The 40 T Superconducting Magnet Project at the National High Magnetic Field Laboratory
The 40 T Superconducting Magnet Project at the National High Magnetic Field Laboratory
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DOI：
10.1109/tasc.2020.2969642
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发表时间：
2020-06-01
影响因子：
1.8
通讯作者：
Boebinger, Greg S.
中科院分区：
文献类型：
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作者：
Bai, Hongyu;Bird, Mark D.;Boebinger, Greg S.
国家高磁场实验室启动了一项创新项目，开发40 &x00A0;T全超导用户磁体。第一年的资金由国家科学基金会于2018年9月授予。考虑到40 & x 00 A0;T超导用户磁体，设定了34 mm冷孔的目标规格，在直径为1 cm的球形体积上具有500 ppm的均匀性，优于0.01 & x 00 A0;T的设定能力和稳定性，并且具有在其20年设计寿命内斜升到全场50，000次的能力。它将是一个完全超导的磁铁，可以承受在其完整的40 T场失超，并提供一个非常低的噪音环境的实验。这些功能将使40 &x00A0;T SC磁体能够支持比当今电阻和混合磁体更高灵敏度的测量;高磁场测量将能够独特地解决凝聚态物理学中一些扩展前沿的物理问题。一个40 & x 00 A0;T SC磁铁将使更多的用户运行长时间的实验在峰值场与低得多的功耗相比，电阻和混合磁铁。然而，实现这样一个40 "T SC磁铁需要磁铁技术远远超出目前的最先进的。不同的HTS磁铁设计的初步分析，基于三个目前可行的HTS导体：REBCO，Bi-2212，和Bi-2223，已经确定，每种技术面临着重大的挑战。因此，我们决定并行开发由绝缘REBCO、无绝缘REBCO、Bi-2212和Bi-2223组成的四种高温超导磁体技术，并在研发阶段弥合基于主要风险的技术差距。候选技术将在决策点上缩小范围。介绍了40 × 00 A0;T全超导用户磁体项目的目标和研发活动。
The National High Magnetic Field Laboratory has launched an innovative project to develop a 40 & x00A0;T all superconducting user magnet. The first year funding was awarded by the National Science Foundation in September 2018. Consideration of a 40 & x00A0;T superconducting user magnet sets target specifications of a cold bore of 34 mm with a homogeneity of 500 ppm over a 1 cm diameter of spherical volume, a better than 0.01 & x00A0;T set-ability and stability, and with an ability to ramp up to full field 50,000 times over its 20 years design lifetime. It will be a fully superconducting magnet that can withstand quenches at its full 40T field and provide a very low noise environment for experimentalists. These capabilities will enable the 40 & x00A0;T SC magnet to support higher-sensitivity measurements than possible in present-day resistive and hybrid magnets; high-magnetic-field measurements that will be uniquely capable of addressing physics questions on a number of expanding frontiers in condensed matter physics. A 40 & x00A0;T SC magnet would enable more users to run long experiments at peak field with much less power consumption compared with resistive and hybrid magnets. However, realization of such a 40 & x00A0;T SC magnet requires magnet technology well beyond the present state-of-the-art. Initial analysis of different HTS magnet designs, based upon the three presently viable HTS conductors: REBCO, Bi-2212, and Bi-2223, has determined that each technology faces significant challenges. Hence, we decided that four HTS magnet technologies consisting of Insulated REBCO, No-Insulation REBCO, Bi-2212, and Bi-2223 would be developed in parallel and technology gaps based on major risks will be closed in the R & D phase. The candidate technologies will be narrowed down at the decision points. The objective and R & D activities of the 40 & x00A0;T all superconducting user magnet project are presented.