Coupled-analysis of current transport performance and thermal behaviour of conduction-cooled Bi-2223/Ag double-pancake coil for magnetic sail spacecraft

Nagasaki, Yoh; Nakamura, Takahiko; Funaki, Ikkoh; Ashida, Yasumasa; Yamakawa, Hiroshi

doi:10.1016/j.physc.2013.06.004

Cited by 9 publications

(16 citation statements)

References 20 publications

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“…The advanced development of the preparation of high temperature superconductors (HTS) films and tapes has opened new opportunities for large-scale applications including power system components such as electrical motors, generators, power transmission cables, transformers, magnets, and superconducting magnetic energy storage devices [1][2][3]. Extensive investigations have been focused on optimizing the fabrication and processing techniques of HTS wires and tapes [4] giving the high values of critical current densities and irreversibility fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistance Study of c-Axis Oriented YBCO Thin Film

et al. 2017

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The c-axis orientation YBa2Cu3O δ thin film was prepared directly on MgO substrate by the pulse laser deposition. The thickness of the film is 170 nm. The superconducting critical temperature is T c50% = 87.5 K and the width of superconducting transition is ∆T = 1.8 K. The temperature dependences of magnetoresistance were measured up to 90 kOe. The widths of the transition to the superconducting state versus applied magnetic field were derived and they were fitted using the formula: ∆T = CH m + ∆T0. The irreversibility fields as a function of temperature were obtained and fitted by the de Almeida and Thouless-like equation: Hirr = Hirr0(1−T /Tc0) n . The irreversibility field at the liquid nitrogen temperature was calculated and it is Hirr = 43.8 kOe when the applied magnetic field is parallel to the c-axis.

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Section: Introductionmentioning

confidence: 99%

Magnetoresistance Study of c-Axis Oriented YBCO Thin Film

et al. 2017

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“…The successful preparation of high-temperature superconductor (HTS) films and tapes has opened new opportunities for large-scale applications including power system components such as electrical motors, generators, power transmission cables, transformers, magnets, and [1][2][3]. Extensive investigations have been focused on optimizing the fabrication and processing techniques of HTS wires and tapes [4] giving the high values of critical current densities and irreversibility fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistance and Irreversibility Fields of Bismuth-Based 1G Tape

Woch¹,

Chrobak²,

Kowalik³

et al. 2016

J Supercond Nov Magn

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The magnetoresistance and irreversibility fields of commercial bismuth-based 1G tape were studied on the basis of the temperature dependencies of the magnetoresistance at the two relative orientations of magnetic field and superconductor plane. The critical temperatures of this tape are the following: T c50 % = 110.3 K and T c0 = 109.9 K, and the width of superconducting transition is T = 0.5 K. The widths of the transition to the superconducting state versus applied magnetic fields were derived for both orientations. The experimental data were fitted using the formula T = CH m + T 0 . The irreversibility field values were obtained and successfully fitted as a function of temperature. At 77 K, they were found to amount to H irr = 72.8 kOe and H irr = 5.5 kOe for the parallel and perpendicular directions, respectively.

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“…The thermal contact resistance is critical in the cryogen-free cooling system by thermal conduction. The thermal analyses for conduction cooled HTS coils have been performed in previous studies [6][7][8]. The thermal analysis considering the thermal contact resistance, especially in contacts among HTS tapes of a HTS coil unlike previous studies, is performed in this paper.…”

Section: Introductionmentioning

confidence: 99%

Thermal and structural analysis of a cryogenic conduction cooling system for a HTS NMR magnet

In¹,

Hong²,

Yeom³

et al. 2016

Progress in Superconductivity and Cryogenics

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The superconducting NMR magnets have used cryogen such as liquid helium for their cooling. The conduction cooling method using cryocoolers, however, makes the cryogenic cooling system for NMR magnets more compact and user-friendly than the cryogen cooling method. This paper describes the thermal and structural analysis of a cryogenic conduction cooling system for a 400 MHz HTS NMR magnet, focusing on the magnet assembly. The highly thermo-conductive cooling plates between HTS double pancake coils are used to transfer the heat generated in coils, namely Joule heating at lap splice joints, to thermal link blocks and finally the cryocooler. The conduction cooling structure of the HTS magnet assembly preliminarily designed is verified by thermal and structural analysis. The orthotropic thermal properties of the HTS coil, thermal contact resistance and radiation heat load are considered in the thermal analysis. The thermal analysis confirms the uniform temperature distribution for the present thermal design of the NMR magnet within 0.2 K. The mechanical stress and the displacement by the electromagnetic force and the thermal contraction are checked to verify structural stability. The structural analysis indicates that the mechanical stress on each component of the magnet is less than its material yield strength and the displacement is acceptable in comparison with the magnet dimension.

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Coupled-analysis of current transport performance and thermal behaviour of conduction-cooled Bi-2223/Ag double-pancake coil for magnetic sail spacecraft

Abstract: tape deteriorated the current transport performance and thermal stability of the HTS coil. The present study contributes to the characterization of HTS coils and design of a coil system for the magnetic sail spacecraft.

Cited by 9 publications

References 20 publications

Magnetoresistance Study of c-Axis Oriented YBCO Thin Film

Magnetoresistance Study of c-Axis Oriented YBCO Thin Film

Magnetoresistance and Irreversibility Fields of Bismuth-Based 1G Tape

Thermal and structural analysis of a cryogenic conduction cooling system for a HTS NMR magnet

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