Generation of Localized Lower-Hybrid Current Drive By Temperature Perturbations

Abstract

Despite high demonstrated efficiency, lower-hybrid current drive (LHCD) has not been considered localized enough for neoclassical tearing mode (NTM) stabilization in tokamaks. This assessment must be reconsidered in view of the RF current condensation effect. We show that an island with a central hot spot induces significant localization of LHCD. Furthermore, in steady state tokamaks where a significant amount of current is provided by LHCD, passive stabilization of NTMs may occur automatically, particularly as islands become large, without requiring precise aiming of the wave power.

26 pages, 6 figures, pre-print

References in corpus (2)

• Suppression of Tearing Modes by RF Current Condensation
• Pulsed RF Schemes for Tearing Mode Stabilization

Cited by in corpus (5)

• Radiative pulsed L-mode operation in ARC-class reactors
• Disruption Avoidance via RF Current Condensation in Magnetic Islands Produced by Off-Normal Events
• An Assessment Of Full-Wave Effects On Maxwellian Lower-Hybrid Wave Damping
• Two-fluid model of rf current condensation in magnetic islands
• On the merit of hot ion mode for tearing mode stabilization