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.
Highlights
Regarding the study of the behavior of the turbulence affecting transport, the multi-scale interaction of turbulence between macro, meso, and micro-scale structures is receiving much attention at present
We succeeded in increasing the radial observation points of microwave frequency comb Doppler reflectometer system
it is found that the perpendicular velocity profile is consistent with the
Summary
Regarding the study of the behavior of the turbulence affecting transport, the multi-scale interaction of turbulence between macro-, meso-, and micro-scale structures is receiving much attention at present. The system, which uses a frequency comb generator as a source and is constructed using a filter bank IQ detection for the Doppler shifted frequency calculation, is utilized for measuring the spatial structure of the parameters, and the temporal relationship between two (or many) points in space. These measurements are quite helpful for evaluating plasma turbulence, transport, and confinement phenomena.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
