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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。
A two-channel coaxial focal crystal spectrometer for Z-pinch plasma X-ray spectroscopy was developed. The spectrometer uses a uniform dispersion (ie, line dispersion rate constant) and spherical mica crystals as two-channel X-ray dispersive element, located on the central axis of the dual film cassette as a detector, in the same spectral range at the same time to obtain Z band Reduced plasma time integral spectroscopy. A Z-pinch implosion spectroscopy experiment was carried out on the “Yang” accelerator of the Chinese Academy of Engineering Physics, and the hydrogen-like and helium-like spectral lines of the Z-pinched aluminum filament plasma were obtained for both channels respectively. The experimental results show that the spectral distribution of the uniform dispersion channel follows the uniform dispersion condition, and the experimentally obtained line dispersion rate agrees well with the design value with the maximum relative error of 3.48%. Compared with the spherical crystal channel, it can be more easily and accurately identified And processing the spectrum, has an advantage in identifying and analyzing unfamiliar complex spectral components.