Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (3): 030102 doi: 10.13538/j.1001-8042/nst.25.030102

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Frequency control and pre-tuning of a large aperture 500 MHz 5-cell superconducting RF cavity

TANG Zheng-Bo, MA Zhen-Yu, HOU Hong-Tao, MAO Dong-Qing, FENG Zi-Qiang, WANG Yan, XU Kai, LUO Chen, LI Zheng, SHI Jing, LIU Jian-Fei   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
    3Shanghai Key Laboratory of Cryogenics & Superconducting RF Technology, Shanghai 201800, China
  • Contact: LIU Jian-Fei E-mail:liujianfei@sinap.ac.cn
PDF ShareIt Export Citation
TANG Zheng-Bo, MA Zhen-Yu, HOU Hong-Tao, MAO Dong-Qing, FENG Zi-Qiang, WANG Yan, XU Kai, LUO Chen, LI Zheng, SHI Jing, LIU Jian-Fei. Frequency control and pre-tuning of a large aperture 500 MHz 5-cell superconducting RF cavity.Nuclear Science and Techniques, 2014, 25(3): 030102     doi: 10.13538/j.1001-8042/nst.25.030102

Abstract:

The 500MHz 5-cell superconducting RF (SRF) cavity was designed aiming to be a candidate cavity for high current accelerators. A copper prototype cavity and a niobium cavity were fabricated at SINAP in 2012. In order to ensure these cavities get the desired frequency and a good field flatness higher than 98%, frequency control was implemented in the manufacturing process and pre-tuning has been done using a simple pre-tuning frame based on the bead-pull pre-tuning method. Then, TM010- mode frequency within 5 kHz from the target frequency was achieved and the field flatness reached 98.9% on the copper prototype cavity. Finally, the same procedure was applied to the niobium cavity to obtain a field flatness better than 98% which benefited the cavity performance in the vertical testing.

Key words: Superconducting RF cavity, Frequency control, Pre-tuning, Field flatness, Bead-pull method