Corpus ID: 237605091

Beam model of Doppler backscattering

@inproceedings{HallChen2021BeamMO,
  title={Beam model of Doppler backscattering},
  author={Valerian H Hall-Chen and F. I. Parra and J. C. Hillesheim},
  year={2021}
}
We use beam tracing — implemented with a newly-written code, Scotty — and the reciprocity theorem to derive a model for the linear backscattered power of the Doppler Backscattering (DBS) diagnostic. Our model works for both the O-mode and X-mode in tokamak geometry (and certain regimes of stellarators). We present the analytical derivation of our model and its implications on the DBS signal localisation and the wavenumber resolution. To determine these two quantities, we find that it is the… Expand

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