Quench initiation and normal zone propagation characteristics of smart insulated high-temperature superconducting coil

Mtangi Mohamed Mussa, Hyun Sung Noh, Minkyu Sun, Jongsung Lee, Hyung Wook Kim, Young Sik Jo, Seog Whan Kim, Nuru Ramadhan Mlyuka, Haigun Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A smart insulation (SI) winding technique utilizing vanadium trioxide (V2O3) as a turn-to-turn insulation material is an effective means of achieving a suitable time constant and thermal stability in high-temperature superconducting (HTS) coils. However, the low electrical conductivity of the V2O3 makes the SI coil vulnerable to damage during quenching. To address this problem, this study explored a mixture of V2O3 and molybdenum (Mo) particles to improve the thermal stability of the SI coil. Two GdBCO coils, insulated with V2O3 and V2O3:Mo, respectively, were fabricated, and quench tests were performed at various operating currents in liquid nitrogen at 77 K. The findings revealed that the V2O3:Mo-insulated coil demonstrated improvements of 82%, 25%, and 160% in the minimum quench energy, and the normal-zone propagation velocities in the longitudinal and transverse directions, respectively, at 60% of the current-carrying capacity of the coil, which are essential performance parameters in the operation of a superconducting magnet.

Original languageEnglish
Pages (from-to)24-35
Number of pages12
JournalCurrent Applied Physics
Volume56
DOIs
Publication statusPublished - 2023 Dec

Bibliographical note

Publisher Copyright:
© 2023 Korean Physical Society

Keywords

  • Characteristic resistance
  • Metal-insulator-transition
  • Minimum quench energy
  • Normal zone propagation velocity
  • Smart insulation
  • Thermal stability

ASJC Scopus subject areas

  • General Materials Science
  • General Physics and Astronomy

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