Near Discharge Cathode Assembly Plasma Potential Measurements In A 30 Cm Nstar Type Ion Engine During Beam Extraction
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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 : 2023-10-25
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 2023-10-25 with Technology & Engineering categories.
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.
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
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.
40th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit July 11 14 2004 Fort Lauderdale Fl 04 3950 04 3999
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Author :
language : en
Publisher:
Release Date : 2004
40th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit July 11 14 2004 Fort Lauderdale Fl 04 3950 04 3999 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Airplanes categories.
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 3650 05 3699
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Author :
language : en
Publisher:
Release Date : 2005
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 3650 05 3699 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Airplanes categories.
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.
39th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit July 20 23 2003 Huntsville Alabama 03 5150 03 5199
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Author :
language : en
Publisher:
Release Date : 2003
39th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit July 20 23 2003 Huntsville Alabama 03 5150 03 5199 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Airplanes categories.
36th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 2000 3800 2000 3849
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Author :
language : en
Publisher:
Release Date : 2000
36th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 2000 3800 2000 3849 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Airplanes categories.
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 4200 05 4249
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Author :
language : en
Publisher:
Release Date : 2005
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 4200 05 4249 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Airplanes categories.