用云母弯晶谱仪探测Z箍缩等离子体X射线光谱

 为了研究Z箍缩等离子体辐射的X射线光谱，研制了可用于“阳”加速器上探测宽频谱范围的X射线椭圆弯曲晶体谱仪。该谱仪晶体分析器采用云母材料，椭圆焦距为1 350 mm，离心率为0.948 5，覆盖布拉格范围为30°~60°，可探测X射线波长范围为0.10~1.73 nm(0.86~1.00 nm除外)，用X射线胶片接收光谱信号。探测实验在中国工程物理研究院“阳”加速器上进行，实验结果表明:谱仪获取了氩的类氢共振线L_ya及其伴线、类氦共振线(1s2p¹P₁-1s2¹S₀)w线及磁四级M₂2跃迁(1s2p³P₂-1s²¹S₀)x线、互组合跃迁(1s2p³P₁-1s²¹S­₀)y线、禁戒谱线(1s2p³S₁-1s²¹S₀)z线和K­_-a线，谱线分辨率达到564。实验证明弯晶谱仪适合于Z箍缩等离子体X射线光谱学诊断。

Diagnosis of X-ray spectrum of Z-pinch plasma with mica curved crystal spectrometer

For the research of X-ray spectrum of Z-pinch plasma, a wide variety of X-ray and extreme ultraviolet diagnostics are being developed to study on Yang accelerator. An elliptical curved crystal spectrometer was designed and the spectrograph has 1 350 mm focal length and for these measurements, a mica crystal bent onto an elliptical substrate was utilized with an eccentricity e=0.948 5. The crystal analyzer covers the Bragg angel ranging from 30° to 60°. The ability of the mica crystal to efficiently reflect radiation in multiple orders allowed us to cover the entire spectral range from 0.10 to 1.73 nm except for a gap from 0.86 to 1.00 nm. The experiment was carried out on Yang accelerator and aimed to investigate the characteristics of a high density plasma. Experimental results using cu