Dust in the Ion Wind: A Model for Plasma Dust Particle Dynamics

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Description

A model is developed for the forces acting on a micrometer-size particle (dust) suspended within a plasma sheath. The significant forces acting on a single particle are gravity, neutral gas drag, electric field, and the ion wind due to ion flow to the electrode. It is shown that an instability in the small-amplitude dust oscillation might exist if the conditions are appropriate. In such a case the forcing term due to the ion wind exceeds the damping of the gas drag. The basic physical cause for the instability is that the ion wind force can be a decreasing function of ... continued below

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26 pages

Creation Information

RILEY, MERLE E. February 1, 2001.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

A model is developed for the forces acting on a micrometer-size particle (dust) suspended within a plasma sheath. The significant forces acting on a single particle are gravity, neutral gas drag, electric field, and the ion wind due to ion flow to the electrode. It is shown that an instability in the small-amplitude dust oscillation might exist if the conditions are appropriate. In such a case the forcing term due to the ion wind exceeds the damping of the gas drag. The basic physical cause for the instability is that the ion wind force can be a decreasing function of the relative ion-particle velocity. However it seems very unlikely the appropriate conditions for instability are present in typical dusty plasmas.

Physical Description

26 pages

Source

  • Other Information: PBD: 1 Feb 2001

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  • Report No.: SAND2001-0406
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/780294 | External Link
  • Office of Scientific & Technical Information Report Number: 780294
  • Archival Resource Key: ark:/67531/metadc718189

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • February 1, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

Description Last Updated

  • April 12, 2016, 3:41 p.m.

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RILEY, MERLE E. Dust in the Ion Wind: A Model for Plasma Dust Particle Dynamics, report, February 1, 2001; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc718189/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.