Discharge Chamber Plasma Structure Of A 30 Cm Nstar Type Ion Engine

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Discharge Chamber Plasma Structure of a 30-CM Nstar-Type Ion Engine

National Aeronautics and Space Administration (NASA)
Discharge Chamber Plasma Structure of a 30 CM Nstar Type Ion Engine Book PDF

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 36 pages
File Size : 41,6 Mb
Release : 2018-06-24
Category : Electronic
ISBN : 1721815503

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Discharge Chamber Plasma Structure of a 30-CM Nstar-Type Ion Engine by National Aeronautics and Space Administration (NASA) Pdf

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

Introduction to Plasmas and Plasma Dynamics

Thomas M. York,Haibin Tang
Introduction to Plasmas and Plasma Dynamics Book PDF

Author : Thomas M. York,Haibin Tang
Publisher : Academic Press
Page : 362 pages
File Size : 46,5 Mb
Release : 2015-08-04
Category : Science
ISBN : 9780128018002

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Introduction to Plasmas and Plasma Dynamics by Thomas M. York,Haibin Tang Pdf

Introduction to Plasmas and Plasma Dynamics provides an accessible introduction to the understanding of high temperature, ionized gases necessary to conduct research and develop applications related to plasmas. While standard presentations of introductory material emphasize physics and the theoretical basis of the topics, this text acquaints the reader with the context of the basic information and presents the fundamental knowledge required for advanced work or study. The book relates theory to relevant devices and mechanisms, presenting a clear outline of analysis and mathematical detail; it highlights the significance of the concepts with reviews of recent applications and trends in plasma engineering, including topics of plasma formation and magnetic fusion, plasma thrusters and space propulsion. Presents the essential principles of plasma dynamics needed for effective research and development work in plasma applications Emphasizes physical understanding and supporting theoretical foundation with reference to their utilization in devices, mechanisms and phenomena Covers a range of applications, including energy conversion, space propulsion, magnetic fusion, and space physics.

The Use of Electrostatic Probes to Characterize the Discharge Plasma Structure and Identify Discharge Cathode Erosion Mechanisms in Ring-cusp Ion Thrusters

Daniel A. Herman
The Use of Electrostatic Probes to Characterize the Discharge Plasma Structure and Identify Discharge Cathode Erosion Mechanisms in Ring cusp Ion Thrusters Book PDF

Author : Daniel A. Herman
Publisher : Unknown
Page : 910 pages
File Size : 40,9 Mb
Release : 2005
Category : Electronic
ISBN : UOM:39015062469823

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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 by Daniel A. Herman Pdf

Fundamentals of Electric Propulsion

Dan M. Goebel,Ira Katz
Fundamentals of Electric Propulsion Book PDF

Author : Dan M. Goebel,Ira Katz
Publisher : John Wiley & Sons
Page : 528 pages
File Size : 51,8 Mb
Release : 2008-12-22
Category : Technology & Engineering
ISBN : 9780470436264

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Fundamentals of Electric Propulsion by Dan M. Goebel,Ira Katz Pdf

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.

Near Discharge Cathode Assembly Plasma Potential Measurements in a 30-CM Nstar Type Ion Engine During Beam Extraction

National Aeronautics and Space Administration (NASA)
Near Discharge Cathode Assembly Plasma Potential Measurements in a 30 CM Nstar Type Ion Engine During Beam Extraction Book PDF

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 34 pages
File Size : 40,8 Mb
Release : 2018-06-24
Category : Electronic
ISBN : 1721815031

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Near Discharge Cathode Assembly Plasma Potential Measurements in a 30-CM Nstar Type Ion Engine During Beam Extraction by National Aeronautics and Space Administration (NASA) Pdf

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

Journal of Propulsion and Power

Anonim
Journal of Propulsion and Power Book PDF

Author : Anonim
Publisher : Unknown
Page : 822 pages
File Size : 52,8 Mb
Release : 2008
Category : Rocketry
ISBN : UCSD:31822036948941

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Journal of Propulsion and Power by Anonim Pdf

The Physics and Technology of Ion Sources

Ian G. Brown
The Physics and Technology of Ion Sources Book PDF

Author : Ian G. Brown
Publisher : John Wiley & Sons
Page : 396 pages
File Size : 55,5 Mb
Release : 2006-03-06
Category : Science
ISBN : 9783527604548

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The Physics and Technology of Ion Sources by Ian G. Brown Pdf

The first edition of this title has become a well-known reference book on ion sources. The field is evolving constantly and rapidly, calling for a new, up-to-date version of the book. In the second edition of this significant title, editor Ian Brown, himself an authority in the field, compiles yet again articles written by renowned experts covering various aspects of ion source physics and technology. The book contains full chapters on the plasma physics of ion sources, ion beam formation, beam transport, computer modeling, and treats many different specific kinds of ion sources in sufficient detail to serve as a valuable reference text.