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Physics of Plasmas / Volume 19 / Issue 2 / ARTICLES / Magnetically Confined Plasmas, Heating, Confinement

Phys. Plasmas 19, 022501 (2012); http://dx.doi.org/10.1063/1.3680610 (9 pages)

Effects of dust particles on the dynamics of blobs in the scrape off layer II

D. Jovanović1 and U. de Angelis2

1Institute of Physics, University of Belgrade, P. O. Box 57, 11001 Belgrade, Serbia
2Dipartimento di Scienze Fisiche, Università Federico II and INFN Sezione di Napoli, Complesso Universitario di M.S. Angelo, via Cintia, I-80126 Napoli, Italy

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(Received 27 September 2011; accepted 21 November 2011; published online 16 February 2012)

A detailed analysis is performed of the results of numerical simulations of the dynamics of plasma blobs, obtained within the model of the nonlinear interchange mode, including the effects of the dissipation by dust, in tokamak scrape-off layer plasmas. The maximum distances that a plasma blob may travel in the radial direction are calculated under physical conditions characteristic for several large tokamaks that are presently in operation, and it is found that a relatively small amount of 30 nm carbon dust particulates, corresponding to only a few grams of dust in the entire scrape-off layer, may dissipate the blobs and prevent them from reaching the tokamak wall.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. BASIC EQUATIONS
  3. THE DIMENSIONLESS VELOCITY AND LIFETIME OF PLASMA BLOBS
    1. Inertial regime
    2. Ion-dust collisional regime
    3. Sheath connected regime
  4. THE PARAMETERS OF VARIOUS MACHINES
    1. The ablation of dust grains
    2. The width of the scrape-off layer
  5. THE MAXIMUM DISTANCE TRAVELLED BY A PLASMA BLOB
  6. CONCLUSIONS

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KEYWORDS, PACS, and IPC

Keywords

carbon, dusty plasmas, nanostructured materials, numerical analysis, plasma boundary layers, plasma nonlinear processes, plasma simulation, plasma toroidal confinement, plasma transport processes, Tokamak devices

PACS

  • 52.27.Lw

    Dusty or complex plasmas; plasma crystals

  • 52.35.Mw

    Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)

  • 52.40.Hf

    Plasma-material interactions; boundary layer effects

  • 52.55.Fa

    Tokamaks, spherical tokamaks

  • 52.65.-y

    Plasma simulation

  • 52.25.Fi

    Transport properties

International Patent Classification (IPC)

  • B82B1/00

    Nano-structures

  • H05H1/02

    Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3680610

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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