光子学报, 2005, 34 (5): 722, 网络出版: 2006-06-12
用于X射线时空分辨测量的弯晶谱仪
Bent Crystal Spectrometer for X-ray Space and Time Resolved Measurements
弯晶谱仪 激光等离子体 Χ射线光谱 空间分辨率 时间分辨率 Bent crystal spectrometer Laser-produced plasmas X-ray spectrum Spatial resolution Temporal resolution
摘要
为了测量激光聚变产生的0.2~0.37 nm范围内的等离子体X射线,设计了一种基于空间和时间分辨的聚焦型弯晶谱仪.将在700℃时弯曲后的LiF(2d=0.403 nm)晶体作为色散元件,布喇格衍射角的变化范围为30~67.5°,弯晶粘贴在离心率和焦距分别为0.9586和1350 mm的椭圆形不锈钢基底上.利用弯晶谱仪配X光CCD相机在星光Ⅱ激光(0.35 μm,60~80J,700 ps)装置上摄取了钛平面靶发射的X射线光谱,实验结果表明它的光谱分辨率能达到0.001 nm.
Abstract
In order to measure plasma X-ray produced by laser fusion in the 0.2~0.37 nm range, a focusing bent crystal spectrometer has been designed for measuring the spatial and temporal resolutions. The LiF crystal with a 2d spacing of 0.403 nm was elliptically bent at 700℃ for the dispersive element, the Bragg diffractive angles vary from 30 to 67.5 degrees, the bent LiF crystal was fixed on the elliptical stainless-steel substrate with an eccentricity of 0.9586 and a focal distance of 1350 mm. The X-ray spectrum emitted from the planar titanium target was photographed by using the bent crystal spectrometer coupled with the X-ray CCD camera at the XG-2 laser facility, the experimental result shows that the spectral resolution is up to 0.001 nm.
熊先才, 钟先信, 肖沙里, 钱家渝. 用于X射线时空分辨测量的弯晶谱仪[J]. 光子学报, 2005, 34(5): 722. 熊先才, 钟先信, 肖沙里, 钱家渝. Bent Crystal Spectrometer for X-ray Space and Time Resolved Measurements[J]. ACTA PHOTONICA SINICA, 2005, 34(5): 722.