Measurement of the Density Profile of a Toroidal Non-neutral Plasma with a Wall-Probe Array
スポンサーリンク
概要
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The Ring Trap 1 (RT-1) device can confine a pure-electron plasma in the magnetospheric dipole field configuration [Z. Yoshida et al., Plasma Fusion Res. 1, 008 (2006); Y. Ogawa et al., Plasma Fusion Res. 4, 020 (2009); H. Saitoh et al., Plasma Fusion Res. 2, 045 (2007)]. While this system has proved long-term (typically about 400 s) stable confinement, the internal structure of the electron cloud has not been well understood. The spatial distribution of the charge density has been estimated using an array of wall probes. Multiple wall probes with current amplifiers and analog integration circuits were developed and used to estimate image charge profiles on the chamber walls. The electrons are trapped inside the separatrix during the injection phase. In the stable confinement phase, electrons shift toward the stronger magnetic field region and produce a rather peaked profile.
著者
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Morikawa Junji
Department Of Nuclear Engineering Faculty Of Engineering The University Of Tokyo
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YANO Yoshihisa
Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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YOSHIDA Zensho
Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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SAITOH Haruhiko
Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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MIZUSHIMA Tatsunori
Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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MORIKAWA Junji
Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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