“…Streamers in dielectric liquids such as transformer oil [5,6], normal hexane [7], cyclohexane [8,9], ester [10], and liquid nitrogen [11] have long been investigated to advance our understanding of breakdown phenomena [12,13]. In positive polarity, streamer propagations in these dielectric liquids have been classified into two types, namely, slow streamers and fast streamers, based on their structures and propagation velocities.…”