根据神光Ⅲ激光器的运作方式和靶室结构,配套建设的X射线条纹相机在结构和性能上同以往有很大不同,建成后不仅应用于高时间分辨的实验诊断,也将用于神光Ⅲ主机各束激光同步性能的检验。设计的X射线条纹相机将全部采用模块化组件,拥有优于10 ps的时间分辨、15 lp/mm以上的空间分辨以及100 eV-10 keV能区的光阴极响应。相机在结构方面采用了非常独特的密闭气室结构,变像管、CCD,所有的电气控制设备都寄宿在气室内并保持常温和一个大气压的工作状态。整个相机系统内嵌了计算机工控设备,通过一根以太网线获得相机所有功能的远程控制。相机其它的特性还包括拥有完善的安全互锁系统以确保相机远程控制的安全;满足严格的EMI/EMP屏蔽要求以避免神光Ⅲ主机高能量激光发射带来的电磁干扰,并可采用光纤引入紫外时标光建立信号的绝对时间基准。

The elliptical bent crystal spectrometer (EBCS) is coupled to X-ray CCD, and a set of system called focusing spectrometer has been developed. Optimization calculation indicates that the EBCS will allow a large measuring spectral range (0.133～0.756 nm) with crystals of practical dimensions and for a working distance of 981.56 mm to the source and have a spectral resolving power (λ/Δλ) better than 1000 as well as high signal-noise-ratio. X-ray spectrum from the laser-produced plasma has first been measured by the EBCS in the “ShenGuang Ⅱ” Facility. Some ion-like spectral lines were identified and classified. The measured energy resolution of spectrograph was also given. Such emission of resonance line, satellite line inter-combination line of like ions, and Lyman alpha line is useful for establishing the spatial distribution of electron temperature and ions density maps.

对椭圆型聚焦晶体谱仪配X射线CCD相机的X射线谱测量系统进行了优化设计。优化设计后的椭圆型聚焦晶体谱仪系统的工作距离981.56 mm和摄谱范围0.133～0.756 nm,并具有很好的谱分辨本领(λ/Δλ≥1000)和信噪比。新设计的椭圆型聚焦晶体谱仪首次在“神光Ⅱ”X光激光靶室上成功地获得了激光等离子体谱线信息并辨认和归类了一些离子的谱线,同时还给出了实验测定的谱仪能量分辨率。其中一些离子谱线诸如类离子共振线、伴线、互组合线和Ly-α线谱可为下一步诊断激光等离子体的电子温度和离子密度的空间分布轮廓打下了坚实基础。