Measurement of the absolute efficiency of the X-ARAPUCA photon detector for the DUNE Far Detector 1

R. Álvarez-Garrote, C. Brizzolari, A. Canto +19

The Photon Detection System (PDS) of the first DUNE far detector (FD1) is composed of 6000 photon detection units, named X-ARAPUCA. The detection of the prompt light pulse generate…