Spatial-frequency-resolved schlieren sensor for turbulence visualization in arc discharge. - Inada, Yuki; Kikuchi, Ryo; Hirano, Yuichi; Maede, Yusuke; Tanaka, Yasunori; Nakano, Yusuke; Shigeta, Masaya; Fujino, Takayasu; Kumada, Akiko (Plasma Chemistry & Plasma Processing, 2024)