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Design and Test Result of a Superconducting Double-Spoke Cavity
Tiancai Jiang,Yulu Huang,Shengxue Zhang,Lubei Liu,Pingran Xiong,Chunlong Li,Hao Guo,Weiming Yue,Shenghu Zhang,Yuan He 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.3
Superconducting multi-spoke cavities are outstanding alternative choice for acceleration of heavy ions inmedium velocity regimes. Based on the scheme of China ADS, several researches on the superconductingdouble-spoke cavities were done and two prototype cavities have been developed. In this paper, the RFdesign, the mechanical design and fabrication considerations of the bare cavity will be described indetail. After Buffered Chemical Polishing and High Pressure Rinsing, one of the prototype cavities wasinstalled into the Vertical Test Stand for high gradient RF testing at 4.2 K. The measurement results of thequality factor as a function of the accelerating field and the maximum surface field will be presented. Anaccelerating gradient of more than 15 MV/m is achieved during the test, with maximum surface electricfield of 58 MV/m, and maximum surface magnetic field of 117 mT
Low beta superconducting cavity system design for HIAF iLinac
Mengxin Xu,Yuan He,Shengxue Zhang,Lubei Liu,Tiancai Jiang,Zehua Liang,Tong Liu,Yue Tao,Chunlong Li,Qitong Huang,Fengfeng Wang,Hao Guo,Feng Bai,Xianbo Xu,Shichun Huang,Xiaoli Li,Zhijun Wang,Shenghu Zha Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7
A superconducting ion-Linac (iLinac), which is supposed to work as the injector in the High Intensity heavy-ion Accelerator Facility project, is under development at the Institute of Modern Physics (IMP), Chinese Academy of Sciences. The iLinac is a superconducting heavy ion linear accelerator approximately 100 meters long and contains 96 superconducting cavities in two types of 17 cyromodules. Two types of superconducting resonators (quarter-wave resonators with a frequency of 81.25 MHz and an optimal beta β = v/c = 0.07 called QWR007 and half-wave resonators with a frequency of 162.5 MHz and an optimal beta β = 0.15 called HWR015) have been investigated. The cavity design included extensive multi-parameter electromagnetic simulations and mechanical analysis, and its results are described in details. The fundamental power coupler and cavity dynamic tuner designs are also presented in this article. The prototypes are under manufacturing and expected to be ready in 2023.
Yue Weiming,Zhang Shengxue,Li Chunlong,Jiang Tiancai,Liu Lubei,Wang Ruoxu,Huang Yulu,Tan Teng,Guo Hao,Zaplatin Evgeny,Xiong Pingran,Wu Andong,Wang Fengfeng,Zhang Shenghu,Huang Shichun,He Yuan,Yao Zeen 한국원자력학회 2020 Nuclear Engineering and Technology Vol.52 No.8
As a part of R&D work for the high intensity proton linac of China Accelerator Driven Sub-critical System project, a superconducting half-wave cavity with a frequency of 162.5 MHz and an optimal beta of 0.15 (HWR015) has been developed at Institute of Modern Physics (IMP), Chinese Academy of Sciences. In this paper, the design and test results will be described in detail. We introduced a new stiffening strategy for the HWR cavity, the simulation results show that the cavity has much lower frequency sensitivity coefficient (df/dp), Lorentz force detuning coefficient (KL), and can achieve more stable mechanical properties. The performance of the HWR cavity operated in cryostat will be also reported.