Plasma edge density and lower hybrid current drive in JET (Joint European Torus)

R. Cesario, L. Amicucci, C. Castaldo, M. Kempenaars, S. Jachmich, J. Mailloux, O. Tudisco, A. Galli, A. Krivska

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Abstract

Externally launched lower hybrid (LH) waves do not propagate into the plasma core during operations of JET with radial profiles with relatively high density even at the periphery, approaching the condition necessary for ITER. Modelling results indicate that this problem would be caused by parametric instability (PI)-induced LH spectral broadening, which is expected to occur in the plasma edge and prevents the coupled LH power penetrating the plasma core. However, operation with relatively high electron temperature at the edge is expected to diminish the PI effect and extend the LH current drive effectiveness to reactor-grade high density plasmas, consistent with results obtained in other experiments. © 2011 IOP Publishing Ltd.
Original languageEnglish
Article number085011
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number8
DOIs
Publication statusPublished - Aug 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Cesario, R., Amicucci, L., Castaldo, C., Kempenaars, M., Jachmich, S., Mailloux, J., ... Krivska, A. (2011). Plasma edge density and lower hybrid current drive in JET (Joint European Torus). Plasma Physics and Controlled Fusion, 53(8), -. [085011]. https://doi.org/10.1088/0741-3335/53/8/085011