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@unpublished{wang:eefact2022-tuxat0102,
author = {Y. Wang},
title = {{Investigation of Arc Region Lattice for the Compatible Modes of CEPC Collider Ring}},
% booktitle = {Proc. eeFACT'22},
booktitle = {Proc. ICFA Adv. Beam Dyn. Workshop High Luminosity Circular e+e- Colliders (eeFACT'22)},
language = {english},
intype = {presented at the},
series = {ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders},
number = {65},
venue = {Frascati, Italy},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {02},
year = {2022},
note = {presented at eeFACT'22 in Frascati, Italy, unpublished},
abstract = {{The FODO cell structure is chosen to provide a large filling factor of dipoles for the arc region of a circular Higgs factory. For the Higgs and ttbar modes of CEPC collider, the phase advances of each arc cell are 90/90 degrees; For the Z mode, the phase advance was reduced to 60/60 degrees in order to suppress the microwave and transverse mode coupling instability and to increase stable tune area when considering both the beam-beam effect and longitudinal impedance. For the W mode, the phase advance was reduced as Z to increase the stable tune area. Due to the different cell phase advances of Higgs/ttbar and Z/W modes, the sextupole pairs with ’I transportation matrix are no more maintain. Thus, compatible sextupole layout for the should be provide for the Higgs/ttbar and Z/W modes. Two schemes of the arc sextupole layout are investigated for the CEPC collider arc region. One has a period of 5 cells for Higgs/ttbar modes and 7 cells for Z/W modes, which is proposed by FCC-ee. Another one has a period of 11 cells or 23 cells for all the modes. From the view point of single beam dynamics and cost of the sextupole, the two schemes will be investigated and compared.}},
}