Complete stabilization of neoclassical tearing modes with lower hybrid current drive on COMPASS-D

Authors
Warrick, CD Buttery, RJ Cunningham, G Fielding, SJ Hender, TC Lloyd, B Morris, AW O'Brien, MR Pinfold, T Stammers, K Valovic, M Walsh, M Wilson, HR
Citation
Cd. Warrick et al., Complete stabilization of neoclassical tearing modes with lower hybrid current drive on COMPASS-D, PHYS REV L, 85(3), 2000, pp. 574-577
Citations number
22
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
3
Year of publication
2000
Pages
574 - 577
Database
ISI
SICI code
0031-9007(20000717)85:3<574:CSONTM>2.0.ZU;2-4
Abstract
Lower hybrid current drive (LHCD) with modest powers (similar to 10% of the total power input) has been used for the first time to completely stabiliz e 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 t earing modes (i.e., the stability index, Delta') resulting from favorable c urrent gradients (from the LHCD driven current around the rational surface.