High-Temperature Superconducting Magnets for NMR and MRI: R&D Activities at the MIT Francis Bitter Magnet Laboratory

This paper describes the NMR/MRI magnets that are currently being developed at the MIT Francis Bitter Magnet Laboratory: 1) a 1.3 GHz NMR magnet; 2) a compact NMR magnet assembled from YBCO annuli; and 3) a persistent-mode, fully-protected MgB2 0.5-T/800-mm whole-body MRI magnet.

[1]  Martin N. Wilson,et al.  Case studies in superconducting magnets: Yukikazu Iwasa , 1996 .

[2]  Richard L. Magin,et al.  High-Resolution Microcoil 1H-NMR for Mass-Limited, Nanoliter-Volume Samples , 1995, Science.

[3]  E. S. Bobrov,et al.  Development of a 700 MHz low-/high- temperature superconductor nuclear magnetic resonance magnet: test results and spatial homogeneity improvement. , 2008, The Review of scientific instruments.

[4]  Y. Iwasa,et al.  A "persistent-mode" magnet comprised of YBCO annuli , 2005, IEEE Transactions on Applied Superconductivity.

[5]  Yukikazu Iwasa,et al.  Trapped Field Characteristics of Stacked YBCO Thin Plates for Compact NMR Magnets: Spatial Field Distribution and Temporal Stability , 2010, IEEE Transactions on Applied Superconductivity.

[6]  N. Amemiya,et al.  Magnetic field generated by shielding current in high Tc superconducting coils for NMR magnets , 2008 .

[7]  Seungyong Hahn,et al.  A Superconducting Joint Technique for ${\rm MgB}_{2}$ Round Wires , 2009, IEEE Transactions on Applied Superconductivity.

[8]  Seungyong Hahn,et al.  A Solid Nitrogen Cooled ${\hbox{MgB}}_{2}$ “Demonstration” Coil for MRI Applications , 2008, IEEE Transactions on Applied Superconductivity.

[9]  Yukikazu Iwasa,et al.  A Solid Nitrogen Cooled MgB(2) "Demonstration" Coil for MRI Applications. , 2008, IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.

[10]  Masato Murakami,et al.  High-temperature superconductor bulk magnets that can trap magnetic fields of over 17 tesla at 29 K , 2003, Nature.

[11]  Yukikazu Iwasa,et al.  MgB2 Coils for MRI Applications. , 2010, IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.

[12]  Yukikazu Iwasa,et al.  A low- and high-temperature superconducting NMR magnet: design and performance results , 2003 .

[13]  Min Cheol Ahn,et al.  Operation and performance analyses of 350 and 700 MHz low-/high-temperature superconductor nuclear magnetic resonance magnets: A march toward operating frequencies above 1 GHz , 2009 .

[14]  T. Qu,et al.  Measurement and Calculation of Residual Magnetic Field in a Bi2223/Ag Magnet , 2007, IEEE Transactions on Applied Superconductivity.

[15]  S. Hahn,et al.  Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet , 2009, IEEE Transactions on Applied Superconductivity.