CONSTRUCTION OF AN 850 MHZ SUPERCONDUCTING NMR MAGNET

这项修订建议的主要目的是完成 列出了高分辨率NMR系统所需的以下组件 按照优先顺序：1.宽口径（RT直径97 mm）750 MHz （17.62T）LTS磁体在4.2K下工作。2.高场（2.35T）高温超导体 在4.2K下运行的插件。3.一种流量泵，可用于满足 HTS插入物的时间场稳定性。4.一个窄口径（62毫米RT 直径）850-MHZ（19.97T）磁体在持续 模式为4.2K。 这些组件的完成为FBML提供了两个可能的选项： 仅使用组件1，宽口径（97 mm）750-MHZ系统的操作。 使用组件1、2和3，操作窄口径（62 mm），852-MHZ (20T)系统 组件1基于科比钢铁有限公司资助的窄口径750兆赫 (Mark 1）项目。 该项目被用作关键的研发工具， 日本磁铁技术（JMT），科比钢铁有限公司的子公司，到 开发自己的高分辨率核磁共振超导磁体技术。 虽然马克1号从未完成，但关键技术在 Mark 1的设计、制造和试验已经被纳入联合MTs 750-自1994年以来，MHZ磁体在日本成功上市 JMT和美国的Magnex。 联合监测组的成功表明， 麻省理工学院开发的技术的基本可靠性，并意味着一个高 完成本拟议项目第1部分的可能性。

The principal aims of this revised proposal are completion of the following components required for high-resolution NMR systems, listed in order of priority: 1. A wide-bore (97mm RT diameter) 750-MHZ (17.62T) LTS magnet operating at 4.2K. 2. A high-field (2.35T) HTS insert operating at 4.2K. 3. A flux pump that can be used to satisfy the temporal field stability for the HTS insert. 4. A narrow-bore (62mm RT diameter) 850-MHZ (19.97T) magnet operating effectively in persistent mode at 4.2K. Completion of these components provides the FBML two possible options: With Component 1 alone, operation of a wide-bore (97mm) 750-MHZ system. With Components 1, 2, and 3, operation of a narrow-bore (62mm), 852-MHZ (20T) system. Component 1 is based on the Kobe Steel Ltd. funded narrow-bore 750-MHZ (Mark 1) project. The project was used as the key R&D vehicle for the Japan Magnet Technology (JMT), a subsidiary of Kobe Steel Ltd., to develop its own high-resolution NMR superconducting magnet technology. Although Mark 1 was never completed, key technologies developed in the design, manufacture, and test of Mark 1 have been incorporated into JMTs 750-MHZ magnets that have since 1994 been successfully marketed in Japan by JMT and in the US by Magnex. The JMT's success demonstrates the basic soundness of technologies developed at MIT and implies a high probability of completion of Component 1 under this proposed project.