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Tokuzawa T, Tsuchiya H, Tsujimura T, Emoto M, Nakanishi H, Inagaki S, Ida K, Yamada H, Ejiri A, Watanabe KY, Oguri K, Akiyama T, Tanaka K, Yamada I. Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:10H118. [PMID: 30399698 DOI: 10.1063/1.5035118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
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.
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Affiliation(s)
- T Tokuzawa
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Tsuchiya
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - T Tsujimura
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - M Emoto
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Nakanishi
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - K Ida
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Yamada
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - A Ejiri
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Y Watanabe
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - K Oguri
- Department of Energy Engineering and Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - T Akiyama
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - K Tanaka
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
| | - I Yamada
- National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan
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9
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Kawahata K, Peterson BJ, Akiyama T, Ashikawa N, Emoto M, Funaba H, Hamada Y, Ida K, Inagaki S, Ido T, Isobe M, Goto M, Mase A, Masuzaki S, Michael C, Morisaki T, Morita S, Muto S, Nagayama Y, Nakamura Y, Nakanishi H, Sakamoto R, Narihara K, Nishiura M, Ohdachi S, Okajima S, Osakabe M, Sakakibara S, Sanin A, Sasao M, Sato K, Shimizu A, Shoji M, Sudo S, Tamura N, Tanaka K, Toi K, Tokuzawa T, Veshchev EV, Vyacheslavov LN, Yamada I, Yoshinuma M. Overview of LHD Plasma Diagnostics. FUSION SCIENCE AND TECHNOLOGY 2010. [DOI: 10.13182/fst10-a10819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Kawahata
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Emoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - Y. Hamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Inagaki
- Kyushu University, Kasuga 816-8580, Japan
| | - T. Ido
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - A. Mase
- Kyushu University, Kasuga 816-8580, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - C. Michael
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Muto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - H. Nakanishi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Nishiura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Okajima
- Chubu University, Kasugai 487-8501, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - A. Sanin
- Budkel Institute of Nuclear Physics, Novosibirsk 630090, Russia
| | - M. Sasao
- Tohoku University, Sendai 980-8579, Japan
| | - K. Sato
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - N. Tamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - K. Tanaka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - K. Toi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - E. V. Veshchev
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | | | - I. Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
| | - M. Yoshinuma
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi 509-5292, Japan
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