Author: Daniel A. HermanPublisher:
ISBN:
Category :
Languages : en
Pages : 910
Book Description
The Use of Electrostatic Probes to Characterize the Discharge Plasma Structure and Identify Discharge Cathode Erosion Mechanisms in Ring-cusp Ion Thrusters
Author: Daniel A. HermanApplied Science, Materials Science and Information Technologies in Industry
Author: D.L. LiuPublisher: Trans Tech Publications Ltd
ISBN: 3038263931
Category : Technology & Engineering
Languages : en
Pages : 4700
Book Description
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
A Multiple-cathode, High-power, Rectangular Ion Thruster Discharge Chamber for Increasing Thruster Lifetime
Author: Joshua Lucas RoveyDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 942
Book Description
Journal of Propulsion and Power
Author: Near Discharge Cathode Assembly Plasma Potential Measurements in a 30-CM Nstar Type Ion Engine During Beam Extraction
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781721815036
Category :
Languages : en
Pages : 34
Book Description
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
Author: Dan M. GoebelPublisher: John Wiley & Sons
ISBN: 0470436263
Category : Technology & Engineering
Languages : en
Pages : 528
Book Description
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.
Enhanced Discharge Performance in a Ring Cusp Plasma Source
Author: Mechanisms of Cathode Erosion in Plasma Thrusters
Author: James Edward PolkThe Use of the Double Electrostatic Probe in a Gas Discharge
Author: Harold John HanlinPublisher:
ISBN:
Category : Glow discharges
Languages : en
Pages : 82
Book Description