title: Modeling of a lower-hybrid current drive by including spectral broadening induced by parametric instability in tokamak plasmas.
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.
authors.affiliation: Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche Frascati c.p. 65, 00044 Frascati, Italy. cesario@frascati.enea.it
authors.forename: R
authors.initials: R
authors.lastname: Cesario
authors.forename: A
authors.initials: A
authors.lastname: Cardinali
authors.forename: C
authors.initials: C
authors.lastname: Castaldo
authors.forename: F
authors.initials: F
authors.lastname: Paoletti
authors.forename: D
authors.initials: D
authors.lastname: Mazon