This paper introduces the principles of field ion emission at first, and then explains the construction and work principles of FID.
本文先介绍场离子发射的原理，然后介绍FID的结构及工作原理。
The field ion image of tungsten with resolution of atomic level has been obtained and the surface structure of tungsten has been analysed.
取得具有原子级分辨的场离子像，并对钨场离子像反映的晶体表面结构进行了分析。
Seen here on June 13th from southern New Mexico, this Comet McNaught's long ion tail sweeps across the telescopic field of view (a negative image is inset).
这是6月13日新墨西哥南部所见，麦克·诺特的长离子尾扫过望远镜的视野，插图是负片。
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