云台太阳黑子磁场观测装置的一种改进方法

A Method for Improving the Observational Device of the Magnetic Field of A Sunspot at the Yunnan Observatory

本文简介了云南天文台太阳光球黑子活动区磁场观测装置改进后的仪器基本结构。使用表明:磁场观测能同二维多波段光谱照相扫描观测准同步(或准同时)进行;被测磁场为日面上同一点的真实值;提高了磁场测量精度和时间分辨率;所得资料能用计算机快速处理。

A method for improving the observational device of the magnetic field of a photospheric sunspot is proposed for the two-dimensional multi-waveband solar spectrograph at the Yunnan Observatory. The improved device has been put into operation and the observed results shows that: ( 1 ) The observation of the magnetic field of a sunspot (A line of Fe I 6173A which is sensitive to the magnetic field is used) can be carried out quasi-synchronously (or quasi-simulta-neously) with that of the scanning photograph of the multi-waveband two-dimensional solar spectrograph. (2) The split distance between the gravity centers of the lines which are sensitive to the magnetic fields indicates the real strength of the longitudinal magnetic field at the corresponding point in the solar disc. ( 3 ) The measurable value of the magnetic field is at least about 100 Gauss. ( 4 ) The data obtained with the device can be treated rapidly with a computer.