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We found that steady-state paired-particle motion was often observed in a fine-particle cloud in the argon plasma produced by a 100-kHz high-frequency discharge. Monodispersed spherical silica particles with a diameter of $5.0~\mu \text{m}$ were trapped in the plasma. The 2-D motion of these charged particles was carefully recorded using a microscope camera, and their orbits and perturbation frequencies were analyzed. The loci and fast Fourier transform spectra of many paired particles were obtained. By moving the camera horizontally, 3-D images of the particles were recorded, and a 3-D map of the positions of charged particles was obtained. It is considered that the forces inducing the paired-particle motion were generated by the Debye shielding and the electric field surrounding the paired particles. [ABSTRACT FROM AUTHOR]

The initial result of 3-D reconstruction of dusty plasma obtained through the integral photography technique has been reported. Integral photography has been applied to observe fine particles floating in a horizontally parallel-plate radio-frequency plasma. By using a simple system with a lens array and a standard charge-coupled device camera, we can identify the 3-D position of dust particles from a single exposure image obtained from one viewing port. [ABSTRACT FROM PUBLISHER]