Heartbeat instability as auto-oscillation between dim and bright void regimes

11 Mar 2021  ·  Aleksandr Pikalev, Mikhail Pustylnik, Christoph Räth, Hubertus Thomas ·

We investigated the self-excited as well as optogalvanically stimulated heartbeat instability in RF discharge complex plasma. Three video cameras measured the motion of the microparticles, the plasma emission and the laser-induced fluorescence simultaneously... Based on the experimental results we suggest that the void contraction during the instability is caused by an abrupt void transition from the dim to the bright regime [Pikalev et.al., accepted to PSST (2021), DOI: 10.1088/1361-6595/abe0a2 ]. For the self-excited heartbeat instability, this transition is induced by the growth of the breathing oscillations of the microparticle suspension. read more

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Plasma Physics