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• W4386697072 abstract "As an indispensable component of X-ray free electron lasers and future ring electron-positron colliders, a 1.3GHz 9-cell superconducting cavity provides higher acceleration voltage and higher RF power per unit length, and saves equipment space. During testing and operation, superconducting cavities often need to be cooled gradually from the ambient temperature (300K) to the superconducting temperature (4.5K or less). To avoid plastic deformation of materials and seal leaking caused by high thermal stress, the cooling rates in each stage and the temperature differences on the cavity must be properly controlled. Currently, a less effective manual control strategy is typically used, whose main limitations include a low level of automation, a high reliance on the experience of the operating personnel, and a fairly lengthy time due to low efficiency. In this paper, a 1.3GHz 9-cell superconducting cavity and its helium vessel were taken as the research subjects, six different mechanical structures of the helium vessel were designed, and six different three-dimensional thermal-flow coupling models were established. For each structural model, the temperature distribution and cooling strategy were analyzed using fluid numerical simulation software. The influence of inlet parameters on the cooling process was analyzed, and the appropriate mechanical structure model was recommended. The results showed that: During the cooling process, the closer the superconducting cavity is to the inlet, the lower the temperature is. The cooling rate is faster in the early stage in which the temperature difference can be reduced by 50% within the first 30 minutes. After experimental test verification, the total cooling time is about 650 min (10.8h or so), and the deviation between the simulation results and the experimental test results is less than 7%, which shows the simulation results can well predict the actual cooling process for 1.3GHz 9-cell superconducting cavity. The research work in this paper can lay a good foundation for the further R&D status of the superconducting cavity." @default.
• W4386697072 created "2023-09-14" @default.
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• W4386697072 date "2023-10-01" @default.
• W4386697072 modified "2023-10-06" @default.
• W4386697072 title "Comprehensive Dynamic Numerical Simulation of Cooling Process for a 1.3GHz 9-cell Superconducting Cavity Based on Different Structures" @default.
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• W4386697072 doi "https://doi.org/10.1016/j.physc.2023.1354350" @default.
• W4386697072 hasPublicationYear "2023" @default.
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