skip to main content

SciTech ConnectSciTech Connect

Title: Characteristics of magnetic island formation due to resistive interchange instability in helical plasma

Focusing attention on the magnetic island formation, we investigate the characteristics of the resistive interchange magnetohydrodynamics instabilities, which would limit a high beta operational regime in helical type fusion reactors. An introduction of a new index, i.e., the ratio of the magnetic fluctuation level to the radial displacement, enables us to make a systematic analysis on the magnetic island formation in the large helical device-like plasmas during the linear growth phase; (i) the interchange instability with the second largest growth rate makes the magnetic island larger than that with the largest growth rate when the amplitude of the radial displacement in both cases is almost the same as each other; (ii) applied to a typical tearing instability, the index is smaller than that for the interchange instability with the second largest growth rate.
Authors:
; ; ;  [1] ; ;  [2]
  1. Graduate School of Hokkaido University, Sapporo 060-8628 (Japan)
  2. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22252903
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 5; Other Information: (c) 2014 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; FLUTE INSTABILITY; HIGH-BETA PLASMA; LHD DEVICE; MAGNETIC ISLANDS; TEARING INSTABILITY; THERMONUCLEAR REACTORS