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TY - CONF AU - Yu, C.H. AU - Wang, D. AU - Wang, N. AU - Wang, Y. AU - Wu, J. AU - Zhang, Y. ED - Li, Ying-ying ED - Li, Lu ED - Schaa, Volker RW TI - Some Issues on Beam-beam Interaction at CEPC J2 - Proc. of eeFACT2018, Hong Kong, China, 24-27 September 2018 CY - Hong Kong, China T2 - ICFA ABDW on High Luminosity Circular e$^+$e$^-$ Colliders T3 - 62 LA - english AB - In this paper, the beam-beam study in CEPC CDR is briefly introduced. Some issues related with beam-beam interaction will be emphasized. The bunch lengthening due to impedance and beamstrahlung is simulated in a more self-consistent method. It is found that there exist very narrow stable working point space at W-mode during the CDR design study. We’ll show wider tune scan result. It is found that there exist some disagreement between dynamic aperture and beam lifetime. We try to define the so-called diffusion rate map to explain the cause. Some initial result for different lattice solution is shown. PB - JACoW Publishing CP - Geneva, Switzerland SP - 116 EP - 120 KW - impedance KW - luminosity KW - dynamic-aperture KW - simulation KW - factory DA - 2019/04 PY - 2019 SN - 978-3-95450-216-5 DO - DOI: 10.18429/JACoW-eeFACT2018-TUYBA04 UR - http://jacow.org/eefact2018/papers/tuyba04.pdf ER -