Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Method to Determine the Maximum Radius of Defocused Protons after
  Self-Modulation in AWAKE   The AWAKE experiment at CERN aims to drive GV/m plasma wakefields with a
self-modulated proton drive bunch, and to use them for electron acceleration.
During the self-modulation process, protons are defocused by the transverse
plasma wakefields and form a halo around the focused bunch core. The two-screen
setup integrated in AWAKE measures the transverse, time-integrated proton bunch
distribution downstream the \unit[10]{m} long plasma to detect defocused
protons. By measuring the maximum radius of the defocused protons we attempt
calculate properties of the self-modulation. In this article, we develop a
routine to identify the maximum radius of the defocused protons, based on a
standard contour method. We compare the maximum radius obtained from the
contour to the logarithmic lineouts of the image to show that the determined
radius identifies the edge of the distribution.

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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin