双透射峰钠原子滤光器在太阳速度场观测中的应用

Application of Dual-Peak-Transmission Sodium FADOF in Solar Velocity Field Observation

法拉第反常色散原子滤光器作为一种精密光谱仪器,具有光谱分辨力高、光谱稳定性好等优点。探讨了利用双透射峰钠原子滤光器进行高分辨力太阳多普勒观测的方法,在此基础之上开发了原子滤光器透射谱型理论模拟软件,研制出双透射峰钠原子滤光器样机并对其进行了透射谱型测试。测试结果表明,理论模拟的透射谱型与实验测试结果符合良好,在双峰间距、透射带宽等参数方面基本满足太阳多普勒观测的要求,为太阳观测提供另一种有效手段。

Faraday anomalous dispersion optical filter（FADOF） is a precision spectrometer with high spectral resolution and spectral stability.This article analyzes the method using dual-peak-transmission FADOF for solar Doppler observation,which develops FADOF transmission spectrum calculating software,and carries out the prototype experiment of sodium atoms FADOF with bimodal type transmission spectrum.Experiment shows good agreement between experimental results and theoretical ones,and the parameters meet the requirement of solar Doppler observation.