Dispersion relation in plasmas generated by a sheath-helix antenna

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 286
  • Download : 0
A theoretical model of the plasmas generated by a sheath-helix antenna is developed for axisymmetric perturbations. The system configuration consists of a cylindrical plasma column inside a dielectric tube of radius R-c. The eigenvalue equation is obtained and the eigenfunction is identified as the Bessel function J(0)(x) of the first kind of order zero. The radial wave numbers xi and eta for the eigenfunction are described in terms of the rf frequency and plasma density. A full dispersion relation is analytically obtained, including influence of the finite plasma size, antenna effects, the electron inertia, and ion mass contributions. It is shown from the dispersion relation that the radial mode number xi approaches infinity at the lower-hybrid frequency, exhibiting a resonance condition. Meanwhile, the radial wave number eta approaches 3.83/R-c at the lower-hybrid frequency. A cross-sectional view of the light emission in experiment indicates that the helicon-plasma density at the lower-hybrid frequency has a hollow profile. The azimuthal component E-theta(r) of the perturbed electric field observed experimentally is very similar to the theoretical model of J(1)(3.83r/R-c) at the lower-hybrid frequency. The emission peak coincides with the radial location of the strongest electric-field intensity. (C) 2002 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2002-02
Language
English
Article Type
Article
Keywords

LOWER-HYBRID FREQUENCY; GENERALIZED THEORY; WHISTLER WAVES; EXCITATION; ABSORPTION; RESONANCE

Citation

JOURNAL OF APPLIED PHYSICS, v.91, no.3, pp.1031 - 1039

ISSN
0021-8979
URI
http://hdl.handle.net/10203/84001
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0