PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Dark Matter and its Detection
Characterization of low-energy argon recoils with the ReD experiment
I. Ahmad, S. Albergo, I.F.M. Albuquerque, M. Atzori Corona, M. Ave, B. Bottino, M. Cadeddu, A. Caminata, N. Canci, R. Cesarano, S. Davini, L.K.S. Dias, F. Di Capua, G. Dolganov, G. Fiorillo, D. Franco, M. Gulino, N. Kemmerich, M. Kimura, M. Kuzniak, M. La Commara, G. Matteucci, E. Moura Santos, V. Oleynikov, L. Pandola*, R. Perez Varona, N. Pino, S.M.R. Puglia, M. Rescigno, B. Sales Costa, S. Sanfilippo, C. Sunny, Y. Suvorov, R. Tartaglia, G. Testera, A. Tricomi, M. Wada, Y. Wang, R. Wojaczynski, P. Zakhary  on behalf of the DarkSide-20k Collaborationet al. (click to show)
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Pre-published on: January 22, 2024
Published on: March 22, 2024
The Recoil Directionality project (ReD) within the Global Argon Dark Matter Collaboration aims to characterize the response of an argon dual-phase Time Projection Chamber (TPC) to neutron-induced nuclear recoils, and to measure the charge yield for low-energy recoils. The charge yield is a critical parameter for the experiments searching for dark matter in the form of low-mass WIMPs and measurements in Ar below 10 keV are scarce in the literature. ReD was designed to cover this gap, by irradiating a miniaturized TPC with neutrons produced by an intense $^{252}$Cf fission source, such to generate Ar recoils in the energy range of interest. Data were collected during the Winter of 2023 at the INFN Sezione di Catania. The energy of the nuclear recoils produced within the TPC by (n,n') scattering was determined by detecting the outgoing neutrons by a neutron spectrometer made of 18 plastic scintillators. The neutron kinetic energy was evaluated event-by-event by using a time-of-flight approach. The ionization signal was measured for Ar recoils down to 2 keV.
DOI: https://doi.org/10.22323/1.441.0052
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