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M. Martinez-Sanchez. Noguchi, Reid A. (Reid Andrew), 1975- Massachusetts Institute of Technology. Department of Aeronautics and Astronautics 2005-08-22T18:41:39Z 2005-08-22T18:41:39Z 1999 1999 http://hdl.handle.net/1721.1/9480 43584220 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1999. Includes bibliographical references (p. 129). A one-dimensional, linear perturbation model was formulated to aid in the analysis of the low-frequency (33 kHz), axial oscillation instabilities observed during the operation of Stationary Plasma Thrusters. The first six solutions of this l st order perturbation model were determined by scanning the complex frequency plane and were addressed in this study. Of these modes, two notable patterns of behavior were found and discussed. The first group of modes had waves which translated through the thruster, with a fundamental harmonic of 49.7 kHz. The second group, having a fundamental harmonic of 74.2 kHz, exhibited a sloshing type of behavior and was found to have several characteristics of a predator-prey type cycle. Although all modes were found to be highly damped, contrary to the existence of oscillation instabilities, it is believed that an ionization-acoustic resonance instability could be excited. by Reid A. Noguchi. S.M. 129 p. 5727707 bytes 5727465 bytes application/pdf application/pdf eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Aeronautics and Astronautics Linear 1-D analysis of oscillation instabilities in stationary plasma thrusters Linear one-dimensional analysis of oscillation instabilities in stationary plasma thrusters Thesis application/pdf Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="67e83ed0-3cc2-473b-aab9-36047cd8280f"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Linear 1-D analysis of oscillation instabilities in stationary plasma thrusters</Title> <Subtitle>Linear one-dimensional analysis of oscillation instabilities in stationary plasma thrusters</Subtitle> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>1999</PublicationDate> <Authors> <Author> <DisplayName>Noguchi, Reid A. (Reid Andrew), 1975-</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Aeronautics and Astronautics</Keyword> <Abstract>A one-dimensional, linear perturbation model was formulated to aid in the analysis of the low-frequency (33 kHz), axial oscillation instabilities observed during the operation of Stationary Plasma Thrusters. The first six solutions of this l st order perturbation model were determined by scanning the complex frequency plane and were addressed in this study. Of these modes, two notable patterns of behavior were found and discussed. The first group of modes had waves which translated through the thruster, with a fundamental harmonic of 49.7 kHz. The second group, having a fundamental harmonic of 74.2 kHz, exhibited a sloshing type of behavior and was found to have several characteristics of a predator-prey type cycle. Although all modes were found to be highly damped, contrary to the existence of oscillation instabilities, it is believed that an ionization-acoustic resonance instability could be excited.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>