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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 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: ; ; ; ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 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