Novel Development in the Fusion Plasma Diagnostics Using a Near-infrared Spectroscopy
| Project/Area Number |
16K05631
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Kyoto University |
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Principal Investigator |
Kado Shinichiro 京都大学, エネルギー理工学研究所, 准教授 (10300732)
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| Research Collaborator |
Shikama Taiichi
Sakamoto Mizuki
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 近赤外分光 / ヘリウム輝線強度比 / MAP-II / ヘリオトロンJ / ホットスポット / 黒体輻射 / 絶対感度較正 / ヘリオトロンＪ / 安定抵抗 / ロングパスフィルタ / ダイバータ / 境界層プラズマ / パッシェン系列 / ヘリウム輝線 / リチウム分光 / 輝線強度比法 / 近赤外スペクトル / 衝突輻射モデル / ダイバータ模擬装置MAP-II / リチウム |
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| Outline of Final Research Achievements |
We have focused on near-infrared (NIR) spectroscopy, which had not been extensively exploited, to extend the target wavelength regime. We applied a simple and portable monitoring system to acquire the NIR spectra of Heliotron J plasmas in an attempt to survey the brightness of an unknown/unused line in the spectra, and a continuum spectra in NIR regime. Calibration of the visible(VIS) and NIR spectrometers were performed using the shorter and longer side of the tungsten halogen lamp and the second-order diffraction component of the VIS region was assessed. The He I Line intensity ratio method based on the CR model was extended to the NIR region. As a proof-of principle experiment, the electron density in the edge region was determined for H2-He plasma. Observed black-body radiation was identified to be due to the hot spot caused by super-thermal electrons due to electron cyclotron heating(ECH).
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| Academic Significance and Societal Importance of the Research Achievements |
従来、可視分光や真空紫外分光が用いられてきた核融合プラズマの分光診断において、近赤外領域の適用可能性に着目し、その有用性を示した。近赤外領域には可視光の２次回折光が重畳される懸念があるため、定量的な検出には注意を要する。一方、近年、この領域の小型分光器や検出器のラインナップが充実してきているため、定量評価・較正の手法を確立することは、意義深い。
ホットスポットはプラズマ対向壁の溶損や不純物発生の原因となり得るため、その観測・制御が不可欠であり、多くの金属の融点を含む1400-3200Kの温度に感受性が高い近赤外分光は、今後イメージ計測や高速化へと発展するニーズが高まってくると期待される。
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Report
(4 results)
Research Products
(19 results)
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[Presentation] ヘリオトロンJにおける可視・近赤外簡易分光システムの相互感度較正2018
Author(s)
岩田晃拓, 門信一郎, 金沢友美, 岡田浩之, 山本A, 本島厳, 岡崎悠, 南貴司, 小林進二, 長崎百伸, 大島慎介, 中村祐司, 石澤明宏, 木島滋, 木島滋, 水内亨
Organizer
日本物理学会第73回年次大会, 東京理科大学（野田キャンパス）
Related Report
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[Presentation] Application of Near-Infrared Spectroscopy to Heliotron J Plasma2017
Author(s)
S. Kado, A. Iwata, T. Kanazawa, H. Okada, S. Yamamoto, T. Minami, S. Kobayashi, K. Nagasaki, S. Ohshima, Y. Nakamura, A. Ishizawa, S. Konoshima, T. Mizuuchi
Organizer
Plasma Conference2017 (PLASMA 2017), 姫路商工会議所
Related Report
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[Presentation] Evaluation of applicability of atomic helium line intensity ratio method to electron temperature and density measurement in Heliotron J2017
Author(s)
T. Kanazawa, S. Kado, H. Kawazome, H. Okada, S. Yamamoto, T. Minami, S. Kobayashi, K. Nagasaki, S. Ohshima, Y. Nakamura, A. Ishizawa, S. Konoshima, X. Lu, H. Okazaki, K. Yamamoto, S. Tanohira, S. Watanabe, N. Haji, Y. Yonemura, T. Mizuuchi
Organizer
Plasma Conference2017 (PLASMA 2017), 姫路商工会議所
Related Report
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[Presentation] Spectroscopy2016
Author(s)
T. Shikama
Organizer
4th A3 foresight summer school and workshop on spherical torus
Place of Presentation
Chikushi Campus, Kyushu University
Year and Date
2016-08-02
Related Report
Int'l Joint Research / Invited
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