Excitation of multiple ion‐acoustic shocks

Multiple electrostatic ion‐acoustic shock‐like density perturbations are observed experimentally to be launched from a large plate in a quiescent collisionless plasma. The formation of the fastest shock is due to ions expelled from the edge of the ’’transient sheath’’ surrounding the plate. The seco...

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Bibliographic Details
Published in:The Physics of fluids (1958) 1981-08, Vol.24 (8), p.1452-1455
Main Authors: Chan, Chung, Khazei, Mehyar, Lonngren, Karl E., Hershkowitz, Noah
Format: Article
Language:English
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Summary:Multiple electrostatic ion‐acoustic shock‐like density perturbations are observed experimentally to be launched from a large plate in a quiescent collisionless plasma. The formation of the fastest shock is due to ions expelled from the edge of the ’’transient sheath’’ surrounding the plate. The second shock then evolves as a result of the surrounding ions filling in the region of density depression created by the first shock. Reflected ions and turbulent ion‐acoustic noise at the shock front and amplitude modulation in the trailing dispersing oscillations are only observed for the leading shock.
ISSN:0031-9171
2163-4998
DOI:10.1063/1.863566