Premium
Negative friction in dusty plasmas
Author(s) -
Trigger S.A.,
Zagorodny A.G.
Publication year - 2003
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200310051
Subject(s) - dusty plasma , plasma , kinetic energy , physics , fokker–planck equation , ion , charge (physics) , absorption (acoustics) , friction coefficient , atomic physics , mechanics , quantum electrodynamics , classical mechanics , materials science , quantum mechanics , differential equation , optics , composite material
Within the approximation of dominant charging collisions the explicit microscopic calculations of the Fokker‐Planck kinetic coefficients for highly‐charged grains moving in plasma are performed. It is shown that due to ion absorption by grain the collecting friction coefficient can be negative and the appropriate threshold value of the grain charge is found. The stationary solutions of the Fokker‐Planck equation with the velocity dependent kinetic coefficient are obtained and the considerable deviation of such solutions from the Maxwellian distribution is established. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)