Modeling of a lower-hybrid current drive by including spectral broadening induced by parametric instability in tokamak plasmas

By incorporating parametric instabilities of lower hybrid (LH) waves into a ray-tracing Fokker-Planck code, accurate simulations of the LH deposition profiles are provided, which are useful for interpreting the long-lasting internal transport barriers (ITBs) sustained by lower hybrid current drive (...

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Veröffentlicht in:Physical review letters 2004-04, Vol.92 (17), p.175002-175002, Article 175002
Hauptverfasser: Cesario, R, Cardinali, A, Castaldo, C, Paoletti, F, Mazon, D
Format: Artikel
Sprache:eng
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Zusammenfassung:By incorporating parametric instabilities of lower hybrid (LH) waves into a ray-tracing Fokker-Planck code, accurate simulations of the LH deposition profiles are provided, which are useful for interpreting the long-lasting internal transport barriers (ITBs) sustained by lower hybrid current drive (LHCD) on JET (Joint European Torus). Utilizing the new model, the simulation of the q-profile evolution results in agreement with that provided by the motional Stark effect reconstructed equilibria. Low magnetic shear (s approximately equal to 0) is produced by LHCD in a layer close to the ITB radial foot.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.92.175002