Arc Modeling for a low current Impulse Discharge in an Enclosed Microspark Gap
2012 (English)Conference paper (Refereed)
Enclosed microspark gaps are commonly used as voltage controlled closing switches in gas discharge tubes -GDT-. These devices can be used as low voltage spark gap switches or surge protective devices. In this work, the arc discharge in a GDT under a current impulse was modelled. Mass, momentum and energy conservation equations are solved in a computer fluid dynamics model that includes turbulence, radiation and joule heating. The thermodynamic properties of the gas fluid were taken from the literature. Net emission coefficients are used for the calculation of radiation losses. Since the electrical stimulus is a low energy current impulse, the magnetic pinch forces acting on the plasma are disregarded. The GDT is filled with argon at 0.1 MPa pressure, enclosed in an aluminium oxide ceramic cylindrical container. This container is brazed together with two copper electrodes for an equivalent gap distance of 600 µm.
Place, publisher, year, edition, pages
Beijing, China, 2012.
gas discharge tube, microspark gap, arc modeling, low energy arc
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Atmospheric Discharges
IdentifiersURN: urn:nbn:se:uu:diva-298437OAI: oai:DiVA.org:uu-298437DiVA: diva2:946137
19th International Conference on Gas Discharges and their applications, GD 2012