Effect of pressure on the electrode fall for impulse arcs in argon betweencopper electrodes
2011 (English)Conference paper (Refereed)
The complete electric arc discharge in gases for short gaps in homogeneous electric field and lowpressure·distance (pd) values (< 150 Torr·cm), can be described as a transition between differentdischarge mechanisms like Townsend, glow, streamer and finally arc. Once the arc state isachieved, the measured voltage drops to some volts and the current density increases several ordersof magnitude at the arc spot. The arc voltage can be interpreted as the sum of the voltage dropalong the conductive gas column and two transition regions between the electrodes and the gas, theanode and cathode fall. The physical processes in these transition regions affect the measuredelectrode fall (sum of anode and cathode falls). In this work, the effect of the gas pressure on theelectrode fall is analyzed for a pressure range of 20 to 85 Torr. The results showed an increment ofthe measured voltage when the pressure is increased until 1 Torr.
Place, publisher, year, edition, pages
Belfast, Northen Ireland, 2011.
cold arc discharge, electrode fall
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Atmospheric Discharges
IdentifiersURN: urn:nbn:se:uu:diva-298438OAI: oai:DiVA.org:uu-298438DiVA: diva2:946139
30th International Conference on Plasma and Ionized Gases, ICPIG 2011