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Träfflista för sökning "WFRF:(Ratynskaia S.) srt2:(2004)"

Search: WFRF:(Ratynskaia S.) > (2004)

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1.
  • Ratynskaia, Svetlana V., et al. (author)
  • Dust mode in collisionally dominated complex plasmas with particle drift
  • 2004
  • In: IEEE Transactions on Plasma Science. - : Institute of Electrical and Electronics Engineers (IEEE). - 0093-3813 .- 1939-9375. ; 32:2, s. 613-616
  • Journal article (peer-reviewed)abstract
    • Experiments with flow of microparticles were conducted in a de discharge. A sharp threshold in the neutral gas pressure for the onset of an unstable low-frequency dust wave mode was observed. Highly space- and time-resolved measurements of the microparticle flow combined with probe measurements of the plasma parameters have allowed detailed comparison with a theoretical model. The model demonstrates good qualitative and quantitative agreement with the experimental results providing accurate estimates of the particle charge.
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2.
  • Ratynskaia, Svetlana V., et al. (author)
  • Experimental determination of dust-particle charge in a discharge plasma at elevated pressures
  • 2004
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 93:8
  • Journal article (peer-reviewed)abstract
    • The charge of dust particles is determined experimentally in a bulk dc discharge plasma in the pressure range 20-100 Pa. The charge is obtained by two independent methods: one based on an analysis of the particle motion in a stable particle flow and another on an analysis of the transition of the flow to an unstable regime. Molecular-dynamics simulations of the particle charging for conditions similar to those of the experiment are also performed. The results of both experimental methods and the simulations demonstrate good agreement. The charge obtained is several times smaller than predicted by the collisionless orbital motion theory, and thus the results serve as an experimental indication that ion-neutral collisions significantly affect particle charging.
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