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由电子或离子照射而发射二次电子的应用研究,随着图象显示技术和真空技术等的发展又重新得到重视,目前正在进行相当广泛的研究.虽然二次电子发射的应用按二次电子发射现象侧重面的不同可分为若干类型,但是基本上都希望得到二次电子放射比大的材料.因此,一直在为发现二次电子放射比大的材料而多方探索.使用通常的单晶或多晶的固体材料时,由于受到某种程度上的限制,不能获得高的放射比.解决这个问题主要有二种方法.其
Applied research on the emission of secondary electrons by the irradiation of electrons or ions has been reevaluated with the development of image display technology and vacuum technology and is currently undergoing quite extensive research.Although the application of secondary electron emission Emission phenomenon focuses on the surface of different types can be divided into several types, but basically want to get a large secondary electron emission ratio of the material.Therefore, has been to find the secondary electron emission ratio of the material and multi-exploration.Use the usual single crystal Or polycrystalline solid material, due to a certain degree of restrictions, can not get high radiation ratio.There are two main ways to solve this problem.It