Absolute parametric instability in a nonuniform cylindrical plasma waveguide

Author

Demchenko, V.V. ; El-Shorbagy, Kh.H. ; Khalil, Sh.M. ; Zaki, N.G.

Author_Institution

Dept. of Plasma Phys. & Nucl. Fusion, Atomic Energy Authority, Cairo, Egypt

fYear

1998

fDate

24-26 Feb 1998

Abstract

The paper reports an analysis of the effect of spatial plasma nonuniformity on the parametric instability of electrostatic waves in magnetized cylindrical waveguides subjected to an intense HF electric field. It is shown that allowance for the spatial nonuniformity leads: (1) to localization of an unstable wave in a finite region of the plasma volume, (2) to an increase in the threshold value of the pump wave amplitude above which parametric amplification occurs and (3) to a decrease in the value of the growth rate of the unstable waves

Keywords

circular waveguides; parametric instability; plasma electrostatic waves; plasma filled waveguides; waveguide theory; absolute parametric instability; electrostatic waves; growth rate; intense HF electric field; localization; magnetized cylindrical waveguides; nonuniform cylindrical plasma waveguide; parametric amplification; plasma volume; pump wave amplitude; spatial nonuniformity; spatial plasma nonuniformity; threshold value; unstable wave; unstable waves; Electromagnetic waveguides; Electrooptical waveguides; Fusion reactors; Hafnium; Nonuniform electric fields; Physics; Plasma density; Plasma waves; Poisson equations; Saturation magnetization;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National

Conference_Location

Cairo

Print_ISBN

0-7803-5121-5

Type

conf

DOI

10.1109/NRSC.1998.711520

Filename

711520