Filaments as the origin of HHFW losses in NSTX

W. Tierens; R. Bilato; N. Bertelli; S. Shiraiwa; J. Myra; L. Colas

doi:10.1063/5.0162406

Filaments as the origin of HHFW losses in NSTX

W. Tierens, R. Bilato, N. Bertelli, S. Shiraiwa, J. Myra, L. Colas

PPPL NSTX

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

In this work we discuss a recent explanation for the observed edge losses during High Harmonic Fast Wave (HHFW) heating and current drive in NSTX. According to our explanation, the edge losses are due to the resonant excitation of surface waves which flow in the parallel direction along naturally occurring density filaments in the edge plasma. Going beyond the approximations of earlier work [1], we discuss additional complexities which arise in a full-wave description of the surface wave dispersion relation, and the possible, if in our opinion unlikely, relevance of this loss mechanism outside of the HHFW regime.

Original language	English (US)
Article number	030006
Journal	AIP Conference Proceedings
Volume	2984
Issue number	1
DOIs	https://doi.org/10.1063/5.0162406
State	Published - Aug 18 2023
Event	24th Topical Conference on Radio-frequency Power in Plasmas - Annapolis, United States Duration: Sep 26 2022 → Sep 28 2022

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/5.0162406

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title = "Filaments as the origin of HHFW losses in NSTX",

abstract = "In this work we discuss a recent explanation for the observed edge losses during High Harmonic Fast Wave (HHFW) heating and current drive in NSTX. According to our explanation, the edge losses are due to the resonant excitation of surface waves which flow in the parallel direction along naturally occurring density filaments in the edge plasma. Going beyond the approximations of earlier work [1], we discuss additional complexities which arise in a full-wave description of the surface wave dispersion relation, and the possible, if in our opinion unlikely, relevance of this loss mechanism outside of the HHFW regime.",

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T1 - Filaments as the origin of HHFW losses in NSTX

AU - Tierens, W.

AU - Bilato, R.

AU - Bertelli, N.

AU - Shiraiwa, S.

AU - Myra, J.

AU - Colas, L.

PY - 2023/8/18

Y1 - 2023/8/18

N2 - In this work we discuss a recent explanation for the observed edge losses during High Harmonic Fast Wave (HHFW) heating and current drive in NSTX. According to our explanation, the edge losses are due to the resonant excitation of surface waves which flow in the parallel direction along naturally occurring density filaments in the edge plasma. Going beyond the approximations of earlier work [1], we discuss additional complexities which arise in a full-wave description of the surface wave dispersion relation, and the possible, if in our opinion unlikely, relevance of this loss mechanism outside of the HHFW regime.

AB - In this work we discuss a recent explanation for the observed edge losses during High Harmonic Fast Wave (HHFW) heating and current drive in NSTX. According to our explanation, the edge losses are due to the resonant excitation of surface waves which flow in the parallel direction along naturally occurring density filaments in the edge plasma. Going beyond the approximations of earlier work [1], we discuss additional complexities which arise in a full-wave description of the surface wave dispersion relation, and the possible, if in our opinion unlikely, relevance of this loss mechanism outside of the HHFW regime.

UR - https://www.scopus.com/pages/publications/85177080472

UR - https://www.scopus.com/inward/citedby.url?scp=85177080472&partnerID=8YFLogxK

U2 - 10.1063/5.0162406

DO - 10.1063/5.0162406

M3 - Conference article

AN - SCOPUS:85177080472

SN - 0094-243X

VL - 2984

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

IS - 1

M1 - 030006

T2 - 24th Topical Conference on Radio-frequency Power in Plasmas

Y2 - 26 September 2022 through 28 September 2022

ER -

Filaments as the origin of HHFW losses in NSTX

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