为诊断激光等离子体X射线，研制了基于Bragg衍射原理的球面弯曲晶体。球面晶体可提高空间分辨、光谱分辨及立体角收集辐射能力。实验采用球面弯曲石英晶体作为分析器，X射线成像板作为成像器件，利用X射线衍射仪铬靶 Kα单色谱成像，验证了0.2 mm间隔双丝的单能像，球面弯晶具有较高的光谱分辨力和信噪比，谱分辨力可达1 000，聚光效率在同样距离条件下比平晶分析器高一个数量级以上。

A spherical bent crystal was developed based on Bragg diffraction to diagnose laser plasma X-ray. Spatial resolution, spectral resolution and radiation collected by solid angle were increased by using the spherically bent crystal. The spherically bent quartz crystal and X-ray imaging plate were adopted as X-ray analyzer and imaging device respectively. The imaging experiment was carried out with an X-ray diffractometer using Cr-target. The experimental results show that the monochromatic image of two-wire with a space of 0.2mm is obtained, the spectrograph of the spherically bent crystal offers good spectral resolution and signal-to-noise, and the calculated wavelength resolution reaches 1000 in 0.2 nm~0.4 nm. The spherically bent crystal is suitable for diagnosing soft X-ray spectroscopy, and the focusing intensity for spherically bent crystal is an order of magnitude higher than plane crystal at the same condition.