Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pulse-to-pulse wavefront sensing at free-electron lasers using
  ptychography   The pressing need for the detailed wavefront properties of ultra-bright and
ultra-short pulses produced by free-electron lasers (FELs) has spurred the
development of several complementary characterization approaches. Here we
present a method based on ptychography that can retrieve full high-resolution
complex-valued wave functions of individual pulses. Our technique is
demonstrated within experimental conditions suited for diffraction experiments
in their native imaging state. This lensless technique, applicable to many
other short-pulse instruments, can achieve diffraction-limited resolution.

28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th
1
The categories of this paper are: cs