[Table of Contents]

Plasma and Fusion Research

Volume 2, S1055 (2007)

Regular Articles

2-D Image Diagnostic Technique for Edge Turbulence Using Fast Cameras
N. NISHINO, T. MIZUUCHI1), Z. FENG2), S. KOBAYASHI1), K. NAGASAKI1), H. OKADA1), F. SANO1), K. KONDO3), Y. NAKASHIMA4), Y. HIGASHIZONO4), H. KAWANO4), T. CHO4), M. SHOJI5), K. SASAKI6), K. HANADA7) and H. ZUSHI7)
Graduate school of Engineering, Hiroshima University, Hiroshima 739-8527, Japan
1)
Institute of Advanced Energy Kyoto University, Kyoto 611-0011, Japan
2)
Southwestern Institute of Physics, Chengdu, China
3)
Graduate School of Energy Science, Kyoto University, Kyoto 611-0011, Japan
4)
Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
5)
National Institute of Fusion Science, Gifu 509-5292, Japan
6)
Graduate School of Engineering Sciences, Kyushu Univ., Kasuga 816-8580, Japan
7)
Research Institute for Applied Mechanics, Kyushu Univ., Kasuga 816-8580, Japan
(Received 7 December 2006 / Accepted 18 April 2007 / Published 20 November 2007)

Abstract

Fast cameras are powerful tool to visualize the edge turbulence in peripheral plasmas. Under Bi-directional collaborations recently in Heliotron J and GAMMA10 filamentary structures along the magnetic field line were firstly observed with GPI (gas puff imaging) by fast camera. In both machines the filamentary structures had similar stripe pattern in the images and simultaneous measurements of the ion saturation current by electrostatic probes show that the filamentary structures were relatively higher electron density/temperature regions in peripheral plasmas. It is not sufficient to conclude both filamentary structures are the same, however, these phenomena were thought to be related to the energy confinement. Thus the physics mechanism should be solved in the near future.

Keywords

2-d image, fast camera, edge turbulence, Heliotron J, GAMMA10, CPD, ST

DOI: 10.1585/pfr.2.S1055

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This paper may be cited as follows:

N. NISHINO, T. MIZUUCHI, Z. FENG, S. KOBAYASHI, K. NAGASAKI, H. OKADA, F. SANO, K. KONDO, Y. NAKASHIMA, Y. HIGASHIZONO, H. KAWANO, T. CHO, M. SHOJI, K. SASAKI, K. HANADA and H. ZUSHI, Plasma Fusion Res. 2, S1055 (2007).