Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas

D. A. D'Ippolito; J. R. Myra; P. M. Ryan; E. Righi; J. Heikkinen; P. U. Lamalle; J. M. Noterdaeme

doi:10.1088/0029-5515/42/12/302

Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas

D. A. D'Ippolito, J. R. Myra, P. M. Ryan, E. Righi, J. Heikkinen, P. U. Lamalle, J. M. Noterdaeme

Laboratory for Plasma Physics

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

Abstract

The use of mixed(monopole-dipole)-phasing of a set of ion cyclotron range of frequency antennas is potentially useful to optimize tokamak performance. However, recent mixed-phasing experiments on JET, described here, showed undesirable antenna-plasma interactions under certain circumstances. A possible physical mechanism to explain the experimental results is discussed, namely, rf-driven dc parallel currents flowing between adjacent antennas with different phasings can lead to arcing on the antenna with the largest sheath voltage. Means of controlling the interaction are discussed.

Originalsprache	Englisch
Seiten (von - bis)	1357-1365
Seitenumfang	9
Fachzeitschrift	Nuclear Fusion
Jahrgang	42
Ausgabenummer	12
DOIs	https://doi.org/10.1088/0029-5515/42/12/302
Publikationsstatus	Veröffentlicht - Dez. 2002

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10.1088/0029-5515/42/12/302

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abstract = "The use of mixed(monopole-dipole)-phasing of a set of ion cyclotron range of frequency antennas is potentially useful to optimize tokamak performance. However, recent mixed-phasing experiments on JET, described here, showed undesirable antenna-plasma interactions under certain circumstances. A possible physical mechanism to explain the experimental results is discussed, namely, rf-driven dc parallel currents flowing between adjacent antennas with different phasings can lead to arcing on the antenna with the largest sheath voltage. Means of controlling the interaction are discussed.",

author = "D'Ippolito, {D. A.} and Myra, {J. R.} and Ryan, {P. M.} and E. Righi and J. Heikkinen and Lamalle, {P. U.} and Noterdaeme, {J. M.}",

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AU - D'Ippolito, D. A.

AU - Myra, J. R.

AU - Ryan, P. M.

AU - Righi, E.

AU - Heikkinen, J.

AU - Lamalle, P. U.

AU - Noterdaeme, J. M.

PY - 2002/12

Y1 - 2002/12

N2 - The use of mixed(monopole-dipole)-phasing of a set of ion cyclotron range of frequency antennas is potentially useful to optimize tokamak performance. However, recent mixed-phasing experiments on JET, described here, showed undesirable antenna-plasma interactions under certain circumstances. A possible physical mechanism to explain the experimental results is discussed, namely, rf-driven dc parallel currents flowing between adjacent antennas with different phasings can lead to arcing on the antenna with the largest sheath voltage. Means of controlling the interaction are discussed.

AB - The use of mixed(monopole-dipole)-phasing of a set of ion cyclotron range of frequency antennas is potentially useful to optimize tokamak performance. However, recent mixed-phasing experiments on JET, described here, showed undesirable antenna-plasma interactions under certain circumstances. A possible physical mechanism to explain the experimental results is discussed, namely, rf-driven dc parallel currents flowing between adjacent antennas with different phasings can lead to arcing on the antenna with the largest sheath voltage. Means of controlling the interaction are discussed.

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EP - 1365

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 12

ER -

Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas

Abstract

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