Jianfen Liu - IEEE Xplore Author Profile

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This paper reviews various methods used to simulate avalanche growth due to electron multiplication in gases in uniform electric fields. The Monte Carlo simulation method and the Boltzmann equation methods are considered and data in sulfur hexafluoride are summarized in view of its use in engineering applications.<>Show More
Non-equilibrium behavior of electrons and ions in gases in an electric field occurs in many situations such as in the cathode fall region of a glow discharge, asymmetrical electrodes between which the Laplacian electric field is nonuniform, in coronas and spark breakdown. This paper reviews various methods used to describe the non-equilibrium behavior of electrons and the degree of success obtaine...Show More
This paper is a continuation of series of investigations carried out into the various aspects of corona discharges using Monte Carlo simulation techniques. Positive corona discharges are described in SF/sub 6/ under three voltage levels in a 0.5 cm gap between a hyperboloidal needle and a plane electrode at a gas number density of N=2.12/spl times/10/sup 18/ cm/sup -3/. The current which is in the...Show More
Positive coronas in SF/sub 6/ under three voltage levels, 3.0, 3.5 and 4.0 kV, are studied for a 0.5 cm gap between a hyperboloid needle and a plane electrode at a gas number density N=2.12/spl times/10/sup 18/ cm/sup 3/. The current in the form of a burst of pulses is found to increase with increasing voltage. The initiation and development of successive avalanches are traced as function of time ...Show More
Negative coronas in SF/sub 6/ under three voltage levels are investigated by Monte Carlo simulation. For the purpose of simulation, the gap between a hyperboloidal needle and a plane is divided into two regions: region I where the electric field is very steep and most electrons and ions are accumulated, and region II the rest of the gap. In region I electron motion is simulated by dividing the reg...Show More