Recent measurements of the electric potential profile and fluctuations in ECRH and NBI plasmas on TJ-II stellarator
Heavy Ion Beam Probe diagnostics is used in TJ-II stellarator to study directly the plasma electric potential with a good spatial (up to 1cm) and temporal (up to 2 µs ) resolution. Low density (ne = (0.3…0.5)×1019 m –3) ECRH plasma in TJ-II is characterized by positive plasma potential (ϕ(0) = +6...
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| Datum: | 2009 |
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| Hauptverfasser: | , , , , , , , , , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2009
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| Schriftenreihe: | Вопросы атомной науки и техники |
| Schlagworte: | |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/88171 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Recent measurements of the electric potential profile and fluctuations in ECRH and NBI plasmas on TJ-II stellarator / L.I. Krupnik, A.V. Melnikov, C. Hidalgo, L.G. Eliseev, A.A. Chmyga, A.D. Komarov, A.S. Kozachok, S.V. Perfilov, L.G. Lysenko, A.I. Zhezhera, M.A. Pedrosa, J.L. de Pablos // Вопросы атомной науки и техники. — 2009. — № 1. — С. 31-33. — Бібліогр.: 2 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Heavy Ion Beam Probe diagnostics is used in TJ-II stellarator to study directly the plasma electric potential with a
good spatial (up to 1cm) and temporal (up to 2 µs ) resolution. Low density (ne = (0.3…0.5)×1019 m
–3) ECRH plasma in
TJ-II is characterized by positive plasma potential (ϕ(0) = +600…+ 400 V). At higher densities the minor area of the
negative electric potential appears at the edge. This area increases with the density, finally makes potential fully
negative. This tendency is affected by ECRH power and deposition area. The NBI plasmas are characterized by
negative electric potential in the full plasma column from the center to the edge, (ϕ(0) = -300…-600 V). These results
show the clear link between plasma potential, temperature, density and particle confinement. |
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