Ablation of high-Z material dust grains in edge plasmas of magnetic fusion devices

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4903333· OSTI ID:22407959

Marenkov, E. D. ^[1]; Krasheninnikov, S. I. ^[1]

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1. Moscow Engineering Physics Institute, National Research Nuclear University, Kashirskoe sh., 31, 115563 Moscow (Russian Federation)

The model, including shielding effects of high-Z dust grain ablation in tokamak edge plasma, is presented. In a contrast to shielding models developed for pellets ablation in a hot plasma core, this model deals with the dust grain ablation in relatively cold edge plasma. Using some simplifications, a closed set of equations determining the grain ablation rate Γ is derived and analyzed both analytically and numerically. The scaling law for Γ versus grain radius and ambient plasma parameters is obtained and confirmed by the results of numerical solutions. The results obtained are compared with both dust grain models containing no shielding effects and the pellet ablation models.

• OSTI ID: 22407959
• Journal Information: Physics of Plasmas, Vol. 21, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ANALYTIC FUNCTIONS
DUSTS
EDGE LOCALIZED MODES
HOT PLASMA
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
SCALING LAWS
SHIELDING
TOKAMAK DEVICES