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(EXP3/04) Beta Limit Due to Resistive Instabilities in T-10

D. A. Kislov¹⁾, Yu. V. Esipchuk¹⁾, N. Kirneva¹⁾, I. V. Klimanov¹⁾, Yu. D. Pavlov¹⁾, A. A. Subbotin¹⁾, V. V. Alikaev¹⁾, A. A. Borshegovskij¹⁾, Yu. V. Gott¹⁾, A. M. Kakurin¹⁾, S. V. Krilov¹⁾, T. Myalton¹⁾, I. N. Roy¹⁾, E. Trukhina¹⁾, V. V. Volkov¹⁾ and the T-10 Team
 
¹⁾ RRC ``Kurchatov Institute'', Moscow, Russia

Abstract.  Soft beta limiting phenomena have been observed in T-10 in ECRH heated plasmas. Neoclassical tearing modes are supposed to be responsible for the beta limitation. The MHD onset was observed at high $\beta_{\mathrm{p}}^{}$ but low $\beta_{\mathrm{N}}^{}$ values. Critical $\beta$ has been found to be almost independent of collisionality parameter $\nu_{\mathrm{e}}^{*}$. Sawtooth stabilization by ECCD does not result in an increase of critical $\beta$ . Dependence of the critical $\beta$ on the q(r) profile (modified by ECCD) has been observed.

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