Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Imaging Refractometer for Density Fluctuation Measurements in High
  Energy Density Plasmas   We report on a recently developed laser-probing diagnostic which allows
direct measurements of ray-deflection angles in one axis, whilst retaining
imaging capabilities in the other axis. This allows us to measure the spectrum
of angular deflections from a laser beam which passes though a turbulent
high-energy-density plasma. This spectrum contains information about the
density fluctuations within the plasma, which deflect the probing laser over a
range of angles. %The principle of this diagnostic is described, along with our
specific experimental realisation. We create synthetic diagnostics using
ray-tracing to compare this new diagnostic with standard shadowgraphy and
schlieren imaging approaches, which demonstrates the enhanced sensitivity of
this new diagnostic over standard techniques. We present experimental data from
turbulence behind a reverse shock in a plasma and demonstrate that this
technique can measure angular deflections between 0.06 and 34 mrad,
corresponding to a dynamic range of over 500.

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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cs