Beam model of Doppler backscattering

@article{HallChen2021BeamMO,
  title={Beam model of Doppler backscattering},
  author={Valerian H Hall-Chen and Felix I. Parra and Jon C. Hillesheim},
  journal={Plasma Physics and Controlled Fusion},
  year={2021},
  volume={64}
}
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 for the DBS signal localisation and the wavenumber resolution. In determining these two quantities, we find that it is the… 

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    2022 15th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)
  • 2022
We describe a high-k mm-wave scattering diagnostic for measuring binormal wavenumber electron scale turbulence on the MAST-U spherical tokamak. Gaussian wave optics and beam-tracing calculations are

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