This study reports on the development of an L-band photocathode RF gun for delivering high brightness electron beams with high average power. We designed and fabricated an L-band normal conducting photocathode RF gun at Tsinghua University. RF performance is improved after optimization of the cavity geometry referring to the PITZ gun. A newly designed solenoid that encloses the entire cavity body has been designed to suppress the emittance growth, and dynamic simulation shows a lower transverse emittance. A coupled 3D RF-thermal-structure analysis is carried out to investigate the thermal-induced effects under the operating condition. Cold test results are also presented in this paper. This gun is now under commissioning and beam tests will be discussed in future works.

这项研究报告了L波段光电阴极RF枪的开发情况，该枪可以传送具有高平均功率的高亮度电子束。我们在清华大学设计和制造了L波段正常传导光电阴极RF枪。参照PITZ枪优化型腔几何形状后，RF性能得以改善。设计了一种新的螺线管，它包围了整个腔体，以抑制发射率的增长，而动态仿真显示出较低的横向发射率。进行了耦合的3D RF热结构分析，以研究工作条件下的热诱导效应。本文还介绍了冷测试结果。该枪目前正在调试中，射束测试将在以后的工作中进行讨论。