Transition of Edge Particle Transport in CHS

Shoichi OKAMURA; Takashi MINAMI; Chihiro SUZUKI; Mitsutaka ISOBE; Tetsutarou OISHI; Katsumi IDA; Yasuo YOSHIMURA; Kenichi NAGAOKA; Akihide FUJISAWA; Kazuo TOI; Tsuyoshi AKIYAMA; Harukazu IGUCHI; Ryosuke IKEDA; Shinichiro KADO; Keisuke MATSUOKA; Hiroyuki MATSUSHITA; Kiichiro NAKAMURA; Haruhisa NAKANO; Shin NISHIMURA; Masaki NISHIURA; Shinsuke OHSHIMA; Akihiro SHIMIZU; Shoji TAKAGI; Chihiro TAKAHASHI; Masaki TAKEUCHI; Mikirou YOSHINUMA

doi:10.1585/jspf.79.977

Rapid Communications

Transition of Edge Particle Transport in CHS

Shoichi OKAMURA, Takashi MINAMI, Chihiro SUZUKI, Mitsutaka ISOBE, Tetsutarou OISHI, Katsumi IDA, Yasuo YOSHIMURA, Kenichi NAGAOKA, Akihide FUJISAWA, Kazuo TOI, Tsuyoshi AKIYAMA, Harukazu IGUCHI, Ryosuke IKEDA, Shinichiro KADO, Keisuke MATSUOKA, Hiroyuki MATSUSHITA, Kiichiro NAKAMURA, Haruhisa NAKANO, Shin NISHIMURA, Masaki NISHIURA, Shinsuke OHSHIMA, Akihiro SHIMIZU, Shoji TAKAGI, Chihiro TAKAHASHI, Masaki TAKEUCHI, Mikirou YOSHINUMA

Author information

Shoichi OKAMURA
National Institute for Fusion Science
Takashi MINAMI
National Institute for Fusion Science
Chihiro SUZUKI
National Institute for Fusion Science
Mitsutaka ISOBE
National Institute for Fusion Science
Tetsutarou OISHI
Department of Quantum Engineering and System Science, Graduate School of Engineering, The University of Tokyo
Katsumi IDA
National Institute for Fusion Science
Yasuo YOSHIMURA
National Institute for Fusion Science
Kenichi NAGAOKA
National Institute for Fusion Science
Akihide FUJISAWA
National Institute for Fusion Science
Kazuo TOI
National Institute for Fusion Science
Tsuyoshi AKIYAMA
National Institute for Fusion Science
Harukazu IGUCHI
National Institute for Fusion Science
Ryosuke IKEDA
National Institute for Fusion Science
Shinichiro KADO
High Temperature Plasma Center, The University of Tokyo
Keisuke MATSUOKA
National Institute for Fusion Science
Hiroyuki MATSUSHITA
National Institute for Fusion Science
Kiichiro NAKAMURA
National Institute for Fusion Science
Haruhisa NAKANO
National Institute for Fusion Science
Shin NISHIMURA
National Institute for Fusion Science
Masaki NISHIURA
National Institute for Fusion Science
Shinsuke OHSHIMA
National Institute for Fusion Science
Akihiro SHIMIZU
National Institute for Fusion Science
Shoji TAKAGI
National Institute for Fusion Science
Chihiro TAKAHASHI
National Institute for Fusion Science
Masaki TAKEUCHI
National Institute for Fusion Science
Mikirou YOSHINUMA
National Institute for Fusion Science

Keywords: edge transport barrier, transition, power threshold, H-mode, H_α emission

JOURNAL FREE ACCESS

2003 Volume 79 Issue 10 Pages 977-979

DOI https://doi.org/10.1585/jspf.79.977

Details

Abstract

A clear transition of edge particle transport was observed for the neutral beam heated plasmas in CHS. The heating power threshold for the transition is about 1 MW for a plasma with 2 × 10¹⁹ m^-3 average density. The H_α emission drops within 1 msec and the increase of the local edge density at the transition was confirmed by means of YAG Thomson scattering and beam emission spectroscopy. When the heating power is well above the threshold, the transport barrier is maintained for the full duration of NBI heating (100 msec). A clear back transition appears when the heating power is decreased during the discharge.

Corresponding author

Register with J-STAGE for free!