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This work presents a novel, simplified theory of breakdown susceptibility in dielectric-loaded systems operating in DC, with multipactor targeted as the effect of lowest-order. Limits for susceptibility are drawn with the well-known characteristics of secondary-emission [1], and 2-D particle-in-cell modeling is used to monitor the evolution of discharges via time-traces of surface-field characteristics...
This work presents a novel theory of breakdown susceptibility for dielectric-loaded systems in DC, targeting multipactor as the lowest-order effect. Models from [1] are simulated with 2D particle-in-cell (PIC) using the method of [2], and susceptibility limits are developed employing the theory of [3]. Considering secondary electrons near the dielectric surface have a lifetime defined by the perpendicular...
This work reports on 2D Particle-In-Cell (PIC) simulations of gaseous DC breakdown from vacuum through atmospheric pressure in dielectric-loaded, high-voltage systems. The focus of this work is to characterize and order various contributions to breakdown, starting with single-surface multipactor in DC. Simulations use a simple Bergeron geometry similar to that in [1] with a modified PIC model from...
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...
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