MHD activity and formation of the electron internal transport barrier in the T-10 tokamak
K A Razumova; V V Alikaev; A A Borschegovskii; V V Chistyakov; M M Dremin; A V Gorshkov; A Ya Kislov; D A Kislov; S V Krylov; S E Lysenko; T B Myalton; G E Notkin; V I Poznyak; Yu D Pavlov; I N Roy; P V Savrukhin; A V Sushkov; V V Sannikov; S V Soldatov; V A Vershkov; K A Razumova; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; V V Alikaev; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; A A Borschegovskii; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; V V Chistyakov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; M M Dremin; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; A V Gorshkov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; A Ya Kislov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; D A Kislov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; S V Krylov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; S E Lysenko; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; T B Myalton; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; G E Notkin; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; V I Poznyak; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; Yu D Pavlov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; I N Roy; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; P V Savrukhin; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; A V Sushkov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; V V Sannikov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; S V Soldatov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation; V A Vershkov; Russian Research Centre `Kurchatov Institute', Moscow 123182, Russian Federation
Журнал:
Plasma Physics and Controlled Fusion
Дата:
2000-09-01
Аннотация:
The plasma stability and confinement have been investigated through control of the safety factor profile q(r) by the electron cyclotron current drive in the T-10 tokamak. The regimes with dq/dr≅0 and dq/dr<0 in the plasma core were obtained. Various types of MHD activity were observed: ordinary sawtooth, saturated sawtooth, humpbacks, hills etc. It was shown that when the minimal value q<sub>min </sub> increases from q<sub>min </sub><1 to q<sub>min </sub> = 2 the plasma becomes strongly unstable due to the corresponding MHD activity or passes to the steady-state improved confinement mode. The latter is realized when the electron internal transport barrier (EITB) is formed. The condition for the appearance of the EITB is dq/dr≅0, where q = m/n lies near a rational value for low m and n.
272.5Кб