论文标题
基于碱性抗乙酰胺光阴极的新自旋偏振电子源
New spin-polarized electron source based on alkali-antimonide photocathode
论文作者
论文摘要
基于检测到的光旋转方向效应和DFT带结构计算，预测了碱抗氨基酯半导体阴极的新的旋转光发射特性。使用这些结果，NA $ _2 $ ksb/cs $ _3 $ sb异质结构被设计为自旋极化电子源，并将其与Al $ _ {0.11} $ ga $ _ {0.89} $一起作为旋转驱动器和空间分辨率。在NA $ _2 $ ksb/cs $ _3 $ SB光电模座中，通过检测高度发光偏振和光电量电子的高极化来建立自旋依赖的光发射特性。已经发现，多烷烃光电极可以为电子束提供非常接近电子热能施加的限制的电子束。已经提出了用于加速器的自旋偏振电子的真空片剂型源，可以排除光电座生长室以用于光注射器。
New spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations. Using these results, the Na$_2$KSb/Cs$_3$Sb heterostructure is designed as a spin-polarized electron source in combination with the Al$_{0.11}$Ga$_{0.89}$As target as a spin-detector with spatial resolution. In the Na$_2$KSb/Cs$_3$Sb photocathode, spin-dependent photoemission properties were established through detection of high degree of photoluminescence polarization and high polarization of the photoemitted electrons. It was found that the multi-alkali photocathode can provide electron beams with emittance very close to the limits imposed by the electron thermal energy. The vacuum tablet-type sources of spin-polarized electrons have been proposed for accelerators, that can exclude the construction of the photocathode growth chambers for photoinjectors.
