Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A novel active veto prototype detector with an inner target for improved
  rare event searches   We report the fabrication and performance of an annular, cryogenic,
phonon-mediated veto detector that can host an inner target detector, allowing
substantial reduction in radiogenic backgrounds for rare event search
experiments. A germanium veto detector of mass $\sim$500 g with an outer
diameter of 76 mm and an inner diameter of 28 mm was produced. A 25 mm diameter
germanium inner target detector of mass $\sim$10 g was mounted inside the veto
detector. The detector was designed using inputs from a GEANT4 based
simulation, where it was modeled to be sandwiched between two germanium
detectors. The simulation showed that the background rates (dominantly gamma
interactions) could be reduced by $>$ 90$\%$, and that such an arrangement is
sufficient for aggressive background reduction needed for neutrino and dark
matter search experiments. During testing at the experimental site the veto
detector prototype achieved a baseline resolution of 1.24 $\pm$ 0.02 keV while
hosting a functional inner target detector. The baseline resolution of the
inner target detector was 147 $\pm$ 2 eV. The detectors were operated at mK
temperatures. The experimental results of an identical detector arrangement are
in excellent agreement with the simulation.

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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci