A More Homogeneous, Less Massive Halbach Magnet array for Portable NMR
A more homogeneous, less massive Halbach magnet array for portable NMR was presented. Based on the general theory of cylindrical magnet, we describe a construction and performance of a small cylindrical magnet using crescent-shaped configuration to improve the 2D field homogeneity, and a novel test tube magnet (TTM) composed of a dipole cylinder magnet and a hemi-sphere magnet at one end to improve the 3D field homogeneity. The improved field of cylindrical magnet, with inner radii, 30mm, and outer radii, 35mm, is simulated by ANSOFT MAXWELL 3D and MATLAB. Flux density elements are effectively corrected in the homogeneous magnetic field region. The homogeneity increases, the magnet volumes and mass are relatively decreased, and the construction is very reasonable. Taken together the new designs have improved characteristics for portable NMR. A more homogeneous, less massive Halbach magnet array for portable NMR was presented. Based on the general theory of cylindrical magnet, we describe a construction and performance of a small cylindrical magnet using crescent-shaped configuration to improve the 2D field homogeneity, and a novel test tube magnet (TTM) composed of a dipole cylinder magnet and a hemi-sphere magnet at one end to improve the 3D field homogeneity. The improved field of cylindrical magnet, with inner radii, 30mm, and outer radii, 35mm, is simulated by ANSOFT MAXWELL 3D and MATLAB. Flux density elements are effectively corrected in the homogeneous magnetic field region. The homogeneity increases, the magnet volumes and mass are relatively decreased, and the construction is very reasonable. Taken together the new designs have improved characteristics for portable NMR.
Portable NMR Halbach Arrays Field Compensation Test Tube Magnet (TTM) Keywords: Portable NMR Halbach Arrays Field Compensation Test Tube Magnet (TTM)
Chen Jizhong Zhang Yiming Xu Chunyan
Graduate University of the Chinese Academy of Sciences;Institute of Electrical Engineering,Chinese A Graduate University of the Chinese Academy of Sciences Beijing Sport University
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）