Large Deviation Statistical Analysis on Plasma Turbulence based on Conditional Averaging

• Project/Area Number: 26420852
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: Kyushu University
• Principal Investigator: Nagashima Yoshihiko 九州大学, 応用力学研究所, 准教授 (90390632)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 条件付平滑化 / プラズマ乱流 / 大偏差統計解析 / 電圧バイアス実験 / レイノルズ応力 / バイアス / トカマク / 鋸歯状振動 / 非線形データ解析 / 大偏差統計 / 条件付き平滑化

Outline of Final Research Achievements

This study aims at clarifying periodic and non-periodic changes in fluctuation power spectrum by using a conditional averaging based on probability density functions and so on. In analysis on JFT-2M tokamak data, power spectra at plasma edge region are calculated based on each phase of decomposed global Sawtooth pulse, and changes of amplitudes of oscillatory zonal flows and drift-wave turbulence during the Sawtooth was clarified. In analysis on linear plasma device PANTA data, two-dimensional wavenumber structures are reconstructed by correlation analysis, and conditional averaging over phases with and w/o electric biasing clarifies changes in the wavenumber structures during the biasing.

Research Products

• [Journal Article] Improvement of the Reynolds Stress Probe for End-Plate Biasing Experiments in a Cylindrical Laboratory Plasma (2016)
  • Author(s): T. Kanzaki, Y. Nagashima, S. Inagaki, F. Kin, Y. Miwa, M. Sasaki, T. Yamada, A. Fujisawa, T. Kobayashi, N. Kasuya, Y. Kosuga, S.-I. Itoh and K. Itoh
  • Journal Title: Plasma and Fusion Research Volume: 11 Issue: 0 Pages: 1201091-1201091
  • DOI: 10.1585/pfr.11.1201091
  • NAID: 130005311663
  • ISSN: 1880-6821
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Observation of Parallel Force Balance for Drift Wave Fluctuation by a Fast Voltage Sweeping Method in a Linear Plasma (2015)
  • Author(s): Yoshihiko Nagashima, Shigeru Inagaki, Akihide Fujisawa, Hiroyuki Arakawa, Takuma Yamada, Yudai Miwa, Tatsuya Kobayashi, Sanae-I. Itoh, and Kimitaka Itoh
  • Journal Title: Journal of the Physical Society of Japan Volume: 84 Issue: 6 Pages: 0635011-3
  • DOI: 10.7566/jpsj.84.063501
  • NAID: 40020491100
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] エンドプレートバイアス時の多チャンネルプローブ計測 (2017)
  • Author(s): 永島芳彦, 藤澤彰英, 稲垣滋, 神崎智継, 金史良, 荒川弘之, 小林達哉, 山田琢磨, 山崎広太郎, 福田郁未, 狹間田一誠, 小菅佑輔, 佐々木真, 糟谷直宏, 伊藤早苗, 伊藤公孝
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス
  • Year and Date: 2017-03-18
• [Presentation] 直線プラズマにおける乱流トモグラフィーデータとラングミュ アプローブデータの比較 (2016)
  • Author(s): 永島芳彦，藤澤彰英，稲垣 滋，山崎広太郎， 江藤健太，多和航希，元吉喬望，上原 耀，神崎智継， 金 史良，山田琢磨，小林達哉，荒川弘之， 小菅佑輔，佐々木真，糟谷直宏，伊藤早苗， 伊藤公孝
  • Organizer: 第33回 プラズマ・核融合学会 年会
  • Place of Presentation: 東北大学青葉山キャンパス
  • Year and Date: 2016-12-02
• [Presentation] 直線プラズマ装置における電位揺動計測のための静電シールド 付きプローブの開発 (2016)
  • Author(s): 神崎智継，永島芳彦，稲垣 滋，山田琢磨， 金 史良，山崎広太郎，藤澤彰英，糟谷直宏， 小菅佑輔，佐々木真，荒川弘之，小林達哉， 垂水智哉，挾間田一誠，湊 良祐，伊藤早苗， 伊藤公孝
  • Organizer: 第33回 プラズマ・核融合学会 年会
  • Place of Presentation: 東北大学青葉山キャンパス
  • Year and Date: 2016-12-01
• [Presentation] 直線磁化プラズマにおける軸方向不均一性の観測 (2016)
  • Author(s): 福田郁未，稲垣 滋，小菅佑輔，佐々木真， 永島芳彦，山田琢磨，藤澤彰英，糟谷直宏， 荒川弘之，山崎広太郎，金良史，伊藤早苗， 伊藤公孝
  • Organizer: 第33回 プラズマ・核融合学会 年会
  • Place of Presentation: 東北大学青葉山キャンパス
  • Year and Date: 2016-12-01
• [Presentation] Data analysis of plasma turbulence in a linear device and its application to Heliotron-J (2016)
  • Author(s): Yoshihiko NAGASHIMA
  • Organizer: The 7th International Symposium of Advanced Energy Science - Frontiers of Zero Emission Energy -
  • Place of Presentation: 京都大学吉田キャンパス
  • Year and Date: 2016-09-05
  • Int'l Joint Research / Invited
• [Presentation] エンドプレートバイアス実験時のレイノルズ応力の動的応答 (2016)
  • Author(s): 永島芳彦、神崎智継、金良史、稲垣滋、山田琢磨、荒川弘之、小林達也、佐々木真、糟谷直宏、小菅佑輔、藤澤彰英、伊藤早苗、伊藤公孝
  • Organizer: 核融合エネルギー連合講演会
  • Place of Presentation: 九州大学伊都キャンパス椎木講堂
  • Year and Date: 2016-07-14
• [Presentation] 直線プラズマ装置におけるエンドプレートバイアス時のレイノルズストレスの計測 (2016)
  • Author(s): 神崎智継、永島芳彦、稲垣滋、山田琢磨、三輪祐大、金良史、藤澤彰英、小菅佑輔、糟谷直宏、佐々木真、伊藤早苗、伊藤公孝
  • Organizer: 核融合エネルギー連合講演会
  • Place of Presentation: 九州大学伊都キャンパス椎木講堂
  • Year and Date: 2016-07-14
• [Presentation] Measurement of Reynolds Stress induced by end-­‐plate biasing in a cylindrical laboratory plasma (2015)
  • Author(s): T. Kanzaki, et al.
  • Organizer: Japan Society of Plasma Science and Nuclear Fusion Research
  • Place of Presentation: Kumamoto University, Kumamoto
  • Year and Date: 2015-12-19
• [Presentation] Measurement of Reynolds Stress in end-­‐plate biasing experiment in PANTA (2015)
  • Author(s): T. Kanzaki, et al.
  • Organizer: 17th Cross Straits Symposium on Materials, Energy and Environmental Sciences
  • Place of Presentation: Kyushu University
  • Year and Date: 2015-12-02
  • Int'l Joint Research
• [Presentation] Change in Reynolds stress induced by end-plate biasing in a cylindrical laboratory plasma (2015)
  • Author(s): T. Kanzaki, et al.
  • Organizer: International Toki Conference 25
  • Place of Presentation: Ceratopia Toki, Toki, Gifu, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] Reconstruction of Cross-Sectional Structure of Reynolds Stress in End-Plate Biasing Experiment in PANTA (2015)
  • Author(s): F. Kin, et al.
  • Organizer: International Toki Conference 25
  • Place of Presentation: Ceratopia Toki, Toki, Gifu, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] 非平衡極限 - 直線プラズマにおける乱流遷移の確率過程の観測 (2014)
  • Author(s): 永島芳彦，伊藤早苗，藤澤彰英，稲垣 滋，小林達哉，山田琢磨，荒川弘之，糟谷直宏，佐々木真，M. Lesur，小菅佑輔，伊藤公孝
  • Organizer: Plasma Conference 2014
  • Place of Presentation: Toki Messe, Niigata, Japan
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Comparison between fluctuation data measured with multi-channel spectroscopic system and that measured with Langmuir probe in PANTA (2014)
  • Author(s): Y. Nagashima, A. Fujisawa, K. Takahashi, K. Taketsugu, S. Ohno, F. Fukunaga, N. Hamamoto, R. Shibata, S. Inagaki, T. Yamada, H. Arakawae, T. Kobayashi, Y. Miwa, M. Sasaki, Y. Kosuga, M. Lesur, N. Kasuya, S. -I. Itoh and K. Itoh
  • Organizer: 24th International Toki Conference
  • Place of Presentation: セラトピア土岐、土岐市、岐阜
  • Year and Date: 2014-11-04 – 2014-11-07
• [Remarks] 九州大学 研究者情報 研究活動
  • URL: http://hyoka.ofc.kyushu-u.ac.jp/search/details/K004384/research.html
• [Remarks] 九州大学 研究者情報
  • URL: http://hyoka.ofc.kyushu-u.ac.jp/search/details/K004384/index.html