Spectral analysis of Hall-effect thruster plasma oscillations based on the empirical mode decomposition

Journal Article · Thu Dec 15 00:00:00 EST 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2145020· OSTI ID:20782414

Kurzyna, J; Mazouffre, S; Lazurenko, A; Albarede, L; Bonhomme, G; Makowski, K; Dudeck, M; Peradzynski, Z ^[1]

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1. Institute of Fundamental Technological Research, Polish Academy of Sciences, Swietokrzyska 21, 00049 Warsaw (Poland)

Hall-effect thruster plasma oscillations recorded by means of probes located at the channel exit are analyzed using the empirical mode decomposition (EMD) method. This self-adaptive technique permits to decompose a nonstationary signal into a set of intrinsic modes, and acts as a very efficient filter allowing to separate contributions of different underlying physical mechanisms. Applying the Hilbert transform to the whole set of modes allows to identify peculiar events and to assign them a range of instantaneous frequency and power. In addition to 25 kHz breathing-type oscillations which are unambiguously identified, the EMD approach confirms the existence of oscillations with instantaneous frequencies in the range of 100-500 kHz typical for ion transit-time oscillations. Modeling of high-frequency modes ({nu}{approx}10 MHz) resulting from EMD of measured wave forms supports the idea that high-frequency plasma oscillations originate from electron-density perturbations propagating azimuthally with the electron drift velocity.

• OSTI ID: 20782414
• Journal Information: Physics of Plasmas, Vol. 12, Issue 12; Other Information: DOI: 10.1063/1.2145020; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED-PARTICLE TRANSPORT
COMPUTERIZED SIMULATION
DISTURBANCES
ELECTRON DENSITY
ELECTRON DRIFT
FILTERS
HALL EFFECT
IONS
KHZ RANGE
MAGNETOHYDRODYNAMICS
MHZ RANGE
OSCILLATIONS
PLASMA
PLASMA DENSITY
PLASMA GUNS
PLASMA INSTABILITY
PLASMA SIMULATION
PLASMA WAVES
THRUSTERS
WAVE FORMS