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

H. Togashi, A. Ejiri, J. Hiratsuka, K. Nakamura, Y. Takase, T. Yamaguchi, H. Furui, K. Imamura, T. Inada, H. Kakuda, A. Nakanishi, T. Oosako, T. Shinya, M. Sonehara, S. Tsuda, N. Tsujii, T. Wakatsuki, Makoto Hasegawa, Yoshihiko Nagashima, K. NariharaI. Yamada, H. Tojo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number11D486
JournalReview of Scientific Instruments
Volume85
Issue number11
DOIs
Publication statusPublished - Jan 1 2014

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Thomson scattering
Signal to noise ratio
signal to noise ratios
Demonstrations
Scattering
cavities
Multiple scattering
background noise
tendencies
Photons
Plasmas
photons
Experiments

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

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, Makoto; Nagashima, Yoshihiko; Narihara, K.; Yamada, I.; Tojo, H.

In: Review of Scientific Instruments, Vol. 85, No. 11, 11D486, 01.01.2014.

Research output: Contribution to journalArticle

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 2014, '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', Review of Scientific Instruments, vol. 85, no. 11, 11D486. https://doi.org/10.1063/1.4891707
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, Makoto ; Nagashima, Yoshihiko ; Narihara, K. ; Yamada, I. ; Tojo, H. / 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. In: Review of Scientific Instruments. 2014 ; Vol. 85, No. 11.
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AU - Ejiri, A.

AU - Hiratsuka, J.

AU - Nakamura, K.

AU - Takase, Y.

AU - Yamaguchi, T.

AU - Furui, H.

AU - Imamura, K.

AU - Inada, T.

AU - Kakuda, H.

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AU - Tsuda, S.

AU - Tsujii, N.

AU - Wakatsuki, T.

AU - Hasegawa, Makoto

AU - Nagashima, Yoshihiko

AU - Narihara, K.

AU - Yamada, I.

AU - Tojo, H.

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