Formation mechanisms of laboratory double layers

Details Formation mechanisms of laboratory double layers Formation mechanisms of laboratory double layers

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2469...35c&link_type=abstract

In NASA. Marshall Space Flight Center Double Layers in Astrophysics p 35-53 (SEE N87-23313 16-88)

Astronomy and Astrophysics

Astrophysics

Boundary Value Problems, Electric Fields, Ion Acoustic Waves, Plasma Layers, Space Plasmas, Trapped Particles, Electron Density (Concentration), Ion Density (Concentration), Phase-Space Integral, Plasma Oscillations

Scientific paper

The evolution processes of double layers were studied in a series of laboratory experiments. It was found that the existence of virtual cathode-type potential wells at the electron injection boundary was the dominant triggering mechanism. The rapid growth of the potential wells led to collisionless ion trapping and the establishment of the necessary trapped ion population. For double layers with small potential drops, collisionless ion trapping actually induced ion-ion streaming instabilities and the formation of ion phase-space vortices. In this regime, the system often exhibited relaxation-type oscillations which correspond to the disruption and the recovery of the double layers.

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