Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simultaneous scintillation light and charge readout of a pure argon
  filled Spherical Proportional Counter   The possible use of a Spherical Proportional Counter for the search of
neutrinoless double beta decay is investigated in the R2D2 R&D project. Dual
charge and scintillation light readout may improve the detector performance.
Tests were carried out with pure argon at 1.1 bar using a 6x6 mm2 silicon
photomultiplier. Scintillation light was used for the first time to trigger in
a spherical proportional counter. The measured drift time is in excellent
agreement with the expectations from simulations. Furthermore the light signal
emitted during the avalanche development exhibits features that could be
exploited for event characterisation.

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The categories of this paper are: stat
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
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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: solv-int
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat