Title :
A TG wave as an instability suppressor in helicon plasmas
Author :
Kim, Sun-Ho ; Hwang, Y.S.
Author_Institution :
Seoul Nat. Univ.
Abstract :
Summary form only given. With increasing external magnetic field, plasma density decreases or saturates at certain critical magnetic field. Drift-wave type instabilities due to density gradient or plasma potential gradient are possible candidates to explain the phenomenon. The threshold magnetic field or frequency is observed to be near lower-hybrid resonance in CMA diagram, and the TG wave disappears beyond the resonance. So, the TG wave may have a potential capability of suppressing the instability in bounded, high-density helicon plasmas as well as heating the plasmas. An additional RF source with different frequency is attempted to stabilize the instability by inducing TG wave. Instabilities and their stabilization in helicon plasmas will be discussed theoretically and experimentally
Keywords :
drift instability; plasma density; plasma drift waves; plasma hybrid waves; plasma radiofrequency heating; plasma sources; CMA diagram; RF source; drift wave; external magnetic field; helicon plasmas; instability suppressor; lower-hybrid resonance; plasma density; plasma heating; plasma potential gradient; Electrostatics; Heating; Magnetic fields; Magnetic resonance; Physics; Plasma density; Plasma sources; Plasma waves; Radio frequency;
Conference_Titel :
Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts. The 33rd IEEE International Conference on
Conference_Location :
Traverse City, MI
Print_ISBN :
1-4244-0125-9
DOI :
10.1109/PLASMA.2006.1707095
