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Surface instability of a current-carrying plasma under the influence of a high-frequency electric-field

Gopalswamy, N and Krishan, S (1982) Surface instability of a current-carrying plasma under the influence of a high-frequency electric-field. In: Pramana, 18 (6). pp. 473-484.

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Surface instability of a collisionless semi-infinite current carrying plasma is studied. The semi-infinite plasma bounded by a plane surface is under the influence of a high frequency (hf) field. There are two classes of surface modes. One is a normal extension of zero high frequency field and the other due entirely to the presence ofhf field. As expected, with the increase in thehf field, the growth rates of the surface instabilities decrease. There are regions defined by the electron drift velocityu where the unstable surface and bulk regions overlap. The interesting result is that unlike the bulk plasma, there is a stable region on theu-axis flanked by two unstable regions. The width of this stable region increases with the increase in the field strength.

Item Type: Journal Article
Publication: Pramana
Publisher: Springer India, in co-publication with Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Springer.
Keywords: Surface instability - surface modes - bulk modes, stable region - external high frequency field - growth rate - two-stream instability
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 Dec 2009 07:23
Last Modified: 19 Sep 2010 05:43
URI: http://eprints.iisc.ac.in/id/eprint/22882

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