HTS Pancake Coils Without Turn-to-Turn Insulation
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TLDR
The new NI winding offers HTS coils enhanced performance in three key parameters: overall current density; thermal stability; and mechanical integrity.Abstract:
This paper reports a study of HTS pancake coils without turn-to-turn insulation. Three no-insulation (NI) pancake coils were wound: each single and double pancake coil of Bi2223 conductor and one single pancake of ReBCO conductor. An equivalent electrical circuit for modeling NI coils was verified by two sets of test: 1) charge-discharge; and 2) sudden discharge. Also, an overcurrent test in which a current exceeding a coil's critical current by 2.3 times was performed, and analysed, to demonstrate that in terms of stability NI HTS coils outperform their counterparts. The new NI winding offers HTS coils enhanced performance in three key parameters: overall current density; thermal stability; and mechanical integrity.read more
Citations
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Journal ArticleDOI
45.5-tesla direct-current magnetic field generated with a high-temperature superconducting magnet
Seungyong Hahn,Seungyong Hahn,Kwanglok Kim,Kwangmin Kim,Xinbo Hu,T.A. Painter,Iain R. Dixon,Seokho Kim,Seokho Kim,Kabindra R. Bhattarai,Kabindra R. Bhattarai,So Noguchi,So Noguchi,Jan Jaroszynski,David C. Larbalestier,David C. Larbalestier +15 more
TL;DR: A copper oxide high-temperature superconductor magnet generates a direct-current magnetic field of 45.5 tesla—the highest value reported so far—using a design that enables operation at high current densities, validates predictions11 for high-field copper oxide super Conductor magnets by achieving a field twice as high as those generated by low-tem temperature superconducting magnets.
Journal ArticleDOI
Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil
Xudong Wang,Seungyong Hahn,Young-Jae Kim,Juan Bascunan,John P. Voccio,Haigun Lee,Yukikazu Iwasa +6 more
TL;DR: Experimental and analytical studies on the characteristic resistance of NI (no-insulation) ReBCO pancake coils, which are used in an equivalent circuit model to characterize 'radial as well as spiral' current paths within the NI coils, identified turn-to-turn contact resistance as a major source of the characteristic Resistance of an NI coil.
Journal ArticleDOI
26 T 35 mm all-GdBa2Cu3O7–x multi-width no-insulation superconducting magnet
TL;DR: A 26 T 35 mm winding diameter all-GdBa2Cu3O (GdBCO) magnet was designed by the MIT Francis Bitter Magnet Laboratory, and constructed and tested by the SuNAM Co., Ltd as discussed by the authors.
Journal ArticleDOI
Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors
Carmine Senatore,M. Alessandrini,Andrea Lucarelli,Riccardo Tediosi,Davide Uglietti,Yukikazu Iwasa +5 more
TL;DR: The goal is to illustrate a close synergetic relationship between evolution of high-field magnets and advancement in superconductor technology.
Journal ArticleDOI
Recent Developments in High-Temperature Superconducting Magnet Technology (Review)
TL;DR: In this paper, the authors reviewed recent progress in overcoming these technological problems for high temperature superconducting magnet (HTS magnet technology) and REBCO magnet technology, especially in the case of REBCo conductors, and concluded that the performance degradation due to excessive mechanical stresses applied along the longitudinal and transverse direction is the major problem for HTS magnet.
References
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Journal ArticleDOI
A 1.3-GHz LTS/HTS NMR Magnet– A Progress Report
TL;DR: Details of a 600 MHz HTS insert (H600) double pancake (DP) windings, composed of two concentric stacks of double pancakes, are presented, including conductor and coil parameters, winding procedure, DPs mechanical support and integration to the background 500 MHz LTS magnet.
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