Fast plasma discharge capillary design as a high power throughput soft x-ray emission source.
Fast plasma discharge capillary design as a high power throughput soft x-ray emission source.
复制标题
快速等离子体放电毛细管设计作为高功率吞吐量软 X 射线发射源。
DOI：
10.1063/1.3482070
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Bhuyan
中科院分区：
文献类型：
--
作者：
E. Wyndham;M. Favre;M. Valdivia;J. Valenzuela;H. Chuaqui;H. Bhuyan
本文介绍了一种用于极紫外和软X射线研究和应用的低能高重复率紧凑型等离子体毛细管源的实验细节和结果。两种长度的毛细管安装在两个版本的密切相关的设计。放电工作在1.6和3.2毫米内径氧化铝毛细管的长度为21和36毫米。使用水作为电介质和冷却剂简化了紧凑的低电感设计与纳秒放电周期。存储的放电电能约为0.5 J，并提供了直接充电的电容器板从一个廉价的绝缘栅双极晶体管在1 μs或更少。我们提出的特征氩光谱从等离子体之间的30和300欧姆以及时间分辨的X射线能量注量在轴上的离散带。 光谱还允许测量烧蚀壁材料的水平，并根据所选择的配置和能量存储与有用的毛细管寿命相关联。与瞬态空心阴极机制，软X射线输出，毛细管几何形状，和毛细管寿命的电子束之间的连接的报告。这些电子束和轴上测量的等离子体的作用进行了讨论。电子温度和观察到的电离阶段的关系进行了讨论的背景下，在非麦克斯韦等离子体电离的一些模型的结果。
We present the experimental details and results from a low energy but high repetition rate compact plasma capillary source for extreme ultraviolet and soft x-ray research and applications. Two lengths of capillary are mounted in two versions of a closely related design. The discharge operates in 1.6 and 3.2 mm inner diameter alumina capillaries of lengths 21 and 36 mm. The use of water both as dielectric and as coolant simplifies the compact low inductance design with nanosecond discharge periods. The stored electrical energy of the discharge is approximately 0.5 J and is provided by directly charging the capacitor plates from an inexpensive insulated-gate bipolar transistor in 1 μs or less. We present characteristic argon spectra from plasma between 30 and 300 Å as well as temporally resolved x-ray energy fluence in discrete bands on axis. The spectra also allow the level of ablated wall material to be gauged and associated with useful capillary lifetime according to the chosen configuration and energy storage. The connection between the electron beams associated with the transient hollow cathode mechanism, soft x-ray output, capillary geometry, and capillary lifetime is reported. The role of these e-beams and the plasma as measured on-axis is discussed. The relation of the electron temperature and the ionization stages observed is discussed in the context of some model results of ionization in a non-Maxwellian plasma.