Related Experiment Video
Updated: Jul 18, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Ray-tracing analysis for cross-polarization scattering diagnostic on MAST-upgrade spherical tokamak
R Hong1, T L Rhodes1, G Wang1
1Physics and Astronomy Department, University of California, Los Angeles, California 90095, USA.
Abstract:
A combined Doppler backscattering/cross-polarization scattering (DBS/CPS) system is being deployed on MAST-U for simultaneous measurements of local density turbulence, turbulence flows, and magnetic turbulence. In this design, CPS shares the probing beam with the DBS and uses a separate parallel-viewing receiver system. In this study, we utilize a modified GENRAY 3D ray-tracing code to simulate the propagation of the probing and scattered beams. The contributions of different scattering locations along the entire beam trajectories are considered, and the corresponding local B̃ wavenumbers are estimated using the wavevector matching criterion. The wavenumber ranges of the local B̃ that are detectable to the CPS system are explored for simulated L- and H-mode plasmas.
Related Concept Videos
Transmission Line Design Considerations
Polar Coordinates: Problem Solving

