Conveners
Alternative Mixtures and Longevity
- Gilvan Augusto Alves (CBPF - Brazilian Center for Physics Research (BR))
Alternative Mixtures and Longevity
- Eliza Melo (Universidade do Estado do Rio de Janeiro (BR))
- Mauricio Thiel (Universidade do Estado do Rio de Janeiro (BR))
Alternative Mixtures and Longevity
- Luiz Mundim (Universidade do Estado do Rio de Janeiro (BR))
Description
Auditorium 111 (UERJ/Maracanã)
This session is dedicated to Eco-gas R&D and long-term operation: low-GWP mixtures, gas systems/recirculation, irradiation and aging studies, impurities, and mitigation strategies.
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Marcello Abbrescia (Universita e INFN, Bari (IT))15/09/2026, 09:20Alternative Mixtures and LongevityTalk
Gaseous detectors are widely employed in high-energy physics experiments, where their operation often relies on fluorinated gases with a high Global Warming Potential. In light of increasing environmental awareness and tightening regulations, the identification of sustainable and low-impact gas mixtures has become a priority for the community.
Resistive Plate Chambers (RPCs) operated in...
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Joao Pinheiro (Universidade do Estado do Rio de Janeiro (BR))15/09/2026, 09:40Alternative Mixtures and LongevityTalk
Resistive Plate Chamber (RPC) detectors in the Compact Muon Solenoid (CMS) experiment operate with a gas mixture comprised of 95.2% of C2H2F4, that provides a high number of ion-electron pairs, 4.5% of iC4H10, that ensures the suppression of photon-feedback effects and 0.3% of SF6, used as an electron quencher to further operate the detector in streamer-free mode. C2H2F4 is known to be a...
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Luca Quaglia (Universita e INFN Torino (IT))15/09/2026, 10:30Alternative Mixtures and LongevityTalk
The gas mixtures employed in most RPC systems contain a high fraction of fluorinated greenhouse gases (F-gases), namely C2H2F4 (R134a) and SF6, which have been placed under intense scrutiny by the EU, aiming at a reduction in their availability and usage, making RPC operation more costly and less sustainable.
A possible long-term solution to this problem is to find eco-friendly alternatives...
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Gianluca Rigoletti (CERN)15/09/2026, 10:50Alternative Mixtures and LongevityTalk
Resistive Plate Chambers at the CERN LHC experiments are operated with gas mixtures based on R-134a, i-C4H10 and SF6. R-134a and SF6 are potent greenhouse gases, known for their high Global Warming Potential, and are therefore subject to decreasing availability due to the European regulation on F-gases.
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A mid-term solution was identified in reducing the use of R-134a by diluting the standard... -
Luca Quaglia (Universita e INFN Torino (IT))15/09/2026, 11:10Alternative Mixtures and LongevityTalk
Gaseous detectors play a key role in particle physics, yet their operation often relies on fluorinated gases with very high Global Warming Potential. In particular, Resistive Plate Chambers (RPCs) operated in avalanche mode typically employ high-performance gas mixtures containing high-GWP components such as C₂H₂F₄ and SF₆.
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With increasing environmental concerns and progressively tighter... -
Sinem Simsek (Istinye University (TR))15/09/2026, 11:30Alternative Mixtures and LongevityTalk
The trigger system in the barrel region of the ATLAS experiment at CERN relies on about 3700 2 mm gas-gap Resistive Plate Chambers (RPCs), which will be upgraded during Long Shutdown 3 with an additional system of about 1000 new 1 mm gas-gap RPCs to be installed in the muon Inner Barrel. Since 2008 and until 2023, these detectors have been operated in avalanche mode with a gas mixture based on...
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Alessandro Ferretti (Universita e INFN Torino (IT))15/09/2026, 14:30Alternative Mixtures and LongevityTalk
The first batch of ALICE MID Resistive Plate Chambers was produced in 2005, more than twenty years ago. Since then, these gas gaps have either been operated in the ALICE MID or stored under controlled temperature conditions as spares.
In 2022, two MID gas gaps were replaced due to increasing dark currents and were subsequently studied with the ALICE RPC cosmic-ray test station in Torino....
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Reham Aly (Politecnico - Universita e INFN, Bari (IT))15/09/2026, 14:50Alternative Mixtures and LongevityTalk
The Compact Muon Solenoid (CMS) Resistive Plate Chamber (RPC) system has operated successfully during the LHC Run 1, Run 2, and Run 3 data-taking periods. During the High-Luminosity Large Hadron Collider (HL-LHC) phase, the instantaneous luminosity is expected to increase by up to a factor of five with respect to the nominal LHC conditions, leading to higher background rates and harsher...
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