光学学报, 2012, 32 (4): 0430001, 网络出版: 2012-03-30  

双通道共轴聚焦型X射线晶体光谱仪

Dual-Channel, Co-axial, Focusing X-Ray Crystal Spectrograph
作者单位
1 中国工程物理研究院流体物理研究所, 四川 绵阳 621900
2 重庆大学光电技术及系统教育部重点实验室, 重庆 400044
摘要
研制了一种用于Z箍缩等离子体X射线光谱诊断的双通道共轴聚焦型晶体光谱仪。谱仪采用均匀色散(即线色散率为常数)和球面云母晶体作为两个通道的X射线色散元件,位于中轴线上的双胶片盒作为探测器,在大致相同的光谱范围内同时获取Z箍缩等离子体的时间积分光谱。在中国工程物理研究院“阳”加速器上开展了Z箍缩内爆摄谱实验,两通道分别获得了Z箍缩铝丝阵等离子体的类氢和类氦光谱谱线。实验结果表明:均匀色散通道光谱分布遵循均匀色散条件,实验得到的线色散率和设计值吻合很好,最大相对误差仅为3.48%,和球面晶体通道相比,它能更容易、更准确识别和处理光谱,在识别和分析陌生复杂光谱成分时具有优势。
Abstract
A dual-channel, co-axial, focusing X-ray crystal spectrograph is developed for spectroscopy of the Z-pinch plasmas. The spectrograph uses a uniform-dispersed crystal (the linear dispersion is a constant) and a spherical crystal as the dispersion element and a double-film box as the detector to achieve the simultaneous measurement of the time-integrated spectra of the plasmas in almost the same spectral range. The experiment is carried out on the “Yang” accelerator at Chinese Academy of Engineering Physics (CAPE) and the H-like and He-like emission lines of Al Z-pinch plasmas are obtained. The results show that the linear dispersion obtained by the uniform-dispersed channel, is agree with the designed value very well due to satisfying the uniform dispersion condition, and the maximum relative error is only 3.48%. Compared with the spherical crystal channel, it has the advantage of easiness and veracity for spectra identification and processing and it may be useful for the complicated spectra identification and analysis.

阳庆国, 李泽仁, 陈光华, 黄显宾, 蔡红春, 李晶, 肖沙里. 双通道共轴聚焦型X射线晶体光谱仪[J]. 光学学报, 2012, 32(4): 0430001. Yang Qingguo, Li Zeren, Chen Guanghua, Huang Xianbin, Cai Hongchun, Li Jing, Xiao Shali. Dual-Channel, Co-axial, Focusing X-Ray Crystal Spectrograph[J]. Acta Optica Sinica, 2012, 32(4): 0430001.

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