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Title: Neoclassical tearing modes in DIII-D and calculations of the stabilizing effects of localized electron cyclotron current drive

Neoclassical tearing modes are found to limit the achievable beta in many high performance discharges in DIII-D. Electron cyclotron current drive within the magnetic islands formed as the tearing mode grows has been proposed as a means of stabilizing these modes or reducing their amplitude, thereby increasing the beta limit by a factor around 1.5. Some experimental success has been obtained previously on Asdex-U. Here the authors examine the parameter range in DIII-C in which this effect can best be studied.
Authors:
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Publication Date:
OSTI Identifier:
354990
Report Number(s):
GA--A23098; CONF-990411--
ON: DE99003186; TRN: AHC29924%%194
DOE Contract Number:
AC03-99ER54463;AC02-76CH03073
Resource Type:
Conference
Resource Relation:
Conference: 13. topical conference on applications of radio frequency power to plasmas, Annapolis, MD (United States), 12-14 Apr 1999; Other Information: PBD: May 1999
Research Org:
General Atomics, San Diego, CA (United States);Princeton Plasma Physics Lab., NJ (United States)
Sponsoring Org:
USDOE Office of Energy Research, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; DOUBLET-3 DEVICE; TEARING INSTABILITY; STABILIZATION; NEOCLASSICAL TRANSPORT THEORY; MAGNETIC ISLANDS; ECR HEATING; NON-INDUCTIVE CURRENT DRIVE; ELECTRIC CURRENTS