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arxiv: 2301.00420 · v1 · pith:AC5WFTHZ · submitted 2023-01-01 · physics.ins-det

X-Arapuca long term test

V. Andreossi , Z. Balmforth , A. A. Bergamini Machado , G. Botogoske , N. Canci , R. de Aguiar , P. Duarte De Almeida , F. Di Capua
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G. Fiorillo G. Grauso G. Matteucci S. Ravinthiran E. Segreto Y. Suvorov
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keywords x-arapucaargondetectionliquidphotontestabsoluteallowed
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The photon detection system of the DUNE experiment is based on the X-ARAPUCA light trap. The basic elements of the X-ARAPUCA are the dichroic filters coated with wavelength shifter (para-Therphenyl), a waveshifting plate and an array of SiPMs which detects the trapped photons. A small scale prototype of the X-ARAPUCA has been installed in liquid argon in a dedicated facility at INFN-Napoli and exposed to alpha particles from a source. In order to test the stability of the overall device response the X-ARAPUCA was kept for 10 days in liquid argon continuously purified. The performed tests allowed for a preliminary estimation of the X-ARAPUCA absolute photon detection efficiency.

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