Phase 2 of a 3-phase 1-GHz LTS/HTS NMR Magnet

描述（由申请人提供）：该第二阶段项目的具体目标是：1)完成高分辨率675 MHz/55 mm低温/高温超导（LTS/HTS）核磁共振磁体；2)将其转换为高分辨率600 MHz/125 mm核磁共振磁体，供FBML核磁共振组长期使用。与第一阶段项目一样，第二阶段项目旨在演示由LTS磁体和HTS插入体组成的磁体配置，适用于这个三期项目的每个阶段，在2008年12月完成高分辨率1ghz LTS/HTS核磁共振磁体是有效的。这个分三个阶段的项目是基于我们的坚定信念，即高分辨率，高场核磁共振磁体只能循序渐进地实现，就像我们的三个阶段的计划一样。目前最先进的超导磁体技术，以及未来几年LTS和HTS的预期，使得这种勤奋的一步一步的方法几乎是强制性的，以实现1ghz核磁共振磁体的最终目标。所有三个HTS insert将是双煎饼线圈，每个线圈与Bi-2223/Ag。Insert 2的设计已经进行了修改和更新，纳入了Insert 1的性能结果，Insert 1是用于第一阶段系统的HTS插入，目前处于其项目的最后几个月。第二阶段计划是第一阶段计划的延续，并为第三阶段计划做准备。由于Insert 2的存在，第二阶段系统将在驱动模式下运行，除了演示最终版本在1 GHz工作的概念验证外，与现在市面上现成的i - lts 675 MHz/55 mm核磁共振磁体相比，它将不是一个长期使用的高效核磁共振磁体。在第二阶段的最后几个月，该系统将被转换成高分辨率的li - lts 600 MHz/125 mm核磁共振磁体，并转移到FBML的核磁共振组。

DESCRIPTION (provided by applicant): The specific aims of this Phase 2 program, to be achieved in sequence, are to: 1) complete a high resolution 675 MHz/55 mm low-/high-temperature superconducting (LTS/HTS) NMR magnet; and 2) convert it to a high-resolution 600 MHz/125 mm NMR magnet for long-term use by the NMR group at the FBML. The Phase 2 program is intended to demonstrate, as in the Phase 1 project, that a magnet configuration comprised of an LTS magnet and an HTS insert, adapted for each phase of this 3-phase project, is valid to complete a high-resolution 1 GHz LTS/HTS NMR magnet in December 2008. This 3-phase project is based on our strong belief that a high-resolution, high-field NMR magnet is attainable only in incremental steps, as in our program of three phases. The present state-of-the-art of superconducting magnet technology and that expected in the next few years for LTS and HTS makes this assiduous step-by-step approach almost mandatory to achieve the ultimate goal of a 1 GHz NMR magnet. All three HTS Inserts will be double-pancake coils, each wound with Bi-2223/Ag. The design of Insert 2 has been modified and updated by incorporating performance results of Insert 1, the HTS insert for the Phase 1 system, which is presently in the last months of its program. This proposed Phase 2 program continues the Phase 1 program and prepares for the Phase 3 program. Because of the presence of Insert 2, the Phase 2 system will be operated in driven mode and except to demonstrate the proof-of-concept for the ultimate version operating at 1 GHz, it will not be an efficient NMR magnet for long-term use, compared with an alI-LTS 675 MHz/55 mm NMR magnet now readily available commercially. In the closing months of the Phase 2, the system will be converted into a high-resolution alI-LTS 600 MHz/125 mm NMR magnet and transferred to the NMR group at FBML. The significance of the Phase 2 program, as was the Phase 1 program, is two fold: 1) successful operation of a high-resolution LTS/HTS NMR magnet; 2) successful demonstration of key design principles and philosophy adopted for Insert 2, which has already been modified from the original design based on the latest results of Insert 1. We expect to use Insert 2 performance results to optimize Insert 3 design.