MHD PLASMA ACTIVITY IN THE U-3M TORSATRON DURING THE RF CLEANING MODE WITH THE MAGNETIC FIELD Bϕ(0) = 0.02 T-Reference-Cited by-同舟云学术

MHD PLASMA ACTIVITY IN THE U-3M TORSATRON DURING THE RF CLEANING MODE WITH THE MAGNETIC FIELD Bϕ(0) = 0.02 T

Published:2019-02-20 Issue: Volume: Page:20-22
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Container-title:Problems of Atomic Science and Technology
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Author:

Pashnev V.K.,Sorokovoy E.L.,Petrushenya A.A.,Ozherel’ev F.I.

Abstract

In the considered mode of cleaning, plasma was created and heated by antennas at frequencies fRF1 ≈ 7.9 and fRF2 ≈ 8.8 MHz, the magnitude of the constant magnetic field was Bϕ(0) ≈ 0.02 T, so that the ion cyclotron frequency was much lower than the heating frequency. The average plasma density was n ~ 1×1018 m-3, electron temperature was ~10 eV, working gas pressure was 10-4 Torr. Using a set of 15 magnetic sensors installed in one of the poloidal sections of the torus, fluctuations of the poloidal magnetic field were recorded. It was found that in the investigated frequency range 0...100 kHz, the spectrum of fluctuations of the poloidal magnetic field has two characteristic frequencies 6 and 49 kHz. The dynamics of the intensity of the magnetic plasma fluctuations for the investigated frequencies was also studied.

Publisher

Problems of Atomic Science and Technology

Reference15 articles.

1. V.S. Voitsenya, A.I. Lyssoivan, V.E. Moiseenko, et al. The present state of investigations on stellarators in Kharkov // Plasma and Fusion Research. 2011, v. 6, p. 2402024.

2. G.G. Lesnyakov, E.D. Volkov, A.V. Georgievskij, et al. Study of the magnetic configuration of an l=3 torsatron by the triode and the luminescent rod methods // Nucl. Fusion. 1992, v. 32(12), p. 2157.

3. V.Y. Bykov, V.V. Chechkin, I.P. Fomin, et al. Divertor studies in the l = 3 Uragan-3m torsatron // Plasma Physics and Controlled Fusion. 1995, v. 37(3), p. 271.

4. V.V. Chechkin, L.I. Grigor’eva, M.S. Smirnova, et al. Plasma flow asymmetries in the natural helical divertor of an l = 3 torsatron and their relation to particle losses // Nucl. Fusion. 2002, v. 42(2), p. 192.

5. V.V. Chechkin, L.I. Grigor’eva, E.L. Sorokovoy, et al. Plasma heating effects on divertor flow vertical asymmetries in the Uragan-3M torsatron // Nucl. Fusion. 2003, v. 43(10), p. 1175.