首页|Dual-mode normal conducting very high frequency gun study for continuous-wave high brightness photoinjector
Dual-mode normal conducting very high frequency gun study for continuous-wave high brightness photoinjector
Jiang, Prof. Zenggong Gu, Prof. Qiang Zhu, Dr. Zihan Zhang, Prof. Meng Qian, Dr. Houjun Shu, Dr. Guan
Dual-mode normal conducting very high frequency gun study for continuous-wave high brightness photoinjector
Dual-mode normal conducting very high frequency gun study for continuous-wave high brightness photoinjector
摘要
The scientific community's escalating interest in high-repetition rate free electron laser facilities has sparked a growing demand for the development of high-brightness, high-repetition rate electron sources. In the present paper, we propose a novel design of a continuous-wave (CW) very high frequency (VHF) normal conducting radio frequency (NCRF) gun which operates with two distinct accelerating modes simultaneously. An automatic cavity shape optimization approach, based on multi-objective genetic algorithms (MOGA), is implemented to optimize and study the characteristics of this dual-mode VHF NCRF gun. The study reveals that the dual-mode electron gun significantly reduces the feeding power by about 25% with the fixed electric field gradient at the cathode. Under the given conditions, it can achieve the performance with an accelerating voltage of 1.4 MV and an electric field gradient of 31 MV/m at the cathode. Additionally, a beam dynamics study of the dual-mode electron gun is carried out, demonstrating its potential for generating high-brightness electron beams.