Dust-Particle Transport in Tokamak Edge Plasmas

Pigarov, A Y; Krasheninnikov, S I; Soboleva, T K; Rognlien, T D

doi:10.1063/1.2145157

Title: Dust-Particle Transport in Tokamak Edge Plasmas

Journal Article · Mon Sep 12 00:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2145157· OSTI ID:884784

Pigarov, A Y; Krasheninnikov, S I; Soboleva, T K; Rognlien, T D

Dust particulates in the size range of 10nm-100{micro}m are found in all fusion devices. Such dust can be generated during tokamak operation due to strong plasma/material-surface interactions. Some recent experiments and theoretical estimates indicate that dust particles can provide an important source of impurities in the tokamak plasma. Moreover, dust can be a serious threat to the safety of next-step fusion devices. In this paper, recent experimental observations on dust in fusion devices are reviewed. A physical model for dust transport simulation, and a newly developed code DUSTT, are discussed. The DUSTT code incorporates both dust dynamics due to comprehensive dust-plasma interactions as well as the effects of dust heating, charging, and evaporation. The code tracks test dust particles in realistic plasma backgrounds as provided by edge-plasma transport codes. Results are presented for dust transport in current and next-step tokamaks. The effect of dust on divertor plasma profiles and core plasma contamination is examined.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 884784

Report Number(s):: UCRL-JRNL-215483; PHPAEN; TRN: US0603684

Journal Information:: Physics of Plasmas, Vol. 12; ISSN 1070-664X

Country of Publication:: United States

Language:: English

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