Large-scale azimuthal structures in Hall-type plasma discharges

An explanation of large-scale low-frequency oscillations observed by means of a high-speed camera in different Hall-type plasma devices (magnetrons, Penning discharges, Hall thrusters, etc.) is proposed. They can be interpreted as the beating between high-frequency eigenmodes of gradient drift instability occurring in spatially bounded nonuniform plasmas. The resemblance of the experimental data obtained with the finite exposure time and the calculated characteristics of high-frequency modes beating is highlighted. The main results are obtained analytically in a magnetron-like configuration with the axial magnetic field and the radial electric field. © 2019 Author(s).

Authors
Marusov N.A. 1, 2, 3 , Sorokina E.A. 2, 3 , Ilgisonis V.I. 3, 4 , Lakhin V.P. 2, 3
Journal
Physics of Plasmas
Number of issue
9
Language
English
Status
Published
Link
External link
DOI
10.1063/1.5111948
Number
090701
Volume
26
Year
2019
Organizations
  • 1 Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, 141701, Russian Federation
  • 2 NRC Kurchatov Institute, 1 Kurchatov Sq., Moscow, 123182, Russian Federation
  • 3 Peoples' Friendship University of Russia, RUDN University, 3 Ordzhonikidze St., Moscow, 117198, Russian Federation
  • 4 State Atomic Energy Corporation ROSATOM, 24 Bolshaya Ordynka St., Moscow, 119017, Russian Federation
Keywords
High speed cameras; Magnetrons; Plasma diagnostics; Plasma stability; Axial magnetic field; Azimuthal structures; Gradient-drift instability; High-frequency mode; Low frequency oscillations; Nonuniform plasma; Penning discharge; Radial electric field; Electric discharges
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