A Numerical Study of Forward- and Backscattering Signatures on Doppler-Reflectometry Signals

In Doppler reflectometry, two scattering processes may be involved, Bragg backscattering and forward scattering. In this paper, a numerical study of both processes is undertaken using a finite-difference time-domain full-wave code with plasma parameters compatible with Tore Supra or Asdex Upgrade Do...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2010-09, Vol.38 (9), p.2144-2149
Main Authors: da Silva, Filipe, Heuraux, Stéphane, Gusakov, Evgeniy Z, Popov, Alexei
Format: Article
Language:English
Subjects:
Backscatter
Backscattering
Doppler
Doppler effect
FDTD
Finite difference method
Finite difference methods
Forward contracts
Mathematical analysis
Mathematical models
microwave Doppler reflectometry
Numerical analysis
Physics
Plasma
Plasma density
Plasma devices
Plasma Physics
Plasma simulation
Plasma waves
Reflectometers
Reflectometry
Scattering
Signatures
Simulation
Spectra
Time domain analysis
Turbulence
wave propagation in plasmas
wave scattering
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Summary:In Doppler reflectometry, two scattering processes may be involved, Bragg backscattering and forward scattering. In this paper, a numerical study of both processes is undertaken using a finite-difference time-domain full-wave code with plasma parameters compatible with Tore Supra or Asdex Upgrade Doppler reflectometers. The spectra modeling the plasma turbulence were chosen to isolate forward- and backscattering events, allowing the segregation of the two different signatures and bring forth the different mechanisms intervening in each of the cases. Some numerical precautions needed for this type of simulations are presented. The results obtained are compared with the theoretical models.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2010.2056703