Plasma and Fusion Research

Volume 13, 3401053 (2018)

Regular Articles

Divertor Plasma Simulation Experiment Using Hydrogen Ionizing Plasma and Helium Ion Beam in an RF Plasma Source DT-ALPHA
Hiroyuki TAKAHASHI, Takahiko KOBAYASHI, Peerapat BOONYARITTIPONG, Takeshi SAIKYO, Yusuke ISHIKAWA, Kenta OGASAWARA, Atsushi OKAMOTO1), Kenji TOBITA, Sumio KITAJIMA and Hidetoshi HASHIZUME
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
1)
Department of Applied Energy, Nagoya University, Nagoya 464-8603, Japan
(Received 27 December 2017 / Accepted 28 March 2018 / Published 22 May 2018)

Abstract

A helium ion beam was injected into hydrogen ionizing plasma using a radio-frequency plasma source to study divertor plasma. Optical emissions from the hydrogen Balmer series and Fulcher-α band were collected. The emissions of the hydrogen Balmer series clearly increased following the onset of the ion beam injection. The behavior of excited hydrogen atoms slightly depend on its excitation energy. In addition to the Balmer series, the emission from hydrogen molecules increased under the existence of energetic ions. These results indicate that the energetic ion collision affects the population density of the excited hydrogen atoms and molecules.

Keywords

divertor, energetic ion, Balmer series, Fulcher-α band, radio-frequency

DOI: 10.1585/pfr.13.3401053

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