Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray optics and beam characterisation using random modulation:
  Experiments   In a previous paper, we reviewed theoretically some of the available
processing schemes for X-ray wavefront sensing based on random modulation. We
here show experimental applications of the technique for characterising both
refractive and reflective optical components. These fast and accurate X-ray
at-wavelength metrology methods can assist the manufacture of X-ray optics that
transport X-ray beams with minimum amount of wavefront distortion. We also
recall how such methods can facilitate online optimization of active optics.

9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn