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

Lodestar Research Corporation
Oak Ridge National Laboratory
EFDA CSU-Garching
European Commission
Helsinki University of Technology
EFDA-CSU
Max-Planck-Institut für Plasmaphysik

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

34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1357-1365
Number of pages	9
Journal	Nuclear Fusion
Volume	42
Issue number	12
DOIs	https://doi.org/10.1088/0029-5515/42/12/302
Publication status	Published - Dec 2002

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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

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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.

UR - https://www.scopus.com/pages/publications/0036918770

U2 - 10.1088/0029-5515/42/12/302

DO - 10.1088/0029-5515/42/12/302

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JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 12

ER -

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

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