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Fast synthetic X-mode Doppler reflectometry diagnostics for the full-f global gyrokinetic modeling of the FT-2 tokamak
- Source :
- PHYSICS OF PLASMAS. 25(8):1-9
- Publication Year :
- 2018
-
Abstract
- The fast linear (Born approximation) version of the X-mode Doppler reflectometry (DR) synthetic diagnostics is developed in the framework of the ELMFIRE global gyrokinetic modeling of the FT-2 tokamak ohmic discharge. The DR signal frequency spectra and the dependence of their frequency shift and shape on the probing antenna position are computed and shown to be similar to those measured in the high magnetic field side probing DR experiment at the FT-2 tokamak. The fluctuation poloidal velocities are determined using the DR experiment and synthetic diagnostics and shown to be within 15%. However, the computed and measured dependences of the DR signal power on the antenna position appear to be different presumably due to underestimation of the small-scale trapped electron mode turbulence component in the measurement region by the code.
- Subjects :
- Physics
Tokamak
ta114
Condensed Matter Physics
01 natural sciences
Signal
Spectral line
010305 fluids & plasmas
Computational physics
law.invention
symbols.namesake
law
0103 physical sciences
symbols
Plasma diagnostics
Born approximation
Antenna (radio)
010306 general physics
Reflectometry
Doppler effect
Subjects
Details
- Language :
- English
- ISSN :
- 1070664X
- Volume :
- 25
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- PHYSICS OF PLASMAS
- Accession number :
- edsair.doi.dedup.....bbf6785a442c6b26f8431cfd098d088a
- Full Text :
- https://doi.org/10.1063/1.5034781