Laser interferometric technology is an important means for diagnosing plasmas due to its high temporal and spatial resolution. In this work, air switch discharge plasma was diagnosed by a Mach-Zehnder laser interferometer with wavelength of 532 nm. The generated between two needle-type Cu electrodes. Three dimensional electron density profiles the were deduced numerical processing interferogram...

Electrical Discharge Machine (EDM) is one of the non-traditional machining processes. EDM process is based on thermoelectric energy between the work and an electrode. A pulse discharge occurs in a small gap between the work piece and the electrode and removes the unwanted material from the parent metal through melting and vaporization. The electrode and the work piece must have an electrical co...

The chapter, after a general introduction concerning plasmas produced in air at atmospheric pressure, describes the chemical kinetics happening in the plasma gas-phase, focusing on the nitrogen oxides mechanism of formation and elimination. After a general review of the chemical kinetic pattern, we discuss dielectric barrier discharges and their use for NOx remediation. In fact, research concer...

35 kv. as compared to 55 kv. for the arc discharge on an ordinary day. The experiment clearly showed that corona current flow in an atmosphere of high humidity is greatly reduced, and that spark discharges at relatively low voltages are apt to occur. The explanation of this phenomenon very likely is to be found in the reduction of the mobility of negative ions in air of high humidity, although ...