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Dual-Comb Microwave Doppler Reflectometer System in LHD and Feasibility Study for a JT-60SA Doppler Reflectometer
https://repo.qst.go.jp/records/75835
https://repo.qst.go.jp/records/758358ec59293-a036-4f94-b951-75afa7de3ef6
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-05-17 | |||||
| タイトル | ||||||
| タイトル | Dual-Comb Microwave Doppler Reflectometer System in LHD and Feasibility Study for a JT-60SA Doppler Reflectometer | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
徳沢季彦
× 徳沢季彦× 稲垣滋× 江尻晶× 出射浩× Imazawa, Ryota× Oyama, Naoyuki× Yoshida, Maiko× 田中謙治× 土屋隼人× 居田克巳× Watanabe, K.Y.× Yamada, H.× Imazawa, Ryota× Oyama, Naoyuki× Yoshida, Maiko |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | New Ka-band frequency comb Doppler reflectometer systems has been installed in LHD. Previous frequency comb system needs a very high sampling rate (40 GS/s) digital storage system to obtain all frequency comb components in the probing beam, and the observable time is limited by the memory size. This time, a dual frequency comb sources with a 20 MHz difference are used to reduce the IF frequency components to less than 2 GHz, leading to lower sampling rate digitizers. In addition, the new receiver circuit requires standard radio frequency range components and a circuit board thanks to the IF reduction. Cost saving and better performance are achieved. Details of new system and some topical results observed in LHD plasma will be presented and the processing technique will be discussed. Study of the installation of Doppler reflectometer to JT-60SA has been carried. The preliminary results of a full-wave 3D numerical simulation for the feasibility study will be presented. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 14th International Reflectometry Workshop | |||||
| 発表年月日 | ||||||
| 日付 | 2019-05-23 | |||||
| 日付タイプ | Issued | |||||
