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Characteristic properties of the frame-antenna-produced RF discharge evolution in the Uragan-3M torsatron

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Abstract

In the ℓ = 3 Uragan-3M torsatron, hydrogen plasma is produced and heated by RF fields in the Alfvén range of frequencies (ω ≲ ω ci ). To this end, a frame antenna with a broad spectrum of generated parallel wavenumbers is used. The RF discharge evolution is studied experimentally at different values of the RF power fed to the antenna (the anode voltage of the oscillator and the antenna current) and the initial pressure of the fueling gas. It is shown that, depending on the antenna current and hydrogen pressure, the discharge can operate in two regimes differing in the plasma density, temperature, and particle loss. The change in the discharge regime with increasing anode voltage is steplike in character. The particular values of the anode voltage and pressure at which the change occurs are affected by RF preionization or breakdown stabilization by a microwave discharge. The obtained results will be used in future experiments to choose the optimal regimes of the frame-antenna-produced RF discharge as a target for the production and heating of a denser plasma by another, shorter wavelength three-half-turn antenna.

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Authors and Affiliations

  1. Institute of Plasma Physics, National Science Center Kharkov Institute of Physics and Technology, vul. Akademichna 1, Kharkiv, 61108, Ukraine

    V. V. Chechkin, L. I. Grigor’eva, R. O. Pavlichenko, A. Ye. Kulaga, N. V. Zamanov, V. E. Moiseenko, P. Ya. Burchenko, A. V. Lozin, S. A. Tsybenko, I. K. Tarasov, I. M. Pankratov, D. L. Grekov, A. A. Beletskii, A. A. Kasilov, V. S. Voitsenya, V. K. Pashnev, V. G. Konovalov, A. N. Shapoval, Yu. K. Mironov & V. S. Romanov

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  1. V. V. Chechkin
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  2. L. I. Grigor’eva
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  3. R. O. Pavlichenko
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  4. A. Ye. Kulaga
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  5. N. V. Zamanov
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  6. V. E. Moiseenko
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  7. P. Ya. Burchenko
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  8. A. V. Lozin
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  9. S. A. Tsybenko
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  10. I. K. Tarasov
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  11. I. M. Pankratov
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  12. D. L. Grekov
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  13. A. A. Beletskii
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  14. A. A. Kasilov
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  15. V. S. Voitsenya
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  16. V. K. Pashnev
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  17. V. G. Konovalov
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  18. A. N. Shapoval
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  19. Yu. K. Mironov
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  20. V. S. Romanov
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Corresponding author

Correspondence to V. V. Chechkin.

Additional information

Published in Russian in Fizika Plazmy, 2014, Vol. 40, No. 8, pp. 697–706.

The article was translated by the authors.

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Chechkin, V.V., Grigor’eva, L.I., Pavlichenko, R.O. et al. Characteristic properties of the frame-antenna-produced RF discharge evolution in the Uragan-3M torsatron. Plasma Phys. Rep. 40, 601–610 (2014). https://doi.org/10.1134/S1063780X14080030

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  • DOI: https://doi.org/10.1134/S1063780X14080030

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