Dusty plasma cavities: probe-induced and natural

Observation of external control and formation of a void in cogenerated dusty plasma

“…As the difference in potential between the probe and the surrounding plasma is reduced, the strength of the electric field decreases and therefore the void size is decreased. But a positively biased probe (relative to surrounding plasma) can also induce a dust void or cavity, as reported by Harris et al [17]. They showed that increasing the probe potential above the floating potential increases the void size.…”