Characteristics of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron

• Published in: Plasma physics reports Vol. 41; no. 12; pp. 1002 - 1015
• Main Authors: Grigor’eva, L. I., Chechkin, V. V., Moiseenko, V. E., Grekov, D. L., Pavlichenko, R. O., Lozin, A. V., Tarasov, I. K., Kulaga, A. Ye, Zamanov, N. V., Tretiak, K. K., Kozulya, M. M., Beletskii, A. A., Kasilov, A. A., Mironov, Yu. K., Romanov, V. S., Voitsenya, V. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2015
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; ANTENNAS; Atomic; ELECTRIC CURRENTS; ELECTRON DENSITY; ELECTRON TEMPERATURE; HEAT; HYDROGEN; LOSSES; Molecular; Optical and Plasma Physics; Physics; Physics and Astronomy; PLASMA; PLASMA DENSITY; Stellarators; URAGAN STELLARATOR; Plasma Physic Report; Anode Voltage; Divertor Flow; Helical Coil; Fast Wave
• ISSN: 1063-780X; 1562-6938
• DOI: 10.1134/S1063780X1512003X

In the ℓ = 3 Uragan-3M torsatron hydrogen plasma is produced by RF fields in the Alfvén range of frequencies (ω ≤ ω ci ). The initial (target) plasma with the line-averaged density of units 10 12 cm −3 is produced by a frame antenna with a broad spectrum of generated parallel wavenumbers. After this, to heat the plasma and bring its density to ~10 13 cm –3 , another, shorter wavelength three-half-turn antenna with large transverse currents is used. The behavior of the density, electron temperature, and loss of the plasma supported by the three-half-turn antenna is studied depending on the RF power fed to the antenna and initial values of the density and electron temperature supplied by the frame antenna.