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太阳高分辨率速度场观测系统可用于探测日震的活动信息,对太阳内部结构的研究具有重要意义。探讨了双峰钾原子滤光器在太阳光球层速度场观测中的应用方法,即利用法拉第反常色散原子滤光器(FADOF)的高光谱分辨率和光谱稳定性等优点,采用双峰钾原子滤光器分辨来自太阳光球层钾线(769.898nm)光谱的多普勒频移,并提出用F-P标准具对透过原子滤光器的双峰信号进行光学选支,从而获得太阳光球层多普勒速度场图像。研制出双透射峰钾原子滤光器原理样机,经测试其谱型与理论谱型符合良好,满足太阳速度场高分辨率观测的需要。将此技术方案扩展到太阳的其他谱线,可实现对太阳大气多层次速度场的同时观测。
The solar high-resolution velocity field observation system can be used to detect the activity information of diurnal events and is of great significance for the study of the internal structure of the sun. The application of BFS potassium atom filter in the observation of the velocity field of the solar light sphere was discussed. By using the advantages of high spectral resolution and spectral stability of the FADOF (atomic dispersion filter) The atomic filter resolves the Doppler shift in the spectrum of the potassium line (769.898 nm) from the solar layer and proposes the optical branching of the bimodal signal through the atomic filter with the FP etalon to obtain sunlight Ball Doppler velocimetry image. The principle prototype of dual-pass potassium potassium filter has been developed. It has been tested that its spectral type and theoretical spectral type are in good agreement with the needs of high-resolution solar velocity field observation. Extending this technical solution to other solar spectrum enables simultaneous observation of multi-level velocity fields in the solar atmosphere.