Design of the superconducting magnet for 9.4 Tesla whole-body magnetic resonance imaging

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Li, Y.^1 ; Wang, Q.^1 ; Dai, Y.^1 ; Ni, Z.^2 ; Zhu, X.^1 ; Li, L.^1 ; Zhao, B.^1 ; Chen, S.^1

Institute of Electrical Engineering, Chinese Academy of Sciences, China^1

Philips Healthcare Suzhou, China^2

关键词: Chinese Academy of Sciences;    Continuum Modeling;    Detailed models;    Electromagnetic designs;    Helium boiling;    Quench protection;    Simulation code;    Stress and strain analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012105/pdf
DOI  :  10.1088/1757-899X/171/1/012105

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A superconducting magnet for 9.4 Tesla whole-body magnetic resonance imaging is designed and fabricated in Institute of Electrical Engineering, Chinese Academy of Sciences. In this paper, the electromagnetic design methods of the main coils and compensating coils are presented. Sensitivity analysis is performed for all superconducting coils. The design of the superconducting shimming coils is also presented and the design of electromagnetic decoupling of the Z2 coils from the main coils is introduced. Stress and strain analysis with both averaged and detailed models is performed with finite element method. A quench simulation code with anisotropic continuum model and control volume method is developed by us and is verified by experimental study. By means of the quench simulation code, the quench protection system for the 9.4 T magnet is designed for the main coils, the compensating coils and the shimming coils. The magnet cryostat design with zero helium boiling-off technology is also introduced.