Influence of Elastic Scattering on Electron Swarm Distribution in Electrified Gases

DOI: 
10.1029/2019JD031564
Publication date: 
02/06/2020
Main author: 
Schmalzried A.
IAA authors: 
Schmalzried, A.;Luque, A.
Authors: 
Schmalzried A., Luque A.
Journal: 
Journal of Geophysical Research: Atmospheres
Publication type: 
Article
Volume: 
125.0
Number: 
e2019JD031564
Abstract: 
The propagation of energetic electrons through air is one key component in the generation of high-energy atmospheric phenomena such as lightning-generated X-ray bursts, terrestrial gamma ray flashes (TGFs), and gamma ray glows. We show here that models for this propagation can be considerably affected by the parameterization of the differential cross section of elastic scattering of electrons on the molecular components of air. We assess existing parameterizations and propose a more accurate one that builds upon the most up-to-date measurements. Then we conclude that by overweighting the forward scattering probability, previous works may have overestimated the production of runaway electrons under high electric fields close to the thermal runaway threshold. ©2020. The Authors.
Database: 
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85085302171&doi=10.1029%2f2019JD031564&partnerID=40&md5=32094f7c640edae6d0d4ac5766d4007c
Keywords: 
differential cross section; electron elastic scattering; electron swarm dynamics; Monte Carlo electron simulation; screened Rutherford; thermal runaway