Title :
A 7-T Actively Shielded Superconducting Magnet for Animal MRI
Author :
Xiaohua Jiang ; Yan Guo ; Jiangbo Chen ; Guolin Chai ; Siyuan Liu ; Tieshan Zhang ; Lixiang Wang ; Taofeng Yang ; Hongxiang Cheng ; Huijuan Deng
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
An actively shielded superconducting magnet for animal magnetic resonance imaging has been designed and fabricated. It has a warm bore of 210-mm diameter and consists of five concentric solenoid coils made of epoxy-impregnated NbTi/Cu superconductors. The designed center field is 7 T, and the field homogeneity is 2.75 ppm on a 100-mm diameter of sphere volume. The positions of 5 Gs line are located at 2.1 m radially and 2.4 m axially from the magnet center. In the paper, results of the electromagnetic, structural, quench protection, and thermal designs of the magnet are presented.
Keywords :
biomedical MRI; copper; magnetic shielding; niobium alloys; superconducting magnets; titanium alloys; NbTi-Cu; actively shielded superconducting magnet; animal MRI; animal magnetic resonance imaging; concentric solenoid coils; field homogeneity; magnetic flux density 7 T; quench protection; size 210 mm; thermal designs; Coils; Magnetic noise; Magnetic resonance imaging; Magnetic shielding; Magnetomechanical effects; Superconducting magnets; Windings; Actively shielded; animal MRI; high field; superconducting magnet;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2012.2233538
