热离子发射
阴极
肖特基效应
肖特基二极管
场电子发射
电子
分辨率(逻辑)
阴极射线
材料科学
热阴极
领域(数学)
光电子学
冷阴极
肖特基势垒
光学
物理
化学
二极管
核物理学
物理化学
人工智能
纯数学
计算机科学
数学
标识
DOI:10.1016/0304-3991(89)90278-7
摘要
An estimate is made of the characteristics of some cathodes (thermionic and field emission) in an ultra-high-spatial-resolution electron beam column. It is shown that thermionic cathodes provide an order of magnitude less current than a field emission or an extended Schottky cathode in a 100 keV system at 0.5 nm resolution. It follows that field or extended Schottky mission cathodes should be the cathodes of choice for ultra-high-resolution applications. A comparison of the properties of cold, thermal field and extended Schottky emission cathodes is given.
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