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

D. D`Ippolito, J. Myra, P. Ryan, E. Righi, Jukka Heikkinen, P.U. Lamalle, J.-M. Noterdaeme

Research output: Contribution to journalArticleScientificpeer-review

28 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 languageEnglish
Pages (from-to)1357-1365
JournalNuclear Fusion
Volume42
Issue number12
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

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plasma interactions
antennas
sheaths
cyclotrons
interactions
electric potential
ions

Keywords

  • JET
  • plasma
  • Tokamak
  • fusion energy
  • fusion reactors
  • antennas

Cite this

D`Ippolito, D., Myra, J., Ryan, P., Righi, E., Heikkinen, J., Lamalle, P. U., & Noterdaeme, J-M. (2002). Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas. Nuclear Fusion, 42(12), 1357-1365. https://doi.org/10.1088/0029-5515/42/12/302
D`Ippolito, D. ; Myra, J. ; Ryan, P. ; Righi, E. ; Heikkinen, Jukka ; Lamalle, P.U. ; Noterdaeme, J.-M. / Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas. In: Nuclear Fusion. 2002 ; Vol. 42, No. 12. pp. 1357-1365.
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D`Ippolito, D, Myra, J, Ryan, P, Righi, E, Heikkinen, J, Lamalle, PU & Noterdaeme, J-M 2002, 'Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas', Nuclear Fusion, vol. 42, no. 12, pp. 1357-1365. https://doi.org/10.1088/0029-5515/42/12/302

Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas. / D`Ippolito, D.; Myra, J.; Ryan, P.; Righi, E.; Heikkinen, Jukka; Lamalle, P.U.; Noterdaeme, J.-M.

In: Nuclear Fusion, Vol. 42, No. 12, 2002, p. 1357-1365.

Research output: Contribution to journalArticleScientificpeer-review

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AU - D`Ippolito, D.

AU - Myra, J.

AU - Ryan, P.

AU - Righi, E.

AU - Heikkinen, Jukka

AU - Lamalle, P.U.

AU - Noterdaeme, J.-M.

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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.

KW - JET

KW - plasma

KW - Tokamak

KW - fusion energy

KW - fusion reactors

KW - antennas

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

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SP - 1357

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JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

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D`Ippolito D, Myra J, Ryan P, Righi E, Heikkinen J, Lamalle PU et al. Modelling of mixed-phasing antenna-plasma interactions on JET A2 antennas. Nuclear Fusion. 2002;42(12):1357-1365. https://doi.org/10.1088/0029-5515/42/12/302