中国激光, 2010, 37 (3): 685, 网络出版: 2010-03-11   

金丝Z箍缩等离子体X射线椭圆弯晶谱仪研究

Elliptical Crystal Spectrometer Researched for Z-Pinch Plasma X-Ray by Using Au-Wire Arrays
作者单位
1 重庆大学 光电技术及系统教育部重点实验室,重庆 400030
2 重庆工商大学 重庆市发展信息管理工程技术研究中心,重庆 400067
3 中国工程物理研究院流体物理研究中心,四川 绵阳 621900
摘要
为了测量波长在0.2-2 nm范围内的金丝内爆X射线的空间分辨光谱,利用椭圆自聚焦原理,研制了一种椭圆晶体谱仪。季戊四醇(PET)(002)椭圆弯晶作为色散分析元件,其离心率为0.9480,焦距为1348 mm,布拉格角范围为30°-67.5°。设计了半径为50 mm的半圆型胶片暗盒,内装X光胶片接收光谱信号。在“阳”加速器装置上先沿X射线水平方向进行摄谱实验,然后将谱仪沿X射线轴旋转90°,再进行金丝内爆实验。两次实测金丝内爆等离子体X射线的跃迁光谱相符,谱线分辨率(λ/Δλ)达300-600。实验结果表明该谱仪适合金丝内爆等离子体X射线的光谱学研究。
Abstract
To diagnose the presence of electron beams in Z-pinch plasma in spectral range of 0.2-2 nm,two channel X-ray spectrometers respectively using have desirable properties for applications requiring broad spectral coverage,good spectral resolution,and minimized source broadening. A new space resolved focusing elliptical curved crystal spectrometer has been developed and applied to diagnose X-ray of Z-pinch plasma based on focusing spectrograph spatial resolution (FSSR). An elliptical PET(002)crystal was employed with 1348 mm focal length,0.9480 eccentricity and 30°-67.5° Bragg angle. The first experiment was carried out on the Yang accelerator and aimed to investigate the characteristics of high-density plasma and the second did with the spectrometer rotated 90°. X-ray spectra in an absolute intensity scale were obtained from Au-wire Z-pinch plasmas recorded by half-circle X-ray film with radius of 50 mm. It was demonstrated experimentally that the two measured wavelength were same,with spectral resolution λ/Δλ of 300-600,and that spectrograph of elliptically bent PET crystal was a good tool for diagnosing Z-pinch plasmas.

王洪建, 肖沙里, 施军, 黄显宾, 蔡红春, 徐道连. 金丝Z箍缩等离子体X射线椭圆弯晶谱仪研究[J]. 中国激光, 2010, 37(3): 685. Wang Hongjian, Xiao Shali, Shi Jun, Huang Xianbin, Cai Hongchun, Xu Daolian. Elliptical Crystal Spectrometer Researched for Z-Pinch Plasma X-Ray by Using Au-Wire Arrays[J]. Chinese Journal of Lasers, 2010, 37(3): 685.

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