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首页> 外文期刊>Nuclear fusion >Investigation of hydrogen recycling in long- duration discharges and its modification with a hot wall in the spherical tokamak QUEST
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Investigation of hydrogen recycling in long- duration discharges and its modification with a hot wall in the spherical tokamak QUEST

机译:球形托卡马克QUEST中长期放电中氢循环的研究及其在热壁中的改性

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摘要

Fully non-inductive plasma maintenance was achieved by a microwave of 8.2 GHz and 40 kW for more than 1 h 55 min with a well-controlled plasma-facing wall (PFW) temperature of 393 K, using a hot wall in the middle-sized spherical tokamak QUEST, until the discharge was finally terminated by the uncontrollability of the density. The PFW was composed of atmospheric plasma-sprayed tungsten and stainless steel. The hot wall plays an essential role in reducing the amount of wall-stored hydrogen and facilitates hydrogen recycling. The behaviour of fuel hydrogen in the PFW was investigated by monitoring the injection and evacuation of hydrogen into and from the plasma-producing vessel. A fuel particle balance equation based on the presence of a hydrogen transport barrier between the deposited layer and the substrate was applied to the long-duration discharges. It was found that the model could readily predict the observed behaviour in which a higher wall temperature likely gives rise to faster wall saturation.
机译:在中等大小的热壁下,通过8.2 GHz和40 kW的微波持续1 h 55 min以上,并在393 K的可控等离子体壁(PFW)温度得到良好控制的情况下,实现了完全无电感的等离子体维护球形托卡马克QUEST,直到放电由于密度的不可控制而最终终止。 PFW由大气等离子喷涂钨和不锈钢组成。热壁在减少壁上存储的氢气量并促进氢气回收方面起着至关重要的作用。通过监测氢在等离子体产生容器中的注入和排出,研究了PFW中燃料氢的行为。将基于沉积层和基底之间氢传输势垒的存在的燃料颗粒平衡方程式应用于长时间放电。发现该模型可以容易地预测观察到的行为,其中较高的壁温可能会导致较快的壁饱和度。

著录项

  • 来源
    《Nuclear fusion》 |2017年第12期|704-713|共10页
  • 作者单位

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580,Japan;

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580,Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Graduate School of Engineering, Kyoto University, Kyoto, 615-8530, Japan;

    Graduate School of Engineering, Kyoto University, Kyoto, 615-8530, Japan;

    Faculty of Science, Shizuoka University, Shizuoka, 422-8529, Japan;

    Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Shimane, 690-8504, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580,Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;

    Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, 277-8561, Japan;

    Graduate School of Engineering, Kyoto University, Kyoto, 615-8530, Japan;

    School of Industrial Engineering, Tokai University, Kumamoto, 862-8652, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    steady state operation; spherical tokamak; plasma wall interaction; particle balance; QUEST; hot wall;

    机译:稳态运行;球形托卡马克血浆壁相互作用;颗粒平衡寻求;热墙;

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