Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Megahertz X-ray microscopy at X-ray Free-Electron Laser and Synchrotron
  sources   We demonstrate X-ray phase contrast microscopy performed at the European
X-ray Free-Electron Laser sampled at 1.128 MHz rate. We have applied this
method to image stochastic processes induced by an optical laser incident on
water-filled capillaries with micrometer scale spatial resolution. The
generated high speed water jet, cavitation formation and annihilation in water
and glass, as well as glass explosions are observed. The comparison between
XFEL and previous synchrotron MHz microscopy shows the superior contrast and
spatial resolution at the XFEL over the synchrotron. This work opens up new
possibilities for the characterization of dynamic stochastic systems on
nanosecond to microsecond time scales at megahertz rate with object velocities
up to few kilometers per second using X-ray Free-Electron Laser sources.

21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom