Brownian motion of grains and negative friction in dusty plasmas

Trigger, Zagorodny
2004 Condensed Matter Physics  
Within the approximation of dominant charging collisions the explicit microscopic calculations of the Fokker-Planck kinetic coefficients for highlycharged grains moving in plasma are performed. It is shown that due to ion absorption by grain the friction coefficient can be negative and thus 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 a considerable deviation
more » ... iderable deviation of such solutions from the Maxwellian distribution is established.
doi:10.5488/cmp.7.3.629 fatcat:axynnpx4vbfsni5tf77ocy3zhi