Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ray-tracing Analysis for Cross-polarization Scattering Diagnostic on
  MAST-Upgrade Spherical Tokamak   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 $\tilde{\mathbf{B}}$
wavenumbers are estimated using the wave-vector matching criterion. The
wavenumber ranges of the local $\tilde{\mathbf{B}}$ that is detectable to the
CPS system are explored for simulated L- and H-mode plasmas.

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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex