Journal Press India^®

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Two omnipresent ingredients of the Universe are plasmas and charged dust. The interplay between these two, dusty plasmas have opened up a new and fascinating research area. Dust turns out to be ubiquitous in cosmic plasmas, planetary plasmas, plasmas near the earth and plasmas in the laboratory. In fact, one may speculate that except in the hottest regions of fusion plasmas where dust particles would not survive, most plasmas are dusty plasmas in the sense that some dust particles may be present. Thus dusty plasmas play a vital role in wide range of phenomenon and are of current research interest for a number of reasons. Despite the fundamental study they also have relevance to fusion plasmas. It is an unavoidable problem that the plasma in a Tokomak is contaminated by scrape-off from the walls (thus these plasmas are inherently „dusty‟). Thus control and elimination of the dust produced is an important problem. Thus dusty plasma physics is one of the most rapidly growing and truly interdisciplinary fields of science, as indicated by the number of published papers in research journals and conference proceedings. Dusty plasma physics finds potential application in understanding not only astrophysical phenomenon like dust clusters, star formation, instabilities of interstellar molecular etc but also in the planetary magnetospheres of our solar system. Laboratory dusty plasma is used as a role model to understand these entire phenomena. In this paper, the basic physics of dusty plasmas is discussed. The main focus is on theoretical and experimental observations of dust charging processes, associated forces, crystallization, waves, the dynamics of rotating dust grains and scattering.

Keywords

Dusty Plasma; Waves; Dust Charging; Dusty Forces

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