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arXiv · 2301.00420

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·G. Fiorillo·G. Grauso·G. Matteucci·S. Ravinthiran·E. Segreto·Y. Suvorov
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Abstract

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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V. Andreossi, Z. Balmforth, A. A. Bergamini Machado, G. Botogoske, N. Canci, R. de Aguiar, P. Duarte De Almeida, F. Di Capua, G. Fiorillo, G. Grauso, G. Matteucci, S. Ravinthiran, E. Segreto, Y. Suvorov. 2023-01-01. X-Arapuca long term test. https://arxiv.org/abs/2301.00420

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