Observation of the Farley‐Buneman Instability in laboratory plasma | Zendy

John P. I. | Zendy; Saxena Y. C. | Zendy

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Observation of the Farley‐Buneman Instability in laboratory plasma

Author(s) -

John P. I.,

Saxena Y. C.

Publication year - 1975

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl002i006p00251

Subject(s) - instability , physics , plasma , ion , two stream instability , electrojet , electron , atomic physics , equatorial electrojet , plasma instability , plasma oscillation , drift velocity , computational physics , mechanics , magnetic field , quantum mechanics , earth's magnetic field

An experiment simulating certain characteristics of the equatorial electrojet plasma (viz. V e »re V i ≳ ri) is described. High frequency (W ≳ V i > ri) instabilities are observed when electrons stream in the E × B direction past ions with a velocity exceeding the ion acoustic speed. The observed phase velocities and frequencies agree with the results of the Farley‐Buneman instability theory, modified to take account of finite k ∥ . The measured instability spectrum for potential fluctuations goes as k −n ⊥ with n = 2–3.5

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