Masakatsu Fukumoto, Qilin Yue, K. Hanada, Shinichiro Kojima, Tomohide Nakano, N. Y. Yoshida, R. Ikezoe, Yoshihiko Nagashima, Takeshi Ido, T. Onchi, H. Idei, Hiroki Iguchi, Takumi Komiyama, T. Shikama, A. Ejiri, S. Masuzaki, Mizuki Sakamoto, Yoshio Ueda, K. Kuroda, K. Kono, S. Shimabukuro, A. Higashijima
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引用次数: 0
摘要
使用氖气的电子回旋加速器壁调节（Ne-ECWC）是在正常导电球形托卡马克 QUEST 上进行的，该托卡马克具有金属壁，在捕获粒子配置下具有混合 O 型和 X 型极化 EC 波，频率为 8.2 千兆赫，注入功率为 16 千瓦。氖-ECWC 从壁上去除氢气，但氖的残留量很小。Ne-ECWC 减少了后续托卡马克放电中的氢回收，有助于改善后续托卡马克等离子体的启动：等离子体电流增加，等离子体电流的启动时间提前。然而，暴露于 Ne-ECWC 等离子体的钨表面会形成空洞和气泡等缺陷。
Hydrogen removal by electron cyclotron wall conditioning with neon gas and its impact of tokamak plasma start-up on the QUEST spherical tokamak
Electron Cyclotron Wall Conditioning with Neon gas (Ne-ECWC) has been performed on the normal conducting spherial tokamak QUEST with metal walls under a trapped particle configuration with mixed O and X-mode polarization EC waves with a frequency of 8.2 GHz and an injection power of 16 kW. The Ne-ECWC removes hydrogen from the wall with small neon retention. The Ne-ECWC decreases hydrogen recycling at the following tokamak discharges, contributing to an improvement of the following tokamak plasma start-up: the plasma current increases and the start-up timing of the plasma current shifts forward. However, defects such as voids and bubbles are formed on tungsten surface exposed to the Ne-ECWC plasma.
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