Radially localized helicon modes in nonuniform plasma
A radial density gradient in an axisymmetric cylindrical plasma column forms a potential well for nonaxisymmetric helicon modes ( m not equal0). This paper presents an analytic description of such modes in the limit of small longitudinal wave numbers. The corresponding mode equation indicates the possibility of efficient resonant absorption of rf power in helicon discharges at unusually low frequencies.
Breizman
BN
Institute for Fusion Studies, The University of Texas, Austin, Texas 78712, USA.
Arefiev
AV