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TY - CONF AU - Yao, Q.G. AU - Wang, B. AU - Wu, B.M. AU - Wu, W. AU - Yang, L. ED - Conradie, Lowry ED - De Villiers, John Garrett ED - Schaa, Volker RW TI - The Magnetic Field Design of Cyclotron at IMP J2 - Proc. of Cyclotrons2019, Cape Town, South Africa, 23-27 September 2019 CY - Cape Town, South Africa T2 - International Conference on Cyclotrons and their Applications T3 - 22 LA - english AB - A cyclotron magnet is studied at Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS), and the whole system include one main magnet and other magnetic gradient correctors, which is used to accelerate the Kr²⁶⁺ beam. The structure of superconducting coils and room-temperature iron core are adopted for the main magnet. This paper describes the magnetic field design of the cyclotron, and several shimming methods are used to meet the isochronous magnetic field of Kr²⁶⁺ beam, including pole face shimming method and side shimming method. The final optimization results show that the error between simulation and theory value is small. In addition, the magnet structure is also described. PB - JACoW Publishing CP - Geneva, Switzerland SP - 116 EP - 118 KW - cyclotron KW - focusing KW - MMI KW - cryogenics KW - extraction DA - 2020/06 PY - 2020 SN - 978-3-95450-205-9 DO - doi:10.18429/JACoW-Cyclotrons2019-MOP036 UR - http://jacow.org/cyclotrons2019/papers/mop036.pdf ER -