Experimental observation and simulation of the equilibration of electron swarms in a scanning drift tube

Z. Donkó, P. Hartmann, I. Korolov, V. Jeges, D. Bošnjaković, S. Dujko

Research output: Contribution to journalArticle

2 Citations (Scopus)


We investigate the spatially and temporally resolved electron kinetics in a homogeneous electric field in argon gas, in the vicinity of an emitting boundary. This (transient) region, where the electron swarm exhibits non-equilibrium character with energy gain and loss processes taking place at separate positions (in space and time), is monitored experimentally in a scanning drift tube apparatus. Depending on the strength of the reduced electric field we observe the equilibration of the swarm over different length scales, beyond which the energy gain and loss mechanism becomes locally balanced and transport properties become spatially invariant. The evolution of the electron swarm in the experimental apparatus is also described by Monte Carlo simulations, of which the results are in good agreement with the experimental observations, over the domains of the reduced electric field and the gas pressure covered.

Original languageEnglish
Article number095007
JournalPlasma Sources Science and Technology
Issue number9
Publication statusPublished - Sep 6 2019



  • drift tube measurement
  • electron swarm
  • Monte Carlo simulation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this