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


1

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.

2

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,...

3

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

4

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 ...

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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.

13

Scanning Confocal Electron Microscope (SCEM)  

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

14

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...

15

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

16

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

17

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

18

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

19

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

20

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

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

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...

22

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

23

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...

24

Analytical Electron Microscope  

Science Conference Proceedings (OSTI)

... a conventional parallel electron energy-loss spectrometer (EELS) to record spectra of the energy losses experienced by the beam electrons as they ...

2012-10-01T23:59:59.000Z

25

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

26

Overview of Electron Microscope Interference  

Science Conference Proceedings (OSTI)

Power frequency magnetic fields can interfere with proper operation of electronic imaging systems. Electron microscopes are susceptible to deflection of their electron beam by an external magnetic field. This unwanted deflection can cause blurring of the image. MRI equipment is susceptible to induced voltage in the sensing coil caused by changing magnetic fields. In either case the result is degradation of the image. Magnetic field strengths that impact the images are on the same order of magnitude as th...

2010-05-28T23:59:59.000Z

27

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

28

Nanomaterials Analysis using a Scanning Electron Microscope ...  

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

Nanomaterials Analysis using a Scanning Electron Microscope Technology available for licensing: Steradian X-ray detection system increases the detection capability of SEMs during...

29

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

30

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

31

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

32

A Networked Scanning Electron Microscope  

Science Conference Proceedings (OSTI)

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

33

Scanning Electron Microscope 1: Zeiss Ultra-60 FESEM  

Science Conference Proceedings (OSTI)

Scanning Electron Microscope 1: Zeiss Ultra-60 FESEM. ... Secondary and backscattered electron detectors; Images structures down to 10 nm in size; ...

2013-05-30T23:59:59.000Z

34

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 ...

35

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

36

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

37

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

38

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...

39

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 ...

40

Simulation and characterization of a miniaturized Scanning Electron Microscope  

Science Conference Proceedings (OSTI)

A miniaturized Scanning Electron Microscope (mini-SEM) for in-situ lunar investigations is being developed at NASA Marshall Space Flight Center with colleagues from the University of Alabama in Huntsville (UAH), Advanced Research Systems (ARS), and the ...

Jessica. A. Gaskin; Gregory A. Jerman; Stephanie Medley; Don Gregory; Terry O. Abbott; Allen R. Sampson

2011-03-01T23:59:59.000Z

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

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,

42

Quantitative Nanostructure Characterization Using Atomic Pair Distribution Functions Obtained From Laboratory Electron Microscopes  

Science Conference Proceedings (OSTI)

Quantitatively reliable atomic pair distribution functions (PDFs) have been obtained from nanomaterials in a straightforward way from a standard laboratory transmission electron microscope (TEM). The approach looks very promising for making electron derived PDFs (ePDFs) a routine step in the characterization of nanomaterials because of the ubiquity of such TEMs in chemistry and materials laboratories. No special attachments such as energy filters were required on the microscope. The methodology for obtaining the ePDFs is described as well as some opportunities and limitations of the method.

Abeykoon M.; Billinge S.; Malliakas, C.D.; Juhas, P.; Bozin, E.S.; Kanatzidis, M.G.

2012-05-01T23:59:59.000Z

43

Simultaneous specimen and stage cleaning device for analytical electron microscope  

DOE Patents (OSTI)

An improved method and apparatus are provided for cleaning both a specimen stage, a specimen and an interior of an analytical electron microscope (AEM). The apparatus for cleaning a specimen stage and specimen comprising a plasma chamber for containing a gas plasma and an air lock coupled to the plasma chamber for permitting passage of the specimen stage and specimen into the plasma chamber and maintaining an airtight chamber. The specimen stage and specimen are subjected to a reactive plasma gas that is either DC or RF excited. The apparatus can be mounted on the analytical electron microscope (AEM) for cleaning the interior of the microscope.

Zaluzec, Nestor J. (Bolingbrook, IL)

1996-01-01T23:59:59.000Z

44

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...

45

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

46

Response function and optimum configuration of semiconductor backscattered-electron detectors for scanning electron microscopes  

Science Conference Proceedings (OSTI)

A new highly efficient design for semiconductor detectors of intermediate-energy electrons (1-50 keV) for application in scanning electron microscopes is proposed. Calculations of the response function of advanced detectors and control experiments show that the efficiency of the developed devices increases on average twofold, which is a significant positive factor in the operation of modern electron microscopes in the mode of low currents and at low primary electron energies.

Rau, E. I. [Moscow State University (Russian Federation); Orlikovskiy, N. A. [Russian Academy of Sciences, Physical Technological Institute (Russian Federation); Ivanova, E. S. [Moscow State University (Russian Federation)

2012-06-15T23:59:59.000Z

47

Measurement of Semiconductor Surface Potential using the Scanning Electron Microscope  

SciTech Connect

We calibrate the secondary electron signal from a standard scanning electron microscope to voltage, yielding an image of the surface or near-surface potential. Data on both atomically abrupt heterojunction GaInP/GaAs and diffused homojunction Si solar cell devices clearly show the expected variation in potential with position and applied bias, giving depletion widths and locating metallurgical junctions to an accuracy better than 10 nm. In some images, distortion near the p-n junction is observed, seemingly consistent with the effects of lateral electric fields (patch fields). Reducing the tube bias removes this distortion. This approach results in rapid and straightforward collection of near-surface potential data using a standard scanning electron microscope.

Heath, J. T.; Jiang, C. S.; Al-Jassim, M. M.

2012-02-15T23:59:59.000Z

48

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

49

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

50

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

51

In situ laser processing in a scanning electron microscope  

Science Conference Proceedings (OSTI)

Laser delivery probes using multimode fiber optic delivery and bulk focusing optics have been constructed and used for performing materials processing experiments within scanning electron microscope/focused ion beam instruments. Controlling the current driving a 915-nm semiconductor diode laser module enables continuous or pulsed operation down to sub-microsecond durations, and with spot sizes on the order of 50 {micro}m diameter, achieving irradiances at a sample surface exceeding 1 MW/cm{sup 2}. Localized laser heating has been used to demonstrate laser chemical vapor deposition of Pt, surface melting of silicon, enhanced purity, and resistivity via laser annealing of Au deposits formed by electron beam induced deposition, and in situ secondary electron imaging of laser induced dewetting of Au metal films on SiO{sub x}.

Roberts, Nicholas [University of Tennessee, Knoxville (UTK); Fowlkes, Jason Davidson [ORNL; Rack, Prof. Philip [University of Tennessee, Knoxville (UTK); Moore, Tom [OmniProbe, Inc.; Magel, Greg [OmniProbe, Inc.; Hartfield, Cheryl [OmniProbe, Inc.

2012-01-01T23:59:59.000Z

52

In situ laser processing in a scanning electron microscope  

SciTech Connect

Laser delivery probes using multimode fiber optic delivery and bulk focusing optics have been constructed and used for performing materials processing experiments within scanning electron microscope/focused ion beam instruments. Controlling the current driving a 915-nm semiconductor diode laser module enables continuous or pulsed operation down to sub-microsecond durations, and with spot sizes on the order of 50 {mu}m diameter, achieving irradiances at a sample surface exceeding 1 MW/cm{sup 2}. Localized laser heating has been used to demonstrate laser chemical vapor deposition of Pt, surface melting of silicon, enhanced purity, and resistivity via laser annealing of Au deposits formed by electron beam induced deposition, and in situ secondary electron imaging of laser induced dewetting of Au metal films on SiO{sub x}.

Roberts, Nicholas A.; Magel, Gregory A.; Hartfield, Cheryl D.; Moore, Thomas M.; Fowlkes, Jason D.; Rack, Philip D. [Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States) and Omniprobe, Inc., an Oxford Instruments Company, 10410 Miller Rd., Dallas, Texas 75238 (United States); Omniprobe, Inc., an Oxford Instruments Company, 10410 Miller Rd., Dallas, Texas 75238 (United States); Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States) and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2012-07-15T23:59:59.000Z

53

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

54

Characterization of electron microscopes with binary pseudo-random multilayer test samples  

SciTech Connect

Verification of the reliability of metrology data from high quality x-ray optics requires that adequate methods for test and calibration of the instruments be developed. For such verification for optical surface profilometers in the spatial frequency domain, a modulation transfer function (MTF) calibration method based on binary pseudo-random (BPR) gratings and arrays has been suggested [Proc. SPIE 7077-7 (2007), Opt. Eng. 47(7), 073602-1-5 (2008)} and proven to be an effective calibration method for a number of interferometric microscopes, a phase shifting Fizeau interferometer, and a scatterometer [Nucl. Instr. and Meth. A 616, 172-82 (2010)]. Here we describe the details of development of binary pseudo-random multilayer (BPRML) test samples suitable for characterization of scanning (SEM) and transmission (TEM) electron microscopes. We discuss the results of TEM measurements with the BPRML test samples fabricated from a WiSi2/Si multilayer coating with pseudo randomly distributed layers. In particular, we demonstrate that significant information about the metrological reliability of the TEM measurements can be extracted even when the fundamental frequency of the BPRML sample is smaller than the Nyquist frequency of the measurements. The measurements demonstrate a number of problems related to the interpretation of the SEM and TEM data. Note that similar BPRML test samples can be used to characterize x-ray microscopes. Corresponding work with x-ray microscopes is in progress.

Yashchuk, Valeriy V; Conley, Raymond; Anderson, Erik H; Barber, Samuel K; Bouet, Nathalie; McKinney, Wayne R; Takacs, Peter Z; Voronov, Dmitriy L

2010-09-17T23:59:59.000Z

55

Miniature self-contained vacuum compatible electronic imaging microscope  

DOE Patents (OSTI)

A vacuum compatible CCD-based microscopic camera with an integrated illuminator. The camera can provide video or still feed from the microscope contained within a vacuum chamber. Activation of an optional integral illuminator can provide light to illuminate the microscope subject. The microscope camera comprises a housing with a objective port, modified objective, beam-splitter, CCD camera, and LED illuminator.

Naulleau, Patrick P. (Oakland, CA); Batson, Phillip J. (Alameda, CA); Denham, Paul E. (Crockett, CA); Jones, Michael S. (San Francisco, CA)

2001-01-01T23:59:59.000Z

56

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

Science Conference Proceedings (OSTI)

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

57

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 1Ã… 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

58

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.

59

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 ...

60

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.

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

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

62

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.

63

Progress on PEEM3 - An Aberration Corrected X-Ray Photoemission Electron Microscope at the ALS  

E-Print Network (OSTI)

Electron Microscope at the ALS A.A.MacDowell 1 , J.Feng 1 ,the Advanced Light Source (ALS). An electron mirror combinedat the Advanced Light Source (ALS). This limit is due to the

2006-01-01T23:59:59.000Z

64

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

65

Research and Design of a Sample Heater for Beam Line 6-2c Transmission X-ray Microscope  

Science Conference Proceedings (OSTI)

There exists a need for environmental control of samples to be imaged by the Transmission X-Ray Microscope (TXM) at the SSRLs Beam Line 6-2c. In order to observe heat-driven chemical or morphological changes that normally occur in situ, microscopes require an additional component that effectively heats a given sample without heating any of the microscope elements. The confinement of the heat and other concerns about the heaters integrity limit which type of heater is appropriate for the TXM. The bulk of this research project entails researching different heating methods used previously in microscopes, but also in other industrial applications, with the goal of determining the best-fitting method, and finally in designing a preliminary sample heater.

Policht, Veronica; /Loyola U., Chicago /SLAC

2012-08-27T23:59:59.000Z

66

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...

67

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

68

Telecontrol of Ultra-High Voltage Electron Microscope over Global IPv6 Network  

Science Conference Proceedings (OSTI)

Osaka University has an Ultra-High VoltageElectron Microscope (UHVEM) which can provide highquality specimen images for worldwide researchers. Forusability improvements, we have worked on thetelecontrol of the UHVEM. In this paper, we would liketo introduce ...

Toyokazu Akiyama; Shinji Shimojo; Shojiro Nishio; Yoshinori Kitatsuji; Steven Peltier; Thomas Hutton; Fang-Pang Lin

2003-01-01T23:59:59.000Z

69

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

70

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

71

Note: A scanning electron microscope sample holder for bidirectional characterization of atomic force microscope probe tips  

Science Conference Proceedings (OSTI)

A novel sample holder that enables atomic force microscopy (AFM) tips to be mounted inside a scanning electron microscopy (SEM) for the purpose of characterizing the AFM tips is described. The holder provides quick and easy handling of tips by using a spring clip to hold them in place. The holder can accommodate two tips simultaneously in two perpendicular orientations, allowing both top and side view imaging of the tips by the SEM.

Eisenstein, Alon; Goh, M. Cynthia [Department of Chemistry and Institute for Optical Sciences, University of Toronto, 80 St. George Street, Toronto M5S 3H6 (Canada)

2012-03-15T23:59:59.000Z

72

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

73

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

74

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...

75

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...

76

Thin-film thickness measurement using x-ray peak ratioing in the scanning electron microscope  

Science Conference Proceedings (OSTI)

The procedure used to measure laser target film thickness using a scanning electron microscope is summarized. This method is generally applicable to any coating on any substrate as long as the electron energy is sufficient to penetrate the coating and the substrate produces an x-ray signal which can pass back through the coating and be detected. (MOW)

Elliott, N.E.; Anderson, W.E.; Archuleta, T.A.; Stupin, D.M.

1981-01-01T23:59:59.000Z

77

Power Electronics-Based Transmission Controllers Reference Book  

Science Conference Proceedings (OSTI)

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

2005-12-02T23:59:59.000Z

78

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

79

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

80

A new Scanning Transmission X-ray Microscope at the ALS for operation up to 2500eV  

Science Conference Proceedings (OSTI)

We report on the design and construction of a higher energy Scanning Transmission X-ray Microscope on a new bend magnet beam line at the Advanced Light Source. Previously we have operated such an instrument on a bend magnet for C, N and O 1s NEXAFS spectroscopy. The new instrument will have similar performance at higher energies up to and including the S 1s edge at 2472eV. A new microscope configuration is planned. A more open geometry will allow a fluorescence detector to count emitted photons from the front surface of the sample. There will be a capability for zone plate scanning in addition to the more conventional sample scanning mode. This will add the capability for imaging a massive sample at high resolution over a limited field of view, so that heavy reaction cells may be used to study processes in-situ, exploiting the longer photon attenuation length and the longer zone plate working distances available at higher photon energy. The energy range will extend down to include the C1s edge at 300eV, to allow high energy NEXAFS microscopic studies to correlate with the imaging of organics in the same sample region of interest.

Kilcoyne, David; McKean, Pat; Tyliszczak, Tolek; Warwick, Tony [Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California (United States); Ade, Harald [Department of Physics, North Carolina State University, Raleigh, North Carolina (United States); Attwood, David [Center for Xray Optics, Lawrence Berkeley Laboratory, Berkeley, California (United States); Hitchcock, Adam [Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario (Canada); Mitchell, Gary [DOW Chemical Company, Midland, Michigan (United States); Monteiro, Paulo [Dept. Civil and Environmental Engineering, University of California, Berkeley, California (United States)

2010-06-23T23:59:59.000Z

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

A new Scanning Transmission X-ray Microscope at the ALS for operation up to 2500eV  

Science Conference Proceedings (OSTI)

We report on the design and construction of a higher energy Scanning Transmission X-ray Microscope on a new bend magnet beam line at the Advanced Light Source. Previously we have operated such an instrument on a bend magnet for C, N and O 1s NEXAFS spectroscopy. The new instrument will have similar performance at higher energies up to and including the S 1s edge at 2472eV. A new microscope configuration is planned. A more open geometry will allow a fluorescence detector to count emitted photons from the front surface of the sample. There will be a capability for zone plate scanning in addition to the more conventional sample scanning mode. This will add the capability for imaging a massive sample at high resolution over a limited field of view, so that heavy reaction cells may be used to study processes in-situ, exploiting the longer photon attenuation length and the longer zone plate working distances available at higher photon energy. The energy range will extend down to include the C1s edge at 300eV, to allow high energy NEXAFS microscopic studies to correlate with the imaging of organics in the same sample region of interest.

Kilcoyne, David; Ade, Harald; Attwood, David; Hitchcock, Adam; McKean, Pat; Mitchell, Gary; Monteiro, Paulo; Tyliszczak, Tolek; Warwick, Tony

2010-01-31T23:59:59.000Z

82

microscopes_2001  

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

5 . His work was a giant 6 6 6 6 6 for science. Today, microscopes are much stronger. An electron microscope can make tiny organisms look 200,000 times 7 7 7 7 7 size. A few...

83

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

84

A Remote Operation System for the 3MV Electron Microscope with a Both-Direction Conversation Capability  

Science Conference Proceedings (OSTI)

The 3MV ultrahigh voltage electron microscope (UHVEM) at the Research Center for UHVEM, Osaka University, has been widely used for microscopy of thick specimens, taking advantage of high penetration power of incident electrons. Recent developments in ...

Hirotaro Mori; Kiyokazu Yoshida; Shinji Shimojo; Hiroki Nogawa; Toyokazu Akiyama; Heishichiro Takahashi; Tamaki Shibayama

2004-01-01T23:59:59.000Z

85

Analysis with electron microscope of multielement samples using pure element standards  

DOE Patents (OSTI)

A method and modified analytical electron microscope for determining the concentration of elements in a multielement sample by exposing samples with differing thicknesses for each element to a beam of electrons, simultaneously measuring the electron dosage and x-ray intensities for each sample of element to determine a "K.sub.AB " value to be used in the equation ##EQU1## where I is intensity and C is concentration for elements A and B, and exposing the multielement sample to determine the concentrations of the elements in the sample.

King, Wayne E. (Western Springs, IL)

1987-01-01T23:59:59.000Z

86

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

87

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

88

Are Electron Tweezers Possible? Apparently So.  

Science Conference Proceedings (OSTI)

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

2012-10-02T23:59:59.000Z

89

The Scanning Electron Microscope As An Accelerator For The Undergraduate Advanced Physics Laboratory  

Science Conference Proceedings (OSTI)

Few universities or colleges have an accelerator for use with advanced physics laboratories, but many of these institutions have a scanning electron microscope (SEM) on site, often in the biology department. As an accelerator for the undergraduate, advanced physics laboratory, the SEM is an excellent substitute for an ion accelerator. Although there are no nuclear physics experiments that can be performed with a typical 30 kV SEM, there is an opportunity for experimental work on accelerator physics, atomic physics, electron-solid interactions, and the basics of modern e-beam lithography.

Peterson, Randolph S. [Department of Physics and Astronomy, University of the South, 735 University Avenue, Sewanee TN 37383 (United States); Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 50 Vassar Street, Cambridge MA 01239 (United States); Berggren, Karl K.; Mondol, Mark [Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 50 Vassar Street, Cambridge MA 01239 (United States)

2011-06-01T23:59:59.000Z

90

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

91

Analysis with electron microscope of multielement samples using pure element standards  

DOE Patents (OSTI)

This disclosure describes a method and modified analytical electron microscope for determining the concentration of elements in a multielement sample by exposing samples with differing thicknesses for each element to a beam of electrons. Simultaneously the electron dosage and x-ray intensities are measured for each sample of element to determine a ''K/sub AB/'' value to be used in the equation (I/sub A/I/sub B/) = K/sub AB/ (C/sub A//C/sub B/), where I is intensity and C is concentration for elements A and B. The multielement sample is exposed to determine the concentrations of the elements in the sample.

King, W.E.

1986-01-06T23:59:59.000Z

92

In situ nanomechanical testing in focused ion beam and scanning electron microscopes  

Science Conference Proceedings (OSTI)

The recent interest in size-dependent deformation of micro- and nanoscale materials has paralleled both technological miniaturization and advancements in imaging and small-scale mechanical testing methods. Here we describe a quantitative in situ nanomechanical testing approach adapted to a dual-beam focused ion beam and scanning electron microscope. A transducer based on a three-plate capacitor system is used for high-fidelity force and displacement measurements. Specimen manipulation, transfer, and alignment are performed using a manipulator, independently controlled positioners, and the focused ion beam. Gripping of specimens is achieved using electron-beam assisted Pt-organic deposition. Local strain measurements are obtained using digital image correlation of electron images taken during testing. Examples showing results for tensile testing of single-crystalline metallic nanowires and compression of nanoporous Au pillars will be presented in the context of size effects on mechanical behavior and highlight some of the challenges of conducting nanomechanical testing in vacuum environments.

Gianola, D. S. [Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe (Germany); Sedlmayr, A.; Moenig, R.; Kraft, O. [Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe (Germany); Volkert, C. A. [Institute for Materials Physics, Georg-August University of Goettingen, Goettingen (Germany); Major, R. C.; Cyrankowski, E.; Asif, S. A. S.; Warren, O. L. [Hysitron, Inc., Minneapolis, Minnesota 55344 (United States)

2011-06-15T23:59:59.000Z

93

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

94

Magnetic lens apparatus for a low-voltage high-resolution electron microscope  

DOE Patents (OSTI)

A lens apparatus in which a beam of charged particles of low accelerating voltage is brought to a focus by a magnetic field, the lens being situated behind the target position. The lens comprises an electrically-conducting coil arranged around the axis of the beam and a magnetic pole piece extending along the axis of the beam at least within the space surrounded by the coil. The lens apparatus comprises the sole focusing lens for high-resolution imaging in a low-voltage scanning electron microscope.

Crewe, Albert V. (Palos Park, IL)

1996-01-01T23:59:59.000Z

95

Note: Direct measurement of the point-to-point resolution for microns-thick specimens in the ultrahigh-voltage electron microscope  

SciTech Connect

We report on a direct measurement method and results of the point-to-point resolution for microns-thick amorphous specimens in the ultrahigh-voltage electron microscope (ultra-HVEM). We first obtain the ultra-HVEM images of nanometer gold particles with different sizes on the top surfaces of the thick epoxy-resin specimens. Based on the Rayleigh criterion, the point-to-point resolution is then determined as the minimum distance between centers of two resolvable tangent gold particles. Some values of resolution are accordingly acquired for the specimens with different thicknesses at the accelerating voltage of 2 MV, for example, 18.5 nm and 28.4 nm for the 5 {mu}m and 8 {mu}m thick epoxy-resin specimens, respectively. The presented method and results provide a reliable and useful approach to quantifying and comparing the achievable spatial resolution for the thick specimens imaged in the mode of transmission electron including the scanning transmission electron microscope.

Wang Fang; Cao Meng; Zhang Haibo [Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049 (China); Nishi, Ryuji; Takaoka, Akio [Research Center for Ultrahigh-Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan)

2011-06-15T23:59:59.000Z

96

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

97

A Scanning Electron Microscope Facility for Characterization of Tritium Containing Materials  

SciTech Connect

A scanning electron microscope (SEM) facility for the examination of tritium-containing materials is operational at Mound Laboratory. The SEM is installed with the sample chamber incorporated as an integral part of an inert gas glovebox facility to enable easy handling of radioactive and pyrophoric materials. A standard SEM (ERTEC Model B-1) was modified to meet dimensional, operational, and safety-related requirements. A glovebox was designed and fabricated which permitted access with the gloves to all parts of the SEM sample chamber to facilitate detector and accessory replacement and repairs. A separate console combining the electron optical column and specimen chamber was interfaced to the glovebox by a custom-made, neoprene bellows so that the vibrations normally associated with the blowers and pumps were damped. Photomicrographs of tritiated pyrophoric materials show the usefulness of this facility. Some of the difficulties involved in the investigation of these materials are also discussed.

Downs, G. L.; Tucker, P. A.

1975-10-01T23:59:59.000Z

98

Graphical template software for accurate micromanipulation in a scanning electron microscope  

SciTech Connect

Micromanipulation techniques in a scanning electron microscope (SEM) have been utilized for assembling micrometer-sized structures. The precision of the assembled microstructures has been limited by the poor accuracy of the SEM image. We have developed a software to assist the operator in the accurate assembly of microstructures in a SEM, in which computer-generated outlines of the target structure [graphical templates (GTs)] are superimposed on the monitor. The displayed GTs are distorted on the basis of the image properties of the SEM evaluated in advance. As a consequence, the operator can construct microstructures with a high precision only by maneuvering the manipulator so that the outline of each object perfectly overlaps the GT without any alteration of the electron optics or circuits for improving the image accuracy.

Kasaya, Takeshi [Nanotechnology Innovation Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Miyazaki, Hideki T. [Quantum Dot Research Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)

2009-01-15T23:59:59.000Z

99

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

100

Correction of distance-dependent blurring in projection data for fully three-dimensional electron microscopic reconstruction  

Science Conference Proceedings (OSTI)

We propose a method of correction for distance-dependent blurring, which is one of the limiting factors to achieving higher resolution in 3D reconstructions of biological specimens from 2D projections obtained by an electron microscope. Our proposed ... Keywords: contrast transfer function, distance-dependent blurring, electron microscopy, stationary phase

Joanna Klukowska; Gabor T. Herman; Ivan G. Kazantsev

2010-04-01T23:59:59.000Z

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

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

102

Electron microscopic evaluation and fission product identification of irradiated TRISO coated particles from the AGR-1 experiment: A preliminary Study  

Science Conference Proceedings (OSTI)

ABSTRACT Post-irradiation examination of coated particle fuel from the AGR-1 experiment is in progress at Idaho National Laboratory and Oak Ridge National Laboratory. In this presentation a brief summary of results from characterization of microstructures in the coating layers of selected irradiated fuel particles with burnup of 11.3% and 19.3% FIMA will be given. The main objective of the characterization were to study irradiation effects, fuel kernel porosity, layer debonding, layer degradation or corrosion, fission-product precipitation, grain sizes, and transport of fission products from the kernels across the TRISO layers. Characterization techniques such as scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, and wavelength dispersive spectroscopy were used. A new approach to microscopic quantification of fission-product precipitates is also briefly demonstrated. The characterization emphasized fission-product precipitates in the SiC-IPyC interface, SiC layer and the fuel-buffer interlayer, and provided significant new insights into mechanisms of fission-product transport. Although Pd-rich precipitates were identified at the SiC-IPyC interlayer, no significant SiC-layer thinning was observed for the particles investigated. Characterization of these precipitates highlighted the difficulty of measuring low concentration Ag in precipitates with significantly higher concentrations of contain Pd and U. Different approaches to resolving this problem are discussed. Possible microstructural differences between particles with high and low releases of Ag particles are also briefly discussed, and an initial hypothesis is provided to explain fission-product precipitate compositions and locations. No SiC phase transformations or debonding of the SiC-IPyC interlayer as a result of irradiation were observed. Lessons learned from the post-irradiation examination are described and future actions are recommended.

I J van Rooyen; D E Janney; B D Miller; J L Riesterer; P A Demkowicz

2012-10-01T23:59:59.000Z

103

A new Scanning Transmission X-ray Microscope at the ALS for operation up to 2500eV  

E-Print Network (OSTI)

X-ray Microscope at the ALS for operation up to 2500eV DavidLight Source [2]. In the new ALS facility the energy rangein the two existing STXMs at ALS and a flexible platform for

Kilcoyne, David

2010-01-01T23:59:59.000Z

104

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 ...

105

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

106

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

107

Development of a nanostructure thermal property measurement platform compatible with a transmission electron microscope  

E-Print Network (OSTI)

Measurements of the electrical and thermal transport properties of one-dimensional nanostructures (e.g., nanotubes and nanowires) typically are obtained without detailed knowledge of the specimen's atomicscale structure ...

Harris, C. Thomas (Charles Thomas)

2010-01-01T23:59:59.000Z

108

In-Situ Transmission Electron Microscopic Study of the E-Beam ...  

Science Conference Proceedings (OSTI)

Under e-beam irradiation, the structural ordering parallel to the basal plane gradually deteriorated because of the appearance of dislocation loops, bending and ...

109

The In situ Compression of Annealed Molybdenum Nanopillars in the Transmission Electron Microscope  

E-Print Network (OSTI)

the auspices of the US Department of Energy by Lawrencesupported by the US Department of Energy under Contract #DE-an Energy Frontier Research Center funded by the U.S.

Lowry, Matthew

2011-01-01T23:59:59.000Z

110

The In situ Compression of Annealed Molybdenum Nanopillars in the Transmission Electron Microscope  

E-Print Network (OSTI)

10.1021/nl201890s (2011). Herring, C. & Galt, J. K. Elasticthe 1950?s by Galt and Herring 14 , Brenner 15 , and others,

Lowry, Matthew

2011-01-01T23:59:59.000Z

111

Robust Alignment of Transmission Electron Microscope Tilt Series Sami S. Brandt  

E-Print Network (OSTI)

Processing Laboratory, Dept. of Electrcal and Information Engineering, P.O. Box 4500, FI-90014 University

Brandt, Sami

112

Transmission-mode imaging in the environmental scanning electron microscope (ESEM)  

E-Print Network (OSTI)

and negate any charging artefacts that would otherwise be caused. The first published use of the ESEM was on wool fibres [6], when Dani- latos also demonstrated the ability of the instrument to work at atmospheric pressures. Due to various technical...

Staniewicz, Lech Thomas Leif

2012-02-07T23:59:59.000Z

113

The In situ Compression of Annealed Molybdenum Nanopillars in the Transmission Electron Microscope  

E-Print Network (OSTI)

funded by the U.S. Department of Energy, Office of Science,Office of Basic Energy Sciences. The author also

Lowry, Matthew

2011-01-01T23:59:59.000Z

114

Microscopic linear liquid streams in vacuum: Injection of solvated biological samples into X-ray free electron lasers  

SciTech Connect

Microscopic linear liquid free-streams offer a means of gently delivering biological samples into a probe beam in vacuum while maintaining the sample species in a fully solvated state. By employing gas dynamic forces to form the microscopic liquid stream (as opposed to a conventional solid-walled convergent nozzle), liquid free-streams down to 300 nm diameter have been generated. Such 'Gas Dynamic Virtual Nozzles' (GDVN) are ideally suited to injecting complex biological species into an X-ray Free Electron Laser (XFEL) to determine the structure of the biological species via Serial Femtosecond Crystallography (SFX). GDVN injector technology developed for this purpose is described.

Doak, R. B.; DePonte, D. P.; Nelson, G.; Camacho-Alanis, F.; Ros, A.; Spence, J. C. H.; Weierstall, U. [Arizona State University, Tempe, AZ 85287-1504 (United States); Centre for Free-Electron Laser Science, DESY, D-22607 Hamburg (Germany); Arizona State University, Tempe, AZ 85287-1504 (United States)

2012-11-27T23:59:59.000Z

115

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

116

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...

117

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

118

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

119

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

120

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

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

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

122

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

123

L1, Formation of Structural Defects in AlGaN/GaN High Electron ...  

Science Conference Proceedings (OSTI)

Transmission electron microscope (TEM) cross sectional image has shown that electrical degradation is closely related to structural damage in the GaN cap and  ...

124

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

125

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

126

A microscopic model of electronic field noise heating in ion traps  

E-Print Network (OSTI)

Motional heating of ions in micro-fabricated traps is a challenge hindering experimental realization of large-scale quantum processing devices. Recently a series of measurements of the heating rates in surface-electrode ion traps characterized their frequency, distance, and temperature dependencies, but our understanding of the microscopic origin of this noise is still vague. In this work we develop a theoretical model for the electric field noise which is associated with a random distribution of adsorbed atoms on the trap electrode surface. By using first principle calculations of the fluctuating dipole moments of the adsorbed atoms we evaluate the distance, frequency and temperature dependence of the resulting electric field fluctuation spectrum.Our theory calculates the noise spectrum beyond the standard scenario of two-level fluctuators, by incorporating all the relevant vibrational states. The $1/f$ noise is shown to commence at roughly the frequency of the fundamental phonon transition rate and the $d^{...

Safavi-Naini, A; Weck, P; Sadeghpour, H R

2011-01-01T23:59:59.000Z

127

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

128

A microscopic model of electronic field noise heating in ion traps  

E-Print Network (OSTI)

Motional heating of ions in micro-fabricated traps is a challenge hindering experimental realization of large-scale quantum processing devices. Recently a series of measurements of the heating rates in surface-electrode ion traps characterized their frequency, distance, and temperature dependencies, but our understanding of the microscopic origin of this noise is still vague. In this work we develop a theoretical model for the electric field noise which is associated with a random distribution of adsorbed atoms on the trap electrode surface. By using first principle calculations of the fluctuating dipole moments of the adsorbed atoms we evaluate the distance, frequency and temperature dependence of the resulting electric field fluctuation spectrum.Our theory calculates the noise spectrum beyond the standard scenario of two-level fluctuators, by incorporating all the relevant vibrational states. The $1/f$ noise is shown to commence at roughly the frequency of the fundamental phonon transition rate and the $d^{-4}$ dependence with distance of the ion from the electrode surface is established.

A. Safavi-Naini; P. Rabl; P. Weck; H. R. Sadeghpour

2011-06-10T23:59:59.000Z

129

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

130

Magnetic lens apparatus for use in high-resolution scanning electron microscopes and lithographic processes  

DOE Patents (OSTI)

Disclosed are lens apparatus in which a beam of charged particlesis brought to a focus by means of a magnetic field, the lens being situated behind the target position. In illustrative embodiments, a lens apparatus is employed in a scanning electron microscopeas the sole lens for high-resolution focusing of an electron beam, and in particular, an electron beam having an accelerating voltage of from about 10 to about 30,000 V. In one embodiment, the lens apparatus comprises an electrically-conducting coil arranged around the axis of the beam and a magnetic pole piece extending along the axis of the beam at least within the space surrounded by the coil. In other embodiments, the lens apparatus comprises a magnetic dipole or virtual magnetic monopole fabricated from a variety of materials, including permanent magnets, superconducting coils, and magnetizable spheres and needles contained within an energy-conducting coil. Multiple-array lens apparatus are also disclosed for simultaneous and/or consecutive imaging of multiple images on single or multiple specimens. The invention further provides apparatus, methods, and devices useful in focusing charged particle beams for lithographic processes.

Crewe, Albert V. (Dune Acres, IN)

2000-01-01T23:59:59.000Z

131

Scanning electron microscopic analyses of Ferrocyanide tank wastes for the Ferrocyanide safety program  

Science Conference Proceedings (OSTI)

This is Fiscal Year 1995 Annual Report on the progress of activities relating to the application of scanning electron microscopy in addressing the Ferrocyanide Safety Issue associated with Hanford Site high-level radioactive waste tanks. The status of the FY 1995 activities directed towards establishing facilities capable of providing SEM based micro-characterization of ferrocyanide tank wastes is described. A summary of key events in the SEM task over FY 1995 and target activities in FY 1996 are presented. A brief overview of the potential applications of computer controlled SEM analytical data in light of analyses of ferrocyanide simulants performed by an independent contractor is also presented

Callaway, W.S.

1995-09-01T23:59:59.000Z

132

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

133

Big microscope  

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

microscope Name: stacy Status: NA Age: NA Location: NA Country: NA Date: Around 1993 Question: What type of Microscope has the highest magnification? Replies: What type of...

134

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

135

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

136

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

137

Correlation between resistance-change effect in transition-metal oxides and secondary-electron contrast of scanning electron microscope images  

Science Conference Proceedings (OSTI)

Conductive atomic-force microscopy (C-AFM) writing is attracting attention as a technique for clarifying the switching mechanism of resistive random-access memory by providing a wide area filled with filaments, which can be regarded as one filament with large radius. The writing area on a nickel-oxide (NiO) film formed by conductive atomic-force microscopy was observed by scanning electron microscope, and a correlation between the contrast in a secondary-electron image (SEI) and the resistance written by C-AFM was revealed. In addition, the dependence of the SEI contrast on the beam accelerating voltage (V{sub accel}) suggests that the resistance-change effect occurs near the surface of the NiO film. As for the effects of electron irradiation and vacuum annealing on the C-AFM writing area, it was shown that the resistance-change effect is caused by exchange of oxygen with the atmosphere at the surface of the NiO film. This result suggests that the low-resistance and high-resistance areas are, respectively, p-type Ni{sub 1+{delta}}O ({delta} =} 0).

Kinoshita, K.; Kishida, S. [Department of Information and Electronics, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552 (Japan); Tottori University Electronic Display Research Center, 522-2 Koyama-Kita, Tottori 680-0941 (Japan); Yoda, T. [Department of Information and Electronics, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552 (Japan)

2011-09-15T23:59:59.000Z

138

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

139

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

140

In Situ Tensile Testing of Single Crystal Molybdenum Alloy Fibers with Various Dislocation Densities in a Scanning Electron Microscope  

SciTech Connect

In-situ tensile tests have been performed in a dual beam focused ion beam and scanning electron microscope on as-grown and prestrained single-crystal molybdenum-alloy (Mo-alloy) fibers. The fibers had approximately square cross sections with submicron edge lengths and gauge lengths in the range of 9-41 {mu}m. In contrast to previously observed yield strengths near the theoretical strength of 10 GPa in compression tests of {approx}1-3-{mu}m long pillars made from similar Mo-alloy single crystals, a wide scatter of yield strengths between 1 and 10 GPa was observed in the as-grown fibers tested in tension. Deformation was dominated by inhomogeneous plastic events, sometimes including the formation of Lueders bands. In contrast, highly prestrained fibers exhibited stable plastic flow, significantly lower yield strengths of {approx}1 GPa, and stress-strain behavior very similar to that in compression. A simple, statistical model incorporating the measured dislocation densities is developed to explain why the tension and compression results for the as-grown fibers are different.

George, Easo P [ORNL; Johanns, K. [University of Tennessee, Knoxville (UTK); Sedlmayr, A. [Karlsruhe Institute of Technology, Karlsruhe, Germany; Phani, P. Sudharshan [University of Tennessee, Knoxville (UTK); Monig, R. [Karlsruhe Institute of Technology, Karlsruhe, Germany; Kraft, O. [Karlsruhe Institute of Technology, Karlsruhe, Germany; Pharr, George M [University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

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141

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

142

Reading Comprehension - Microscopes  

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

Microscopes Microscopes It happened over 300 years _________ since ago before after in Holland. Anton van Leeuwenhoek (AN-tun van LAY-vun-hook) had a new microscope that he had _________ made lost previewed delivered . One day he _________ fell broke looked went through it at a drop of lake water. What he saw surprised him. The water was alive with what Leeuwenhoek called "wee beasties." The microscope made tiny organisms look 200 times _________ farther smaller darker larger than life size. Leeuwenhoek was one of the first scientists to see living things that were that _________ life small darker larger . His work was a giant _________ turtle gorilla step tower for science. Today, microscopes are much stronger. An electron microscope can make tiny organisms look 200,000 times _________ small over under life size. A few

143

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

144

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

145

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

146

Experimental observation and quantum modeling of electron irradiation on single-wall carbon nanotubes  

Science Conference Proceedings (OSTI)

In situ experiments, based on electron irradiation at high temperature in a transmission electron microscope, are used to investigate isolated, packed and crossing single-wall nanotubes. During continuous, uniform atom removal, surfaces of isolated single-wall ...

J. -C. Charlier; M. Terrones; F. Banhart; N. Grobert; H. Terrones; P. M. Ajayan

2003-12-01T23:59:59.000Z

147

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).

148

The TEAM Project: What is the TEAM microscope?  

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

What is the TEAM microscope? The TEAM project will construct a new generation electron microscope designed to incorporate aberration-correcting electron optics, to develop a common...

149

NIST Studies How New Helium Ion Microscope Measures Up  

Science Conference Proceedings (OSTI)

... are studying helium ion microscopes to improve ... analogous to the scanning electron microscope, which was ... are far larger than electrons, they can ...

2012-11-02T23:59:59.000Z

150

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

151

Non-destructive observation of in-grown stacking faults in 4H-SiC epitaxial layer using mirror electron microscope  

SciTech Connect

Mirror electron microscope (MEM) observation has been conducted for a 4-{mu}m-thick n-doped 4H-SiC epitaxial layer. If the sample is simultaneously illuminated with ultraviolet (UV) light of a slightly greater energy than the bandgap energy of 4H-SiC, in-grown stacking faults (IGSFs) can be clearly observed in MEM images. These observations were performed non-destructively, as almost all irradiated electrons returned without impinging the sample surface due to the negative voltage applied to the sample. High spatial resolution observation via MEM showed that multiple IGSFs were stacked up. The phenomenon in which the contrast of the IGSFs vanished in the absence of UV illumination and under UV illumination with a lower energy than the bandgap energy revealed that the origin of the contrast was the negative charging of IGSFs trapping electrons excited by UV light.

Hasegawa, Masaki; Ohno, Toshiyuki [Central Research Laboratory, Hitachi Ltd., 1-280, Higashi-koigakubo, Kokubunji, Tokyo 185-8601 (Japan)

2011-10-01T23:59:59.000Z

152

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.

153

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

154

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 »

155

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

156

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

E-Print Network (OSTI)

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

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

2013-01-01T23:59:59.000Z

157

Effect of high-energy electron irradiation in an electron microscope column on fluorides of alkaline earth elements (CaF{sub 2}, SrF{sub 2}, and BaF{sub 2})  

SciTech Connect

The effect of high-energy (150 eV) electron irradiation in an electron microscope column on crystals of fluorides of alkaline earth elements CaF{sub 2}, SrF{sub 2}, and BaF{sub 2} is studied. During structural investigations by electron diffraction and electron microscopy, the electron irradiation causes chemical changes in MF{sub 2} crystals such as the desorption of fluorine and the accumulation of oxygen in the irradiated area with the formation of oxide MO. The fluorine desorption rate increases significantly when the electron-beam density exceeds the threshold value of {approx}2 Multiplication-Sign 10{sup 3} pA/cm{sup 2}). In BaF{sub 2} samples, the transformation of BaO into Ba(OH){sub 2} was observed when irradiation stopped. The renewal of irradiation is accompanied by the inverse transformation of Ba(OH){sub 2} into BaO. In the initial stage of irradiation of all MF{sub 2} compounds, the oxide phase is in the single-crystal state with a lattice highly matched with the MF{sub 2} matrix. When the irradiation dose is increased, the oxide phase passes to the polycrystalline phase. Gaseous products of MF{sub 2} destruction (in the form of bubbles several nanometers in diameter) form a rectangular array with a period of {approx}20 nm in the sample.

Nikolaichik, V. I. [Russian Academy of Sciences, Institute of Microelectronics Technology and High Purity Materials (Russian Federation); Sobolev, B. P., E-mail: sobolev@ns.crys.ras.ru; Zaporozhets, M. A.; Avilov, A. S. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

2012-03-15T23:59:59.000Z

158

Evaluation of the Extent of Electron Scattering in a Low ...  

Science Conference Proceedings (OSTI)

... of low vacuum scanning electron microscopes has been ... by all scanning electron microscope vendors. ... can help dissipate electrons that accumulate ...

2012-10-02T23:59:59.000Z

159

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

160

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

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

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

SciTech Connect

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

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

2012-07-25T23:59:59.000Z

162

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.

163

Effect of residual chips on the material removal process of the bulk metallic glass studied by in situ scratch testing inside the scanning electron microscope  

Science Conference Proceedings (OSTI)

Research on material removal mechanism is meaningful for precision and ultra-precision manufacturing. In this paper, a novel scratch device was proposed by integrating the parasitic motion principle linear actuator. The device has a compact structure and it can be installed on the stage of the scanning electron microscope (SEM) to carry out in situ scratch testing. Effect of residual chips on the material removal process of the bulk metallic glass (BMG) was studied by in situ scratch testing inside the SEM. The whole removal process of the BMG during the scratch was captured in real time. Formation and growth of lamellar chips on the rake face of the Cube-Corner indenter were observed dynamically. Experimental results indicate that when lots of chips are accumulated on the rake face of the indenter and obstruct forward flow of materials, materials will flow laterally and downward to find new location and direction for formation of new chips. Due to similar material removal processes, in situ scratch testing is potential to be a powerful research tool for studying material removal mechanism of single point diamond turning, single grit grinding, mechanical polishing and grating fabrication.

Huang Hu; Zhao Hongwei; Shi Chengli; Wu Boda; Fan Zunqiang; Wan Shunguang; Geng Chunyang [College of Mechanical Science and Engineering, Jilin University, Renmin Street 5988, Changchun, Jilin 130025 (China)

2012-12-15T23:59:59.000Z

164

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

165

Microscope and method of use  

SciTech Connect

A method and apparatus for electronically focusing and electronically scanning microscopic specimens are given. In the invention, visual images of even moving, living, opaque specimens can be acoustically obtained and viewed with virtually no time needed for processing (i.e., real time processing is used). And planar samples are not required. The specimens (if planar) need not be moved during scanning, although it will be desirable and possible to move or rotate nonplanar specimens (e.g., laser fusion targets) against the lens of the apparatus. No coupling fluid is needed, so specimens need not be wetted. A phase acoustic microscope is also made from the basic microscope components together with electronic mixers.

Bongianni, Wayne L. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

166

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

167

Solid state optical microscope  

DOE Patents (OSTI)

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal. 2 figs.

Young, I.T.

1983-08-09T23:59:59.000Z

168

Solid state optical microscope  

DOE Patents (OSTI)

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal.

Young, Ian T. (Pleasanton, CA)

1983-01-01T23:59:59.000Z

169

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

170

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

171

Microscopic characterization of radionuclide contaminated soils to assist remediation efforts  

Science Conference Proceedings (OSTI)

A combination of optical, scanning, and analytical electron microscopies have been used to describe the nature of radionuclide contamination at several sites. These investigations were conducted to provide information for remediation efforts. This technique has been used successfully with uranium-contaminated soils from Fernald, OH, and Portsmouth, OH, thorium-contaminated soil from a plant in Tennessee, plutonium-contamination sand from Johnston Island in the Pacific Ocean, and incinerator ash from Los Alamos, NM. Selecting the most suitable method for cleaning a particular site is difficult if the nature of the contamination is not understood. Microscopic characterization allows the most appropriate method to be selected for removing the contamination and can show the effect a particular method is having on the soil. A method of sample preparation has been developed that allows direct comparison of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images, enabling characterization of TEM samples to be more representative of the bulk sample.

Buck, E.C.; Brown, N.R.; Dietz, N.L.; Fortner, J.A.; Bates, J.K.

1994-11-01T23:59:59.000Z

172

Magnetodynamics and Spin Electronics  

Science Conference Proceedings (OSTI)

... Spintronics exploits the interaction between electrons' spin angular momentum ... stochastic processes in the form of electron microscope images of ...

2013-05-13T23:59:59.000Z

173

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

174

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).

175

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-07-13T23:59:59.000Z

176

Spin microscope based on optically detected magnetic resonance  

Science Conference Proceedings (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-10-27T23:59:59.000Z

177

Spin microscope based on optically detected magnetic resonance  

SciTech Connect

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-06-29T23:59:59.000Z

178

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of impaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-11-10T23:59:59.000Z

179

Spin microscope based on optically detected magnetic resonance  

SciTech Connect

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2007-12-11T23:59:59.000Z

180

Getting the Point: Real-Time Monitoring of Atomic-Microscope ...  

Science Conference Proceedings (OSTI)

... done with atomic force microscopy (AFM). ... small scales, so researchers use atomic force microscopes. ... of the tip with an electron microscope, a time ...

2012-10-15T23:59:59.000Z

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

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. ...

182

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

183

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

184

The TEAM Project: Who is building the TEAM microscope?  

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

Who is building the TEAM microscope? Led by Lawrence Berkeley National Laboratory's National Center for Electron Microscopy, TEAM is an intensive collaborative project with...

185

On thermodynamic and microscopic reversibility  

E-Print Network (OSTI)

On Thermodynamic and Microscopic Reversibility Abstract. Theof the University of California. On Thermodynamic andMicroscopic Reversibility Thermodynamic reversibility The

Crooks, Gavin E.

2012-01-01T23:59:59.000Z

186

Recurrence Tracking Microscope  

E-Print Network (OSTI)

In order to probe nanostructures on a surface we present a microscope based on the quantum recurrence phenomena. A cloud of atoms bounces off an atomic mirror connected to a cantilever and exhibits quantum recurrences. The times at which the recurrences occur depend on the initial height of the bouncing atoms above the atomic mirror, and vary following the structures on the surface under investigation. The microscope has inherent advantages over existing techniques of scanning tunneling microscope and atomic force microscope. Presently available experimental technology makes it possible to develop the device in the laboratory.

Farhan Saif

2006-04-04T23:59:59.000Z

187

Microscopes - Teacher Overview  

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

Standards of Learning Download this Activity Background: With the invention of the microscope, scientist could see things they never could before. They discovered that we were...

188

Towards a Neutron Microscope  

Science Conference Proceedings (OSTI)

Towards a Neutron Microscope. Summary: ... The novel lens is a Wolter Optic similar in design to the telescope of the CHANDRA x-ray observatory. ...

2013-07-23T23:59:59.000Z

189

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

190

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

191

Microscopic Properties of Horizons  

E-Print Network (OSTI)

We suggest that all horizons of spacetime, no matter whether they are black hole, Rindler or de Sitter horizons, have certain microscopic properties in common. We propose that these propertues may be used as the starting points, or postulates, of a microscopic theory of gravity.

Jarmo Makela

2001-08-13T23:59:59.000Z

192

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

193

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

194

Genomics of Electronic Materials  

Science Conference Proceedings (OSTI)

... Metamaterials; Highly correlated electron materials, eg superconductors, such as ... A near-field scanning microwave microscope for characterization ...

2013-08-08T23:59:59.000Z

195

Soft x-ray laser microscope  

Science Conference Proceedings (OSTI)

The program consisted of two phases (Phase I and Phase II). The goal of the Phase I (first year program) was to design and construct the Soft X-ray Laser Contact Microscope. Such microscope was constructed and adapted to PPL's 18.2nm soft X-ray Laser (SXL), which in turn was modified and prepared for microscopy experiments. Investigation of the photoresist response to 18.2nm laser radiation and transmissivity of 0.1m thick silicion-nitride (Si[sub 3]N[sub 4]) windows were important initial works. The goal of the first year of Phase II was to construct X-ray contact microscope in combination with existing optical phase microscope, already used by biologists. In the second year of Phase II study of dehydrated Horeseshoe Crab and Hela cancer cells were performed with COXRALM. Also during Phase II, the Imaging X-Ray Laser Microscope (IXRALM) was designed and constructed. This paper describes the development of each of the microscopes and their application for research.

Suckewer, P.I.

1990-10-01T23:59:59.000Z

196

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

197

Solid-state optical microscope  

DOE Patents (OSTI)

A solid state optical microscope is described wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. Means for scanning in one of two orthogonal directions are provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal.

Young, I.T.

1981-01-07T23:59:59.000Z

198

A high-resolution field-emission-gun, scanning electron microscope investigation of anisotropic hydrogen decrepitation in Nd-Fe-B-based sintered magnets  

SciTech Connect

In this investigation commercial magnets based on (Nd,Dy){sub 14}(Fe,Co){sub 79}B{sub 7} were prepared by a conventional powder-metallurgy route with a degree of alignment equal to {approx}90% and then exposed to hydrogen at a pressure of 1 bar. The magnets, in the form of cylinders, were observed to decrepitate exclusively from the ends. High-resolution electron microscopy was able to identify the presence of crack formation within the Nd{sub 2}Fe{sub 14}B grains, with the cracks running parallel to the c axis of these grains. Based on the concentration profile for hydrogen in a rare-earth transition-metal material, it is clear that the presence of hydrogen-induced cracks running perpendicular to the ends of the magnet provides for a much more rapidly progressing hydrogen front in this direction than from the sides of the magnet. This results in the magnet exhibiting a macroscopic tendency to decrepitate from the poles of the magnet toward the center. This combination of microstructural modification via particle alignment as part of the sintering process and direct observation via high-resolution electron microscopy has led to a satisfying explanation for the anisotropic hydrogen-decrepitation effect.

Soderznik, Marko; McGuiness, Paul; Zuzek-Rozman, Kristina; Kobe, Spomenka [Department for Nanostructured Materials, Jozef Stefan Institute, Ljubljana 1000 (Slovenia); Skulj, Irena [Magneti Ljubljana, d.d., Stegne 37, 1000, Ljubljana (Slovenia); Yan Gaolin [School of Physics and Technology, Wuhan University, Wuhan 430072 (China)

2010-05-15T23:59:59.000Z

199

Microscope collision protection apparatus  

DOE Patents (OSTI)

A microscope collision protection apparatus for a remote control microscope which protects the optical and associated components from damage in the event of an uncontrolled collision with a specimen, regardless of the specimen size or shape. In a preferred embodiment, the apparatus includes a counterbalanced slide for mounting the microscope's optical components. This slide replaces the rigid mounts on conventional upright microscopes with a precision ball bearing slide. As the specimen contacts an optical component, the contacting force will move the slide and the optical components mounted thereon. This movement will protect the optical and associated components from damage as the movement causes a limit switch to be actuated, thereby stopping all motors responsible for the collision.

DeNure, Charles R. (Pocatello, ID)

2001-10-23T23:59:59.000Z

200

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) ...

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

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

202

Infrared microscope inspection apparatus  

DOE Patents (OSTI)

Apparatus and system for inspecting infrared transparents, such as an array of photovoltaic modules containing silicon solar cells, includes an infrared microscope, at least three sources of infrared light placed around and having their axes intersect the center of the object field and means for sending the reflected light through the microscope. The apparatus is adapted to be mounted on an X-Y translator positioned adjacent the object surface. 4 figs.

Forman, S.E.; Caunt, J.W.

1985-02-26T23:59:59.000Z

203

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

204

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

205

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

206

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

207

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

208

Three-dimensional fabrication and characterisation of core-shell nano-columns using electron beam patterning of Ge-doped SiO{sub 2}  

Science Conference Proceedings (OSTI)

A focused electron beam in a scanning transmission electron microscope (STEM) is used to create arrays of core-shell structures in a specimen of amorphous SiO{sub 2} doped with Ge. The same electron microscope is then used to measure the changes that occurred in the specimen in three dimensions using electron tomography. The results show that transformations in insulators that have been subjected to intense irradiation using charged particles can be studied directly in three dimensions. The fabricated structures include core-shell nano-columns, sputtered regions, voids, and clusters.

Gontard, Lionel C. [Instituto de Ciencia de Materiales de Sevilla (CSIC), 41092 Sevilla (Spain); Jinschek, Joerg R. [FEI Europe, Achtseweg Noord 5, 5600 KA Eindhoven (Netherlands); Ou Haiyan [Department of Photonics, Technical University of Denmark, DK-2800 Kongens Lyngby (Denmark); Verbeeck, Jo [EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium); Dunin-Borkowski, Rafal E. [Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Gruenberg Institute, Forschungszentrum Juelich, D-52425 Juelich (Germany)

2012-06-25T23:59:59.000Z

209

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...

210

Scanning Tunneling Microscopic Characterization of Electron ...  

Science Conference Proceedings (OSTI)

... (7.15nS) for dDT and two order of magnitude larger (0.078nS) than hDT. ... Formation of Silver Nanocube Array via Silica-Polymer Nanocomposites ... of Cu- Nb Multilayers as a Function of Dislocation/Disconnection Content ... Synthesis of W–25 Wt%Cu Composite Powders Using Ammonium Para Tungstate and Copper ...

211

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

212

Particle Formation from Pulsed Laser Irradiation of SootAggregates studied with scanning mobility particle sizer, transmissionelectron microscope and near-edge x-ray absorption fine structure.  

Science Conference Proceedings (OSTI)

We investigated the physical and chemical changes induced in soot aggregates exposed to laser radiation using a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope to perform near-edge x-ray absorption fine structure spectroscopy. Laser-induced nanoparticle production was observed at fluences above 0.12 J/cm(2) at 532 nm and 0.22 J/cm(2) at 1064 nm. Our results indicate that new particle formation proceeds via (1) vaporization of small carbon clusters by thermal or photolytic mechanisms, followed by homogeneous nucleation, (2) heterogeneous nucleation of vaporized carbon clusters onto material ablated from primary particles, or (3) both processes.

Michelsen, Hope A.; Tivanski, Alexei V.; Gilles, Mary K.; vanPoppel, Laura H.; Dansson, Mark A.; Buseck, Peter R.; Buseck, Peter R.

2007-02-20T23:59:59.000Z

213

Ion photon emission microscope  

DOE Patents (OSTI)

An ion beam analysis system that creates microscopic multidimensional image 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 ion-induced photons emitted at that point with a signal from a detector that measures the interaction of that ion within the sample. The emitted photons are collected in the lens system of a conventional optical microscope, and projected on the image plane of a high resolution single photon position sensitive detector. Position signals from this photon detector are then correlated in time with electrical effects, including the malfunction of digital circuits, detected within the sample that were caused by the individual ion that created these photons initially.

Doyle, Barney L. (Albuquerque, NM)

2003-04-22T23:59:59.000Z

214

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...

215

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 ...

216

A Microscopic Double-Slit Experiment  

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

A Microscopic Double-Slit A Microscopic Double-Slit Experiment A Microscopic Double-Slit Experiment Print Wednesday, 29 February 2012 00:00 Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

217

Particles from Comet 81P/Wild 2 Viewed by ALS Microscopes  

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

and Beamline 11.0.2, it was possible to combine this technique with the scanning transmission x-ray microscope (STXM) to image the spatial distribution of the compounds. Some...

218

Particles from Comet 81P/Wild 2 Viewed by ALS Microscopes  

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

5.3.2 and Beamline 11.0.2, it was possible to combine this technique with the scanning transmission x-ray microscope (STXM) to image the spatial distribution of the compounds....

219

Atomic Resolution Imaging with a sub-50 pm Electron Probe  

SciTech Connect

Using a highly coherent focused electron probe in a 5th order aberration-corrected transmission electron microscope, we report on resolving a crystal spacing less than 50 pm. Based on the geometrical source size and residual coherent and incoherent axial lens aberrations, an electron probe is calculated, which is theoretically capable of resolving an ideal 47 pm spacing with 29percent contrast. Our experimental data show the 47 pm spacing of a Ge 114 crystal imaged with 11-18percent contrast at a 60-95percent confidence level, providing the first direct evidence for sub 50-pm resolution in ADF STEM imaging.

Erni, Rolf P.; Rossell, Marta D.; Kisielowski, Christian; Dahmen, Ulrich

2009-03-02T23:59:59.000Z

220

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...

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

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

222

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...

223

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...

224

Soft x-ray laser microscope. Final report  

Science Conference Proceedings (OSTI)

The program consisted of two phases (Phase I and Phase II). The goal of the Phase I (first year program) was to design and construct the Soft X-ray Laser Contact Microscope. Such microscope was constructed and adapted to PPL`s 18.2nm soft X-ray Laser (SXL), which in turn was modified and prepared for microscopy experiments. Investigation of the photoresist response to 18.2nm laser radiation and transmissivity of 0.1m thick silicion-nitride (Si{sub 3}N{sub 4}) windows were important initial works. The goal of the first year of Phase II was to construct X-ray contact microscope in combination with existing optical phase microscope, already used by biologists. In the second year of Phase II study of dehydrated Horeseshoe Crab and Hela cancer cells were performed with COXRALM. Also during Phase II, the Imaging X-Ray Laser Microscope (IXRALM) was designed and constructed. This paper describes the development of each of the microscopes and their application for research.

Suckewer, P.I.

1990-10-01T23:59:59.000Z

225

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

226

A Microscopic Double-Slit Experiment  

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

A Microscopic Double-Slit Experiment Print A Microscopic Double-Slit Experiment Print Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

227

A Microscopic Double-Slit Experiment  

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

A Microscopic Double-Slit Experiment Print A Microscopic Double-Slit Experiment Print Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

228

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

229

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

230

On thermodynamic and microscopic reversibility  

SciTech Connect

The word 'reversible' has two (apparently) distinct applications in statistical thermodynamics. A thermodynamically reversible process indicates an experimental protocol for which the entropy change is zero, whereas the principle of microscopic reversibility asserts that the probability of any trajectory of a system through phase space equals that of the time reversed trajectory. However, these two terms are actually synonymous: a thermodynamically reversible process is microscopically reversible, and vice versa.

Crooks, Gavin E.

2011-07-12T23:59:59.000Z

231

HIGH TEMPERATURE MICROSCOPE AND FURNACE  

DOE Patents (OSTI)

A high-temperature microscope is offered. It has a reflecting optic situated above a molten specimen in a furnace and reflecting the image of the same downward through an inert optic member in the floor of the furnace, a plurality of spaced reflecting plane mirrors defining a reflecting path around the furnace, a standard microscope supported in the path of and forming the end terminus of the light path.

Olson, D.M.

1961-01-31T23:59:59.000Z

232

The NCEM one-Angstrom microscope project reaches 0.89 Angstrom resolution  

SciTech Connect

Sub-Angstrom transmission electron microscopy to a resolution of 0.89 has been achieved at the National Center for Electron Microscopy and is available to electron microscopists who have a requirement for this level of resolution.

O'Keefe, Michael A.; Wang, Y.C.

2000-02-17T23:59:59.000Z

233

Real-Time and Post-Reaction Microscopic Structural Analysis of Biomass Undergoing Pyrolysis  

Science Conference Proceedings (OSTI)

The structural complexity of unprocessed plant tissues used for thermochemical conversion of biomass to fuels and energy impedes heat and mass transfer and may increase the occurrence of tar-forming secondary chemical reactions. At industrial scales, gas and liquid products trapped within large biomass particles may reduce net fuel yields and increase tars, impacting industrial operations and increasing overall costs. Real-time microscopic analysis of poplar (Populus sp.) wood samples undergoing anoxic, pyrolytic heat treatment has revealed a pattern of tissue and macropore expansion and collapse. Post-reaction structural analyses of biomass char (biochar) by light and transmission electron microscopy have provided direct structural evidence of pyrolysis product mass-transfer issues, including trapped pyrolysis products and cell wall compression, and have demonstrated the impact of heat-transfer problems on biomass particles. Finally, microscopic imaging has revealed that pyrolyzed/gasified biochars recovered from a fluidized bed reactor retain a similar pre-reaction basic plant tissue structure as the samples used in this study, suggesting that the phenomena observed here are representative of those that occur in larger scale reactors.

Haas, T. J.; Nimlos, M. R.; Donohoe, B. S.

2009-01-01T23:59:59.000Z

234

Reading Comprehension - Dissecting and Compound Microscopes  

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

Dissecting and Compound Microscopes Two types of microscopes. _________ Dissecting and Compound Microscopes Two types of microscopes. _________ Dissecting Microscope Compound Microscope _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ Dissecting Microscope Compound Microscope _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light

235

Spectro-Microscopic Measurements of Carbonaceous Aerosol Aging in Central California  

Science Conference Proceedings (OSTI)

Carbonaceous aerosols are responsible for large uncertainties in climate models, degraded visibility, and adverse health effects. The Carbonaceous Aerosols and Radiative Effects Study (CARES) was designed to study carbonaceous aerosols in the natural environment of Central Valley, California, and learn more about their atmospheric formation and aging. This paper presents results from spectro-microscopic measurements of carbonaceous particles collected during CARES at the time of pollution accumulation event (June 27-29, 2010), when in situ measurements indicated an increase in the organic carbon content of aerosols as the Sacramento urban plume aged. Computer controlled scanning electron microscopy coupled with an energy dispersive X-ray detector (CCSEM/EDX) and scanning transmission X-ray microscopy coupled with near edge X-ray absorption spectroscopy (STXM/NEXAFS) were used to probe the chemical composition and morphology of individual particles. It was found that the mass of organic carbon on individual particles increased through condensation of secondary organic aerosol. STXM/NEXAFS indicated that the number fraction of homogenous organic particles lacking inorganic inclusions (greater than ~50 nm diameter) increased with plume age as did the organic mass per particle. Comparison of the CARES spectro-microscopic data set with a similar dataset obtained in Mexico City during the MILAGRO campaign showed that individual particles in Mexico City contained twice as much carbon as those sampled during CARES. The number fraction of soot particles at the Mexico City urban site (30%) was larger than at the CARES urban site (10%) and the most aged samples from CARES contained less carbon-carbon double bonds. Differences between carbonaceous particles in Mexico City and California result from different sources, photochemical conditions, gas phase reactants, and secondary organic aerosol precursors. The detailed results provided by these spectro-microscopic measurements will allow for a comprehensive evaluation of aerosol process models used in climate research.

Moffet, Ryan C.; Rodel, Tobias; Kelly, Stephen T.; Yu, Xiao-Ying; Carroll, Gregory; Fast, Jerome D.; Zaveri, Rahul A.; Laskin, Alexander; Gilles, Mary K.

2013-10-29T23:59:59.000Z

236

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

237

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

238

The History of the Microscope  

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

the Microscope the Microscope Nature Bulletin No. 506 November 9, 1957 Forest Preserve District of Cook County Daniel Ryan, President Roberts Mann, Conservation Editor David H. Thompson, Senior Naturalist THE HISTORY OF THE MICROSCOPE During that historic period known as the Renaissance, after the "dark" Middle Ages, there occurred the inventions of printing, gunpowder and the mariner's compass, followed by the discovery of America. Equally remarkable was the invention of the microscope: an instrument that enables the human eye, by means of a lens or combinations of lenses, to observe enlarged images of tiny objects. It made visible the fascinating details of worlds within worlds. Long before, in the hazy unrecorded past, someone picked up a piece of transparent crystal thicker in the middle than at the edges, looked through it, and discovered that it made things look larger. Someone also found that such a crystal would focus the sun's rays and set fire to a piece of parchment or cloth. Magnifiers and "burning glasses" are mentioned in the writings of Seneca and Pliny the Elder, Roman philosophers during the first century A. D., but apparently they were not used much until the invention of spectacles, toward the end of the 13th century. They were named lenses because they are shaped like the seeds of a lentil.

239

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

240

Survey of Transmission Cost Allocation Methodologies for Regional Transmission Organizations  

Science Conference Proceedings (OSTI)

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

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

2011-02-01T23:59:59.000Z

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

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...

242

Hyperbaric hydrothermal atomic force microscope  

SciTech Connect

A hyperbaric hydrothermal atomic force microscope (AFM) is provided to image solid surfaces in fluids, either liquid or gas, at pressures greater than normal atmospheric pressure. The sample can be heated and its surface imaged in aqueous solution at temperatures greater than 100.degree. C. with less than 1 nm vertical resolution. A gas pressurized microscope base chamber houses the stepper motor and piezoelectric scanner. A chemically inert, flexible membrane separates this base chamber from the sample cell environment and constrains a high temperature, pressurized liquid or gas in the sample cell while allowing movement of the scanner. The sample cell is designed for continuous flow of liquid or gas through the sample environment.

Knauss, Kevin G. (Livermore, CA); Boro, Carl O. (Milpitas, CA); Higgins, Steven R. (Laramie, WY); Eggleston, Carrick M. (Laramie, WY)

2002-01-01T23:59:59.000Z

243

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...

244

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...

245

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

246

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  ...

247

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...

248

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

249

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.

250

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

251

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

252

Regular Scanning Tunneling Microscope Tips can be Intrinsically Chiral  

Science Conference Proceedings (OSTI)

We report our discovery that regular scanning tunneling microscope tips can themselves be chiral. This chirality leads to differences in electron tunneling efficiencies through left- and right-handed molecules, and, when using the tip to electrically excite molecular rotation, large differences in rotation rate were observed which correlated with molecular chirality. As scanning tunneling microscopy is a widely used technique, this result may have unforeseen consequences for the measurement of asymmetric surface phenomena in a variety of important fields.

Tierney, Heather L.; Murphy, Colin J.; Sykes, E. Charles H. [Department of Chemistry, Tufts University, Medford, Massachusetts 02155-5813 (United States)

2011-01-07T23:59:59.000Z

253

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.

254

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

255

Atomic force microscope: Enhanced sensitivity  

SciTech Connect

Atomic force microscopes (AFMs) are a recent development representing the state of the art in measuring ultrafine surface features. Applications are found in such fields of research as biology, microfabrication, material studies, and surface chemistry. Fiber-optic interferometer techniques developed at LLNL offer the potential of improving the vertical resolution of these instruments by up to 2 orders of magnitude. We are attempting to replace the current AFM measurement scheme, which consists of an optical beam deflection approach, with our fiber-optic interferometer scheme, a much more sensitive displacement measurement technique. In performing this research, we hope to accomplish two important goals; (1) to enhance the sensitivity of the AFM, and (2) to achieve important improvements in our fiber-optic interferometer technology.

Davis, D.T.

1995-06-01T23:59:59.000Z

256

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

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

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

257

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

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

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

258

Integrated Dynamic Electron Solutions, Inc. | Department of Energy  

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

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

259

Probing the electronic structure and optical response of a graphene quantum disk supported on monolayer graphene  

SciTech Connect

In this paper, we show that a graphene quantum disk (GQD) can be generated on monolayer graphene via structural modification using the electron beam. The electronic structure and local optical responses of the GQD, supported on monolayer graphene, were probed with electron energy-loss spectrum imaging on an aberration-corrected scanning transmission electron microscope. We observe that for small GQD, {approx}1.3 nm in diameter, the electronic structure and optical response are governed by the dominating edge states, and are distinctly different from either monolayer graphene or double-layer graphene. Highly localized plasmon modes are generated at the GQD due to the confinement from the edge of the GQD in all directions. The highly localized optical response from GQDs could find use in designing nanoscale optoelectronic and plasmonic devices based on monolayer graphene.

Zhou, Wu [Vanderbilt University; Pennycook, Stephen J [ORNL; Idrobo Tapia, Juan C [ORNL

2012-01-01T23:59:59.000Z

260

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

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

262

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

263

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

264

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

265

Microstructure of Rapidly Solidified Powders  

Science Conference Proceedings (OSTI)

have been studied in the transmission electron microscope ... transmission electron microscope .... by characteristic x-ray emission lines is on the order of 30nm.

266

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

267

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.

268

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 ...

269

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 ...

270

NIST's New Scanning Probe Microscope is Supercool  

Science Conference Proceedings (OSTI)

... The microscope is mounted on a 6-ton granite table (4), also supported by pneumatic isolators. The cryostat (5) is mounted ...

2011-01-03T23:59:59.000Z

271

NIST Physicists 'Entangle' Microscopic Drum's Beat with ...  

Science Conference Proceedings (OSTI)

... entangled” a microscopic mechanical drum with electrical signals ... Entanglement has technological uses. ... cooled" the drum to a very low energy level ...

2013-10-22T23:59:59.000Z

272

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

273

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

274

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

275

Scanning x-ray microscope  

Science Conference Proceedings (OSTI)

A scanning x-ray microscope is described including: an x-ray source capable of emitting a beam of x-rays; a collimator positioned to receive the beam of x-rays and to collimate this beam, a focusing cone means to focus the beam of x-rays, directed by the collimator, onto a focal plane, a specimen mount for supporting a specimen in the focal plane to receive the focused beam of x-rays, and x-ray beam scanning means to relatively move the specimen and the focusing cone means and collimator to scan the focused x-ray beam across the specimen. A detector is disposed adjacent the specimen to detect flourescent photons emitted by the specimen upon exposure to the focused beam of x-rays to provide an electrical output representative of this detection. Means are included for displaying and/or recording the information provided by the output from the detector, as are means for providing information to the recording and/or display means representative of the scan rate and position of the focused x-ray beam relative to the specimen whereby the recording and/or display means can correlate the information received to record and/or display quantitive and distributive information as to the quantity and distribution of elements detected in the specimen. Preferably there is provided an x-ray beam modulation means upstream, relative to the direction of emission of the xray beam, of the focusing cone means.

Wang, C.

1982-02-23T23:59:59.000Z

276

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...

277

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...

278

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

279

Highly Reproducible Nanolithography by Dynamic Plough of an Atomic-Force Microscope Tip and Thermal-Annealing Treatment  

Science Conference Proceedings (OSTI)

An approach has been developed to use atomic-force microscope (AFM) to pattern materials at the nanoscale in a controlled manner. By introducing a thermal-annealing process above the glass-transition temperature of poly (methylmethacrylate) (PMMA), the ... Keywords: 2-D electron gas, Atomic-force microscope (AFM), nanolithography, self-switching diodes (SSDs)

Xiaofeng Lu; C. Balocco; Fuhua Yang; A. M. Song

2011-01-01T23:59:59.000Z

280

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.

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

Disorder-Induced Microscopic Magnetic Memory  

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

Disorder-Induced Microscopic Disorder-Induced Microscopic Magnetic Memory Disorder-Induced Microscopic Magnetic Memory Print Wednesday, 26 October 2005 00:00 The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

282

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

283

Zeiss Ultra-60 Field Emission Scanning Electron Microscope ...  

Science Conference Proceedings (OSTI)

... cover panels, particularly those on the electro-optic ... Units in the vacuum display windows can be ... mouse button) in the parameter display window. ...

2013-01-18T23:59:59.000Z

284

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

285

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

286

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

287

Acceleration of non-relativistic electrons at a dielectric grating structure: Status report  

Science Conference Proceedings (OSTI)

We report on an experiment aiming at a proof-of-concept of a non-relativistic direct laser accelerator. The system is based on a fused-silica transmission grating illuminated by Titanium:sapphire femtosecond pulses in order to excite evanescent spatial modes, which propagate synchronously with 28 keV electrons originating from an electron column of a scanning electron microscope. The grating period is 750 nm, and we use the third spatial harmonic to continuously accelerate the non-relativistic electrons. With a laser pulse energy of about 150 nJ numerical simulations show expected accelerating gradients of up to 60 MeV/m and an energy gain of around 300 eV at a distance of 100 nm away from the grating surface. The current status of the experiment is reported.

Breuer, John; Hommelhoff, Peter [Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching (Germany)

2012-12-21T23:59:59.000Z

288

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.

289

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

290

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

291

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

292

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

293

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

294

Disorder-Induced Microscopic Magnetic Memory  

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

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

295

Disorder-Induced Microscopic Magnetic Memory  

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

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

296

Laser Scanning Two Photon and Confocal Microscope  

Science Conference Proceedings (OSTI)

... The SP5 is a laser scanning two-photon and confocal microscope equipped with ... nm HeNe, and tunable IR (680 nm - 1060 nm) lasers * 4 internal ...

2012-10-01T23:59:59.000Z

297

Electron spin resonance shift and linewidth broadening of nitrogen-vacancy centers in diamond as a function of electron irradiation dose  

SciTech Connect

A high-nitrogen-concentration diamond sample was subjected to 200-keV electron irradiation using a transmission electron microscope. The optical and spin-resonance properties of the nitrogen-vacancy (NV) color centers were investigated as a function of the irradiation dose up to 6.4 Multiplication-Sign 10{sup 21} e{sup -}/cm{sup 2}. The microwave transition frequency of the NV{sup -} center was found to shift by up to 0.6% (17.1 MHz) and the linewidth broadened with increasing electron-irradiation dose. Unexpectedly, the measured magnetic sensitivity is best at the lowest irradiation dose, even though the NV concentration increases monotonically with increasing dose. This is in large part due to a sharp reduction in optically detected spin contrast at higher doses.

Kim, Edwin [Ramtron International Corporation, 1850 Ramtron Drive, Colorado Springs, Colorado 80921 (United States); Acosta, Victor M. [Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California 94304 (United States); Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Bauch, Erik [Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Technische Universitaet Berlin, Hardenbergstrasse 28, 10623 Berlin (Germany); Budker, Dmitry [Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Hemmer, Philip R. [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843-3128 (United States)

2012-08-20T23:59:59.000Z

298

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

299

Highly charged ion based time of flight emission microscope  

DOE Patents (OSTI)

A highly charged ion based time-of-flight emission microscope has been designed, which improves the surface sensitivity of static SIMS measurements because of the higher ionization probability of highly charged ions. Slow, highly charged ions are produced in an electron beam ion trap and are directed to the sample surface. The sputtered secondary ions and electrons pass through a specially designed objective lens to a microchannel plate detector. This new instrument permits high surface sensitivity (10.sup.10 atoms/cm.sup.2), high spatial resolution (100 nm), and chemical structural information due to the high molecular ion yields. The high secondary ion yield permits coincidence counting, which can be used to enhance determination of chemical and topological structure and to correlate specific molecular species.

Barnes, Alan V. (Livermore, CA); Schenkel, Thomas (San Francisco, CA); Hamza, Alex V. (Livermore, CA); Schneider, Dieter H. (Livermore, CA); Doyle, Barney (Albuquerque, NM)

2001-01-01T23:59:59.000Z

300

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...

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

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

302

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

303

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

304

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

305

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

306

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...

307

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...

308

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

309

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.

310

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

311

NIST Manuscript Publication Search  

Science Conference Proceedings (OSTI)

... 1147 - 1155. Keywords: In situ TEM, environmental scanning transmission electron microscope (ESTEM), catalysis, nanowires, nanotubes,. ...

2012-11-01T23:59:59.000Z

312

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...

313

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

314

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...

315

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...

316

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,...

317

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).

318

The Nature of the Distinctive Microscopic Features in R5(SixGe1-x)4 Magnetic Refrigeration Materials  

Science Conference Proceedings (OSTI)

Magnetic refrigeration is a promising technology that offers a potential for high energy efficiency. The giant magnetocaloric effect of the R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys (where R=rare-earth and O {le} x {le} 1), which was discovered in 1997, make them perfect candidates for magnetic refrigeration applications. In this study the microstructures of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} alloys have been characterized using electron microscopy techniques, with the focus being on distinctive linear features first examined in 1999. These linear features have been observed in R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys prepared from different rare-earths (Gd, Tb, Dy and Er) with different crystal structures (Gd{sub 5}Si{sub 4}-type orthorhombic, monoclinic and Gd{sub 5}Ge{sub 4}-type orthorhombic). Systematic scanning electron microscope studies revealed that these linear features are actually thin-plates, which grow along specific directions in the matrix material. The crystal structure of the thin-plates has been determined as hexagonal with lattice parameters a=b=8.53 {angstrom} and c=6.40 {angstrom} using selected area diffraction (SAD). Energy dispersive spectroscopy analysis, carried out in both scanning and transmission electron microscopes, showed that the features have a composition approximating to R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3}.phase. Orientation relationship between the matrix and the thin-plates has been calculated as [- 1010](1-211){sub p}//[010](10-2){sub m}. The growth direction of the thin plates are calculated as (22 0 19) and (-22 0 19) by applying the Ag approach of Zhang and Purdy to the SAD patterns of this system. High Resolution TEM images of the Gd{sub 5}Ge{sub 4} were used to study the crystallographic relationship. A terrace-ledge structure was observed at the interface and a 7{sup o} rotation of the reciprocal lattices with respect to each other, consistent with the determined orientation relationship, was noted. Both observations are consistent with the stated hypothesis that the growth direction of the thin-plates is parallel to an invariant line direction. Based on the terrace-ledge structure of the thin-plate interface a displacive-diffusional growth mechanism has been proposed to explain the rapid formation of the R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3} plates.

Ozan Ugurlu

2006-05-01T23:59:59.000Z

319

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)

320

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

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

Microscopic Probes of High-Temperature Superconductivity  

Science Conference Proceedings (OSTI)

The granularity of the cuprate superconductors limits the effectiveness of many experimental probes that average over volumes containing many atoms. This report presents theoretical studies on muon spin relaxation and positron annihilation, two microscopic experimental techniques that can probe the properties of both high- and low-temperature superconductors on the atomic scale.

1992-07-01T23:59:59.000Z

322

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:

323

Merchant Transmission Investment  

E-Print Network (OSTI)

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

Joskow, Paul; Tirole, Jean

2004-06-16T23:59:59.000Z

324

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

325

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

326

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

327

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

328

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

329

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

330

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

331

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

332

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

333

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

334

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

335

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

336

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...

337

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...

338

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

339

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

340

Determination of the displacement energy of O, Si and Zr under electron beam irradiation  

Science Conference Proceedings (OSTI)

The response of nanocrystalline, stabilizer-free cubic zirconia thin films on a Si substrate to electron beam irradiation with energies of 4, 110 and 200 keV and fluences up to {approx}1.5 x 10{sup 22} e m{sup -2} has been studied to determine the displacement energies. The 110 and 200 keV irradiations were performed in situ using a transmission electron microscope; the 4 keV irradiations were performed ex situ using an electron gun. In all three irradiations, no structural modification of the zirconia was observed, despite the high fluxes and fluences. However the Si substrate on which the zirconia film was deposited was amorphized under the 200 keV electron irradiation. Examination of the electron-solid interactions reveals that the kinetic energy transfer from the 200 keV electrons to the silicon lattice is sufficient to cause atomic displacements, resulting in amorphization. The kinetic energy transfer from the 200 keV electrons to the oxygen sub-lattice of the zirconia may be sufficient to induce defect production, however, no evidence of defect production was observed. The displacement cross-section value of Zr was found to be {approx}400 times greater than that of O indicating that the O atoms are effectively screened from the electrons by the Zr atoms, and, therefore, the displacement of O is inefficient.

Edmondson, Philip D [ORNL; Weber, William J [ORNL; Namavar, Fereydoon [University of Nebraska Medical Center; Zhang, Yanwen [ORNL

2012-01-01T23:59:59.000Z

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

Markov Random Field Based Automatic Image Alignment for ElectronTomography  

SciTech Connect

Cryo electron tomography (cryo-ET) is the primary method for obtaining 3D reconstructions of intact bacteria, viruses, and complex molecular machines ([7],[2]). It first flash freezes a specimen in a thin layer of ice, and then rotates the ice sheet in a transmission electron microscope (TEM) recording images of different projections through the sample. The resulting images are aligned and then back projected to form the desired 3-D model. The typical resolution of biological electron microscope is on the order of 1 nm per pixel which means that small imprecision in the microscope's stage or lenses can cause large alignment errors. To enable a high precision alignment, biologists add a small number of spherical gold beads to the sample before it is frozen. These beads generate high contrast dots in the image that can be tracked across projections. Each gold bead can be seen as a marker with a fixed location in 3D, which provides the reference points to bring all the images to a common frame as in the classical structure from motion problem. A high accuracy alignment is critical to obtain a high resolution tomogram (usually on the order of 5-15nm resolution). While some methods try to automate the task of tracking markers and aligning the images ([8],[4]), they require user intervention if the SNR of the image becomes too low. Unfortunately, cryogenic electron tomography (or cryo-ET) often has poor SNR, since the samples are relatively thick (for TEM) and the restricted electron dose usually results in projections with SNR under 0 dB. This paper shows that formulating this problem as a most-likely estimation task yields an approach that is able to automatically align with high precision cryo-ET datasets using inference in graphical models. This approach has been packaged into a publicly available software called RAPTOR-Robust Alignment and Projection estimation for Tomographic Reconstruction.

Moussavi, Farshid; Amat, Fernando; Comolli, Luis R.; Elidan, Gal; Downing, Kenneth H.; Horowitz, Mark

2007-11-30T23:59:59.000Z

342

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

343

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

344

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

345

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

346

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

347

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

348

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

349

Electricity Transmission and Distribution Technologies ...  

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

350

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...

351

Transmission eigenvalues for elliptic operators  

E-Print Network (OSTI)

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

Michael Hitrik; Katsiaryna Krupchyk; Petri Ola; Lassi Päivärinta

2010-07-03T23:59:59.000Z

352

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...

353

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

354

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

355

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

356

application of direct aging to allvac 718plus™ alloy for improved ...  

Science Conference Proceedings (OSTI)

and scanning electron microscopes (OP and SEM). ... Transmission electron microscope (TEM) structures of materials subjected to solution-age and direct age ...

357

Materials Science Portal  

Science Conference Proceedings (OSTI)

... Microscopy This project develops low-energy transmission electron diffraction, imaging, and spectroscopy in the scanning electron microscope, to ...

2013-08-08T23:59:59.000Z

358

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

359

Bulk Power Transmission Study  

E-Print Network (OSTI)

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

John, T.

1988-09-01T23:59:59.000Z

360

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 microscopes" 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

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

362

Scanning tip microwave near field microscope  

SciTech Connect

A microwave near field microscope has a novel microwave probe structure wherein the probing field of evanescent radiation is emitted from a sharpened metal tip instead of an aperture or gap. This sharpened tip, which is electrically and mechanically connected to a central electrode, extends through and beyond an aperture in an endwall of a microwave resonating device such as a microwave cavity resonator or a microwave stripline resonator. Since the field intensity at the tip increases as the tip sharpens, the total energy which is radiated from the tip and absorbed by the sample increases as the tip sharpens. The result is improved spatial resolution without sacrificing sensitivity.

Xiang, Xiao-Dong (Alameda, CA); Schultz, Peter G. (Oakland, CA); Wei, Tao (Albany, CA)

1998-01-01T23:59:59.000Z

363

Acoustic microscope surface inspection system and method  

DOE Patents (OSTI)

An acoustic microscope surface inspection system and method in which pulses of high frequency electrical energy are applied to a transducer which forms and focuses acoustic energy onto a selected location on the surface of an object and receives energy from the location and generates electrical pulses. The phase of the high frequency electrical signal pulses are stepped with respected to the phase of a reference signal at said location. An output signal is generated which is indicative of the surface of said selected location. The object is scanned to provide output signals representative of the surface at a plurality of surface locations.

Khuri-Yakub, Butrus T. (Palo Alto, CA); Parent, Philippe (Chilly-Mazarin, FR); Reinholdtsen, Paul A. (Seattle, WA)

1991-01-01T23:59:59.000Z

364

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

365

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

366

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...

367

FINAL PROJECT REPORT LOAD MODELING TRANSMISSION RESEARCH  

E-Print Network (OSTI)

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

Lesieutre, Bernard

2013-01-01T23:59:59.000Z

368

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

369

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...

370

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...

371

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...

372

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

373

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

374

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

375

Microscopic Derivation of an Isothermal Thermodynamic Transformation  

E-Print Network (OSTI)

We obtain macroscopic isothermal thermodynamic transformations by space-time scalings of a microscopic Hamiltonian dynamics in contact with a heat bath. The microscopic dynamics is given by a chain of anharmonic oscillators subject to a varying tension (external force) and the contact with the heat bath is modeled by independent Langevin dynamics acting on each particle. After a diffusive space-time scaling and cross-graining, the profile of volume converges to the solution of a deterministic diffusive equation with boundary conditions given by the applied tension. This defines an irreversible thermodynamic transformation from an initial equilibrium to a new equilibrium given by the final tension applied. Quasi static reversible isothermal transformations are then obtained by a further time scaling. Heat is defined as the total flux of energy exchanged between the system and the heat bath. Then we prove that the relation between the limit heat, work, free energy and thermodynamic entropy agree with the first and second principle of thermodynamics.

Stefano Olla

2013-10-02T23:59:59.000Z

376

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

377

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...

378

The Use of Micro-X-ray Fluorescence in a Scanning Electron ...  

Science Conference Proceedings (OSTI)

An X-ray gun with focusing capillary fiber optics interfaced with a scanning electron microscope (SEM) is used for semi-quantitative XRF microanalysis by energy ...

379

Microscopic Description of Nuclear Fission Dynamics  

E-Print Network (OSTI)

We discuss possible avenues to study fission dynamics starting from a time-dependent mean-field approach. Previous attempts to study fission dynamics using the time-dependent Hartree-Fock (TDHF) theory are analyzed. We argue that different initial conditions may be needed to describe fission dynamics depending on the specifics of the fission phenomenon and propose various approaches towards this goal. In particular, we provide preliminary calculations for studying fission following a heavy-ion reaction using TDHF with a density contraint. Regarding prompt muon-induced fission, we also suggest a new approach for combining the time-evolution of the muonic wave function with a microscopic treatment of fission dynamics via TDHF.

A. S. Umar; V. E. Oberacker; J. A. Maruhn; P. -G. Reinhard

2010-03-22T23:59:59.000Z

380

Chemical Power for Microscopic Robots in Capillaries  

E-Print Network (OSTI)

The power available to microscopic robots (nanorobots) that oxidize bloodstream glucose while aggregated in circumferential rings on capillary walls is evaluated with a numerical model using axial symmetry and time-averaged release of oxygen from passing red blood cells. Robots about one micron in size can produce up to several tens of picowatts, in steady-state, if they fully use oxygen reaching their surface from the blood plasma. Robots with pumps and tanks for onboard oxygen storage could collect oxygen to support burst power demands two to three orders of magnitude larger. We evaluate effects of oxygen depletion and local heating on surrounding tissue. These results give the power constraints when robots rely entirely on ambient available oxygen and identify aspects of the robot design significantly affecting available power. More generally, our numerical model provides an approach to evaluating robot design choices for nanomedicine treatments in and near capillaries.

Hogg, Tad

2009-01-01T23:59:59.000Z

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

Long working distance incoherent interference microscope  

DOE Patents (OSTI)

A full-field imaging, long working distance, incoherent interference microscope suitable for three-dimensional imaging and metrology of MEMS devices and test structures on a standard microelectronics probe station. A long working distance greater than 10 mm allows standard probes or probe cards to be used. This enables nanometer-scale 3-dimensional height profiles of MEMS test structures to be acquired across an entire wafer while being actively probed, and, optionally, through a transparent window. An optically identical pair of sample and reference arm objectives is not required, which reduces the overall system cost, and also the cost and time required to change sample magnifications. Using a LED source, high magnification (e.g., 50.times.) can be obtained having excellent image quality, straight fringes, and high fringe contrast.

Sinclair, Michael B. (Albuquerque, NM); De Boer, Maarten P. (Albuquerque, NM)

2006-04-25T23:59:59.000Z

382

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

383

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...

384

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...

385

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...

386

Generalized drift-diffusion for microscopic thermoelectricity  

E-Print Network (OSTI)

Although thermoelectric elements increasingly incorporate nano-scale features in similar material systems as other micro-electronic devices, the former are described in the language of irreversible thermodynamics while ...

Santhanam, Parthiban

2009-01-01T23:59:59.000Z

387

Measuring charge trap occupation and energy level in CdSe/ZnS quantum dots using a scanning tunneling microscope  

E-Print Network (OSTI)

We use a scanning tunneling microscope to probe single-electron charging phenomena in individual CdSe/ZnS (core/shell) quantum dots (QDs) at room temperature. The QDs are deposited on top of a bare Au thin film and form a ...

Bulovic, Vladimir

388

The interior transmission problem and bounds on transmission eigenvalues  

E-Print Network (OSTI)

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

Michael Hitrik; Katsiaryna Krupchyk; Petri Ola; Lassi Päivärinta

2010-09-28T23:59:59.000Z

389

The interior transmission problem and bounds on transmission eigenvalues  

E-Print Network (OSTI)

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

Hitrik, Michael; Ola, Petri; Päivärinta, Lassi

2010-01-01T23:59:59.000Z

390

Investigating the electronic structure of fluorite-structured oxide compounds: comparison of experimental EELS with first principles calculations  

SciTech Connect

Energy loss spectra from fluorite-structured ZrO2, CeO2, and UO2 compounds are compared with theoretical calculations based on density functional theory (DFT) and its extensions, including the use of Hubbard-U corrections (DFT + U) and hybrid functionals. Electron energy loss spectra (EELS) were obtained from each oxide using a scanning transmission electron microscope (STEM). The same spectra were computed within the framework of the full-potential linear augmented plane-wave (FLAPW) method. The theoretical and experimental EEL spectra are compared quantitatively using non-linear least squares peak fitting and a cross-correlation approach, with the best level of agreement between experiment and theory being obtained using the DFT + U and hybrid computational approaches.

Aguiar, Jeff; Ramasse, Q. M.; Asta, Mark D.; Browning, Nigel D.

2012-06-27T23:59:59.000Z

391

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

392

Atomic scale electron vortices for nanoresearch  

Science Conference Proceedings (OSTI)

Electron vortex beams were only recently discovered and their potential as a probe for magnetism in materials was shown. Here we demonstrate a method to produce electron vortex beams with a diameter of less than 1.2 Angst . This unique way to prepare free electrons to a state resembling atomic orbitals is fascinating from a fundamental physics point of view and opens the road for magnetic mapping with atomic resolution in an electron microscope.

Verbeeck, J.; Van Tendeloo, G. [EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium); Schattschneider, P.; Loeffler, S. [Institute for Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Wien (Austria); Lazar, S. [FEI Electron Optics, 5600 KA Eindhoven (Netherlands); Canadian Centre for Electron Microscopy and Department of Materials Science and Engineering, McMaster University, Main Street West, Hamilton Ontario, L8S4M1 (Canada); Stoeger-Pollach, M.; Steiger-Thirsfeld, A. [USTEM, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Wien (Austria)

2011-11-14T23:59:59.000Z

393

Inelastic X-ray Scattering Reveals Microscopic Transport Properties...  

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

Inelastic X-ray Scattering Reveals Microscopic Transport Properties of Molten Aluminum Oxide The transport properties of high-temperature oxide melts are of considerable interest...

394

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

395

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

396

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

397

Braking system for use with an arbor of a microscope  

DOE Patents (OSTI)

A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling device causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

Norgren, Duane U. (Orinda, CA)

1984-01-01T23:59:59.000Z

398

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

399

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

400

PROPOSAL FOR CONTINGENT TRANSMISSION PLANS  

E-Print Network (OSTI)

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

unknown authors

2010-01-01T23:59:59.000Z

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

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

402

Energy Transmission and Infrastructure  

SciTech Connect

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

Mathison, Jane

2012-12-31T23:59:59.000Z

403

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

404

Shear Viscosity Coefficient from Microscopic Models  

E-Print Network (OSTI)

The transport coefficient of shear viscosity is studied for a hadron matter through microscopic transport model, the Ultra--relativistic Quantum Molecular Dynamics (UrQMD), using the Green--Kubo formulas. Molecular--dynamical simulations are performed for a system of light mesons in a box with periodic boundary conditions. Starting from an initial state composed of $\\pi, \\eta ,\\omega ,\\rho ,\\phi$ with a uniform phase--space distribution, the evolution takes place through elastic collisions, production and annihilation. The system approaches a stationary state of mesons and their resonances, which is characterized by common temperature. After equilibration, thermodynamic quantities such as the energy density, particle density, and pressure are calculated. From such an equilibrated state the shear viscosity coefficient is calculated from the fluctuations of stress tensor around equilibrium using Green--Kubo relations. We do our simulations here at zero net baryon density so that the equilibration times depend on the energy density. We do not include hadron strings as degrees of freedom so as to maintain detailed balance. Hence we do not get the saturation of temperature but this leads to longer equilibration times.

Azwinndini Muronga

2003-09-22T23:59:59.000Z

405

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

406

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...

407

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

408

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

409

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

410

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

411

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

412

The R-curve response of ceramics with microscopic reinforcements: Reinforcement and additive effects  

SciTech Connect

Using direct observations with the scanning electron and optical microscopes, simultaneous measurements of fracture resistance versus crack length (R-curve behavior) and crack interactions with microstructural features at the crack tip and in its wake were made. Selecting whisker-reinforced aluminas and self-reinforced silicon nitrides, one can examine the effects of systematic modifications of microstructure and composition on the R-curve response and the mechanisms giving rise to it. Specifically, increases in whisker content and size can increase the R-Curve response, even for short crack lengths. In the self-reinforced silicon nitrides, changes in alumina: yttria additive ratios also modify the R-curve. Modeling of the R-curve response allows one to verify toughening mechanisms and, with experimental studies, to optimize the R-curve behavior in ceramics containing microscopic reinforcements, e.g., whiskers and elongated grain structures.

Becher, P.F.; Sun, E.Y.; Plucknett, K,P.; Hsueh, C.H.

1996-05-01T23:59:59.000Z

413

Model Development for Atomic Force Microscope Stage Mechanisms  

E-Print Network (OSTI)

Model Development for Atomic Force Microscope Stage Mechanisms Ralph C. Smith and Andrew G. Hatch of the Philippines Virginia Commonwealth University Diliman, Quezon City 1101 Richmond VA 23284 rcdelros titanate (PZT) devices employed in atomic force microscope stage mechanisms. We focus specifically on PZT

414

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

415

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

416

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

417

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

418

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

419

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...

420

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

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

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

422

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

423

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

424

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

425

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

426

Flexible Transmission in the Smart Grid  

E-Print Network (OSTI)

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

Hedman, Kory Walter

2010-01-01T23:59:59.000Z

427

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

428

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...

429

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...

430

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;

431

DOE Transmission Capacity Report | Department of Energy  

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

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

432

Casablanca Carlos American Electric Power Transmission Owner  

E-Print Network (OSTI)

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

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

2012-01-01T23:59:59.000Z

433

Electric generating or transmission facility: determination of...  

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

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

434

Definition: Deferred Transmission Capacity Investments | Open...  

Open Energy Info (EERE)

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

435

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

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

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

436

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...

437

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...

438

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...

439

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...

440

Interconnection-Wide Transmission Planning Initiative: Topic...  

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

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

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

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

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

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

442

Definition: Firm Transmission Service | Open Energy Information  

Open Energy Info (EERE)

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

443

Definition: Transmission Reliability | Open Energy Information  

Open Energy Info (EERE)

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

444

Definition: Transmission Reliability Margin | Open Energy Information  

Open Energy Info (EERE)

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

445

Definition: Transmission Constraint | Open Energy Information  

Open Energy Info (EERE)

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

446

Estes-Flatiron Transmission Line Rebuild  

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

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

447

Michigan Electric Transmission Company | Open Energy Information  

Open Energy Info (EERE)

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

448

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...

449

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

E-Print Network (OSTI)

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

Freeman, Walter J III

2005-01-01T23:59:59.000Z

450

Definition: Non-Firm Transmission Service | Open Energy Information  

Open Energy Info (EERE)

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

451

Shape Matters in the Case of Cobalt Nanoparticles  

Science Conference Proceedings (OSTI)

... one of nanotechnology's microscopes of choice. After a few minutes' exposure to the illuminating beam of a transmission electron microscope, the ...

2013-07-11T23:59:59.000Z

452

Security Best Practices for the Electronic Transmission of ...  

Science Conference Proceedings (OSTI)

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

2011-09-15T23:59:59.000Z

453

High-voltage DC transmission: a power electronics workhorse  

Science Conference Proceedings (OSTI)

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

N. G. Hingorani

1996-04-01T23:59:59.000Z

454

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

455

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.

456

Microscopic Analysis of Agricultural Products, 4th Edition  

Science Conference Proceedings (OSTI)

Written for both production staff who need advice on specific problems and development personnel who seek directions. Microscopic Analysis of Agricultural Products, 4th Edition Methods and Analyses Methods - Analyses Books Soft Bound Books Methods - An

457

Geometry-driven visualization of microscopic structures in biology  

Science Conference Proceedings (OSTI)

At a microscopic resolution, biological structures are composed of cells, red blood corpuscles (RBCs), cytoplasm and other microstructural components. There is a natural pattern in terms of distribution, arrangement and packing density of these components ...

Kishore Mosaliganti; Raghu Machiraju; Kun Huang; Gustavo Leone

2008-05-01T23:59:59.000Z

458

Multi-transmission-line-beam interactive system  

E-Print Network (OSTI)

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

Alexander Figotin; Guillermo Reyes

2013-04-19T23:59:59.000Z

459

DOE Transmission System Integration Workshop  

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

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

460

Midwest Transmission Workshop III Summary  

DOE Green Energy (OSTI)

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

Kevin Bryan

2003-03-12T23:59:59.000Z

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

Transmission Rights and Market Power James Bushnell  

E-Print Network (OSTI)

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

California at Berkeley. University of

462

Principles for interregional transmission expansion  

Science Conference Proceedings (OSTI)

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

Benjamin, Richard

2007-10-15T23:59:59.000Z

463

Advancements in Nuclear Materials Research at the Idaho National ...  

Science Conference Proceedings (OSTI)

... Atom Probe (LEAP) and Transmission Electron Microscope (TEM) capable of ... Limited Materials Availability: Considering the Importance of Materials Market ...

464

A TEM Study of the Effect of Platinum Group Metals in Advanced ...  

Science Conference Proceedings (OSTI)

base alloys were investigated using a transmission electron microscope (TEM). ... Finally, a mechanism is proposed to explain the correlation between ?/?' ...

465

Aluminum Alloys: Fabrication, Characterization and Applications  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

466

Prediction of Bake Hardenability of Aluminum Alloys Al6110 and ...  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

467

Optimized Heat Treatment Sequence for AA 6061  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

468

Development of Al-Si Alloy by Optimizing Modifiers and Grain Refiners  

Science Conference Proceedings (OSTI)

... Welding of Aluminum Wires for Cables Harnesses in the Automotive Industry ... Transmission Electron Microscopic Investigation of Sensitized Al-5083.

469

Available Technologies: KSpaceNavigator: Software for Controlling ...  

... and simulated diffraction and Kikuchi line patterns, ... Transmission Electron Microscope Phase-contrast Enhancement, IB-2036 Large Scale Batch ...

470

Dynamic deformation behavior of equal channel angular extruded ...  

Science Conference Proceedings (OSTI)

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

471

California/Transmission | Open Energy Information  

Open Energy Info (EERE)

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

472

Perspective: Power Lines and Motor Vehicle Electronics  

Science Conference Proceedings (OSTI)

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

2010-06-06T23:59:59.000Z

473

Transmission System Reliability Performance Metrics Requirements  

Science Conference Proceedings (OSTI)

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

2003-12-12T23:59:59.000Z

474

Transmission System SQRA Assessment Methods  

Science Conference Proceedings (OSTI)

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

2009-07-31T23:59:59.000Z

475

Underground Transmission Systems Reference Book  

Science Conference Proceedings (OSTI)

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

1993-03-01T23:59:59.000Z

476

Power superconducting power transmission cable  

DOE Patents (OSTI)

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

Ashworth, Stephen P. (Cambridge, GB)

2003-01-01T23:59:59.000Z

477

Transmission Access Charge Informational Filing  

E-Print Network (OSTI)

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

unknown authors

2001-01-01T23:59:59.000Z

478

Boundary stabilization of transmission problems  

E-Print Network (OSTI)

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

Fernando Cardoso; Georgi Vodev

2009-10-20T23:59:59.000Z

479

Investigation of Multi-Frequency Power Transmission and System  

E-Print Network (OSTI)

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

Barazarte Conte, Ronald

2011-08-01T23:59:59.000Z

480

Field Guide: Inspection of Transmission Line Grounding Systems  

Science Conference Proceedings (OSTI)

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

2013-11-25T23:59:59.000Z

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

Electron holography  

Science Conference Proceedings (OSTI)

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

2013-01-08T23:59:59.000Z

482

Definition: Network Integration Transmission Service | Open Energy  

Open Energy Info (EERE)

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

483

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

Science Conference Proceedings (OSTI)

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

2012-11-29T23:59:59.000Z

484

NREL: Transmission Grid Integration - Webinars  

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

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

485

DOE Electricity Transmission System Workshop  

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

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

486

transmission | OpenEI Community  

Open Energy Info (EERE)

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

487

Midwest Transmission Workshop II Summary  

DOE Green Energy (OSTI)

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

Kevin Bryan

2002-12-05T23:59:59.000Z

488

Guide for Transmission Line Grounding  

Science Conference Proceedings (OSTI)

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

2007-12-20T23:59:59.000Z

489

High current pulse transmission cable  

DOE Patents (OSTI)

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

Parsons, W.M.

1990-09-28T23:59:59.000Z

490

Flexible and Strategic Transmission Planning  

Science Conference Proceedings (OSTI)

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

2011-12-22T23:59:59.000Z

491

A population global optimization algorithm to solve the image alignment problem in electron crystallography  

Science Conference Proceedings (OSTI)

Knowledge of the structure of biological specimens is critical to understanding their function. Electron crystallography is an electron microscopy (EM) approach that derives the 3D structure of specimens at high-resolution, even at atomic detail. Prior ... Keywords: Electron crystallography, Electron microscope tomography, Evolutionary algorithms, Global optimization, Image alignment, Stochastic optimization

P. M. Ortigosa; J. L. Redondo; I. García; J. J. Fernández

2007-04-01T23:59:59.000Z

492

Coiled transmission line pulse generators  

DOE Patents (OSTI)

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

McDonald, Kenneth Fox (Columbia, MO)

2010-11-09T23:59:59.000Z

493

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

E-Print Network (OSTI)

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

Mills, Andrew; Wiser, Ryan; Porter, Kevin

2007-01-01T23:59:59.000Z

494

Definition: Transmission Service | Open Energy Information  

Open Energy Info (EERE)

Service Service Jump to: navigation, search Dictionary.png Transmission Service Services provided to the Transmission Customer by the Transmission Service Provider to move energy from a Point of Receipt to a Point of Delivery.[1] Related Terms transmission lines, Transmission Customer, Transmission Service Provider, transmission line References ↑ Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Transmission_Service&oldid=480302" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

495

Arizona/Transmission/Summary | Open Energy Information  

Open Energy Info (EERE)

Arizona‎ | Transmission Arizona‎ | Transmission Jump to: navigation, search ArizonaTransmissionHeader.png Roadmap Agency Links Local Regulations State Regulations Summary General Transmission Dashboard Permitting Atlas Compare States Arizona California Colorado Idaho Montana Nevada New Mexico Oregon Utah Washington Wyoming Resource Library NEPA Database Transmission Permitting at a Glance In Arizona, the state has the authority to site high-voltage transmission lines. A public service corporation would need to obtain a Certificate of Environmental Compatibility (CEC) from the Arizona Power Plant and Transmission Line Siting Committee that is "affirmed and approved" by the Arizona Corporation Commission (ACC). State Siting Act Arizona Revised Statute (A.R.S.)§ 40-360 et seq. State Preemptive Authority If the Transmission Line Siting Committee (TLSC) finds that compliance with local ordinances, master plan or regulation is unreasonably restrictive and compliance is not feasible in view of technology available, then the TLSC may grant a certificate.[1]

496

A Computer Package for Transmission Line Analysis  

Science Conference Proceedings (OSTI)

A computer program, LIGNE, has been developed as a comprehensive teaching aid for the section on transmission line theory in an electromagnetics course. The program assists the student in the analysis of transmission lines, enabling him to quickly assess ...

Georges-Andre Chaudron; Manfred Nachman

1987-11-01T23:59:59.000Z

497

Transmission Expansion Planning with Re-design  

E-Print Network (OSTI)

Expanding an electrical transmission network requires heavy investments ... Long term transmission expansion planning determines, over an horizon of 10 or more years, ... generation sites are usually far away from the consumption centers.

498