Improved Data Acquisition Methods for Uninterrupted Signal Monitoring and Ultra-Fast Plasma Diagnostics in LHD
スポンサーリンク
概要
- 論文の詳細を見る
To deal with endless data streams acquired in LHD steady-state experiments, the LHD data acquisition system was designed with a simple concept that divides a long pulse into a consecutive series of 10-s “subshots”. Latest digitizers applying high-speed PCI-Express technology, however, output nonstop gigabyte per second data streams whose subshot intervals would be extremely long if 10-s rule was applied. These digitizers need shorter subshot intervals, less than 10-s long. In contrast, steady-state fusion plants need uninterrupted monitoring of the environment and device soundness. They adopt longer subshot lengths of either 10 min or 1 day. To cope with both uninterrupted monitoring and ultra-fast diagnostics, the ability to vary the subshot length according to the type of operation is required. In this study, a design modification that enables variable subshot lengths was implemented and its practical effectiveness in LHD was verified.
著者
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KAWAHATA Kazuo
National Insitute for Fusion Science
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EMOTO Masahiko
National Insitute for Fusion Science
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NAGAYAMA Yoshio
National Insitute for Fusion Science
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NAKANISHI Hideya
National Insitute for Fusion Science
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SHOJI Mamoru
National Insitute for Fusion Science
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Miyake Hitoshi
National Institute For Fusion Science
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KOJIMA Mamoru
National Institute for Fusion Science
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OHSUNA Masaki
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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IMAZU Setsuo
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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NONOMURA Miki
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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OHSUNA Masaki
National Institute for Fusion Science, Toki 509-5292, Japan
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NONOMURA Miki
National Institute for Fusion Science, Toki 509-5292, Japan
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YOSHIDA Masanobu
National Institute for Fusion Science, Toki 509-5292, Japan
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IWATA Chie
National Institute for Fusion Science, Toki 509-5292, Japan
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IWATA Chie
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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NAGAYAMA Yoshio
National Institute for Fusion Science, Toki 509-5292, Japan
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EMOTO Masahiko
National Institute for Fusion Science, Toki 509-5292, Japan
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KOJIMA Mamoru
National Institute for Fusion Science, Toki 509-5292, Japan
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YOSHIDA Masanobu
National Institute for Fusion Science
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