HTS-NMR: Present Status and Future Plan
HTS-NMR: Present Status and Future Plan
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DOI：
10.1109/tasc.2010.2040148
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发表时间：
2010-02
影响因子：
1.8
通讯作者：
T. Kiyoshi;Seyong Choi;S. Matsumoto;K. Zaitsu;T. Hase;T. Miyazaki;A. Otsuka;M. Yoshikawa;M. Hamada;M. Hosono;Y. Yanagisawa;H. Nakagome;Masato Takahashi;T. Yamazaki;H. Maeda
中科院分区：
文献类型：
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作者：
T. Kiyoshi;Seyong Choi;S. Matsumoto;K. Zaitsu;T. Hase;T. Miyazaki;A. Otsuka;M. Yoshikawa;M. Hamada;M. Hosono;Y. Yanagisawa;H. Nakagome;Masato Takahashi;T. Yamazaki;H. Maeda
使用高Tc超导体（HTS）被认为是唯一的解决方案，以显着增加最高场的NMR磁体，因为它们的高临界场。然而，将HTS应用于NMR谱仪（HTS-NMR）并不容易，因为目前使用HTS的持续模式操作不能满足0.01ppm/h的场稳定性。为了克服这个问题，我们现在正在开发一种驱动模式操作的HTS-NMR光谱仪。作为第一步，用青铜增强的Bi-2223导体制造层绕线圈。代替Nb 3Sn线圈，安装Bi-2223线圈作为现有NMR磁体的最内部。磁体在11.7T的磁场下工作，具有高度稳定的电源。进行了NMR测量，并且证明了蛋白质上的多维NMR光谱的质量与用持续模式系统获得的质量相当。下一步将是证明其作为高场NMR系统的实用性。安装在筑波磁铁实验室的920兆赫核磁共振系统的升级正在进行中。其最内层线圈计划于2010年更换为Bi-2223层绕线圈。其目标场为24.2 T（1.03 GHz）。
Using high-Tc superconductors (HTS) is considered to be the only solution to dramatically increase the highest fields of NMR magnets because of their high critical fields. However, it is not easy to apply HTS to an NMR spectrometer (HTS-NMR) because a persistent-mode operation with HTS cannot satisfy the field stability of 0.01 ppm/h at present. To overcome this problem, we are now developing an HTS-NMR spectrometer in a driven-mode operation. As the first step, a layer-wound coil was fabricated with bronze-reinforced Bi-2223 conductors. Instead of the Nb3Sn coil, the Bi-2223 coil was installed as the innermost part of an existing NMR magnet. The magnet operated at a field of 11.7 T with a highly stabilized power supply. NMR measurements were carried out, and it was demonstrated that the quality of the multi-dimensional NMR spectra on the protein was equivalent to that obtained with a persistent-mode system. The next step will be to demonstrate its usefulness as a high-field NMR system. The upgrade of the 920 MHz NMR system installed at the Tsukuba Magnet Laboratory is underway. Its innermost coil is scheduled to be replaced by a Bi-2223 layer-wound coil for 2010. Its target field is 24.2 T (1.03 GHz).