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The effect of charged dust on the Farley-Buneman instability is investigated. Linear kinetic theory is used to estimate the critical electron drift in the presence of either negatively or positively charged dust. The charge-to-mass ratio of the dust is much smaller than that of the ions, and the dust influences the instability through its effect on equilibrium charge neutrality. It is shown that...
Dust measurements on the Vega and Giotto probes to Comet Halley have shown that dust particles of very small sizes (10–100 A) might be very abundant in cometary comas. A scenario of self-generation of such population of very small grains (VSGs) via collisional interaction with the cometary dust coma is considered here. If the VSGs can be charged to an electrostatic potential of ≳10 V, they would be...
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