Journal ArticleDOI
A Small 1.5 T Persistent Current Operating Test Magnet Using ${\rm MgB}_{2}$ Wire With High $j_{\rm c}$ Joints
Xiaohang Li,Dong Zhang,Jingye Zhang,Zhaoshun Gao,Shaotao Dai,Zhifeng Zhang,Dong Xia,Guomin Zhang,Dongliang Wang,Yanwei Ma,Liangzhen Lin,Liye Xiao +11 more
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TLDR
In this article, a persistent current (PC) operating magnet with bore diameter of about 32 mm was designed and developed based on multi-and mono-filament MgB2 wires.Abstract:
Persistent current (PC) operating magnet with bore diameter of about 32 mm was design and developed based on multi- and mono-filament MgB2 wires. The magnet was in a multi-solenoid structure. One pilot coil was wound and joints were fabricated at both ends, connecting it to a superconducting switch for PC operation tests. The magnet was to demonstrate the high field and high temperature performance at different temperatures. Numerical and experimental results demonstrated a promising future of MgB2 wires in low cost magnetic resonance imaging (MRI) systems and high field scientific magnets.read more
Citations
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Persistent current joints between technological superconductors
TL;DR: In this article, a review of progress made to date on the production and characterization of persistent current joints between the five major technological superconductors (NbTi, Nb3Sn, MgB2, BiSCCO and REBCO) is presented.
Journal ArticleDOI
Conduction cooled magnet design for 1.5 T, 3.0 T and 7.0 T MRI systems
TL;DR: In this article, electromagnetic designs for conduction cooled main magnets over the range of medium field strengths (1.5 T) to ultra high field strength (7.0 T) are presented.
Journal ArticleDOI
A persistent-mode 0.5 T solid-nitrogen-cooled MgB2 magnet for MRI.
Jiayin Ling,Jiayin Ling,John P. Voccio,John P. Voccio,Seungyong Hahn,Seungyong Hahn,Timing Qu,Timing Qu,Juan Bascunan,Yukikazu Iwasa +9 more
TL;DR: Persistent-current switches were successfully operated in solid nitrogen for ramping the magnet and were also designed to absorb magnetic energy in a protection mechanism; its effectiveness was evaluated in an induced quench.
Journal ArticleDOI
MgB2 superconducting joints for persistent current operation
Dipak Patel,Shahriar A. Hossain,Khay Wai See,Xun Xu,Shaon Barua,Zongqing Ma,Seyong Choi,Mike Tomsic,Jung Ho Kim +8 more
TL;DR: In this paper, the authors proposed a concept and fabrication of superconducting joints, which yielded reliable performance in the operating temperature range of 4.2-25 K. The critical current capacity and joint resistance were precisely evaluated by the standard four-probe method in open-circuit and by fielddecay measurements in a closed-loop, respectively.
Doping with a special carbohydrate, C9H11NO, to improve the Jc-B properties of MgB2 tapes (強磁場超伝導の研究--低温超伝導体)
現平 張,D. L. Wang,召順 高 +2 more
TL;DR: In this article, a significant improvement in Jc at both 4.2 and 20 K has been achieved for MgB2 tapes using C9H11NO as a dopant.
References
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Journal ArticleDOI
Prospects for MgB2 superconductors for magnet application
TL;DR: In this article, the authors discuss the potential of MgB2 superconductors for practical magnet applications vis-?-vis the intermetallic low (LTS) and high temperature superconductor (HTS) cuprates.
Journal ArticleDOI
Development of ex situ processed MgB2 wires and their applications to magnets
TL;DR: In spite of the relatively short time dedicated to the development of magnesium diboride conductors since its discovery in early 2001, a substantial improvement was soon achieved in their manufacture and use as discussed by the authors, and it is now possible to start seriously thinking about a systematic industrial production of this material, as it is already possible to purchase it in reasonable lengths on the free market.
Journal ArticleDOI
Design, Construction and Tests of MgB2 Coils for the Development of a Cryogen Free Magnet
M. Modica,S. Angius,L. Bertora,D. Damiani,M. Marabotto,Davide Nardelli,M. Perrella,M. Razeti,M. Tassisto +8 more
TL;DR: In this article, a double pancake coil was produced by winding a single length of MgB2, 1600 m long, multifilamentary stabilized tape, and tested in a cryogen free apparatus.
Journal ArticleDOI
A 0.6 T/650 mm RT Bore Solid Nitrogen Cooled $rm MgB_2$ Demonstration Coil for MRI—a Status Report
TL;DR: Details of the MgB2 conductor, winding process, and preliminary theoretical analysis of the current-carrying performance of the conductively cooled coils in zero background field and over the 10-30 K temperature range are presented.
Journal ArticleDOI
High critical current joint of MgB2 tapes using Mg and B powder mixture as flux
Xue Li,Liyang Ye,Mingjian Jin,Xiaoji Du,Zhaoshun Gao,Zhan Zhang,L Q Kong,Xiaole Yang,Liye Xiao,Y. Ma +9 more
TL;DR: In this article, a joining method using a Mg and B powder mixture as flux is proposed, and the voltage-current curves of the sample joints made by such a method were measured using the four-probe method.