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Spectroscopic Measurements of Neutral Hydrogen and Impurity Ion Densities with SMBI in GAMMA 10 Central Plasma

S. Kitade, M. Yoshikawa, Y. Nakashima, T. Mizuuchi, S. Kobayashi, K. Hosoi, T. Imai

Fusion Science and Technology

Volume 63 / Number 1T / May 2013 / Pages 340-342


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Supersonic Molecular Beam Injection (SMBI) experiments were performed at GAMMA 10 device under the collaboration with HELIOTRON Group of Kyoto University. In order to survey the effects of SMBI on the plasma behavior, we measured the plasma radiation by using the ultraviolet and visible (UV/V) spectroscopic system and study behavior of the neutral hydrogen and impurity ions emissions with using the collisional-radiative model (CR-model).

With SMBI, the neutral hydrogen density calculated by the CR-model was about 20 times larger than that without SMBI. Impurity densities of oxygen ions also increased with SMBI.

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