Speaker
Description
Due to the complex optics and strong magnets of the Super Tau-Charm Facility (STCF) collider rings, the luminosity and beam dynamics are highly sensitive to magnetic field errors. Based on error sensitivity studies for the STCF and error tolerances adopted in other collider rings, a preliminary error budget has been established. This paper presents error correction results for STCF collider rings with center-of-mass energy of 2 GeV using a systematic correction chain, that includes first-turn trajectory correction, orbit correction via dispersion-free steering method, beta correction via LOCO method, and $\beta^*_y$ correction with the $k$-modulation method. Simulation results show that after correction, the global closed orbit, $\beta$-beat, dispersion distortion, and coupling ratio are effectively reduced to acceptable levels. Consequently, the impact on nonlinear dynamics and luminosity is greatly suppressed.
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