Proof-of-principle experiments on the particle control capability of the moving -surface plasma-facing component concept.

由于众所周知，高性能的核心等离子体有利于低壁面回收条件，现有的一些磁聚变实验采用了壁面调节技术，如渗硼。然而，本质上，由于注入的燃料和杂质颗粒的表面饱和，这些墙体调节技术的有效寿命有限。因此，对于未来的稳态聚变装置，必须开发使能壁的概念，以保持面向等离子体的组件(PFC)在稳态等离子体相互作用条件下的表面不饱和。在本研究计划中，采用水冷旋转滚筒以保持粒子100%回收的PFC的新概念已经使用稳态线性磁化等离子体装置进行了检验。在密度约为10^&lt；11&gt；1/cc、电子温度约为10 eV的等离子体轰击下，在沉积速率约为10Å/S的条件下，用钛对转鼓进行连续强化，并用光谱监测了H_α的强度。实验结果表明，即使在稳定状态下，氢循环也可降低到94%。建立了一个零维粒子平衡模型，并利用保守的文献数据很好地再现了实验数据。下一步，为了考察流动的液体(金属)作为PFC的可能性，对实验装置进行了改进，使等离子体流可以水平或垂直定向。因为这是独一无二的设施，并已在全国范围内发行的几家报纸上进行了报道。该装置目前的现状是，所有的等离子体诊断设备都已经进行了各自的功能测试，并且已经进行了第一次液态锂实验。

Because it is well known that high-performance core plasma favors low wall recycling conditions, a number of existing magnetic fusion experiments employ wall conditioning techniques such as boronization. However, by nature these wall conditioning techniques have finite lifetime of efficacy due to the surface saturation with implanted fuel and impurity particles. It follows immediately from this that for future steady state fusion devices, enabling wall concepts must be developed to maintain surfaces of plasma-facing components (PFCs) unsaturated under steady state plasma interaction conditions.In this research program, a new concept of PFC, employing a water-cooled rotating drum intended to maintain particle recycling <100% has been examined using a steady state linearly magnetized plasma device. Under plasma bombardment with densities around 10^<11> 1/cc and electron temperatures around 10 eV, the rotating drum was continuously Bettered with titanium, at deposition rates around 10Å/s and the intensity of H_α was monitored with spectroscopy. Experimental results indicate that hydrogen recycling is reduced down to 94% even at steady state. A zero-dimensional particle balance model has been developed and reproduced the experimental data quite well using conservative literature data substituted into it.As the next step, to examine the possible use of flowing liquid (metals) as a PFC, the experimental facility has been modified in such a way that the plasma flow can be directed either horizontally or vertically. Because this is a one-of-a-kind facility, and has been reported in a couple of nation-wide circulated newspaper. The present status of this facility is that all the plasma diagnostics have been tested for their own functions and the first liquid lithium experiments have been done.