Magic-Angle-Spinning NMR Magnet Development: Field Analysis and Prototypes

作者：Voccio John^*; Hahn Seungyong; Park Dong Keun; Ling Jiayin; Kim Youngjae; Bascunan Juan; Iwasa Yukikazu

来源：IEEE Transactions on Applied Superconductivity, 2013, 23(3): 4300804.

DOI：10.1109/TASC.2013.2245934

• Magic angle
• magnet
• nuclear magnetic resonance (NMR)
• spinning
• superconductor

We are currently working on a program to complete a 1.5 T/75 mm RT bore magic-angle-spinning nuclear magnetic resonance magnet. The magic-angle-spinning magnet comprises a z-axis 0.866-T solenoid and an x-axis 1.225-T dipole, each to be wound with NbTi wire and operated at 4.2 K in persistent mode. A combination of the fields creates a 1.5-T field pointed at 54.74 degrees (magic angle) from the rotation (z) axis. In the first year of this 3-year program, we have completed magnetic analysis and design of both coils. Also, using a winding machine of our own design and fabrication, we have wound several prototype dipole coils with NbTi wire. As part of this development, we have repeatedly made successful persistent NbTi-NbTi joints with this multifilamentary NbTi wire.

• 出版日期2013-6