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26 April 2024

» pubmed » pmid15169159

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Modeling of a lower-hybrid current drive by including spectral broadening induced by parametric instability in tokamak plasmas
R Cesario ; A Cardinali ; C Castaldo ; F Paoletti ; D Mazon ;
Date:	30 Apr 2004
Journal:	Phys Rev Lett, 92 (17), 175002
Abstract:	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.
Source:	PubMed, pmid15169159
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