A critical component of the 1.3-GHz nuclear magnetic resonance magnet (1.3 G) program, currently ongoing at the Francis Bitter Magnet Laboratory, Plasma Science and Fusion Center, Massachusetts Institute of Technology, and now approaching its final stage, is the all high-temperature superconductor 800-MHz insert (H800). The insert consists of three nested double-pancake (DP) coils fabricated with 6-mm-wide REBCO conductor. Coil 1, the innermost coil of H800, has already been fabricated and tested at 77 and 4.2 K. In addition, one third of the DPs for Coil 2 have been wound and each DP individually fully tested. Work described here includes details of Coil 1 fabrication: DP winding, DP testing, assembling, joint performance, overbanding, and coil testing; winding details of DPs for Coil 2 and their testing are also included.

中文翻译：

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用于 1.3-GHz LTS/HTS NMR 磁体计划的 800-MHz 全 REBCO 插入物——进度报告

1.3 GHz 核磁共振磁体 (1.3 G) 计划的一个关键组成部分，目前在麻省理工学院等离子科学与聚变中心的弗朗西斯苦磁实验室进行，目前已接近最后阶段，它是全高-温度超导体 800-MHz 插入 (H800)。该插件由三个嵌套的双薄饼 (DP) 线圈组成，这些线圈由 6 毫米宽的 REBCO 导体制成。线圈 1 是 H800 的最里面的线圈，已经在 77 和 4.2 K 下进行了制造和测试。此外，线圈 2 的三分之一的 DP 已经缠绕，并且每个 DP 都单独进行了全面测试。此处描述的工作包括线圈 1 制造的详细信息：DP 绕组、DP 测试、组装、接头性能、overbanding 和线圈测试；还包括线圈 2 的 DP 的绕组详细信息及其测试。