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Fully non-inductive plasma start-up with lower-hybrid waves using the outboard-launch and top-launch antennas on the TST-2 spherical tokamak
https://repo.qst.go.jp/records/54867
https://repo.qst.go.jp/records/54867605bf6da-3576-465f-9237-fac3c912edc4
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-03-14 | |||||
| タイトル | ||||||
| タイトル | Fully non-inductive plasma start-up with lower-hybrid waves using the outboard-launch and top-launch antennas on the TST-2 spherical tokamak | |||||
| 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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 |
Tsujii, Naoto
× Tsujii, Naoto× Takase, Yuichi× Ejiri, Akira× 新屋, 貴浩× Yajima, Satoru× Yamazaki, Hibiki× Togashi, Hiro× P., Moeller Charles× Roidl, Benedikt× Takahashi, Wataru× Toida, Kazuya× Yoshida, Yusuke× 新屋 貴浩 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Removal of the central solenoid is essential to realize an economical spherical tokamak fusion reactor, but non-inductive plasma start-up is a challenge. On the TST-2 spherical tokamak, non-inductive plasma start-up using lower-hybrid (LH) waves has been investigated. Using the capacitively-coupled combline (CCC) antenna installed at the outboard midplane, fully non-inductive plasma current ramp-up up to a quarter of that of the typical Ohmic discharges has been achieved. Although it was desirable to keep the density low during the plasma current ramp-up to avoid the LH density limit, it was recognized that there was a maximum current density that could be carried by a given electron density. Since the density needed to increase as the plasma current was ramped-up, the achievable plasma current was limited by the maximum operational toroidal field of TST-2. The top-launch CCC antenna was installed to access higher density with up-shift of the parallel index of refraction. Numerical analysis of LH current drive with the outboard-launch and top-launch antennas was performed and the results were qualitatively consistent with the experimental observations. | |||||
| 書誌情報 |
22 Topical Conference on Radio-Frequency Power in Plasmas 号 157, p. 02009, 発行日 2017-10 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1051/epjconf/201715702009 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.epj-conferences.org/articles/epjconf/abs/2017/26/epjconf_rfppc2017_02009/epjconf_rfppc2017_02009.html | |||||
| 関連名称 | https://www.epj-conferences.org/articles/epjconf/abs/2017/26/epjconf_rfppc2017_02009/epjconf_rfppc2017_02009.html | |||||
