Thomson scattering on non-thermal atmospheric pressure plasma jets

Simon Hübner, Joao Santos Sousa, Joost Van Der Mullen, William G. Graham

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

To characterize non-thermal atmospheric pressure plasmas experimentally, a large variety of methods and techniques is available, each having its own specific possibilities and limitations. A rewarding method to investigate these plasma sources is laser Thomson scattering. However, that is challenging. Non-thermal atmospheric pressure plasmas (gas temperatures close to room temperature and electron temperatures of a few eV) have usually small dimensions (below 1 mm) and a low degree of ionization (below 10-4). Here an overview is presented of how Thomson scattering can be applied to such plasmas and used to measure directly spatially and temporally resolved the electron density and energy distribution. A general description of the scattering of photons and the guidelines for an experimental setup of this active diagnostic are provided. Special attention is given to the design concepts required to achieve the maximum signal photon flux with a minimum of unwanted signals. Recent results from the literature are also presented and discussed.

Original languageEnglish
Article number054005
Number of pages15
JournalPlasma Sources Science and Technology
Volume24
Issue number5
DOIs
Publication statusPublished - 27 Aug 2015

Keywords

  • atmospheric pressure plasma
  • laser diagnostic
  • low temperature plasma
  • Thomson scattering

ASJC Scopus subject areas

  • Condensed Matter Physics

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