2012 Fiscal Year Final Research Report
Turbulence Diagnostics Using Microwave Imaging Reflectometry in LHD
| Project/Area Number |
21246140
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
NAGAYAMA Yoshio 核融合科学研究所, ヘリカル研究部, 教授 (10126138)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAGUCHI Soichiro 関西大学, システム理工学部, 准教授 (30413991)
MASE Atsushi 九州大学, 産学連携センター, 特命教授 (00023325)
KOGI Yuichiro 福岡工業大学, 工学部, 准教授 (10398109)
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| Co-Investigator(Renkei-kenkyūsha) |
TSUCHIYA Hayato 核融合科学研究所, ヘリカル研究部・助教, 助教 (90509522)
EMOTO Masahiko 核融合科学研究所, ヘリカル研究部, 助教 (40311211)
KUWAHARA Daisuke 東京農工大学, 工学研究科, 助教 (60645688)
YOSHINAGA Tomokazu 防衛大学校, 応用科学群, 助教 (30467899)
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| Project Period (FY) |
2009 – 2012
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| Keywords | プラズマ計測 / マイクロ波 / ミリ波 / イメージング / 乱流 / 乱流 |
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| Research Abstract |
Three dimensional (3D) microwave imaging reflectometry (MIR) has been developed in the large helical device (LHD) to visualize fluctuating reflection surface due to the density fluctuation in the first time. The plasma is illuminated by the probe wave with 4 frequencies, which correspond to 4 radial positions, and the imaging optics makes the image of cut-off surface onto the 2D horn antenna mixer arrays (HMA). This system is applied to observe the edge harmonic oscillation (EHO), and a narrow structure along field lines is observed. The 3D MIR is expected to be one of the most powerful diagnostics to study turbulence and confinement.
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