Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Design and test result of a superconducting double-spoke cavity

  • Jiang, Tiancai (University of Chinese Academy of Sciences) ;
  • Huang, Yulu (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Zhang, Shengxue (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Liu, Lubei (University of Chinese Academy of Sciences) ;
  • Xiong, Pingran (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Li, Chunlong (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Guo, Hao (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Yue, Weiming (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • Zhang, Shenghu (Institute of Modern Physics, Chinese Academy of Sciences) ;
  • He, Yuan (Institute of Modern Physics, Chinese Academy of Sciences)
  • Received : 2018.05.01
  • Accepted : 2018.12.12
  • Published : 2019.04.25
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Abstract

Superconducting multi-spoke cavities are outstanding alternative choice for acceleration of heavy ions in medium velocity regimes. Based on the scheme of China ADS, several researches on the superconducting double-spoke cavities were done and two prototype cavities have been developed. In this paper, the RF design, the mechanical design and fabrication considerations of the bare cavity will be described in detail. After Buffered Chemical Polishing and High Pressure Rinsing, one of the prototype cavities was installed into the Vertical Test Stand for high gradient RF testing at 4.2 K. The measurement results of the quality factor as a function of the accelerating field and the maximum surface field will be presented. An accelerating gradient of more than 15 MV/m is achieved during the test, with maximum surface electric field of 58 MV/m, and maximum surface magnetic field of 117 mT.

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References

  1. J.R. Delayen, Applications of spoke cavities, in: Proc. 25th Int. Linac Conf. (LINAC'10), Tsukuba, Japan, Sep. 2010, pp. 377-381.
  2. C.S. Hopper, J.R. Delayen, Superconducting spoke cavities for high-velocity applications, Phys. Rev. ST Accel. Beams 16 (Oct. 2013) 102001, https://doi.org/10.1103/PhysRevSTAB.16.102001.
  3. S. Holmes, et al., PIP-II status and strategy, in: Proc. 6th Int. Particle Accelerator Conf. (IPAC'15), Richmond, USA, May 2015, pp. 3982-3985.
  4. S. Peggs, The european spallation source, in: Proc. 2th Int. Particle Accelerator Conf. (IPAC'11), San Sebastian, Spain, Sep. 2011, pp. 3790-3793.
  5. Y. He, et al., SRF Cavities for ADS project in China, in: Proc. 16th Int. Conf. On RF Superconductivity (SRF'13), Paris, France, Sep. 2013, pp. 868-872.
  6. H.H. Niu, et al., The mechanical design and fabrication of 162.5 MHz buncher for China accelerator driven sub-critical system injector II, Nuclear Engineering and Technology 49 (Aug. 2017) 1071-1078, https://doi.org/10.1016/j.net.2017.03.003.
  7. CST, http://www.cst.com/.
  8. A.D. Wu, et al., Design study on medium beta superconducting half-wave resonator at IMP, Nucl. Sci. Tech. 27 (July 2016) 1608001, https://doi.org/10.1007/s41365-016-0081-y.
  9. H. Guo, et al., Study on local chemical treatment for recovery from surface oxidation by HPR process on SRF cavities, in: Proc. 18th Int. Conf. On RF Superconductivity (SRF'17), Lanzhou, China, June 2017, pp. 592-594, https://doi.org/10.18429/JACoW-SRF2017-TUPB086.