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Observation of clump structure in transported particle orbit using an upgraded neutral particle analyzer during TAE burst in LHD
http://hdl.handle.net/10655/00012714
http://hdl.handle.net/10655/000127148983b43c-a316-490b-a569-a308abba8b57
名前 / ファイル | ライセンス | アクション |
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Nucl.Fusion60_pp112002 (1.4 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-12-15 | |||||
タイトル | ||||||
タイトル | Observation of clump structure in transported particle orbit using an upgraded neutral particle analyzer during TAE burst in LHD | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | toroidal Alfv´en eigenmodes | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | TAE burst | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | neutral particle analyzer | |||||
キーワード | ||||||
主題Scheme | Other | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
KAMIO, Shuji
× KAMIO, Shuji× Fujiwara, Yutaka× NAGAOKA, Kenichi× OGAWA, Kunihoro× Yamaguchi, Hiroyuki× NUGA, Hideo× ISOBE, Mitsutaka× OSAKABE, Masaki× Cheng, C. Z.× LHD, Experiment Group |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0003-0755-2433 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Toroidal Alfvén eigenmode (TAE) bursts are often observed in relatively low-magnetic-field experiments in the Large Helical Device (LHD) with tangential nuclear beam injection. During TAE bursts, hole-clump pairs in real space were observed in previous studies. In order to observe the behavior of the energetic particles during TAE bursts in more detail, a tangential E-parallel-B-type neutral particle analyzer (E||B-NPA) was upgraded to improve the time resolution up to 100 kilo samples per second by updating its measurement electronic circuits. Using this high time resolution E||B-NPA, the clump formations are clearly observed in real space. In order to analyze the observed particles with high time resolution, the conditional averaging technique is used. The lost energetic particles with 150 keV were initially observed just before the TAE burst, and the energy decreases faster than the classical slowing down time. The energetic particles transported by the TAE burst were detected with energy slowing down time of 6–8 ms for more than 6 ms after the TAE burst had finished. According to the orbit trace code Lorentz orbit (LORBIT) calculation, the particle pitch angle and radial location (ρ = r/a99) of the energetic particles resonating with the TAE mode frequency are increased by 5° and 0.2, respectively, during TAE bursts. These results are consistent with the observed downward frequency chirping of the magnetic fluctuation. By comparing the energy of the detected particles by E||B-NPA and the corresponding frequency of the magnetic fluctuation, the pitch angles of the resonant particles are considered to be 15°–25° at 150 keV before they are transported by the TAE burst. The frequency chirping of the magnetic fluctuation shows good agreement with the observed clump structure by considering the pitch angle of the resonant particles. | |||||
書誌情報 |
Nuclear Fusion 巻 60, 号 11, p. 112002, 発行日 2020-08-25 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
出版者 | ||||||
出版者 | International Atomic Energy Agency | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00295515 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00759871 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1088/1741-4326/ab7890 | |||||
権利 | ||||||
権利情報 | This is the Accepted Manuscript version of an article accepted for publication in Nuclear Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1741-4326/ab7890. | |||||
権利 | ||||||
権利情報 | © 2020 IAEA, Vienna | |||||
情報源 | ||||||
関連名称 | Citation S. Kamio et al 2020 Nucl. Fusion 60 112002 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/1741-4326/ab7890 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
NAIS | ||||||
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