Non-equilibrium of charged particles in swarms and plasmas—from binary collisions to plasma effects

Zoran Petrović, Ilija Simonović, Srdjan MARJANOVIĆ, Danko Bošnjaković, Dragana Marić, Gordana Malović, Saša Dujko

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this article we show three quite different examples of low-temperature plasmas, where one can follow the connection of the elementary binary processes (occurring at the nanoscopic scale) to the macroscopic discharge behavior and to its application. The frst example is on the nature of the higher-order transport coefficient (second-order diffusion or skewness); how it may be used to improve the modelling of plasmas and also on how it may be used to
discern details of the relevant cross sections. A prerequisite for such modeling and use of transport data is that the hydrodynamic approximation is applicable. In the second example, we show the actual development of avalanches in a resistive plate chamber particle detector by conducting kinetic modelling (although it may also be achieved by using swarm data). The current and deposited charge waveforms may be predicted accurately showing temporal
resolution, which allows us to optimize detectors by adjusting the gas mixture composition and external fields. Here kinetic modeling is necessary to establish high accuracy and the details of the physics that supports fluid models that allows us to follow the transition to streamers. Finally, we show an example of positron traps filled with gas that, for all practical purposes, are a weakly ionized gas akin to swarms, and may be modeled in that fashion. However, low pressures dictate the need to apply full kinetic modelling and use the energy
distribution function to explain the kinetics of the system. In this way, it is possible to confirm a well established phenomenology, but in a manner that allows precise quantitative comparisons and description, and thus open doors to a possible optimization.
Original languageEnglish
Article number014026
Number of pages9
JournalPlasma Physics Controlled Fusion
Volume59
DOIs
Publication statusPublished - 2 Nov 2016

Keywords

  • Boltzmann equation
  • Monte Carlo simulations
  • positron traps
  • resistive plate chambers
  • skewness
  • non-equilibrium plasma
  • charged particle swarms

Fingerprint Dive into the research topics of 'Non-equilibrium of charged particles in swarms and plasmas—from binary collisions to plasma effects'. Together they form a unique fingerprint.

Cite this