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Title: OBSERVATION OF SUPRATHERMAL ELECTRONS DURING MAGNETIC RECONNECTION AT THE SAWTOOTH INSTABILITY IN DIII-D TOKAMAK

OAK A271 OBSERVATION OF SUPRATHERMAL ELECTRONS DURING MAGNETIC RECONNECTION AT THE SAWTOOTH INSTABILITY IN DIII-D TOKAMAK. Intense bursts of x-ray and electron cyclotron emission are observed during sawtooth instabilities in high-temperature plasmas in the DIII-D tokamak. The bursts are initiated around the X-point of the m = 1, n = 1 magnetic island at the beginning of the sawtooth crash and are displaced to larger radii later during the temperature collapse. Reconstruction of the magnetic configuration using motional Stark effect (MSE) data and numerical simulations indicates that the bursts can be connected with suprathermal electrons (E{sub r} {approx} 30-40 keV) generated during reconnection of the magnetic field around the q = 1 surface.
Authors:
;
Publication Date:
OSTI Identifier:
813678
DOE Contract Number:
AC03-99ER54463
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: THIS IS A PREPRINT OF A PAPER TO BE SUBMITTED FOR PUBLICATION IN PHYS. REV. LETT.; PBD: 1 Nov 2002
Research Org:
GENERAL ATOMICS (US)
Sponsoring Org:
(US)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CONFIGURATION; CYCLOTRONS; DOUBLET-3 DEVICE; ELECTRONS; INSTABILITY; MAGNETIC FIELDS; MAGNETIC ISLANDS; MAGNETIC RECONNECTION; STARK EFFECT