Beam model of Doppler backscattering

  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},
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… 

Validating and optimizing mismatch tolerance of Doppler backscattering measurements with the beam model (invited).

We use the beam model of Doppler backscattering (DBS), which was previously derived from beam tracing and the reciprocity theorem, to shed light on mismatch attenuation. This attenuation of the

Design elements and first data from a new Doppler backscattering system on the MAST-U spherical tokamak.

A new Doppler backscattering (DBS) system has been installed and tested on the MAST-U spherical tokamak. It utilizes eight simultaneous fixed frequency probe beams (32.5, 35, 37.5, 40, 42.5, 45,

Evaluation of a new DIII-D Doppler backscattering system for higher wavenumber measurement and signal enhancement.

The high density fluctuation poloidal wavenumber, kθ (kθ > 8 cm-1, kθρs > 5, ρs is the ion gyro radius using the ion sound velocity), measurement capability of a new Doppler backscattering (DBS)

A high-k mm-wave scattering diagnostic for measuring binormal wavenumber electron scale turbulence on MAST-U

  • D. SpeirsK. Ronald A. Field
  • Physics
    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



Phased array imaging of two dimensional Doppler microwave backscattering from spherical tokamak edge plasmas

Doppler backscattering (DBS) in 1D is an established and powerful fusion plasma diagnostic technique. In this thesis we explore the capability of the novel Synthetic Aperture Microwave Imaging

Plasma Physics and Controlled Fusion

The theory of turbulent transport of parallel momentum and ion heat by the interaction of stochastic magnetic fields and turbulence is presented. Attention is focused on determining the kinetic

Plasma Scattering of Electromagnetic Radiation: Theory and Measurement Techniques

This work presents one of the most powerful methods of plasma diagnosis in exquisite detail to guide researchers in the theory and measurement techniques of light scattering in plasmas. Light

A Unified Approach to Equilibrium Reconstruction

UKAEA/EURATOM Fusion Association, Culham Science Centre, Abingdon Oxon OX14 3DB; Association Euratom-CEA, CEA/DSM/DRFC, Centre d Cadarache 13108 Saint Paul lez Durance, France; General Atomics, San

Philosophical Transactions of the Royal Society of London

This book is coming as the best seller book today and when you are really a good reader or you're fans of the author, it does will be funny if you don't have this book.

Paraxial WKB solution of a scalar wave equation

Waves in Plasmas (New York: American Institute of Physics) ( DPP21/Session/CP11.66

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Quasioptical systems

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Plasma and Fusion Research 5 S2005–S2005 Beam model of Doppler backscattering

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What is the limiting polarization of electron cyclotron emission leaving a fusion plasma

  • Proc. 5th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonant Heating
  • 1985