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
TL;DR
This paper reports on a long-term test of the X-ARAPUCA photon detection system, demonstrating its stability and estimating its photon detection efficiency in liquid argon over a 10-day period.
Contribution
It provides the first long-term stability assessment of the X-ARAPUCA system in liquid argon and offers preliminary efficiency measurements.
Findings
Stable operation over 10 days in liquid argon
Preliminary estimation of photon detection efficiency
Successful detection of alpha-induced photons
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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Taxonomy
TopicsRadiation Detection and Scintillator Technologies · Particle Detector Development and Performance · Nuclear Physics and Applications