The behavior of N/sub 2/ + SF/sub 6/ gas mixtures subjected to orthogonal electric and magnetic fields

Abstract

The limiting equivalent electric fields in N 2 + SF 6 binary gas mixtures due to Townsend discharges are evaluated directly from a Monte-Carlo simulation when the mixture is subjected to orthogonal electric and magnetic fields. Along with the limiting equivalent electric fields, transverse and perpendicular drift velocities, electron mean energies and collision frequencies are also determined within the scope of the Monte-Carlo simulation. The equivalent reduced electric field (EREF) concept for the corresponding limiting electric fields is also investigated for the calculated mean energy levels and collision frequencies. The EREF values are found to be in good agreement with the previously published limiting electric field data.

Suppression of Electron Avalanches in Ultra-Dilute SF6-N2 Mixtures Subjected to Time-Invariant Crossed Fields

“…Uniform time-invariant electric and magnetic fields are applied along the -z and -y directions, respectively. The movement of an electron with velocity v between collisions is expressed by the Lorentz force equation as given by [15]…”

“…Table 2. Physical and environmental properties of SF6, N2, and dry air [13][14][15][16]. GWP, global warming potential.…”

“…This fact is crucial in switch design and gas-insulated system applications where the main objective is to have sufficient dielectric strength and interrupt the electric arc as rapidly as possible. The information on the response of ultra-dilute SF6 + N2 mixtures under combined fields is limited in the literature [15]. Therefore, the aim of present study is to investigate swarm In the present study, ultra-dilute SF 6 + N 2 mixtures are subjected to crossed fields with the applied magnetic field being perpendicular to the electric field in order to investigate critical magnetic field values for the suppression of electron avalanche growth resulting in increased dielectric strength.…”

“…This fact is crucial in switch design and gas-insulated system applications where the main objective is to have sufficient dielectric strength and interrupt the electric arc as rapidly as possible. The information on the response of ultra-dilute SF 6 + N 2 mixtures under combined fields is limited in the literature [15]. Therefore, the aim of present study is to investigate swarm development in ultra-dilute SF 6 + N 2 mixtures subjected to combined fields.…”

Kinetic behaviors and dielectric strength of SF<inf>6</inf> and N<inf>2</inf> over the E/N range from 160 to 650Td

“…Referred to a lot of references [2,3,4], it is noted that the particles motions, distributions and densities are regular over the / E N range from 160 to 650Td and the range is calculated for the first time in home as far as the authors aware.…”