A multichannel discharge between a stream electrolytic cathode and a metal anode at atmospheric pressure

Abstract

An experimental investigation is performed of the structure and current-voltage characteristics (CVC) of a multichannel discharge (MD) between a stream electrolytic cathode (SEC) and a metal anode, as well as of the density of SEC and anode current in a wide range of values of current I = 0.02-10 A, interelectrode spacing l = 5-50 mm, and anode diameter d a = 5-40 mm. The development of cathode spots on the SEC surface is studied. It is found that a cathode spot of SEC may have various shapes and structures (regular circle, horseshoes, filamentary spots, and so on). The CVC of a multichannel discharge between SEC and metal anode depends significantly on I, l, and d a , as well as on the material of the anode and on the composition and concentration of electrolyte. The dependence of the density of SEC current on discharge current is nonmonotonic. It is for the first time that a bundle-like MD between SEC and metal anode and multichannel and diffuse discharges between the plasma region and stream electrolytic cathode are observed, and their characteristics are investigated.

Characterization of a DC-driven microplasma between a capillary tube and water surface

“…New chemical pathways that are not achievable with traditional plasma processes may be possible by microplasma-produced species at relatively low gas temperatures. Among all kinds of non-equilibrium plasma systems [7][8][9][10], underwater or on water discharges are interesting and promising for their value in plasma physics research [11][12][13][14][15][16][17][18][19][20][21][22][23] and applications in materials processing, biology, and water sterilization [5,[24][25][26]. A range of approaches for generating plasmas in/on liquids have been explored.…”

“…Several authors previously investigated discharge systems with electrolyte electrodes. These studies suggest that different modes, especially glow mode and multichannel mode could be ignited [11][12][13][14][15][16][17][18][19][20]. A mechanism of discharge maintenance based on the estimates of the average energy an impinging H + ion transfers to a negative ion of impurity in the electrolyte, was also proposed [11].…”