Plasma and Fusion Research

Volume 14, 2405031 (2019)

Regular Articles

Development of Thomson Scattering Measurement System for Upstream Plasmas in the NAGDIS-II Device
Hiroki TAKANO1), Hiroshi OHSHIMA1), Shin KAJITA2), Hirohiko TANAKA1) and Noriyasu OHNO1)
1)
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
2)
Institute of Materials and System for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
(Received 27 September 2018 / Accepted 9 December 2018 / Published 25 February 2019)

Abstract

A new laser Thomson scattering (LTS) measurement system in the upstream region of the linear plasma device NAGDIS-II is established in addition to the recently introduced LTS in the downstream. Further, horizontal distributions of the electron temperature and electron density were compared with those obtained from the Langmuir probe, indicating plasma disturbance due to the insertion of the probe head. We discuss the variation of the electron energy distribution function at upstream and downstream in the recombining plasma.

Keywords

laser Thomson scattering, NAGDIS-II, recombining plasma, Langmuir probe, electron energy distribution function

DOI: 10.1585/pfr.14.2405031

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