Progress of ultra-high-field superconducting magnets in China

Wang, Qiuliang; Liu, Jianhua; Zheng, Jinxing; Qin, Jinggang; Ma, Yanwei; Xu, Qingjin; Wang, Dongliang; Chen, Wenge; Qu, Timing; Zhang, Xingyi; Jiang, Donghui; Wang, Yaohui; Zhou, Benzhe; Qin, Lang; Jin, Huan; Liu, Huajun; Zhai, Yujia; Feng, Liang

doi:10.1088/1361-6668/ac3f9b

Cited by 37 publications

(15 citation statements)

References 85 publications

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“…High temperature superconductors are attractive because their high critical temperature (Tc) enables them to be used at high temperature and outperform standard superconductors in terms of magnetic field performance [1,2]. However, the limiting factor is the ability of arresting the motion of Abrikosov vortices at very high critical current.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic approach for enhancing superconducting critical current performance

et al. 2022

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The addition of artificial pinning centers has led to an impressive increase in the critical current density (Jc) of superconductors, enabling record-breaking all-superconducting magnets and other applications. The Jc of superconductors has reached ~0.2–0.3 Jd, where Jd is the depairing current density, and the numerical factor depends on the pinning optimization. By modifying λ and/or ξ, the penetration depth and coherence length, respectively, we can increase Jd. For (Y0.77Gd0.23)Ba2Cu3Oy ((Y,Gd)123), we can achieve this by controlling the carrier density, which is related to λ and ξ. We can also tune λ and ξ by controlling the chemical pressure in Fe-based superconductors, i.e., BaFe2(As1−xPx)2 films. The variation in λ and ξ leads to an intrinsic improvement in Jc via Jd, allowing extremely high values of Jc of 130 MA/cm2 and 8.0 MA/cm2 at 4.2 K, consistent with an enhancement in Jd of a factor of 2 for both incoherent nanoparticle-doped (Y,Gd)123 coated conductors (CCs) and BaFe2(As1−xPx)2 films, showing that this new material design is useful for achieving high critical current densities in a wide array of superconductors. The remarkably high vortex-pinning force in combination with this thermodynamic and pinning optimization route for the (Y,Gd)123 CCs reached ~3.17 TN/m3 at 4.2 K and 18 T (H||c), the highest values ever reported for any superconductor.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic approach for enhancing superconducting critical current performance

et al. 2022

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“…In addition, long tapes up to [38] and none of wire manufacturers are working on development. Recently, the development of long length (Ba,K)122 tapes for high-field applications has been promoted at CAS [39]. Thin films of iron-based superconductors also show high J c characteristics.…”

Section: Candidates Of New Superconducting Materialsmentioning

confidence: 99%

“…In addition, long tapes up to 100 m have been fabricated only at Chinese Academy of Sciences (CAS) [38] and none of wire manufacturers are working on development. Recently, the development of long length (Ba,K)122 tapes for high‐field applications has been promoted at CAS [39].…”

Section: Current Status Of Hts Superconducting Materialsmentioning

confidence: 99%

Current Status of High Temperature Superconducting Materials and their Various Applications

Shimoyama,

Motoki

2023

IEEJ Transactions Elec Engng

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It took longer time than initially expected for development of cuprate superconducting materials for practical applications. However, there are about 20 companies that manufacture and supply long conductors and bulk materials at present. Although various large‐scale projects have supported the process of material development, material and equipment developments have been progressing under the leadership of manufacturers in recent years. In this paper, current status of development of high‐temperature superconducting materials, including MgB2, which is classified as a high temperature superconductor, and their applications are summarized, along with the history, basic physical features and recent topics. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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“…At present, the high field insert coil technology represents a crucial approach to achieving a stable state of strong magnetic field condition. Numerous fully superconducting magnets worldwide adopt the configuration of high-temperature superconducting coils inserted into lowtemperature superconducting magnets [16,17].…”

Section: Introductionmentioning

confidence: 99%

Development of the first Tesla class iron-based superconducting coil for high field application

Ding,

Zhao,

Huang

et al. 2023

Supercond. Sci. Technol.

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This study has, for the first time, combined iron-based superconductor (IBS) with high field insert coil technology to generate a higher magnetic field. Nine large-sized iron-based superconducting double pancake coils were fabricated and their performance was evaluated at 4.2 K. Subsequently, seven double pancake coils with superior performance were assembled to form an IBS insert coil and tested at the 20T background field. The test results indicate that the insert coil successfully generated above 1T magnetic field under the 0T, 10T, and even 20T background field, respectively. Notably, the poorest IBS double pancake coil still had a critical current of about 84A at the background field of 20T, which outperformed all previously reported performance tests of IBS coils. This paper provides a detailed introduction to the design and fabrication process of the IBS insert coil, presents the test results, and discusses them.

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Progress of ultra-high-field superconducting magnets in China

Cited by 37 publications

References 85 publications

Thermodynamic approach for enhancing superconducting critical current performance

Thermodynamic approach for enhancing superconducting critical current performance

Current Status of High Temperature Superconducting Materials and their Various Applications

Development of the first Tesla class iron-based superconducting coil for high field application

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