title: ArI/ArII laser induced fluorescence system for measurement of neutral and ion dynamics in a large scale helicon plasma.
abstract: In order to investigate the role of both neutral and ion dynamics in large-scale helicon discharges, a laser induced fluorescence (LIF) system capable of measuring both ArI and ArII fluorescence using a single tunable laser is being developed. The system is based on a >250 mW solid state laser. For ArI measurements, the laser pumps the metastable (2P03/2)4s level to the (2P01/2)4p level using 696.7352 nm light, and fluorescence radiation from decay to the (2P01/2)4s level at 772.6333 nm is observed. For ArII, currently in development, the metastable (3P)3d4F7/2level will be pumped to the (3P)4p4D07/2level using 688.8511 nm, and decay fluorescence to the (3P)4s4P5/2level at 434.9285 nm measured. Here all wavelengths are in a vacuum.
authors.affiliation: University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: R F
authors.initials: RF
authors.lastname: Kelly
authors.affiliation: University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: K D
authors.initials: KD
authors.lastname: Meaney
authors.affiliation: University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: M
authors.initials: M
authors.lastname: Gilmore
authors.affiliation: University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Desjardins
authors.affiliation: University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang