“阳”加速器Z箍缩实验用透射光栅谱仪
Transmission grating spectrometer for Z-pinch experiment on Yang accelerator
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摘要: 研制的透射光栅谱仪配备了高线密度金透射光栅作为分光元件，使用X光CCD记录时间积分光谱图像。在谱仪结构中引入了两个相互垂直的狭缝，一个用于实现光谱图像的1维空间分辨；另一个与光栅相配合后具有准直入射X光的作用，用来提高谱仪的分辨力。使用该谱仪对“阳”加速器Z箍缩实验的X光辐射进行了测量。当使用铝丝阵作为负载时，测得了铝的K壳层辐射和类锂离子的线谱辐射，并且通过将光谱图像与X光针孔相机的测量结果相比较，观察到了“热点”区域放出的较强的K壳层辐射。Abstract: A transmission grating spectrometer has been fabricated for the study of X-ray radiations from Z-pinch plasma. The spectrometer contains a 3 333 lp/mm gold transmission grating and an X-ray CCD to record time-integral spectral images. Two slits are employed in the spectrometer. One is used for 1D space resolving and the other, working together with the grating’s entrance slit, can collimate the incident X-rays and thus improve the spectral resolution of the spectrometer. The spectrometer has been used in Z-pinch experiments performed on Yang accelerator. When using Al wire arrays as Z-pinch loads, the Al K-shell lines and lines from Li-like ions were observed. In addition, by comparing the spectral image with the image obtained from an X-ray pinhole camera, the K-shell radiations emitted
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Key words:
- transmission grating spectrometer /
- z-pinch diagnosis /
- al wire array /
- k-shell radiation
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