Proof-of-principle experiments on the concept of moving-surface plasma-facing components-hydrogen recycling over a titanium-gettered rotating drum
Proof-of-principle experiments on the concept of moving-surface plasma-facing components-hydrogen recycling over a titanium-gettered rotating drum
复制标题
关于移动表面等离子体组件概念的原理验证实验 - 钛吸气转鼓上的氢气回收
DOI：
10.1016/s0920-3796(03)00011-5
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发表时间：
2003
影响因子：
1.7
通讯作者：
S. Takamura
中科院分区：
文献类型：
--
作者：
Y. Hirooka;H. Fukushima;N. Ohno;S. Takamura
由于边缘条件直接影响核等离子体的性能，在现有的约束实验中，粒子控制已成为磁聚变界关注的焦点。然而，仍然没有明确的策略来应对反应堆稳态运行的需求。也就是说，由于饱和性质，硼化等壁调节不适用于稳态装置中的燃料和杂质颗粒控制，需要从启用概念开发开始。作为一种可能的解决方案，我们在之前的工作中提出了移动表面等离子体面向组件（ms - pfc）的概念，并在本工作中进行了原理验证实验。在这个概念中，等离子体表面被机械地循环到堆外，通过在其上涂上吸气膜来再生粒子捕获能力。一个原型的MS-PFC测试单元已经被构建用于这些原理验证实验，使用一个旋转的铜鼓作为移动表面，钛作为吸气材料。从旋转靶前的h α光强数据可以看出，相对于无吸气剂的情况，稳态下的氢气回收量减少了约6%。为了支持这些数据，一阶粒子平衡模型预测氢回收将减少7%。
In the magnetic fusion community much attention has recently been directed to particle control in the existing confinement experiments, as it is recognized that the core plasma performance can directly be affected by the edge conditions. However, it is still true that there is no clear strategy to cope with the needs for steady-state reactor operation. That is that, due to the saturation nature, wall conditioning such as boronization is not applicable for fuel and impurity particles control in steady-state devices, requiring a start from enabling concepts development. As a possible solution, the concept of moving-surface plasma-facing components (MS-PFCs) was proposed in our previous work and in the present work proof-of-principle experiments have been conducted. In this concept, the plasma-facing surface is mechanically circulated out-of-pile for regeneration of particle capturing capabilities by coating getter films on it. A prototypical MS-PFC test unit has been constructed for these proof-of-principle experiments, employing a rotating copper drum as the moving surface and titanium as the getter material. It has been indicated that, from Hαlight intensity data taken in front of the rotating target, relative to no getter cases, approximately 6% reduced hydrogen recycling has been achieved at steady state. In support of these data, a first-order particle balance model predicts a 7% reduction in hydrogen recycling.