Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Trigger and Timing System of the Double Chooz Experiment   Modern precision neutrino experiments like Double Chooz require a highly
efficient trigger system in order to reduce systematic uncertainties. The
trigger and timing system of the Double Chooz experiment was designed according
to this goal. The Double Chooz trigger system is driven by the basic idea of
triggering on multiple thresholds according to the total visible energy and
additionally triggering on the number of active photomultiplier tubes (PMTs) in
the detector. To do so, the trigger system continuously monitors the analogue
signals from all PMTs in the detector. The amplitudes of these PMT-signals are
summed for groups of certain PMTs (group signals) and for all PMTs (sum
signal), respectively. The group signals are discriminated by two thresholds
for each input channel and four thresholds for the sum signal. The resulting
signals are processed by the trigger logic unit which is implemented in a FPGA.
In addition to the proper trigger, the trigger system provides a common clock
signal for all subsequent data acquisition systems to guarantee a synchronous
readout of the Double Chooz detectors. The present design of the system
provides a high flexibility for the applied logic and settings, making it
useful for experiments other than Double Chooz. The Double Chooz trigger and
timing system was installed and commissioned in 2011. This article describes
the hardware of the trigger and timing system. Furthermore the setup,
implemented trigger logic and performance of the trigger and timing system for
the Double Chooz experiment is presented.

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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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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: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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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: cond-mat