Design of a Tabletop Liquid-Helium-Free 23.5-T Magnet Prototype towards 1-GHz Microcoil NMR [0.03%]
一种桌面型无液氦23.5T magnets超导磁体的方案设计及1GHz微线圈核磁共振研究
Dongkeun Park,Yoon Hyuck Choi,Yukikazu Iwasa
Dongkeun Park
We present a design study of a liquid-helium (LHe)-free 23.5-T, ϕ25-mm RT-bore REBCO magnet for high-resolution 1-GHz microcoil nuclear magnetic resonance (NMR) spectroscopy. A microcoil NMR magnet is compact and thus its cost will be less...
MIT 1.3-GHz LTS/HTS NMR Magnet: Post Quench Analysis and New 800-MHz Insert Design [0.03%]
MIT 1.3 GHz LTS/HTS核磁共振磁体的失超分析及新的800 MHz插入线圈设计
Dongkeun Park,Juan Bascuñán,Philip C Michael et al.
Dongkeun Park et al.
We present post-quench analyses of the MIT 800-MHz REBCO insert magnet (H800), unexpectedly quenched during operation in March 2018, and design study of a new 800-MHz HTS insert (H800N). The as-wound H800 was supposed to contribute 18.7 T a...
W S Marshall,M D Bird,A Godeke et al.
W S Marshall et al.
Recently, significant improvement in the strain tolerance of Bi-2223 conductor has been achieved by lamination with high strength nickel alloy. The conductor, supplied by Sumitomo Electric and designated Type HT-NX, is now commercially avai...
Experimental Study on Potential Heat Treatment Issues of Large Bi-2212 Coils [0.03%]
大型Bi-2212线圈热处理潜在问题的实验研究
P Chen,U P Trociewitz,J Lu et al.
P Chen et al.
The route to 30 T NMR endorsed by a recent National Academy report clearly still has many challenges to achieve high stability and homogeneous high temperature superconducting (HTS) magnet. As the only HTS conductor with round wire (RW) geo...
Modeling Strategies for Superconducting Microstrip Transmission Line Structures [0.03%]
用于超导微带传输线结构的建模策略
Kongpop U-Yen,Karwan Rostem,Edward J Wollack
Kongpop U-Yen
Strategies are explored to reduce the electromagnetic simulation time of electrically large superconducting transmission line structures while retaining model accuracy. The complex surface reactance of an infinite thin-film superconducting ...
HTS Shim Coils Energized by a Flux Pump for the MIT 1.3-GHz LTS/HTS NMR magnet: Design, Construction, and Results of a Proof-of-Concept Prototype [0.03%]
MIT的1.3GHz低温超导/高温超导NMR磁体中由磁通泵励磁的HTS补偿绕组：概念验证原型的设计、制作和结果
Dongkeun Park,Jiho Lee,Juan Bascuñán et al.
Dongkeun Park et al.
In this paper we present design, construction, and preliminary results of a proof-of-concept prototype of high-temperature superconductor (HTS) shim coils operated at 77 K and energized, for the first time among all shim coils, by a flux pu...
Fabrication and Testing of a Bi-2223 Test Coil for High Field NMR Magnets [0.03%]
高温高场核磁共振用Bi-2223测试线圈的研制与性能测试
W S Marshall,M D Bird,D C Larbalestier et al.
W S Marshall et al.
In 2005 the Committee on Opportunities in High Magnetic Fields (COHMAG) issued a challenge to develop a 30 T high-resolution NMR magnet. In response, the National High Magnetic Field Laboratory (NHMFL) is investigating all three commerciall...
A REBCO Persistent-Current Switch, Immersed in Solid Nitrogen, Operating at Temperatures near 10 K [0.03%]
一根浸没于固态氮中的REBCO恒定电流开关在接近10K的温度下运行
Philip C Michael,Jiho Lee,John Voccio et al.
Philip C Michael et al.
We present design and test results for a thermally-activated persistent-current switch (PCS) applied to a double pancake (DP) coil (151 mm ID, 172 mm OD), wound, using the no-insulation (NI) technique, from a 120-m long, 76-μm thick, 6-mm ...
A Field-Shaking System to Reduce the Screening Current-Induced Field in the 800-MHz HTS Insert of the MIT 1.3-GHz LTS/HTS NMR Magnet: A Small-Model Study [0.03%]
MIT 1.3 GHz LTS / HTS NMR磁体的800 MHz HTS插入线圈中减少筛选电流引起的场的研究：小型模型研究
Jiho Lee,Dongkeun Park,Philip C Michael et al.
Jiho Lee et al.
In this paper, we present experimental results, of a small-model study, from which we plan to develop and apply a full-scale field-shaking system to reduce the screening current-induced field (SCF) in the 800-MHz HTS Insert (H800) of the MI...
Construction and Test Results of Coils 2 and 3 of a 3-Nested-Coil 800-MHz REBCO Insert for the MIT 1.3-GHz LTS/HTS NMR Magnet [0.03%]
麻省理工学院1.3 GHz LTS / HTS NMR磁体的3层线圈可重构二、三线圈单元的制造与测试结果
Dongkeun Park,Juan Bascuñán,Philip C Michael et al.
Dongkeun Park et al.
We present construction and test results of Coils 2 and 3 of a 3-coil 800-MHz REBCO insert (H800) for the MIT 1.3 GHz LTS/HTS NMR magnet currently under construction. Each of three H800 coils (Coils 1-3) is a stack of no-insulation REBCO do...