高亮度光注入器中阴极横向动量单次成像
加速器物理
2020-04-29 v1
摘要
在最先进的光注入器电子源中,光发射的热发射度主导了最终注入器发射度。因此,低发射度阴极的研制与诊断十分重要。高梯度枪的常规热发射度测量耗时较长,因此在 photocathode 寿命期间,热发射度不像量子效率那样被频繁测量,尽管二者对光注入器优化都至关重要。本文提出一种针对阴极 RF 枪的光发射横向动量(即单位 rms 激光光斑尺寸的热发射度)单次测量方法。通过调节枪螺线管聚焦,将阴极处电子的横向动量成像到下游荧光屏,从而实现对光电子横向动量 rms 值及详细能谱的单次测量。本文报道了相关模拟与原理验证实验。
引用
@article{arxiv.2002.06837,
title = {Single shot cathode transverse momentum imaging in high brightness photoinjectors},
author = {Peng-Wei Huang and Houjun Qian and Ye Chen and Daniele Filippetto and Matthias Gross and Igor Isaev and Christian Koschitzki and Mikhail Krasilnikov and Shankar Lal and Xiangkun Li and Osip Lishilin and David Melkumyan and Raffael Niemczyk and Anne Oppelt and Fernando Sannibale and Hamed Shaker and Guan Shu and Frank Stephan and Chuanxiang Tang and Grygorii Vashchenko and Weishi Wan},
journal= {arXiv preprint arXiv:2002.06837},
year = {2020}
}
备注
9 pages, 15 figures