The Development of the Material Plasma Exposure Experiment
The Development of the Material Plasma Exposure Experiment
复制标题
材料等离子体暴露实验的进展
DOI：
10.1109/tps.2016.2628326
复制
发表时间：
2016
影响因子：
1.5
通讯作者：
V. Varma
中科院分区：
文献类型：
--
作者：
J. Rapp;T. Biewer;T. Bigelow;J. Caughman;R. Duckworth;R. J. Ellis;D. Giuliano;R. Goulding;D. Hillis;R. Howard;T. Lessard;J. Lore;A. Lumsdaine;E. Martin;W. D. Mcginnis;S. Meitner;L. Owen;H. Ray;G. Shaw;V. Varma
未来聚变装置的可用性，如聚变核科学设施或示范聚变发电站，在很大程度上取决于其偏滤器中面向等离子体的部件的长工作寿命。ORNL正在设计材料等离子体暴露实验（MPEX），这是一种超导磁体，稳态设备，用于解决聚变反应堆的等离子体材料相互作用。MPEX将采用基于RF技术的新的高强度等离子体源概念。这个源概念将使实验能够覆盖未来聚变反应堆偏滤器中的整个预期等离子体条件。它将能够研究相关几何形状的侵蚀和再沉积，并在目标前方产生相关的电场和磁场。MPEX的设计是为了使事先中子辐照过的样品曝光。靶交换室被设计为从线性等离子体发生器脱离，使得其可以被转移到诊断站以进行更详细的表面分析。MPEX正在以逐步增加能力的分阶段方法进行开发。在螺旋源和电子回旋加速器加热系统的初步开发步骤之后，正在原型MPEX装置中测试源概念。Proto-MPEX已经实现了超过4×1019 m-3的电子密度与大直径（13厘米）的螺旋天线在100千瓦的功率。第一次加热微波导致更高的电离表示轴上的电子密度较高，与螺旋等离子体相比，只有没有微波加热。
The availability of future fusion devices, such as a fusion nuclear science facility or demonstration fusion power station, greatly depends on long operating lifetimes of plasma facing components in their divertors. ORNL is designing the Material Plasma Exposure eXperiment (MPEX), a superconducting magnet, steady-state device to address the plasma material interactions of fusion reactors. MPEX will utilize a new highintensity plasma source concept based on RF technology. This source concept will allow the experiment to cover the entire expected plasma conditions in the divertor of a future fusion reactor. It will be able to study erosion and redeposition for relevant geometries with relevant electric and magnetic fields in-front of the target. MPEX is being designed to allow for the exposure of a priori neutron-irradiated samples. The target exchange chamber has been designed to undock from the linear plasma generator such that it can be transferred to diagnostics stations for more detailed surface analysis. MPEX is being developed in a staged approach with successively increased capabilities. After the initial development step of the helicon source and electron cyclotron heating system, the source concept is being tested in the Proto-MPEX device. Proto-MPEX has achieved electron densities of more than 4×1019 m-3 with a large diameter (13 cm) helicon antenna at 100 kW power. First heating with microwaves resulted in a higher ionization represented by higher electron densities on axis, when compared with the helicon plasma only without microwave heating.