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Effect Of Secondary Electron Emission On Electron Cross Field Current In Exb Discharges
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Book Synopsis Effect of Secondary Electron Emission on Electron Cross-Field Current in E×B Discharges by :
Download or read book Effect of Secondary Electron Emission on Electron Cross-Field Current in E×B Discharges written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews and discusses recent experimental, theoretical, and numerical studies of plasma-wall interaction in a weakly collisional magnetized plasma bounded with channel walls made from different materials. A lowpressure ExB plasma discharge of the Hall thruster was used to characterize the electron current across the magnetic field and its dependence on the applied voltage and electron-induced secondary electron emission (SEE) from the channel wall. The presence of a depleted, anisotropic electron energy distribution function with beams of secondary electrons was predicted to explain the enhancement of the electron cross-field current observed in experiments. Without the SEE, the electron crossfield transport can be reduced from anomalously high to nearly classical collisional level. The suppression of SEE was achieved using an engineered carbon velvet material for the channel walls. Both theoretically and experimentally, it is shown that the electron emission from the walls can limit the maximum achievable electric field in the magnetized plasma. With nonemitting walls, the maximum electric field in the thruster can approach a fundamental limit for a quasineutral plasma.
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 Physics and Applications of Secondary Electron Emission by : Hajo Bruining
Download or read book Physics and Applications of Secondary Electron Emission written by Hajo Bruining and published by . This book was released on 1954 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Emission from Metals Due to Bombardment of High Speed Positive Ions by : Wilfrid James Jackson
Download or read book Secondary Emission from Metals Due to Bombardment of High Speed Positive Ions written by Wilfrid James Jackson and published by . This book was released on 1926 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Electron Emission Due to Positive Ion Bombardment by : John W. Murdock
Download or read book Secondary Electron Emission Due to Positive Ion Bombardment written by John W. Murdock and published by . This book was released on 1955 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Current Problems Concerning Secondary Electron Emission by : H. Seiler
Download or read book Some Current Problems Concerning Secondary Electron Emission written by H. Seiler and published by . This book was released on 1968 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Space-charge Limitation of Secondary Electron Emission Currents Produced by High Energy Radiations by : Peter D. Gianino
Download or read book Space-charge Limitation of Secondary Electron Emission Currents Produced by High Energy Radiations written by Peter D. Gianino and published by . This book was released on 1970 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Secondary electron emission is an important consideration in radiation hardening of electronics. Basic information on this phenomenon, its influence, and the factors that affect its magnitude are required. Space -charge effects on the low-energy, secondary-electron emission currents flowing within any evacuated, two-electrode, plane-parallel system bombarded by KeV or MeV electrons or photons are treated in this report. The secondary emission from each irradiated electrode is assumed to be representable by a Maxwellian distribution, as is done in thermionic electron emission. This permits the complete analytical solution for the thermionic problem to be carried over in its entirety to the secondary case. The principal objective is to determine the net current density between the electrodes J sub c, given the saturation current density J sub s, or vice-versa, under known geometrical and electrical conditions. It is found that d(2) J sub o, where d is the electrode separation, is a useful parameter for characterizing space-charge effects in a parallel-plate geometry system. Generalized graphs employing this parameter are presented so that the results derived here can be readily applied to cases of interest; they permit the determination of threshold voltage conditions for space-charge limitation and partial retardation effects in a diode configuration. Other graphs show the variation of d(2) J sub c with applied voltage. These theoretical predictions are compared to data derived from some AFCRL experiments, in which foil electrodes of aluminum, tantalum and gold were irradiated by 60Co gamma-rays and 10 MeV electrons. (Author).
Book Synopsis Fundamentals of Electric Propulsion by : Dan M. Goebel
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2023-11-30 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Electric Propulsion Understand the fundamental basis of spaceflight with this cutting-edge guide As spacecraft engineering continues to advance, so too do the propulsion methods by which human beings can seek out the stars. Ion thrusters and Hall thrusters have been the subject of considerable innovation in recent years, and spacecraft propulsion has never been more efficient. For professionals within and adjacent to spacecraft engineering, this is critical knowledge that can alter the future of space flight. Fundamentals of Electric Propulsion offers a thorough grounding in electric propulsion for spacecraft, particularly the features and mechanisms underlying Ion and Hall thrusters. Updated in the light of rapidly expanding knowledge, the second edition of this essential guide detailed coverage of thruster principles, plasma physics, and more. It reflects the historic output of the legendary Jet Propulsion Laboratory and promises to continue as a must-own volume for spacecraft engineering professionals. Readers of the second edition of Fundamentals of Electric Propulsion readers will also find: Extensive updates to chapters covering hollow cathodes and Hall thrusters, based on vigorous recent research New sections covering magnetic shielding, cathode plume instabilities, and more Figures and homework problems in each chapter to facilitate learning and retention Fundamentals of Electric Propulsion is an essential work for spacecraft engineers and researchers working in spacecraft propulsion and related fields, as well as graduate students in electric propulsion, aerospace science, and space science courses.
Book Synopsis Secondary Electron Emission from Copper Surfaces by : Ira Garnett Barber
Download or read book Secondary Electron Emission from Copper Surfaces written by Ira Garnett Barber and published by . This book was released on 1921 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Electron Emission at High Current Densities by : Dietrich Alfred Jenny
Download or read book Secondary Electron Emission at High Current Densities written by Dietrich Alfred Jenny and published by . This book was released on 1951 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 20-23, 2003, Huntsville, Alabama: 03-5150 - 03-5199 by :
Download or read book 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 20-23, 2003, Huntsville, Alabama: 03-5150 - 03-5199 written by and published by . This book was released on 2003 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anomalous Secondary Electron Emission by : Louis Malter
Download or read book Anomalous Secondary Electron Emission written by Louis Malter and published by . This book was released on 1936 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Electron Emission in Ion-atom Collisions by :
Download or read book Secondary Electron Emission in Ion-atom Collisions written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The spatial distributions and correlation of stochastic energy deposition events produced in macromolecular volumes by a radiation field are of increasing importance in understanding radiation effects in biological materials. Studies of radiation action involving cell inactivation and mutation as well as single- and double-strand breaks in DNA indicate that energy deposition in volumes as small as nanometer dimensions may be required for interpretation. Correlation of spatial and temporal energy deposition events may be particularly important where the radiation effects result from pairing of sublesions within a specified volume. These examples demonstrate a clear need for knowledge of the energy concentrations randomly deposited in very small volumes in and near the paths of charged particles. Because direct measurement of energy deposition in such small sites is not technically feasible, it is necessary to develop mathematical models capable of calculating the desired quantities. Realistic computational methods, however, require a comprehensive data base of basic interaction cross sections. This data base must include interaction probabilities for the primary and all secondary radiation products. Of particular interest are the cross sections for the production of secondary electrons in primary ionizing events. In the present work, we will consider the extent to which this data base has developed regarding the interaction of fast charged particles with media of biological interest.
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 . This book was released on 1954 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Phenomenon of Secondary Electron Emission from Solids by : Ernest J. Sternglass
Download or read book On the Phenomenon of Secondary Electron Emission from Solids written by Ernest J. Sternglass and published by . This book was released on 1951 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Secondary Electron Emission on Charging by : M. S. Leung
Download or read book Effects of Secondary Electron Emission on Charging written by M. S. Leung and published by . This book was released on 1976 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Dieter König Publisher :Institute of Electrical & Electronics Engineers(IEEE) ISBN 13 :9780780307629 Total Pages :775 pages Book Rating :4.3/5 (76 download)
Book Synopsis XVth International Symposium on Discharges and Electrical Insulation in Vacuum by : Dieter König
Download or read book XVth International Symposium on Discharges and Electrical Insulation in Vacuum written by Dieter König and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1992 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt:
