DC negative corona discharge characteristics in high density nitrogen in point-plane configuration

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:212830

Hernandez-Avila, H L; Nur, M; Bonifaci, N; Denat, A ^[1]

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1. Joseph Fourier Univ., Grenoble (France)

Some investigations of corona discharges in pure nitrogen have been published but they were devoted to a range of low or medium pressure (P{<=}0.1 MPa). This paper deals with the behaviour of corona discharges in negative point-plane configuration in very pure nitrogen under high-pressure (from 0.5 MPa to 10 MPa). The first one, called the low current region appears immediately after the threshold voltage V{sub o} is reached. For higher voltages (V>V{sub o}), a high continuous glow current region is obtained. In addition with these two discharge regions, we can sometimes observe one intermediate region which looks like to a Trichel-like pulse regime. Consequently, in this non electronegative gas, several modes of current discharge can be distinguished on the current-voltage characteristics. In the same conditions in high pressure air - a weakly electronegative gas - only one mode of current discharge controlled by negative ions can be observed. Some assumptions about the physical mechanisms leading to these phenomena in nitrogen are discussed.

• OSTI ID: 212830
• Report Number(s): CONF-950749--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
CORONA DISCHARGES
ELECTRIC CURRENTS
NITROGEN
SPACE CHARGE
VOLTAGE DROP