Multi-port cavity model and low-level RF systems design for VHF gun

doi:10.1007/s41365-019-0711-2

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Multi-port cavity model and low-level RF systems design for VHF gun
	Liu, K ; Li, L ; Wang, C ; Gu, Q ; Zhao, MH
刊名	NUCLEAR SCIENCE AND TECHNIQUES
	2020
卷号	31 期号:1 页码:-
ISSN号	1001-8042
DOI	10.1007/s41365-019-0711-2
文献子类	期刊论文
英文摘要	Very high frequency (VHF) photocathode guns have excellent performance and are being increasingly selected as electron sources for high-repetition-rate X-ray free-electron lasers. As a highly loaded quality factor cavity, the VHF gun requires high stability in the amplitude and phase of the cavity field. However, the gun is microwave powered by two solid-state power sources through two separate power couplers. The input difference between the two power couplers will influence the stability of the cavity field. To systematically study this influence and obtain measurement formulae, a multi-port VHF gun LCR circuit model is built and analyzed. During the warm-up condition, the cavity structure will be deformed due to the large-scale change in the cavity temperature. Then, the deformation will result in cavity resonant frequency changes. To prevent the mechanic tuner from suffering damages due to the frequent and long-distance movement for correcting the cavity resonant frequency, a self-excited loop (SEL) control system is considered for changing the loop phase and make the loop frequency follow the resonant frequency. In this study, a steady-state model of the VHF gun cavity is built for obtaining the optimal input coupler coefficient and the stability requirement of the forward voltage. Then, the generator-driven resonator and SEL control system, which combine with the VHF multi-port modeling, are modeled and simulated. The simulated results show that the SEL system can perfectly operate in the process of condition and warm-up.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/33023]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201204, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, K,Li, L,Wang, C,et al. Multi-port cavity model and low-level RF systems design for VHF gun[J]. NUCLEAR SCIENCE AND TECHNIQUES,2020,31(1):-.
APA	Liu, K,Li, L,Wang, C,Gu, Q,&Zhao, MH.(2020).Multi-port cavity model and low-level RF systems design for VHF gun.NUCLEAR SCIENCE AND TECHNIQUES,31(1),-.
MLA	Liu, K,et al."Multi-port cavity model and low-level RF systems design for VHF gun".NUCLEAR SCIENCE AND TECHNIQUES 31.1(2020):-.