Experimental Studies of Helical Nonneutral Plasmas with a Helical Magnetic Axis

Daichi SUGIMOTO; Haruhiko HIMURA; Hiroyuki OKADA; Satoshi YAMAMOTO; Shinji KOBAYASHI; Tohru MIZUUCHI; Sadao MASAMUNE; Fumimichi SANO

doi:10.1585/pfr.5.S2028

Regular Articles

Experimental Studies of Helical Nonneutral Plasmas with a Helical Magnetic Axis

Daichi SUGIMOTO, Haruhiko HIMURA, Hiroyuki OKADA, Satoshi YAMAMOTO, Shinji KOBAYASHI, Tohru MIZUUCHI, Sadao MASAMUNE, Fumimichi SANO

Author information

Daichi SUGIMOTO
Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-0855, Japan
Haruhiko HIMURA
Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-0855, Japan
Hiroyuki OKADA
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Satoshi YAMAMOTO
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Shinji KOBAYASHI
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Tohru MIZUUCHI
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Sadao MASAMUNE
Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-0855, Japan
Fumimichi SANO
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan

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

JOURNAL FREE ACCESS

2010 Volume 5 Pages S2028

DOI https://doi.org/10.1585/pfr.5.S2028

Details

Abstract

Toroidal nonneutral plasmas confined on helical magnetic surfaces with a helical axis are experimentally studied for the first time. Variations in space potential φ_s and electron density n_e 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.

Corresponding author

Register with J-STAGE for free!