Precise Upper Surface Shimming Algorithm for Isochronous Cyclotrons With the Gauss–Newton Iteration Method
Magnetic field shimming is crucial for achieving isochronous acceleration in a cyclotron. Matrix methods based on least square fitting are commonly used to calculate the cutting curve of a shimming bar. However, this matrix method becomes inapplicable when dealing with cases of nonlinear shimming effects. An algorithm based on the Gauss-Newton iteration method to address shimming problems with nonlinear effects has been proposed. Numerical and experimental results demonstrate the effectiveness and accuracy of this algorithm. It has been applied to a compact PET cyclotron developed at China Institute of Atomic Energy.
Authors
- Guang Yang (ORCID: https://orcid.org/0000-0003-0994-9178)
- Fengping Guan
- Tianjian Bian (ORCID: https://orcid.org/0000-0003-0140-531X)
- Xinyu Chen (ORCID: https://orcid.org/0009-0006-8221-5233)
- Peng Huang (ORCID: https://orcid.org/0000-0003-0620-0911)
- Luyu Ji
- Pengfei Zhu (ORCID: https://orcid.org/0000-0002-2566-5493)
- Sumin Wei
- Yuanhao Liu (ORCID: https://orcid.org/0000-0001-6375-7789)
- Jie Liu (ORCID: https://orcid.org/0000-0003-0193-1336)
- Fei Wang (ORCID: https://orcid.org/0000-0003-1871-1022)
- Jinrong Lu
- Jiansheng Xing
- Shizhong An
- Wu Cong
Institutions
- China Institute of Atomic Energy (CN)
Publication Details
- Journal
- IEEE Transactions on Nuclear Science
- Published
- 2025-05-07
- DOI
- https://doi.org/10.1109/tns.2025.3567768
- Primary Topic
- Particle accelerators and beam dynamics
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China