Transverse mode-coupling instability with longitudinal impedance

作     者：Hai-Sheng Xu Chun-Tao Lin Na Wang Jing-Ye Xu Yuan Zhang 

作者机构：Key Laboratory of Particle Acceleration Physics and TechnologyInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of SciencesBeijing 100049China Institute of Advanced Science FacilitiesShenzhen 518107GuangdongChina 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2024年第35卷第6期

页      面：40-53页

核心收录：

学科分类：07[理学] 0827[工学-核科学与技术] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(No.12375149) the National Key R&D Program of China(No.2022YFA1603401) the Innovation Study of the IHEP 

主　　题：Transverse mode-coupling instability Longitudinal impedance 

摘      要：Transverse mode-coupling instability(TMCI)is a dangerous transverse single-bunch instability that can lead to severe par-ticle *** mechanism of TMCI can be explained by the coupling of transverse coherent oscillation modes owing to the transverse short-range wakefield(i.e.,the transverse broadband impedance).Recent studies on future circular colliders,e.g.,FCC-ee,showed that the threshold of TMCI decreased significantly when both longitudinal and transverse impedances were *** performed computations for the circular electron-positron collider(CEPC)and observed a similar *** studies on the influence of longitudinal impedance on the TMCI threshold were *** concluded that the imaginary part of the longitudinal impedance,which caused a reduction in the incoherent synchrotron tune,was the primary reason for the reduction in the TMCI ***,the real part of the longitudinal impedance assists in increasing the TMCI threshold.