Microscopic Particle Motions in Strongly Coupled Dusty Plasmas
The microscopic particle motions from the crystal to the disordered state of a dusty plasma with micrometer-sized silicon dioxide particle suspensions in a radio-frequency glow discharge system were studied through an optical microimaging system. Small-amplitude random motion around the lattice sites of the crystal state, relative domain motion with varying boundaries, cooperative hopping in the liquid state, and highly disordered motion with increasing radio-frequency power were observed. Chaotic states with different spatial scales under the coherent and stochastic coupling between dust particles and self-organized background plasma fluctuations were also demonstrated.
I
L
Department of Physics, National Central University, Chungli, Taiwan 32054, Republic of China.
Juan
WT
Chiang
CH
Chu
JH