Plasma wave collapse generated by the interaction of two oppositely propagating electron beams with a plasma
- 1 May 1982
- journal article
- Published by IOP Publishing in Plasma Physics
- Vol. 24 (5) , 567-575
- https://doi.org/10.1088/0032-1028/24/5/010
Abstract
The nonlinear stage of the evolution of unstable Langmuir waves excited by two oppositely-propagating beams is studied experimentally. When a pump at frequency omega p is applied, the two monochromatic Langmuir waves thus generated ( omega p, k) and ( omega p, -k) form a standing wave. The ponderomotive force and the generation of cavitons lead to the process of plasma wave collapse to a spatial width of 7 lambda D and an intensity E2/4 pi nT approximately=0.4. Experimental evidence showing that transit time damping is the limiting mechanism for the collapse process is also discussed.Keywords
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