Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets

B. H. Yoo, J. C. Kim, Y. G. Kim, D. Y. Hwang, J. H. Lee, Haigun Lee

Research output: Contribution to journalArticle

Abstract

This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was <1.5 × 10-14 Ω. Therefore, the proposed joint technique can be employed for developing multifilament MgB2 MRI magnets operating in the persistent-current mode.

Original languageEnglish
Article number094701
JournalReview of Scientific Instruments
Volume89
Issue number9
DOIs
Publication statusPublished - 2018 Sep 1

Fingerprint

Magnetic resonance
Magnets
magnetic resonance
magnets
wire
Wire
Imaging techniques
Critical currents
pressing
Magnesium
magnesium
critical current
filaments
degradation
Degradation
decay

ASJC Scopus subject areas

  • Instrumentation

Cite this

Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets. / Yoo, B. H.; Kim, J. C.; Kim, Y. G.; Hwang, D. Y.; Lee, J. H.; Lee, Haigun.

In: Review of Scientific Instruments, Vol. 89, No. 9, 094701, 01.09.2018.

Research output: Contribution to journalArticle

Yoo, B. H. ; Kim, J. C. ; Kim, Y. G. ; Hwang, D. Y. ; Lee, J. H. ; Lee, Haigun. / Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets. In: Review of Scientific Instruments. 2018 ; Vol. 89, No. 9.
@article{9a2b52ad45334aba9de0e63b78abc376,
title = "Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets",
abstract = "This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was <1.5 × 10-14 Ω. Therefore, the proposed joint technique can be employed for developing multifilament MgB2 MRI magnets operating in the persistent-current mode.",
author = "Yoo, {B. H.} and Kim, {J. C.} and Kim, {Y. G.} and Hwang, {D. Y.} and Lee, {J. H.} and Haigun Lee",
year = "2018",
month = "9",
day = "1",
doi = "10.1063/1.5040549",
language = "English",
volume = "89",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics Publising LLC",
number = "9",

}

TY - JOUR

T1 - Investigation of multifilament MgB2 superconducting joint technique for development of MRI magnets

AU - Yoo, B. H.

AU - Kim, J. C.

AU - Kim, Y. G.

AU - Hwang, D. Y.

AU - Lee, J. H.

AU - Lee, Haigun

PY - 2018/9/1

Y1 - 2018/9/1

N2 - This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was <1.5 × 10-14 Ω. Therefore, the proposed joint technique can be employed for developing multifilament MgB2 MRI magnets operating in the persistent-current mode.

AB - This study presents the investigation of superconducting joints fabricated using multifilament magnesium diboride (MgB2) wires for the development of persistent-current mode magnetic resonance imaging (MRI) magnets. The critical current of the jointed samples decreased with increasing cutting angle because the smaller cutting angle allowed greater exposure of the MgB2 filament, thereby increasing the contact area for the wire-bulk-wire connection. In addition, an appropriate pressing pressure (300 MPa) was necessary to establish the multifilament MgB2 joint without significant degradation of superconducting properties. The resistance of the optimal MgB2 joint, measured using the field-decay technique, was <1.5 × 10-14 Ω. Therefore, the proposed joint technique can be employed for developing multifilament MgB2 MRI magnets operating in the persistent-current mode.

UR - http://www.scopus.com/inward/record.url?scp=85053115220&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053115220&partnerID=8YFLogxK

U2 - 10.1063/1.5040549

DO - 10.1063/1.5040549

M3 - Article

VL - 89

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 9

M1 - 094701

ER -