Focusing magnetic field contribution for helicon plasma on Mini-RFTF

Mori Yoshitaka; Nakashima Hideki; F. W. Baity; R. H. Goulding; M. D. Carter; D. O. Sparks

doi:10.1016/j.tsf.2005.08.063

Focusing magnetic field contribution for helicon plasma on Mini-RFTF

Mori Yoshitaka, Nakashima Hideki, F. W. Baity, R. H. Goulding, M. D. Carter, D. O. Sparks

Fusion Technology

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The Mini-Radio Frequency Test Facility (Mini-RFTF) has contributed to helicon plasma source optimization for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR). In this paper, we report how the source, using hydrogen and helium, can be optimized for non-uniform geometries that are constrained to be suitable for VASIMR. The behavior of the density transition into high-density helicon operation was found to significantly depend on the magnetic field geometry. Operation indicates that a strongly focused magnetic geometry produces a continuously increasing density with increasing net power. For helium operation, mirror confinement effects possibly explain the observed plasma sustainment on upstream and downstream for several magnetic field geometries.

Original language	English
Pages (from-to)	583-587
Number of pages	5
Journal	Thin Solid Films
Volume	506-507
DOIs	https://doi.org/10.1016/j.tsf.2005.08.063
State	Published - May 26 2006

Funding

This research was sponsored by Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DEAC05-00OR22725.

Keywords

Helicon plasma
Helium
Hydrogen
Non-uniformity

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.tsf.2005.08.063

Cite this

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title = "Focusing magnetic field contribution for helicon plasma on Mini-RFTF",

abstract = "The Mini-Radio Frequency Test Facility (Mini-RFTF) has contributed to helicon plasma source optimization for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR). In this paper, we report how the source, using hydrogen and helium, can be optimized for non-uniform geometries that are constrained to be suitable for VASIMR. The behavior of the density transition into high-density helicon operation was found to significantly depend on the magnetic field geometry. Operation indicates that a strongly focused magnetic geometry produces a continuously increasing density with increasing net power. For helium operation, mirror confinement effects possibly explain the observed plasma sustainment on upstream and downstream for several magnetic field geometries.",

keywords = "Helicon plasma, Helium, Hydrogen, Non-uniformity",

author = "Mori Yoshitaka and Nakashima Hideki and Baity, {F. W.} and Goulding, {R. H.} and Carter, {M. D.} and Sparks, {D. O.}",

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doi = "10.1016/j.tsf.2005.08.063",

language = "English",

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journal = "Thin Solid Films",

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T1 - Focusing magnetic field contribution for helicon plasma on Mini-RFTF

AU - Yoshitaka, Mori

AU - Hideki, Nakashima

AU - Baity, F. W.

AU - Goulding, R. H.

AU - Carter, M. D.

AU - Sparks, D. O.

PY - 2006/5/26

Y1 - 2006/5/26

N2 - The Mini-Radio Frequency Test Facility (Mini-RFTF) has contributed to helicon plasma source optimization for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR). In this paper, we report how the source, using hydrogen and helium, can be optimized for non-uniform geometries that are constrained to be suitable for VASIMR. The behavior of the density transition into high-density helicon operation was found to significantly depend on the magnetic field geometry. Operation indicates that a strongly focused magnetic geometry produces a continuously increasing density with increasing net power. For helium operation, mirror confinement effects possibly explain the observed plasma sustainment on upstream and downstream for several magnetic field geometries.

AB - The Mini-Radio Frequency Test Facility (Mini-RFTF) has contributed to helicon plasma source optimization for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR). In this paper, we report how the source, using hydrogen and helium, can be optimized for non-uniform geometries that are constrained to be suitable for VASIMR. The behavior of the density transition into high-density helicon operation was found to significantly depend on the magnetic field geometry. Operation indicates that a strongly focused magnetic geometry produces a continuously increasing density with increasing net power. For helium operation, mirror confinement effects possibly explain the observed plasma sustainment on upstream and downstream for several magnetic field geometries.

KW - Helicon plasma

KW - Helium

KW - Hydrogen

KW - Non-uniformity

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DO - 10.1016/j.tsf.2005.08.063

M3 - Article

AN - SCOPUS:33645212137

SN - 0040-6090

VL - 506-507

SP - 583

EP - 587

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Focusing magnetic field contribution for helicon plasma on Mini-RFTF

Abstract

Funding

Keywords

UN SDGs

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