Toroidal inhomogeneity of plasma density fluctuations during ECR plasma heating in the L-2M stellarator View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2017-11-15

AUTHORS

G. M. Batanov, V. D. Borzosekov, L. V. Kolik, E. M. Konchekov, D. V. Malakhov, A. E. Petrov, K. A. Sarksyan, V. D. Stepakhin, N. K. Kharchev

ABSTRACT

Correlation between short-wavelength (k⊥ ≈ 20–30 cm–1) and long-wavelength (k⊥ ≈ 1–2 cm–1) plasma density fluctuations in two poloidal cross sections of the stellarator chamber separated by 1/14 or 5/14 of the torus perimeter was studied using collective scattering of radiation of two 75-GHz gyrotrons and radiation of a 37-GHz Doppler reflectometer at an ECR heating power density of 1.6–3.2 MW/m3. It is found that excitation of turbulent fluctuations is bursty in character and that fluctuations excited in different L-2M cross sections are uncorrelated. It is shown that the energy of turbulent fluctuations is modulated by a low frequency of 5–20 kHz. An idea is put forward that anomalous transport is toroidally inhomogeneous. More... »

PAGES

1052-1064

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063780x17110034

DOI

http://dx.doi.org/10.1134/s1063780x17110034

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1092688958


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