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Ion Internal Transport Barrier in the Large Helical Device
Author(s) -
Ida K.,
Yoshinuma M.,
Nagaoka K.,
Osakabe M.,
Morita S.,
Goto M.,
Funaba H.,
Yokoyama M.,
Ikeda K.,
Nakano H.,
Tsumori K.,
Takeiri Y.,
Kaneko O.,
Sakamoto Y.
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.200900041
Subject(s) - ion , tokamak , plasma , thermal diffusivity , large helical device , ion transporter , materials science , atomic physics , particle (ecology) , electron transport chain , physics , chemistry , thermodynamics , nuclear physics , oceanography , quantum mechanics , geology , biochemistry
The internal transport barrier (ITB) appears in ion root plasmas with NBI heating, when the T e / T i ratio is held below unity in LHD. The improvement of transport is observed only in the ion heat transport, not in the electron heat transport nor in the particle transport. During the formation of ion ITB, the region of low ion thermal diffusivity expands toward the plasma center and results in a wide weak ITB, which is in contrast to the narrow strong ITB typically observed in tokamaks (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)