中国激光, 2012, 39 (2): 0215003, 网络出版: 2012-01-11   

基于对数螺线晶体Z箍缩铝等离子体单色成像研究

Monochromatic Imaging of Z-Pinch Al Plasma Based on the Logarithmic Spiral Crystal
作者单位
1 重庆大学光电工程学院 光电技术及系统教育部重点实验室, 重庆 400030
2 中国工程物理研究院流体物理研究中心, 四川 绵阳 621900
摘要
研究了一种对数螺线柱面晶体配接针孔对Z箍缩铝等离子体进行单色谱成像的摄谱成像仪,摄谱仪具有结构简单、外形尺寸紧凑的特点。由于对数螺线晶体的保角特性,摄谱成像仪可在较大视场范围内对Z箍缩内爆等离子体进行单色谱成像。在“阳”加速器上,针对Z箍缩铝等离子体K壳层的X射线辐射进行了成像实验,得到了铝丝阵内爆等离子体的类氢(1727.7 eV)和类氦线(1588.3 eV)单色图像。在箍缩单色图像上观察到了磁瑞利泰勒不稳定性引起的“热点”及内爆不稳定性造成的螺旋形结构,反映了等离子体的内爆形态,为进一步理解Z箍缩物理过程和确定等离子体的辐射特性提供了参考。
Abstract
A new type monochromatic X-ray crystal spectrograph which can be used to catch the K-shell line images of the imploding aluminum wire arrays was developed. The core component of the spectrograph is the crystal analyzer which was designed to the shape of logarithmic spiral in meridian plane. By taking advantages of the logarithmic spiral, monochromatic X-ray image of Z-pinch plasma can be obtained with the imager system in large field of view. Experiments have been carried on the "Yang" accelerator. In experiment, the hydrogenlike line (1727.7 eV) and heliumlike line (1588.3 eV) images of the imploding Al wire arrays were obtained. The results showed that the spectrograph can reflect the exploding modality of Z-pinch Al plasma, and multi-hot spots due to magnetic Rayleigh-Taylor instability also appeared on the images.
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毋玉芬, 肖沙里, 阳庆国, 黄显斌, 蔡红春. 基于对数螺线晶体Z箍缩铝等离子体单色成像研究[J]. 中国激光, 2012, 39(2): 0215003. Wu Yufen, Xiao Shali, Yang Qingguo, Huang Xianbin, Cai Hongchun. Monochromatic Imaging of Z-Pinch Al Plasma Based on the Logarithmic Spiral Crystal[J]. Chinese Journal of Lasers, 2012, 39(2): 0215003.

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