Rotation of a single vortex in dusty plasma
Yan Jia, Feng Fan, Liu Fu-Cheng, He Ya-Feng
       

(color online) Color plots of the particle trajectory at (a) 30 Pa, (b) 40 Pa, (c) 50 Pa, and (d) 60 Pa, respectively. rf power:15 W. Each trajectory of grain lasts 0.24 s, which are represented by six dots of different colors. Color bar indicates the time span.