The resonant frequency measurement method for superconducting cavity with Lorentz force detuning

doi:10.1016/j.nima.2021.165085

	The resonant frequency measurement method for superconducting cavity with Lorentz force detuning
	Ma, Jinying 1; Huang, Guirong 1,2; Gao, Zheng 2; Jiang, Tiancai 2; Xue, Zongheng 2; Zhu, Zhenglong 2; Sun, Liepeng 1,2; Wu, Andong 2
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
	2021-03-21
卷号	993 页码:6
关键词	Superconducting cavity Resonance frequency Lorentz force detuning
ISSN号	0168-9002
DOI	10.1016/j.nima.2021.165085
通讯作者	Gao, Zheng(gaozheng@impcas.ac.cn)
英文摘要	The precise measurement of resonance frequency is very important to tune the cavity and stabilize the RF field. The minimal-reflection method is usually used to measure the cavity resonance frequency, but the accuracy may not meet the stability requirement for the superconducting cavity with narrow bandwidth. The falling edge method with high precision has been used for the resonance frequency measurement of the normal conducting cavity, but it cannot be used directly for the superconducting cavity due to the effect of Lorentz Force Detuning (LFD). This paper presents the solution for applying the falling-edge method to measure the resonance frequency of superconducting cavity with LFD. The periodic iteration algorithm is developed to calculate the frequency detuning and phase shift caused by the dynamic Lorentz Force within RF falling-edge. The phase shift due to the deviation of initial resonance frequency is derived by subtracting the LFD item from the phase measurement, and the initial resonance frequency can be determined finally. The method has been tested on the superconducting cavity at CAFE facility, and the effectiveness has been demonstrated.
资助项目	National Natural Science Foundation of China[E0114303] ; Scientific instrument development project of Chinese Academy of Sciences[E028861Y]
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000628810600010
资助机构	National Natural Science Foundation of China ; Scientific instrument development project of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137712]
专题	中国科学院近代物理研究所
通讯作者	Gao, Zheng
作者单位	1.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Ma, Jinying,Huang, Guirong,Gao, Zheng,et al. The resonant frequency measurement method for superconducting cavity with Lorentz force detuning[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2021,993:6.
APA	Ma, Jinying.,Huang, Guirong.,Gao, Zheng.,Jiang, Tiancai.,Xue, Zongheng.,...&Wu, Andong.(2021).The resonant frequency measurement method for superconducting cavity with Lorentz force detuning.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,993,6.
MLA	Ma, Jinying,et al."The resonant frequency measurement method for superconducting cavity with Lorentz force detuning".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 993(2021):6.