Study of coupling and edge effects during ICRF heating experiments using an electrostatic antenna on textor

R. Koch; P. Descamps; F. Durodie; X. M. Shen; G. van Oost; R. van Nieuwenhove; B. Schweer; Y. T. Lie; K. Matsumoto; R. A. Moyer; S. Shinohara

doi:10.1016/0920-3796(90)90059-F

Study of coupling and edge effects during ICRF heating experiments using an electrostatic antenna on textor

R. Koch
, P. Descamps
, F. Durodie
, X. M. Shen
, G. van Oost
, R. van Nieuwenhove
, B. Schweer
, Y. T. Lie
, K. Matsumoto
, R. A. Moyer
, S. Shinohara

Laboratory for Plasma Physics

Royal Military Academy
FORSCHUNGSZENTRUM JULICH GMBH
Yamagata University
University of California, Los Angeles
University of Tokyo

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

10 Zitate (Scopus)

Abstract

An electrostatic type of antenna has been tried on TEXTOR allowing a maximum of 340 kW to be coupled to the plasma during long pulses (0.5 s). Possibly due to mechanical problems, the voltage stand-off was found to be only half that of the regular fast wave antenna. The coupling capability itself, in terms of power coupled for a given maximum voltage on the antenna, is also a factor of two lower than that of the fast wave antenna. The coupling resistance does not show the (theoretically expected) characteristics of an ion Bernstein wave coupler; first theoretical investigations indicate that this antenna is mainly a fast wave launcher. The edge perturbations caused by this antenna are almost negligible while bulk density increase is observed, leading to the conclusion that the particle confinement time improves during the RF pulse.

Originalsprache	Englisch
Seiten (von - bis)	15-23
Seitenumfang	9
Fachzeitschrift	Fusion Engineering and Design
Jahrgang	12
Ausgabenummer	1-2
DOIs	https://doi.org/10.1016/0920-3796(90)90059-F
Publikationsstatus	Veröffentlicht - 1990

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10.1016/0920-3796(90)90059-F

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title = "Study of coupling and edge effects during ICRF heating experiments using an electrostatic antenna on textor",

abstract = "An electrostatic type of antenna has been tried on TEXTOR allowing a maximum of 340 kW to be coupled to the plasma during long pulses (0.5 s). Possibly due to mechanical problems, the voltage stand-off was found to be only half that of the regular fast wave antenna. The coupling capability itself, in terms of power coupled for a given maximum voltage on the antenna, is also a factor of two lower than that of the fast wave antenna. The coupling resistance does not show the (theoretically expected) characteristics of an ion Bernstein wave coupler; first theoretical investigations indicate that this antenna is mainly a fast wave launcher. The edge perturbations caused by this antenna are almost negligible while bulk density increase is observed, leading to the conclusion that the particle confinement time improves during the RF pulse.",

author = "R. Koch and P. Descamps and F. Durodie and Shen, \{X. M.\} and \{van Oost\}, G. and \{van Nieuwenhove\}, R. and B. Schweer and Lie, \{Y. T.\} and K. Matsumoto and Moyer, \{R. A.\} and S. Shinohara",

year = "1990",

doi = "10.1016/0920-3796(90)90059-F",

language = "English",

volume = "12",

pages = "15--23",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

number = "1-2",

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TY - JOUR

T1 - Study of coupling and edge effects during ICRF heating experiments using an electrostatic antenna on textor

AU - Koch, R.

AU - Descamps, P.

AU - Durodie, F.

AU - Shen, X. M.

AU - van Oost, G.

AU - van Nieuwenhove, R.

AU - Schweer, B.

AU - Lie, Y. T.

AU - Matsumoto, K.

AU - Moyer, R. A.

AU - Shinohara, S.

PY - 1990

Y1 - 1990

N2 - An electrostatic type of antenna has been tried on TEXTOR allowing a maximum of 340 kW to be coupled to the plasma during long pulses (0.5 s). Possibly due to mechanical problems, the voltage stand-off was found to be only half that of the regular fast wave antenna. The coupling capability itself, in terms of power coupled for a given maximum voltage on the antenna, is also a factor of two lower than that of the fast wave antenna. The coupling resistance does not show the (theoretically expected) characteristics of an ion Bernstein wave coupler; first theoretical investigations indicate that this antenna is mainly a fast wave launcher. The edge perturbations caused by this antenna are almost negligible while bulk density increase is observed, leading to the conclusion that the particle confinement time improves during the RF pulse.

AB - An electrostatic type of antenna has been tried on TEXTOR allowing a maximum of 340 kW to be coupled to the plasma during long pulses (0.5 s). Possibly due to mechanical problems, the voltage stand-off was found to be only half that of the regular fast wave antenna. The coupling capability itself, in terms of power coupled for a given maximum voltage on the antenna, is also a factor of two lower than that of the fast wave antenna. The coupling resistance does not show the (theoretically expected) characteristics of an ion Bernstein wave coupler; first theoretical investigations indicate that this antenna is mainly a fast wave launcher. The edge perturbations caused by this antenna are almost negligible while bulk density increase is observed, leading to the conclusion that the particle confinement time improves during the RF pulse.

UR - https://www.scopus.com/pages/publications/14644445551

U2 - 10.1016/0920-3796(90)90059-F

DO - 10.1016/0920-3796(90)90059-F

M3 - Article

AN - SCOPUS:14644445551

SN - 0920-3796

VL - 12

SP - 15

EP - 23

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

IS - 1-2

ER -

Study of coupling and edge effects during ICRF heating experiments using an electrostatic antenna on textor

Abstract

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