HTS COIL TECHNOLOGY FOR MAGNETIC RESONANCE SYSTEMS

研究人员建议准备测试 开发一种高温超导陶瓷线的形式， 通过构建和缠绕原型， 陶瓷的反应点，如他们的进一步描述， 摘要： “ATC建议开发一种电缆导管导体， 温度超导体（BSCCO 2212）用于未来的高场MR， 磁体在医学研究和临床实践中的应用。 ATC电缆设计 独特地解决了困扰所有努力的三个基本问题 迄今为止，为了使这种脆性材料适应实际应用： * 它控制电缆内的应力，使BSCCO能够保持其完整的 超导电流密度， * 它控制线圈内电缆之间的应力， 通过线圈外壳积聚， * 它提供了在反应烘烤期间均匀加热线圈， 非常严格的温度调节和氧气供应 线圈， * 它提供了完成的盘管的内部制冷， 消除了大部分的成本和复杂性， 传统的低温技术 这些问题一直制约着高温超导实用化的发展 用于高场应用的线圈。 ATC的指挥首先会 时间使这种线圈可行。 “建议的第一期工程将支援 电缆及其制造过程，以及实际制造和测试 “绿色”状态电缆。 拟议的第二阶段后续项目将 通过优化反应烘烤、卷取 绕制和完成原型线圈。 线圈将被测试 以评估它们在MR应用中的性能。" 拟议的商业应用： 拟议中的超导电缆将真正彻底改变 高场磁体的成像和光谱能力。没有 如果没有人知道如何利用高温制造高磁场磁铁， 超导体 有了它的领域25特斯拉的光谱应该是 可能的，紧凑的线圈用于特殊用途的成像。

The investigators propose to prepare to test the feasibility of developing a form of high temperature superconducting ceramic wire in the form of a cable in a conduit by building and winding a prototype up to the point of reacting the ceramic, as further described by their abstract: "ATC proposes to develop a cable-in-conduit conductor using high- temperature superconductor (BSCCO 2212) for use in future high-field MR, magnets in medical research and clinical practice. ATC's cable design uniquely solves three fundamental problems which have plagued all efforts to date to adapt this brittle material to practical applications: * it controls stress within the cable so the BSCCO can retain its full superconducting current density, * it controls stress between cables within a coil so that it cannot accumulate through a coil shell, * it provides for uniformly heating the coil during reaction bake with extremely tight temperature regulation and availability of O2 throughout the coil, * it provides for internal refrigeration of the completed coil, eliminating most of the cost and complexity associated with more conventional cryogenics. These problems have so far inhibited the development of practical HTS coils for high-field applications. ATC's conductor would for the first time make such coils feasible. "The proposed Phase I project would support the detailed design of the cable and its fabrication process, and actual fabrication and testing of the "green" state cable. The proposed follow-on Phase II project would carry the development through optimization of reaction bake, coil winding, and completion of prototype coils. The coils would be tested in background field to evaluate their performance for MR applications." PROPOSED COMMERCIAL APPLICATIONS: The proposed superconducting cable would truly revolutionize the capabilities of high-field magnets for imaging and spectroscopy. Without it no one knows how to make a highfield magnet using high-temperature superconductors. With it fields of 25 Tesla for spectroscopy should be possible, and compact coils for special-purpose imaging.