Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AugerPrime -- The upgrade of the Pierre Auger Observatory   Ultra-high-energy cosmic rays (UHECRs) are studied with giant ground-based
detector systems recording extensive air showers, induced by cosmic ray
particles in the atmosphere. Research at the Pierre Auger Observatory - the
largest of such detectors ever built -- largely contributed to a number of
breakthroughs and dramatically advanced our understanding of UHECRs.
Nonetheless, the results so far are still inconclusive as neither have the
sources of these most energetic particles known in the Universe been
determined, nor has the origin of the unambiguously established cosmic ray flux
suppression above 40 EeV been fully understood. At the same time, precise
measurements of the muon component of the extensive air showers on the ground
show discrepancies with the predictions of hadronic interaction models. The
explanation of these puzzles, which are closely related to each other, is one
of the most important goals of modern astrophysics.
  The results obtained by the Pierre Auger Observatory indicate that further
advances in understanding UHECRs require an improvement of the measuring
capabilities of existing detectors, where the key feature is a superior
separation of the muonic and electromagnetic components of air showers.
AugerPrime, the ongoing upgrade of the Pierre Auger Observatory has been
designed for this task. The main objective of the AugerPrime is to enhance the
sensitivity of our analyses to the masses of cosmic rays, which will help to
elucidate the origin of the UHECRs. In this paper we overview the main features
of the AugerPrime design, its current status, and discuss the goals and
potential capabilities of the upgraded Observatory.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga