Atoms (Aug 2020)
Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST
- Satoru Mori,
- Taiichi Shikama,
- Kazuaki Hanada,
- Nao Yoneda,
- Arseniy Kuzmin,
- Masahiro Hasuo,
- Hiroshi Idei,
- Takumi Onchi,
- Akira Ejiri,
- Yuki Osawa,
- Yi Peng,
- Kyohei Matsuzaki,
- Shinichiro Kado,
- Keiji Sawada,
- Takeshi Ido,
- Kazuo Nakamura,
- Ryuya Ikezoe,
- Yoshihiko Nagashima,
- Makoto Hasegawa,
- Kengo Kuroda,
- Aki Higashijima,
- Takahiro Nagata,
- Shun Shimabukuro
Affiliations
- Satoru Mori
- Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan
- Taiichi Shikama
- Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan
- Kazuaki Hanada
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Nao Yoneda
- Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan
- Arseniy Kuzmin
- Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan
- Masahiro Hasuo
- Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan
- Hiroshi Idei
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Takumi Onchi
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Akira Ejiri
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
- Yuki Osawa
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
- Yi Peng
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
- Kyohei Matsuzaki
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
- Shinichiro Kado
- Institute of Advanced Energy, Kyoto University, Kyoto 610-0011, Japan
- Keiji Sawada
- Graduate School of Engineering, Shinshu University, Nagano 380-8553, Japan
- Takeshi Ido
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Kazuo Nakamura
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Ryuya Ikezoe
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Yoshihiko Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Makoto Hasegawa
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Kengo Kuroda
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Aki Higashijima
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Takahiro Nagata
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- Shun Shimabukuro
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
- DOI
- https://doi.org/10.3390/atoms8030044
- Journal volume & issue
-
Vol. 8,
no. 3
p. 44
Abstract
The spatial distribution of the hydrogen atom density was evaluated in a spherical tokamak (ST) plasma sustained only with 28 GHz electron cyclotron heating (ECH). The radially resolved Hδ emissivity was measured using multiple viewing chord spectroscopy and Abel inversion. A collisional-radiative (CR) model analysis of the emissivity resulted in a ground-state hydrogen atom density of 1015–1016 m−3 and an ionization degree of 1–0.85 in the plasma.
Keywords
