Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Profile reconstruction of grazing-incidence X-ray mirrors from
  intra-focal X-ray full imaging   The optics of a number of future X-ray telescopes will have very long focal
lengths (10 - 20 m), and will consist of a number of nested/stacked thin,
grazing-incidence mirrors. The optical quality characterization of a real
mirror can be obtained via profile metrology, and the Point Spread Function of
the mirror can be derived via one of the standard computation methods. However,
in practical cases it can be difficult to access the optical surfaces of
densely stacked mirror shells, after they have been assembled, using the
widespread metrological tools. For this reason, the assessment of the imaging
resolution of a system of mirrors is better obtained via a direct,
full-illumination test in X-rays. If the focus cannot be reached, an
intra-focus test can be performed, and the image can be compared with the
simulation results based on the metrology, if available. However, until today
no quantitative information was extracted from a full-illumination, intra-focal
exposure. In this work we show that, if the detector is located at an optimal
distance from the mirror, the intensity variations of the intra-focal,
full-illumination image in single reflection can be used to reconstruct the
profile of the mirror surface, without the need of a wavefront sensor. The
Point Spread Function can be subsequently computed from the reconstructed
mirror shape. We show the application of this method to an intra-focal (8 m
distance from mirror) test performed at PANTER on an optical module prototype
made of hot-slumped glass foils with a 20 m focal length, from which we could
derive an expected imaging quality near 16 arcsec HEW.

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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: eess