A no-insulation (NI) technique has been applied to wind and test a NI HTS (YBCO) double-pancake coil at 4.2 K. Having little detrimental effect on field-current relationship, the absence of turn-to-turn insulation enabled the test coil to survive a quench at a coil current density of 1.58 kA/mm2. The NI HTS coil is compact and self-protecting, two features suitable for large high-field magnets. To investigate beneficial impacts of the NI technique on >;1 GHz LTS/HTS NMR magnets, we have designed six new NI HTS inserts for our ongoing 1.3 GHz LTS/HTS NMR magnet, which require less costly LTS background magnets than the original insulated HTS insert. A net result will be a significant reduction in the overall cost of an LTS/HTS NMR magnet, at 1.3 GHz and above.

中文翻译：

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无绝缘 (NI) HTS 插入件，价格 > 1 GHz LTS/HTS NMR 磁体

无绝缘 (NI) 技术已应用于在 4.2 K 下缠绕和测试 NI HTS (YBCO) 双扁平线圈。由于没有匝间绝缘，对场电流关系几乎没有有害影响，因此能够实现测试线圈在线圈电流密度为 1.58 kA/mm2 时能否耐受失超。NI HTS 线圈结构紧凑且具有自我保护功能，这两个特性适用于大型高磁场磁体。为了研究 NI 技术对 >1 GHz LTS/HTS NMR 磁体的有益影响，我们为我们正在进行的 1.3 GHz LTS/HTS NMR 磁体设计了六个新的 NI HTS 插入件，与原始绝缘 HTS 相比，它需要更便宜的 LTS 背景磁体插入。最终结果将是 1.3 GHz 及以上的 LTS/HTS NMR 磁体的总体成本显着降低。