{"paper":{"title":"Alternative Lattice Design for the STCF Collider Rings","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"An alternative one-fold lattice for the STCF collider reaches 1×10^{35} cm^{-2}s^{-1} luminosity at 2 GeV with a 600-second Touschek lifetime.","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Anton Bogomyagkov, Demin Zhou, Jingyu Tang, Linhao Zhang, Penghui Yang, qing Luo, Sangya Li, Tao Liu, Ye Zou","submitted_at":"2026-05-18T14:07:34Z","abstract_excerpt":"The Super Tau-Charm Facility (STCF) is a proposed high-luminosity electron-positron collider operating in the beam energy range of 1-3.5 GeV, targeting a peak luminosity larger than $0.5\\times10^{35}\\ \\mathrm{cm^{-2}s^{-1}}$ at 2 GeV. In this regime, the combination of beam-beam interaction in the crab-waist scheme and low beam energy imposes stringent constraints on dynamic aperture, momentum acceptance, and Touschek lifetime. In this paper, we present an alternative one-fold lattice design for the STCF collider rings, developed within a systematic optimization framework. The approach consist"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The optimized lattice achieves the more ambitious luminosity of 1×10^{35} cm^{-2}s^{-1} while maintaining a Touschek lifetime of about 600 s at 2 GeV, with sufficient dynamic aperture and momentum acceptance for stable operation.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The design assumes that the crab-waist scheme combined with local chromatic correction in the interaction region will sufficiently suppress beam-beam driven instabilities and allow the global nonlinear optimization to converge to a stable solution without unforeseen collective effects dominating at the target currents.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Alternative lattice for STCF achieves 1e35 cm^{-2}s^{-1} luminosity and 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