Title :
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
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;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on
Conference_Location :
Roma
Print_ISBN :
0-7803-3560-0
DOI :
10.1109/ICDL.1996.565500
