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Anisotropy in Broad Component of Hα Line in the Magnetospheric Device RT-1

Yohei KAWAZURA, Noriki TAKAHASHI, Zensho YOSHIDA, Masaki NISHIURA, Tomoaki NOGAMI, Ankur KASHYAP, Yoshihisa YANO, Haruhiko SAITOH, Miyuri YAMASAKI, Toshiki MUSHIAKE and Masataka NAKATSUKA

Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8561, Japan

(Received 30 November 2015 / Accepted 3 February 2016 / Published 17 March 2016)

Abstract

Temperature anisotropy in broad component of Hα line was found in the ring trap 1 (RT-1) device by Doppler spectroscopy. Since hot hydrogen neutrals emitting a broad component are mainly produced by charge exchange between neutrals and protons, the anisotropy in the broad component is the evidence of proton temperature anisotropy generated by betatron acceleration.

Copyright (c) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

magnetosphere, broad component of Hα, temperature anisotropy, inward diffusion, betatron acceleration, spectroscopy

DOI: 10.1585/pfr.11.2402024

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