On the production of energetic electrons at the negative streamer head at moderate overvoltage

Type
Article

Authors
Levko, Dmitry
Raja, Laxminarayan L.

Date
2017-12

Abstract
The generation of energetic electrons by the streamer with a negatively charged head is analyzed using a self-consistent two-dimensional Particle-in-Cell Monte Carlo collision model. The streamer is generated in the vicinity of the cathode at a moderate gap overvoltage and propagates toward the anode due to self-consistent electron/ion multiplication in front of the streamer head. We obtained the generation of energetic electrons with energy exceeding 1 keV at the streamer head when the electric field at the streamer head starts exceeding ∼200 kV/cm. It was found that a small number of energetic electrons can significantly accelerate the streamer propagation and even change the streamer propagation path.

Citation
Levko, D., & Raja, L. L. (2017). On the production of energetic electrons at the negative streamer head at moderate overvoltage. Physics of Plasmas, 24(12), 124503. doi:10.1063/1.5008252

Acknowledgements
This research was supported by Competitive Research Funding from King Abdullah University of Science and Technology (KAUST).

Publisher
AIP Publishing

Journal
Physics of Plasmas

DOI
10.1063/1.5008252

Additional Links
http://aip.scitation.org/doi/10.1063/1.5008252

Permanent link to this record