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Distinctive Features of Measuring Te and ne Spatial Distributions in the Globus-M2 Spherical Tokamak Using Method of Thomson Scattering of Laser Radiation

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Abstract

The results of measuring the electron temperature and density spatial distributions in plasma of the Globus-M2 tokamak using the Thomson scattering diagnostics are presented. The diagnostics provides measurements throughout the entire tokamak discharge, starting from time of gas breakdown. The Thomson scattering data were analyzed in order to determine the positions of the last closed flux surface, the plasma magnetic axis, and the radius of inversion during the saw-tooth oscillations. The results of measurements performed during the internal reconnection of magnetic field lines are presents, as well as the dynamics of spatial distributions of electron temperature, density and pressure during the plasma transition to the H-mode. The results of measuring the electron temperature distribution in the scrape-off layer using the Thomson scattering diagnostics are also presented for distances up to 4 cm outside the last closed flux surface.

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ACKNOWLEDGMENTS

The experiments were performed at the unique scientific facility “The Globus-M Spherical Tokamak,” which is a part of the Federal Multiple-Access Center “Materials Science and Diagnostics in Advanced Technologies.”

Funding

The preparation of the TS diagnostics equipment (Section 2) was supported in part by the Ministry of Science and Higher Education of the Russian Federation under the State Contract no. 0034-2019-0001. Measurements of the Te and ne profiles during the transition to the H-mode (S-ection 3) were supported under the State Contract no. 0040-2019-0023; the experiments in the regime with auxiliary heating (Section 4) were supported under the State Contract no. 0034-2021-0001.

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Authors and Affiliations

  1. Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    N. S. Zhiltsov, G. S. Kurskiev, E. E. Tkachenko, S. Yu. Tolstyakov, I. M. Balachenkov, N. N. Bakharev, V. I. Varfolomeev, A. V. Voronin, V. K. Gusev, V. Yu. Goryainov, V. V. D’yachenko, N. V. Ermakov, E. O. Kiselev, A. N. Konovalov, S. V. Krikunov, V. B. Minaev, I. V. Miroshnikov, E. E. Mukhin, A. N. Novokhatsky, M. I. Patrov, Yu. V. Petrov, N. V. Sakharov, O. M. Skrekel’, V. V. Solokha, A. Yu. Telnova, V. A. Tokarev, E. A. Tukhmeneva, S. V. Filippov, N. A. Khromov, P. B. Shchegolev, K. D. Shulyatiev & A. Yu. Yashin

  2. Konstantinov Petersburg Nuclear Physics Institute, National Research Centre “Kurchatov Institute”, 188300, St. Petersburg, Russia

    V. A. Solovey

  3. Efremov Institute of Electrophysical Apparatus, 196641, St. Petersburg, Russia

    A. A. Kavin & A. B. Mineev

  4. Peter the Great St. Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    A. M. Ponomarenko

Authors
  1. N. S. Zhiltsov
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  2. G. S. Kurskiev
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  3. V. A. Solovey
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  4. E. E. Tkachenko
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  5. S. Yu. Tolstyakov
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  6. I. M. Balachenkov
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  7. N. N. Bakharev
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  8. V. I. Varfolomeev
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  9. A. V. Voronin
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  10. V. K. Gusev
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  11. V. Yu. Goryainov
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  12. V. V. D’yachenko
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  13. N. V. Ermakov
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  14. A. A. Kavin
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  15. E. O. Kiselev
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  16. A. N. Konovalov
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  17. S. V. Krikunov
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  18. V. B. Minaev
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  19. A. B. Mineev
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  20. I. V. Miroshnikov
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  21. E. E. Mukhin
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  22. A. N. Novokhatsky
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  23. M. I. Patrov
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  24. Yu. V. Petrov
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  25. A. M. Ponomarenko
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  26. N. V. Sakharov
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  27. O. M. Skrekel’
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  28. V. V. Solokha
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  29. A. Yu. Telnova
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  30. V. A. Tokarev
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  31. E. A. Tukhmeneva
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  32. S. V. Filippov
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  33. N. A. Khromov
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  34. P. B. Shchegolev
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  35. K. D. Shulyatiev
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  36. A. Yu. Yashin
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Corresponding author

Correspondence to N. S. Zhiltsov.

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Translated by I. Grishina

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Zhiltsov, N.S., Kurskiev, G.S., Solovey, V.A. et al. Distinctive Features of Measuring Te and ne Spatial Distributions in the Globus-M2 Spherical Tokamak Using Method of Thomson Scattering of Laser Radiation. Plasma Phys. Rep. 50, 310–321 (2024). https://doi.org/10.1134/S1063780X24600099

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