Probing the sheath electric field with a crystal lattice by using thermophoresis in dusty plasma

V. Land, B. Smith, L. Matthews, T. Hyde

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A 2-D dust crystal levitated in the sheath of a modi-fied Gaseous Electronics Conference reference cell is manipulated by heating or cooling the lower electrode. The dust charge is obtained by measuring the global characteristics of the levitated crystal obtained from top-view pictures. From the force balance, the electric field in the sheath is reconstructed. From the Bohm criterion, we conclude that the dust crystal is levitated mainly above and just below the classical Bohm point.

Original languageEnglish
Article number5332365
Pages (from-to)768-773
Number of pages6
JournalIEEE Transactions on Plasma Science
Volume38
Issue number4, part 3
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

Keywords

  • Dust crystal
  • Dusty plasma
  • Modified Gaseous Electronics Conference (GEC) cell
  • Sheath electric field
  • Thermophoresis

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