کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1569183 | 1514257 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Migration of artificially introduced micron-size carbon dust in the DIII-D divertor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Migration of pre-characterized carbon dust in a tokamak environment was studied by introduction of â¼30 mg of micron-size (â¼6 μm median diameter) dust in the lower divertor of DIII-D using a DiMES sample holder. Direct exposure of the dust to high particle and heat fluxes in ELMing H-mode lower single-null discharges resulted in part of the dust being injected into the plasma. Following a brief exposure (â¼0.1 s) at the outer strike point, 1.5-2% of the total dust carbon content (2 -3 Ã 1019 carbon atoms, equivalent to a few million dust particles) penetrated the core plasma, raising the core carbon density by a factor of 2-3. Individual dust particles were observed moving at velocities of 10-100 m/s, predominantly in the toroidal direction for deuteron flow to the outer divertor target, consistent with the ion drag force. The observed behavior of the dust is in qualitative agreement with modeling by the 3D DustT code.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volumes 363â365, 15 June 2007, Pages 227-232
Journal: Journal of Nuclear Materials - Volumes 363â365, 15 June 2007, Pages 227-232
نویسندگان
D.L. Rudakov, W.P. West, C.P.C. Wong, N.H. Brooks, T.E. Evans, M.E. Fenstermacher, M. Groth, S.I. Krasheninnikov, C.J. Lasnier, A.G. McLean, A.Yu. Pigarov, W.M. Solomon, G.Y. Antar, J.A. Boedo, R.P. Doerner, E.M. Hollmann, A.W. Hyatt, R.A. Moyer,