Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current
It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E x B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.
Bibliographic Reference: An article published in: Nuclear Fusion 47 L41-L45 (2007)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1088/0029-5515/47/11/L03
Record Number: 200819684 / Last updated on: 2008-02-15
Original language: en
Available languages: en