Insulation characteristics of cryogens for HTS power apparatus

J. H. Choi; W. J. Kim; Y. H. Choi; H. G. Lee; H. J. Kim; S. H. Kim

doi:10.1109/TASC.2012.2183570

Insulation characteristics of cryogens for HTS power apparatus

J. H. Choi, W. J. Kim, Y. H. Choi, H. G. Lee, H. J. Kim, S. H. Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

A cryogenic cooling system is essential for high temperature superconducting (HTS) apparatus because cryogenic temperature is generated by using a cryocooler or cryogen. The cryogen method is widely applied to various HTS apparatus because its thermal stability is higher than that of the cryocooler. Furthermore, the cryogen not only performs cooling but also insulates electrically. Thus, the insulation performance of an HTS apparatus relies heavily on the insulation characteristics of cryogen.This study examines the insulation characteristics of cryogens to be applied to HTS apparatus, using nitrogen and argon in liquid and solid state as cryogen. Their electrical characteristics such as the flashover discharge and breakdown are also investigated and compared. We also discuss whether nitrogen and argon in solid state are applicable to HTS apparatus as cryogens.

Original language	English
Article number	6156748
Journal	IEEE Transactions on Applied Superconductivity
Volume	22
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2012.2183570
Publication status	Published - 2012

Keywords

Argon
cryogen
electric breakdown
high temperature superconductor
insulation
nitrogen

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Choi, J. H., Kim, W. J., Choi, Y. H., Lee, H. G., Kim, H. J., & Kim, S. H. (2012). Insulation characteristics of cryogens for HTS power apparatus. IEEE Transactions on Applied Superconductivity, 22(3), [6156748]. https://doi.org/10.1109/TASC.2012.2183570

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abstract = "A cryogenic cooling system is essential for high temperature superconducting (HTS) apparatus because cryogenic temperature is generated by using a cryocooler or cryogen. The cryogen method is widely applied to various HTS apparatus because its thermal stability is higher than that of the cryocooler. Furthermore, the cryogen not only performs cooling but also insulates electrically. Thus, the insulation performance of an HTS apparatus relies heavily on the insulation characteristics of cryogen.This study examines the insulation characteristics of cryogens to be applied to HTS apparatus, using nitrogen and argon in liquid and solid state as cryogen. Their electrical characteristics such as the flashover discharge and breakdown are also investigated and compared. We also discuss whether nitrogen and argon in solid state are applicable to HTS apparatus as cryogens.",

keywords = "Argon, cryogen, electric breakdown, high temperature superconductor, insulation, nitrogen",

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AU - Kim, S. H.

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