作者: Hyoungku Kang , Chanjoo Lee , Tae Kuk Ko , Bok-Yeol Seok
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摘要: Dielectric characteristics of gaseous helium (GHe) injected into the cooling system to make sub-cooled nitrogen condition with constant pressure is found be extraordinarily weak in dielectric strength by H. Mitsuii (1998). In high voltage superconducting machines using system, current lead part GHe environment could electrical points rather than magnet liquid (LN2). order enhance part, three methods are suggested this paper. The first one enclosing leads solid material and second exposing vacuum, last topping up materials such as Glass Bubbles (GB) which usually used heat insulator. addition, extinction time bubbles caused breakdown measured determine suitable system. It that bubble LN2 drastically enhanced over 1 bar.