Time-resolved laser-induced fluorescence diagnostics for electric propulsion and their application to breathing mode dynamics

Young, C V, Lucca Fabris, Andrea, MacDonald-Tenenbaum, N A, Hargus, W A and Cappelli, M A (2018) Time-resolved laser-induced fluorescence diagnostics for electric propulsion and their application to breathing mode dynamics Plasma Sources Science and Technology, 27 (9), 094004.

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Abstract

Several techniques have been developed recently for performing time-resolved laser-induced fluorescence (LIF) measurements in oscillating plasmas. One of the primary applications is characterizing plasma fluctuations in devices like Hall thrusters used for space propulsion. Optical measurements such as LIF are nonintrusive and can resolve properties like ion velocity distribution functions with high resolution in velocity and physical space. The goals of this paper are twofold. First, the various methods proposed by the community for introducing time resolution into the standard LIF measurement of electric propulsion devices are reviewed and compared in detail. Second, one of the methods, the sample-hold technique, is enhanced by parallelizing the measurement hardware into several signal processing channels that vastly increases the data acquisition rate. The new system is applied to study the dynamics of ionization and ion acceleration in a commercial BHT-600 Hall thruster undergoing unforced breathing mode oscillations in the 44–49 kHz range. A very detailed experimental picture of the common breathing mode ionization instability emerges, in close agreement with established theory and numerical simulations.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Electronic Engineering > Surrey Space Centre
Authors :	Name Email ORCID Young, C V Lucca Fabris, Andrea a.luccafabris@surrey.ac.uk MacDonald-Tenenbaum, N A Hargus, W A Cappelli, M A
Date :	19 September 2018
DOI :	10.1088/1361-6595/aade42
Copyright Disclaimer :	This is an author-created, un-copyedited version of an article published in Plasma Sources Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6595/aade42
Uncontrolled Keywords :	Time-resolved laser-induced fluorescence; Plasma diagnostics; Electric propulsion; Hall thruster; Breathing mode; Plasma oscillation
Depositing User :	Christine Daoutis
Date Deposited :	10 Jan 2019 11:02
Last Modified :	19 Sep 2019 02:08
URI:	http://epubs.surrey.ac.uk/id/eprint/850110

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