在大型螺旋装置中应用快速数字数据采集系统的微波频率梳多普勒反射仪。

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

作者信息

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

机构信息

National Institutes of Natural Sciences, National Institute for Fusion Science, Toki 509-5292, Japan.

Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.

出版信息

Rev Sci Instrum. 2018 Oct;89(10):10H118. doi: 10.1063/1.5035118.

DOI:10.1063/1.5035118

PMID:30399698

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 × drift velocity one.

摘要

我们利用40 GS/s的高采样率数字信号处理，成功地将微波频率梳多普勒反射仪系统的径向观测点从8个增加到20个（特别是高达45个）。对于一个新的采集系统，构建了多普勒频移的估计方案，并与传统技术进行了比较。此外，还获得了垂直速度的精细径向分布，发现垂直速度分布与×漂移速度分布一致。