Published 1990 | Version v1
Journal article Metadata-only

Soft-X-ray tomography of sawteeth and M=1 modes in ASDEX

Creators

  • 1. Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)

Description

High resolution tomographic analysis of sawtooth crashs in discharges with neutral beam injection (NBI) and with lower hybrid wave heating (LH) is performed. We find distinctly different temporal developments of precursor oscillations, implying the conclusion that not all crashs may be explained by the same mechanism. Furthermore, with the injection of neutral beams in counter-direction (ctr-NBI) a compound-like relaxation process is found, which we believe to be due to the presence of two q=1 surfaces. Stationary (m,n)=(1,1) modes and their impact on plasma heating in discharges with Lower Hybrid Current Drive (LHCD) are also investigated. (author) 9 refs., 8 figs., 1 tab

Additional details

Publishing Information

Journal Title
Europhysics Conference Abstracts
Journal Volume
14B
Series
Europhys. Conf. Abstr.
Journal Page Range
391-394
ISSN
0378-2271
CODEN
ECABD

Conference

Title
17. EPS conference on controlled fusion and plasma heating.
Dates
25-29 Jun 1990.
Place
Amsterdam (Netherlands).

INIS

Country of Publication
Switzerland
Country of Input or Organization
Switzerland
INIS RN
22082211
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
ASDEX TOKAMAK; EXPERIMENTAL DATA; LOWER HYBRID CURRENT DRIVE; LOWER HYBRID HEATING; MAGNETIC ISLANDS; MAGNETIC SURFACES; NEUTRAL ATOM BEAM INJECTION; PLASMA IMPURITIES; PRECURSOR; SAWTOOTH OSCILLATIONS; SOFT X RADIATION; TOMOGRAPHY
Descriptors DEC
BEAM INJECTION; CLOSED PLASMA DEVICES; DATA; ELECTROMAGNETIC RADIATION; HEATING; HIGH-FREQUENCY HEATING; IMPURITIES; INFORMATION; IONIZING RADIATIONS; MAGNETIC FIELD CONFIGURATIONS; NON-INDUCTIVE CURRENT DRIVE; NUMERICAL DATA; OSCILLATIONS; PLASMA HEATING; RADIATIONS; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; X RADIATION