REBa 2 Cu 3 O 7−δ (REBCO) composite tapes are candidate conductors for future accelerator magnets. Given that REBCO is a brittle oxide film, stress/strain management is important in the mechanical design of a magnet. Therefore, the strain state of a superconducting film should be predicted under various operating conditions. A quantum beam is a useful tool in evaluating the strain state of a superconducting material in a composite conductor. Although various cryogenic tensile testing machines, in combination with neutron beam and synchrotron radiation, have been developed, they are not necessarily optimized for measuring highly textured materials such as REBCO films. This study reports a novel cryogenic tensile testing apparatus that can be used at the beamline of a synchrotron radiation facility. In this system, a superconducting tape is cooled using a Gifford–McMahon (GM) cryocooler through 2.5 m long thermal links made of 5 N high-purity aluminum. ...

中文翻译：

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REBCO复合导体用同步辐射测量晶格应变的低温拉伸测试仪的研制

REBa 2 Cu 3 O7-δ（REBCO）复合带是未来加速器磁体的候选导体。考虑到REBCO是脆性的氧化膜，应力/应变管理在磁体的机械设计中很重要。因此，应该在各种操作条件下预测超导膜的应变状态。量子束是评估复合导体中超导材料应变状态的有用工具。尽管已经开发出各种低温拉伸试验机，结合中子束和同步加速器辐射，但并不一定为测量高织构材料（例如REBCO薄膜）而进行了优化。这项研究报告了一种新型的低温拉伸测试设备，该设备可用于同步辐射装置的光束线。在这个系统中 超导带使用Gifford-McMahon（GM）低温冷却器通过5 m高纯铝制成的2.5 m长的热链接进行冷却。...