Electrostatic plasma instabilities excited by a high‐frequency electric field

Sanmartín Losada, Juan Ramón (1970). Electrostatic plasma instabilities excited by a high‐frequency electric field. "The physics of fluids", v. 13 (n. 6); pp. 1533-1542. ISSN 0031-9171.

Description

Title: Electrostatic plasma instabilities excited by a high‐frequency electric field
Author/s:
  • Sanmartín Losada, Juan Ramón
Item Type: Article
Título de Revista/Publicación: The physics of fluids
Date: 1970
Volume: 13
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The electrostatic plasma waves excited by a uniform, alternating electric field of arbitrary intensity are studied on the basis of the Vlasov equation; their dispersion relation, which involves the determinant of either of two infinite matrices, is derived. For ω0 ≫ ωpi (ω0 being the applied frequency and ωpi the ion plasma frequency) the waves may be classified in two groups, each satisfying a simple condition; this allows writing the dispersion relation in closed form. Both groups coalesce (resonance) if (a) ω0  ≈  ωpe/r (r any integer) and (b) the wavenumber k is small. A nonoscillatory instability is found; its distinction from the DuBois‐Goldman instability and its physical origin are discussed. Conditions for its excitation (in particular, upper limits to ω0,k, and k⋅vE,vE being the field‐induced electron velocity), and simple equations for the growth rate are given off‐resonance and at ω0  ≈  ωpi. The dependence of both threshold and maximum growth rate on various parameters is discussed, and the results are compared with those of Silin and Nishikawa. The threshold at ω0  ≈  ωpi/r,r  ≠  1, is studied.

More information

Item ID: 20417
DC Identifier: http://oa.upm.es/20417/
OAI Identifier: oai:oa.upm.es:20417
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 23 Sep 2013 11:08
Last Modified: 21 Apr 2016 23:12
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