Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detecting an infrared Photon within an Hour -- Transition-Edge Detector
  at ALPS-II   An essential design requirement of the ALPS-II experiment is the efficient
detection of single photons with a very low instrumental background of 10
{\mu}Hz. In 2011 the ALPS collaboration started to set up a TES detector
(Transition-Edge Sensor) for ALPS-II, the second phase of the experiment. Since
mid of 2013 the setup is ready for characterization in the ALPS laboratory: an
ADR cryostat (Adiabatic Demagnetization Refrigerator) as millikelvin
environment, a low noise SQUID (Superconducting Quantum Interference Device)
with electronics for read-out and a fiber-coupled high-efficient TES for
near-infrared photons as sensor. First measurements have shown a good
discrimination between noise and 1064 nm signals.

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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg