Photocathode quantum efficiency mapping at high resolution using a digital micromirror device
Photocathode quantum efficiency mapping at high resolution using a digital micromirror device
复制标题
使用数字微镜器件进行高分辨率光电阴极量子效率映射
DOI：
10.1103/physrevstab.16.062802
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发表时间：
2013
影响因子：
--
通讯作者：
S. A. Khan
中科院分区：
文献类型：
--
作者：
B. Riddick;E. Montgomery;R. Fiorito;Hao Zhang;A. Shkvarunets;Z. Pan;S. A. Khan
电子束的质量从根本上受到其阴极属性的限制。光电阴极的发射可能很明亮，但不一定均匀。通过选择性照射阴极表面生成的量子效率（QE）图揭示了这种不均匀性。本文描述了一个原理验证实验，其中使用数字微镜设备生成高分辨率的 QE 图。我们展示了比激光光栅扫描报告的最佳结果有了显着的改进。
An electron beam’s quality is fundamentally limited by its attributes at the cathode. The emission from photocathodes can be bright, but not necessarily uniform. Quantum efficiency (QE) maps generated by selectively illuminating the cathode surface reveal this nonuniformity. In this paper a proof-of-principle experiment is described in which a high resolution map of the QE is generated using a digital micromirror device. We show a substantial improvement over the best results reported for laser raster scanning.