期刊
PHYSICAL REVIEW LETTERS
卷 88, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.88.095006
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Highly charged dust grains in plasma discharges reside at the sheath edge, where the ions stream toward the electrode at speed similar toc(s). Above a critical pressure P-crit, the grains lose their kinetic energy and reach a strongly coupled crystalline state, but for P < P-crit the grains acquire a large random kinetic energy and act like a fluid. We show that the dust heating in the fluid phase is due to an ion-dust two-stream instability, which is stabilized at P > P-crit by the combined effect of ion-molecule and grain-molecule collisions.
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