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Propagation and mode conversion of lower-hybrid waves generated by a finite source

Bellan, P. M. and Porkolab, M. (1974) Propagation and mode conversion of lower-hybrid waves generated by a finite source. Physics of Fluids, 17 (8). pp. 1592-1601. ISSN 0031-9171. http://resolver.caltech.edu/CaltechAUTHORS:BELpof74

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Abstract

The propagation of electrostatic plasma waves, and their subsequent conversion into hot plasma waves at the lower hybrid frequency is calculated for realistic density profiles and finite rf sources in a slab geometry. A finite length slow wave source having a potential distribution phi ~ cosk0z is found to generate spatial oscillations having a well-defined wavelength. These oscillations are confined to regions bounded by conical curves originating at the ends of the source. The axial distance of rf energy propagation to the lower hybrid layer is found to be greater than the radial distance of propagation by a factor of the order (mi/me)1/2. The conversion at the lower hybrid layer of the electrostatic cold plasma waves excited by a finite source into propagating hot plasma waves is calculated. It is shown that collisional damping at the lower hybrid layer may predominate over mode conversion even for relatively low collision frequencies.


Item Type:Article
Additional Information:©1974 American Institute of Physics. (Received 4 February 1974) One of the authors (P.B.) wishers to thank both Dr. M.N. Rosenbluth for discussions concerning the caluclations of the collisional effects and Dr. M.D. Kruskal for discussions concerning the path deformation argument of the mode conversion calculation. This work was supported by the U.S. Atomic Energy Commission Contract AT(11-1)-3073. One of the authors (P.B.) received financial support from the National Research Council of Canada in the form of a Post Graduate Fellowship. P.M. Bellan and M. Porkolab, Reply to Comments by Krapchev and Bers, Physics of Fluids, 21(11):2124-2125, November 1978.
Record Number:CaltechAUTHORS:BELpof74
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BELpof74
Alternative URL:http://dx.doi.org/10.1063/1.1694938
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9344
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:14 Dec 2007
Last Modified:26 Dec 2012 09:47

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