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, M. Hasegawa, Y. Nagashima, K. NariharaI. Yamada, H. Tojo

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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 number11D846
JournalReview of Scientific Instruments
Volume85
Issue number11
DOIs
Publication statusPublished - Nov 2014

All Science Journal Classification (ASJC) codes

  • Instrumentation

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