An Optimal Configuration Method of Superconducting Magnet With Iron Shield Using Model Order Reduction

• Published in: IEEE transactions on applied superconductivity Vol. 32; no. 6; pp. 1 - 5
• Main Authors: Noguchi, So, Ueda, Hiroshi, Watanabe, Tomonori, Nagaya, Shigeo, Ishiyama, Atsushi, Fukuda, Mitsuhiro
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Barium; Coils; Computation; Configuration management; Copper oxides; Cyclotron accelerator; Cyclotrons; High-temperature superconductors; Iron; iron shield; Magnetic moments; Magnetic noise; Magnetic shielding; model order reduction; Model reduction; optimal design; Optimization; Radioisotopes; Rare earth elements; REBCO magnet; Weight reduction
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2022.3175454

We have been developing a cyclotron accelerator for radioisotope production of medical use. The features of developed cyclotron system are compactness, light weight, and multi energy outputs. To achieve such features, coils are wound with rare-earth barium copper oxide (REBCO) tapes and the magnet has no iron core to generate an azimuthal varying field (AVF). To install the developed cyclotron accelerator into hospitals, an iron shield is needed for protection of leakage radiation and magnetic field. In this paper, to optimally design main coils with iron shield, a fast field computation method called "Model Order Reduction (MOR)" is adopted. Using MOR technique, the field computation is accelerated ∼50 times. The error of MOR field computation is sufficiently small. Hence, the MOR is effective in the optimal configuration design of coils with iron shield. The optimized configuration of a miniaturized cyclotron accelerator magnet is also shown.