Complete Stabilization of Neoclassical Tearing Modes with Lower Hybrid Current Drive on COMPASS-D

200055 citationsJournal Article

Authors

C. D. Warrick · Culham Science Centre

R. J. Buttery · Culham Science Centre

Geoffrey Cunningham · Culham Centre for Fusion Energy

S.J. Fielding · Culham Centre for Fusion Energy

T. C. Hender · Culham Centre for Fusion Energy

B. Lloyd · Culham Science Centre

A. W. Morris ·

Abstract

Lower hybrid current drive (LHCD) with modest powers ( approximately 10% of the total power input) has been used for the first time to completely stabilize performance limiting neoclassical tearing modes in many COMPASS-D tokamak discharges. The stabilizing effect in these experiments is consistent with a reduction in the free energy available in the current profile to drive tearing modes (i.e., the stability index, delta(')) resulting from favorable current gradients (from the LHCD driven current) around the rational surface.

Topics & Keywords

Magnetic confinement fusion research Ionosphere and magnetosphere dynamics Laser-Plasma Interactions and Diagnostics

UN Sustainable Development Goals

Affordable and clean energy

Publication Details

Published in: Physical Review Letters

Volume 85, Issue 3, pp. 574-577

DOI: 10.1103/physrevlett.85.574

Field-Weighted Citation Impact: 6.49