宽光谱在线弯晶谱仪研制

Fabrication of on-line wide energy range convex crystal spectrometer

研制了高精度在线准直、超宽光谱范围和高能谱分辨的在线凸圆柱面弯晶谱仪。使用耦合针状CsI(Tl)闪烁体的大面阵CMOS相机对X射线光谱进行在线测量,用QTZ(1010)(2d=0.851 2 nm)X射线晶体的能谱测量范围是1.84~7.38 keV,能谱分辨880@2.375 keV,动态范围≥1 000。在神光-Ⅲ主机高功率激光装置上,对钛激光等离子体发射的X射线谱进行实验测量,获得了优质的光谱图像;对钛离子X射线精细结构光谱进行了辨识,与理论计算和其他实验结果吻合。该谱仪用于神光-Ⅲ主机通用诊断搭载平台,具有抗瞬发超强电磁脉冲干扰能力,工作稳定。

The convex crystal spectrometer, consists of a convex crystal and CMOS camera which assembles CsI（T1） scintillation, has been designed and fabricated to record X- ray spectra in the energy range of 1.84-7.38 keV by QTZ （1010） （2d=0.8512 nm） X-ray crystal at one shot. The spectral resolving power was 880 at 2,375 keV, dynamic range of at least 1 000. This spectrometer has characteristics of online aiming, high resolving power, and wide energy range and less noise counts. At Shenguang-Ⅲ laser facilities, soft X-ray spectroscopy from Titanium laser-produced plasmas was obtained by the spectrometer, main lines of Titanium ions have been identified in the excellent agreement with theoretical calculation and other experiment results. On the DIM of Shenguang-Ⅲ laser facilities, the spectrometer can work stably and adapts to the over loading electron magnet pulse environment.