Volume 117, Number 2, January 2017
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||06 March 2017|
Density waves at the interface of a binary complex plasma
1 College of Science, Donghua University - 201620 Shanghai, PRC
2 Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR) 82234 Weßling, Germany
3 Joint Institute for High Temperatures - 125412 Moscow, Russia
Received: 18 January 2017
Accepted: 17 February 2017
Density waves were studied in a phase-separated binary complex plasma under microgravity conditions. For the big particles, waves were self-excited by the two-stream instability, while for small particles, they were excited by heartbeat instability with the presence of reversed propagating pulses of a different frequency. By studying the dynamics of wave crests at the interface, we recognize a “collision zone” and a “merger zone” before and after the interface, respectively. The results provide a generic picture of wave-wave interaction at the interface between two “mediums”.
PACS: 52.27.Lw – Dusty or complex plasmas; plasma crystals / 52.35.Fp – Electrostatic waves and oscillations (e.g., ion-acoustic waves) / 52.35.Mw – Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)
© EPLA, 2017
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