On the interactions between three fireballs in low-temperature plasma*

Extensive experimental investigations have been carried out on the interaction between three plasma fireballs in low-temperature plasma. The particle dynamics within the plasma space charge formations and the exchange between them have been investigated. Cold Langmuir probe measurements were taken showing the influence of the fireballs on the background plasma parameters. The current oscillations show specific frequencies for the dynamic states of the fireballs, where periodic expulsion and backflow of ions occur near the surrounding double layer. Interaction maxima or resonance phenomena are revealed at specific distances between the electrodes.