Title

A new approach to a superconducting joining process for carbon-doped MgB2 conductor

RIS ID

108839

Publication Details

Patel, D., Al Hossain, M., Maeda, M., Shahabuddin, M., Yanmaz, E., Pradhan, S., Tomsic, M., Choi, S. & Kim, J. (2016). A new approach to a superconducting joining process for carbon-doped MgB2 conductor. Superconductor Science and Technology, 29 (9), 1-7.

Abstract

We report a new approach to a superconducting joining process for unreacted in situ carbon (C)-doped magnesium diboride (MgB2) wires. To operate a magnetic resonance imaging (MRI) magnet in the persistent mode, the superconducting joints between two conductors are as critical as the other key components. In addition, a stable and reliable joining process enables the superconducting magnet to operate without an external power supply. However, joint results using unreacted in situ C-doped MgB2 wires, which are used for high-field operation, have been limited, and only very poor performance has been obtained. By controlling the pressure inside a joint part, in this study, we successfully obtained current carrying retention in the joint of up to 72% compared to wire without a joint. The closed-circuit resistance of our closed-loop coil was less than 1.8 x 10−13 Ω at 16.7 ± 4.7 K, as measured by the field-decay measurement method. These results indicate that MgB2 has a promising future in MRI application.

Grant Number

ARC/FT110100170, ARC/DE130101247

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Link to publisher version (DOI)

http://dx.doi.org/10.1088/0953-2048/29/9/095001