Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (3): 30201-030201.doi: 10.11889/j.0253-3219.2019.hjs.42.030201

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Research on the method of magnetic field shimming for SC200 superconducting cyclotron

Pengyan ZHOU1,Yuntao SONG1,2,Kaizhong DING2,Junjun LI2()   

  1. 1. University of Science and Technology of China, Hefei 230026, China
    2. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2018-11-19 Revised:2019-01-07 Online:2019-03-10 Published:2019-03-14
  • Contact: Junjun LI E-mail:lijunjun73@ipp.ac.cn
  • About author:<named-content content-type="corresp-name">ZHOU Pengyan</named-content>, female, born in 1994, graduated from Zhengzhou University in 2016, master student, focusing on the design of main magnet for cyclotron|<named-content content-type="corresp-name">ZHOU Pengyan</named-content>, female, born in 1994, graduated from Zhengzhou University in 2016, master student, focusing on the design of main magnet for cyclotron|LI Junjun, E-mail:<email>lijunjun73@ipp.ac.cn</email>

Abstract: Background

Considering the nonlinearity of magnet material, the homogeneity of the material and the accuracy of the finite element numerical simulation, sufficient safety margin of the sector is left in the design of the main magnet. In order to obtain ideal isochronous magnetic field after the machining and assembling the magnet, the shimming procedure is necessary according to the actual measured magnetic field. It can ensure the safe implementation of the project.

Purpose

This study aims at the magnet shimming method that is very important for the design and manufacture of the main magnet of cyclotron.

Methods

First of all, the influence of different cutting parameters of magnet pole on the magnetic field in the middle plane was investigated by using the finite element analysis software TOSCA. Then the superposition effect of adjacent grooves on magnetic field was considered to give a numerical method for calculating the shimming value of the sectors. [Result &

Conclusion

The feasibility of magnetic field shimming method was verified by simulation, which provides an effective basis for actual magnetic field shimming in the future.

Key words: Cyclotron, Isochronous field, Cutting magnetic pole, Magnetic field shimming

CLC Number: 

  • TL542