Divertor flow and particle loss behaviors in spontaneous change of confinement state in the URAGAN-3M torsatron

• Date: 2005
• Main Authors: Chechkin, V.V., Sorokovoy, E.L., Grigor’eva, L.I., Slavnyj, A.S., Sorokovoy, Ye.L., Volkov, E.D., Nazarov, N.I., Burchenko, P.Ya., Tsybenko, S.A., Lozin, A.V., Kulaga, A.Ye., Litvinov, A.P., Mironov, Yu.K., Romanov, V.S., Masuzaki, S., Yamazaki, K.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2005
• Series: Вопросы атомной науки и техники
• Subjects: Magnetic confinement
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/79308
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Divertor flow and particle loss behaviors in spontaneous change of confinement state in the URAGAN-3M torsatron / V.V. Chechkin, E.L. Sorokovoy, L.I. Grigor’eva, A.S. Slavnyj, Ye.L. Sorokovoy, E.D. Volkov, N.I. Nazarov, P.Ya. Burchenko, S.A. Tsybenko, A.V. Lozin, A.Ye. Kulaga, A.P. Litvinov, Yu.K. Mironov, V.S. Romanov, S. Masuzaki, K. Yamazaki // Вопросы атомной науки и техники. — 2005. — № 2. — С. 3-7. — Бібліогр.: 7 назв. — англ.

Under conditions of spontaneous change of plasma confinement state having been observed recently in the U-3M torsatron with a natural helical divertor, it is shown that at the initial phase of this change all the components of the diverted plasma flow (DPF) decrease, while thermal (TI) and suprathermal (STI) ion content in the bulk plasma increases and the TI+STI fraction in the DPF is reduced on the ion В×∇В drift side, thus indicating an improvement of ion confinement. The initial phase is ended by a DPF rise on the ion В×∇В drift side, a TI+STI content decay in the bulk plasma and a rise of TI+STI outflow into the DPF, these being indications of an ion confinement deterioration. However, a simultaneous DPF reduction on the electron В×∇В drift side and a rise of electron density and ECE indicate an improvement of electron confinement.