The Use Of Electrostatic Probes To Characterize The Discharge Plasma Structure And Identify Discharge Cathode Erosion Mechanisms In Ring Cusp Ion Thrusters
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The Use Of Electrostatic Probes To Characterize The Discharge Plasma Structure And Identify Discharge Cathode Erosion Mechanisms In Ring Cusp Ion Thrusters
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Author : Daniel A. Herman
language : en
Publisher:
Release Date : 2005
The Use Of Electrostatic Probes To Characterize The Discharge Plasma Structure And Identify Discharge Cathode Erosion Mechanisms In Ring Cusp Ion Thrusters written by Daniel A. Herman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Applied Science Materials Science And Information Technologies In Industry
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Author : D.L. Liu
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2014-02-06
Applied Science Materials Science And Information Technologies In Industry written by D.L. Liu and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-02-06 with Technology & Engineering categories.
Collection of selected, peer reviewed papers from the 2014 International Conference on Advances in Materials Science and Information Technologies in Industry (AMSITI 2014), January 11-12, 2014, Xian, China. Volume is indexed by Thomson Reuters CPCI-S (WoS). The 1030 papers are grouped as follows: Chapter 1: Materials Science and Processing Technologies; Chapter 2: Information Technologies and Information Processing Algorithms; Chapter 3: Applied Sciences and Engineering Researches
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2006
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Dissertations, Academic categories.
A Multiple Cathode High Power Rectangular Ion Thruster Discharge Chamber For Increasing Thruster Lifetime
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Author : Joshua Lucas Rovey
language : en
Publisher:
Release Date : 2006
A Multiple Cathode High Power Rectangular Ion Thruster Discharge Chamber For Increasing Thruster Lifetime written by Joshua Lucas Rovey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Journal Of Propulsion And Power
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Author :
language : en
Publisher:
Release Date : 2008
Journal Of Propulsion And Power written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Rocketry categories.
Near Discharge Cathode Assembly Plasma Potential Measurements In A 30 Cm Nstar Type Ion Engine During Beam Extraction
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-24
Near Discharge Cathode Assembly Plasma Potential Measurements In A 30 Cm Nstar Type Ion Engine During Beam Extraction written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-24 with categories.
Floating emissive probe plasma potential data are presented over a two-dimensional array of locations in the near Discharge Cathode Assembly (DCA) region of a 30-cm diameter ring-cusp ion thruster. Discharge plasma data are presented with beam extraction at throttling conditions comparable to the NASA TH Levels 8, 12, and 15. The operating conditions of the Extended Life Test (ELT) of the Deep Space One (DS1) flight spare ion engine, where anomalous discharge keeper erosion occurred, were TH 8 and TH 12 consequently they are of specific interest in investigating discharge keeper erosion phenomena. The data do not validate the presence of a potential hill plasma structure downstream of the DCA, which has been proposed as a possible erosion mechanism. The data are comparable in magnitude to data taken by other researchers in ring-cusp electron-bombardment ion thrusters. The plasma potential structures are insensitive to thruster throttling level with a minimum as low as 14 V measured at the DCA exit plane and increasing gradually in the axial direction. A sharp increase in plasma potential to the bulk discharge value of 26 to 28 volts, roughly 10 mm radially from DCA centerline, was observed. Plasma potential measurements indicate a low-potential plume structure that is roughly 20 mm in diameter emanating from the discharge cathode that may be attributed to a free-standing plasma double layer. Herman, Daniel A. and Gallimore, Alec D. Glenn Research Center NASA/CR-2006-213296, AIAA Paper 2004-3958, E-14743
Fundamentals Of Electric Propulsion
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Author : Dan M. Goebel
language : en
Publisher: John Wiley & Sons
Release Date : 2008-12-22
Fundamentals Of Electric Propulsion written by Dan M. Goebel and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-12-22 with Technology & Engineering categories.
Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.
Discharge Chamber Plasma Structure Of A 30 Cm Nstar Type Ion Engine
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-24
Discharge Chamber Plasma Structure Of A 30 Cm Nstar Type Ion Engine written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-24 with categories.
Single Langmuir probe measurements are presented over a two-dimensional array of locations in the near Discharge Cathode Assembly (DCA) region of a 30-cm diameter ring cusp ion thruster over a range of thruster operating conditions encompassing the high-power half of the NASA throttling table. The Langmuir probe data were analyzed with two separate methods. All data were analyzed initially assuming an electron population consisting of Maxwellian electrons only. The on-axis data were then analyzed assuming both Maxwellian and primary electrons. Discharge plasma data taken with beam extraction exhibit a broadening of the higher electron temperature plume boundary compared to similar discharge conditions without beam extraction. The opposite effect is evident with the electron/ion number density as the data without began, extraction appears to be more collimated than the corresponding data with beam extraction. Primary electron energy and number densities are presented for one operating condition giving an order of magnitude of their value and the error associated with this calculation. Herman, Daniel A. and Gallimore, Alec D. Glenn Research Center NASA/CR-2006-213299, AIAA Paper 2004-3794, E-14746
Microwave Discharges
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Author : Carlos M. Ferreira
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-21
Microwave Discharges written by Carlos M. Ferreira and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-21 with Science categories.
Proceedings of a NATO ARW held in Vimeiro, Portugal, May 11-15, 1992
Introduction To Plasma Physics And Controlled Fusion
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Author : Francis F. Chen
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Introduction To Plasma Physics And Controlled Fusion written by Francis F. Chen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.
TO THE SECOND EDITION In the nine years since this book was first written, rapid progress has been made scientifically in nuclear fusion, space physics, and nonlinear plasma theory. At the same time, the energy shortage on the one hand and the exploration of Jupiter and Saturn on the other have increased the national awareness of the important applications of plasma physics to energy production and to the understanding of our space environment. In magnetic confinement fusion, this period has seen the attainment 13 of a Lawson number nTE of 2 x 10 cm -3 sec in the Alcator tokamaks at MIT; neutral-beam heating of the PL T tokamak at Princeton to KTi = 6. 5 keV; increase of average ß to 3%-5% in tokamaks at Oak Ridge and General Atomic; and the stabilization of mirror-confined plasmas at Livermore, together with injection of ion current to near field-reversal conditions in the 2XIIß device. Invention of the tandem mirror has given magnetic confinement a new and exciting dimension. New ideas have emerged, such as the compact torus, surface-field devices, and the EßT mirror-torus hybrid, and some old ideas, such as the stellarator and the reversed-field pinch, have been revived. Radiofrequency heat ing has become a new star with its promise of dc current drive. Perhaps most importantly, great progress has been made in the understanding of the MHD behavior of toroidal plasmas: tearing modes, magnetic Vll Vlll islands, and disruptions.