不平等電界真空ギャップの破壊電界における電極面積効果

抄録

This paper has discussed area effect on breakdown field strength in vacuum gaps under non-uniform field. To identify whether the common area effect can be found between uniform and non-uniform field gaps or not, 50 % breakdown field strength (E50) vs. electrode area more than 90 % of maximum fields strength on cathode (S90) was compared among four kinds of plate-plate gaps, three kinds of ring-plate gaps, and two kinds of sphere-plate gaps. As a result, E50 vs. S90 for plate-plate gaps shows different characteristics from the other kinds of gap arrangements when radial curvature of edge is large and gap length is short. We discussed the reason and how to conduct the insulation design for actual high voltage conductors, consist of some curved surfaces and plane surfaces.