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Description
This paper presents the progress in the beam diagnostic system for the Super Tau-Charm Facility. The particle beams at the facility are characterized by ultra-high intensity and relatively low energy (compared to those at SuperKEKB and CEPC), leading to key challenges such as small aperture, short lifetime, and strong collective effects. To address these challenges and accomplish tasks related to beam measurement and tuning, we first outline the main configuration and installation layout plan of the beam diagnostic system, along with the technical approaches for its major components. Subsequently, the quantity and design of these components are iteratively updated in accordance with advances in the physical design. During this process, we will promote research on key technologies by incorporating the latest trends in beam diagnostics. Considerable progress has already been made in areas such as precise bunch-by-bunch measurement, high-stability beam feedback, and accurate tracking and diagnostics of injection beams. Some updates were made in response to the IAC comments.
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