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Dynamics of weak-magnetic-shear-sustained internal transport barrier during supersonic molecular-beam injection in JT-60U
https://repo.qst.go.jp/records/81757
https://repo.qst.go.jp/records/81757a7ab089b-8b28-4301-b9f1-c3bc2bb328df
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-02-01 | |||||
| タイトル | ||||||
| タイトル | Dynamics of weak-magnetic-shear-sustained internal transport barrier during supersonic molecular-beam injection in JT-60U | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Fumiyoshi, Kin
× Fumiyoshi, Kin× Maiko, Yoshida× Hidenobu, Takenaga× Mitsuru, Honda× Naoki, Tamura× Emi, Narita× Kensaku, Kamiya× Takahiro, Bando× Takuma, Wakatsuki× Akihiko, Isayama× Fumiyoshi, Kin× Maiko, Yoshida× Hidenobu, Takenaga× Mitsuru, Honda× Naoki, Tamura× Emi, Narita× Kensaku, Kamiya× Takahiro, Bando× Takuma, Wakatsuki× Akihiko, Isayama |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The characteristics of ion heat transport inside the internal transport barrier (ITB), which is sustained by weak magnetic shear, are investigated using a cold pulse induced by supersonic molecular-beam injection (SMBI) in JT-60U. It is known that cold-pulse propagation in ITBs usually significantly reduces the temperature and degrades the temperature gradient. When subsequent SMBIs are launched before the temperature has recovered, it is observed that the temperature gradient of the ITB is not monotonically decreased but alternately decreased and increased. Alternating decreasing and increasing phases of the ITB temperature gradient continue for about 1 s (~6τE), and the properties of the cold-pulse propagation and the flux-gradient relations differ according to the phase. The usual transient transport analysis is also provided by inducing a cold pulse in stationary ITBs. A rapid reduction and recovery of the temperature is observed inside the ITBs, and it is found that the ion-heat flux changes without a variation in the local ion-temperature gradient or a change to the other observable local parameters. The flux-gradient relations exhibit significant hysteresis in two ITB cases: (i) ITBs with strong electron-density gradients and (ii) ITBs with weak ion-temperature gradients. In addition, the range in which hysteresis appears is most likely to depend on the width of the ITB. | |||||
| 書誌情報 |
Nuclear Fusion 巻 61, 号 2, p. 026017, 発行日 2021-02 |
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| 出版者 | ||||||
| 出版者 | IoP Publishing, International Atomic Energy Agency, EURATOM | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0029-5515 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1741-4326/abcad3 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://iopscience.iop.org/article/10.1088/1741-4326/abcad3 | |||||
