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

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Tarih

2016

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Iop Publishing Ltd

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

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 closedcircuit resistance of our closed-loop coil was less than 1.8 x 10(-13) Omega 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.

Açıklama

Anahtar Kelimeler

C-doped MgB2 wire, superconducting joints, persistent-mode magnets, MRI application, field-decay measurement

Kaynak

Superconductor Science & Technology

WoS Q Değeri

Q2

Scopus Q Değeri

Cilt

29

Sayı

9

Künye