Angular Dependence of Critical Current in Coated Conductors at 4.2 K and Magnet Design

Uglietti, D.; Kitaguchi, Hitoshi; Choi, Seyong; Toko, Kiyoshi

doi:10.1109/tasc.2009.2019089

Cited by 40 publications

(24 citation statements)

References 12 publications

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“…1. The maximum critical current of the REBCO conductor does not appear at due to the tilted -axis [2], [3]. In the present study, the effect of the tilted -axis was not considered.…”

Section: Development Of Layer-wound Rebco Coilmentioning

confidence: 84%

REBCO Layer-Wound Coil Tests Under Electromagnetic Forces in an External Magnetic Field of up to 17.2 T

Matsumoto

Choi

Toko

et al. 2012

IEEE Trans. Appl. Supercond.

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A nuclear magnetic resonance (NMR) system using a high-temperature superconducting (HTS) magnet and a probe with an HTS radio frequency coil is currently under development. The HTS NMR magnet is expected to reduce the volume occupied by the magnet and to encourage users to install higher field NMR systems. RE-Ba-Cu-O-coated (REBCO-coated) conductors offer the advantages of a higher critical current density than low-temperature superconductors in magnetic fields above 10 T as well as tolerance to high tensile stress. Both of these factors are expected to lead to a reduction in the volume of the magnet. Four REBCO layer-wound test coils were fabricated in order to investigate their properties under electromagnetic forces in an external magnetic field of up to 17. 2 T. The REBCO coils with a practical inner diameter were successfully operated under electromagnetic forces of over 200 MPa in high magnetic fields.

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“…1. The maximum critical current of the REBCO conductor does not appear at due to the tilted -axis [2], [3]. In the present study, the effect of the tilted -axis was not considered.…”

Section: Development Of Layer-wound Rebco Coilmentioning

confidence: 84%

REBCO Layer-Wound Coil Tests Under Electromagnetic Forces in an External Magnetic Field of up to 17.2 T

Matsumoto

Choi

Toko

et al. 2012

IEEE Trans. Appl. Supercond.

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“…Nevertheless, the critical current decreases with increasing field. It is also highly linked to the orientation of the tape with respect to the field [11]. It is not uncommon that the amount of current carried under transverse field is 1.5-4 times lower than under the same field amplitude but parallel to the tape.…”

Section: Rebco Tapesmentioning

confidence: 99%

REBCO tape performance under high magnetic field

Benkel

Miyoshi

Chaud

et al. 2017

Eur. Phys. J. Appl. Phys.

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Abstract. New improvements in high temperature superconductors (HTS) make them a promising candidate for building the next generation of high field magnets. As the conductors became recently available in long length, new projects such as NOUGAT (new magnet generation to generate Tesla at low cost) were started. This project aims at designing and building an HTS magnet prototype generating 10 T inside a 20 T resistive magnet. In this configuration, severe mechanical stress is applied on the insert and its extremities are subject to a high transverse component of the field. Because the conductor has anisotropic properties, it has to be studied carefully under similar conditions as the final prototype. First, this paper presents both the NOUGAT project and its context. Then, it shows the experimental results on short HTS tapes studied under high magnetic field up to 23 T with varying orientation. These results allow validating the current margin of the prototype. Finally, a first wound prototype is presented with experimental results up to 200 A under 16 T.

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“…Also, because of the high anisotropy of HTS conductors, it is desirable to have an ability to change the sample orientation with respect to the applied magnetic field. Some experimental techniques reduce the current capacity of the sample by forming a micro-bridge, so that the sample may be mounted on a rotating stage attached to low current capacity flexible current leads to investigate the I c angular dependence [15][16][17]. The micro-bridge technique, however, is only applicable to coated conductors that can be patterned by etching and not for multifilamentary Bi-2223 wires, and even so one has to assume that etching does not affect the sample quality and that the sample homogeneity across the width is guaranteed.…”

Section: Experimental Set Upmentioning

confidence: 99%