Effects of ionic liquid electrode on pulse discharge plasmas in the wide range of gas pressures

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3506510· OSTI ID:21537924

Qiang, Chen; Hatakeyama, Rikizo ^[1]; Kaneko, Toshiro ^[1]

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1. Department of Electronic Engineering, Tohoku University, Aoba-yama 05, Sendai 980-8579 (Japan)

Gas-liquid interfacial pulse discharge plasmas are generated in the wide range of gas pressures, where an ionic liquid is used as the liquid electrode. By analyzing the characteristics of discharge voltage and current, the discharge mechanisms at low and high pressures are found to be dominated by secondary electron emission and first Townsend ionization, respectively. Therefore, the discharge properties at low and high pressures are mainly determined by the cathode material and the discharge gas type, respectively. Furthermore, the plasma properties are investigated by a double Langmuir probe. The density of the positive pulse plasma is found to be much smaller than that of the negative pulse plasma, although the discharge voltage and current of the negative and positive pulse plasmas are of the same order of magnitude. The positive pulse discharge plasma is considered to quickly diffuse onto the chamber wall from the radially central region due to its high plasma potential compared with that in the peripheral region.

• OSTI ID: 21537924
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 10; Other Information: DOI: 10.1063/1.3506510; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATHODES
DENSITY
ELECTRON EMISSION
IONIZATION
LANGMUIR PROBE
LIQUIDS
MOLTEN SALTS
PLASMA
PLASMA DENSITY
PLASMA POTENTIAL
PRESSURE RANGE MEGA PA 10-100
PULSES
TOWNSEND DISCHARGE
WALL EFFECTS
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRIC PROBES
ELECTRODES
EMISSION
FLUIDS
PHYSICAL PROPERTIES
PRESSURE RANGE
PRESSURE RANGE MEGA PA
PROBES
SALTS