Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 84, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4825344
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Funding
- Natural Science Foundation of China (NSFC) [10990210, 10990211, 11105146]
- National Magnetic Confinement Fusion Energy Development Program of China [2010GB107000, 2013GB106002]
- Specialized Research Fund for the Doctoral Program of Higher Education [20113402120023]
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A Doppler reflectometer system has recently been installed in the Experimental Advanced Superconducting (EAST) Tokamak. It includes two separated systems, one for Q-band (33-50 GHz) and the other for V-band (50-75 GHz). The optical system consists of a flat mirror and a parabolic mirror which are optimized to improve the spectral resolution. A synthesizer is used as the source and a 20 MHz single band frequency modulator is used to get a differential frequency for heterodyne detection. Ray tracing simulations are used to calculate the scattering location and the perpendicular wave number. In EAST last experimental campaign, the Doppler shifted signals have been obtained and the radial profiles of the perpendicular propagation velocity during L-mode and H-mode are calculated. (C) 2013 AIP Publishing LLC.
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