Predictive evolution of dusty plasma instabilities
Résumé
When a high density of dust particles is growing inside a plasma, it is well-known that low frequency instabilities can appear. These unstable phenomena are induced by the strong decrease of the electron density due to dust particle charging. The plasma equilibrium is disturbed and the instability characteristics are evolving as dust particle size and density are changing. In this contribution we show that these instabilities follow a well-defined succession of phases and that their evolution (frequency, duration) can be predicted from starting characteristics. For example, the instability duration can be predicted from the measurement of either the instability apparition time or starting frequency. We will also present some very singular behaviors evidenced during these instabilities thanks to high-speed imaging.