Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bright, polarization-tunable high repetition rate extreme ultraviolet
  beamline for coincidence electron-ion imaging   After decades of supremacy of the Titanium:Sapphire technology,
Ytterbium-based high-order harmonic sources are emerging as an interesting
alternative for experiments requiring high flux of ultrashort extreme
ultraviolet (XUV) radiation. In this article we describe a versatile
experimental setup delivering XUV photons in the 10-50 eV range. The use of
cascaded high-harmonic generation enables us to reach 1.8 mW of average power
at 18 eV. Several spectral focusing schemes are presented, to select either a
single harmonic or group of high-harmonics and thus an attosecond pulse train.
In the perspective of circular dichroism experiments, we produce highly
elliptical XUV radiation using resonant elliptical high-harmonic generation,
and circularly polarized XUV by bichromatic bicircular high-harmonic
generation. As a proof of principle experiment, we focus the XUV beam in a
coincidence electron-ion imaging spectrometer, where we measure the
photoelectron momentum angular distributions of xenon monomers and dimers.

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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: hep-ex