Current Distribution in Coated Conductor Under External Magnetic Field Up to 5 T

Miyazoe, Akihisa; Sekino, Masaki; Toko, Kiyoshi; Ohsaki, Hiroyuki

doi:10.1109/tasc.2010.2093102

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…In this calculation method, the SCF generated by the multiple CCs were estimated using the distribution of the sheet current densities in the single CC. The current distribution under the constant external magnetic field was estimated in the same way as [13]. The calculation of the SCF was carried out as follows:…”

Section: B Calculation Of Scf Using a Sheet Current Distribution In mentioning

confidence: 99%

“…The YBCO CC has the inhomogeneous critical current densities over the width and length [12]. We studied current distributions along the width in a short and straight CC under an external magnetic field up to 5 T [13]. The current distribution gives a magnetic-field distribution taking into account of the inhomogeneous critical current densities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic Field Distribution Generated by Screening Current Flowing in Coated Conductor Arranged Edge-By-Edge and/or Face-To-Back

Miyazoe

Nakanishi

Sekino

et al. 2012

IEEE Trans. Appl. Supercond.

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This paper presents magnetic-field distributions generated by screening currents flowing in short and straight multiple coated conductors exposed to a high magnetic field. The purpose of this study is to understand interactions between the magnetic field and the screening currents flowing in the coated conductors. In this paper, we suggest a method for calculating the magnetic-field distributions from current distributions. The method takes into account of the mutual screening current in the coated conductors. The magnetic-field distributions estimated using the method are in agreement with the experimental results. In addition, the current distributions inducing the magnetic-field distributions are described.

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Section: B Calculation Of Scf Using a Sheet Current Distribution In mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic Field Distribution Generated by Screening Current Flowing in Coated Conductor Arranged Edge-By-Edge and/or Face-To-Back

Miyazoe

Nakanishi

Sekino

et al. 2012

IEEE Trans. Appl. Supercond.

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“…The research on the screening effect in past years mainly focused on the single conductor under the magnetic field perpendicular to the wide surface of the REBCO CC [9,10]. Several analytical equations have been developed to describe the screening current density and local SCIF for the single conductor and the infinite strip-array systems [11,12].…”

Section: Introductionmentioning

confidence: 99%

Screening current induced field characteristics of HTS quasi-isotropic and simply stacked strands in alternating magnetic field

Liu

Wang

Zhang

et al. 2021

Supercond. Sci. Technol.

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The screening current induced field (SCIF) in the flat REBCO coated conductors (REBCO CCs) so called 2G HTS tapes cause undesirable effects in multiple applications. Their existence reduces the spatial uniformity and temporal stability of magnetic fields for applications of superconducting magnets. In this paper, we numerically and experimentally investigate the characterization of the screening current and SCIF of quasi-isotropic strand (Q-IS) and simply stacked strand (SSS) under external alternating magnetic field with various amplitudes, orientations, and excitation rates. The two-dimensional finite element method (2D FEM) based on T-A formulation is adopted for simulation, the Q-IS and SSS samples are fabricated for experiments. The field angle is in the range of 0° to 90° at intervals of 15°, the excitation rate varies from 20 mT/s to 800 mT/s. We display the distribution of screening current in both strands under various field amplitudes and orientations. Then the dependence of SCIF on the amplitude and orientation of external field is studied, respectively. The spatial distribution of SCIF of both strands with different amplitudes and angles of the external field are also discussed. Besides, we analyze the properties of SCIF under various excitation rates. As a result, the SCIF of Q-IS is much smaller and has quasi-isotropic distribution comparing with SSS, which represents that Q-IS has relative smaller screening effect. The spatial point with the largest SCIF of Q-IS locates at the corner of the strand and is independent of the external field, but the corresponding point in SSS varies with the angle and amplitude. The Q-IS is also less susceptible to the change of rate. Therefore, Q-IS has more advantages when the screening effect is considered in superconducting applications.

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“…[1] In our previous studies, we measured distributions of DC transport current in coated conductor with various external magnetic fields [2] and noticed that the DC current distribution was redistributed by external fields [3][4][5][6][7]. Likewise the DC current experiment, investigation about distribution of AC transport current and field dependence of AC current had been necessary.…”

Section: Introductionmentioning

confidence: 99%

Selective detection of AC transport current distributions in GdBCO coated conductors using low temperature scanning Hall probe microscopy

Kim¹,

Kim²,

Park³

et al. 2017

Progress in Superconductivity and Cryogenics

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We studied the distribution of the current density and its magnetic-field dependence in GdBCO coated conductors with AC bias currents using low temperature scanning Hall probe microscopy. We selectively measured magnetic field profiles from AC signal obtained by Lock-in technique and calculated current distributions by inversion calculation. In order to confirm the AC measurement results, we applied DC current corresponding to RMS value of AC current and compared distribution of AC and DC transport current. We carried out the same measurements at various external DC magnetic fields, and investigated field dependence of AC current distribution. We notice that the AC current distribution unaffected by external magnetic fields and preserved their own path on the contrary to DC current.

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Current Distribution in Coated Conductor Under External Magnetic Field Up to 5 T

Cited by 6 publications

References 14 publications

Magnetic Field Distribution Generated by Screening Current Flowing in Coated Conductor Arranged Edge-By-Edge and/or Face-To-Back

Magnetic Field Distribution Generated by Screening Current Flowing in Coated Conductor Arranged Edge-By-Edge and/or Face-To-Back

Screening current induced field characteristics of HTS quasi-isotropic and simply stacked strands in alternating magnetic field

Selective detection of AC transport current distributions in GdBCO coated conductors using low temperature scanning Hall probe microscopy

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