Title :
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
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;
Conference_Titel :
Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National
Conference_Location :
Cairo
Print_ISBN :
0-7803-5121-5
DOI :
10.1109/NRSC.1998.711520
