title: Evidence for Trivelpiece-Gould modes in a helicon discharge.
abstract: The high ionization efficiency of helicon discharges has been attributed to Landau damping and mode coupling to Trivelpiece-Gould (TG) modes. Though theory predicts the importance of TG modes, they have rarely been seen. Here they were detected directly by measuring their radiofrequency current with a J-dot probe, thus supporting the contention that TG modes play a role in these enigmatic plasma sources.
authors.affiliation: Electrical Engineering Department, University of California, Los Angeles, California 90095-1594, USA.
authors.forename: D D
authors.initials: DD
authors.lastname: Blackwell
authors.forename: T G
authors.initials: TG
authors.lastname: Madziwa
authors.forename: D
authors.initials: D
authors.lastname: Arnush
authors.forename: F F
authors.initials: FF
authors.lastname: Chen