Dynamics of a Potential Barrier Formed on the Tail of a Moving Double Layer in a Collisionless Plasma

Experimental Evidence of a Double Layer in a Large Volume Helicon Reactor

“…Historically, experimental regimes have fallen into two main categories, namely, double or triple plasma devices, which are voltage driven [15,16], and current driven discharges with an abrupt change in diameter [17], where the common thread was the requirement of an artificially induced current to drive the DL. However, by carefully adjusting the potentials on immersed grids, it has been shown that it is the flow of ions and electrons rather than the applied potentials in triple plasma devices which create the DL [18].…”

Magnetospheric Plasma Studies Using Data from the Dynamics High and Low Altitude Plasma Instruments.

“…Recent laboratory experiments on double layers also indicate a similar structure (Iizuka et al, 1982). The condition for producing such a potential structure is not clear, although computer simulations by Wagner (1980) suggest strong wave trapping due to the Buneman instability.…”

Positively Biased Probes in Magnetized Plasmas

“…In potential relaxation oscillations the axial propagation of a double layer was observed which does not occur in the present case. The current-limiting potential structure builds up near the electrode but does not propagate axially making the relaxation time independent of the machine length [26,27]. In the low-beta Q-machine plasmas electromagnetic phenomena are negligible but in the present EMHD regime the transient current pulses excite whistler wave packets which propagate along B 0 but do not determine the pulse repetition time.…”