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Experimental observation of the propagation of periodic ion phase space vortices is reported. Density fluctuation measurements in a double plasma device show an apparently spontaneous acceleration of these periodic structures from ion thermal to ion acoustic velocity. A nonlinear kinetic description explains this as a transition from a new type of nonlinear electrostatic mode (periodic ion holes) to an ion acoustic mode, which is caused by trapped particle scattering.

Additional information

Authors: FRANCK C, Ernst-Moritz-Arndt Universität, Institut für Physik, Greifswald (DE);KLINGER T, Ernst-Moritz-Arndt Universität, Institut für Physik, Greifswald (DE);PIEL A, Christian-Albrecht Universität, Institut für Experimentelle und Angewandte Physik, Kiel (DE);SCHAMEL H, Universität Bayreuth, Physikalisches Institut (DE)
Bibliographic Reference: An article published in: Physics of Plasma, Vol.8, No.9 (2001), pp.4271-4274
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