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Characterization of spurious-electron signals in the double-phase argon TPC of the DarkSide-50 experiment

Fuente: arXiv
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Auteurs principaux: 50 Collaboration, Agnes, P., Albuquerque, I. F., Alexander, T., Alton, A. K., Ave, M., Back, H. O., Batignani, G., Berzin, E., Biery, K., Bocci, V., Bonivento, W. M., Bottino, B., Bussino, S., Cadeddu, M., Cadoni, M., Calaprice, F., Caminata, A., Campos, M. D., Canci, N., Caravati, M., Cargioli, N., Cariello, M., Carlini, M., Cataudella, V., Cavalcante, P., Cavuoti, S., Chashin, S., Chepurnov, A., Cicalò, C., Covone, G., D'Angelo, D., Davini, S., De Candia, A., De Cecco, S., De Filippis, G., De Rosa, G., Derbin, A. V., Devoto, A., D'Incecco, M., Dionisi, C., Dordei, F., Downing, M., D'Urso, D., Fairbairn, M., Fiorillo, G., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giganti, C., Giovanetti, G. K., Goretti, A. M., di Cortona, G. Grilli, Grobov, A., Gromov, M., Guam, M., Gulino, M., Hackett, B. R., Herner, K., Hessel, T., Hosseini, B., Hubaut, F., Hugues, T., Hungerford, E. V., Ianni, A., Ippolito, V., Keeter, K., Kendziora, C. L., Kimura, M., Kochanek, I., Korablev, D., Korga, G., Kubankin, A., Kuss, M., Kuźniak, M., La Commara, M., Lai, M., Li, X., Lissia, M., Longo, G., Lychagina, O., Machulin, I. N., Mapelli, L. P., Mari, S. M., Maricic, J., Messina, A., Milincic, R., Monroe, J., Morrocchi, M., Muratova, V. N., Musico, P., Nozdrina, A. O., Oleinik, A., Ortica, F., Pagani, L., Pallavicini, M., Pandola, L., Pantic, E., Paoloni, E., Pelczar, K., Pelliccia, N., Piacentini, S., Pocar, A., Poehlmann, M., Pordes, S., Poudel, S. S., Pralavorio, P., Price, D., Ragusa, F., Razeti, M., Razeto, A., Renshaw, A. L., Rescigno, M., Rode, J., Romani, A., Sablone, D., Samoylov, O., Sandford, E., Sands, W., Sanfilippo, S., Savarese, C., Schlitzer, B., Semenov, D. A., Shchagin, A., Sheshukov, A., Skorokhvatov, M. D., Smirnov, O., Sotnikov, A., Stefanizzi, R., Stracka, S., Sunny, C., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Unzhakov, E. V., Vishneva, A., Vogelaar, R. B., Wada, M., Wang, H., Wang, Y., Westerdale, S., Wojcik, M. M., Xiao, X., Yang, C., Zuzel, G.
Format: Preprint
Publié: 2025
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High Energy Physics - Experiment
Instrumentation and Detectors
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_version_ 1866911085344325632
author 50 Collaboration
Agnes, P.
Albuquerque, I. F.
Alexander, T.
Alton, A. K.
Ave, M.
Back, H. O.
Batignani, G.
Berzin, E.
Biery, K.
Bocci, V.
Bonivento, W. M.
Bottino, B.
Bussino, S.
Cadeddu, M.
Cadoni, M.
Calaprice, F.
Caminata, A.
Campos, M. D.
Canci, N.
Caravati, M.
Cargioli, N.
Cariello, M.
Carlini, M.
Cataudella, V.
Cavalcante, P.
Cavuoti, S.
Chashin, S.
Chepurnov, A.
Cicalò, C.
Covone, G.
D'Angelo, D.
Davini, S.
De Candia, A.
De Cecco, S.
De Filippis, G.
De Rosa, G.
Derbin, A. V.
Devoto, A.
D'Incecco, M.
Dionisi, C.
Dordei, F.
Downing, M.
D'Urso, D.
Fairbairn, M.
Fiorillo, G.
Franco, D.
Gabriele, F.
Galbiati, C.
Ghiano, C.
Giganti, C.
Giovanetti, G. K.
Goretti, A. M.
di Cortona, G. Grilli
Grobov, A.
Gromov, M.
Guam, M.
Gulino, M.
Hackett, B. R.
Herner, K.
Hessel, T.
Hosseini, B.
Hubaut, F.
Hugues, T.
Hungerford, E. V.
Ianni, A.
Ippolito, V.
Keeter, K.
Kendziora, C. L.
Kimura, M.
Kochanek, I.
Korablev, D.
Korga, G.
Kubankin, A.
Kuss, M.
Kuźniak, M.
La Commara, M.
Lai, M.
Li, X.
Lissia, M.
Longo, G.
Lychagina, O.
Machulin, I. N.
Mapelli, L. P.
Mari, S. M.
Maricic, J.
Messina, A.
Milincic, R.
Monroe, J.
Morrocchi, M.
Muratova, V. N.
Musico, P.
Nozdrina, A. O.
Oleinik, A.
Ortica, F.
Pagani, L.
Pallavicini, M.
Pandola, L.
Pantic, E.
Paoloni, E.
Pelczar, K.
Pelliccia, N.
Piacentini, S.
Pocar, A.
Poehlmann, M.
Pordes, S.
Poudel, S. S.
Pralavorio, P.
Price, D.
Ragusa, F.
Razeti, M.
Razeto, A.
Renshaw, A. L.
Rescigno, M.
Rode, J.
Romani, A.
Sablone, D.
Samoylov, O.
Sandford, E.
Sands, W.
Sanfilippo, S.
Savarese, C.
Schlitzer, B.
Semenov, D. A.
Shchagin, A.
Sheshukov, A.
Skorokhvatov, M. D.
Smirnov, O.
Sotnikov, A.
Stefanizzi, R.
Stracka, S.
Sunny, C.
Suvorov, Y.
Tartaglia, R.
Testera, G.
Tonazzo, A.
Unzhakov, E. V.
Vishneva, A.
Vogelaar, R. B.
Wada, M.
Wang, H.
Wang, Y.
Westerdale, S.
Wojcik, M. M.
Xiao, X.
Yang, C.
Zuzel, G.
author_facet 50 Collaboration
Agnes, P.
Albuquerque, I. F.
Alexander, T.
Alton, A. K.
Ave, M.
Back, H. O.
Batignani, G.
Berzin, E.
Biery, K.
Bocci, V.
Bonivento, W. M.
Bottino, B.
Bussino, S.
Cadeddu, M.
Cadoni, M.
Calaprice, F.
Caminata, A.
Campos, M. D.
Canci, N.
Caravati, M.
Cargioli, N.
Cariello, M.
Carlini, M.
Cataudella, V.
Cavalcante, P.
Cavuoti, S.
Chashin, S.
Chepurnov, A.
Cicalò, C.
Covone, G.
D'Angelo, D.
Davini, S.
De Candia, A.
De Cecco, S.
De Filippis, G.
De Rosa, G.
Derbin, A. V.
Devoto, A.
D'Incecco, M.
Dionisi, C.
Dordei, F.
Downing, M.
D'Urso, D.
Fairbairn, M.
Fiorillo, G.
Franco, D.
Gabriele, F.
Galbiati, C.
Ghiano, C.
Giganti, C.
Giovanetti, G. K.
Goretti, A. M.
di Cortona, G. Grilli
Grobov, A.
Gromov, M.
Guam, M.
Gulino, M.
Hackett, B. R.
Herner, K.
Hessel, T.
Hosseini, B.
Hubaut, F.
Hugues, T.
Hungerford, E. V.
Ianni, A.
Ippolito, V.
Keeter, K.
Kendziora, C. L.
Kimura, M.
Kochanek, I.
Korablev, D.
Korga, G.
Kubankin, A.
Kuss, M.
Kuźniak, M.
La Commara, M.
Lai, M.
Li, X.
Lissia, M.
Longo, G.
Lychagina, O.
Machulin, I. N.
Mapelli, L. P.
Mari, S. M.
Maricic, J.
Messina, A.
Milincic, R.
Monroe, J.
Morrocchi, M.
Muratova, V. N.
Musico, P.
Nozdrina, A. O.
Oleinik, A.
Ortica, F.
Pagani, L.
Pallavicini, M.
Pandola, L.
Pantic, E.
Paoloni, E.
Pelczar, K.
Pelliccia, N.
Piacentini, S.
Pocar, A.
Poehlmann, M.
Pordes, S.
Poudel, S. S.
Pralavorio, P.
Price, D.
Ragusa, F.
Razeti, M.
Razeto, A.
Renshaw, A. L.
Rescigno, M.
Rode, J.
Romani, A.
Sablone, D.
Samoylov, O.
Sandford, E.
Sands, W.
Sanfilippo, S.
Savarese, C.
Schlitzer, B.
Semenov, D. A.
Shchagin, A.
Sheshukov, A.
Skorokhvatov, M. D.
Smirnov, O.
Sotnikov, A.
Stefanizzi, R.
Stracka, S.
Sunny, C.
Suvorov, Y.
Tartaglia, R.
Testera, G.
Tonazzo, A.
Unzhakov, E. V.
Vishneva, A.
Vogelaar, R. B.
Wada, M.
Wang, H.
Wang, Y.
Westerdale, S.
Wojcik, M. M.
Xiao, X.
Yang, C.
Zuzel, G.
contents Spurious-electron signals in dual-phase noble-liquid time projection chambers have been observed in both xenon and argon Time Projection Chambers (TPCs). This paper presents the first comprehensive study of spurious electrons in argon, using data collected by the DarkSide-50 experiment at the INFN Laboratori Nazionali del Gran Sasso (LNGS). Understanding these events is a key factor in improving the sensitivity of low-mass dark matter searches exploiting ionization signals in dual-phase noble liquid TPCs. We find that a significant fraction of spurious-electron events, ranging from 30 to 70% across the experiment's lifetime, are caused by electrons captured from impurities and later released with delays of order 5-50 ms. The rate of spurious-electron events is found to correlate with the operational condition of the purification system and the total event rate in the detector. Finally, we present evidence that multi-electron spurious electron events may originate from photo-ionization of the steel grid used to define the electric fields. These observations indicate the possibility of reduction of the background in future experiments and hint at possible spurious electron production mechanisms.
format Preprint
id arxiv_https___arxiv_org_abs_2507_23003
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Characterization of spurious-electron signals in the double-phase argon TPC of the DarkSide-50 experiment
50 Collaboration
Agnes, P.
Albuquerque, I. F.
Alexander, T.
Alton, A. K.
Ave, M.
Back, H. O.
Batignani, G.
Berzin, E.
Biery, K.
Bocci, V.
Bonivento, W. M.
Bottino, B.
Bussino, S.
Cadeddu, M.
Cadoni, M.
Calaprice, F.
Caminata, A.
Campos, M. D.
Canci, N.
Caravati, M.
Cargioli, N.
Cariello, M.
Carlini, M.
Cataudella, V.
Cavalcante, P.
Cavuoti, S.
Chashin, S.
Chepurnov, A.
Cicalò, C.
Covone, G.
D'Angelo, D.
Davini, S.
De Candia, A.
De Cecco, S.
De Filippis, G.
De Rosa, G.
Derbin, A. V.
Devoto, A.
D'Incecco, M.
Dionisi, C.
Dordei, F.
Downing, M.
D'Urso, D.
Fairbairn, M.
Fiorillo, G.
Franco, D.
Gabriele, F.
Galbiati, C.
Ghiano, C.
Giganti, C.
Giovanetti, G. K.
Goretti, A. M.
di Cortona, G. Grilli
Grobov, A.
Gromov, M.
Guam, M.
Gulino, M.
Hackett, B. R.
Herner, K.
Hessel, T.
Hosseini, B.
Hubaut, F.
Hugues, T.
Hungerford, E. V.
Ianni, A.
Ippolito, V.
Keeter, K.
Kendziora, C. L.
Kimura, M.
Kochanek, I.
Korablev, D.
Korga, G.
Kubankin, A.
Kuss, M.
Kuźniak, M.
La Commara, M.
Lai, M.
Li, X.
Lissia, M.
Longo, G.
Lychagina, O.
Machulin, I. N.
Mapelli, L. P.
Mari, S. M.
Maricic, J.
Messina, A.
Milincic, R.
Monroe, J.
Morrocchi, M.
Muratova, V. N.
Musico, P.
Nozdrina, A. O.
Oleinik, A.
Ortica, F.
Pagani, L.
Pallavicini, M.
Pandola, L.
Pantic, E.
Paoloni, E.
Pelczar, K.
Pelliccia, N.
Piacentini, S.
Pocar, A.
Poehlmann, M.
Pordes, S.
Poudel, S. S.
Pralavorio, P.
Price, D.
Ragusa, F.
Razeti, M.
Razeto, A.
Renshaw, A. L.
Rescigno, M.
Rode, J.
Romani, A.
Sablone, D.
Samoylov, O.
Sandford, E.
Sands, W.
Sanfilippo, S.
Savarese, C.
Schlitzer, B.
Semenov, D. A.
Shchagin, A.
Sheshukov, A.
Skorokhvatov, M. D.
Smirnov, O.
Sotnikov, A.
Stefanizzi, R.
Stracka, S.
Sunny, C.
Suvorov, Y.
Tartaglia, R.
Testera, G.
Tonazzo, A.
Unzhakov, E. V.
Vishneva, A.
Vogelaar, R. B.
Wada, M.
Wang, H.
Wang, Y.
Westerdale, S.
Wojcik, M. M.
Xiao, X.
Yang, C.
Zuzel, G.
High Energy Physics - Experiment
Instrumentation and Detectors
Spurious-electron signals in dual-phase noble-liquid time projection chambers have been observed in both xenon and argon Time Projection Chambers (TPCs). This paper presents the first comprehensive study of spurious electrons in argon, using data collected by the DarkSide-50 experiment at the INFN Laboratori Nazionali del Gran Sasso (LNGS). Understanding these events is a key factor in improving the sensitivity of low-mass dark matter searches exploiting ionization signals in dual-phase noble liquid TPCs. We find that a significant fraction of spurious-electron events, ranging from 30 to 70% across the experiment's lifetime, are caused by electrons captured from impurities and later released with delays of order 5-50 ms. The rate of spurious-electron events is found to correlate with the operational condition of the purification system and the total event rate in the detector. Finally, we present evidence that multi-electron spurious electron events may originate from photo-ionization of the steel grid used to define the electric fields. These observations indicate the possibility of reduction of the background in future experiments and hint at possible spurious electron production mechanisms.
title Characterization of spurious-electron signals in the double-phase argon TPC of the DarkSide-50 experiment
topic High Energy Physics - Experiment
Instrumentation and Detectors
url https://arxiv.org/abs/2507.23003

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