Phys. Rev. Lett. 75, 838–841 (1995)Charging of Dust Grains in Plasma with Energetic ElectronsReceived 13 March 1995; published in the issue dated 31 July 1995 The charge on small grains of glass, copper, graphite, and silicon has been measured in a plasma device containing both thermal electrons with energies of a few eV and monoenergetic suprathermal electrons. For conditions in which the charging current is dominated by suprathermal electrons, the grains charge to the potential that repels these electrons unless they induce significant secondary emission. The charge on the grains is linear with size for diameters from 30 to 120 μm and is the value expected from the grain capacitance and the charging potential. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.838
DOI:
10.1103/PhysRevLett.75.838
PACS:
52.25.Vy
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