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

21 Scopus citations

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
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

Funding

This material is based upon work supported by the US Department of Energy, Office of Science, Office of Fusion Energy Sciences, under Contract No. DEAC05-00OR22725. * This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). 3 Author to whom any correspondence should be addressed.

Funders	Funder number
U.S. Department of Energy
Office of Science
Fusion Energy Sciences	DEAC05-00OR22725

Keywords

MPEX
deuterium
full wave simulation
helicon source
plasma source
plasma waves

Access to Document

10.1088/1361-6595/aabd62

Cite this

@article{41e4debeb23e4639ac999844cbe8c21f,

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.}",

note = "Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd.",

year = "2018",

month = may,

day = "22",

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

language = "English",

volume = "27",

journal = "Plasma Sources Science and Technology",

issn = "0963-0252",

publisher = "IOP Publishing",

number = "5",

}

TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=85048137054&partnerID=8YFLogxK

U2 - 10.1088/1361-6595/aabd62

DO - 10.1088/1361-6595/aabd62

M3 - Article

AN - SCOPUS:85048137054

SN - 0963-0252

VL - 27

JO - Plasma Sources Science and Technology

JF - Plasma Sources Science and Technology

IS - 5

M1 - 055016

ER -

Helicon normal modes in Proto-MPEX

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this