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

三相 1 GHz LTS/HTS NMR 磁体的第 2 相

• 批准号: 6898381
• 负责人: Yukikazu Iwasa
• 金额: $ 62.39万
• 依托单位: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-30 至 2008-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6898381
• 关键词: bioimaging /biomedical imaging; biomedical equipment development; cold temperature; image enhancement; magnetic field; nuclear magnetic resonance spectroscopy; superconductivity

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.

描述(由申请人提供)：这一第二阶段计划的具体目标是：1)完成高分辨率675 MHz/55 mm低/高温超导(LTS/HTS)核磁共振磁体；以及2)将其转换为高分辨率600 MHz/125 mm核磁共振磁体，供FBML的核磁共振小组长期使用。第二阶段计划旨在证明，与第一阶段项目一样，由LTS磁铁和高温超导插件组成的磁体配置适合于这个三阶段项目的每个阶段，是有效的，可以在2008年12月完成高分辨率1 GHz LTS/HTS核磁共振磁体。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、高场强的核磁共振磁体只能通过渐进的步骤来实现，就像我们的三个阶段计划一样。目前最先进的超导磁体技术，以及LTS和HTS预计在未来几年内的技术进步，使得这种刻苦的循序渐进的方法几乎成为实现1 GHz核磁共振磁体的最终目标的必由之路。所有三个HTS插件都将是双薄饼线圈，每个线圈都缠绕着Bi-2223/Ag。插入件2的设计已经修改和更新，纳入了插入件1的性能结果，插入件1是第一阶段系统的高温超导插入件，目前处于计划的最后几个月。这一拟议的第二阶段计划继续第一阶段计划，并为第三阶段计划做准备。由于插入件2的存在，第二阶段系统将在驱动模式下运行，除了展示在1 GHz下运行的终极版本的概念验证外，它将不是用于长期使用的高效核磁共振磁体，与目前商业上现成的ALI-LTS 675 MHz/55 mm核磁共振磁体相比。在第二阶段的最后几个月，该系统将被转换成高分辨率的ALI-LTS 600 MHz/125 mm核磁共振磁体，并转移到FBML的核磁共振小组。 与第一阶段计划一样，第二阶段计划的意义有两个方面：1)高分辨率LTS/HTS核磁共振磁体的成功运行；2)成功展示了针对插入件2采用的关键设计原则和理念，该插入件已根据插入件1的最新结果对原始设计进行了修改。我们预计将使用插入件2的性能结果来优化插入件3的设计。