Speaker
Description
The Super Tau-Charm Facility (STCF) is a next-generation electron-positron collider designed to explore tau-charm physics within a center-of-mass energy range of 1 to 3.5 GeV. To achieve a peak luminosity exceeding 5 × 10^34 cm^-2s^-1, STCF adopts advanced beam dynamics techniques, including large Piwinski angle collisions to mitigate the hourglass effect and crab waist correction to suppress coupling resonances. The beam size at the interaction point (IP) is compressed to sub-micron levels, making it highly sensitive to beam orbit deviations caused by ground motion and mechanical noise, which can significantly reduce luminosity. To address this challenge, we analyze the primary sources of orbit perturbations and their impact on collision performance. A high-speed beam position monitoring and real-time correction feedback system is proposed. Simulation and experimental results demonstrate the system’s feasibility and effectiveness. This study provides essential references for the design of precise beam stabilization systems at STCF and contributes to the development of IP orbit feedback technologies for future high-luminosity colliders.
Funding Agency
This work is supported by the National Key R&D Program of China (Contract No. 2022YFA1602201) and the National Natural Science Foundation of China (No. 12105278).
Footnotes
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Hai-Ping P, Yang-Heng Z, Xiao-Rong Z. Super tau-charm facility of China. Physics, 2020, 49(8): 513-524.
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High-Luminosity A, Factory H F. Conceptual Design Report. 2007.
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Raimondi P, Shatilov D N, Zobov M. Beam-beam issues for colliding schemes with large Piwinski angle and crabbed waist. arXiv:physics/0702033, 2007.
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Funakoshi Y, Fukuma H, Kawamoto T, et al. Interaction point orbit feedback system at SuperKEKB. Proc. IPAC’15, Richmond, USA, 2015.
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