Quench-induced dynamic breakdown and prebreakdown characteristics of liquid helium

Author

Okubo, H. ; Wakita, M. ; Goshima, H. ; Hayakawa, N. ; Hikita, M.

Author_Institution

Nagoya Univ., Japan

fYear

1996

fDate

15-19 Jul 1996

Firstpage

329

Lastpage

332

Abstract

We investigated the quench-induced dynamic breakdown and prebreakdown characteristics of liquid helium (LHe) for practical insulation design of superconducting power apparatus. Experimental results revealed that the quench drastically reduced the breakdown voltage of LHe in the thermal bubble disturbance. Moreover, dynamic breakdown characteristics in a quasi-uniform field using a superconducting coil were investigated and the results revealed that the breakdown was induced in the quench-initiated region where the largest thermal energy was injected

Keywords

dielectric liquids; electric breakdown; insulating materials; insulation testing; liquid helium; quenching (thermal); superconducting coils; He; breakdown voltage; insulation design; liquid He; prebreakdown characteristics; quasi-uniform field; quench-induced dynamic breakdown; quench-initiated region; superconducting coil; superconducting power apparatus; thermal bubble disturbance; thermal energy injection; Breakdown voltage; Cryogenics; Dielectric liquids; Electric breakdown; Electrodes; Helium; Nonuniform electric fields; Superconducting coils; Superconducting filaments and wires; Thermal quenching;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on

Conference_Location

Roma

Print_ISBN

0-7803-3560-0

Type

conf

DOI

10.1109/ICDL.1996.565500

Filename

565500