Determination of the ion-drag force in a complex plasma

• The ion-drag force acting on dust particles in the positive column of a dc discharge is measured in the pressure range of 20-120 Pa. The force is obtained by a method which does not require a priori knowledge of the particle charge, but uses the charge gradient determined from the same experiment. The method depends only on two experimentally determined quantities: the particle drift velocity and the electric field. The comparison of experimental results with theoretical models is presented and discussed.

Keyword

falling dust particles

void formation

glow-discharge

transport

particulate

pressure

object

motion

gases

flow

Publication and Content Type

ref (subject category)

art (subject category)