Helicon normal modes in Proto-MPEX

P. A. Piotrowicz; J. F. Caneses; D. L. Green; R. H. Goulding; C. Lau; J. B.O. Caughman; J. Rapp; D. N. Ruzic

doi:10.1088/1361-6595/aabd62

Helicon normal modes in Proto-MPEX

P. A. Piotrowicz, J. F. Caneses, D. L. Green, R. H. Goulding, C. Lau, J. B.O. Caughman, J. Rapp, D. N. Ruzic

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

Abstract

The Proto-MPEX helicon source has been operating in a high electron density 'helicon-mode'. Establishing plasma densities and magnetic field strengths under the antenna that allow for the formation of normal modes of the fast-wave are believed to be responsible for the 'helicon-mode'. A 2D finite-element full-wave model of the helicon antenna on Proto-MPEX is used to identify the fast-wave normal modes responsible for the steady-state electron density profile produced by the source. We also show through the simulation that in the regions of operation in which core power deposition is maximum the slow-wave does not deposit significant power besides directly under the antenna. In the case of a simulation where a normal mode is not excited significant edge power is deposited in the mirror region.

Original language	English (US)
Article number	055016
Journal	Plasma Sources Science and Technology
Volume	27
Issue number	5
DOIs	https://doi.org/10.1088/1361-6595/aabd62
State	Published - May 22 2018

Keywords

MPEX
deuterium
full wave simulation
helicon source
plasma source
plasma waves

ASJC Scopus subject areas

Condensed Matter Physics

Online availability

10.1088/1361-6595/aabd62

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title = "Helicon normal modes in Proto-MPEX",

abstract = "The Proto-MPEX helicon source has been operating in a high electron density 'helicon-mode'. Establishing plasma densities and magnetic field strengths under the antenna that allow for the formation of normal modes of the fast-wave are believed to be responsible for the 'helicon-mode'. A 2D finite-element full-wave model of the helicon antenna on Proto-MPEX is used to identify the fast-wave normal modes responsible for the steady-state electron density profile produced by the source. We also show through the simulation that in the regions of operation in which core power deposition is maximum the slow-wave does not deposit significant power besides directly under the antenna. In the case of a simulation where a normal mode is not excited significant edge power is deposited in the mirror region.",

keywords = "MPEX, deuterium, full wave simulation, helicon source, plasma source, plasma waves",

author = "Piotrowicz, {P. A.} and Caneses, {J. F.} and Green, {D. L.} and Goulding, {R. H.} and C. Lau and Caughman, {J. B.O.} and J. Rapp and Ruzic, {D. N.}",

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doi = "10.1088/1361-6595/aabd62",

language = "English (US)",

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T1 - Helicon normal modes in Proto-MPEX

AU - Piotrowicz, P. A.

AU - Caneses, J. F.

AU - Green, D. L.

AU - Goulding, R. H.

AU - Lau, C.

AU - Caughman, J. B.O.

AU - Rapp, J.

AU - Ruzic, D. N.

PY - 2018/5/22

Y1 - 2018/5/22

N2 - The Proto-MPEX helicon source has been operating in a high electron density 'helicon-mode'. Establishing plasma densities and magnetic field strengths under the antenna that allow for the formation of normal modes of the fast-wave are believed to be responsible for the 'helicon-mode'. A 2D finite-element full-wave model of the helicon antenna on Proto-MPEX is used to identify the fast-wave normal modes responsible for the steady-state electron density profile produced by the source. We also show through the simulation that in the regions of operation in which core power deposition is maximum the slow-wave does not deposit significant power besides directly under the antenna. In the case of a simulation where a normal mode is not excited significant edge power is deposited in the mirror region.

AB - The Proto-MPEX helicon source has been operating in a high electron density 'helicon-mode'. Establishing plasma densities and magnetic field strengths under the antenna that allow for the formation of normal modes of the fast-wave are believed to be responsible for the 'helicon-mode'. A 2D finite-element full-wave model of the helicon antenna on Proto-MPEX is used to identify the fast-wave normal modes responsible for the steady-state electron density profile produced by the source. We also show through the simulation that in the regions of operation in which core power deposition is maximum the slow-wave does not deposit significant power besides directly under the antenna. In the case of a simulation where a normal mode is not excited significant edge power is deposited in the mirror region.

KW - MPEX

KW - deuterium

KW - full wave simulation

KW - helicon source

KW - plasma source

KW - plasma waves

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JO - Plasma Sources Science and Technology

JF - Plasma Sources Science and Technology

IS - 5

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ER -

Helicon normal modes in Proto-MPEX

Abstract

Keywords

ASJC Scopus subject areas

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