Visible Imaging of Edge Fluctuations in Heliotron J

Nobuhiro NISHINO; Koichi TAKAHASHI; Hayato KAWAZOME; Yohei FUKAGAWA; Tohru MIZUUCHI; Katsumi KONDO; Fumimichi SANO; Kazunobu NAGASAKI; Hiroyuki OKADA; Shinji KOBAYASHI; Satoshi YAMAMOTO

doi:10.1585/jspf.80.179

Rapid Communications

Visible Imaging of Edge Fluctuations in Heliotron J

Nobuhiro NISHINO, Koichi TAKAHASHI, Hayato KAWAZOME, Yohei FUKAGAWA, Tohru MIZUUCHI, Katsumi KONDO, Fumimichi SANO, Kazunobu NAGASAKI, Hiroyuki OKADA, Shinji KOBAYASHI, Satoshi YAMAMOTO

Author information

Nobuhiro NISHINO
Graduate school of Engineering, Hiroshima University
Koichi TAKAHASHI
Graduate School of Energy Science, Kyoto University
Hayato KAWAZOME
Graduate School of Energy Science, Kyoto University
Yohei FUKAGAWA
Graduate School of Energy Science, Kyoto University
Tohru MIZUUCHI
Institute of Advanced Energy Kyoto University
Katsumi KONDO
Graduate School of Energy Science, Kyoto University
Fumimichi SANO
Institute of Advanced Energy Kyoto University
Kazunobu NAGASAKI
Institute of Advanced Energy Kyoto University
Hiroyuki OKADA
Institute of Advanced Energy Kyoto University
Shinji KOBAYASHI
Institute of Advanced Energy Kyoto University
Satoshi YAMAMOTO
Institute of Advanced Energy Kyoto University

Keywords: edge fluctuations, fast visible camera, plasma rotation, Heliotron J

JOURNAL FREE ACCESS

2004 Volume 80 Issue 3 Pages 179-180

DOI https://doi.org/10.1585/jspf.80.179

Details

Abstract

High-speed 2-D imaging of edge fluctuations has been made by a C-MOS camera in Heliotron J. The camera monitored a limiter head, which was inserted into the peripheral plasma. In high-density ECH experiments it was found that the striped patterns of H_α emission near the limiter head periodically shifted along the poloidal direction. The typical spatial length and frequency of this shifted pattern were 8 cm and 5-6 kHz, respectively.

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