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Capturing methane in a barn environment: the CH4 Livestock Emission (CH4rLiE) project
/ Angiulli, Francesco Alessandro (Pavia U. ; INFN, Pavia) ; Aimè, Chiara (INFN, Pavia ; Pisa U.) ; Arena, Maria Cristina (Pavia U. ; CERN) ; Biagini, Davide (Turin U. ; INFN, Turin) ; Braghieri, Alessandro (INFN, Pavia) ; Brunoldi, Matteo (Pavia U. ; INFN, Pavia) ; Calzaferri, Simone (Pavia U. ; INFN, Pavia) ; Dinuccio, Elio (Turin U. ; INFN, Turin) ; Dondi, Daniele (INFN, Pavia ; Pavia U.) ; Finco, Linda (INFN, Turin) et al.
The CH4 Livestock Emission (CH4rLiE) project aims at developing a prototype for methane emissions capture in a barn environment. [...]
arXiv:2503.03692.
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Long-Term Ageing Studies on Eco-Friendly Resistive Plate Chamber Detectors
/ Abbrescia, Marcello (Bari U. ; INFN, Bari) ; Aielli, Giulio (Rome U., Tor Vergata ; INFN, Rome2) ; Aly, Reham (Helwan U. ; INFN, Bari) ; Arena, Maria Cristina (Pavia U.) ; Ferreira, Mapse Barroso (Rio de Janeiro State U.) ; Benussi, Luigi (Frascati) ; Bianco, Stefano (Frascati) ; Bordon, Fabio (CERN) ; Boscherini, Davide (INFN, Bologna) ; Bruni, Alessia (INFN, Bologna) et al.
In high-energy physics, resistive plate chamber (RPC) detectors operating in avalanche mode make use of a high-performance gas mixture. Its main component, Tetrafluoroethane (C2H2F4), is classified as a fluorinated greenhouse gas. [...]
2025 - 10 p.
- Published in : Particles: 8 (2025) , no. 1, pp. 15
- Published in : Particles: 8 (2025) , no. 1, pp. 15
Fulltext: PDF;
In : 13th International Conference on New Frontiers in Physics 2024 (ICNFP 2024), Kolymbari, Greece, 26 Aug - 4 Sep 2024, pp.15
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Characterization of glass multigap RPC detector with alternative gas to SF6
/ Verzeroli, Mattia (IP2I, Lyon) ; Guida, Roberto (CERN) ; Laktineh, Imad (IP2I, Lyon) ; Mandelli, Beatrice (CERN) ; Rigoletti, Gianluca (CERN)
Glass Multi-gap Resistive Plate Chamber detectors are primarily valued for their exceptional time resolution and are widely used in fields such as high-energy physics and tomography applications. Traditionally, these detectors are operated using Freon-based gas mixtures, primarily composed of C2H2F4 (R134a) and SF6, both classified as greenhouse gases. [...]
2025
- Published in : Nucl. Instrum. Methods Phys. Res., A 1078 (2025) 170591
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Evaluating the performance and long-term stability with LHC-like background irradiation of RPC detectors with CO2-based gas mixtures
/ Juks, Stefania A (U. Paris-Saclay) ; Guida, Roberto (CERN) ; Mandelli, Beatrice (CERN) ; Rigoletti, Gianluca (CERN) ; Verzeroli, Mattia (Lyon U.)
Resistive Plate Chamber (RPC) detectors at CERN’s LHC experiments traditionally use a Freon-based gas mixture containing C2H2F4 (R-134a) and SF6, both of which are high global warming potential (GWP) gases. To reduce greenhouse gas (GHG) emissions, operational costs, and optimise RPC performance, one possible mid-term solution is the gas mixture with a substitution of 30% of R-134a with CO2 in the standard RPC gas mixture. [...]
2025 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1080 (2025) 170744
In : 17th International Conference on Resistive Plate Chambers and Related Detectors, Santiago de Compostela, 09 - 13 Sep 2024, pp.170744
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Long-term stability of SWPCs in monitoring CF4-based gas mixture in CMS CSC detectors
/ Verzeroli, Mattia (IP2I, Lyon) ; Arena, Maria Cristina (Pavia U.) ; Guida, Roberto (CERN) ; Mandelli, Beatrice (CERN) ; Rigoletti, Gianluca (CERN)
At the CERN CMS experiment, CSC detectors are employed and operated with a gas mixture based on CF$_4$. In 2015, two Single Wire Proportional Chambers (SWPCs) were installed along the gas line to monitor the quality of the gas. [...]
2025 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1077 (2025) 170539
In : 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors, CERN, Geneva, Switzerland, 6 - 10 Nov 2023, pp.170539
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Studies of F- impurities formation in ALICE MID RPC detectors: A comparison between LHC RUN2 and LHC RUN3
/ Verzeroli, Mattia (IP2I, Lyon) ; Arena, Maria Cristina (Pavia U.) ; Ferretti, Alessandro (U. Turin (main) ; INFN, Turin) ; Gagliardi, Martino (U. Turin (main) ; INFN, Turin) ; Guida, Roberto (CERN) ; Mandelli, Beatrice (CERN) ; Quaglia, Luca (INFN, Turin) ; Rigoletti, Gianluca (CERN) ; Terlizzi, Livia (U. Turin (main) ; INFN, Turin)
The ALICE Muon Identifier (MID) system consists of 72 single-gap Resistive Plate Chamber (RPC) detectors, operated with a gas mixture of C2H2F4, iC4H10, and SF6 at a ratio of 89.7%/10%/0.3%, along with 37% of relative humidity. The combined effects of background irradiation and the electric field within the detector’s gas gap, together with the high concentration of fluorinated gases used, result in the production of F− ions and F-based impurities. [...]
2025
- Published in : Nucl. Instrum. Methods Phys. Res., A 1076 (2025) 170515
In : 17th International Conference on Resistive Plate Chambers and Related Detectors, Santiago de Compostela, 09 - 13 Sep 2024, pp.170515
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Eco-friendly resistive plate chamber detectors for HEP applications
/ Pastore, A (INFN, Bari) ; Congedo, L (INFN, Bari) ; Abbrescia, M (INFN, Bari) ; Aly, R (INFN, Bari) ; Serio, M De (INFN, Bari) ; Galati, G (INFN, Bari) ; Pugliese, G (INFN, Bari) ; Ramos, D (INFN, Bari) ; Simone, S (INFN, Bari) ; Boscherini, D (INFN, Bologna) et al.
Resistive Plate Chamber detectors are largely employed in current High Energy Physics experiments, thanks to their relatively low cost and good spatial/time resolution. They are typically operated in avalanche mode with large fractions of Tetrafluoroethane (C2H2F4), a gas recently banned by the European Union due to its high Global Warming Potential (GWP). [...]
2025 - 12 p.
- Published in : Int. J. Mod. Phys. A 40 (2025) 2541002
In : 11th International Conference on New Frontiers in Physics (ICNFP 2022), Kolymbari, Crete, Greece, 30 Aug - 11 Sep 2022, pp.2541002
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Search for heavy neutral leptons in $\pi^+$ decays to positrons
/ Bloch-Devaux, Brigitte (Louvain U., CP3 ; Birmingham U.) ; Cortina Gil, Eduardo (Louvain U., CP3) ; Minucci, Elisa (Louvain U., CP3 ; Frascati) ; Padolski, Sergey (Louvain U., CP3) ; Petrov, Plamen (Louvain U., CP3) ; Numao, Toshio (TRIUMF) ; Petrov, Yevgeniy (TRIUMF) ; Velghe, Bob (TRIUMF) ; Wong, Vincent Wai Sum (TRIUMF) ; Shang, Victor (TRIUMF) et al.
A search for heavy neutral lepton ($N$) production in $\pi^+\to e^+ N$ in-flight decays using data collected by the NA62 experiment at CERN in 2017-2024 is reported. Upper limits for the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the level of $10^{-8}$ for heavy neutral leptons with mass in the range 95-126 MeV/$c^2$ and lifetime exceeding 50 ns..
arXiv:2507.07345; CERN-EP-2025-152.-
Geneva : CERN, 2025 - 16 p.
Draft (restricted): PDF; Fulltext: CERN-EP-2025-152 - PDF; 2507.07345 - PDF;
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