Search for the Frequency Content of Hall Effect Thruster HF Electrostatic Wave with the Hilbert-Huang Method
- Institute of Fundamental Technological Research, Polish Academy of Sciences, SwiePtokrzyska 21, 00049 Warsaw (Poland)
- Laboratoire d'Aerothermique, Centre National de la Recherche Scientifique 1C Avenue de la Recherche Scientifique, 45071 Orleans Cedex 2 (France)
- Laboratoire de Physique des Milieux Ionises et Applications, Universite Henri Poincare, Nancy I, BP 239, 54506 Vandoeuvre-les-Nancy Cedex (France)
Hall Effect Thruster (HET) plasma oscillations are studied. A set of antennas and an electric probe is used to pick-up the signals. All the detectors are located in the thruster channel exit plane, at its outer circumference, close to the zone of maximum magnetic barrier of SPT100-ML device. Each non-stationary signal is expanded into a finite set of intrinsic modes with the use of Empirical Mode Decomposition (EMD) method. Characteristic bands of instantaneous frequency and power are filtered out by means of Hilbert transform. The analysis is applied to signals recorded in different operating conditions of the HET. The HF oscillations in the frequency range of {approx} 1 divide 20 MHz are identified as an electrostatic drift wave propagating along the thruster azimuth. In this band the decrease of discharge voltage results in less defined and broadened frequency spectrum when compared to nominal operating conditions.
- OSTI ID:
- 20797946
- Journal Information:
- AIP Conference Proceedings, Vol. 812, Issue 1; Conference: PLASMA 2005: International conference on research and applications of plasmas; 3. German-Polish conference on plasma diagnostics for fusion and applications; 5. French-Polish seminar on thermal plasma in space and laboratory, Opole-Turawa (Poland), 6-9 Sep 2005; Other Information: DOI: 10.1063/1.2168873; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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