Structural Design of a 9.4 T Whole-Body MRI Superconducting Magnet
Applied Superconductivity, IEEE Transactions（2012）
摘要
A project to develop a 9.4 T magnetic resonance imaging system is proposed for bioscience research applications. A whole body superconducting magnet system will be manufactured and test in the Institute of Electrical Engineering, Chinese Academy of Sciences (IEE, CAS). This magnet system features a room temperature bore of 800 mm in diameter, helium bath cooing, 9.4 T center magnetic field and passive iron shielding. The magnet is designed with radial layer-winding method. Five coaxial coils will be wound independently and assembled together as the main magnet. Coil length of the magnet is 3000 mm. In the magnet design, current density grading is performed to optimize the magnetic field distribution and stress level in the coil windings. The maximum magnetic field is 9.505 T, corresponding to an operating current of 224.515 A. The total magnetic energy storage is 138 MJ. Detailed magnetic and mechanic structure design as well as structure stress analysis are presented in this paper.
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关键词
magnetic shielding,structure stress analysis,magnetic structure design,magnet design,superconducting magnet,magnetic flux density 9.505 t,bioscience research,mri,passive iron shielding,coaxial coil,radial layer winding method,magnetic resonance imaging,whole body mri superconducting magnet,current density grading,biomedical mri,nb-ti,magnetic resonance imaging system,superconducting magnets,coil length,mechanic structure design,superconducting coils,high field,magnetic flux density 9.4 t,energy storage,magnetic field,electrical engineering,windings,superconducting magnetic energy storage,iron,room temperature,stress analysis,current density,magnetic resonance image
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