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Title: Confinement improvement by fluctuating input power

An interesting effect of the fluctuating input power on plasma confinement is reported. Specifically, the addition of the sinusoidal perturbation, Asin(wt), to constant power q{sub 0} is shown to promote the confinement, leading to the L-H transition at a lower value of q{sub 0}, as compared to the case of constant q{sub 0} without the sinusoidal perturbation. In general, higher amplitude (A) and lower frequency (w) are found to be more favorable for the L-H transition while an interesting linear relation between A and w leading to the L-H transition is established for different values of q{sub 0}.
Authors:
; ;  [1]
  1. School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH (United Kingdom)
Publication Date:
OSTI Identifier:
22218471
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; DISTURBANCES; H-MODE PLASMA CONFINEMENT; L-MODE PLASMA CONFINEMENT; MODE CONVERSION; PLASMA; THERMONUCLEAR REACTORS; TOKAMAK DEVICES