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Demonstration of improvement in the signal-to-noise ratio of Thomson scattering signal obtained by using a multi-pass optical cavity on the Tokyo Spherical Tokamak-2.
Togashi, H; Ejiri, A; Hiratsuka, J; Nakamura, K; Takase, Y; Yamaguchi, T; Furui, H; Imamura, K; Inada, T; Kakuda, H; Nakanishi, A; Oosako, T; Shinya, T; Sonehara, M; Tsuda, S; Tsujii, N; Wakatsuki, T; Hasegawa, M; Nagashima, Y; Narihara, K; Yamada, I; Tojo, H.
Afiliación
  • Togashi H; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Ejiri A; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Hiratsuka J; Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Nakamura K; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Takase Y; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Yamaguchi T; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Furui H; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Imamura K; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Inada T; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Kakuda H; Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Nakanishi A; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Oosako T; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Shinya T; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Sonehara M; Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Tsuda S; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Tsujii N; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Wakatsuki T; Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Hasegawa M; Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.
  • Nagashima Y; Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.
  • Narihara K; Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.
  • Yamada I; National Institute for Fusion Science, Toki 509-5292, Japan.
  • Tojo H; Japan Atomic Energy Agency, Naka 311-0193, Japan.
Rev Sci Instrum ; 85(11): 11D846, 2014 Nov.
Article en En | MEDLINE | ID: mdl-25430259
The multi-pass Thomson scattering (TS) scheme enables obtaining many photons by accumulating multiple TS signals. The signal-to-noise ratio (SNR) depends on the accumulation number. In this study, we performed multi-pass TS measurements for ohmically heated plasmas, and the relationship between SNR and the accumulation number was investigated. As a result, improvement of SNR in this experiment indicated similar tendency to that calculated for the background noise dominant situation.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2014 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2014 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos