A ring-based Higgs factory with a center-of-mass energy of 240 GeV residing in the existing LEP tunnel is studied at a level of concrete lattice. We found that low-emittance lattice is essential to mitigate the effect of beamstrahlung on the beam lifetime. To achieve a luminosity of 1.0×1034cm−2s−1, we simplified final focusing system and improved its momentum aperture by a factor of 5 to 2.5%.
@article{arxiv.1309.2602,
title = {A Feasibility Study of an e+e- Ring Collider for Higgs Factory},
author = {Yunhai Cai and Alex Chao and Yuri Nosochkov and Uli Wienands and Frank Zimmermann},
journal= {arXiv preprint arXiv:1309.2602},
year = {2013}
}