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

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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.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia

    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

  2. Pirogov Russian National Research Medical University, Moscow, 117997, Russia

    V. D. Borzosekov, E. M. Konchekov, D. V. Malakhov, A. E. Petrov & V. D. Stepakhin

  3. Moscow Technological University, Moscow, 119454, Russia

    D. V. Malakhov

Authors
  1. G. M. Batanov
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  2. V. D. Borzosekov
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  3. L. V. Kolik
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  4. E. M. Konchekov
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  5. D. V. Malakhov
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  6. A. E. Petrov
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  7. K. A. Sarksyan
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  8. V. D. Stepakhin
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  9. N. K. Kharchev
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Correspondence to G. M. Batanov.

Additional information

Original Russian Text © 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, 2017, published in Fizika Plazmy, 2017, Vol. 43, No. 11, pp. 889–902.

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Batanov, G.M., Borzosekov, V.D., Kolik, L.V. et al. Toroidal inhomogeneity of plasma density fluctuations during ECR plasma heating in the L-2M stellarator. Plasma Phys. Rep. 43, 1052–1064 (2017). https://doi.org/10.1134/S1063780X17110034

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  • DOI: https://doi.org/10.1134/S1063780X17110034

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