LOW AND HIGH TEMPERATURE SUPERCONDUCTING NMR MAGNET

研究人员提出了一个三个阶段的计划，以发展高 用于低温超导体的高温超导插入线圈 用于核磁共振波谱的磁体，以提高其 工作场强达到23.5特斯拉，场强显然超过了 当前核磁共振磁体技术的局限性，如其进一步描述的那样 摘要： “这个为期18个月的三期工程第一期计划的具体目标是 高分辨率LTS/HTS核磁共振磁体的完成--可能是它的第一个 在拟议的完成日期(2001年9月)--通过合并一个 FBML上现有的LTS背景磁体和一个HTS插件将被 在FBML设计和制造。这一分三个阶段的倡议提出了实现 最终目标是在12月前研制出52 mm RT孔高分辨率1 GHz核磁共振磁体 2004年。我们认为这一最终目标只有通过 成功完成第一阶段和第二阶段。在每个阶段将有一个LTS/HTS单元 基于基本相同的设计原则和理念建造。阶段1 目标是450兆赫，第二阶段的目标是700-800兆赫。 第一阶段计划的意义在于两个方面：1)成功 高分辨率LTS/HTS核磁共振磁体的运行；2)成功演示 主要设计原则和理念--BSCCO-2223/Ag(合金)带和 双薄饼线圈配置--1号插件采用，也将 根据需要，在第一阶段完成后，在第二阶段和第三阶段进行细化。 请注意，这两个方面都是实现1的最终目标的关键要素 GHz。 虽然额定频率仅为450兆赫，并将在很短的时间内运行 产生核磁共振信号，这个高分辨率的LTS/HTS系统应该验证我们的 在12月前实现1 GHz目标的基本设计原则和理念 2004年。因为FBML最初的500个单位曾经是第一个高分辨率的 核磁共振磁体清除500 MHz标志，也许它会恰如其分地如果它的 复活--一种高分辨率的LTS/HTS核磁共振磁体--成为它的第一个 亲切。“

The investigators propose a three stage plan for developing a high temperature superconducting insert coil for a low temperature superconductor magnet for nuclear magnetic resonance spectroscopy in order to boost its working field strength to 23.5 Tesla, a field strength evidently beyond the limits of current NMR magnet technology, as further described by their abstract: "The specific aim of this 18-month Phase 1 program of a 3-Phase project is the completion of a high-resolution LTS/HTS NMR magnet--possibly the first of its kind at the proposed completion date (September 2001)--by integration of an existing LTS background magnet available at FBML and an HTS insert to be designed and built at FBML. This 3-phase initiative proposes to achieve the ultimate goal of a 52-mm RT bore high-resolution 1 GHz NMR magnet by December 2004. We believe that this ultimate goal is attainable only through the successful completion of Phases 1 and 2. In each phase an LTS/HTS unit will be built based on essentially the same design principles and philosophy. Phase 1 targets 450 MHz and Phase 2 targets the range 700-800 MHz. "The significance of the Phase 1 program is in two areas: 1) successful operation of a high-resolution LTS/HTS NMR magnet; 2) successful demonstration of key design principles and philosophy--BSCCO-2223/Ag (alloy) tape and double-pancake coil configuration--adopted for Insert #1 that will also be followed, and, if needed, refined in Phases 2 and 3 upon completion of Phase 1. Note that both areas are critical ingredients to achieve the ultimate goal of 1 GHz. "Although rated only at 450 MHz and to be operated for a brief period to generate NMR signals, this high-resolution LTS/HTS system should validate our basic design principles and philosophy to achieve the 1 GHz goal by December 2004. Because the original 500 unit at FBML was once the first high-resolution NMR magnet to clear the 500 MHz mark, perhaps it would be justly apt if its resurrection--a high-resolution LTS/HTS NMR magnet--becomes the first of its kind."