An apparatus has been built to perform irradiation and electrical testing of REBCO coated conductors (CC) held below their critical temperature (T _c). Patterned tracks of Fujikura GdBCO CC were irradiated with 2 MeV He⁺ ions in steps up to 4 mdpa whilst held at 40 K, and the critical current density (J _c) determined from I–V characteristics. These ‘in-situ’ samples then underwent annealing experiments at room temperature. The superconducting performance, both before and after room temperature annealing, has been compared to equivalent samples irradiated at room temperature and then cooled for testing at 40 K to understand how the damage tolerance of these materials is affected by sample temperature. Details of the apparatus and experimental results from preliminary work are presented and discussed. These preliminary results show that both T _c and J _c values of patterned tracks degrade with irradiation dose, with most samples showing similar behaviour. The room temperature annealing of ‘in-situ’ irradiated samples resulted in a significant recovery of properties. We conclude that irradiation temperature does alter how the superconducting properties of GdBCO CC are affected by ion irradiation, and that this observation has implications for the design of high temperature superconducting magnets for future fusion reactors.

一种装置，已建成进行照射和低于其临界温度（保持REBCO涂覆导体（CC）的电气测试Ť _Ç）。Fujikura GdBCO CC 的图案轨迹在保持在 40 K 的情况下用 2 MeV He ⁺离子以高达 4 mdpa 的步长照射，临界电流密度 ( J _c ) 由I-V特性确定。这些就地'样品然后在室温下进行退火实验。将室温退火前后的超导性能与在室温下辐照然后在 40 K 下冷却进行测试的等效样品进行了比较，以了解这些材料的损伤容限如何受样品温度的影响。介绍和讨论了设备的细节和初步工作的实验结果。这些初步结果表明，图案化轨迹的T _c和J _c值都随着辐照剂量而降低，大多数样品表现出相似的行为。'原位室温退火' 辐照样品导致性能显着恢复。我们得出结论，辐照温度确实改变了 GdBCO CC 的超导特性如何受到离子辐照的影响，并且这一观察结果对未来聚变反应堆的高温超导磁体的设计具有影响。