The influence of the ambipolar field on the levitation conditions of dust particles in the positive column of the glow discharge with a change the spatial orientation of the discharge tube

Anatoly A. Kudryavtsev, Sergey S. Sysoev, Chengxun Yuan, Shubo Li, Zhongxiang Zhou

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Experiments were carried out in dusty plasmas of both the stratified and homogeneous positive columns (PCs) in a U-shaped discharge tube during its rotation from the vertical to the horizontal position. It is shown that in all cases the radial ambipolar field prevents charged dust particles from falling on the tube walls. For a vertically oriented tube, a dust cloud is observed only in a strong field of strata and is absent in a homogeneous plasma. In a horizontally oriented tube, the dust particles drift toward the anode in an axial external field. In this case, dust particles are trapped at the point of transition from the horizontal to the vertical section of the tube, in both the stratified and homogeneous PCs. It was concluded that for a V-shaped design of a cylindrical tube, an ambipolar dust trap, which is simple in technical execution, can be implemented, which makes it possible to hold dust particles in its lower part.

Original languageEnglish
Article number8804382
Pages (from-to)4391-4395
Number of pages5
JournalIEEE Transactions on Plasma Science
Volume47
Issue number9
DOIs
StatePublished - Sep 2019

Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Keywords

  • dust trap
  • Dusty plasma
  • glow discharge
  • positive column (PC)

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