Speaker
Description
Ironless superconducting cyclotrons, with their advantages of strong magnetic field, compact size, ultralight weight and less sensitive to ambient temperature, show broad application prospects in many areas, such as isotope production, proton irradiation, etc. However, compared to conventional room temperature cyclotron with iron yokes, using superconducting coils as magnet poles and operating at low temperatures to maintain superconductivity necessitates considering thermal deformation of the cold mass during the design of the ironless superconducting magnet. An ironless superconducting cyclotron with 100MeV final energy is under development at China Institute of Atomic Energy. The cooling process within the cryogenic environment induces non-uniform thermal contraction deformation in multi-material components. To avoid concentrated residual stresses, geometric distortion, magnetic field distortion, and the possible quench risk, a three-dimensional finite element model has been established to simulate the thermal structural deformation behavior of the ironless superconducting magnet under several working conditions during the cooling process from room temperature to the operating temperature. The displacement and stress distributions of key components, and their impact on magnetic field homogeneity have been evaluated and an optimized ironless superconducting magnet design has been obtained for the 100 MeV ironless high-temperature superconducting cyclotron.
Footnotes
*: Corresponding Author, Dr. Chuan Wang, Email:wangchuan@cnnc.mail.cn
