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 (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 is approximately 0) is produced by LHCD in a layer close to the ITB radial foot.
Bibliographic Reference: An article published in: Phys. Rev. Lett. 92, 175002 (2004)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1103/PhysRevLett.92.175002
Record Number: 200719151 / Last updated on: 2007-05-21
Original language: en
Available languages: en