Dispersion relation for electron waves propagating in an isotropic plasma containing Maxwellian and suprathermal electrons
Data(s) |
1975
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Resumo |
The paper discusses the dispersion relation for longitudinal electron waves propagating in a collisionless, homogeneous isotropic plasma, which contains both Maxwellian and suprathermal electrons. I t is found that the dispersion curve, known to have two separate branches for zero suprathermal energy spread,depends sensitively on this quantity. As the energy half-width of the suprathermal population increases, the branches approach each other until they touch at a connexion point, for a small critical value of that half-width. The topology of the dispersion curves is different for half-widths above and below critical; and this can affect the use of wave-propagation measurements as a diagnostic technique for the determination of the electron distribution function. Both the distance between the branches and spatial damping near the connexion frequency depend on the half-width, if below critical, and can be used to determine it. The theory is applied to experimental data. |
Formato |
application/pdf |
Identificador | |
Idioma(s) |
eng |
Publicador |
E.T.S.I. Aeronáuticos (UPM) |
Relação |
http://oa.upm.es/21324/1/A11.pdf http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=4736800 info:eu-repo/semantics/altIdentifier/doi/10.1017/S0022377800025484 |
Direitos |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess |
Fonte |
Journal of Plasma Physcis, ISSN 022-3778, 1975, Vol. 14, No. 1 |
Palavras-Chave | #Aeronáutica #Física |
Tipo |
info:eu-repo/semantics/article Artículo NonPeerReviewed |