论文标题
部分可观测时空混沌系统的无模型预测
Fe-based high field superconductors for cost-effective future accelerator magnets
论文作者
论文摘要
我们提出了针对将Fe的超导体（FBS）AEFE2AS2（122）（AE = AE =碱性Earth，ba或sr）组成的目标攻击，成为更便宜，更高的稳定性余量，圆形，圆形，有效的以及有效的异位多型多膜导体，适用于16-20 T Dipole Magnet构造。这份白皮书敦促通过对控制临界电流密度（122多晶的运输临界电流密度）的基本了解，从而极大地加速了进步。高谷物到颗粒的JC是在这个新的超导体中尚未完全证明的关键属性，这是使122个实用的关键突破。尽管内部（即涡旋固定）JC已经足够替代NB3SN，但我们最近的工作强烈表明，在晶界（GBS）处于晶粒边界（GBS）的不可预测的超导连通性是限制远距离JC的关键问题。我们强烈强调需要在关注电线制造之前评估多晶形式中GB的真正内在性质。
We propose a targeted attack on making the Fe-based superconductor (FBS) AEFe2As2 (122) (AE = alkaline earth, here Ba or Sr) into a much cheaper, higher stability margin, round, twisted and effectively isotropic multifilament conductor suitable for 16-20 T dipole magnet construction. This white paper urges to greatly accelerate progress by providing a fundamental understanding of what controls the transport critical current density, Jc, of 122 polycrystals and then in the wire forms. High grain-to-grain Jc is the one key property not yet fully demonstrated in this new superconductor and this is the key breakthrough that would make 122 practical. Whereas the intragrain (i.e. vortex pinning) Jc is already high enough to replace Nb3Sn, our recent work strongly suggests that unpredictable superconducting connectivity at grain boundaries (GBs) is the critical problem that limits the long-range Jc. We strongly emphasize the need to evaluate the true intrinsic nature of GBs in the polycrystalline forms before focusing on the wire fabrication.
