Title :
DC breakdown voltage characteristics in the presence of metallic particles in saturated liquid helium
Author :
Hara, M. ; Maeda, Y. ; Nakagawa, Y. ; Suehiro, J. ; Yamada, S.
Author_Institution :
ISEE, Kyushu Univ., Fukuoka, Japan
Abstract :
This paper deals with breakdown voltage characteristics of saturated liquid helium, in the presence of a metallic particle in shape of needle or sphere to obtain insulation design data for the pool-cooled low temperature superconducting coil and to find the factors dominating the breakdown voltage. The results show that the lowest breakdown voltage appears at a free needle particle which produces bubble-generation, rich initial electrons and high stress electric field.
Keywords :
bubbles; cooling; dielectric liquids; electric breakdown; insulation; liquid helium; metals; DC breakdown voltage; He; bubble-generation; insulation design data; metallic particles; needle particle; pool-cooled low temperature superconducting coil; saturated liquid helium; Breakdown voltage; Dielectric liquids; Electrons; Helium; Insulation; Needles; Shape; Stress; Superconducting coils; Temperature;
Conference_Titel :
Dielectric Liquids, 2005. ICDL 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8954-9
DOI :
10.1109/ICDL.2005.1490103
