[Table of Contents]

Plasma and Fusion Research

Volume 5, S2028 (2010)

Regular Articles

Experimental Studies of Helical Nonneutral Plasmas with a Helical Magnetic Axis
Daichi SUGIMOTO, Haruhiko HIMURA, Hiroyuki OKADA1), Satoshi YAMAMOTO1), Shinji KOBAYASHI1), Tohru MIZUUCHI1), Sadao MASAMUNE and Fumimichi SANO1)
Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-0855, Japan
1)
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
(Received 8 December 2009 / Accepted 7 April 2010 / Published 10 December 2010)

Abstract

Toroidal nonneutral plasmas confined on helical magnetic surfaces with a helical axis are experimentally studied for the first time. Variations in space potential φs and electron density ne on closed helical magnetic surfaces are clearly observed similar to those of helical plasmas with plane axes in past experiments. The measured data in this experiment are compared with numerical results obtained from Poisson's equation applied to poloidal cross sections of Heliotron J.

Keywords

toroidal nonneutral plasma, pure electron plasma, magnetic surface confinement, variation of plasma parameters on magnetic surface

DOI: 10.1585/pfr.5.S2028

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This paper may be cited as follows:

Daichi SUGIMOTO, Haruhiko HIMURA, Hiroyuki OKADA, Satoshi YAMAMOTO, Shinji KOBAYASHI, Tohru MIZUUCHI, Sadao MASAMUNE and Fumimichi SANO, Plasma Fusion Res. 5, S2028 (2010).