箍缩等离子体X射线能谱诊断

X-Ray Spectral Diagnosis for Z-Pinch Plasma

为了研究和诊断箍缩聚变的聚爆靶高温等离子体内部的形状、分布及各种运动过程，基于晶体布拉格衍射，研制了新型球面弯曲晶体能谱成像系统。其核心元件是石英球面弯曲晶体（1010），弯曲半径为200mm。在中国工程物理研究院“阳”加速器上利用能谱成像系统进行了Z箍缩等离子体X射线能谱成像实验。X射线胶片得到了清晰的钛等离子体X射线能谱成像信息。对实验所得能谱信息进行分析，石英球面弯曲晶体得到等离子体X射线的能谱分辨率约为1092，与X射线能谱分辨几何模型理论值比较吻合。实验结果表明石英球面弯曲晶体可以用于X射线的能谱诊断。

In order to study and diagnose the distribution, movement process and shape of the high-temperature plasma of pellet implosion in the Z-pinch implosion, a novel spherically bent crystal imaging system has been developed based on the Bragg diffraction theory. The key component of the imaging system is the spherically bent a-quartz crystal with the radius of 200 ram. An X-ray spectral imaging experiment using spherically bent a-quartz crystal has been carried out in the ＂Yang＂ accelerator in the Chinese Academy of Engineering Physics （CAEP）. The X-ray film obtains the X-ray spectral information of Ti plasma. By analyzing the spectral information, the diagnostic result shows that the spectral resolution of the imaging system is 1092, which is consistent with theoretical value of the spectral resolution model. The imaging system meets the demand of spectral diagnosis.