The normal-zone propagation properties of the non-insulated HTS coil in cryocooled operation

Seok Beom Kim, A. Saitou, J. H. Joo, T. Kadota

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

High temperature superconducting (HTS) coils wound with HTS wires have very low normal zone propagation velocity (NZPV) and complicated quench behaviors because the wires have a high thermal stability and large specific heat. According to these reasons, in case of HTS coils and magnets, it is difficult to expect the self-protection like low temperature superconducting (LTS) coils. In this paper, we suggest a method which can remove the insulation among turn-to-turn in the coil to improve the self-protection property of HTS coils. Because the thermal and electrical contacts along transverse direction are enhanced by no turn-to-turn insulation, the whole thermal stability of HTS coils begins to increase. Furthermore, although a quench occurs in the coil, it is possible to realize a self-protection of HTS coil because the current path of the coil is modified in order to avoid quenching. To confirm a quantitative evaluation for quench behavior of the suggested coil, we carried out the measurements with the coils having variety types of turn-to-turn insulation. The experimental results and the self-protection ability about the tested coils will be presented.

Original languageEnglish
Pages (from-to)1428-1431
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 2011

Fingerprint

coils
propagation
Insulation
Temperature
insulation
Thermodynamic stability
Superconducting wire
Superconducting magnets
Superconducting coils
thermal stability
Specific heat
Quenching
wire
Wire
propagation velocity
electric contacts
magnets
quenching
specific heat
evaluation

Keywords

  • Non-insulating HTS coil
  • Normal-zone propagation
  • Quench
  • Self-protection

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

The normal-zone propagation properties of the non-insulated HTS coil in cryocooled operation. / Kim, Seok Beom; Saitou, A.; Joo, J. H.; Kadota, T.

In: Physica C: Superconductivity and its Applications, Vol. 471, No. 21-22, 11.2011, p. 1428-1431.

Research output: Contribution to journalArticle

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