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Study of High‐Beta Plasmas in a Helical System
Author(s) -
Yamada H.,
Watanabe K. Y.,
Sakakibara S.,
Suzuki Y.,
Ohdachi S.,
Kobayashi M.,
Funaba H.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200900014
Subject(s) - large helical device , plasma , beta (programming language) , magnetohydrodynamics , resistive touchscreen , magnetic field , physics , instability , perturbation (astronomy) , atomic physics , mechanics , computational physics , nuclear physics , computer science , engineering , quantum mechanics , electrical engineering , programming language
Recent experiments in LHD have demonstrated reactor‐relevant high β plasmas. The high beta state with the volume averaged beta of 5 % has been maintained for longer than 100 times the energy confinement time without any disastrous instability. Accumulated data and extended knowledge is a firm basis for a reactor assessment as well as comprehensive physics understanding of high β plasmas. This article addresses highlighted issues from the latest experimental observations in the LHD experiment, which are related to reconfirmation of gaps in non‐dimensional parameters, characteristics of growth of MHD instabilities, effects of stochastic magnetic field and resonant magnetic perturbation, and transport associated with a resistive interchange mode (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)