First-Wall and limiter conditioning in TFTR
First-Wall and limiter conditioning in TFTR
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TFTR 中的 First-Wall 和限制器调节
DOI：
10.1016/0022-3115(84)90471-9
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发表时间：
1984
影响因子：
3.1
通讯作者：
F. Tenney
中科院分区：
文献类型：
--
作者：
H. Dylla;W. Blanchard;R. Hawryluk;K. Hill;R. B. Krawchuk;D. Mueller;D. Owens;A. Ramsey;S. Sesnic;F. Tenney
本文介绍了在TFTR运行第一年期间进行的真空容器调节实验研究的进展情况。先前的一篇论文描述了在初始等离子体启动实验之前和期间，为调节TFTR容器所做的努力。在启动阶段，在室温下对容器进行放电清洁。对于TFTR操作的第二阶段，其针对欧姆加热等离子体的优化，真空容器可以被加热到150°C。TFTR容器的内部结构在第二阶段期间更加复杂，增加了TiC/C可移动限制器阵列、因科镍合金波纹管盖板和ZrAl吸气剂泵。给出了定量比较容器烘烤，辉光放电清洗，脉冲放电清洗的有效性方面的总数量的去除碳和氧，残余气体的基础压力和由此产生的等离子体杂质水平，通过可见光，紫外和软X射线光谱测量。在TFTR氢同位素转换的初步经验，包括试图加快转换时间的结果，通过使用辉光放电预处理的容器与新的同位素。
A progress report on the experimental studies of vacuum vessel conditioning during the first year of TFTR operation is presented. A previous paper described the efforts expended to condition the TFTR vessel prior to and during the initial plasma start-up experiments. During the start-up phase, discharge cleaning was performed with the vessel at room temperature. For the second phase of TFTR operations, which was directed towards the optimization of ohmically-heated plasmas, the vacuum vessel could be heated to 150°C. The internal configuration of the TFTR vessel was more complex during the second phase with the addition of a TiC/C moveable limiter array, inconel bellows cover plates, and ZrAl getter pumps. A quantitative comparison is given on the effectiveness of vessel bakeout, glow discharge cleaning, and pulse discharge cleaning in terms of total quantity of removed carbon and oxygen, residual gas base pressures and the resulting plasma impurity levels as measured by visible, UV and soft X-ray spectroscopy. The initial experience with hydrogen isotope changeover in TFTR is presented including the results of the attempt to hasten the changeover-time by using a glow discharge to precondition the vessel with the new isotope.