Visible-Light Imaging of the Super-Alfvénic/Sonic Collisional Merging Process of Field-Reversed Configurations with a Contrast Medium-Mixed Plasmoid

Daichi Kobayashi, Taichi Seki, Tomohiko Asai, Keisuke Hirama, Reiji Hayata, Kota Araoka, Tsutomu Takahashi, Jordan Morelli