Publication:
Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak

Дата
2020
Авторы
Wang, H. Q.
Watkins, J. G.
Guo, H. Y.
Leonard, A. W.
Stepanenko, A. A.
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Научные группы
Организационные подразделения
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Организационная единица
Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Аннотация
© 2020 Author(s).An MHD mode with a frequency of <10 kHz has been identified near the inner strike point from various diagnostics, i.e., divertor Langmuir probes, magnetics sensors, and interferometers, but does not appear in the upstream and core diagnostics. This MHD mode is associated with magnetic oscillations of ≳5 G, has a long wavelength in the toroidal direction with toroidal mode number n = 1, but is localized in a narrow radial region of a few cm. The mode appears when the outer strike point remains attached and the inner strike point nearly detaches, grows with increasing density, and eventually weakens and vanishes as the outer strike point detaches. This mode results in particle flux with an order of magnitude higher than the background plasmas near the inner strike point. The mode characteristics are consistent with the Current-Convective-Instability theory prediction. Initial simulations based on experimental input have found oscillations with similar frequencies but weaker amplitude.
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Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak / Wang, H.Q. [et al.] // Physics of Plasmas. - 2020. - 27. - № 2. - 10.1063/1.5140354
URI
https://www.doi.org/10.1063/1.5140354
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85079228610&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000518014400003
 https://openrepository.mephi.ru/handle/123456789/20301
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