Ultra-high-quality factor and ultra-high accelerating gradient achievements in a 1.3 GHz continuous wave cryomodule

分类： 核科学技术 >> 粒子加速器 分类： 物理学 >> 核物理学 提交时间： 2024-12-15

Jin-Fang Chen Yue Zong Xiao-Yun Pu Sheng-Wang Xiang Shuai Xing Zheng Li Xu-Ming Liu Yan-Fei Zhai Xiao-Wei Wu Yong-Zhou He Ling-Ling Gong Ji-Dong Zhang Shan-Shan Cao Wen-Ding Fan Bin-Tuan Zhang Kai Xu Yi-Bo Yu Guang-Hua Chen Li-Jun Lu Ya-Wei Huang

摘要： We report the world-leading performance of a 1.3 GHz cryomodule equipped with eight 9-cell superconducting radio-frequency cavities that underwent a medium-temperature furnace baking process. During continuous wave horizontal testing, these cavities achieved unprecedented average intrinsic quality factors of 4.0 × 1010 at 20 MV/m and 3.2 × 1010 at 29 MV/m, with no instances of field emission. The cryomodule demonstrates near-complete preservation of ultra-high-quality factors and ultra-high accelerating gradients from vertical to horizontal testing, marking a significant milestone in continuous-wave superconducting radio-frequency accelerator technology. This letter presents the cryomodule development experience, including cavity preparation, cryomodule assembly, degaussing, fast cooldown, and performance testing.

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