The Influence of Cathode Material on the Characteristics of Pulsed Negative Corona in Oxygen

Abstract

Change in time for the shape of the discharge current pulses of the pulsed negative corona in oxygen with cop-per and stainless steel cathodes has been studied for two discharge modes. The change lies in the decrease of the pulse amplitude and duration at half maximum. It is shown that for stainless steel cathodes, the amount of electric charge transferred in one pulse of the discharge current is 15% greater than for copper cathodes. It is also shown that under the maximum load mode, the amount of charge transferred in one pulse of the discharge current is de-creased with time by 10% for both types of cathodes. It is shown that ozone synthesis in the electrode system with copper cathodes is 25% more efficient.

Numerical Simulation of Reproduction of the Development Conditions of the Next Trichel Pulse in Negative Corona

“…In the stationary mode of the negative atmospheric pressure corona, there is no plasma space (as it is evident from the distribution of the field strength in Fig. 1), and behind the cathode layer, further from the cathode, there is a drift space, in which, practically in absence of ionization, the drift of electrons and negative ions to the anode occurs, and which usually contains the rest of the discharge gap (although near those areas of the surface of the real anode, where the field is somewhat enhanced due to the shape of the anode, enhanced ionization, with a sufficiently large gap voltage, can significantly increase the supply of positive ions to the drift space and somewhat change process characteristics [7]). In any case, the drift space makes up most of the interelectrode gap.…”

Study of the efficiency of ozone synthesis in a point‐to‐plain discharge in N2–O2 mixtures

“…The intensive development of low-temperature plasma technologies based on atmospheric discharges has been realized by its applications in wide areas such as water treatment, [1] bio-medicine, [2][3][4] air treatment and purification, [5,6] agriculture, [7,8] and ozone generation. [9,10] As a rule, the applied goal of discharge investigation is to improve the plasma-chemical reactors for more efficient generation of plasma products (irradiation, active agents such as ozone and others).…”

“…The intensive development of low‐temperature plasma technologies based on atmospheric discharges has been realized by its applications in wide areas such as water treatment, [ 1 ] bio‐medicine, [ 2–4 ] air treatment and purification, [ 5,6 ] agriculture, [ 7,8 ] and ozone generation. [ 9,10 ]…”