Plasma and Fusion Research
Volume 2, S1066 (2007)
Regular Articles
- Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan
- 1)
- National Institute for Fusion Science, Toki 509-5292, Japan
Abstract
In the Large Helical Device (LHD), several 20-channel Soft X-ray (SX) detector arrays are used to observe the radial structures of SX fluctuations related to MHD instabilities. Recently, 20-channel absolute extreme ultraviolet (AXUV) detector arrays have also been installed inside the vacuum vessel in the vertically and horizontally elongated sections of LHD to monitor MHD fluctuations of AXUV emissions emitted from edge plasma region. These AXUV detector arrays have often detected edge MHD fluctuations localized in low temperature and density edge region so that the SX detector arrays cannot be detected. In LHD, these SX and AXUV detector array systems are successfully employed in order to investigate radial structure and temporal behaviors of edge MHD modes.
Keywords
soft x-ray detector array, absolute extreme ultraviolet detector array, edge MHD mode, edge localized mode, LHD
Full Text
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This paper may be cited as follows:
F. WATANABE, K. TOI, S. OHDACHI, C. SUZUKI, S. SAKAKIBARA, K. Y. WATANABE, S. MORITA, K. NARIHARA, K. TANAKA and LHD experimental group, Plasma Fusion Res. 2, S1066 (2007).