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This paper focuses on a preliminary design study of the cryostat for the insertion device magnet—specifically, a high-temperature superconducting bending magnet—in the HALF (Hefei Advanced Light Facility) national major science and technology infrastructure project. Based on three-dimensional modeling and finite element analysis, the structural and thermal performance of the cryostat was simulated and evaluated. Key optimizations were made to the mechanical configuration, thermal conduction characteristics, and spatial layout of the support structures at the temperature ports. A low thermal conductivity tension rod support structure was designed for the cold shield and superconducting magnet assembly, along with a rationally planned layout for the current leads and thermal management pathways. Through systematic heat leak analysis of the dual-temperature zones, a balance was achieved between structural deformation control and heat leak suppression. A preliminary design scheme that meets both structural stiffness requirements and low thermal load criteria is proposed, providing a reference for the subsequent development of an engineering prototype of the cryostat.
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