SPECTRUM OF LOW FREQUENCY, NON-AXISYMMETRIC OSCILLATIONS IN A COLD, CURRENT CARRYING PLASMA COLUMN
The spectrum of low frequency, m = +- 1 oscillations in a cold, collisionless, cylindrical plasma comprises the frequencies of the lowest radial eigenmodes and the surface modes of the fast magnetosonic wave, all the global eigenmodes of the Alfven wave (ion - cyclotron wave), and the Alfven continuum. The spectrum of a homogeneous, currentless plasma cylinder is obtained from an analytical dispersions relation. This spectrum is compared with numerically obtained spectra of non-uniform plasmas with and without axial current. The connection of the magnetohydrodynamic (MHD) kink and international kink instabilities with the global eigenmodes of the the Alfven wave is evidenced. Among all the modes of the magnetosonic wave which have frequencies in the Alfven continuum, the (m-chi -1,k<O)-surface mode is the best candidate for antenna - plasma coupling because its conversion layer is located well into the plasma interior.
Bibliographic Reference: PHYSICS OF FLUIDS, VOL. 27 (1984), NO. 2, PP. 432-437
Record Number: 1989122085500 / Last updated on: 1987-01-01
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