JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Wang, N. AU - Lin, C.T. AU - Liu, Y.D. AU - Tian, S.K. AU - Xu, H.S. AU - Zhang, Y. ED - Biagini, Maria Enrica ED - Chrin, Jan ED - Giabbai, Manuela ED - Iungo, Massimiliano ED - Schaa, Volker R.W. TI - Collective Effects Studies for CEPC J2 - Proc. of eeFACT2022, Frascati, Italy, 12-16 September 2022 CY - Frascati, Italy T2 - ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders T3 - 65 LA - english AB - The impedance model of the CEPC storage ring is updated according to the development of the vacuum components based on the circular beam pipe. With the impedance model, the single bunch and coupled bunch instabilities for different operation scenarios are investigated. Particularly, the key instability issues driven by the beam coupling impedance in the Z operation mode are discussed. The influence of the longitudinal impedance on the transverse mode coupling instability is analyzed both numerically and analytically. In addition, trapped ions can induce bunch centroid oscillation and emittance growth. The possibility of ion trapping and fast beam ion instability in the CEPC storage ring are also investigated. PB - JACoW Publishing CP - Geneva, Switzerland SP - 141 EP - 145 KW - impedance KW - vacuum KW - coupling KW - synchrotron KW - simulation DA - 2022/02 PY - 2022 SN - 2673-7027 SN - 978-3-95450-236-3 DO - doi:10.18429/JACoW-eeFACT2022-WEYAT0101 UR - https://jacow.org/eefact2022/papers/weyat0101.pdf ER -