Time-resolved laser-induced fluorescence measurement of ion and neutral dynamics in a Hall thruster during ionization oscillations

Fabris, Andrea Lucca; Young, Christopher V.; Cappelli, Mark A.

doi:10.1063/1.4937272

Title: Time-resolved laser-induced fluorescence measurement of ion and neutral dynamics in a Hall thruster during ionization oscillations

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4937272· OSTI ID:1468469

Fabris, Andrea Lucca ^[1];

^[1]; Cappelli, Mark A. ^[1]

Stanford Plasma Physics Lab., Stanford, CA (United States)

The paper presents spatially and temporally resolved laser-induced fluorescence (LIF) measurements of the xenon ion and neutral velocity distribution functions in a 400 W Hall thruster during natural ionization oscillations at 23 kHz, the so-called “breathing mode.” Strong fluctuations in measured axial ion velocity throughout the discharge current cycle are observed at five spatial locations and the velocity maxima appear in the low current interval. The spatio-temporal evolution of the ion velocity distribution function suggests a propagating acceleration front undergoing periodic motion between the thruster exit plane and ~1 cm downstream into the plume. In conclusion, the ion LIF signal intensity oscillates almost in phase with the discharge current, while the neutral fluorescence signal appears out of phase, indicating alternating intervals of strong and weak ionization.

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Research Organization:: Krell Institute, Ames, IA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FC52-08NA28752

OSTI ID:: 1468469

Alternate ID(s):: OSTI ID: 1229792

Journal Information:: Journal of Applied Physics, Vol. 118, Issue 23; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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References (25)

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Cited By (7)

On limitations of laser-induced fluorescence diagnostics for xenon ion velocity distribution function measurements in Hall thrusters Romadanov, I.; Raitses, Y.; Diallo, A. Physics of Plasmas, Vol. 25, Issue 3 https://doi.org/10.1063/1.5020749	journal	March 2018
Laser-induced fluorescence measurements of acceleration zone scaling in the 12.5 kW HERMeS Hall thruster Chaplin, Vernon H.; Jorns, Benjamin A.; Lopez Ortega, Alejandro Journal of Applied Physics, Vol. 124, Issue 18 https://doi.org/10.1063/1.5040388	journal	November 2018
Ion plume investigation of a Hall effect thruster operating with Xe/N ₂ and Xe/air mixtures Gurciullo, Antonio; Fabris, Andrea Lucca; Cappelli, Mark A. Journal of Physics D: Applied Physics, Vol. 52, Issue 46 https://doi.org/10.1088/1361-6463/ab36c5	journal	September 2019
Test cases for grid-based direct kinetic modeling of plasma flows Hara, Kentaro; Hanquist, Kyle Plasma Sources Science and Technology, Vol. 27, Issue 6 https://doi.org/10.1088/1361-6595/aac6b9	journal	June 2018
Time-resolved laser-induced fluorescence diagnostics for electric propulsion and their application to breathing mode dynamics Young, C. V.; Fabris, A. Lucca; MacDonald-Tenenbaum, N. A. Plasma Sources Science and Technology, Vol. 27, Issue 9 https://doi.org/10.1088/1361-6595/aade42	journal	September 2018
Rotating spoke instabilities in a wall-less Hall thruster: experiments Mazouffre, S.; Grimaud, L.; Tsikata, S. Plasma Sources Science and Technology, Vol. 28, Issue 5 https://doi.org/10.1088/1361-6595/ab07fc	journal	May 2019
An overview of discharge plasma modeling for Hall effect thrusters Hara, Kentaro Plasma Sources Science and Technology, Vol. 28, Issue 4 https://doi.org/10.1088/1361-6595/ab0f70	journal	April 2019

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