Simulation of High-Voltage DC Breakdown for Angled Dielectric Insulators Including Space-Charge and Gas-Collision Effects

被引:0
|
作者
Aldan, Manuel Thomas P., III [1 ]
Verboncoeur, John P. [2 ]
机构
[1] Univ Calif Berkeley, Berkeley, CA 94720 USA
[2] Michigan State Univ, Dept Elect & Comp Engn, E Lansing, MI 48824 USA
关键词
Breakdown; dielectrics; multipactor; simulation; gas breakdown; high voltage; EMISSION;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We report on 2D Particle-In-Cell (PIC) simulations of a Bergeron geometry with steady-state fields in a semi-infinite, two-electrode system separated by an angled dielectric with a background gas at various pressures. The often-neglected effects of space charge, dielectric surface charging, spatial and temporal distributions of particles, and the shape of the secondary-emission curve are included. For pressures below a few-hundred mTorr, discharges are dominated by multipactor breakdown initiated by a triple-point source; the breakdown condition is well-characterized by an average secondary-emission coefficient greater than unity at the onset of anodic current, otherwise a dark-current develops due to space-charge saturation. Additional avalanche phenomena occur with increased pressure >= 1 Torr, where space-charge coupling leads to oscillations in an otherwise DC discharge.
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页码:59 / 62
页数:4
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