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多年来人们在不同的实验室研究了S型光电阴极的若干物理概念。在研究中,光学法是非常重要的。事实上,光学测量能够应用于碱金属锑光电阴极管内沉积的研究。例如,在制备阴极过程中测量薄层的光学反射(或透射)。从光学反射能得到光电阴极在生长过程中某些物理参数的信息。 (1) 光电阴极的厚度能够连续测量,因此薄层的生长速度能受控。 (2) 同时可以获得一些综合性信息。能够分辨如SbNa_3和SbNa_2K两相的混合物以及在SbNa_2K层之上纯锑或SbNa_3的沉积。此外用这种方法能够观察到两种碱金属在混合物中的化学置换。对于研究各种碱金属锑光电阴极,测量光学反射(透射)是控制薄层的生长和确保重复性的有价值的手段,作为光电发射的辅助测量一般用来监控S型光电阴极的生长。
Over the years, people have studied several physical concepts of S-type photocathodes in different laboratories. In the study, the optical method is very important. In fact, optical measurements can be applied to the deposition of antimony metal cathodes. For example, the optical reflection (or transmission) of the thin layer is measured during the preparation of the cathode. From the optical reflection can be photocathode obtained in the growth of certain physical parameters of the information. (1) The thickness of the photocathode can be continuously measured, so that the growth rate of the thin layer can be controlled. (2) At the same time you can get some comprehensive information. The mixture of two phases, SbNa_3 and SbNa_2K, and the deposition of pure antimony or SbNa_3 on the SbNa_2K layer can be distinguished. In addition, chemical substitutions of the two alkali metals in the mixture can be observed with this method. For the study of various alkali metal antimony photocathodes, measuring optical reflections (transmission) is a valuable tool for controlling the growth and ensuring repeatability of thin layers, and as an auxiliary measure for photoemission, it is generally used to monitor the growth of S-type photocathodes.