Application of a Compact Cryogen-free Superconducting Bulk Magnet to NMR: - Evaluation of a Superconducting Bulk Magnet using NMR Signal -@@@―NMR信号を用いたバルク磁石の評価－
Application of a Compact Cryogen-free Superconducting Bulk Magnet to NMR: - Evaluation of a Superconducting Bulk Magnet using NMR Signal -@@@―NMR信号を用いたバルク磁石の評価－
复制标题
紧凑型无制冷剂超导块体磁体在 NMR 中的应用： - 使用 NMR 信号评估超导块体磁体 -@@@―使用 NMR 信号评估块体磁体―
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
H. Utsumi
中科院分区：
文献类型：
--
作者：
Takashi Nakamura;Y. Itoh;M. Yoshikawa;N. Sakai;S. Nariki;I. Hirabayashi;H. Utsumi
简介：使用环形体超导体开发了一种紧凑型无冷冻剂 NMR 磁体。超导块体磁体采用场冷 (FC) 方法在 4.7 T 下运行。提出并研究了两种具有不同配置的磁体。一块磁体由三个 GdBaCuO 和两个 SmBaCuO 块体组成，外径 (OD) 为 60 mm，内径 (ID) 为 16 mm，总高度为 60 mm。具有较高相对磁导率 (1.01) 的 GdBaCuO 块体夹在具有较低磁导率 (1.0003) 的 SmBaCuO 块体之间。另一个磁体由四个 EuBaCuO 块组成，磁导率为 1.001，外径为 60 毫米，内径为 16 毫米，高度为 70 毫米。使用这些磁体，我们观察了甲苯 1 H NMR 谱的化学位移，并证实块状磁体产生的磁场均匀性小于甲苯甲基质子信号半峰全宽 (FWHM) 0.5 ppm。 EuBaCuO 块体磁体的磁场稳定性低于 0.02 μT/小时。
Synopsis : A compact cryogen-free NMR magnet was developed using annular bulk superconductors. The superconducting bulk magnet is energized using a field-cooling (FC) method operated at 4.7 T. Two magnets with different configurations are proposed and investigated. One magnet consists of three GdBaCuO and two SmBaCuO bulks with outer diameters (OD) of 60 mm, inner diameters (ID) of 16 mm and a total height of 60 mm. The GdBaCuO bulks that have higher relative magnetic permeability (1.01) are sandwiched between the SmBaCuO bulks that have lower permeability (1.0003). The other magnet consists of four EuBaCuO bulks with a permeability of 1.001, OD of 60 mm, ID of 16 mm and height of 70 mm. Using these magnets, we observed a chemical shift of toluene 1 H NMR spectra and confirmed that the bulk magnets generated a magnetic field with homogeneity less than 0.5 ppm from the full width at half the maximum (FWHM) of a methyl proton signal of toluene. Magnetic field stability of less than 0.02 μ T/hour was achieved in the EuBaCuO bulk magnet.