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He II Line 4686 a as Wavelength Standard for Fourier Transform Spectrometer

机译:他II线4686a作为傅立叶变换光谱仪的波长标准

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We report the experimental work for the determination of wavelength standard to validate the measurements of Fourier transform spectrometer. A dc run hollow-cathode discharge with two anodes on either sides of a cathode is designed for the precise measurements of He II lines at 4686 ?. The Doppler width and ion-drift shift were measured by using each anode alternatively which changes the direction of electric field from 0o to 180o. The stability of He II line has been investigated and comparable precision with respect to previous work has been obtained. Excellent wavelength accuracy with relative uncertainty in line position of the order of 108 is within reach of single point calibration factor.
机译:我们报告确定波长标准的实验工作,以验证傅里叶变换光谱仪的测量结果。阴极两侧各有两个阳极的直流中空阴极放电设计用于精确测量4686?He线。通过交替使用每个阳极来测量多普勒宽度和离子漂移,该阳极将电场的方向从0o更改为180o。对He II线的稳定性进行了研究,并获得了与以前工作相当的精度。单点校准系数可达到出色的波长精度,且线位置的相对不确定性约为108。

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