High density hydrogen helicon plasma in a non-uniform magnetic field

Yoshitaka Mori; Hieki Nakashima; Frederick W. Baity; Richard H. Goulding; Mark D. Carter; Dennis O. Sparks

doi:10.1088/0963-0252/13/3/009

High density hydrogen helicon plasma in a non-uniform magnetic field

Yoshitaka Mori, Hieki Nakashima, Frederick W. Baity, Richard H. Goulding, Mark D. Carter, Dennis O. Sparks

Fusion Technology

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40 Scopus citations

Abstract

A high density (≃10¹⁹ m^-3) hydrogen plasma has been sustained successfully in axially non-uniform static magnetic field configurations for frequencies both above and below the high density limit of the lower hybrid resonance frequency (LH-HD). Wave field measurements suggest several modes are coupling to generate these helicon plasmas. The dependence of the plasma density on the static magnetic field strength for a fixed geometry can be explained by waves, with wavelength close to the antenna length, that couple to the fundamental radial mode for frequencies below the LH-HD frequency and to the second radial mode for frequencies above the LH-HD frequency.

Original language	English
Pages (from-to)	424-435
Number of pages	12
Journal	Plasma Sources Science and Technology
Volume	13
Issue number	3
DOIs	https://doi.org/10.1088/0963-0252/13/3/009
State	Published - Aug 2004

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abstract = "A high density (≃1019 m-3) hydrogen plasma has been sustained successfully in axially non-uniform static magnetic field configurations for frequencies both above and below the high density limit of the lower hybrid resonance frequency (LH-HD). Wave field measurements suggest several modes are coupling to generate these helicon plasmas. The dependence of the plasma density on the static magnetic field strength for a fixed geometry can be explained by waves, with wavelength close to the antenna length, that couple to the fundamental radial mode for frequencies below the LH-HD frequency and to the second radial mode for frequencies above the LH-HD frequency.",

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AU - Mori, Yoshitaka

AU - Nakashima, Hieki

AU - Baity, Frederick W.

AU - Goulding, Richard H.

AU - Carter, Mark D.

AU - Sparks, Dennis O.

PY - 2004/8

Y1 - 2004/8

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AB - A high density (≃1019 m-3) hydrogen plasma has been sustained successfully in axially non-uniform static magnetic field configurations for frequencies both above and below the high density limit of the lower hybrid resonance frequency (LH-HD). Wave field measurements suggest several modes are coupling to generate these helicon plasmas. The dependence of the plasma density on the static magnetic field strength for a fixed geometry can be explained by waves, with wavelength close to the antenna length, that couple to the fundamental radial mode for frequencies below the LH-HD frequency and to the second radial mode for frequencies above the LH-HD frequency.

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ER -

High density hydrogen helicon plasma in a non-uniform magnetic field

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