The stability of a dark matter detector on the timescale of a few years is a key requirement due to the large exposure needed to achieve a competitive sensitivity. It is especially crucial to enable the detector to potentially detect any annual event rate modulation, an expected dark matter signature. In this work, we present the performance history of the DarkSide-50 dual-phase argon time projection chamber over its almost three-year low-radioactivity argon run. In particular, we focus on the electroluminescence signal that enables sensitivity to sub-keV energy depositions. The stability of the electroluminescence yield is found to be better than 0.5%. Finally, we show the temporal evolution of the observed event rate around the sub-keV region being consistent to the background prediction.
Long-term temporal stability of the DarkSide-50 dark matter detector / P. Agnes, I. Albuquerque, T. Alexander, A. Alton, M. Ave, H. Back, G. Batignani, K. Biery, V. Bocci, W. Bonivento, B. Bottino, S. Bussino, M. Cadeddu, M. Cadoni, F. Calaprice, A. Caminata, M. Campos, N. Canci, M. Caravati, N. Cargioli, M. Cariello, M. Carlini, V. Cataudella, P. Cavalcante, S. Cavuoti, S. Chashin, A. Chepurnov, C. Cicalo, G. Covone, D. D'Angelo, S. Davini, A. De Candia, S. De Cecco, G. De Filippis, G. De Rosa, A. Derbin, A. Devoto, M. D'Incecco, C. Dionisi, F. Dordei, M. Downing, D. D'Urso, M. Fairbairn, G. Fiorillo, D. Franco, F. Gabriele, C. Galbiati, C. Ghiano, C. Giganti, G. Giovanetti, A. Goretti, G. Grilli di Cortona, A. Grobov, M. Gromov, M. Guan, M. Gulino, B. Hackett, K. Herner, T. Hessel, B. Hosseini, F. Hubaut, T. Hugues, E. Hungerford, A. Ianni, V. Ippolito, K. Keeter, C. Kendziora, M. Kimura, I. Kochanek, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M. Kuzniak, M. La Commara, M. Lai, X. Li, M. Lissia, G. Longo, O. Lychagina, I. Machulin, L. Mapelli, S. Mari, J. Maricic, A. Messina, R. Milincic, J. Monroe, M. Morrocchi, X. Mougeot, V. Muratova, P. Musico, A. Nozdrina, A. Oleinik, F. Ortica, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paoloni, K. Pelczar, N. Pelliccia, S. Piacentini, A. Pocar, D. Poehlmann, S. Pordes, S. Poudel, P. Pralavorio, D. Price, F. Ragusa, M. Razeti, A. Razeto, A. Renshaw, M. Rescigno, J. Rode, A. Romani, D. Sablone, O. Samoylov, E. Sandford, W. Sands, S. Sanfilippo, C. Savarese, B. Schlitzer, D. Semenov, A. Shchagin, A. Sheshukov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Stracka, Y. Suvorov, R. Tartaglia, G. Testera, A. Tonazzo, E. Unzhakov, A. Vishneva, R. Vogelaar, M. Wada, H. Wang, Y. Wang, S. Westerdale, M. Wojcik, X. Xiao, C. Yang, G. Zuzel. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 19:5(2024 May), pp. P05057.1-P05057.16. [10.1088/1748-0221/19/05/P05057]
Long-term temporal stability of the DarkSide-50 dark matter detector
D. D'Angelo;F. Ragusa;
2024
Abstract
The stability of a dark matter detector on the timescale of a few years is a key requirement due to the large exposure needed to achieve a competitive sensitivity. It is especially crucial to enable the detector to potentially detect any annual event rate modulation, an expected dark matter signature. In this work, we present the performance history of the DarkSide-50 dual-phase argon time projection chamber over its almost three-year low-radioactivity argon run. In particular, we focus on the electroluminescence signal that enables sensitivity to sub-keV energy depositions. The stability of the electroluminescence yield is found to be better than 0.5%. Finally, we show the temporal evolution of the observed event rate around the sub-keV region being consistent to the background prediction.
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