Enhancement of high-temperature superconducting coil stability using doped smart insulation materials for superconducting magnet applications

Mtangi Mohamed Mussa, Hyun Sung Noh, Dawool Kwon, Younghoon Kim, Hyung Wook Kim, Young Sik Jo, Seog Whan Kim, Haigun Lee

Research output: Contribution to journalArticlepeer-review

Abstract

This study reports a high-temperature superconducting (HTS) coil containing molybdenum doped vanadium trioxide (V2O3:Mo) as turn-to-turn insulation material to ameliorate the electrical properties of both insulated and non-insulated (NI) coils. The electrical characteristics and thermal stability of the V2O3:Mo insulated coil against NI and V2O3 insulated coils were investigated through charge-discharge, over-current, and quench tests. The findings revealed that the V2O3:Mo and V2O3 insulated coils demonstrated a faster charge/discharge rate than the NI coil due to the high resistance of the V2O3: Mo or V2O3 insulator which obstructed the current to flow away from the azimuthal current path. In the over-current test at 160A, the V2O3:Mo insulated and NI coils exhibited higher electrical stability than the V2O3 insulated coil because the excessive currents above their critical values bypassed between the turn-to-turn contact. Moreover, the V2O3:Mo insulated coil demonstrated a 2.1times improvement in the minimum quench energy compared to the V2O3 insulated coil at 70 % of the coil's current-carrying capacity, which is an essential performance parameter for the operation of superconducting magnets.

Original languageEnglish
Pages (from-to)540-555
Number of pages16
JournalChinese Journal of Physics
Volume87
DOIs
Publication statusPublished - 2024 Feb

Bibliographical note

Publisher Copyright:
© 2023

Keywords

  • Charging/discharging rates
  • Current bypass
  • Doped smart insulation (DSI)
  • Electrical stability
  • No-insulation (NI)
  • Smart insulation (SI)

ASJC Scopus subject areas

  • General Physics and Astronomy

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