NDLI: Radial profiles of neutral argon in a helicon source

Content Provider	IEEE Xplore Digital Library
Author	Keesee, A.M. Scime, E.E.
Copyright Year	2004
Description	Author affiliation: West Virginia Univ., Morgantown, WV, USA (Keesee, A.M.; Scime, E.E.)
Abstract	Summary form only given. Ion-neutral and electron-neutral collisions can be important mechanisms for Alfven wave damping, ion cyclotron wave damping, and flow thermalization in helicon sources. The phenomenon of neutral pumping, leading to reduced neutral pressures on axis, has been suggested to play an important role in the physics of cylindrically symmetric helicon sources. However, the spatial distribution, temperature, and flow of neutral atoms in helicon sources are poorly understood quantities. We have obtained laser induced fluorescence (LIF) measurements of argon neutrals, helium neutrals, and argon ions as a function of radial position with a low power, tunable diode laser in the Hot hELIcon eXperiment (HELIX) at West Virginia University. Using radial profile measurements of electron density and electron temperature, the neutral (or ion) density profile can be extracted from spatially resolved LIF measurements of the interrogated species. LIF neutral density profiles are compared to neutral density profile measurements obtained through spatially resolved, passive emission spectroscopy measurements.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	71167
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1340160
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Argon Density measurement Damping Electrons Spatial resolution Cyclotrons Physics Temperature distribution Atomic beams Atomic measurements
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Condensed Matter Physics Atomic and Molecular Physics, and Optics

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