Plasma and Fusion Research

Volume 13, 1402033 (2018)

Regular Articles

Mode Structure Analysis of Detached Plasmas with 2D Images
Shin KAJITA, Hirohiko TANAKA1), Noriyasu OHNO1) and Takuya ONDA1)
Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
1)
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
(Received 5 September 2017 / Accepted 25 March 2018 / Published 22 May 2018)

Abstract

In linear plasma devices, blob-like cross-field transport is enhanced especially in detached plasmas. Formation of blob-like plasmas in the linear plasma device NAGDIS-II was observed using a fast framing camera, and the mode analysis was conducted using the emission from the plasma column. From the Fourier analysis, it was seen that plasma instability was enhanced before the ejection of blob-like plasmas from the plasma column. It was found that blob-like plasmas are generated at the peripheral region of the plasma column associated with low mode number (m = 0 - 2) plasma instability inside the plasma column.

Keywords

detached plasma, plasma blob, mode analysis, plasma instability

DOI: 10.1585/pfr.13.1402033

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