Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Regular Articles
Effect of Laval Nozzle in the GAMMA 10 SMBI Experiments
Md. Maidul ISLAM, Yousuke NAKASHIMA, Shinji KOBAYASHI, Nobuhiro NISHINO, Yuichiro NAKANO, Katsuhiro HOSOI, Kazuya ICHIMURA, Md. Shahinul ISLAM, Keita SHIMIZU, Kazuma FUKUI, Masato OHUCHI, Akihiro TERAKADO, Masayuki YOSHIKAWA, Junko KOHAGURA, Mafumi HIRATA, Ryuya IKEZOE, Xiaolong WANG, Makoto ICHIMURA, Mizuki SAKAMOTO, Tsuyoshi IMAI
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キーワード: GAMMA 10, supersonic molecular beam injection, Laval nozzle, Hα, high-speed camera
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2016 年 11 巻 p. 2402053

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Gas fueling by supersonic molecular beam injection (SMBI) has been performed at the central-cell in GAMMA 10. The results of SMBI experiment with plenum pressure from 0.3 MPa to 2.0 MPa were obtained using a laval nozzle. The distribution of the emission intensity during SMBI was investigated by the 2-dimensional image captured by the fast camera as an index of the neutral transport. The experimental results indicates that the effect of the laval nozzle reduces the dispersion of injected hydrogen molecules in the peripheral region. In this paper, we also studied the line density at the central-cell (NLcc) and Hα emission intensity during SMBI. Comparison between SMBI and conventional gas puffing is also discussed from the view point of the fueling efficiency.

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© 2016 by The Japan Society of Plasma Science and Nuclear Fusion Research
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