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TY - CONF AU - Nikitin, S.A. ED - Li, Ying-ying ED - Li, Lu ED - Schaa, Volker RW TI - Polarization Issues 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 - We study a possibility of obtaining transversely polarized electron-positron beams at the CEPC collider. At the beam energy of 45 GeV, this requires the use of the special wigglers to speed up the radiative self-polarization process. A numerical estimation of the depolarizing effect of the collider field errors is made, taking into account the modulation of the spin precession frequency by synchrotron oscillations. In addition, we consider an alternative possibility of obtaining polarization by accelerating the polarized particles in the booster and then injecting them into the main ring. This option saves time spent on the polarization process, and is also crucial for obtaining longitudinal polarization. PB - JACoW Publishing CP - Geneva, Switzerland SP - 182 EP - 189 KW - polarization KW - resonance KW - wiggler KW - booster KW - electron DA - 2019/04 PY - 2019 SN - 978-3-95450-216-5 DO - DOI: 10.18429/JACoW-eeFACT2018-WEXAA02 UR - http://jacow.org/eefact2018/papers/wexaa02.pdf ER -