he Integration and Horizontal Testing of CSNS-II Double Spoke Cavity Cryomodule
he China Spallation Neutron Source (CSNS) is the fourth pulsed accelerator-driven neutron source in theworld, and it achieved its design target of 100 kW in 2020. The planned China Spallation Neutron Source PhaseII (CSNS-II) is set to commence in 2024. The CSNS-II Linac design mainly involves adding a Radio FrequencyIon Source and a section of a superconducting linear accelerator composed of two types of superconductingcavities, namely double-spoke cavities and 6-cell elliptical cavities, after the Drift Tube Linac (DTL) . Thedevelopment of the double-spoke superconducting cavity began in early 2021, and by January 2023, the welding,post-processing, and vertical tests of two 324 MHz double-spoke cavity prototypes had been completed, withvertical test gradients of 11.6 MV/m and 15 MV/m, and Q0 3 1010 @ Eacc 10 MV/m. The R&D of thecryomodule began in January 2022. In October 2023, the clean assembly of the double-spoke cavity string andthe cold mass installation of the cryomodule commenced,and it took two months to complete the installation ofthe cryomodule and valve box. In January 2024, the horizontal test of the cryomodule was completed, makingit the first double-spoke cavity module in China. The test results showed that the maximum gradients of the twosuperconducting cavities at a pulse width of 4 ms and a repetition frequency of 25 Hz were 12.8 MV/m and 15.2MV/m, respectively. This article provides a detailed introduction to the double-spoke superconducting cavity,tuner, coupler, and cryomodule, and elaborates on the clean assembly of cavity string and cold mass installationof the cryomodule, concluding with a detailed analysis of the horizontal test results.
ai, Jin、Han, Ye、Li,Mei、Pan, Weimin、Zhou, Wenzhong、He, Feisi、Mi, zhenghui、Xie,Zhexin、Liu, ming、Wang, Qunyao、Lin,Haiying、Liu,Baiqi、Wang,Xiaolong、He,Zhenqiang、Huang, Tongming、Ma,Qiang、hen,Xu、Sang,Minjing、Zhu,keyu、Ma,Changcheng、Ye,Rui、hang,zhengze、Sun,Liangrui、Ge, Rui、Xu,Miaofu、Fan,Mengxu、Zhang,Cong、Liu,Huachang、Mu,Zhencheng、Wang,Tong、Ye,Bin、Meng, Yang、Rong,Linyan、Zhang,Hui、Wang,Bo、Wan,Maliang、Wang,Yun、Wang,Sheng
Institute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of SciencesInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;Spallation Neutron Source Science CenterInstitute of High Energy Physics of the Chinese Academy of Sciences;University of Chinese Academy of Sciences;Spallation Neutron Source Science Center
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double-spoke cavity cryomodule cavity string vertical test horizontal test
double-spoke cavity cryomodule cavity string vertical test horizontal test
ai, Jin,Han, Ye,Li,Mei,Pan, Weimin,Zhou, Wenzhong,He, Feisi,Mi, zhenghui,Xie,Zhexin,Liu, ming,Wang, Qunyao,Lin,Haiying,Liu,Baiqi,Wang,Xiaolong,He,Zhenqiang,Huang, Tongming,Ma,Qiang,hen,Xu,Sang,Minjing,Zhu,keyu,Ma,Changcheng,Ye,Rui,hang,zhengze,Sun,Liangrui,Ge, Rui,Xu,Miaofu,Fan,Mengxu,Zhang,Cong,Liu,Huachang,Mu,Zhencheng,Wang,Tong,Ye,Bin,Meng, Yang,Rong,Linyan,Zhang,Hui,Wang,Bo,Wan,Maliang,Wang,Yun,Wang,Sheng.he Integration and Horizontal Testing of CSNS-II Double Spoke Cavity Cryomodule[EB/OL].(2025-03-31)[2025-06-06].https://chinaxiv.org/abs/202504.00006.点此复制
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