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Application Of Microfabrication Technology To Thermionic Energy Conversion Progress Report No 5 August 1 1980 October 31 1980
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Book Synopsis Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report No. 5, August 1, 1980-October 31, 1980 by :
Download or read book Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report No. 5, August 1, 1980-October 31, 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable effort was directed toward the fabrication of a micron-spaced thermionic converter. In the process, a new technique has evolved which appears more promising and has been investigated theoretically. In both techniques, electrodes of similar differential thermal expansions are utilized to prevent shear stresses from disrupting the spacing pillars. The newer technique has additional advantages that simplify the fabrication of the diode structure, thus making it more practical. Progress is described.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 1740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report 4, 1 May 1980 to 31 July 1980 by :
Download or read book Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report 4, 1 May 1980 to 31 July 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two applications of microfabrication technology to thermionic converters have been investigated theoretically. The first is a novel method of maintaining micron or submicron spacings over large areas (>1 cm2), using metals of different expansion coefficients to eliminate the shear stresses on the insulating pillars separating the electrodes. The second uses low-voltage field-emission sources to create ions in a large (approx. 1 mm) interelectrode gap for space charge neutralization. The theoretical results for both these approaches are highly encouraging.
Book Synopsis Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report No. 1, 1 May-31 October, 1979 by :
Download or read book Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report No. 1, 1 May-31 October, 1979 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In a theoretical and experimental program to evaluate those areas where three-dimensional microfabrication techniques could be important for improving methods of thermionic energy conversion, effort in the first reporting period has been directed toward a theoretical study of microstructures of electrodes for thermionic energy converters. The properties of a cesiated tungsten thermionic energy converter were analyzed with electrode temperatures compatible with a flame-generated heat source (T/sub c/ = 1650°K and T/sub a/ = 700°K), in order to estimate the efficiency, power production, and appropriate electrode spacing for microfabricated devices. The analysis yielded a maximum efficiency of 16 percent and corresponding electrical power of 11 W/cm2, requiring an emission current of 18 A/cm2. The study revealed that to attain these parameters, electrode spacing must be approximately 1 .mu.m, and that such a close-spaced diode with cesiated tungsten electrodes would operate approximately as a vacuum diode. That is, the principal function of the cesium would be to control the work function of the electrode surfaces. Operating at the point of peak efficiency, little space-charge limitation of the emission and little plasma resistance would be produced, because the atom/atom and electron/atom mean free paths would be larger than the interelectrode space.
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report 2 by :
Download or read book Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report 2 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two diode designs are being studied that require basically different fabrication techniques. The fabrication of electrodes was begun to test the concepts and the feasibility of these designs. This work was done with polished molybdenum electrode surfaces and vapor-deposited alumina insulator structures. Initial results were obtained in the close spacing of molybdenum electrodes with alumina insulators. Spacings were demonstrated with 1/2-inch diameter discs in the range of 3 to 5 .mu.m, using 1-.mu.m thick insulators. The deposition of thin alumina films on a molybdenum substrate was demonstrated, upon which arrays of thin film electrodes about 1/32-inch in diameter were deposited. A second approach uses a thin film as one of the electrodes. An analysis of the thermal and electrical transport properties of 1-.mu.m thick tungsten film shows that edge-connected films about 1 mm square in area could withstand the stresses generated by differential thermal expansion when the film is attached to the opposite electrode by stand-off insulators.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1982-08 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermionic Energy Conversion Research Analysis. Annual Progress Report, October 1, 1974--September 31, 1975 by :
Download or read book Thermionic Energy Conversion Research Analysis. Annual Progress Report, October 1, 1974--September 31, 1975 written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermionic Energy Conversion Research Analysis. Annual Progress Report, October 1, 1976--September 31, 1977 by :
Download or read book Thermionic Energy Conversion Research Analysis. Annual Progress Report, October 1, 1976--September 31, 1977 written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The solution algorithm of the wall-to-wall plasma theory of arc-drop in a thermionic converter is summarized, and results from a sample calculation are presented.
Book Synopsis MIT LMFBR Blanket Research Project. Quarterly Progress Report, October 1, 1980-December 31, 1980 by :
Download or read book MIT LMFBR Blanket Research Project. Quarterly Progress Report, October 1, 1980-December 31, 1980 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Information on heterogeneous assembly evaluation is presented concerning ringed moderator description and flux trap description; cross section generation; ringed moderator results; effects of heterogeneous moderation; sodium void worth breakdown; flux trap configuration; flux trap results; the effects of stoichiometric variation in the moderator; and the effects of lattice representation. Also discussed is the engineering compatibility of heterogeneous assembly designs.
Book Synopsis Midsize Facilities by : National Research Council
Download or read book Midsize Facilities written by National Research Council and published by National Academies Press. This book was released on 2006-04-06 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the instruments now used for materials research are too complex and expensive for individual investigators to own, operate, and maintain them. Consequently, they have become increasingly consolidated into multi-user, small to midsized research facilities, located at many sites around the country. The proliferation of these facilities, however, has drawn calls for a careful assessment of best principles for their operation. With support from the Department of Energy and the National Science Foundation, the NRC carried out a study to characterize and discuss ways to optimize investments in materials research facility infrastructure with attention to midsize facilities. This report provides an assessment of the nature and importance of mid-sized facilities, their capabilities, challenges they face, current investment, and optimizing their effectiveness.
Book Synopsis Manufacturing Techniques for Microfabrication and Nanotechnology by : Marc J. Madou
Download or read book Manufacturing Techniques for Microfabrication and Nanotechnology written by Marc J. Madou and published by CRC Press. This book was released on 2011-06-13 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for science and engineering students, this text focuses on emerging trends in processes for fabricating MEMS and NEMS devices. The book reviews different forms of lithography, subtractive material removal processes, and additive technologies. Both top-down and bottom-up fabrication processes are exhaustively covered and the merits of the different approaches are compared. Students can use this color volume as a guide to help establish the appropriate fabrication technique for any type of micro- or nano-machine.
Book Synopsis Physics and Applications of Secondary Electron Emission by : H. Bruining
Download or read book Physics and Applications of Secondary Electron Emission written by H. Bruining and published by Elsevier. This book was released on 2016-01-11 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics and Applications of Secondary Electron Emission provides a survey of the physics and applications of secondary electron emission. It is part of a series of monographs that aim to report on research carried out in electronics and applied physics. The monographs are written by specialists in their own subjects. Wherever it is practical the monographs will be kept short in length to enable all those interested in electronics to find the essentials necessary for their work in a condensed and concentrated form. The book begins with a discussion of secondary electrons. Separate chapters cover methods for measuring secondary electron emission; numerical results on the secondary electron emission yield of both metals and metal compounds; the influence of externally adsorbed foreign atoms and ions on secondary electron emission; and the mechanism of secondary electron emission. The final three chapters deal with the application side. These include the applications of electron multiplication; the elimination of disturbing effects due to secondary electrons; and ""storage"" devices in which information on electrical charges is written on an insulating surface, often by making use of secondary electron emission.
Book Synopsis Thermoelectric Energy Conversion by : Diana Davila Pineda
Download or read book Thermoelectric Energy Conversion written by Diana Davila Pineda and published by John Wiley & Sons. This book was released on 2017-08-22 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest volume in the well-established AMN series, this ready reference provides an up-to-date, self-contained summary of recent developments in the technologies and systems for thermoelectricity. Following an initial chapter that introduces the fundamentals and principles of thermoelectricity, subsequent chapters discuss the synthesis and integration of various bulk thermoelectric as well as nanostructured materials. The book then goes on to discuss characterization techniques, including various light and mechanic microscopy techniques, while also summarizing applications for thermoelectric materials, such as micro- and nano-thermoelectric generators, wearable electronics and energy conversion devices. The result is a bridge between industry and scientific researchers seeking to develop thermoelectric generators.
Book Synopsis Transmission Electron Microscopy by : C. Barry Carter
Download or read book Transmission Electron Microscopy written by C. Barry Carter and published by Springer. This book was released on 2016-08-24 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is a companion volume to Transmission Electron Microscopy: A Textbook for Materials Science by Williams and Carter. The aim is to extend the discussion of certain topics that are either rapidly changing at this time or that would benefit from more detailed discussion than space allowed in the primary text. World-renowned researchers have contributed chapters in their area of expertise, and the editors have carefully prepared these chapters to provide a uniform tone and treatment for this exciting material. The book features an unparalleled collection of color figures showcasing the quality and variety of chemical data that can be obtained from today’s instruments, as well as key pitfalls to avoid. As with the previous TEM text, each chapter contains two sets of questions, one for self assessment and a second more suitable for homework assignments. Throughout the book, the style follows that of Williams & Carter even when the subject matter becomes challenging—the aim is always to make the topic understandable by first-year graduate students and others who are working in the field of Materials Science Topics covered include sources, in-situ experiments, electron diffraction, Digital Micrograph, waves and holography, focal-series reconstruction and direct methods, STEM and tomography, energy-filtered TEM (EFTEM) imaging, and spectrum imaging. The range and depth of material makes this companion volume essential reading for the budding microscopist and a key reference for practicing researchers using these and related techniques.
Book Synopsis Polymers for Electronic Applications by : J.H. Lai
Download or read book Polymers for Electronic Applications written by J.H. Lai and published by CRC Press. This book was released on 2018-01-18 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: The object of this book is to review and to discuss some important applications of polymers in electronics. The first three chapters discuss the current primary applications of polymers in semiconductor device manufacturing: polymers as resist materials for integrated circuit fabrication, polyimides as electronics packaging materials, and polymers as integrated circuits encapsulates.
Book Synopsis Fundamentals of Semiconductor Manufacturing and Process Control by : Gary S. May
Download or read book Fundamentals of Semiconductor Manufacturing and Process Control written by Gary S. May and published by John Wiley & Sons. This book was released on 2006-05-26 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical guide to semiconductor manufacturing from processcontrol to yield modeling and experimental design Fundamentals of Semiconductor Manufacturing and Process Controlcovers all issues involved in manufacturing microelectronic devicesand circuits, including fabrication sequences, process control,experimental design, process modeling, yield modeling, and CIM/CAMsystems. Readers are introduced to both the theory and practice ofall basic manufacturing concepts. Following an overview of manufacturing and technology, the textexplores process monitoring methods, including those that focus onproduct wafers and those that focus on the equipment used toproduce wafers. Next, the text sets forth some fundamentals ofstatistics and yield modeling, which set the foundation for adetailed discussion of how statistical process control is used toanalyze quality and improve yields. The discussion of statistical experimental design offers readers apowerful approach for systematically varying controllable processconditions and determining their impact on output parameters thatmeasure quality. The authors introduce process modeling concepts,including several advanced process control topics such asrun-by-run, supervisory control, and process and equipmentdiagnosis. Critical coverage includes the following: * Combines process control and semiconductor manufacturing * Unique treatment of system and software technology and managementof overall manufacturing systems * Chapters include case studies, sample problems, and suggestedexercises * Instructor support includes electronic copies of the figures andan instructor's manual Graduate-level students and industrial practitioners will benefitfrom the detailed exami?nation of how electronic materials andsupplies are converted into finished integrated circuits andelectronic products in a high-volume manufacturingenvironment. An Instructor's Manual presenting detailed solutions to all theproblems in the book is available from the Wiley editorialdepartment. An Instructor Support FTP site is also available.
