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, JET-EFDA collaborators

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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

Keywords

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

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    D'Ippolito, D., Myra, J., Ryan, P., Righi, E., Heikkinen, J., Lamalle, P. U., Noterdaeme, J-M., & JET-EFDA collaborators (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