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Space Charge Waves in Cylindrical Plasma Columns

Trivelpiece, A. W. and Gould, R. W. (1959) Space Charge Waves in Cylindrical Plasma Columns. Journal of Applied Physics, 30 (11). pp. 1784-1793. ISSN 0021-8979.

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When a plasma is of finite transverse cross section, space-charge waves may propagate even in the absence of a drift motion or thermal velocities of the plasma. Some of the properties of these space charge waves have been investigated by regarding the plasma as a dielectric and solving the resulting field equations. The effect of a steady axial magnetic field is considered, but motion of heavy ions and electron temperature effects are neglected. Waves are found to exist at frequencies low compared with the plasma frequency as well as waves with oppositely directed phase and group velocities (backward waves).Many of the features of these waves have been verified experimentally by measuring phase velocity and attenuation of waves along the positive column of a low pressure mercury arc in an axial magnetic field. Measurements of electron density have been made using these waves and the results are compared with those obtained by other methods. An interesting feature of these measurements, of value in plasma diagnostics, is that they can be made with frequencies which are small compared with the plasma frequency.

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Additional Information:© 1959 The American Institute of Physics. (Received February 13, 1959) This work was supported in part by the Office of Naval Research. This paper is based partially on a thesis submitted in June, 1958, by one of the authors, Mr. Trivelpiece, to the California Institute of Technology in partial fulfillment of the requirements for the Ph.D. degree.
Group:Electron Tube and Microwave Laboratory
Funding AgencyGrant Number
Office of Naval Research (ONR)220(13)
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Electron Tube and Microwave Laboratory Technical Report13
Issue or Number:11
Record Number:CaltechAUTHORS:TRIjap59
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1676
Deposited By: Archive Administrator
Deposited On:10 Feb 2006
Last Modified:12 Dec 2019 17:06

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