky Flats Plant and Los Alamos National Laboratory; sand, stag, and crucible waste from Hanford; and LECO crucibles from the Savannah River Site. These materials were characterized by chemical analysis and analytical electron microscopy. The results showed the presence of discrete PuO{sub 2}PuO{sub 2{minus}x}, and Pu{sub 4}O{sub 7} phases, of about 1{mu}m or less in size, in all of the samples examined. In addition, a number of amorphous phases were present that contained plutonium. In all the ash and ash heel samples examined, plutonium phases were found that were completely surrounded by silicate matrices. Consequently, to achieve optimum plutonium recovery in any chemical extraction process, extraction would have to be coupled with ultrafine grinding to average particle sizes of less than 1 {mu}m to liberate the plutonium from the surrounding inert matrix.

Behrens, R.G. [Los Alamos National Lab., NM (United States); Buck, E.C.; Dietz, N.L.; Bates, J.K.; Van Deventer, E.; Chaiko, D.J. [Argonne National Lab., IL (United States)

1995-09-01T23:59:59.000Z

196

SCANNING ELECTRON MICROSCOPY AND X-RAY DIFFRACTION ANALYSIS OF TANK 18 SAMPLES  

Science Conference Proceedings (OSTI)

The F-Area Tank Farm (FTF) Performance Assessment (PA) utilizes waste speciation in the waste release model used in the FTF fate and transport modeling. The waste release modeling associated with the residual plutonium in Tank 18 has been identified as a primary contributor to the Tank 18 dose uncertainty. In order to reduce the uncertainty related to plutonium in Tank 18, a better understanding of the plutonium speciation in the Tank 18 waste (including the oxidation state and stoichiometry) is desired. Savannah River National Laboratory (SRNL) utilized Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) to analyze Tank 18 samples to provide information on the speciation of plutonium in the waste material. XRD analysis of the Tank 18 samples did not identify any plutonium mineral phases in the samples. These indicates the crystalline mineral phases of plutonium are below the detection limits of the XRD method or that the plutonium phase(s) lack long range order and are present as amorphous or microcrystalline solids. SEM analysis of the Tank 18 samples did locate particles containing plutonium. The plutonium was found as small particles, usually <1 {micro}m but ranging up to several micrometers in diameter, associated with particles of an iron matrix and at low concentration in other elemental matrices. This suggests the plutonium has an affinity for the iron matrix. Qualitatively, the particles of plutonium found in the SEM analysis do not appear to account for all of the plutonium in the sample based on concentrations determined from the chemical analysis of the Tank 18 samples. This suggests that plutonium is also distributed throughout the solids in low concentrations.

Hay, M.; O'Rourke, P.; Ajo, H.

2012-03-08T23:59:59.000Z

197

Classification of Multiple Types of Organic Carbon Composition in Atmospheric Particles by Scanning Transmission X-Ray Microscopy Analysis  

Science Conference Proceedings (OSTI)

A scanning transmission X-ray microscope at the Lawrence Berkeley National Laboratory is used to measure organic functional group abundance and morphology of atmospheric aerosols. We present a summary of spectra, sizes, and shapes observed in 595 particles that were collected and analyzed between 2000 and 2006. These particles ranged between 0.1 and 12 mm and represent aerosols found in a large range of geographical areas, altitudes, and times. They include samples from seven different field campaigns: PELTI, ACE-ASIA, DYCOMS II, Princeton, MILAGRO (urban), MILAGRO (C-130), and INTEX-B. At least 14 different classes of organic particles show different types of spectroscopic signatures. Different particle types are found within the same region while the same particle types are also found in different geographical domains. Particles chemically resembling black carbon, humic-like aerosols, pine ultisol, and secondary or processed aerosol have been identified from functional group abundance and comparison of spectra with those published in the literature.

Kilcoyne, Arthur L; Takahama, S.; Gilardoni, S.; Russell, L.M.; Kilcoyne, A.L.D.

2007-05-16T23:59:59.000Z

198

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

199

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

200

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

In-situ monitoring of electron beam induced deposition by atomic force microscopy in a scanning electron microscope  

Science Conference Proceedings (OSTI)

A new type of atomic force microscope is proposed for atomic force microscopic analysis inside a scanning electron microscope. We attached a piezoresisitive atomic force microscopic cantilever to a micro manipulator to achieve a compact and guidable ... Keywords: atomic force, electron beam induced deposition, in-situ monitoring, local gas injection, micro manipulator, microscope

S. Bauerdick; C. Burkhardt; R. Rudorf; W. Barth; V. Bucher; W. Nisch

2003-06-01T23:59:59.000Z

202

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

203

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

204

Electron microscopy studies of lutetium doped erbium silicide (Er{sub 0.9}Lu{sub 0.1}){sub 5}Si{sub 4}  

Science Conference Proceedings (OSTI)

Examination of bulk microstructures of lutetium doped erbium silicide (Er{sub 0.9}Lu{sub 0.1}){sub 5}Si{sub 4} (space group: Pnma) using scanning and transmission electron microscopy (SEM, TEM) reveals the existence of thin plates of a hexagonal phase (space group: P6{sub 3}/mcm) where the stoichiometric ratio in moles between the rare earths and Si is 5 to 3, i. e the 5:3 phase. The orientation relationship between the matrix and the plates was determined as [010]{sub m} {approx} -parallel [-1010]{sub p.} This observation adds credence to the assumption that all linear features noted in alloys of the rare-earth intermetallic family R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} are of the stoichiometric ratio 5:3 and possess a common orientation relationship with the parent 5:4 alloys. - Highlights: {yields} The linear features observed in the (Er{sub 0.9}Lu{sub 0.1}){sub 5}Si{sub 4} sample are hexagonal 5:3 plates. {yields} Thickness of 5:3 plates in 5:4 alloys made by tri-arc pulling is greater than made by arc-melting. {yields} The orientation relationship between 5:3 plates and the matrix is [010]{sub m} {approx} ||[-1010]{sub p}.

Cao, Q., E-mail: qcao@iastate.edu; Chumbley, L.S.

2011-08-15T23:59:59.000Z

205

Analytical electron microscopy examination of solid reaction products in long-term test of SRL 200 waste glasses  

SciTech Connect

Alteration phases, found on the leached surfaces and present as colloids in the leachates of 200-based frit (fully active and simulated) nuclear waste glass, reacted under static test conditions, at a surface area to leachate volume ratio of 20,000 m{sup {minus}1} for 15 days to 728 days, have been examined by analytical electron microscopy. The compositions of the secondary phases were determined using x-ray energy dispersive spectroscopy and electron energy loss spectroscopy, and structural analysis was accomplished by electron diffraction. Long-term samples of simulated glass, which had undergone an acceleration of reaction after 182 days, possessed a number of silicate secondary phases, including; smectite (iron silicate and potassium iron alumina-silicate, weeksite (uranium silicate), zeolite (calcium potassium alumino-silicate), tobermorite (calcium silicate), and a pure silica phase. However, uranium silicates and smectite have also been observed in tests, which have not undergone the acceleration of reaction, in both the leachate and leached layer, suggesting that these phases are not responsible for the acceleration of reaction.

Buck, E.C.; Fortner, J.A.; Bates, J.K.; Feng, X.; Dietz, N.L.; Bradley, C.R.; Tani, B.S.

1993-12-31T23:59:59.000Z

206

Comparison of SOFC Cathode Microstructure Quantified using X-ray Nanotomography and Focused Ioni Beam-scanning Electron Microscopy  

Science Conference Proceedings (OSTI)

X-ray nanotomography and focused ion beam scanning electron microscopy (FIB-SEM) have been applied to investigate the complex 3D microstructure of solid oxide fuel cell (SOFC) electrodes at spatial resolutions of 45 nm and below. The application of near edge differential absorption for x-ray nanotomography and energy selected backscatter detection for FIB-SEM enable elemental mapping within the microstructure. Using these methods, non-destructive 3D x-ray imaging and FIB-SEM serial sectioning have been applied to compare three-dimensional elemental mapping of the LSM, YSZ, and pore phases in the SOFC cathode microstructure. The microstructural characterization of an SOFC cathode is reported based on these measurements. The results presented demonstrate the viability of x-ray nanotomography as a quantitative characterization technique and provide key insights into the SOFC cathode microstructure.

G Nelson; W Harris; J Lombardo; J Izzo Jr.; W Chiu; P Tanasini; M Cantoni; J Van herle; C Comninellis; et al.

2011-12-31T23:59:59.000Z

207

In-situ and ex-situ observations of lithium de-intercalation from LiCoO? : atomic force microscopy and transmission electron microscopy studies  

E-Print Network (OSTI)

Lithium cobalt dioxide is the most commonly used material for positive electrodes in lithium rechargeable batteries. During lithium de-intercalation from this material, ... undergoes a number of phase transitions, which ...

Clmenon, Anne

2005-01-01T23:59:59.000Z

208

Investigation of Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy  

SciTech Connect

The capture and storage of carbon dioxide and other greenhouse gases in deep geologic formations represents one of the most promising options for mitigating the impacts of greenhouse gases on global warming. In this regard, mineral-fluid interactions are of prime importance since such reactions can result in the long term sequestration of CO2 by trapping in mineral phases. Recently it has been recognized that interactions with neat to water-saturated non-aqueous fluids are of prime importance in understanding mineralization reactions since the introduced CO2 is likely to contain water initially or soon after injection and the supercritical CO2 (scCO2) is less dense than the aqueous phase which can result in a buoyant scCO2 plume contacting the isolating caprock. As a result, unraveling the molecular/microscopic mechanisms of mineral transformation in neat to water saturated scCO2 has taken on an added important. In this study, we are examining the interfacial reactions of the olivine mineral forsterite (Mg2SiO4) over a range of water contents up to and including complete water saturation in scCO2. The surface precipitates that form on the reacted forsterite grains are extremely fragile and difficult to experimentally characterize. In order to address this issue we have developed experimental protocols for preparing and imaging electron-transparent samples from fragile structures. These electron-transparent samples are then examined using a combination of STEM/EDX, FIB-TEM, and helium ion microscope (HIM) imaging (Figures 1-3). This combination of capabilities has provided unique insight into the geochemical processes that occur on scCO2 reacted mineral surfaces. The experimental procedures and protocols that have been developed also have useful applications for examining fragile structures on a wide variety of materials. This research was performed using EMSL, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research located at Pacific Northwest National Laboratory.

Arey, Bruce W.; Kovarik, Libor; Wang, Zheming; Felmy, Andrew R.

2011-10-10T23:59:59.000Z

209

Comparison of airborne asbestos levels determined by transmission electron microscopy (TEM) using direct- and indirect-transfer techniques. Final report  

SciTech Connect

A subset of air samples from a 1988 EPA study was reanalyzed for asbestos by TEM using an indirect transfer technique. The samples were originally analyzed using a direct transfer technique. The document presents the results of the reanalysis and extends the discussion to include data from six other studies. The development of the two techniques and their respective advantages and disadvantages are described. The data support the general opinion that TEM analysis of air samples using indirect transfer methods tends to provide estimates of total airborne asbestos structure concentration that are higher than those obtained using direct transfer methods. There is no single factor that can be used to convert measurements made by one method to a value that is comparable with measurements made by the other because the quantitative relationship is expected to depend on details of the sampling and analytical protocols and the nature of the asbestos in the air. The ratio of indirect measurements to direct measurements ranges from 3.8 to 1,700 for the studies considered. Additional research is needed to determine which transfer technique more accurately reflects biologically meaningful airborne asbestos concentrations. Breakdown of larger structures into smaller ones during indirect preparation does not appear to be sufficient to explain the difference in measured concentrations.

Chesson, J.; Hatfield, J.

1990-03-01T23:59:59.000Z

210

Characterization of uranium- and plutonium-contaminated soils by electron microscopy  

SciTech Connect

Electron beam techniques have been used to characterize uranium-contaminated soils from the Fernald Site in Ohio, and also plutonium-bearing `hot particles, from Johnston Island in the Pacific Ocean. By examining Fernald samples that had undergone chemical leaching it was possible to observe the effect the treatment had on specific uranium-bearing phases. The technique of Heap leaching, using carbonate solution, was found to be the most successful in removing uranium from Fernald soils, the Heap process allows aeration, which facilitates the oxidation of uraninite. However, another refractory uranium(IV) phase, uranium metaphosphate, was not removed or affected by any soil-washing process. Examination of ``hot particles`` from Johnston Island revealed that plutonium and uranium were present in 50--200 nm particles, both amorphous and crystalline, within a partially amorphous aluminum oxide matrix. The aluminum oxide is believed to have undergone a crystalline-to-amorphous transition caused by alpha-particle bombardment during the decay of the plutonium.

Buck, E.C.; Dietz, N.L.; Fortner, J.A.; Bates, J.K. [Argonne National Lab., IL (United States); Brown, N.R. [United States Department of Energy, Richland, WA (United States)

1995-03-01T23:59:59.000Z

211

EMSL: Capabilities: Microscopy  

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

Microscopy Microscopy Additional Information Meet the Microscopy Experts Related EMSL User Projects Microscopy Tools are Applied to all Science Themes Watch the Microscopy capability video on EMSL's YouTube channel and read the transcript. Microscopy brochure Quiet Wing brochure EMSL hosts a variety of sophisticated microscopy instruments, including electron microscopes, optical microscopes, scanning probe microscopes, and computer-controlled microscopes for automated particle analysis. These tools are used to image a range of sample types with nanoscale-and even atomic-resolution with applications to surface, environmental, biogeochemical, atmospheric, and biological science. Each state-of-the-art instrument and customized capability is equipped with features for specific

212

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

213

Electron Microscopy Study of Hypo-Stoichiometric Fe-Pd Nanocomposites Resulting from Combined Reaction Thermomechanical Processing  

Science Conference Proceedings (OSTI)

Hypo stoichiometric Fe-Pd binary alloys (35-45 at% Pd) were severely deformed (>90%) and subsequently aged to induce concomitant recrystallization, precipitation, and ordering. This thermomechanical processing strategy was articulated by Hornbogen [1] over thirty years ago. The resulting exchange-coupled ferromagnets contain ferrite precipitates and a complex metastable twophase lamellar transformation product comprised of ordered L10 and a metastable FCC phase. The later duplex microconstituent is suggested to form in conjunction with a so-called pseudospinodal reaction [2] involving emerging cubic and tetragonal phases, whereby phase separation and ordering result from continuous changes in composition and a reduction in symmetry, cubic to tetragonal. The deformation texture of the parent austenite is substantially retained in the transformation product, resulting in anisotropy of the magnetic properties as determined by magnetometry (VSM). This paper presents electron microscopy results elucidating the crystallography and morphology of the phase mixtures including HREM. Magnetic field annealing is also included as a branch of our thermomechanical processing strategy, and we discuss the influence of the external fields on recrystallization, precipitation, and ordering. This work was performed in cooperation with ORNL and the NHMFL and is supported by the NSF DMR.

Cantando, Elizabeth Dawn [University of Virginia; Ludtka, Gerard Michael [ORNL; Ludtka, Gail Mackiewicz- [ORNL; Soffa, William A [University of Virginia

2011-01-01T23:59:59.000Z

214

Electron Microscopy Center  

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

Publications Publications The publications listed below are based on work carried out in the EMC. Publication time period: October 1, 2009, through September 30, 2010 Published journal articles (refereed): C. An, S. Peng, Y. Sun, “Facile Synthesis of Sunlight-Driven Plasmonic AgCl:Ag Nanophotocatalysts," Adv. Mater. 22, 2570 (2010). S. Avci, Z. L. Xiao, J. Hua, A. Imre, R. Divan, J. Pearson, U. Welp, W. K. Kwok, and G. W. Crabtree, “Matching effect and dynamic phases of vortex matter in Bi2Sr2CaCu2O8 nanoribbon with a periodic array of holes,” Appl. Phys. Lett. 97, 042511 (2010). A. Belkin, V. Novosad, M. Iavarone, R. Divan, J. Hiller, T. Prolier, J. E. Pearson, and G. Karapetrov “Giant conductance anisotropy in magnetically coupled F/S/F structures,” Appl. Phys. Lett. 96, 092513 (2010)

215

Electron Microscopy Center  

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

Proposal Access Guidelines Proposal Access Guidelines One part of the EMC mission is to provide unique instrumentation and expertise to the scientific community. Important to achieving this goal is the effective management of EMC instrumentation and staff for maximum scientific impact. Broad and fair access to these resources is achieved through a proposal review process and scheduling and access policies. The type of access granted is based on the nature of the proposed work, the qualifications of the user, and the instrumentation requested. Research projects may be allocated a specific amount of instrument time or may be granted continuous access. Allocated Access: Under allocated access, a user is allocated a specific amount of instrument time to complete the proposed project. Allocated access is utilized primarily to manage instrument time for those instruments that have very high demand and for projects that require exceptional staff assistance.

216

Electron Microscopy Center  

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

Resources for EMC staff members Resources for EMC staff members Gain access to proposals and other records in the EMC proposal database There are two methods, and both require a username and password. You will have access to the following layouts: AEM Proposals for Tech Review, IVEM Proposals for Tech Review, Users' Data, and Technical Reviews. You will not be able to view Personally Identifiable Information (PII). Do not let EMC users access these layouts! Users are limited to submitting proposals via the guest login or editing their proposals via a temporary login given to them by the database administrator. The best method is to use FileMaker Pro. From the File menu, choose Open Remote, then the Host jude.cnm.anl.gov, and then the emc_proposal database. The second method is to use a web browser. The URL for the proposal database is https://pico.cnm.anl.gov/proposals. Login with your web username and password that you have received from the database administrator; these can be different from your FileMaker network login.

217

Electron Microscopy Center  

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

FEI Quanta 400F ESEM FEI Quanta 400F ESEM Instrument capabilities: Instrument specifications: Accelerating voltages: 2-30 kV Schottky FEG emitter SEI resolution (actual) at 30 kV: 3 nm at 1330 Pa; 10 nm at 2660 Pa Operating modes: SEI; BEI; specimen chamber pressures from high vacuum to 2660 Pa; various specimen chamber gases (air & water vapor standard; Ar, N2 and He also tested; other gases may be possible); XEDS (Be window – no elements below Na); telepresence. Specimen stage: 5-axis motorized Maximum sample size: 100 x 100 mm (XY) Heating (1770 K) Peltier-cooled (248 K to 328 K) Typical experiments (examples): Imaging of insulating/dielectric materials Imaging biomaterials and polymers at high water vapor pressures In situ materials processing XEDS mapping and spectrum imaging

218

Electron Microscopy Center  

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

position: 1.5 mm Users' research interests (examples): Radiation effects (fissionfusion reactor materials), radioactive waste storage, ion-beam processing (surface...

219

Electron Microscopy Center  

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

Ewoldt, Z. Liang, R. Edwin Garcia, E. A. Stach, T. D. Sands (Purdue U. and Birck Nanotechnology Center); N. J. Zaluzec (Argonne-MSD-EMC) Diamond Nanowires and the Mechanism of...

220

Electron Microscopy Center  

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

Resources Resources The EMC currently operates and administers seven full-time user instruments together with support facilities that include specimen preparation, image analysis and computational resources. The instruments are grouped below according to their function and capabilities. Detailed information about the capabilities of each user-accessible resource is available via the underlined links below. The major-capability instruments are generally available by allocated access while the core instruments are generally available by continuous access. Instrument Access Type User Status Separate Proposal? ACAT Allocated Assisted yes IVEM Allocated Assisted yes FEI Tecnai F20ST TEM/STEM Continuous or Allocated User or Assisted Any or all of these instruments may be requested in one proposal.

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Novel Approaches to Soft X-ray Spectroscopy: Scanning TransmissionX-ray Microscopy and Ambient Pressure X-Ray PhotoelectronSpectroscopy  

Science Conference Proceedings (OSTI)

This workshop focused on novel spectroscopies at Beamlines 11.0.2, 5.3.2 and 9.3.2 at the ALS. The workshop brought together users from a wide range of fields to highlight recent experimental and technical developments both in scanning transmission X-ray spectroscopy (STXM) and ambient pressure photoelectron spectroscopy (APPES). The morning session featured talks on experiments involving new developments at the STXM, while the afternoon session was devoted to those using APXPS. In the morning session, Tolek Tyliszczak discussed the improved detector developments at the STXM, such as an avalanche photodiode detector and fluorescence and electron detection, as well as the continued development of in situ cells for heating, gas flow, and electrochemical cells. Of these, only the avalanche photodiode in combination with a novel multichannel photon-counting system is in routine use in time-resolved studies. Bartel Van Waeyenberge (Ghent University) presented results of magnetic imaging with a time resolution of 70-100 ps combined with a lateral resolution of 20-40 nm performed with the STXM (Beamline 11.0.2). As a complement to the time-domain ''pump-and-probe'' measurements, they developed a frequency-domain ''sine-excitation'' technique in order to study specific eigenmodes of these ferromagnetic patterns with high spatial resolution. This new approach was used to study the gyrotropic vortex motions in micron-sized ferromagnetic patterns. Adam Hitchcock (McMaster University) presented the development, in collaboration with Daniel Guay (INRS, Varennes) and Sherry Zhang, of the apparatus and techniques for applying STXM to in-situ studies of electrochemistry, in particular electrochromism in polyaniline. In addition, substantial progress was reported on a joint project to develop substrates and methods for chemically selective lithography of multilayer polymer systems. Selective patterns, such as that displayed in the figure, can now be written efficiently with the bend magnet STXM on Beamline 5.3.2. Yves Acremann (SSRL) discussed time and spatially resolved X-ray magnetic circular dichroism (XMCD) experiments on spin transfer devices at the STXM (Beamline 11.0.2). These elegant experiments explore time resolved measurements of the magnetization dynamics within a 100 x 150 nm sample influenced by a spin-polarized current. This experiment shows that the magnetization in these magnetic nanostructures are not uniform, as they are influenced by the Oersted field of the charge current needed to generate the spin current. The implementation of a novel multichannel photon counting system in combination with an avalanche photon detector decreased the data-acquisition time by a factor of 10, owing to its ability to resolve the structure of multi bunch mode. Gordon E. Brown, Jr. (Stanford University and SSRL) described ''Applications of STXM to Microbial Bioweathering and Biomineralization''. In the interaction of bacteria with ferrihydrite nanoparticles, microenvironments that were very different than the bulk material were observed, showing that bulk thermodynamics may not be useful for predicting micro phases. Gordon also presented work showing that iron nanoparticles are attracted to the negatively charged bacteria and form a coating that reduces iron oxide minerals. The afternoon session started with presentations by Simon Mun and Hendrik Bluhm, who discussed the current status and the future plans for the two APPES end-stations at the ALS, which are located at Beamlines 9.3.2 and 11.0.2, respectively. In both end-stations, samples can be measured in gaseous environments at pressures of up to several Torr, which makes possible the investigation of numerous phenomena, in particular in the fields of atmospheric and environmental science as well as heterogeneous catalysis. Specific examples of the application of APPES were shown in the following presentations. John Hemminger (University of California, Irvine) reported on APPES investigations at Beamlines 9.3.2 and 11.0.2 of the interaction of alkali halide surfaces with water. The m

Bluhm, Hendrik; Gilles, Mary K.; Mun, Simon B.; Tyliszczak, Tolek

2006-02-01T23:59:59.000Z

222

Uranium-contaminated soils: Ultramicrotomy and electron beam analysis  

Science Conference Proceedings (OSTI)

Uranium contaminated soils from the Fernald Operation Site, Ohio, have been examined by a combination of optical microscopy, scanning electron microscopy with backscattered electron detection (SEM/BSE), and analytical electron microscopy (AEM). A method is described for preparing of transmission electron microscopy (TEM) thin sections by ultramicrotomy. By using these thin sections, SEM and TEM images can be compared directly. Uranium was found in iron oxides, silicates (soddyite), phosphates (autunites), and fluorite. Little uranium was associated with clays. The distribution of uranium phases was found to be inhomogeneous at the microscopic level.

Buck, E.C.; Dietz, N.L.; Bates, J.K.; Cunnane, J.C.

1994-04-01T23:59:59.000Z

223

3D View Inside the Skeleton with X-ray Microscopy: Imaging Bone at the  

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

3D View Inside the Skeleton with X-ray Microscopy: Imaging Bone 3D View Inside the Skeleton with X-ray Microscopy: Imaging Bone at the Nanoscale Scientists studying osteoporosis and other skeletal diseases are interested in the 3D structure of bone and its responses to conditions such as weightlessness, radiation (of particular interest to astronauts) and vitamin D deficiency. The current gold standard, micro-computed tomography (micro-CT), provides 3D images of trabeculae, the small interior struts of bone tissue, and electron microscopy can provide nanometer resolution of thin tissue slices. Hard X-ray transmission microscopy has provided the first 3D view of bone structure within individual trabeculae on the nanoscale. figure 1 Figure 1 Micro-CT (left) shows trabecular structure inside of bone. Transmission X-ray microscopy (TXM; center and right) can reveal localized details of osteocyte lacunae and their processes.

224

Application of hydrogenation to low-temperature cleaning of the Si(001) surface in the processes of molecular-beam epitaxy: Investigation by scanning tunneling microscopy, reflected high-energy electron diffraction, and high resolution transmission electron microscopy  

Science Conference Proceedings (OSTI)

Structural properties of the clean Si(001) surface obtained as a result of low-temperature (470-650 Degree-Sign C) pre-growth annealings of silicon wafers in a molecular-beam epitaxy chamber have been investigated. To decrease the cleaning temperature, a silicon surface was hydrogenated in the process of a preliminary chemical treatment in HF and NH{sub 4}F aqueous solutions. It has been shown that smooth surfaces composed of wide terraces separated by monoatomic steps can be obtained by dehydrogenation at the temperatures Greater-Than-Or-Equivalent-To 600 Degree-Sign C, whereas clean surfaces obtained at the temperatures clean surfaces on the temperature of hydrogen thermal desorption and the process of the preliminary chemical treatment. The frequency of detachment/attachment of Si dimers from/to the steps and effect of the Ehrlich-Schwoebel barrier on ad-dimer migration across steps have been found to be the most probable factors determining a degree of the resultant surface roughness.

Arapkina, L. V.; Krylova, L. A.; Chizh, K. V.; Chapnin, V. A.; Uvarov, O. V.; Yuryev, V. A. [A. M. Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Street, Moscow 119991 (Russian Federation)

2012-07-01T23:59:59.000Z

225

Deflection gating for time-resolved x-ray magnetic circular dichroism-photoemission electron microscopy using synchrotron radiation  

SciTech Connect

In this paper, we present a newly developed gating technique for a time-resolving photoemission microscope. The technique makes use of an electrostatic deflector within the microscope's electron optical system for fast switching between two electron-optical paths, one of which is used for imaging, while the other is blocked by an aperture stop. The system can be operated with a switching time of 20 ns and shows superior dark current rejection. We report on the application of this new gating technique to exploit the time structure in the injection bunch pattern of the synchrotron radiation source BESSY II at Helmholtz-Zentrum Berlin for time-resolved measurements in the picosecond regime.

Wiemann, C.; Kaiser, A. M.; Cramm, S. [Peter Gruenberg Institut PGI-6 'Electronic Properties', Research Centre Juelich, D-52425 Juelich (Germany); Schneider, C. M. [Peter Gruenberg Institut PGI-6 'Electronic Properties', Research Centre Juelich, D-52425 Juelich (Germany); Fakultaet fuer Physik and Center for Nanointegration Duisburg-Essen (CeNIDE), Universitaet Duisburg-Essen, D-47048 Duisburg (Germany)

2012-06-15T23:59:59.000Z

226

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

227

Materials Applications of Photoelectron Emission Microscopy  

SciTech Connect

Photoelectron emission microscopy (PEEM) is a versatile technique that can image a variety of materials including metals, semiconductors and even insulators. Under favorable conditions the most advanced aberration corrected instruments have a spatial resolution approaching 2 nm. Although PEEM cannot compete with transmission or scanning electron microscopies for ultimate resolution, the technique is much more gentle and has the unique advantage of imaging structure as well as electronic and magnetic states on the nanoscale. Since the image contrast is derived from spatial variations in electron photoemission intensity, PEEM is ideal for interrogating both static and dynamic electronic properties of complex nanostructured materials. PEEM can be performed using a variety of photoexcitation sources including synchrotron emission, femtosecond laser pulses and conventional UV lamp emission. Each source has advantages, for example, fs laser excitation enables time-resolved imaging for study of ultrafast dynamics of surface intermediate states while tunable synchrotron sources allow chemically specific excitation. Even more detail can be extracted from energy resolved PEEM. Here, we review the key principles and contrast mechanisms of PEEM and briefly summarize materials applications of PEEM with examples of a thermally-induced structural phase transformation in barium titanate, inter-diffusion between thin metal copper and ruthenium layers, and multiphoton imaging of polystyrene nanoparticles on a silver coated substrate.

Xiong, Gang; Shao, Rui; Peppernick, Samuel J.; Joly, Alan G.; Beck, Kenneth M.; Hess, Wayne P.; Cai, Mingdong; Duchene, J.; Wang, J. Y.; Wei, Wei

2010-12-30T23:59:59.000Z

228

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

229

Transmission Electron Microscopy Study of Nonpolar a-Plane GaN Grown by Pendeo-Epitaxy on (112_0) 4H-SiC  

E-Print Network (OSTI)

by Pendeo-Epitaxy on (1120) 4H-SiC. D.N. Zakharov 1 , Z.phase epitaxy on (1120) 4H-SiC substrates with AlN bufferPE layers were grown on 4H- SiC (1120) substrates previously

Zakharov, D.N.; Liliental-Weber, Z.; Wagner, B.; Reitmeier, Z.J.; Preble, E.A.; Davis, R.F.

2008-01-01T23:59:59.000Z

230

Analytical Transmission Electron Microscopy (ATEM) Characterization of Stress-Corrosion Cracks in LWR-Irradiated Austenitic Stainless Steel Core Components - Revision 2  

Science Conference Proceedings (OSTI)

This work was sponsored by the Cooperative IASCC Research (CIR) Program, which is an international research effort designed to address irradiation-assisted stress corrosion cracking (IASCC) in light water reactor (LWR) components. The program's goal is to develop a mechanistically based predictive methodology for IASCC and to identify potential countermeasures to mitigate IASCC.

2006-10-30T23:59:59.000Z

231

Analytical Transmission Electron Microscopy (ATEM) Characterization of Stress Corrosion Cracks in LWR-Irradiated Austenitic Stainless Steel Core Components: Revision 1  

Science Conference Proceedings (OSTI)

This work was sponsored by the Cooperative IASCC Research (CIR) Program, which is an international research effort designed to address irradiation-assisted stress corrosion cracking (IASCC) in light water reactor (LWR) components. The program's goal is to develop a mechanistically based predictive methodology for IASCC and to identify potential countermeasures to mitigate IASCC.

2003-09-17T23:59:59.000Z

232

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

233

An Equal Opportunity and Affirmative Action InstitutionDegradation of Thermal Barrier Coatings with Syngas Combustion: Testing by Hyperbaric Advanced Development Environmental Simulator and Characterization by Advanced Electron Microscopy  

E-Print Network (OSTI)

Please accept my apology in delayed delivery. Enclosed is the final technical report entitled Degradation of Thermal Barrier Coatings with Syngas Combustion: Testing by Hyperbaric Advanced Development Environmental Simulator and Characterization by Advanced Electron Microscopy, by Sohn. If you have any questions, please do not hesitate to contact me at 407-882-1181 or ysohn@mail.ucf.edu.

Dr. Richard Wenglarz; Yongho Sohn

2005-01-01T23:59:59.000Z

234

Three distinct stages of apoptotic nuclear condensation revealed by time-lapse imaging, biochemical and electron microscopy analysis of cell-free apoptosis  

SciTech Connect

During apoptotic execution, chromatin undergoes a phase change from a heterogeneous, genetically active network to an inert highly condensed form that is fragmented and packaged into apoptotic bodies. We have previously used a cell-free system to examine the roles of caspases or other proteases in apoptotic chromatin condensation and nuclear disassembly. But so far, the role of DNase activity or ATP hydrolysis in this system has not yet been elucidated. Here, in order to better define the stages of nuclear disassembly in apoptosis, we have characterized the apoptotic condensation using a cell-free system and time-lapse imaging. We demonstrated that the population of nuclei undergoing apoptosis in vitro appears to follow a reproducible program of nuclear condensation, suggesting the existence of an ordered biochemical pathway. This enabled us to define three stages of apoptotic chromatin condensation: stage 1 ring condensation; stage 2 necklace condensation; and stage 3 nuclear collapse/disassembly. Electron microscopy revealed that neither chromatin nor detectable subnuclear structures were present inside the stage 1 ring-condensed structures. DNase activity was not essential for stage 1 ring condensation, which could occur in apoptotic extracts depleted of all detectable DNase activity. However, DNase(s) were required for stage 2 necklace condensation. Finally, we demonstrated that hydrolyzable ATP is required for stage 3 nuclear collapse/disassembly. This requirement for ATP hydrolysis further distinguished stage 2 from stage 3. Together, these experiments provide the first steps towards a systematic biochemical characterization of chromatin condensation during apoptosis.

Tone, Shigenobu [Department of Biochemistry, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192 (Japan)], E-mail: tone@med.kawasaki-m.ac.jp; Sugimoto, Kenji [Laboratory of Applied Molecular Biology, Division of Bioscience and Informatics, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531 (Japan); Tanda, Kazue [Department of Biochemistry, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192 (Japan); Suda, Taiji; Uehira, Kenzo [Electron Microscope Center, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192 (Japan); Kanouchi, Hiroaki [Department of Biochemistry, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192 (Japan); Samejima, Kumiko [Wellcome Trust Centre for Cell Biology, ICMB, King's Buildings, The University of Edinburgh, Edinburgh, EH93JR, Scotland (United Kingdom); Minatogawa, Yohsuke [Department of Biochemistry, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192 (Japan); Earnshaw, William C. [Wellcome Trust Centre for Cell Biology, ICMB, King's Buildings, The University of Edinburgh, Edinburgh, EH93JR, Scotland (United Kingdom)], E-mail: Bill.Earnshaw@ed.ac.uk

2007-10-01T23:59:59.000Z

235

Forward modeling of electron microscopy  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Data Analytics for Materials Science and Manufacturing. Presentation Title...

236

Positron microscopy  

Science Conference Proceedings (OSTI)

The negative work function property that some materials have for positrons make possible the development of positron reemission microscopy (PRM). Because of the low energies with which the positrons are emitted, some unique applications, such as the imaging of defects, can be made. The history of the concept of PRM, and its present state of development will be reviewed. The potential of positron microprobe techniques will be discussed also.

Hulett, L.D. Jr.; Xu, J.

1995-02-01T23:59:59.000Z

237

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

238

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

239

Scanning Confocal Electron Microscope (SCEM)  

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

240

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

NIST Reference Materials Are 'Gold Standard' for Bio ...  

Science Conference Proceedings (OSTI)

... atomic force microscopy (AFM), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential mobility analysis (DMA ...

2012-03-19T23:59:59.000Z

242

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

243

Stress Corrosion Crack Growth Rate Testing and Analytical Electron Microscopy of Alloy 600 as a Function of Pourbaix Space and Microstructure  

DOE Green Energy (OSTI)

Stress corrosion crack (SCC) growth rate tests and analytical electron microscopy (AEM) studies were performed over a broad range of environments and heat treatments of Alloy 600. This effort was conducted to correlate bulk environmental conditions such as pH and electrochemical potential (EcP) with the morphology of the SCC crack. Development of a library of AEM morphologies formed by SCC in different environments is an important step in identifying the conditions that lead to SCC in components. Additionally, AEM examination of stress corrosion cracks formed in different environments and microstructures lends insight into the mechanism(s) of stress corrosion cracking. Testing was conducted on compact tension specimens in three environments: a mildly acidic oxidizing environment containing sulfate ions, a caustic environment containing 10% NaOH, and hydrogenated near-neutral buffered water. Additionally, stress corrosion cracking testing of a smooth specimen was conducted in hydrogenated steam. The following heat treatments of Alloy 600 were examined: mill annealed at 980 C (near-neutral water), mill annealed at 1010 C (steam), sensitized (acid and caustic), and mill annealed + healed to homogenize the grain boundary Cr concentration (caustic). Crack growth rate (CGR) testing showed that sensitized Alloy 600 tested in the mildly acidic, oxidizing environment containing sulfate ions produced the fastest cracking ({approx} 8.8 {micro}m/hr at 260 C), and AEM examination revealed evidence of sulfur segregation to the crack tip. The caustic environment produced slower cracking ({approx} 0.4 {micro}m/hr at 307 C) in the mill annealed + healed heat treatment but no observed cracking in the sensitized condition. In the caustic environment, fully oxidized carbides were present in the crack wake but not ahead of the crack tip. In near-neutral buffered water at 338 C, the CGR was a function of dissolved hydrogen in the water and exhibited a maximum (0.17 {micro}m/hr) near the transition between Ni and NiO stability. The cracks in near-neutral hydrogenated water exhibited Cr-rich spinels and NiO-type oxides but no significant oxidation of grain boundary carbides. No clear effect of dissolved hydrogen on the crack wake morphology was apparent. In hydrogenated steam testing of a smooth specimen (CGR estimated as {approx} 0.7 {micro}m/hr at 399 C), metallic nickel nodules were evident in both the crack wake and on the specimen surface. Oxide particles having a similar size and shape to the microstructural carbides were found in the crack wake, suggesting that these particles are carbides that were oxidized by contact with the steam. The present results show that different environments often produce unique crack tip morphologies that can be identified via AEM.

N. Lewis; S.A. Attanasio; D.S. Morton; G.A. Young

2000-10-04T23:59:59.000Z

244

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

245

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...

246

Short Course Agricultural Microscopy  

Science Conference Proceedings (OSTI)

Short Course in Agricultural Microscopy. Fargo North Dakota held June 13-16 2011. Sponsored by the Agricultural Microscopy Division of AOCS and the Great Plains Institute of Food Safety. Short Course Agricultural Microscopy Short Courses ...

247

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...

248

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...

249

Uranium-contaminated soils: Ultramicrotomy and electron beam analysis  

Science Conference Proceedings (OSTI)

Uranium-contaminated soils from the U.S. Department of Energy (DOE) Fernald Site, Ohio, have been examined by a combination of scanning electron microscopy with backscattered electron imaging (SEM/BSE) and analytical electron microscopy (AEM). The inhomogeneous distribution of particulate uranium phases in the soil required the development of a method for using ultramicrotomy to prepare transmission electron microscopy (TEM) thin sections of the SEM mounts. A water-miscible resin was selected that allowed comparison between SEM and TEM images, permitting representative sampling of the soil. Uranium was found in iron oxides, silicates (soddyite), phosphates (autunites), and fluorite (UO{sub 2}). No uranium was detected in association with phyllosilicates in the soil.

Buck, E.C.; Dietz, N.L.; Bates, J.K.; Cunnane, J.C.

1994-02-01T23:59:59.000Z

250

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

251

Agricultural Microscopy Division Of Interest  

Science Conference Proceedings (OSTI)

Agricultural Microscopy, Reports, Journals, Websites Agricultural Microscopy Division Of Interest Agricultural Microscopy agri-food sector agricultural Agricultural Microscopy analytical aocs articles biotechnology courses detergents division divisions f

252

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...

253

Agricultural Microscopy Division  

Science Conference Proceedings (OSTI)

The Agricultural Microscopy Division advances visual imaging in discerning the quality and content of ingredients and finished products of the feed, fertilizer, seed, and agri-food sectors. Agricultural Microscopy Division Divisions achievement ag

254

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

255

Focused ion beam patterned Fe thin films A study by selective area Stokes polarimetry and soft x-Ray microscopy  

Science Conference Proceedings (OSTI)

We demonstrate the potential to modify the magnetic behavior and structural properties of ferromagnetic thin films using focused ion beam 'direct-write' lithography. Patterns inspired by the split-ring resonators often used as components in meta-materials were defined upon 15 nm Fe films using a 30 keV Ga{sup +} focused ion beam at a dose of 2 x 10{sup 16} ions cm{sup -2}. Structural, chemical and magnetic changes to the Fe were studied using transmission soft X-ray microscopy at the ALS, Berkeley CA. X-ray absorption spectra showed a 23% reduction in the thickness of the film in the Ga irradiated areas, but no chemical change to the Fe was evident. X-ray images of the magnetic reversal process show domain wall pinning around the implanted areas, resulting in an overall increase in the coercivity of the film. Transmission electron microscopy showed significant grain growth in the implanted regions.

Cook, P. J.; Shen, T. H.; Grundy, P. J.; Im, M.-Y.; Fischer, P.; Morton, S. A.; Kilcoyne, A. L. D.

2010-11-14T23:59:59.000Z

256

In situ investigation of ion-induced dewetting of a thin iron-oxide film on silicon by high resolution scanning electron microscopy  

SciTech Connect

Using our new in situ high resolution scanning electron microscope, which is integrated into the UNILAC ion beamline at the Helmholtzzentrum fuer Schwerionenforschung (GSI) in Darmstadt, Germany, we investigated the swift heavy ion induced dewetting of a thin iron oxide layer on Si. Besides heterogeneous hole nucleation at defects and spontaneous (homogeneous) hole nucleation, we could clearly identify a dewetting mechanism, which is similar to the spinodal dewetting observed for liquid films. Instead of being due to capillary waves, it is based on a stress induced surface instability. The latter results in the formation of a wavy surface with constant dominant wave-length and increasing amplitude during ion irradiation. Dewetting sets in as soon as the wave-troughs reach the film-substrate interface. Inspection of the hole radii and rim shapes indicates that removal of the material from the hole area occurs mainly by plastic deformation at the inner boundary and ion induced viscous flow in the peripheral zone due to surface tension.

Amirthapandian, S. [Institut fuer Halbleiteroptik und Funktionelle Grenzflaechen, Universitaet Stuttgart, 70569 Stuttgart (Germany); Material Physics Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102 (India); Schuchart, F.; Garmatter, D.; Bolse, W. [Institut fuer Halbleiteroptik und Funktionelle Grenzflaechen, Universitaet Stuttgart, 70569 Stuttgart (Germany)

2012-11-15T23:59:59.000Z

257

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...

258

Construction of a Self-Contained Liquid/Gaseous ...  

Science Conference Proceedings (OSTI)

... for Transmission Electron Microscopy An In ... inside the Transmission Electron Microscope (TEM). ... high-vacuum transmission electron microscopes. ...

259

Monitoring charge storage processes in nanoscale oxides using electrochemical scanning probe microscopy.  

Science Conference Proceedings (OSTI)

Advances in electrochemical energy storage science require the development of new or the refinement of existing in situ probes that can be used to establish structure - activity relationships for technologically relevant materials. The drive to develop reversible, high capacity electrodes from nanoscale building blocks creates an additional requirement for high spatial resolution probes to yield information of local structural, compositional, and electronic property changes as a function of the storage state of a material. In this paper, we describe a method for deconstructing a lithium ion battery positive electrode into its basic constituents of ion insertion host particles and a carbon current collector. This model system is then probed in an electrochemical environment using a combination of atomic force microscopy and tunneling spectroscopy to correlate local activity with morphological and electronic configurational changes. Cubic spinel Li{sub 1+x}Mn{sub 2-x}O{sub 4} nanoparticles are grown on graphite surfaces using vacuum deposition methods. The structure and composition of these particles are determined using transmission electron microscopy and Auger microprobe analysis. The response of these particles to initial de-lithiation, along with subsequent electrochemical cycling, is tracked using scanning probe microscopy techniques in polar aprotic electrolytes (lithium hexafluorophosphate in ethylene carbonate:diethylcarbonate). The relationship between nanoparticle size and reversible ion insertion activity will be a specific focus of this paper.

Zavadil, Kevin Robert; Lu, Ping; Huang, Jian Yu

2010-11-01T23:59:59.000Z

260

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

262

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

263

Epitaxial BaTiO{sub 3}(100) films on Pt(100): A low-energy electron diffraction, scanning tunneling microscopy, and x-ray photoelectron spectroscopy study  

Science Conference Proceedings (OSTI)

The growth of epitaxial ultrathin BaTiO{sub 3} films on a Pt(100) substrate has been studied by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and x-ray photoelectron spectroscopy (XPS). The films have been prepared by radio-frequency-assisted magnetron sputter deposition at room temperature and develop a long-range order upon annealing at 900 K in O{sub 2}. By adjusting the Ar and O{sub 2} partial pressures of the sputter gas, the stoichiometry was tuned to match that of a BaTiO{sub 3}(100) single crystal as determined by XPS. STM reveals the growth of continuous BaTiO{sub 3} films with unit cell high islands on top. With LEED already for monolayer thicknesses, the formation of a BaTiO{sub 3}(100)-(1 x 1) structure has been observed. Films of 2-3 unit cell thickness show a brilliant (1 x 1) LEED pattern for which an extended set of LEED I-V data has been acquired. At temperatures above 1050 K the BaTiO{sub 3} thin film starts to decay by formation of vacancy islands. In addition (4 x 4) and (3 x 3) surface reconstructions develop upon prolonged heating.

Foerster, Stefan; Huth, Michael; Schindler, Karl-Michael; Widdra, Wolf [Institute of Physics, Martin-Luther-Universitaet Halle-Wittenberg, Halle (Germany)

2011-09-14T23:59:59.000Z

264

Compressed sensing for fast electron microscopy  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Data Analytics for Materials Science and Manufacturing. Presentation Title...

265

Scanning Electron Microscopy Education Outreach Program  

Science Conference Proceedings (OSTI)

May 1, 2007 ... TMS Member price: 10.00. Non-member price: 25.00. TMS Student Member price : 10.00. Product In Stock. Description This paper describes an...

266

NCEM National Center for Electron Microscopy  

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

NCEM Staff Becoming an NCEM User Assistance and Collaboration Visiting Scientist Program Contact Information Manage Proposals Microscope Scheduling Microscopes and Facilities...

267

Grand Opening Slated for Electron Microscopy Facility  

Science Conference Proceedings (OSTI)

Sep 12, 2013 ... You are not signed in | Login here | New User? .... This truly unique facility exemplifies The Ohio State University's excellence-to-eminence...

268

Scanning electron microscopy imaging of hydraulic cement ...  

Science Conference Proceedings (OSTI)

... Cement clinker is manufactured from a finely-ground, homogenized blend of limestone, shale and iron ore sintered in a rotary kiln to temperatures ...

2004-11-23T23:59:59.000Z

269

Structural Stability of Udimet-500, A Nickel-Base Superalloy  

Science Conference Proceedings (OSTI)

transmission electron microscopy, and electron ... transmission elec- tron microscopy of replicas ... nature and distribution of precipitated phases. Holding for 4...

270

Argonne CNM: X-Ray Microscopy Capabilities  

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

X-Ray Microscopy Facilities X-Ray Microscopy Facilities The Hard X-Ray Nanoprobe (HXN) facility provides scanning fluorescence, scanning diffraction, and full-field transmission and tomographic imaging capabilities with a spatial resolution of 30 nm over a spectral range of 6-12 keV. Modes of Operation Full-Field Transmission Imaging and Nanotomography X-ray transmission imaging uses both the absorption and phase shift of the X-ray beam by the sample as contrast mechanisms. Absorption contrast is used to map the sample density. Elemental constituents can be located by using differential edge contrast in this mode. Phase contrast can be highly sensitive to edges and interfaces even when the X-ray absorption is weak. These contrast mechanisms are exploited to image samples rapidly in full-field transmission mode under various environmental conditions, or combined with nanotomography methods to study the three-dimensional structure of complex and amorphous nanomaterials with the HXN.

271

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

272

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

273

Historical Publications of the Electron Physics Group, 1990 ...  

Science Conference Proceedings (OSTI)

... DT Pierce, in Handbook of Microscopy ... Modification of Materials: Fundamentals and Applications ... Polarized Electrons in Fundamental Electron-Atom ...

2013-04-10T23:59:59.000Z

274

Nonlinear vibrational microscopy  

SciTech Connect

The present invention is a method and apparatus for microscopic vibrational imaging using coherent Anti-Stokes Raman Scattering or Sum Frequency Generation. Microscopic imaging with a vibrational spectroscopic contrast is achieved by generating signals in a nonlinear optical process and spatially resolved detection of the signals. The spatial resolution is attained by minimizing the spot size of the optical interrogation beams on the sample. Minimizing the spot size relies upon a. directing at least two substantially co-axial laser beams (interrogation beams) through a microscope objective providing a focal spot on the sample; b. collecting a signal beam together with a residual beam from the at least two co-axial laser beams after passing through the sample; c. removing the residual beam; and d. detecting the signal beam thereby creating said pixel. The method has significantly higher spatial resolution then IR microscopy and higher sensitivity than spontaneous Raman microscopy with much lower average excitation powers. CARS and SFG microscopy does not rely on the presence of fluorophores, but retains the resolution and three-dimensional sectioning capability of confocal and two-photon fluorescence microscopy. Complementary to these techniques, CARS and SFG microscopy provides a contrast mechanism based on vibrational spectroscopy. This vibrational contrast mechanism, combined with an unprecedented high sensitivity at a tolerable laser power level, provides a new approach for microscopic investigations of chemical and biological samples.

Holtom, Gary R. (Richland, WA); Xie, Xiaoliang Sunney (Richland, WA); Zumbusch, Andreas (Munchen, DE)

2000-01-01T23:59:59.000Z

275

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

276

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...

277

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...

278

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...

279

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

280

Agricultural Microscopy Division List  

Science Conference Proceedings (OSTI)

Name AffiliationCity, State, CountryAgricultural Microscopy Division2013 Members72 Members as of October 1, 2013Ajbani, RutviInstitute of Chemical TechnologyMumbai, MH, IndiaAlonso, CarmenPuerto Rico Dept ofAgricultureDorado, Puerto RicoArmbrust, KevinLoui

Note: This page contains sample records for the topic "transmission electron microscopy" 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

UNIVERSITY OF CALIFORNIA, SANTA CRUZ Life Sciences Microscopy Center Facilities Manager  

E-Print Network (OSTI)

analysis; instrument maintenance and technical support; usage management; maintaining the facility web site or training in a higher-education environment; expertise in both light microscopy and electron microscopy

California at Santa Cruz, University of

282

Biological Imaging by Soft X-Ray Diffraction Microscopy  

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

Biological Imaging by Soft X-Ray Diffraction Microscopy Print Electron and x-ray microscopes are a valuable tool for both the life and materials sciences, but they are limited in...

283

Basic Design of the Scanning Electron Microscope  

Science Conference Proceedings (OSTI)

...H.E. Exner and S. Weinbruch, Scanning Electron Microscopy, Metallography and Microstructures, Vol 9, ASM Handbook,

284

Novel Microscopy Techniques  

Science Conference Proceedings (OSTI)

Oct 19, 2011 ... Atomic Imaging of Surface and Bulk with an Aberration Corrected Scanning Electron Microscope: Yimei Zhu1; 1Brookhaven National...

285

NIST Electron and Optical Physics Division - 2001  

Science Conference Proceedings (OSTI)

... of long standing within the Division is scanning electron microscopy with ... of magnetic structures via analysis of the spins of ejected electrons. ...

286

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.

287

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

288

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

289

TEM and CBED Techniques for the Study of Point Defect Structure of ...  

Science Conference Proceedings (OSTI)

Convergent beam electron diffraction (CBED) and transmission electron microscopy (TEM) results have been compared to Java electron microscopy simulation...

290

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.

291

Agricultural Microscopy Newsletter March 11  

Science Conference Proceedings (OSTI)

AOCS Agricultural Microscopy Division Newsletter March 2011 Greetings from the Chairperson The Agricultural Microscopy Division would like to take this opportunity to express our sincere sympathy to the family and friends of George Liepa who rece

292

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

293

The Measurement of MTFs in X-ray Microscopy Using Diffractograms  

Science Conference Proceedings (OSTI)

A novel method to characterize the optical performance of a high-resolution transmission x-ray microscope is presented. It makes use of test patterns that consist of random arrays of sub-resolution holes in a thin metal film, and so approximate to white-noise input signals for the microscope. The test patterns have been fabricated by electron-beam lithography at length scales appropriate for the resolution available in x-ray microscopy, so that diffractograms produced from the image data can be directly interpreted in terms of the contrast transfer function of the optical system. Results of this method are shown for both brightfield and differential phase contrast imaging.

Morrison, G. R. [King's College London, Dept. of Physics, Strand, London WC2R 2LS (United Kingdom); Charalambous, P. S. [ZonePlates Ltd, 8 South Way, Claverings Industrial Estate, London N9 0AB (United Kingdom); Gianoncelli, A.; Kaulich, B. [Sincrotrone Trieste S.C.p.A., S.S. 14, km 163.5 in Area Science Park, 34149 Trieste (Italy)

2011-09-09T23:59:59.000Z

294

Are Electron Tweezers Possible? Apparently So.  

Science Conference Proceedings (OSTI)

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

2012-10-02T23:59:59.000Z

295

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

296

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

297

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

298

A Networked Scanning Electron Microscope  

Science Conference Proceedings (OSTI)

Featured Overview. A New ParadigmMulti-User Scanning Electron Microscopy. L.S. Chumbley, M. Meyer, K. Fredrickson, and F.C. Laabs. Introduction; System...

299

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

300

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Instrument Series: Microscopy  

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

Quanta 3D FEG Quanta 3D FEG This instrument is now available in EMSL's Radiochemistry Annex. The Quanta 3D FEG is the most versatile high-resolution, low vacuum SEM/FIB for 2D and 3D material characterization and analysis. Featuring three imaging modes - high vacuum, low vacuum and ESEM - it accommodates the widest range of samples of any SEM system. The Quanta 3D FEG's novel, field-emission electron source delivers clear and sharp electron imaging and increased electron beam current enhances EDS and EBSP analysis. This system also offers the capability for in situ study of the dynamic behavior of materials at different humidity levels (up to 100% RH) and temperatures (up to 1500 °C). Quanta 3D FEG's unprecedented high- current FIB enables fast material removal.

302

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

303

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

304

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

305

Agricultural Microscopy Division Newsletter September 2013  

Science Conference Proceedings (OSTI)

Read the latest news from the Agricultural Microscopy division. Agricultural Microscopy Division Newsletter September 2013 Agricultural Microscopy Division Newsletter September 2013 ...

306

Mapping Ionic Currents and Reactivity on the Nanoscale: Electrochemical Strain Microscopy  

DOE Green Energy (OSTI)

Solid-state electrochemical processes in oxides underpin a broad spectrum of energy and information storage devices, ranging from Li-ion and Li-air batteries, to solid oxide fuel cells (SOFC) to electroresistive and memristive systems. These functionalities are controlled by the bias-driven diffusive and electromigration transport of mobile ionic species, as well as intricate a set of electrochemical and defect-controlled reactions at interfaces and in bulk. Despite the wealth of device-level and atomistic studies, little is known on the mesoscopic mechanisms of ion diffusion and electronic transport on the level of grain clusters, individual grains, and extended defects. The development of the capability for probing ion transport on the nanometer scale is a key to deciphering complex interplay between structure, functionality, and performance in these systems. Here we introduce Electrochemical Strain Microscopy, a scanning probe microscopy technique based on strong strain-bias coupling in the systems in which local ion concentrations are changed by electrical fields. The imaging capability, as well as time- and voltage spectroscopies analogous to traditional current based electrochemical characterization methods are developed. The reversible intercalation of Li and mapping electrochemical activity in LiCoO2 is demonstrated, illustrating higher Li diffusivity at non-basal planes and grain boundaries. In Si-anode device structure, the direct mapping of Li diffusion at extended defects and evolution of Li-activity with charge state is explored. The electrical field-dependence of Li mobility is studied to determine the critical bias required for the onset of electrochemical transformation, allowing reaction and diffusion processes in the battery system to be separated at each location. Finally, the applicability of ESM for probing oxygen vacancy diffusion and oxygen reduction/evolution reactions is illustrated, and the high resolution ESM maps are correlated with aberration corrected scanning transmission electron microscopy imaging. The future potential for deciphering mechanisms of electrochemical transformations on an atomically-defined single-defect level is discussed.

Kalinin, S.V. (Center for Nanophase Materials Sciences, ORNL)

2010-10-19T23:59:59.000Z

307

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...

308

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...

309

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

310

Ultrafast scanning probe microscopy  

DOE Patents (OSTI)

An ultrafast scanning probe microscopy method for achieving subpicosecond-temporal resolution and submicron-spatial resolution of an observation sample. In one embodiment of the present claimed invention, a single short optical pulse is generated and is split into first and second pulses. One of the pulses is delayed using variable time delay means. The first pulse is then directed at an observation sample located proximate to the probe of a scanning probe microscope. The scanning probe microscope produces probe-sample signals indicative of the response of the probe to characteristics of the sample. The second pulse is used to modulate the probe of the scanning probe microscope. The time delay between the first and second pulses is then varied. The probe-sample response signal is recorded at each of the various time delays created between the first and second pulses. The probe-sample response signal is then plotted as a function of time delay to produce a cross-correlation of the probe sample response. In so doing, the present invention provides simultaneous subpicosecond-temporal resolution and submicron-spatial resolution of the sample.

Weiss, Shimon (El Cerrito, CA); Chemla, Daniel S. (Kensington, CA); Ogletree, D. Frank (El Cerrito, CA); Botkin, David (San Francisco, CA)

1995-01-01T23:59:59.000Z

311

Ultrafast scanning probe microscopy  

DOE Patents (OSTI)

An ultrafast scanning probe microscopy method is described for achieving subpicosecond-temporal resolution and submicron-spatial resolution of an observation sample. In one embodiment of the present claimed invention, a single short optical pulse is generated and is split into first and second pulses. One of the pulses is delayed using variable time delay means. The first pulse is then directed at an observation sample located proximate to the probe of a scanning probe microscope. The scanning probe microscope produces probe-sample signals indicative of the response of the probe to characteristics of the sample. The second pulse is used to modulate the probe of the scanning probe microscope. The time delay between the first and second pulses is then varied. The probe-sample response signal is recorded at each of the various time delays created between the first and second pulses. The probe-sample response signal is then plotted as a function of time delay to produce a cross-correlation of the probe sample response. In so doing, the present invention provides simultaneous subpicosecond-temporal resolution and submicron-spatial resolution of the sample. 6 Figs.

Weiss, S.; Chemla, D.S.; Ogletree, D.F.; Botkin, D.

1995-05-16T23:59:59.000Z

312

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

313

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

314

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

315

Vector potential photoelectron microscopy  

SciTech Connect

A new class of electron microscope has been developed for the chemical microanalysis of a wide range of real world samples using photoelectron spectroscopy. Highly structured, three-dimensional samples, such as fiber mats and fracture surfaces can be imaged, as well as insulators and magnetic materials. The new microscope uses the vector potential field from a solenoid magnet as a spatial reference for imaging. A prototype instrument has demonstrated imaging of uncoated silk, magnetic steel wool, and micron-sized single strand tungsten wires.

Browning, R. [R. Browning Consultants, 14 John Street, Shoreham, New York 11786 (United States)

2011-10-15T23:59:59.000Z

316

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.

317

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

318

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

319

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

320

Geometric and Electronic Structure of Closed Graphene Edges  

SciTech Connect

We report theoretical and experimental results on single and multiple looped graphene sheets. Experimental images of stable closed-edge structures in few-layer graphene samples obtained by high-resolution transmission electron microscopy (HRTEM) are compared with first- principles density functional theory calculations. We demonstrate that the electronic structure of a graphene nanoribbon is not significantly perturbed upon closing. By contrast, a significant modulation of the electronic structure is observed for closed-edge graphene structures deposited on a planar graphene substrate. This effect is due to an enhanced reactivity of the looped (coalesced) edges observed experimentally. The coexistence of different degrees of curvature in the graphene sheet induced by folding indicates that these materials could be used for surface chemistry engineering.

Lopez-Benzanilla, Alejandro [Oak Ridge National Laboratory (ORNL); Campos-Delgado, Jessica [IPICyT; Sumpter, Bobby G [ORNL; Baptista, Daniel [National Institute of Metrology, Duque de Caxias, Brazil; Hayashi, Takuya [Institute of Carbon Science and Technology, Shinshu Unversity; Kim, Y A [Shinshu University; Muramatsu, H [Shinshu University; Endo, M [Shinshu University; Achete, Carlos [National Institute of Metrology, Duque de Caxias, Brazil; Terrones, M. [Universidad Carlos III, Madrid, Spain; Meunier, Vincent [ORNL

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

322

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

323

3D/4D/5D visualization of material at nano-scale using Transmission...  

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

3D4D5D visualization of material at nano-scale using Transmission X-ray Microscopy Wednesday, May 22, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Yijin Liu, SSRL The...

324

Effects of Segregation in Nickel-Base Superalloys: Dendritic Stresses  

Science Conference Proceedings (OSTI)

formation was investigated using scanning electron microscopy. (SEM), their effect on dislocation mobility by transmission electron microscopy (TEM). Figure 1 .

325

Historical Publications of the Electron Physics Group, 1980 ...  

Science Conference Proceedings (OSTI)

... of Spin Polarized Secondary Electrons in Transition ... Analysis in a Scanning Electron Microscope, J. Unguris ... and DT Pierce, J. Microscopy 139, RP1 ...

2013-04-26T23:59:59.000Z

326

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

327

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

328

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...

329

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...

330

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

331

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...

332

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

333

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

334

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

335

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

336

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.

337

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

338

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...

339

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

340

Feed Microscopy Laboratory Proficiency Testing Program  

Science Conference Proceedings (OSTI)

Lab Proficiency Testing service for Feed Microscopy using microscopic examination of animal feed samples and AAFCO terminology. Feed Microscopy Laboratory Proficiency Testing Program Agricultural Microscopy agri-food sector agricultural Agricultural Micr

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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...

342

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...

343

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,...

344

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)

345

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

346

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:

347

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

348

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 FERCs 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

349

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

350

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

351

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

352

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

353

X-Ray Diffraction Microscopy of Magnetic Structures  

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

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

354

X-Ray Diffraction Microscopy of Magnetic Structures  

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

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

355

X-Ray Diffraction Microscopy of Magnetic Structures  

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

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

356

Smart EFTEM-SI: A New Acquisition Procedure for Quantitative ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Energy-filtering transmission electron microscopy (EFTEM) in ... A Hollow-Cone Dark Field (HCDF) Transmission Electron Microscopy (TEM)...

357

Microscopy for STEM Educators - SPIE Conference 2012  

Science Conference Proceedings (OSTI)

SPIE Conference 2012. SPIE Conference 2012. ... Microscopy for STEM Educators - SPIE Conference 2012. Sound interesting? ...

2012-05-09T23:59:59.000Z

358

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

359

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

360

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

362

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...

363

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...

364

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

365

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

366

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

367

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

368

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

369

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...

370

Modulated microwave microscopy and probes used therewith  

Science Conference Proceedings (OSTI)

A microwave microscope including a probe tip electrode vertically positionable over a sample and projecting downwardly from the end of a cantilever. A transmission line connecting the tip electrode to the electronic control system extends along the cantilever and is separated from a ground plane at the bottom of the cantilever by a dielectric layer. The probe tip may be vertically tapped near or at the sample surface at a low frequency and the microwave signal reflected from the tip/sample interaction is demodulated at the low frequency. Alternatively, a low-frequency electrical signal is also a non-linear electrical element associated with the probe tip to non-linearly interact with the applied microwave signal and the reflected non-linear microwave signal is detected at the low frequency. The non-linear element may be semiconductor junction formed near the apex of the probe tip or be an FET formed at the base of a semiconducting tip.

Lai, Keji; Kelly, Michael; Shen, Zhi-Xun

2012-09-11T23:59:59.000Z

371

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

372

BK virus has tropism for human salivary gland cells in vitro: Implications for transmission  

Science Conference Proceedings (OSTI)

Background: In this study, it was determined that BKV is shed in saliva and an in vitro model system was developed whereby BKV can productively infect both submandibular (HSG) and parotid (HSY) salivary gland cell lines. Results: BKV was detected in oral fluids using quantitative real-time PCR (QRTPCR). BKV infection was determined using quantitative RT-PCR, immunofluorescence and immunoblotting assays. The infectivity of BKV was inhibited by pre-incubation of the virus with gangliosides that saturated the major capsid protein, VP1, halting receptor mediated BKV entry into salivary gland cells. Examination of infected cultures by transmission electron microscopy revealed 45-50 nm BK virions clearly visible within the cells. Subsequent to infection, encapsidated BK virus was detected in the supernatant. Conclusion: We thus demonstrated that BKV was detected in oral fluids and that BK infection and replication occur in vitro in salivary gland cells. These data collectively suggest the potential for BKV oral route of transmission and oral pathogenesis.

Jeffers, Liesl K. [Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599 (United States); Madden, Vicki [Department of Pathology, School of Medicine, University of North Carolina, Chapel Hill, NC 27599 (United States); Webster-Cyriaque, Jennifer, E-mail: jennifer@med.unc.ed [Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599 (United States); Department of Dental Ecology, School of Dentistry, University of North Carolina, Chapel Hill, NC 27599 (United States)

2009-11-25T23:59:59.000Z

373

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

374

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

375

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

376

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

377

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

378

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

379

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

380

NCEM National Center for Electron Microscopy: Heating holder guidelines  

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

Heating holder guidelines Heating holder guidelines If you plan to use heating holders for in-situ experiments, we require your careful review and compliance with the following guidelines. 1. Include in your proposal target temperature and all phase diagrams of material with those of the tantalum furnaces and tantalum and/or molybdenum washers. Eutectic melting or bonding to the furnace body can occur at much lower temperatures than expected. 2. Holders are individually marked with the maximum temperature displayed on the specimen rod. Do not exceed this marked maximum temperature. It is easy to overshoot target temperature, so approach with caution. 3. Pre-schedule time for technical training and assistance by NCEM staff, especially if you are an infrequent or first-time user.

Note: This page contains sample records for the topic "transmission electron microscopy" 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

In-situ Studies with Electron Microscopy Techniques  

Science Conference Proceedings (OSTI)

Oct 10, 2012 ... Observation and Control of Catalyst Phase during the Growth of Semiconductor Nanowires: Frances Ross1; 1IBM T. J. Watson Research...

382

Advanced Electron Microscopy Techniques for the Study of Tribology  

Science Conference Proceedings (OSTI)

... Martin Company, for the United Stated Department of Energy's (DOE) National Nuclear Security Administration (NNSA) under contract DE-AC0494AL85000.

383

Failure Analysis of a Rupture Disk Assembly by Electron Microscopy ...  

Science Conference Proceedings (OSTI)

Symposium, Charles R. Morin Memorial Symposium on Failure Analysis and ... Tools for Failure Event Database Management and Probability Risk Analysis for...

384

Laboratory design for high-performance electron microscopy  

E-Print Network (OSTI)

environment. Electromagnetic interference and stray magneticTo minimize electromagnetic interference, all power conduits

2004-01-01T23:59:59.000Z

385

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

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

Assistance and Collaboration Extended help and collaborations at NCEM Most NCEM users are accomplished microscopists and only require some technical assistance to make full use of...

386

NCEM National Center for Electron Microscopy: Microscope Driving...  

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

Microscope Driving Tests 3010 test.pdf CM 200 test.pdf CM 300 test.pdf Libra test.pdf FIB test.pdf Tecnai test.pdf TEAM 0.5 test.pdf TEAM I test.pdf...

387

Electron Microscopy: Its Role in Materials Science, The Mike Meshii ...  

Science Conference Proceedings (OSTI)

Mar 1, 2003 ... Out of Print. Description This collection of papers from the upcoming 2003 TMS Annual Meeting & Exhibition captures current research activities...

388

Conventional And Analytical Electron Microscopy Study Of Phase ...  

Science Conference Proceedings (OSTI)

What Can we Learn from Atomic Scale Calculations of Grain Boundary Properties? What Can We Learn from Measurements of Li-ion Battery Single Particles?

389

THE ELECTRON MICROSCOPY OF HYDROCARBON PRODUCTION IN PARTHENIUM ARGENTATUM (GUAYULE)  

E-Print Network (OSTI)

other drawbacks. First, the fusion reactors currently underproblem of its own. the fusion reactor makes the structuralFusion research (II): Detailed Science, 19l, 38. and small terns reactor

Bauer, T.E.

2010-01-01T23:59:59.000Z

390

THE ELECTRON MICROSCOPY OF HYDROCARBON PRODUCTION IN PARTHENIUM ARGENTATUM (GUAYULE)  

E-Print Network (OSTI)

investigation of solar-related alternative energy sources.B. Non~Solar Energy Alternatives . u C. Solar~RelatedThese alternatives are hydropower, and energy derived from

Bauer, T.E.

2010-01-01T23:59:59.000Z

391

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

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

3010 In-Situ 3010 In-Situ AEME The 300 kV JEOL 3010 offers greater specimen penetration than 200kV instruments, with significantly improved spatial resolution and probe forming capabilities. The side-entry stage allows ±45° tilt and can be operated with piezo-drift compensation. A flexible condenser system permits CBED, LACBED, and imaging with hollow cone and Koehler illumination. In addition to a standard film camera, a Gatan Orius CCD, and a Gatan 622 intensified TV camera and VCR are available for recording experiments at video rates. Specific capabilities include: high-resolution imaging at 2.1Å and ±40° tilt during simultaneous heating; very-high-resolution imaging at 1.7 Å and ±10° tilt during simultaneous heating; and high magnification Lorentz and Foucault imaging of magnetic samples. Various

392

THE ELECTRON MICROSCOPY OF HYDROCARBON PRODUCTION IN PARTHENIUM ARGENTATUM (GUAYULE)  

E-Print Network (OSTI)

natural gas left, and oil reserves are variously estimatedlonger estimates for oil reserves depend upon the obtainingoil and gas often mentioned and cur- rently being developed is coal. The United States possesses coal reserves

Bauer, T.E.

2010-01-01T23:59:59.000Z

393

The EMC Specimen Preparation Laboratory The Electron Microscopy...  

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

RCRA waste: F003, U159, ignitable. Methyl ethyl ketone RCRA waste: F005, U159, D035 (TCLP > 200 mgl), ignitable. MICRO cleaning solution Mineral oil 5 mgm 3 (mist) 5 mgm 3...

394

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...

395

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 Pivrinta

2010-07-03T23:59:59.000Z

396

Electricity Transmission and Distribution Technologies ...  

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

397

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...

398

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

399

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

400

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

402

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

403

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; its 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

404

Visual-servoing optical microscopy  

DOE Patents (OSTI)

The present invention provides methods and devices for the knowledge-based discovery and optimization of differences between cell types. In particular, the present invention provides visual servoing optical microscopy, as well as analysis methods. The present invention provides means for the close monitoring of hundreds of individual, living cells over time; quantification of dynamic physiological responses in multiple channels; real-time digital image segmentation and analysis; intelligent, repetitive computer-applied cell stress and cell stimulation; and the ability to return to the same field of cells for long-term studies and observation. The present invention further provides means to optimize culture conditions for specific subpopulations of cells.

Callahan, Daniel E. (Martinez, CA); Parvin, Bahram (Mill Valley, CA)

2011-05-24T23:59:59.000Z

405

Visual-servoing optical microscopy  

DOE Patents (OSTI)

The present invention provides methods and devices for the knowledge-based discovery and optimization of differences between cell types. In particular, the present invention provides visual servoing optical microscopy, as well as analysis methods. The present invention provides means for the close monitoring of hundreds of individual, living cells over time: quantification of dynamic physiological responses in multiple channels; real-time digital image segmentation and analysis; intelligent, repetitive computer-applied cell stress and cell stimulation; and the ability to return to the same field of cells for long-term studies and observation. The present invention further provides means to optimize culture conditions for specific subpopulations of cells.

Callahan, Daniel E. (Martinez, CA); Parvin, Bahram (Hercules, CA)

2009-06-09T23:59:59.000Z

406

Microscopy Technique Could Help Computer Industry ...  

Science Conference Proceedings (OSTI)

Microscopy Technique Could Help Computer Industry Develop 3-D Components. From NIST Tech Beat: June 25, 2013. ...

2013-06-25T23:59:59.000Z

407

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

408

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

409

SOFCs and Other Topics  

Science Conference Proceedings (OSTI)

Oct 10, 2012 ... Convergent beam electron diffraction (CBED) and transmission electron microscopy (TEM) results have been compared to Java electron...

410

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...

411

FINAL PROJECT REPORT LOAD MODELING TRANSMISSION RESEARCH  

E-Print Network (OSTI)

stability analysisoftransmissionanddistributionVoltageRecovery,NERCTransmissionIssues SubcommitteAirConditionerResponsetoTransmissionFaults. ,IEEE

Lesieutre, Bernard

2013-01-01T23:59:59.000Z

412

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

413

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...

414

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

415

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...

416

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...

417

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

418

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

419

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

420

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

Synthesis and electronic structure of low-density monoliths of nanoporous nanocrystalline anatase TiO2  

Science Conference Proceedings (OSTI)

Monolithic nanocrystalline anatase titania aerogels are synthesized by the epoxide sol-gel method followed by thermal annealing at 550 C. These aerogels are formed by {approx}10-20 nm size anatase nanoparticles which are randomly oriented and interconnected into an open-cell solid network. Aerogel monoliths have an apparent density of {approx}6% and a surface area of {approx} 100 m{sup 2} g{sup -1}. High-resolution transmission electron microscopy and soft x-ray absorption near-edge structure spectroscopy reveal good crystallinity of the anatase nanoparticles forming the aerogel skeleton.

Kucheyev, S O; Baumann, T F; Wang, Y M; van Buuren, T; Satcher, J H

2004-08-13T23:59:59.000Z

422

Three-dimensional characterization of near-field transducers by electron tomography  

SciTech Connect

Transmission electron microscopy (TEM) was employed to study the structure of near-field transducers (NFT) for applications in heat-assisted magnetic recording (HAMR) heads. The overall shape of NFTs that had passed or failed an optical test was similar, as determined by scanning transmission electron microscopy tomography. However, the absence of a well-defined peg and the presence of a flat top on the 'FAIL' NFT disk induced poor thermal heat transfer from the NFT to the phase change medium and resulted in the optical test failure. The thermal heating around the NFT led to Ta diffusion from the adjacent tantala core and to the presence of Ta-rich particles in the alumina matrix in the plane of the NFT. - Highlights: Black-Right-Pointing-Pointer Very site specific TEM specimen prepared by dual-beam SEM/FIB system. Black-Right-Pointing-Pointer Near field transducer characterization by STEM tomography. Black-Right-Pointing-Pointer Elemental analysis in 2D by STEM-EDX.

Liu, Yuzi, E-mail: yuziliu@anl.gov [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Center for Nanoscale Materials, Argonne National Laboratory, Argonne IL, 60439 (United States); Schreiber, Daniel K. [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208 (United States); Petford-Long, Amanda K. [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Center for Nanoscale Materials, Argonne National Laboratory, Argonne IL, 60439 (United States); Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208 (United States); Gao, Kai-Zhong [Head and Media R and D, Seagate Technology, Bloomington, MN 55435 (United States)] [Head and Media R and D, Seagate Technology, Bloomington, MN 55435 (United States)

2012-10-15T23:59:59.000Z

423

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...

424

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

425

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...

426

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...

427

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...

428

Evolution of structural defects associated with electrical degradation in AlGaN/GaN high electron mobility transistors  

E-Print Network (OSTI)

We have investigated the surface morphology of electrically stressed AlGaN/GaN high electron mobility transistors using atomic force microscopy and scanning electron microscopy after removing the gate metallization by ...

Makaram, Prashanth

429

CNST Hosts Workshop on In Situ Measurements using ...  

Science Conference Proceedings (OSTI)

CNST Hosts Workshop on In Situ Measurements using Transmission Electron Microscopy. June 6, 2013. ...

2013-06-06T23:59:59.000Z

430

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 Pivrinta

2010-09-28T23:59:59.000Z

431

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; Pivrinta, Lassi

2010-01-01T23:59:59.000Z

432

Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research  

E-Print Network (OSTI)

et al. studied wood combustion and diesel combustionrange of deposited combustion products: creosote (wood smoke

Moffet, Ryan C.

2011-01-01T23:59:59.000Z

433

Nephila clavipes Spider Dragline Silk Microstructure Studied by Scanning Transmission X-ray Microscopy  

E-Print Network (OSTI)

). For a uniaxial system such as a fiber, the dichroic ratio image can then be used to calculate a map of the order structure or any periodicity along the fiber was observed at this spatial resolution. The surface of fresh by the spinning speed, STXM measurements clearly highlight microstructure differences. The slowpull fiber contains

Hitchcock, Adam P.

434

Soft x-ray scanning transmission x-ray microscopy (STXM) of actinide particles  

E-Print Network (OSTI)

the Np(V,VI) solid. A plutonium elemental map was obtainedspectromicroscopy, plutonium, neptunium *Correspondingwell as for metallic plutonium. [19,20] A useful comparison

Nilsson, Hans J.; Tyliszczak, Tolek; Wilson, Richard E.; Werme, Lars; Shuh, David K.

2005-01-01T23:59:59.000Z

435

Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research  

E-Print Network (OSTI)

Synchrotron Light Source, NSLS, (Brookhaven, USA) during thehave been at the ALS or NSLS. Several new instruments aremicroscopes at the ALS and NSLS are provided elsewhere. 18-

Moffet, Ryan C.

2011-01-01T23:59:59.000Z

436

Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research  

E-Print Network (OSTI)

in secondary organic aerosol. Environ. Sci. Technol. 41 ,particles from an urban aerosol. Environ. Sci. Technol. 26 ,carbonaceous atmospheric aerosols. Journal of Aerosol

Moffet, Ryan C.

2011-01-01T23:59:59.000Z

437

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

438

Maximizing fluorescence collection efficiency in multiphoton microscopy  

E-Print Network (OSTI)

-depth limit in two-photon microscopy," J. Opt. Soc. Am. A 23(12), 3139­3149 (2006). 9. D. Kobat, M. E. Durst

Levene, Michael J.

439

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

440

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

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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

442

Biological Imaging by Soft X-Ray Diffraction Microscopy  

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

Biological Imaging by Soft X-Ray Diffraction Microscopy Print Biological Imaging by Soft X-Ray Diffraction Microscopy Print Electron and x-ray microscopes are a valuable tool for both the life and materials sciences, but they are limited in their ability to image with nanometer-scale resolution in three dimensions nonperiodic objects that are several microns in size. To fill this gap, the technique of coherent x-ray diffraction imaging now under development takes advantage of the penetrating power of x rays while simultaneously removing the limitations imposed by lens-based optical systems. Researchers from Stony Brook University, in collaboration with scientists at the ALS and Cornell University, have taken a large step in this direction by using a lensless x-ray diffraction microscope to image a freeze-dried yeast cell to better than 30-nm resolution. Images were made at several angular orientations of the cell.

443

Exploring nanomagnetism with soft x-ray microscopy  

SciTech Connect

Magnetic soft X-ray microscopy images magnetism in nanoscale systems with a spatial resolution down to 15nm provided by state-of-the-art Fresnel zone plate optics. X-ray magnetic circular dichroism (X-MCD) is used as element-specific magnetic contrast mechanism similar to photoemission electron microscopy (PEEM), however, with volume sensitivity and the ability to record the images in varying applied magnetic fields which allows to study magnetization reversal processes at fundamental length scales. Utilizing a stroboscopic pump-probe scheme one can investigate fast spin dynamics with a time resolution down to 70 ps which gives access to precessional and relaxation phenomena as well as spin torque driven domain wall dynamics in nanoscale systems. Current developments in zone plate optics aim for a spatial resolution towards 10nm and at next generation X-ray sources a time resolution in the fsec regime can be envisioned.

Fischer, P.; Kim, D.-H.; Mesler, B.L.; Chao, W.; Sakdinawat,A.E.; Anderson, E.H.

2006-10-30T23:59:59.000Z

444

Biological Imaging by Soft X-Ray Diffraction Microscopy  

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

Biological Imaging by Soft X-Ray Diffraction Microscopy Print Biological Imaging by Soft X-Ray Diffraction Microscopy Print Electron and x-ray microscopes are a valuable tool for both the life and materials sciences, but they are limited in their ability to image with nanometer-scale resolution in three dimensions nonperiodic objects that are several microns in size. To fill this gap, the technique of coherent x-ray diffraction imaging now under development takes advantage of the penetrating power of x rays while simultaneously removing the limitations imposed by lens-based optical systems. Researchers from Stony Brook University, in collaboration with scientists at the ALS and Cornell University, have taken a large step in this direction by using a lensless x-ray diffraction microscope to image a freeze-dried yeast cell to better than 30-nm resolution. Images were made at several angular orientations of the cell.

445

Biological Imaging by Soft X-Ray Diffraction Microscopy  

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

Biological Imaging by Soft X-Ray Diffraction Microscopy Print Biological Imaging by Soft X-Ray Diffraction Microscopy Print Electron and x-ray microscopes are a valuable tool for both the life and materials sciences, but they are limited in their ability to image with nanometer-scale resolution in three dimensions nonperiodic objects that are several microns in size. To fill this gap, the technique of coherent x-ray diffraction imaging now under development takes advantage of the penetrating power of x rays while simultaneously removing the limitations imposed by lens-based optical systems. Researchers from Stony Brook University, in collaboration with scientists at the ALS and Cornell University, have taken a large step in this direction by using a lensless x-ray diffraction microscope to image a freeze-dried yeast cell to better than 30-nm resolution. Images were made at several angular orientations of the cell.

446

Biological Imaging by Soft X-Ray Diffraction Microscopy  

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

Biological Imaging by Soft X-Ray Diffraction Microscopy Print Biological Imaging by Soft X-Ray Diffraction Microscopy Print Electron and x-ray microscopes are a valuable tool for both the life and materials sciences, but they are limited in their ability to image with nanometer-scale resolution in three dimensions nonperiodic objects that are several microns in size. To fill this gap, the technique of coherent x-ray diffraction imaging now under development takes advantage of the penetrating power of x rays while simultaneously removing the limitations imposed by lens-based optical systems. Researchers from Stony Brook University, in collaboration with scientists at the ALS and Cornell University, have taken a large step in this direction by using a lensless x-ray diffraction microscope to image a freeze-dried yeast cell to better than 30-nm resolution. Images were made at several angular orientations of the cell.

447

Surface science analysis of GaAs photocathodes following sustained electron beam delivery  

DOE Green Energy (OSTI)

Degradation of the photocathode materials employed in photoinjectors represents a challenge for sustained operation of nuclear physics accelerators and high power Free Electron Lasers (FEL). Photocathode quantum efficiency (QE) degradation is due to residual gasses in the electron source vacuum system being ionized and accelerated back to the photocathode. These investigations are a first attempt to characterize the nature of the photocathode degradation, and employ multiple surface and bulk analysis techniques to investigate damage mechanisms including sputtering of the Cs-oxidant surface monolayer, other surface chemistry effects, and ion implantation. Surface and bulk analysis studies were conducted on two GaAs photocathodes, which were removed from the JLab FEL DC photoemission gun after delivering electron beam, and two control samples. The analysis techniques include Helium Ion Microscopy (HIM), Rutherford Backscattering Spectrometry (RBS), Atomic Force Microscopy (AFM) and Secondary Ion Mass Spectrometry (SIMS). In addition, two high-polarization strained superlattice GaAs photocathode samples, one removed from the Continuous Electron Beam Accelerator Facility (CEBAF) photoinjector and one unused, were also analyzed using Transmission Electron Microscopy (TEM) and SIMS. It was found that heat cleaning the FEL GaAs wafer introduces surface roughness, which seems to be reduced by prolonged use. The bulk GaAs samples retained a fairly well organized crystalline structure after delivering beam but shows evidence of Cs depletion on the surface. Within the precision of the SIMS and RBS measurements the data showed no indication of hydrogen implantation or lattice damage from ion back bombardment in the bulk GaAs wafers. In contrast, SIMS and TEM measurements of the strained superlattice photocathode show clear crystal damage in the wafer from ion back bombardment.

Carlos Hernandez-Garcia, Fay Hannon, Marcy Stutzman, V. Shutthanandan, Z. Zhu, M. Nandasri, S. V. Kuchibhatla, S. Thevuthasan, W. P. Hess

2012-06-01T23:59:59.000Z

448

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

449

PROPOSAL FOR CONTINGENT TRANSMISSION PLANS  

E-Print Network (OSTI)

How should the WECCs 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

450

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

451

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

452

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 Colleges 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

453

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

454

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...

455

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

456

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

457

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

458

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

459

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

460

In-situ Microscopy and Analysis  

Science Conference Proceedings (OSTI)

In this presentation, I will present our recent in-situ deformation transmission .... and propagation of crack lines upon the application of mechanical stresses.

Note: This page contains sample records for the topic "transmission electron microscopy" 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

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...

462

In-situ spectro-microscopy on organic films: Mn-Phthalocyanine on Ag(100)  

SciTech Connect

Metal phthalocyanines are attracting significant attention, owing to their potential for applications in chemical sensors, solar cells and organic magnets. As the electronic properties of molecular films are determined by their crystallinity and molecular packing, the optimization of film quality is important for improving the performance of organic devices. Here, we present the results of in situ low-energy electron microscopy / photoemission electron microscopy (LEEM/PEEM) studies of incorporation-limited growth [1] of manganese-phthalocyanine (MnPc) on Ag(100) surfaces. MnPc thin films were grown on both, bulk Ag(100) surface and thin Ag(100)/Fe(100) films, where substrate spin-polarized electronic states can be modified through tuning the thickness of the Ag film [2]. We also discuss the electronic structure and magnetic ordering in MnPc thin films, investigated by angle- and spin-resolved photoemission spectroscopy.

Al-Mahboob A.; Vescovo, E.; Sadowski, J.T.

2013-08-18T23:59:59.000Z

463

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

464

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

465

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

466

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

467

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

468

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...

469

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

470

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

471

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

472

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

473

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

474

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

475

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 ks power flownetwork branches (transmission lines), it is possible to

Hedman, Kory Walter

2010-01-01T23:59:59.000Z

476

Design of Flexure-based Precision Transmission Mechanisms using Screw Theory  

SciTech Connect

This paper enables the synthesis of flexure-based transmission mechanisms that possess multiple decoupled inputs and outputs of any type (e.g. rotations, translations, and/or screw motions), which are linked by designer-specified transmission ratios. A comprehensive library of geometric shapes is utilized from which every feasible concept that possesses the desired transmission characteristics may be rapidly conceptualized and compared before an optimal concept is selected. These geometric shapes represent the rigorous mathematics of screw theory and uniquely link a body's desired motions to the flexible constraints that enable those motions. This paper's impact is most significant to the design of nano-positioners, microscopy stages, optical mounts, and sensors. A flexure-based microscopy stage was designed, fabricated, and tested to demonstrate the utility of the theory.

Hopkins, J B; Panas, R M

2011-02-07T23:59:59.000Z

477

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...

478

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...

479

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;

480

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...

Note: This page contains sample records for the topic "transmission electron microscopy" 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.


481

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...

482

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...

483

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...

484

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...