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 ›› 2019, Vol. 30 ›› Issue (6): 93 doi: 10.1007/s41365-019-0614-2

• ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Design and commissioning of Brav measurement system for SC200 superconducting cyclotron

Man-Man Xu1 • Yun-Tao Song2 • Gen Chen2 • Yong-Hua Chen2 • Kai-Zhong Ding2 • Heng-Bo Li3 • Jun Wang3 • Jian Zhou2   

  1. 1 School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China
    2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230026, China
    3 Hefei CAS Ion Medical and Technical Devices Co., Ltd, Hefei 230088, China
  • Received:2018-03-28 Revised:2018-09-30 Accepted:2018-11-23
  • Contact: Gen Chen E-mail:chengen@ipp.ac.cn
  • Supported by:
    This work was supported by the Natural Science Foundation of Anhui under Grant (No. 1908085QA25), the Research Initiation Foundation of Anhui Polytechnic University (No. 2018YQQ001), the Pre- Research National Natural Science Foundation of China of Anhui Polytechnic University (No. 2019yyzr13), the National Natural Science Foundation of China (Nos. 11575237 and 11775258), the National Magnetic Confinement Fusion Science Program (No. 2015GB101001), and the International Scientific and Technological Cooperation Project of Anhui (No. 1704e1002207).
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Man-Man Xu, Yun-Tao Song, Gen Chen, Yong-Hua Chen, Kai-Zhong Ding, Heng-Bo Li, Jun Wang, Jian Zhou. Design and commissioning of Brav measurement system for SC200 superconducting cyclotron.Nuclear Science and Techniques, 2019, 30(6): 93     doi: 10.1007/s41365-019-0614-2
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Abstract: The SC200 proton therapy superconducting cyclotron was developed by ASIPP (Hefei, China) and JINR (Dubna, Russia). A measurement system was designed to assess the average radial component of the magnetic field (Brav) with 15 search coils in the median plane. The winding differences of the search coils affect the measurement accuracy of the Brav. Based on the electromagnetic induction principle, to measure the Brav accurately, this paper focuses on the design and commissioning of the Brav measurement system. The preliminary results confirm that the system design is reasonable and suitable. After testing the search coil at different speeds, the optimal speed was determined as 2.5 mm/s. The relative error was approximately 0.1% under the maximum radial component of the magnetic field Br of 7 G. The measurement precision was up to 1.0 × 10−3, which can provide the required measurement tolerance of 3–7 G for Br in the median plane. The commissioning of the Brav measurement system is an important step for Br measurement. It can check and adjust the asymmetry of the superconducting coils (SCs).

Key words: Superconducting cyclotron, Magnetic field, Measurement system, Commissioning