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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Density Fluctuations as an Intrinsic Mechanism to Keep Self-Consistent Shape of Pressure Profile

Oct 17, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 8

Speaker

Dr Vladimir Vershkov (ITF NCR "Kurchatov Institute")

Description

The paper presents new insight into previous and new experimental data of the turbulent density fluctuations behavior in T-10 OH and ECRH discharges. The experiments showed existence of the same maximal peaked pressure profile in both OH and ECRH tokamak plasmas as well as strong deterioration of particle confinement after plasma reach this profile (fast density decay in OH, “density pump out” in ECRH). Maximal peaking could be achieved either by flat density and peaked temperature or vice versa. Minimal turbulence level does not depend on heating power and observed when pressure profile is slightly wider than the extreme one. The density fluctuations did not significantly contribute to the heat transport but determined particle fluxes to maintain the pressure profile.
Country or International Organisation Russian Federation
Paper Number EX/11-2Rb

Primary author

Dr Vladimir Vershkov (ITF NCR "Kurchatov Institute")

Co-authors

Mr Alexander Danilov (ITF NRC "Kurchatov Institute") Mr Dmitry Ryjakov (ITF NRC "Kurchatov Institute") Mr Dmitry Sergeev (ITF NRC "Kurchatov Institute") Dr Dmitry Shelukhin (ITF NRC "Kurchatov Institute") Mr Eugene Gorbunov (ITF NRC "Kurchatov Institute") Mr Georgy Subbotin (ITF NRC "Kurchatov Institute") Mr Gleb Okulov (ITF NRC "Kurchatov Institute") Mr Sergey Krylov (ITF NRC "Kurchatov Institute") Mrs Tatiana Myalton (ITF NRC "Kurchatov Institute") Mr Vasyliy Chistiakov (ITF NRC "Kurchatov Insitute") Mr Vladimir Trukhin (ITF NRC "Kurchatov Institute") Prof. Yuri Dnestrovskij (ITF NRC "Kurchatov Institute") Mr Yuri Skosyrev (ITF NRC "Kurchatov Insitute")

Presentation materials