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Fast Optical Emission Spectroscopy f...

Konopliv, Mary,

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Fast Optical Emission Spectroscopy for Studying Plasma Behavior in Hall Thrusters /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Fast Optical Emission Spectroscopy for Studying Plasma Behavior in Hall Thrusters // Mary Konopliv.
作者:	Konopliv, Mary,
面頁冊數:	1 electronic resource (214 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
Contained By:	Dissertations Abstracts International86-06B.
標題:	Aerospace engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31563377
ISBN:	9798346813095

Fast Optical Emission Spectroscopy for Studying Plasma Behavior in Hall Thrusters /
Konopliv, Mary,

Fast Optical Emission Spectroscopy for Studying Plasma Behavior in Hall Thrusters /Mary Konopliv. - 1 electronic resource (214 pages)

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

Fast Optical Emission Spectroscopy (FastOES) is a novel diagnostic utilizing measured emission intensities and collisional-radiative modeling to study electron temperature oscillations in Hall thrusters. Advantages include that it is non-invasive, relatively simple, and has potential as an in-flight diagnostic. This dissertation focuses on electron temperature variations related to the breathing mode, a key Hall thruster oscillation around tens of kHz.Key findings reveal that electron temperature oscillations in a Hall thruster can be significant depending on the operating condition and that they are out of phase with the discharge current. Furthermore, an extension of FastOES is utilized to study the phase relationship between ion and neutral populations, providing experimental evidence of the predator-prey relationship between electrons and neutral atoms theorized to drive the breathing mode.Collisional-radiative models (CRMs) are paired with OES measurements to determine the electron temperature. A CRM for xenon is applied in a unique modeling effort to evaluate the accuracy of laser-induced fluorescence (LIF), another Hall thruster diagnostic used for model calibration. The research also explores other spectroscopy applications for Hall thrusters, including imaging cathode species contributions and OES for other species. Overall, this work underscores the complex interactions between electrons, ions, and neutral species in a plasma, and demonstrates the potential of FastOES in plasma propulsion research.

English

ISBN: 9798346813095Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Plasma behavior

Fast Optical Emission Spectroscopy for Studying Plasma Behavior in Hall Thrusters /
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502 $b Ph.D. $c University of California, Los Angeles $d 2024.
520 $a Fast Optical Emission Spectroscopy (FastOES) is a novel diagnostic utilizing measured emission intensities and collisional-radiative modeling to study electron temperature oscillations in Hall thrusters. Advantages include that it is non-invasive, relatively simple, and has potential as an in-flight diagnostic. This dissertation focuses on electron temperature variations related to the breathing mode, a key Hall thruster oscillation around tens of kHz.Key findings reveal that electron temperature oscillations in a Hall thruster can be significant depending on the operating condition and that they are out of phase with the discharge current. Furthermore, an extension of FastOES is utilized to study the phase relationship between ion and neutral populations, providing experimental evidence of the predator-prey relationship between electrons and neutral atoms theorized to drive the breathing mode.Collisional-radiative models (CRMs) are paired with OES measurements to determine the electron temperature. A CRM for xenon is applied in a unique modeling effort to evaluate the accuracy of laser-induced fluorescence (LIF), another Hall thruster diagnostic used for model calibration. The research also explores other spectroscopy applications for Hall thrusters, including imaging cathode species contributions and OES for other species. Overall, this work underscores the complex interactions between electrons, ions, and neutral species in a plasma, and demonstrates the potential of FastOES in plasma propulsion research.
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650 4 $a Plasma physics. $3 3175417
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653 $a Fast Optical Emission Spectroscopy
653 $a Hall thrusters
653 $a Electron temperature oscillations
653 $a Laser-induced fluorescence
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690 $a 0759
690 $a 0204
710 2 $a University of California, Los Angeles. $b Aerospace Engineering 0279. $e degree granting institution. $3 3830060
720 1 $a Wirz, Richard E. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-06B.
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791 $a Ph.D.
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