A phenomenological model of the fundamental power coupler for a superconducting resonator  

作　　者：Ran Huang Yuan He 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Nuclear Science and Techniques》2023年第5期33-46,共14页核技术（英文）

基　　金：supported by the CAS“Light of West China”Program (No.29Y936020);National Natural Science Foundation of China (No.12105331);Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDB34010102)。

摘　　要：In this study,a phenomenological model of the radio frequency(RF)behavior of a superconducting cavity fundamental power coupler is proposed by analyzing the simulation results of a transient beam-loading process in an extremely overcoupled superconducting cavity.Using this phenomenological model,the calculation of the transient reflected power from a superconducting cavity under beam loading can be mathematically simplified to algebraic operations without solving the differential equation governing the transient beam-loading process,while maintaining the calculation accuracy.Moreover,this phenomenological model can facilitate an intuitive understanding of the significant surge in the time evolution of reflected power from a superconducting cavity in certain beam-loading processes.The validity of this phenomenological model was carefully examined in various beam-loading processes and cavity conditions,and the method based on this phenomenological model was utilized in the transient RF analysis of the superconducting cavity system of the CAFe Linac,achieving satisfactory results.

关 键 词：Power coupler Reflected power Superconducting cavity Beam loading 

分 类 号：TN622[电子电信—电路与系统]