90 °球偏折分析器在非对称带电位形下的研究
Investigation of a 90 Degree Spherical Deflecting Analyzer Operated in an Asymmetrically Charged Configuration
摘要：
本文用成象矩阵理论研究了90 °球偏转分析器（SDA-90）的电子光学。作为UTA中微子实验的预分析器，高透射率和合理的能量分辨率是优化的选择。源通过分析仪的放大率在确定能量分辨率方面起着关键作用。成像矩阵方法提供了图形信息，以促进这种评价。我们可以证明，在分析器不对称带电的情况下，图像的旋转有助于提高传输概率和分辨率。用远焦电子枪对数值结果进行了检验，并对横向聚焦行为进行了研究。
英文摘要：
The electron optics of a 90 degree spherical deflecting analyzer (SDA-90) is investigated with an imaging matrix formalism. As a preanalyzer in the UTA-neutrino experiment, high transmission and reasonable energy resolution are the choices of optimization. The magnification of the source through the analyzer plays the key role in determining the energy resolution. The imaging matrix approach provides graphical information to facilitate such an evaluation. We can demonstrate that in case where the analyzer is asymmetrically charged, the rotation of the image helps increase both transmission probability and resolution. A telefocus electron gun is used to check the numerical result, and to investigate the transverse focusing behavior.
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