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Phase-resolved optical emission of dusty rf discharges: Experiment and simulation

André Melzer1,*, Simon Hübner1,†, Lars Lewerentz1,‡, Konstantin Matyash2,§, Ralf Schneider1,∥, and Ramana Ikkurthi3,¶

  • 1Institut für Physik, Ernst-Moritz-Arndt-Universiät, D-17489 Greifswald, Germany
  • 2Max-Planck Institut für Plasmaphysik, EURATOM Association, D-17491 Greifswald, Germany
  • 3Institute for Plasma Research, Bhat, Ghandinagar, Gujarat, India

  • *melzer@physik.uni-greifswald.de
  • †Present address: Department of Applied Physics, Technical University Eindhoven, NL-5600 MB Eindhoven, The Netherlands.
  • ‡lleweren@ipp.mpg.de
  • §knm@ipp.mpg.de
  • ∥schneider@uni-greifswald.de
  • ramana468@gmail.com
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Phys. Rev. E 83, 036411 – Published 29 March, 2011

DOI: https://doi.org/10.1103/PhysRevE.83.036411

Abstract

The spectral emission of atoms in a dusty radio frequence (rf) discharge plasma in argon and helium has been measured with a gated ICCD camera. The spatially and temporally resolved emission/excitation of the argon and helium atoms during the rf cycle in the dusty discharge was compared to the dust-free case. In the bulk plasma above the dust cloud, the emission is clearly enhanced in the dusty discharge with respect to the pure discharge, whereas in the sheath the emission is reduced. In addition, the emission of a dusty argon plasma is studied via particle-particle particle-mesh (PM3) simulations. The rf dynamics with a single dust particle trapped in the sheath was calculated. Like in the experiment the dust modifies the atomic emission. The spatiotemporal excitation pattern of the experiment is reproduced and a detailed understanding of the difference in excitation of the discharge with and without dust is presented.

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Phys. Rev. E 83, 036411– Published 29 March, 2011
  • Received 16 November 2010

©2011 American Physical Society

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