Assessment of the performance of a 20 kA REBCO current lead

Zappatore, Andrea; Heller, R.; Savoldi, Laura; Zanino, Roberto

doi:10.1016/j.cryogenics.2018.09.003

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…This method is implemented afterwards to evaluate the leads' performance under different cooling options [37,38] and simulate the loss of flow accident [39]. Second, a thermal-hydraulic CURLEAD code based on the finite difference method (FDM) initially developed by KIT [40] has been applied to predict the operating parameters of kA-class binary current leads in steady mode [41,42] and pulsed mode [43,44]. Third, 2D and 3D models developed by the finite element method are also deployed to obtain detailed local thermal and magnetic field distributions of the final design before fabrication [33,[45][46][47].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, second-generation HTS superconductor material, such as YBCO tape, is attracting more and more attention from industry and has been utilized in many application areas due to its better mechanical properties and larger current capacity under high magnetic field. Therefore, it has become a favored candidate for HTS binary leads [44,[48][49][50][51]. However, the material composition and multilayer structure of YBCO tape differs from that of the first-generation Bi2223 material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Zheng

Liu

Song

et al. 2023

Supercond. Sci. Technol.

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A superconducting magnet system is developed for the application of high frequency gyrotrons at XXX. The operation cost for the magnet is dominated by refrigeration power. To reduce the heat load for cryogenic system, a pair of YBCO binary current leads is designed in consideration of the industrial concentration on type II high temperature superconducting (HTS) YBCO material. In this paper, a simulation model is proposed to perform the electromagnetic-thermal coupling analysis of these YBCO binary leads under different operation conditions by combining Partial Element Equivalent Circuit (PEEC) method and Finite Volume Method (FVM). The simulation code can improve computational efficiency and enable high-accuracy coupling between the electromagnetic field and heat transfer process. Under steady state, the heat leakage at 4.2 K cold end of YBCO binary leads depends mainly on the geometric parameters of YBCO tape, especially the cross-sectional area of the copper layer in YBCO tape. The cooling mode and liquid helium level also have a significant impact on the heat leakage level. The optimal outer diameter of the normal copper section is identified, and the optimum value is largely influenced by the effective cooling power imposed on the cold end of the normal copper section. Under transient state, the simulation for charging process and the loss of cooling accident are performed, along with the detailed analysis of the electromagnetic-thermal response features of the leads under these conditions. The results indicate that the YBCO binary current leads possess high thermal stability and an ample time margin for the magnet system to be demagnetized.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Zheng

Liu

Song

et al. 2023

Supercond. Sci. Technol.

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“…REBa2Cu3O7-x (REBCO) superconductors have been widely used in multiple fields, including motors [1], generators [2], cables [3], Superconducting magnetic energy storage (SMES) [4], current limiters [5], transformers [6], and current leads [7].…”

Section: Introductionmentioning

confidence: 99%

Systematic research on the effect of both positive and negative mismatch dopants in double-doped YBCO superconducting films

Xu¹,

Suo²,

Qureishy³

et al. 2021

Journal of the European Ceramic Society

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We report a novel doping strategy for YBa2Cu3O7-x (YBCO) superconducting films by using a positive mismatch, Ba2YNbO6 (BYNO), and a negative mismatch, LaAlO3 (LAO), imultaneously. Double doping can significantly reduce the c-strain in the YBCO film by canceling the strain between the two dopants. By systematically optimizing the doping amount of both BYNO and LAO, it was found that BYNO and LAO do not act equally. The microstructure and distribution of both BYNO and LAO were investigated with magneto-optic microscopy and scanning electron microscopy.The effect of BYNO and LAO on pinning was confirmed. The results of this study will help select appropriate positive mismatch and negative mismatch dopants, which is fundamental to the design and fabrication of pinning centers to fit different application scenarios.

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“…The development consisted of several tasks, i.e. investigations for the selection of stabilizer material [10], optimization and testing of mock-ups for the manufacturing of the 20 kA HTS module using REBCO tapes [11], extended test of the 20 kA REBCO CL, and finally modeling of the REBCO current in steady state and pulsed operation [12]. This paper describes the test results of the CL in steady state and pulsed mode as well as during quench.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Test results of a 20 kA high temperature superconductor current lead using REBCO tapes

Heller

Fietz

Gröner

et al. 2018

Supercond. Sci. Technol.

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The Karlsruhe Institute of Technology has developed a 20 kA high temperature superconductor (HTS) current lead (CL) using the second generation material REBCO, as industry worldwide concentrate on the production of this material. The aim was to demonstrate the possibility of replacing the Bi-2223/AgAu tapes by REBCO tapes, while for easy comparison of results, all other components are copies of the 20 kA HTS CL manufactured for the satellite tokamak JT-60SA. After the manufacture of all CL components including the newly developed REBCO module, the assembly of the CL has been executed at KIT and an experiment has been carried out in the CuLTKa test facility where the REBCO CL was installed and connected to a JT-60SA CL via a superconducting bus bar. The experiment covers steady state operation up to 20 kA, pulsed operation, measurement of the heat load at 4.5 K end, loss-of-flow-accident simulations, and quench performance studies. Here the results of these tests are reported and directly compared to those of the JT-60SA CL.

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Assessment of the performance of a 20 kA REBCO current lead

Cited by 8 publications

References 22 publications

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Systematic research on the effect of both positive and negative mismatch dopants in double-doped YBCO superconducting films

Test results of a 20 kA high temperature superconductor current lead using REBCO tapes

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Assessment of the performance of a 20 kA REBCO current lead

Cited by 8 publications

References 22 publications

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Systematic research on the effect of both positive and negative mismatch dopants in double-doped YBCO superconducting films

Test results of a 20 kA high temperature superconductor current lead using REBCO tapes

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Assessment of the performance of a 20 kA REBCO current lead