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Description
The STCF injector Main Linac comprises 36 constant-gradient traveling-wave structures. Equipment misalignments and orbit distortions severely degrade beam quality. This paper presents the design and simulation of its online beam alignment system. First, the spatial layout of dual-plane correctors and beam position monitors (BPMs) is optimized for long-distance transmission. Second, dual-plane corrector magnets are designed and electromagnetically optimized to ensure magnetic performance and structural stability. Finally, an error transfer model evaluates beam dynamics under various installation and orbit errors, quantifying their impacts and verifying the system's trajectory correction efficacy. This study provides a vital engineering reference for the STCF, ensuring high-precision stable beam operation.
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