Plasma and Fusion Research

Volume 16, 1202013 (2021)

Rapid Communications


Doppler and Stark Broadenings of He II Emission in NAGDIS-PG
Shin KAJITA, Takaya NAKAMORI1), Hirohiko TANAKA1), Yusuke KIKUCHI2) and Noriyasu OHNO1)
Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
1)
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
2)
Graduate School of Engineering, University of Hyogo, Hyogo 671-2280, Japan
(Received 20 December 2020 / Accepted 5 January 2021 / Published 19 February 2021)

Abstract

Time evolutions of the emission from helium (He) ion at 468.6 nm were observed in the magnetized co-axial plasma gun device NAGDIS-PG, and the broadening of the spectrum was analyzed in terms of Doppler and Stark broadenings to deduce the ion temperature and the electron density. A significant broadening of the He II spectrum was identified around a dip in the discharge current, suggesting that increases in the temperature and density occurred.


Keywords

plasma gun, spectroscopy, Doppler broadening, Stark broadening

DOI: 10.1585/pfr.16.1202013


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