Bi-2223 Innermost Coil for 1.03 GHz NMR Magnet
Bi-2223 Innermost Coil for 1.03 GHz NMR Magnet
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DOI：
10.1109/tasc.2010.2082475
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发表时间：
2011-06
影响因子：
1.8
通讯作者：
T. Kiyoshi;Seyong Choi;Shinji Matsumoto;K. Zaitsu;T. Hase;T. Miyazaki;M. Hamada;M. Hosono;Hiroshi Maeda
中科院分区：
文献类型：
--
作者：
T. Kiyoshi;Seyong Choi;Shinji Matsumoto;K. Zaitsu;T. Hase;T. Miyazaki;M. Hamada;M. Hosono;Hiroshi Maeda
由于其高临界磁场，高温超导体（HTS）被认为是唯一的解决方案，以显着提高最高场的核磁共振磁体。我们已经成功地证明，一个500 MHz的高温超导/低温超导核磁共振系统与Bi-2223最内层的线圈可以用于溶液核磁共振驱动模式操作。下一步，正在对筑波磁铁实验室安装的920 MHz NMR系统进行升级。最里面的Nb 3Sn线圈已被Bi-2223线圈取代。该线圈是作为一个层绕线圈使用五个Bi-2223导体加强青铜带。它与外部Nb 3Sn和NbTi线圈串联连接。磁体预期在244.4 A的工作电流下产生24.2 T（1H共振频率为1.03 GHz）的磁场。成功地进行了使用Bi-2223线圈和外部Nb 3Sn线圈组合的测试。线圈已安装在1.03 GHz的NMR磁体。其冷却和运行计划于2010财政年度内进行。
Because of their high critical fields, high-Tc superconductors (HTS) are considered to be the only solution to dramatically increase the highest fields of NMR magnets. We have successfully demonstrated that a 500 MHz HTS/LTS NMR system with a Bi-2223 innermost coil could be used for solution NMR in a driven-mode operation. As the next step, the upgrade of the 920 MHz NMR system installed at the Tsukuba Magnet Laboratory is underway. The innermost Nb3Sn coil has been replaced by a Bi-2223 coil. The coil was fabricated as a layer-wound coil using five Bi-2223 conductors reinforced with bronze tapes. It was connected in series with the outer Nb3Sn and NbTi coils. The magnet is expected to generate a field of 24.2 T (1.03 GHz of 1H resonance frequency) at an operating current of 244.4 A. The test using the Bi-2223 coil and the outer Nb3Sn coils in combination was successfully carried out. The coil has been installed in the 1.03 GHz NMR magnet. Its cooling and operation are scheduled to take place within Fiscal Year 2010.