由于超高真空获得的方便,一般都将场致显微管(FEM)制成不可拆的封闭结构(玻璃外壳),这对经常更换针尖样品的研究工作是不方便的,因此早有人提出FEM应制成可拆式结构。现将我们研制的一种玻璃-金属混合结构的可拆式场致显微管及其实验结果作扼要介绍。一、可拆式FEM管结构图1为可拆式FEM管结构图。它由三个部件组成:玻壳、三通管道(管身)和尾部阴极〔图2 (a),(b),(c)〕。玻壳采用标准示波管壳(5号玻璃)。玻壳内壁先均匀涂一层二氧化锡透 Due to the convenience of ultrahigh vacuum, field microscopic tube (FEM) is usually made of non-detachable closed structure (glass housing), which is often inconvenient for the replacement of the tip sample research work, so long ago proposed FEM Should be made of removable structure. Now we have developed a glass - metal hybrid structure detachable field microscopic tube and its experimental results for a brief introduction. First, detachable FEM pipe structure Figure 1 is a detachable FEM pipe structure. It consists of three components: a glass bulb, a tee pipe (tube) and a tail cathode [Figure 2 (a), (b) and (c)]. Glass shell with a standard oscilloscope (5 glass). Glass bulb wall uniformly coated with a layer of tin dioxide through