title: RF absorption and ion heating in helicon sources.
abstract: Experimental data are presented that are consistent with the hypothesis that anomalous rf absorption in helicon sources is due to electron scattering arising from parametrically driven ion-acoustic waves downstream from the antenna. Also presented are ion temperature measurements demonstrating anisotropic heating (T( perpendicular)>T(parallel)) at the edge of the discharge. The most likely explanation is ion-Landau damping of electrostatic slow waves at a local lower-hybrid-frequency resonance.
authors: Department of Physics, West Virginia University, Morgantown, West Virginia 26505, USA.
authors: J L
authors: JL
authors: Kline
authors: E E
authors: EE
authors: Scime
authors: R F
authors: RF
authors: Boivin
authors: A M
authors: AM
authors: Keesee
authors: X
authors: X
authors: Sun
authors: V S
authors: VS
authors: Mikhailenko