Overview of recent progress on steady state operation of all-metal plasma facing wall device QUEST
Overview of recent progress on steady state operation of all-metal plasma facing wall device QUEST
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DOI：
10.1016/j.nme.2021.101013
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发表时间：
2021-05
影响因子：
2.6
通讯作者：
K. Hanada;N. Yoshida;M. Hasegawa;M. Oya;Y. Oya;I. Takagi;A. Hatayama;T. Shikama;H. Idei;Y. Nagashima;R. Ikezoe;T. Onchi;K. Kuroda;S. Kawasaki;A. Higashijima;T. Nagata;S. Shimabukuro;Katsumasa Nakamura;S. Murakami;Y. Takase;X. Gao;L. Huan;J. Qian
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文献类型：
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作者：
K. Hanada;N. Yoshida;M. Hasegawa;M. Oya;Y. Oya;I. Takagi;A. Hatayama;T. Shikama;H. Idei;Y. Nagashima;R. Ikezoe;T. Onchi;K. Kuroda;S. Kawasaki;A. Higashijima;T. Nagata;S. Shimabukuro;Katsumasa Nakamura;S. Murakami;Y. Takase;X. Gao;L. Huan;J. Qian
QUEST（Q-shu university experiment with steady state spherical tokamak）是一个中型球形托卡马克，能够稳态运行，包括全金属等离子体壁和热壁（HW），以解决与燃料粒子平衡有关的问题。HW于2014年夏季安装。定量分析有关的HW在373 K进行，并澄清的定量影响的拍摄历史，显然出现在壁存储的氢放电之前，在壁温。该模型表明等离子体诱导沉积层在燃料颗粒平衡中起着至关重要的作用。一个明确的温度依赖性的燃料回收利用后，观察等离子体终止放气，并发挥了至关重要的作用，在调节颗粒平衡。因此，在壁温为TW< 423 K，射频功率为40-60 kW的条件下，获得了持续1 h以上的长时间放电;同样，在TW= 473 K，注入射频功率为20 kW时，可获得6 h放电。
QUEST (Q-shu university experiment with steady state spherical tokamak) is a midsize spherical tokamak capable of steady-state operation, comprising all-metal plasma-facing walls and a hot wall (HW) to address issues pertaining to fuel particle balance. The HW was installed summer 2014. Quantitative analysis pertaining to the HW at 373 K is carried out, and clarify the quantitative impact of shot history that obviously appears in wall stored hydrogen just before the discharge at the wall temperature. The model indicates the plasma-induced deposition layer play an essential role in fuel particle balance. A clear temperature dependence of fuel recycling was observed using outgassing just after plasma termination and played an essential role in regulation of particle balance. Consequently, long duration discharges lasting more than 1 h has been obtained at wall temperature, TW< 423 K in the range of 40–60 kW of RF power and, similarly, a 6 h discharge could be achieved at TW= 473 K using 20 kW of injected RF power.