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TY - UNPB AU - He, T.L. AU - Bai, Z.H. AU - Feng, G.Y. AU - Li, W.M. AU - Li, W.W. AU - Wang, L. ED - Schaa, Volker RW ED - Huang, Wenhui ED - Yan, Xueqing ED - Tang, Chuanxiang ED - Li, Lu TI - Harmonic cavity dynamics studies: efficient methods and new type of Robinson instabilities J2 - presented at SAP2023, Xichang, China, 10-12 July 2023 CY - Xichang, China T2 - Symposium on Accelerator Physics T3 - 14 LA - english AB - In order to cope with the intrabeam scattering effect induced emittance growth, the Touschek scattering effect induced beam lifetime limitation and the beam-impedance coupling effect induced instability growth, harmonic cavities are used to stretch the bunch and provide Landau damping, which has become a necessary choice for modern advanced synchrotron light sources. However, harmonic cavities operated in bunch lengthening mode can cause some adverse effects such as beam loading, Robinson instability, etc., which possibly pose a limitation on the maximum bunch lengthening. This paper will report on our research progress on harmonic cavity dynamics associated with efficient methods for bunch lengthening calculation and new type of Robinson instabilities. ER -