Study of two types of T-10 regimes with ECRH and Ohmic heating
V V Alikaev; A A Bagdasarov; E L Berezovsky; G A Bobrovskii; N L Vasin; V A Vershkov; S A Grashin; M M Dremin; U V Esipchuk; S L Efremov; A Ya Kislov; Yu Yu Karzhavin; A A Medvedev; G E Notkin; A B Pimenov; K A Razumova; P V Savrukhin; M M Stepanenko; K B Titishov; V M Trukhin; A V Chankin; I V Miroshnikov; V V Alikaev; Kurchatov Inst. of Atomic Energy, Moscow, USSR; A A Bagdasarov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; E L Berezovsky; Kurchatov Inst. of Atomic Energy, Moscow, USSR; G A Bobrovskii; Kurchatov Inst. of Atomic Energy, Moscow, USSR; N L Vasin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; V A Vershkov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; S A Grashin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; M M Dremin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; U V Esipchuk; Kurchatov Inst. of Atomic Energy, Moscow, USSR; S L Efremov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; A Ya Kislov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; Yu Yu Karzhavin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; A A Medvedev; Kurchatov Inst. of Atomic Energy, Moscow, USSR; G E Notkin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; A B Pimenov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; K A Razumova; Kurchatov Inst. of Atomic Energy, Moscow, USSR; P V Savrukhin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; M M Stepanenko; Kurchatov Inst. of Atomic Energy, Moscow, USSR; K B Titishov; Kurchatov Inst. of Atomic Energy, Moscow, USSR; V M Trukhin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; A V Chankin; Kurchatov Inst. of Atomic Energy, Moscow, USSR; I V Miroshnikov; Kurchatov Inst. of Atomic Energy, Moscow, USSR
Журнал:
Plasma Physics and Controlled Fusion
Дата:
1988-04-01
Аннотация:
The study of two types of T-10 regime-a regime with low impurity confinement (S regime) and a regime with enhanced impurity confinement (B regime) has been continued in deuterium discharges with n<sub>e</sub> approximately n<sub>ecrit</sub>. In the present experiments the transitions from S to B regimes is obtained by the method of gas puff cut-off. Detailed investigations of the profile evolution of T<sub>e</sub>(r), T<sub>i</sub>(r), n<sub>e</sub>(r) and carbon density n<sub>c</sub> showed, that the n<sub>e</sub>(r) profile greatly changes after gas puff cut-off, while T<sub>e</sub>(r) and T<sub>i</sub>(r) remain practically unchanged at the central zone of the plasma. This indicates the possibility of a relation between the limiting n<sub>e</sub>(r) which is established and either T<sub>e</sub>(r) or T<sub>i</sub>(r). It is shown, that the main cause which is responsible for this transition between B and S regime, is a variation of the neutral atom influx to the plasma. The transition itself takes place at a given plasma radius when n<sub>e</sub> reaches some limiting value at this radius.
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