【摘要】 为了观测太阳耀斑高速电子轰击色球,紫金山天文台赣榆观测站将原精细结构望远镜改造为高速CCD精细结构望远镜,拍摄到局部H_α活动区．在光学系统里增加缩焦器,引进干涉偏振滤光片后,高速CCD就能记录H_α各波段的单色像．经过1999年至2004年的反复试验和改进,目前H_α图像的空间分辨率己达1个角秒,时间分辨率为每秒钟30至40帧图像．2004年11月观测到一个M1．1级耀斑,我们将H_α紫移(H_α-0．5(?))高速图像和硬X-射线暴、射电微波暴比较,结果发现：初始的耀斑成对亮点在上升相相互靠近,特别是微波暴源也显出类似的靠近运动,以前从未观测到这种现象,它可解释为磁弧脚根沿中性线的剪切运动．更多还原

【Abstract】 For the purpose of observing high - speed electrons bombarding solar chrom- csphere,the original fine H_α-heliograph at Gan-Yu station has been reformed,using CCD- fast terminal to record local H_α-active regions.Inserting a focus - shorten device in the original optical system and introducing an optical - interference slate - filter,we obtain various images in H_α-spectroscopic region through the fast- CCD.After elaborated testing and improvement during the year 1999—2004,this reformation is completed with a good result:the space - resolution attains 1 arc second and temporal resolution is better than 40 frames per second.A class - M1.1 flare in November,2004 is observed in high cadence H_α-0.5(?) heliograms.Comparing it with hard X-ray and microwave burst observations, we discovered that a pair of conjugated flare H_α-bright points approach one to another, not the usual way - move apart.Such approaching movement can be explained by bright point’s moving along the magnetic neutral line.更多还原