Dynamics of nano-dust in tokamak edge plasma
2011
Abstract The dynamics of nano-scale dust for tokamak edge conditions is reviewed. It is shown that unlike micron-scale grains, where the ion–grain friction is the dominant force acting on the grain, nano-dust dynamics is the subject of both friction and Lorentz forces. Possible impact of nano-dust on MARFE is investigated and it is found that dust, providing plasma particle sink and thus causing plasma flow, can play a dominant role in the localization of impurity in low temperature region. It is also shown that dust can significantly reduce the growth rate of flute instability.
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