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。
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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第3期685-688,共4页
Chinese Journal of Lasers
基金
国家自然科学基金(10576041)
国家863计划资助课题
关键词
光谱学
等离子体光谱学
椭圆弯晶谱仪
丝阵Z箍缩
X射线诊断
spectroscopy
plasma spectroscopy
elliptically bent crystal spectrometer
wire array Z-pinch
X-ray diagnosis
