The effect of shear on turbulent diffusion in a microwave discharge plasma in a toroidal stellarator

Autor:	V.M. Zalkind, V.S. Vojtsenya, V.P. Tarasenko, S.I. Solodovchenko, A.Yu. Voloshko, A.F. Stan
Rok vydání:	1977
Předmět:	Physics Nuclear and High Energy Physics Turbulent diffusion Plasma diffusion Plasma Condensed Matter Physics Plasma oscillation Instability law.invention Physics::Fluid Dynamics Amplitude Nuclear magnetic resonance Physics::Plasma Physics law Atomic physics Shear flow Stellarator
Zdroj:	Nuclear Fusion. 17:651-658
ISSN:	1741-4326 0029-5515
DOI:	10.1088/0029-5515/17/4/001
Popis:	A toroidal l = 3 stellarator with large shear (θmax < 0.25) is used to study the oscillations of a steady-state microwave discharge plasma, and the values of the correlation coefficient between density and electric field fluctuations and turbulent plasma fluxes are measured by the correlation method. It is shown that the oscillations observed are due to the drift-dissipative instability. The influence of shear on the amplitude of drift oscillations, on the cross-correlation coefficient and on the turbulent fluxes due to drift instabilities is analysed. A threshold value of shear (θcr ≈ 0.05) is found above which a substantial reduction in the oscillation level (δne21/2/ne ~θ−1.5) and in the magnitude of turbulent plasma fluxes ( ~ θ−3) can be noted.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e6be6dca06b24a3c704df69892026741 https://doi.org/10.1088/0029-5515/17/4/001 Zobrazit plný text záznamu