Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD

T. Tokuzawa, H. Tsuchiya, T. Tsujimura, M. Emoto, H. Nakanishi, Inagaki Shigeru, K. Ida, H. Yamada, A. Ejiri, K. Y. Watanabe, K. Oguri, T. Akiyama, K. Tanaka, I. Yamada

Research output: Contribution to journalArticle

Abstract

We succeeded in increasing the radial observation points of the microwave frequency comb Doppler reflectometer system from 8 to 20 (or especially up to 45) using the high sampling rate of 40 GS/s digital signal processing. For a new acquisition system, the estimation scheme of the Doppler shifted frequency is constructed and compared with the conventional technique. Also, the fine radial profile of perpendicular velocity is obtained, and it is found that the perpendicular velocity profile is consistent with the E × B drift velocity one.

Original languageEnglish
Article number10H118
JournalReview of Scientific Instruments
Volume89
Issue number10
DOIs
Publication statusPublished - Oct 1 2018

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digital data
reflectometers
Reflectometers
Microwave frequencies
microwave frequencies
data acquisition
Data acquisition
signal processing
acquisition
velocity distribution
sampling
Digital signal processing
profiles
Sampling

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD. / Tokuzawa, T.; Tsuchiya, H.; Tsujimura, T.; Emoto, M.; Nakanishi, H.; Shigeru, Inagaki; Ida, K.; Yamada, H.; Ejiri, A.; Watanabe, K. Y.; Oguri, K.; Akiyama, T.; Tanaka, K.; Yamada, I.

In: Review of Scientific Instruments, Vol. 89, No. 10, 10H118, 01.10.2018.

Research output: Contribution to journalArticle

Tokuzawa, T, Tsuchiya, H, Tsujimura, T, Emoto, M, Nakanishi, H, Shigeru, I, Ida, K, Yamada, H, Ejiri, A, Watanabe, KY, Oguri, K, Akiyama, T, Tanaka, K & Yamada, I 2018, 'Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD', Review of Scientific Instruments, vol. 89, no. 10, 10H118. https://doi.org/10.1063/1.5035118
Tokuzawa, T. ; Tsuchiya, H. ; Tsujimura, T. ; Emoto, M. ; Nakanishi, H. ; Shigeru, Inagaki ; Ida, K. ; Yamada, H. ; Ejiri, A. ; Watanabe, K. Y. ; Oguri, K. ; Akiyama, T. ; Tanaka, K. ; Yamada, I. / Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD. In: Review of Scientific Instruments. 2018 ; Vol. 89, No. 10.
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