On the interactions between three fireballs in low-temperature plasma* *To the memory of Noah Hershkowitz, a great plasma physicist and magnanimous human. His passing leaves a gap in the hearts of his colleagues and friends that can hardly be filled. His contributions to experimental plasma physics, in particular to the physics of complex space charge structures, such as double layers,

Abstract

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.