Experimental study on the effect of applying a crossed electric field on the breakdown behavior of low vacuum

Experimental Study of Corona Properties with a Heated Discharge Electrode and Crossed Magnetic Fields Individually

“…It can be said that the influence of a crossed magnetic field may be regarded as equivalent to an increase in gas pressure, which is in accordance with the previous results given [2]. The Paschen minimum voltage observed with a crossed magnetic field is higher than that corresponding to the Paschen minimum voltage without a magnetic field, which is in line with the results given in [2,10]. The effect of transverse magnetic field is larger for negative corona rather than for positive corona, which may be due to the fact, that electrons have small mass compared to ions and hence smaller the mass, greater is h. Thus in ordinary magnetic field, the angle h is significant for electrons and nearly negligible for ions.…”

“…At this point, the influence of corona wire temperature is opposite to the effect of gap pressure [8], for which the higher pressure results in lower corona current and higher value of corona inception voltage. The effect of the temperature rise of the discharge electrode on the breakdown streamer in both positive and negative corona can be eliminated by the methods shown in [8][9][10]. The results of [9] showed that the corona onset voltage and the breakdown voltage increase as the gas velocity increases.…”

“…For a higher pressure the corona discharge may not start by then, because at the higher pressures, the effect of the ion convection becomes more significant and contributes more to the corona current [8]. Abu-Elabbas et al [10] showed that transverse magnetic field acts as if it was barrier to the moving charged particles. This in turn will lead to the retardation of the complete bridging of the gap and hence cause an increase in the corona onset voltage and a decrease in the corona current.…”