Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutral Kaon Spectrometer 2   A large-acceptance spectrometer, Neutral Kaon Spectrometer 2 (NKS2), was
newly constructed to explore various photoproduction reactions in the
gigaelectronvolt region at the Laboratory of Nuclear Science (LNS, currently
ELPH), Tohoku University. The spectrometer consisted of a dipole magnet, drift
chambers, and plastic scintillation counters. NKS2 was designed to separate
pions and protons in a momentum range of less than 1 GeV/$c$, and was placed in
a tagged photon beamline. A cryogenic H$_{2}$/D$_{2}$ target fitted to the
spectrometer were designed. The design and performance of the detectors are
described. The results of the NKS2 experiment on analyzing strangeness
photoproduction data using a 0.8--1.1 GeV tagged photon beam are also
presented.

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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci