title: Radially localized helicon modes in nonuniform plasma
abstract: 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.
authors.affiliation: Institute for Fusion Studies, The University of Texas, Austin, Texas 78712, USA.
authors.initials: BN
authors.lastname: Breizman
authors.initials: AV
authors.lastname: Arefiev